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Collins, Emmanuel
MODELING OF SKID-STEERED WHEELED ROBOTIC VEHICLES ON SLOPED TERRAINS Camilo Ordonez Center radii. This work presents the analysis and experimental verification of a dynamic model for skid-steered for Intelligent Systems, Controls and Robotics (CISCOR) Department of Mechanical Engineering Florida A
Hydrological Evaluation of Septic Disposal Field Design in Sloping Terrains
Walter, M.Todd
. Steenhuis7 Abstract: The most common form of onsite domestic wastewater treatment in the United States; Slopes; Wastewater treatment; Waste disposal. Introduction The most common form of onsite wastewater treatment is the septic system Wastewater 1991 . Over 50 million people in the United States use septic
Bipedal Robotic Walking on Flat-Ground, Up-Slope and Rough Terrain with Human-Inspired Hybrid Zero Dynamics
Nadubettu Yadukumar, Shishir 1986-
The thesis shows how to achieve bipedal robotic walking on flat-ground, up-slope and rough terrain by using Human-Inspired control. We begin by considering human walking data and find outputs (or virtual constraints) that, when calculated from...
Duchaineau, M. [Los Alamos National Lab., NM (United States)]|[Lawrence Livermore National Lab., CA (United States); Wolinsky, M.; Sigeti, D.E. [Los Alamos National Lab., NM (United States)] [and others
Real-time terrain rendering for interactive visualization remains a demanding task. We present a novel algorithm with several advantages over previous methods: our method is unusually stingy with polygons yet achieves real-time performance and is scalable to arbitrary regions and resolutions. The method provides a continuous terrain mesh of specified triangle count having provably minimum error in restricted but reasonably general classes of permissible meshes and error metrics. Our method provides an elegant solution to guaranteeing certain elusive types of consistency in scenes produced by multiple scene generators which share a common finest-resolution database but which otherwise operate entirely independently. This consistency is achieved by exploiting the freedom of choice of error metric allowed by the algorithm to provide, for example, multiple exact lines-of-sight in real-time. Our methods rely on an off-line pre-processing phase to construct a multi-scale data structure consisting of triangular terrain approximations enhanced ({open_quotes}thickened{close_quotes}) with world-space error information. In real time, this error data is efficiently transformed into screen-space where it is used to guide a greedy top-down triangle subdivision algorithm which produces the desired minimal error continuous terrain mesh. Our algorithm has been implemented and it operates at real-time rates.
Terrainosaurus: realistic terrain synthesis using genetic algorithms
Saunders, Ryan L.
), are solid evidence that believable terrain can be visualized in real-time with current technology. Terrain generation, in contrast, has received comparatively little treatment in the literature. Fractal-based techniques are the most prevalent, because... noted, fractal methods for terrain generation are limited in the types of terrain they can simulate, and one generally has to resort to elevation maps digitized from the real world to get more interesting and believable terrain models. In this thesis, I...
Evaluating Hydrology Preservation of Simplified Terrain Representations
Varela, Carlos
Evaluating Hydrology Preservation of Simplified Terrain Representations Ph. D. Student: Christopher captures the hydrology is important for determining the effectiveness of a terrain simplification technique also present a novel ter- rain simplification algorithm based on the compression of hydrology features
Terrain identification methods for planetary exploration rovers
Brooks, Christopher Allen, 1978-
Autonomous mobility in rough terrain is becoming increasingly important for planetary exploration rovers. Increased knowledge of local terrain properties is critical to ensure a rover's safety, especially when driving on ...
Terrain Characterization and Classification with a Mobile
Borenstein, Johann
, commonly known categories, such as gravel, sand, or as- phalt. Terrain characterization, on the other hand aims at associating terrain with well-defined categories, such as gravel, sand, or dirt. A related for a turn is lower when driving over sand or wet grass than when driving on packed dirt or asphalt. In order
Alteration of Terrain Permits (New Hampshire)
Broader source: Energy.gov [DOE]
This permit is required whenever a project proposes to disturb more than 100,000 square feet of contiguous terrain (50,000 square feet if any portion of project is within protected shoreland), or...
Evaluating Hydrology Preservation of Simplified Terrain Representations
Franklin, W. Randolph
Evaluating Hydrology Preservation of Simplified Terrain Representations Jonathan Muckella , Marcus network. A quan- titative measurement of how accurately a drainage network captures the hydrology to preserve the important hydrology features. This method and other simplification schemes are then evaluated
Terrain Trafficability Characterization with a Mobile Robot
Borenstein, Johann
for a turn is lower when driving over sand or wet grass than when driving on packed dirt or asphalt tests we collected data on a variety of different terrains, such as gravel, sand, asphalt, grass
High performance robotic traverse of desert terrain.
Whittaker, William (Carnegie Mellon University, Pittsburgh, PA)
This report presents tentative innovations to enable unmanned vehicle guidance for a class of off-road traverse at sustained speeds greater than 30 miles per hour. Analyses and field trials suggest that even greater navigation speeds might be achieved. The performance calls for innovation in mapping, perception, planning and inertial-referenced stabilization of components, hosted aboard capable locomotion. The innovations are motivated by the challenge of autonomous ground vehicle traverse of 250 miles of desert terrain in less than 10 hours, averaging 30 miles per hour. GPS coverage is assumed to be available with localized blackouts. Terrain and vegetation are assumed to be akin to that of the Mojave Desert. This terrain is interlaced with networks of unimproved roads and trails, which are a key to achieving the high performance mapping, planning and navigation that is presented here.
Speed Map for Autonomous Rovers over Rough Terrain
Loh, Jonathan Edau
Grid Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . .considered obstacles [27] Grid Map showing Tile Size, Cellspeed map. It also covers grid maps and terrain roughness,
Adaptive Streaming and Rendering of Large Terrains using Strip Masks
Paris-Sud XI, Universit� de
Adaptive Streaming and Rendering of Large Terrains using Strip Masks Joachim Pouderoux Jean-Eudes Marvie IPARLA Project (LaBRI - INRIA Futurs) University of Bordeaux, France Abstract Terrain rendering is an important factor in the rendering of virtual scenes. If they are large and detailed, digital terrains can
Creating Standards for Winter Terrain Parks
to engineering frame motivated creation of a 501c(3) non-profit, United States Terrain Park Council Dedicated fatalities (31 male, 6 female) mostly young J. Shealy (2000) Snowboard injury rate doubled during 1990-2000 from 3.37 to 6.97 per 1000 skier days Deaths: 50 (2007-2008) 39 (2008-2009) Compiled by California Ski
Accurate Wind Characterization in Complex Terrain Using the Immersed Boundary Method
Lundquist, K A; Chow, F K; Lundquist, J K; Kosovic, B
This paper describes an immersed boundary method (IBM) that facilitates the explicit resolution of complex terrain within the Weather Research and Forecasting (WRF) model. Two different interpolation methods, trilinear and inverse distance weighting, are used at the core of the IBM algorithm. Functional aspects of the algorithm's implementation and the accuracy of results are considered. Simulations of flow over a three-dimensional hill with shallow terrain slopes are preformed with both WRF's native terrain-following coordinate and with both IB methods. Comparisons of flow fields from the three simulations show excellent agreement, indicating that both IB methods produce accurate results. However, when ease of implementation is considered, inverse distance weighting is superior. Furthermore, inverse distance weighting is shown to be more adept at handling highly complex urban terrain, where the trilinear interpolation algorithm breaks down. This capability is demonstrated by using the inverse distance weighting core of the IBM to model atmospheric flow in downtown Oklahoma City.
TERRAIN ESTIMATION USING INTERNAL SENSORS Debangshu Sadhukhan, Carl Moore, Emmanuel Collins
Collins, Emmanuel
was successful in identifying gravel, packed dirt, and grass. KEY WORDS Mobile robot, terrain identification. For our research "sensing terrain" means determining the type of terrain, i.e.: gravel, sand, asphalt, mud
Hydrology-Aware Constrained Triangulation of Terrain Data
Franklin, W. Randolph
Hydrology-Aware Constrained Triangulation of Terrain Data Jonathan Muckella , Marcus Andradeb , W present a new data structure for simplifing terrain that captures hydrology significant features using. This allows better compression ratios the standard Triangu- lated Irregular Networks with highier hydrology
Design of a chain flail mower for leveling rough terrain
Flores, Aaron (Aaron N.)
The flail mower is a piece of agricultural equipment that uses bladed attachments rotating around a drum to cut down bushes and grassy terrain. One major drawback to the flail mower is the rapid wear that happens almost ...
Feature-based Terrain Editing From Complex Sketches
Tasse, Flora Ponjou; Emilien, Arnaud; Cani, Marie-Paule; Hahmann, Stefanie; Dodgson, Neil
with plausible details.160 Cohen et al. [10] and Watanabe et al. [11] present the first161 terrain modelling interfaces that take as input a 2D silhouette162 stroke directly drawn on a 3D terrain model. They only han-163 dle a single silhouette stroke... -junctions. Our method is also able to han-637 dle complex mountains where ridges are not as well-defined as638 they are on smooth landscapes. An example of this is shown639 in Figure 10. Our proposed approach differs from other sketch-640 based methods...
Pielke, Roger A.
MESOSCALE MODELLING OF WIND ENERGY OVER NON-HOMOGENEOUS TERRAIN (ReviewArticle) Y. MAHRER.1. OBSERVATIONALAPPROACHES Evaluations of wind energy based on wind observations (usually surface winds) at well, the resolution of the wind energy pattern throughout an extended area by this methodology requires a large number
Unsupervised Learning of Terrain Appearance for Automated Coral Reef Exploration
Dudek, Gregory
Unsupervised Learning of Terrain Appearance for Automated Coral Reef Exploration Philippe Giguere above a coral reef, without the need to maintain pose estimates. We tested the technique in simulation autonomously above a coral reef during a 20 minutes period. 1. Introduction Underwater marine environments
Fernandez, Thomas
MARS TERRAIN IMAGE CLASSIFICATION USING CARTESIAN GENETIC PROGRAMMING J. Leitner, S. Harding, A. F to human designed approaches, a great deal of progress has been made using machine learning techniques to perform classification from images. In this work, we demonstrate the first known use of Cartesian Genetic
Digital Terrain Modeling Ayman F. Habib ENGO 573: Chapter 4
Habib, Ayman
Photography (Tropical) SPOT Satellite Aerial Photography (Urban) Satellite Stereo SAR (RADARSAT) Airborne orthogonally projected maps. · Procedure: Interior orientation. · Calibration procedure. Exterior a calibration procedure. #12;10 Digital Terrain Modeling Ayman F. Habib 19 Test Field for Camera Calibration
Oldenburg, Carl von Ossietzky Universität
BAYESIAN METHOD FOR SEGMENTATION OF SAR IMAGES IN ROUGH TERRAIN Marco Caparrini1 , Klaus Seidel1 are the basis for radiometric correction. Considering SAR images, the huge amount of processing for geographic and geometric calibration and registration that is needed prior to analysis is well established. Nonetheless
ROAMing terrain (Real-time Optimally Adapting Meshes)
Duchaineau, M.; Wolinsky, M.; Sigeti, D.E.; Miller, M.C.; Aldrich, C.; Mineev, M.
Terrain visualization is a difficult problem for applications requiring accurate images of large datasets at high frame rates, such as flight simulation and ground-based aircraft testing using synthetic sensor stimulation. On current graphics hardware, the problem is to maintain dynamic, view-dependent triangle meshes and texture maps that produce good images at the required frame rate. We present an algorithm for constructing triangle meshes that optimizes flexible view-dependent error metrics, produces guaranteed error bounds, achieves specified triangle counts directly, and uses frame-to-frame coherence to operate at high frame rates for thousands of triangles per frame. Our method, dubbed Real-time Optimally Adapting Meshes (ROAM), uses two priority queues to drive split and merge operations that maintain continuous triangulations built from pre-processed bintree triangles. We introduce two additional performance optimizations: incremental triangle stripping and priority-computation deferral lists. ROAM execution time is proportionate to the number of triangle changes per frame, which is typically a few percent of the output mesh size, hence ROAM performance is insensitive to the resolution and extent of the input terrain. Dynamic terrain and simple vertex morphing are supported.
Atmospheric studies in complex terrain: a planning guide for future studies
Orgill, M.M.
The objective of this study is to assist the US Department of Energy in Conducting its atmospheric studies in complex terrain (ASCOT0 by defining various complex terrain research systems and relating these options to specific landforms sites. This includes: (1) reviewing past meteorological and diffusion research on complex terrain; (2) relating specific terrain-induced airflow phenomena to specific landforms and time and space scales; (3) evaluating the technical difficulty of modeling and measuring terrain-induced airflow phenomena; and (4) avolving severdal research options and proposing candidate sites for continuing and expanding field and modeling work. To evolve research options using variable candidate sites, four areas were considered: site selection, terrain uniqueness and quantification, definition of research problems and research plans. 36 references, 111 figures, 20 tables.
Mapping textures on 3d terrains: a hybrid cellular automata approach
Sinvhal, Swapnil
?. Benati [7] showed that cellular automata can be used to model phenomena typical of living communities like reproduction, self-organization and a complex evolution. An interesting relation between fractals and cellular automata has been discussed... automata approach to represent a model. This gives the advantage of direct texture simulation on the model. II.c Terrain Generation Fractals [57] have been used to generate terrains by many terrain generation engines like fracPlanet [1] and Frac...
On-the-Fly Decompression and Rendering of Multiresolution Terrain
Lindstrom, P; Cohen, J D
We present a streaming geometry compression codec for multiresolution, uniformly-gridded, triangular terrain patches that supports very fast decompression. Our method is based on linear prediction and residual coding for lossless compression of the full-resolution data. As simplified patches on coarser levels in the hierarchy already incur some data loss, we optionally allow further quantization for more lossy compression. The quantization levels are adaptive on a per-patch basis, while still permitting seamless, adaptive tessellations of the terrain. Our geometry compression on such a hierarchy achieves compression ratios of 3:1 to 12:1. Our scheme is not only suitable for fast decompression on the CPU, but also for parallel decoding on the GPU with peak throughput over 2 billion triangles per second. Each terrain patch is independently decompressed on the fly from a variable-rate bitstream by a GPU geometry program with no branches or conditionals. Thus we can store the geometry compressed on the GPU, reducing storage and bandwidth requirements throughout the system. In our rendering approach, only compressed bitstreams and the decoded height values in the view-dependent 'cut' are explicitly stored on the GPU. Normal vectors are computed in a streaming fashion, and remaining geometry and texture coordinates, as well as mesh connectivity, are shared and re-used for all patches. We demonstrate and evaluate our algorithms on a small prototype system in which all compressed geometry fits in the GPU memory and decompression occurs on the fly every rendering frame without any cache maintenance.
Wavelet Analysis for a New Multiresolution Model for Large-Scale Textured Terrains
Illes Balears, Universitat de les
Wavelet Analysis for a New Multiresolution Model for Large-Scale Textured Terrains María José transmission of both geometry and textures of a terrain model. Wavelet Multiresolution Analysis is applied. An innovative texture synthesis process based on Wavelet classification is used in the reconstruction
Energetically Optimal Travel across Terrain: Visualizations and a New Metric of Geographic Distance with Archaeological Applications
Wood, Zoë J.
Energetically Optimal Travel across Terrain: Visualizations and a New Metric of Geographic Distance the energetically least cost path is shown in blue. This visualization shows how least cost paths often follow propose new methods for terrain visualization and analysis based on measuring paths of least caloric
A Uniform Sky Illumination Model to Enhance Shading of Terrain and Urban Areas
Stewart, James
. Brookville, NY 11050 USA (516) 299-2652 firstname.lastname@example.com Fax: (516) 299-3945 and A. James Stewart (Foley et al. 1990). Cartographers consider the same factors when shading terrain. Imhof (1982) discussed reflector (Foley et al. 1990; Weibel and Heller 1991; Zhou 1992). Because most terrain elements behave more
S. D. Schery; P. T. Wasiolek; Y. Li
Federal legislation expresses a long-term goal of reducing indoor radon to levels comparable to those outdoors. A thorough understanding of the behavior of radon and its progeny in the outdoor environment is therefore important We report near-surface measurements of radon, attached-to-aerosol progeny, and unattachcd-toaerosol progeny in the contrasting environments of the forested hill country of Oak Ridge, TN and the desert sands of White Sands National Monument, NM. Vertical progeny gradients are greater at White Sands due to a smoother terrain, and dose levels tend to be lower due to lower radon flux from the gypsum sand. Both sites show a significant diurnal variation of dose rate with a maximum occurring usually in the early morning. Correlation of dose rate variation with radon variation is surprisingly small suggesting the importance of other factors such as progeny deposition and aerosol concentration in controlling outdoor dose.
Innovative Gamma Ray Spectrometer Detection Systems for Conducting Scanning Surveys on Challenging Terrain - 13583
Palladino, Carl; Mason, Bryan; Engle, Matt; LeVangie, James [The Palladino Company, Inc., 720 Fillmore St., San Francisco, CA 94117 (United States)] [The Palladino Company, Inc., 720 Fillmore St., San Francisco, CA 94117 (United States); Dempsey, Gregg [United States Environmental Protection Agency, P.O. Box 98517, Las Vegas, NV 89193-8517 (United States)] [United States Environmental Protection Agency, P.O. Box 98517, Las Vegas, NV 89193-8517 (United States); Klemovich, Ron [HydroGeoLogic, Inc., 6340 Glenwood, Suite 200, Building No. 7, Overland Park, KS 66202 (United States)] [HydroGeoLogic, Inc., 6340 Glenwood, Suite 200, Building No. 7, Overland Park, KS 66202 (United States)
The Santa Susana Field Laboratory located near Simi Valley, California was investigated to determine the nature and extent of gamma radiation anomalies. The primary objective was to conduct gamma scanning surveys over 100 percent of the approximately 1,906,000 square meters (471 acre) project site with the most sensitive detection system possible. The site had challenging topography that was not conducive to traditional gamma scanning detection systems. Terrain slope varied from horizontal to 48 degrees and the ground surface ranged from flat, grassy meadows to steep, rocky hillsides. In addition, the site was home to many protected endangered plant and animal species, and archaeologically significant sites that required minimal to no disturbance of the ground surface. Therefore, four innovative and unique gamma ray spectrometer detection systems were designed and constructed to successfully conduct gamma scanning surveys of approximately 1,076,000 square meters (266 acres) of the site. (authors)
An Algorithm for the Visualization of a Terrain with Objects FLVIO SZENBERG
such as houses, vehicles, and transmission lines, thus allowing a simulated flight. For the objects, described and rapidly, aerial images of terrain with objects such as houses, vehicles, and transmission lines, thus
The design of a frame for an all terrain, lever propelled wheelchair
Walton, John Michael
This thesis outlines the process of designing a frame for the Leveraged Freedom Chair (LFC) Prime, an all-terrain levered powered wheelchair designed to improve the mobility of disabled individuals. This design allows for ...
Modelling of wind turbine wakes in complex terrain using computational fluid dynamics�
Makridis, Alexandros
This thesis focuses on modelling of wind turbine wakes when they are affected by real complex terrain features, such as hills and forests, and also examines the effect of the rotational momentum imparted to the downstream ...
Subsidence of residual soils in a karst terrain
Drumm, E.C.; Kane, W.F.; Ben-Hassine, J.; Scarborough, J.A. (Tennessee Univ., Knoxville, TN (USA)); Ketelle, R.H. (Oak Ridge National Lab., TN (USA))
Siting and operating landfills for solid waste disposal in eastern Tennessee that can operate with minimum impact on groundwater is problematic. The operational requirement of thick, excavational soils and the regulatory requirement of a buffer between disposal units and an aquifer result in siting most operating East Tennessee landfills in outcrop areas of the Knox Group. However, the common occurrence of karst terrain and sinkholes in the Knox Group indicates the vulnerability of such sites to rapid groundwater recharge and flow and the potential for subsidence or collapse of soil into bedrock cavities. To address the potential for subsidence or collapse of soils at the East Chestnut Ridge site on the Department of Energy's (DOE) Oak Ridge Reservation (ORR), the following activities and analyses were completed: The locations of karst features on the site were determined by field reconnaissance; several sinkholes were selected for detailed examination; soil boring, sampling, and physical testing were performed in soils located within, adjacent to, and outside of sinkholes to characterize soil strength at various depths; detailed plane surveys were made for 11 sinkholes to measure accurately their dimension and shape for use in determining profile functions for subsidence basins at the site; The stress-deformation response of a typical soil profile overlying a hypothetical bedrock cavity was analyzed numerically for a range of soil thickness and a range of cavity radii. A consistent estimate of the relationship between subsidence basin dimension, soil thickness, and cavity radius has been derived. 30 refs., 41 figs., 7 tabs.
Multiphase production through hilly terrain pipelines in Cusiana oilfield, Colombia
Hill, T.J.; Fairhurst, C.P.; Nelson, C.J.; Becerra, H.; Bailey, R.S.
The Cusiana oilfield in Colombia is currently producing about 180,000 bpd through a complex multiphase flowline network. The terrain of the area is very hilly, with substantial elevation changes along the length of the lines. Prediction of pressure drop using industry standard correlations has been very variable in its accuracy. A revised pressure drop method, including the effect of slug formation and decay, has been produced, with appreciably better performance. Field data on flow regime characteristics from several of the lines are presented to show a transition from surging/slugging to a steady {open_quote}homogeneous{close_quote} flow at relatively low mixture velocity. The effect of slug flow on slugcatcher performance has also been assessed, both by direct measurement, and by use of a dynamic simulator. The simulator is used to test new control schemes prior to implementation. At low flowing velocities one line has been seen to undergo large pressure swings and to exhibit slug production due to liquid accumulation and sweepout. This effect is described, and re-produced using a transient simulator.
Ultrawideband radar clutter measurements of forested terrain, 1991--1992
Sheen, D.M.; Severtsen, R.H.; Prince, J.M.; Davis, K.C.; Collins, H.D.
The ultrawideband (UWB) radar clutter measurements project was conducted to provide radar clutter data for new ultrawideband radar systems which are currently under development. A particular goal of this project is to determine if conventional narrow band clutter data may be extrapolated to the UWB case. This report documents measurements conducted in 1991 and additional measurements conducted in 1992. The original project consisted of clutter measurements of forested terrain in the Olympic National Forest near Sequim, WA. The impulse radar system used a 30 kW peak impulse source with a 2 Gigasample/second digitizer to form a UHF (300--1000 MHz) ultrawideband impulse radar system. Additional measurements were conducted in parallel using a Systems Planning Corporation (SPC) step-chirp radar system. This system utilized pulse widths of 1330 nanoseconds over a bandwidth of 300--1000 MHz to obtain similar resolution to the impulse system. Due to the slow digitizer data throughput in the impulse radar system, data collection rates were significantly higher using the step-chirp system. Additional forest clutter measurements were undertaken in 1992 to increase the amount of data available, and especially to increase the amount of data from the impulse radar system.
Low-cost multi-terrain autonomous vehicle for hostile environments
Perez, M. L., LLNL
This paper describes an innovative and unique autonomous vehicle being developed at the Lawrence Livermore National Laboratory (LLNL) for versatile use in hostile environments. Conventional vehicles used in decommissioning and decontaminating, police activity, and unmanned military operations typically are designed with four-wheels or track in contact with the environment. Although four-wheel and track vehicles work well, they are limited in negotiating saturated terrain, steep hills and soft soils. The Spiral Track Autonomous Robot (STAR) is a versatile and maneuverable multi-terrain mobile vehicle that uses the latest available computer technology and two Archimedes screws, in contact with the local environment to intelligently negotiate a hostile environment.
Engineering Applications of Artificial Intelligence 16 (2003) 465472 Predicting terrain contours using a feed-forward neural network
Chen, Sheng
Engineering Applications of Artificial Intelligence 16 (2003) 465472 Predicting terrain contours in pneumatic systems and they are difficult to prevent completely. This caused problems during the testing. 2. Prediction of unknown terrain The legs of the robot needed to be lifted at the end
Real-time Rendering of Complex Vector Data on 3d Terrain Models
Behnke, Sven
Real-time Rendering of Complex Vector Data on 3d Terrain Models M. Schneider, M. Guthe, and R of buildings, streets and runway (from left to right). Abstract. In this paper we present a hybrid technique model. The first part of this hybrid technique is a texture-based approach that is especially suited
Development of a Hybrid Powered 2D Biped Walking Machine Designed for Rough Terrain Locomotion
Baker, Bryce C.
has built a three legged 2D biped walking machine to be used as a test stand for studying rough terrain walking. The specific aim of this research is to investigate how biped walkers can best maintain walking stability when acted upon by small...
Building Local Terrain Maps Using SpatioTemporal Classification for Semantic Robot Localization
Zell, Andreas
of the environment. We describe how to efficiently integrate the classification results of each time stepBuilding Local Terrain Maps Using SpatioTemporal Classification for Semantic Robot Localization Stefan Laible1 and Andreas Zell1 Abstract-- The correct classification of the surrounding ter- rain
LOD-Sprite Technique for Accelerated Terrain Rendering Baoquan Chen1
Chen, Baoquan
LOD-Sprite Technique for Accelerated Terrain Rendering Baoquan Chen1 SUNY at Stony Brook J. Edward present a new rendering technique, termed LOD-sprite render- ing, which uses a combination of a level-of-detail (LOD) represen- tation of the scene together with reusing image sprites (previously rendered images
A Kalman-Particle Kernel Filter and its Application to Terrain Navigation
Del Moral , Pierre
A Kalman-Particle Kernel Filter and its Application to Terrain Navigation Dinh-Tuan email@example.com Abstract � A new nonlinear filter, the Kalman- Particle Kernel Filter (KPKF) is proposed. Compared. Keywords: Kalman filter, kernel density estimator, regularized particle filter, Inertial navigation System
Simple I/O-efficient flow accumulation on grid terrains Herman Haverkort
Haverkort, Herman
Simple I/O-efficient flow accumulation on grid terrains Herman Haverkort TU Eindhoven Jeffrey #12;Drainage network analysis 1 25 612 1350 flooding flow routing flow accumulation compute network analysis flow routingwatershed labelling flow accumulation #12;Analysing I/O-efficiency main
International Conference on Machine Control & Guidance 2008 1 Generation and Analysis of Digital Terrain Models with
1st International Conference on Machine Control & Guidance 2008 1 Generation and Analysis of Digital Terrain Models with Parallel Guidance Systems for Precision Agriculture G�rres GRENZD�RFFER models at no or little additional cost. In the paper the achievable data accuracy under different
CO2 transport over complex terrain Jielun Sun a,*, Sean P. Burns a
Stephens, Britton B.
CO2 transport over complex terrain Jielun Sun a,*, Sean P. Burns a , Anthony C. Delany a , Steven P; accepted 15 February 2007 Abstract CO2 transport processes relevant for estimating net ecosystem exchange investigated during a pilot experiment. We found that cold, moist, and CO2- rich air was transported downslope
Saving the soil: AgriLife units work to improve training terrain�
Orth, Melanie
Saving the soil AgriLife units work to improve training terrain Story by Melanie Orth txH2O | pg. 9 Heavy tanks and armored vehicles that have continually rolled over the 67,000-acre West Range at Fort Hood for the past 60 years have...
Saving the soil: AgriLife units work to improve traning terrain�
Orth, Melanie
Saving the soil AgriLife units work to improve training terrain Story by Melanie Orth txH2O | pg. 9 Heavy tanks and armored vehicles that have continually rolled over the 67,000-acre West Range at Fort Hood for the past 60 years have...
Brennan, Sean
and the requirement to maintain redundancy in vehicle automation and driver assist systems necessitatesGPS-FREE TERRAIN-BASED VEHICLE TRACKING PERFORMANCE AS A FUNCTION OF INERTIAL SENSOR-free or degraded-GPS environments, achieve vehicle tracking with tactical-grade inertial sensors. However
How to use CFD for Wind in Terrain ... real-life experience!
: � Turbulence modelling / numerical methods � Inclusion of wind turbine wake � Temperature stratification 2 study 3. Construction and operation 4. Wind turbine breakdown! 5. Wind measurements / CFD simulations1 How to use CFD for Wind in Terrain ... real-life experience! CFD day at Suzlon, October 2007 A
Coupled Carbon/Water Fluxes in Complex Terrain, Water-Limited Forests Investigators
Walden, Von P.
Coupled Carbon/Water Fluxes in Complex Terrain, Water-Limited Forests Investigators: Karen Humes of quantifying the magnitude, timing, distribution and coupling of carbon and water fluxes in mountainous forestlands. This includes one segment of the continuum of carbon and water flow from the "forest to the sea
The All Terrain Bio nano Gear for Space Radiation Detection System
Mavroidis, Constantinos
The All Terrain Bio nano Gear for Space Radiation Detection System Ajay Ummat, Constantinos and warn the astronaut of probable biological damage. A basic framework for radiation detection system which utilizes bio-nano machines is discussed. This radiation detection system is termed as "radiation
An Experimental Investigation on the Wake Interference of Wind Turbines Sited Over Complex Terrains
Hu, Hui
1 An Experimental Investigation on the Wake Interference of Wind Turbines Sited Over Complex, 50011 An experimental study was conducted to investigate the interferences of wind turbines sited over conducted in a large wind tunnel with of wind turbine models sited over a flat terrain (baseline case
Interactive terrain visualization enables virtual fieldwork during rapid scientific response to the 2010 Haiti earthquake
Hamann, Bernd
response to the 2010 Haiti earthquake --Manuscript Draft-- Manuscript Number: GS687R1 Full Title: Interactive terrain visualization enables virtual fieldwork during rapid scientific response to the 2010 Haiti earthquake Short Title: Virtual fieldwork, Haiti Article Type: Research Paper Keywords: Enriquillo fault
Wind Regimes in Complex Terrain of the Great Valley of Eastern Tennessee
Birdwell, Kevin R [ORNL
This research was designed to provide an understanding of physical wind mechanisms within the complex terrain of the Great Valley of Eastern Tennessee to assess the impacts of regional air flow with regard to synoptic and mesoscale weather changes, wind direction shifts, and air quality. Meteorological data from 2008 2009 were analyzed from 13 meteorological sites along with associated upper level data. Up to 15 ancillary sites were used for reference. Two-step complete linkage and K-means cluster analyses, synoptic weather studies, and ambient meteorological comparisons were performed to generate hourly wind classifications. These wind regimes revealed seasonal variations of underlying physical wind mechanisms (forced channeled, vertically coupled, pressure-driven, and thermally-driven winds). Synoptic and ambient meteorological analysis (mixing depth, pressure gradient, pressure gradient ratio, atmospheric and surface stability) suggested up to 93% accuracy for the clustered results. Probabilistic prediction schemes of wind flow and wind class change were developed through characterization of flow change data and wind class succession. Data analysis revealed that wind flow in the Great Valley was dominated by forced channeled winds (45 67%) and vertically coupled flow (22 38%). Down-valley pressure-driven and thermally-driven winds also played significant roles (0 17% and 2 20%, respectively), usually accompanied by convergent wind patterns (15 20%) and large wind direction shifts, especially in the Central/Upper Great Valley. The behavior of most wind regimes was associated with detectable pressure differences between the Lower and Upper Great Valley. Mixing depth and synoptic pressure gradients were significant contributors to wind pattern behavior. Up to 15 wind classes and 10 sub-classes were identified in the Central Great Valley with 67 joined classes for the Great Valley at-large. Two-thirds of Great Valley at-large flow was defined by 12 classes. Winds flowed on-axis only 40% of the time. The Great Smoky Mountains helped create down-valley pressure-driven winds, downslope mountain breezes, and divergent air flow. The Cumberland Mountains and Plateau were associated with wind speed reductions in the Central Great Valley, Emory Gap Flow, weak thermally-driven winds, and northwesterly down sloping. Ridge-and-valley terrain enhanced wind direction reversals, pressure-driven winds, as well as locally and regionally produced thermally-driven flow.
Overland flow time of concentration on flat terrains
Chibber, Paramjit
/Duration...............................................................11 2.4.3 Surface Slope...................................................................................12 2.4.4 Roughness Coefficient/Flow Regime ..............................................12 2.4.5 Depression Storage..............................................................................17 2.4.6 Antecedent Moisture Content ..........................................................19 2.5 Stepwise Regression.....................................................................................20 3 METHODOLOGY...
CITPUFF: a gaussian puff model for estimating pollutant concentration in complex terrain. Forest Service research paper
Ross, D.G.; Fox, D.G.; Dietrich, D.L.; Childs, J.E.; Marlatt, W.E.
CITPUFF, is a puff-type dispersion model that uses a wind field calculated from a complex-terrain wind model. It accommodates a variety of source types including point, area, and line sources; calculates plume rise where applicable; and outputs a graphic display of puff trajectories and concentrations. The model is compared against models currently used for assessing air quality impacts in complex topography.
Evaluation of Single-Doppler Radar Wind Retrievals in Flat and Complex Terrain
Newsom, Rob K.; Berg, Larry K.; Pekour, Mikhail S.; Fast, Jerome D.; Xu, Qin; Zhang, Pengfei; Yang, Qing; Shaw, William J.; Flaherty, Julia E.
The accuracy of winds derived from NEXRAD level II data is assessed by comparison with independent observations from 915 MHz radar wind profilers. The evaluation is carried out at two locations with very different terrain characteristics. One site is located in an area of complex terrain within the State Line Wind Energy Center in northeast Oregon. The other site is located in an area of flat terrain on the east-central Florida coast. The National Severe Storm Laboratory�s 2DVar algorithm is used to retrieve wind fields from the KPDT (Pendleton OR) and KMLB (Melbourne FL) NEXRAD radars. Comparisons between the 2DVar retrievals and the radar profilers were conducted over a period of about 6 months and at multiple height levels at each of the profiler sites. Wind speed correlations at most observation height levels fell in the range from 0.7 to 0.8, indicating that the retrieved winds followed temporal fluctuations in the profiler-observed winds reasonably well. The retrieved winds, however, consistently exhibited slow biases in the range of1 to 2 ms-1. Wind speed difference distributions were broad with standard deviations in the range from 3 to 4 ms-1. Results from the Florida site showed little change in the wind speed correlations and difference standard deviations with altitude between about 300 and 1400 m AGL. Over this same height range, results from the Oregon site showed a monotonic increase in the wind speed correlation and a monotonic decrease in the wind speed difference standard deviation with increasing altitude. The poorest overall agreement occurred at the lowest observable level (~300 m AGL) at the Oregon site, where the effects of the complex terrain were greatest.
Adding Complex Terrain and Stable Atmospheric Condition Capability to the Simulator for On/Offshore Wind Farm Applications (SOWFA) (Presentation)
Churchfield, M. J.
This presentation describes changes made to NREL's OpenFOAM-based wind plant aerodynamics solver so that it can compute the stably stratified atmospheric boundary layer and flow over terrain. Background about the flow solver, the Simulator for Off/Onshore Wind Farm Applications (SOWFA) is given, followed by details of the stable stratification/complex terrain modifications to SOWFA, along with some preliminary results calculations of a stable atmospheric boundary layer and flow over a simple set of hills.
Saving the soil: AgriLife units work to improve training terrain
Orth, Melanie
Saving the soil AgriLife units work to improve training terrain Story by Melanie Orth txH2O | pg. 9 Heavy tanks and armored vehicles that have continually rolled over the 67,000-acre West Range at Fort Hood for the past 60 years have... accelerated soil erosion. Fort Hood, the largest active duty armored post in the U.S. Armed Services and located near Killeen in central Texas, uses the range as the primary training and maneuver area for two armored divisions. The Texas Water...
Final Report of the Grant: ''Vertical Transport and Mixing in Complex Terrain Airsheds''
Harindra Joseph Fernando James Anderson Don Boyer Neil Berman
Stable stratification associated with nocturnal thermal circulation in areas of complex terrain leads to interesting and important phenomena that govern local meteorology and contaminant dispersion. Given that most urban areas are in complex topography, understanding and prediction of such phenomena are of immediate practical importance. This project dealt with theoretical, laboratory, numerical and field experimental studies aimed at understanding stratified flow and turbulence phenomena in urban areas, with particular emphasis on flow, turbulence and contaminant transport and diffusion in such flows. A myriad of new results were obtained and some of these results were used to improve the predictive capabilities of the models.
Chow, Fotini Katopodes
11.1 DEVELOPMENT OF AN IMMERSED BOUNDARY METHOD TO RESOLVE COMPLEX TERRAIN IN THE WEATHER RESEARCH AND FORECASTING MODEL Katherine A. Lundquist1 , Fotini K. Chow 2 , Julie K. Lundquist 3 , and Jeffery D. Mirocha 3 in urban areas are profoundly influenced by the presence of build- ings which divert mean flow, affect
A Survey of Procedural Methods for Terrain Modelling Ruben M. Smelik, Klaas Jan de Kraker and Saskia A. Groenewegen
Bidarra, Rafael
such as terrain elevation and growth of plants in the 1980s and 1990s and extended its focus to urban environments or not at all. The integration and adjustment of existing procedural methods in such a way that they can Research (NWO) and the Netherlands ICT Research and Innovation Authority (ICT Regie). #12;current modelling
Modeling, system identication, and control for dynamic locomotion of the LittleDog robot on rough terrain
Levashov, Michael Yurievich
In this thesis, I present a framework for achieving a stable bounding gait on the LittleDog robot over rough terrain. The framework relies on an accurate planar model of the dynamics, which I assembled from a model of the ...
Tornadoes over complex terrain: an analysis of the 28th August 1999 tornadic event in eastern Spain
Romero, Romu
Tornadoes over complex terrain: an analysis of the 28th August 1999 tornadic event in eastern Spain Fi´sica, Universitat de les Illes Balears, Palma de Mallorca 07071, Spain b Instituto Nacional de Meteorologi´a, Centre Meteorolo`gic a les Illes Balears, Palma de Mallorca, Spain c IMEDEA, UIB-CSIC, Palma de
Rear-Projecting Virtual Data onto Physical Terrain: An Exercise in Two Senses Being Better Than One
Bailey, Mike
a computer-displayed 3D terrain map were not sufficient. We wanted to create more insight data set for POW that could be used for the 3D model, we had to merge seven USGS quads (Figure 3): Port shuttle (courtesy of the Earthrise project) showing POW Island from 182 nautical miles. Figure 2: POW
Development of an Integrated Sensor System for Obstacle Detection and Terrain Evaluation for Application to Unmanned Ground
Florida, University of
Development of an Integrated Sensor System for Obstacle Detection and Terrain Evaluation field of view of 50 degrees and 38 degrees, respectively. Two sensor systems were utilized to evaluate., Wexford Pennsylvania ABSTRACT This paper describes the development and performance of a sensor system
The new WAsP flow model: a fast, linearized Mixed Spectral-Integration model applicable to complex terrain
. There is interest in placing wind turbines in hilly and mountainous areas, due to the potentially high speed commercial PC-based tool to estimate wind resources at a potential wind turbine site, given a set of wind challenge for the wind energy industry is the prediction of the wind resource in complex terrain
Shear Wave Velocity Structure of Southern African Crust: Evidence for Compositional Heterogeneity within Archaean and Proterozoic Terrains
Kgaswane, E M; Nyblade, A A; Julia, J; Dirks, P H H M; Durrheim, R J; Pasyanos, M E
Crustal structure in southern Africa has been investigated by jointly inverting receiver functions and Rayleigh wave group velocities for 89 broadband seismic stations spanning much of the Precambrian shield of southern Africa. 1-D shear wave velocity profiles obtained from the inversion yield Moho depths that are similar to those reported in previous studies and show considerable variability in the shear wave velocity structure of the lower part of the crust between some terrains. For many of the Archaean and Proterozoic terrains in the shield, S velocities reach 4.0 km/s or higher over a substantial part of the lower crust. However, for most of the Kimberley terrain and adjacent parts of the Kheis Province and Witwatersrand terrain, as well as for the western part of the Tokwe terrain, mean shear wave velocities of {le} 3.9 km/s characterize the lower part of the crust along with slightly ({approx}5 km) thinner crust. These findings indicate that the lower crust across much of the shield has a predominantly mafic composition, except for the southwest portion of the Kaapvaal Craton and western portion of the Zimbabwe Craton, where the lower crust is intermediate-to-felsic in composition. The parts of the Kaapvaal Craton underlain by intermediate-to-felsic lower crust coincide with regions where Ventersdorp rocks have been preserved, and thus we suggest that the intermediate-to-felsic composition of the lower crust and the shallower Moho may have resulted from crustal melting during the Ventersdorp tectonomagmatic event at c. 2.7 Ga and concomitant crustal thinning caused by rifting.
Development of the Robotic Touch foot Sensor for 2D walking Robot, for Studying Rough Terrain Locomotion
Lee, Hunwoo
Development of the Robotic Touch foot Sensor for 2D walking Robot, for Studying Rough Terrain Locomotion By HUNWOO LEE Submitted to the graduate degree program in Mechanical Engineering and the Graduate Faculty of the University of Kansas... ________________________________ Professor Robert Umholtz Date Defended: June 5, 2012 ii The Thesis Committee for HUNWOO LEE certifies that this is the approved version of the following thesis: Development of the Robotic Touch Foot Sensor for 2D Walking Robot...
Spotlight SAR interferometry for terrain elevation mapping and interferometric change detection
Eichel, P.H.; Ghiglia, D.C.; Jakowatz, C.V. Jr. [and others
In this report, we employ an approach quite different from any previous work; we show that a new methodology leads to a simpler and clearer understanding of the fundamental principles of SAR interferometry. This methodology also allows implementation of an important collection mode that has not been demonstrated to date. Specifically, we introduce the following six new concepts for the processing of interferometric SAR (INSAR) data: (1) processing using spotlight mode SAR imaging (allowing ultra-high resolution), as opposed to conventional strip-mapping techniques; (2) derivation of the collection geometry constraints required to avoid decorrelation effects in two-pass INSAR; (3) derivation of maximum likelihood estimators for phase difference and the change parameter employed in interferometric change detection (ICD); (4) processing for the two-pass case wherein the platform ground tracks make a large crossing angle; (5) a robust least-squares method for two-dimensional phase unwrapping formulated as a solution to Poisson`s equation, instead of using traditional path-following techniques; and (6) the existence of a simple linear scale factor that relates phase differences between two SAR images to terrain height. We show both theoretical analysis, as well as numerous examples that employ real SAR collections to demonstrate the innovations listed above.
Cite as: Lundquist, J.K., F. K. Chow, J. D. Mirocha, and K.A. Lundquist, 2007: An Improved WRF for Urban-Scale and Complex-Terrain Applications. American Meteorological Society's 7
Chow, Fotini Katopodes
method (IBM) approach to account for the effects of urban geometries and complex terrain. Companion of flow and dispersion in complex geometries such as urban areas, as well as new simulation capabilities for Urban-Scale and Complex-Terrain Applications. American Meteorological Society's 7 th Symposium
The Complexity of Rivers in Triangulated Terrains Pankaj Agarwal 1 Mark de Berg 2 Prosenjit Bose 3 Katrin Dobrint 2 Marc van Kreveld 2
Bose, Prosenjit
The Complexity of Rivers in Triangulated Terrains Pankaj Agarwal 1 Mark de Berg 2 Prosenjit Bose 3 \\Theta(n 3 ) worst�case complexity, where complexity is measured in the number of line segments that make into the stream. Road building, logging, or other activities carried out in a watershed all have the potential
Proceedings IEEE Visualization '99, pages 291298, cIEEE Computer Society Press, 1999. LOD-Sprite Technique for Accelerated Terrain Rendering
Swan II, J. Edward
-Sprite Technique for Accelerated Terrain Rendering Baoquan Chen� SUNY at Stony Brook J. Edward Swan II� Naval rendering technique, termed LOD-sprite render- ing, which uses a combination of a level-of-detail (LOD) represen- tation of the scene together with reusing image sprites (previously rendered images). Our primary
Terrain and vegetation structural influences on local avian species richness in two mixed-conifer forests
avian species richness in two mixed conifer forests, Moscow Mountain and Slate Creek, containing included height variability and canopy density whereas at Slate Creek they included slope, elevation, patch at Moscow Mountain but were strong predictors of avian species richness at the higher elevation Slate Creek
Placement of Traffic Barriers on Roadside and Median Slopes
Ferdous, Md Rubiat
on the findings obtained from crash tests performed on flat terrain. For barriers placed on roadside and median slopes, vehicle impact height varies depending on the trajectory of the vehicle along the ditch section and lateral offset of the barrier. Thus...
This study presents an adaptive solution to topographic feature extraction from digital terrain model. First, a slope
Shan, Jie
not directly support geospatial query and analysis. Finding interesting objects or features in DTM-based geospatial analysis such as dimension calculation and buffering. Finally, comparing with object precision drop in the adaptive method. Introduction Recent advances in geospatial data collection technology
Similarity Dimension of a Glaciated Terrain
Jackson, Daniel R.
rate of movement. #12;Data Acquisition � The topography of a formerly glaciated surface the proportionality constant b from the previous equation. #12;Application to Topography � The topography of a region, it becomes possible to evaluate the length and similarity dimension of topography as Richardson
Modles Numriques de Terrain Interpolation Numrique
Delacourt, Christophe
Scanner : http://www.riegl.com/ Scanner photogramm�trique : http://atm3d.free.fr/v5/html : Interf�rom�trie : SRTM (Shuttle Radar Topography Mission) : http://srtm.csi.cgiar.org Interf�rom�trie Radar multi
Pattern classification of terrain during amputee walking
Farrell, Matthew Todd
In this thesis I study the role of extrinsic (sensors placed on the body) versus intrinsic sensing (instruments placed on an artificial limb) and determine a robust set of sensors from physical and reliability constraints ...
Asynchronous deterministic rendezvous in bounded terrains$
Ilcinkas, David
. c LIF, Universit´e de Provence, 13453 Marseille, France. Abstract Two mobile agents (robots) have. Robots are modeled as points, and each of them is equipped with a compass. Compasses of robots may be incoherent. Robots construct their routes, but the actual walk of each robot is decided by the adversary
Side slope design based on human tolerance to vehicle response
Weaver, Graeme Douglas
an investigation of simulated vehicle response to the traversal of roadside terrain features. A Texas Transportation Institute adaptation of the CALSVA model was utilized to quantify the relative lateral, longitudinal, and vertical acceleration levels generated... by traversal of roadside cross-sections commonly employed in highway design. STUDY -SOCEDURS The principal aim of this research was to investigate the vehicle dynamic response during traversal of various roadside terrain featuzes to provide a basis...
Minimalistic Control of a Compass Gait Robot in Rough Terrain
Iida, Fumiya
Although there has been an increasing interest in dynamic bipedal locomotion for significant improvement of energy efficiency and dexterity of mobile robots in the real world, their locomotion capabilities are still mostly ...
Adaptive Resampling for Mobile, Real-Time Terrain
Mower, James E.
TinVariance scans the high-res TIN, searching for samples that exceed the variable local tolerance Scanning works about 3 minutes on a 700 mHz laptop #12;LocalTinVariance Speed Factors Worst-case performance is linear, triangular decomposition of a grid GridToTinVT adds a variable tolerance increasing with distance from
Ladkin, Peter B.
versus soft Fly-By-Wire (FBW) flight control systems. To obtain this data, simulated CFIT avoidance........................................................................................................................................2 B. Ground Proximity Warning Systems
High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone...
anomalies coincides with the mapped extent of several post-caldera rhyolitic lavas. Linear magnetic anomalies reflect the rectilinear fault systems characteristic of...
Ultrasensitive directional microphone arrays for military operations in urban terrain.
Hall, Neal A.; Peterson, Kenneth Allen; Parker, Eric Paul; Resnick, Paul James; Okandan, Murat; Serkland, Darwin Keith
Acoustic sensing systems are critical elements in detection of sniper events. The microphones developed in this project enable unique sensing systems that benefit significantly from the enhanced sensitivity and extremely compact foot-print. Surface and bulk micromachining technologies developed at Sandia have allowed the design, fabrication and characterization of these unique sensors. We have demonstrated sensitivity that is only available in 1/2 inch to 1 inch studio reference microphones--with our devices that have only 1 to 2mm diameter membranes in a volume less than 1cm{sup 3}.
Near Time-optimal Constrained Trajectory Planning on Outdoor Terrain
Sukhatme, Gaurav S.
interactions are usually unaccounted for. Kinodynamic planning in real-time is also difficult and currently
Topological Landscapes: A Terrain Metaphor for Scientific Data
Weber, Gunther H.; Bremer, Peer-Timo; Pascucci, Valerio
engine and nu- cleon datasets. In both cases considerations similar to those for the hydrogenengine dataset and the largest average error (error weighted by size of the area) is 1.4% for the hydrogen
Learning to visually predict terrain properties for planetary rovers
Brooks, Christopher Allen, 1978-
For future planetary exploration missions, improvements in autonomous rover mobility have the potential to increase scientific data return by providing safe access to geologically interesting sites that lie in rugged ...
Benthic Terrain Modeler: Interpreting the Bathymetric Environment Shaun Walbridge1
Wright, Dawn Jeannine
interactively with an environment such as IPython 6 . Finally, the project now includes an extensive testing
Resisting globalization- ATTAC in France: local discourses, global terrain
Leonard, Marie des Neiges
The debate over the "globalization" process has been influenced by the emergence of social movements who deplore this process. This research focuses on the French social movement ATTAC (Action for a Tobin Tax for the Aid of Citizens...
Intelligent terrain avoidance agent for General Aviation Free Flight
Gesting, Paul
In order to reduce the workload of Air Traffic Controllers, a new concept called Free Flight has emerged for General Aviation. This system takes the load off of the air traffic controller and puts the responsibility on the pilot. In order to help...
Soil Moisture Measurement in Heterogeneous Terrain Merlin, O.1
Walker, Jeff
, uncertainty assessment, soil moisture patterns. EXTENDED ABSTRACT Reliable soil moisture measurement over such data, portable electronic sensors offer a practical alternative to gravimetric measurements % v/v in clay. On the other hand, the real component of the measured relative DC is found to be more
Terrain relative localization for lunar entry, descent, and landing
Hale, Matthew J., S.M. Massachusetts Institute of Technology
As exploration of the solar system continues, the need for the capability to land a spacecraft very accurately on a planetary body has become apparent. Due to limitations on the achievable accuracy of inertial navigation ...
ASRS Database Report Set Controlled Flight Toward Terrain
be limited. The National Aeronautics and Space Administration and its ASRS current contractor, Booz Allen Hamilton, specifically disclaim any responsibility for any interpretation which may be made by others
Walking and Running of a Quadruped Robot on Irregular Terrain
Kimura, Hiroshi
-Communications Tokyo, Japan #12;2 Aichi Expo. Prototype Robot Exhib. Jun.9-19, 2005 House keeping dog in a garden (rush bound of the cyclic period of walking TomCat [Jul. 2003] #12;11 Passive Dynamic Walking A walking CPG? �passive dynamic walk �spring-damper neural system model (CPG + reflexes) passive dynamics
Mythical Terrain and the Building of Mexico�s UNAM
Davids, Ren�
and the Environment in Mexico, 2005. No. 14: Kevin P.Trueba, El Pedregal de San Angel. Mexico City: UniversidadNacional Aut�noma de Mexico (1995). 5. See Mario Pani and
High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to: navigation, search Name:HidraliaWells Geothermal
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer PlantMunhall,Missouri:EnergyOssian, New York:Ozark, Alabama:ASES 2003, Austin TX and
Outline DARTS lab Introduction SimScape Large terrain modeling CLOD visualization Conclusion Scalable Large, Multi-Resolution Terrain
-Time Simulation (DARTS) EDL simulations (DSENDS) Rover simulations (ROAMS) Airship simulations Robotic arm
Survey of Terrain Guarding and Art Gallery The terrain guarding problem and art gallery problem are two ar-
Krohn, Erik
show how this strategy has to be changed for molecules with a large hyperpolarizability. Finally, we 2
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary900Steep Slope Calculator Estimates Cooling and Heating
Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain
Ferrier, Ken
Bryan, K. , 1927. The �Palouse soil� problem. USGS Bulletinin the Channeled Scablands and Palouse of Washington State.dust-producing engine of the Palouse loess, USA. Quaternary
The coupled development of terrain and vegetation : the case of semiarid grasslands
Flores Cervantes, Javier Homero, 1977-
The distribution of vegetation in semiarid landscapes organizes as a function of moisture availability, which is often mediated by the form of the land surface. Simultaneously the processes that shape the land surface are ...
Optimal Complete Terrain Coverage using an Unmanned Aerial Vehicle Anqi Xu, Chatavut Viriyasuthee, and Ioannis Rekleitis
Rekleitis, Ioannis
in a bounded environment, while: · avoiding a set of obstacle regions with arbitrary shape · preventing from of coverage using an aerial vehicle has many applications, including: environmental inspection, search] for the general class of non-holonomic robots. We compute a set of waypoints outlining the desired cover- age path
Coastal Wave Generation and Wave Breaking over Terrain: Two Problems in Mesoscale Wave Dynamics�
Qian, Tingting
Two problems in mesoscale wave dynamics are addressed: (i) wave-turbulence interaction in a breaking mountain wave and (ii) gravity wave generation associated with coastal heating gradients. The mean and turbulent structures in a breaking mountain...
Measurement of advection and surface-atmosphere exchange in complex terrain.�
Jones, Kevin H.
Accurate observations of the carbon cycle are essential as inputs to global climate models. Observations made by the micrometeorological technique of eddy covariance, whist widespread, may be incorrect if air is advected ...
A Benthic Terrain Classification Scheme for American Samoa Accepted for publication in Marine Geodesy, 2006
Wright, Dawn Jeannine
, invasive species, security training activities, offshore oil and gas exploration, and coral bleaching on earth, continually face destruction from anthropogenic and natural threats. The U.S. Coral Reef Task to increasing coastal populations (Culliton 1998). Natural and anthropogenic processes threaten natural
Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain
Ferrier, Ken
kinetics. In: Reviews in Mineralogy. Vol. 31 of Developmentsthe tropical North Atlantic � Mineralogy. Marine Geology 37,and single-particle mineralogy of a thick Chinese loess-
all-terrain vehicle injuries: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
and efficiency can be observed depending on the size of compressors. Typically, a larger compressor results in higher fuel cell power density at the cost of fuel cell efficiency...
all-terrain vehicle accidents: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Accident Investigation 33 Nighttime Analysis 34 Before-and-After Study with Control Odds Ratio 34 35 Nighttime Investigation Results 40 Evaluation of Intersections with Zero...
all-terrain vehicle crashes: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
This strains electrical grid components, especially low-voltage transformers which can overheat and fail while serving consumers ' homes. Meanwhile, the EVs ' electrical storage...
The Inverting Effect of Curvature in Winter Terrain Park Jump Takeoffs J. A. McNeil
especially hazardous situation is when the jumper lands in an inverted position which can lead as "intrinsic" to snowboarding. The National Ski Areas Association reported approximately 16 million snowboarder
Low Altitude Wind Simulation Over Mount Saint Helens Using NASA SRTM Digital Terrain Model
Alberta, University of
. Using a new radar sweep- ing technique most of the Earth's surfaces was digitized in 3D in approximately Medellin, Colombia Edmonton, Alberta, Canada T6J 2E8 Abstract On February 11, 2000, the Shuttle Radar Topography Mis- sion (SRTM) was launched into space as part of one of the payload of the Shuttle Endeavor
Mapping textures on 3d terrains: a hybrid cellular automata approach�
Sinvhal, Swapnil
generated by cellular automata has been studied by Crutchfield et al. [16] and Melanie et al. [60], [61]. A ?chaotic? system has been described [99] as one in which ?activity doesn't die down into a regular pattern, but yet it also doesn't explode all... volumetric data structure to simulate weathering of stone incorporating effects like flow of moisture and mineral dissolution. Jensen et al. [62] illustrate the rendering of wet materials by taking into account the water on the surface and a concentration...
Estimating the spatial and temporal distribution of snow in mountainous terrain
Musselman, Keith Newton
beam radiation. At every photo / depth sensor location,2.4b but at all 24 photo / snow depth sensor locations isless than the photo-derived 24-sensor mean SVF 90� (0.24;
The chaotic terrain of Elysium Planitia, Mars: a mapping and geomorphic analysis
Roberts, Sara Layne
]. If an ice-rich permafrost exists, then geomorphic processes associated with frozen ground, such as frost heav- ing, ice or sand wedging, creep and patterned ground may also exist [Carr and Schaber, 1977; Lucchitta, 1981; Hel- fenstein, 1980; Nummedal... wedging and frost heaving [Anderson et al. , 1973; aossbacher and Judson, 1981; Wade and oe Wys, 1968; Sharp, 1973]. Thawing and sublimation of exposed ground ice may also explain the deep troughs [Carr and Schaber, 1977]. Additional mechanisms may...
Jake P. Gentle; Kurt S Myers; Tyler B Phillips; Inanc Senocak; Phil Anderson
Dynamic Line Rating (DLR) is a smart grid technology that allows the rating of power line to be based on real-time conductor temperature dependent on local weather conditions. In current practice overhead power lines are generally given a conservative rating based on worst case weather conditions. Using historical weather data collected over a test bed area, we demonstrate there is often additional transmission capacity not being utilized with the current static rating practice. We investigate a new dynamic line rating methodology using computational fluid dynamics (CFD) to determine wind conditions along transmission lines at dense intervals. Simulated results are used to determine conductor temperature by calculating the transient thermal response of the conductor under variable environmental conditions. In calculating the conductor temperature, we use both a calculation with steady-state assumption and a transient calculation. Under low wind conditions, steady-state assumption predicts higher conductor temperatures that could lead to curtailments, whereas transient calculations produce conductor temperatures that are significantly lower, implying the availability of additional transmission capacity.
Analysis, design, and control of an omnidirectional mobile robot in rough terrain
Udengaard, Martin Richard
An omnidirectional mobile robot is able, kinematically, to move in any direction regardless of current pose. To date, nearly all designs and analyses of omnidirectional mobile robots have considered the case of motion on ...
The research and design of a low cost, all terrain, mechanically advantageous wheelchair for developed markets
Judge, Benjamin Michael
This thesis presents a case for a paradigm shift in the way mobility technology is approached in the United States. Spawning from the research of developing world wheelchair technology, a conceptual design for a capable ...
Estimating the spatial and temporal distribution of snow in mountainous terrain
Musselman, Keith Newton
and McMillen, R.T. , 1984. Solar radiation within an oak--J.P. et al. , 2004. Solar radiation transmission through1992. Analysis of solar radiation data for Port Harcourt,
Submitted for Publication to SOLAR ENERGY PRODUCING SATELLITE-DERIVED IRRADIANCES IN COMPLEX ARID TERRAIN
Perez, Richard R.
Submitted for Publication to SOLAR ENERGY PRODUCING SATELLITE-DERIVED IRRADIANCES IN COMPLEX ARID spectrum. #12;Submitted for Publication to SOLAR ENERGY In its simplest description the model amounts wavelengths in the visible spectral range (0.55-0.75 µm) corresponding to the peak of the solar radiation
Calibration, Terrain Reconstruction and Path Planning for a Planetary Exploration System
Pollefeys, Marc
and localization of the rover. The lat- ter makes use of four Light Emitting Diodes on the rover payload cab
Surface Stresses and Turbulent Fluxes: Problems in Mesoscale Modeling over Terrain
: Turbulent mixing in breaking waves (Epifanio and Qian, 2008) LES for breaking mountain wave Flow past a hill) = Dx Ly (u, v, w) = Dy One kinematic condition (no flow through the boundary): w = u h x + v h y at the boundary and combine with the kinematic condition Lx ui,j,0 vi,j,0 wi,j,0 = f (Dx i,j , interior) , Ly
Parallelized Distributed Embedded Control System for 2D Walking Robot for Studying Rough Terrain Locomotion
Strunk, Gavin
C Bus��������������.31 3.3 Jaywalker GUI����������������������...38 4. JAYWALKER TESTING���������������������.41 4.1 Motor Ramping����������������������..41 4.2 Range of Motion����������������������42 4.3 Data Acquisition����������������������42... cylinders����������������������..53 Figure B.4.1: Propeller wiring diagram with EEPROM and connectors corresponding to the Sensor Controller connectors����������.54 Figure B.4.2: Regulator power source provided +3.3 VDC and +5 VDC for the Foot...
all-terrain lunar exploration: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
behind changes in the lunar exosphere when the Moon passes through the penumbra and umbra of the Earth during a lunar eclipse. The dusty turbulent environment due to planetary...
Online Submission ID: vis-1177 Analyzing Terrain Surfaces to Synthesize and Visualize
Bailey, Mike
abut each other, so that no land is wasted on gaps and no fuel is wasted on overlapping areas neural equation. A complete coverage tractor path is autonomously generated from the dynamic activity. If they are "too close" together, plowed areas of the field will overlap and waste fuel. Also, too much overlap
Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain
Ferrier, Ken
pit mine, and in 1948 a smelter was added to the site. It isor as finer particles in smelter stack emissions. We have
High compliance all-terrain transport and heavy cargo hybrid bicycle
Pino, Andres (Andres J.)
This research involved the design and manufacture of a prototype for a hybrid bicycle system. The design called for a vehicle capable of being used in a mode where normal bicycle operation is possible while being reconfigurable ...
High compliance all-terrain transport and heavy cargo hybrid bicycle
Soto-Fern�ndez, Orlando
A design project was carried out which involved the design, manufacturing, and assembly of a hybrid bicycle. The bicycle was required to operate between two modes, one that permitted fast transport of the operator from one ...
Coastal Wave Generation and Wave Breaking over Terrain: Two Problems in Mesoscale Wave Dynamics
Qian, Tingting
Two problems in mesoscale wave dynamics are addressed: (i) wave-turbulence interaction in a breaking mountain wave and (ii) gravity wave generation associated with coastal heating gradients. The mean and turbulent structures in a breaking mountain...
The effects of cultural noise on controlled source electromagnetic resonses of subsurface fractures in resistive terrain
Fernandes, Roland Anthony Savio
conductors such as metal fences and buried pipes. Cultural noise adds an element of complexity to the geological interpretation of this type of data. This research investigates the influence of mutual induction between two buried targets in a CSEM experiment...
The Great Circuit: Finding the Longest Great Circle With Respect to Terrain
French, Keith
at approximate 2 minute intervals (to match ETOPO 2 resolution). #0;9Using elevation data from ETOPO, calculate surface distance. #0;9Keep track of longest and shortest circles. #0;9Export circles as shapefiles. Results Sea Floor Results Sea Surface Sea...
Effects of climate, physical erosion, parent mineralogy, and dust on chemical erosion rates in mountainous terrain
Ferrier, Ken
Acta 40 (1), 41�49. Buss, H. L. , Bruns, M. A. , Schultz, M.Geobiology 3, 247�260. Buss, H. L. , Sak, P. B. , Webb, S.1025�1038. Fletcher, R. C. , Buss, H. L. , Brantley, S. L. ,
Live Webinar on the Funding Opportunity for Wind Forecasting Improvement Project in Complex Terrain
Broader source: Energy.gov [DOE]
On April 21, 2014 from 3:00 to 5:00 PM EST the Wind Program will hold a live webinar to provide information to potential applicants for this Funding Opportunity Announcement. There is no cost to...
Multicriteria design of rain gauge networks for flash flood prediction in semiarid catchments with complex terrain
Troch, Peter
events. Using weather radar observations and a dense network of 40 tipping bucket rain gauges, this studyMulticriteria design of rain gauge networks for flash flood prediction in semiarid catchments. [1] Despite the availability of weather radar data at high spatial (1 km2 ) and temporal (5�15 min
Analysis of flat terrain for the Atlas robot Maarten de Waard, Maarten Inja, and Arnoud Visser
Visser, Arnoud
of a humanoid can be placed. This will allow apply such robot in a rescue scenario, as foreseen in the DARPA, human-engineered environ- ments. Competitors in the DRC are expected to focus on robots that can use is the Atlas, a bipedal human sized robot, shown in figure 1. The Atlas robot is a continuation
Mathematics ON SLOPE GENERA OF
Ni, Yi
Pacific Journal of Mathematics ON SLOPE GENERA OF KNOTTED TORI IN 4-SPACE YI LIU, YI NI, HONGBIN, HONGBIN SUN AND SHICHENG WANG We investigate genera of slopes of a knotted torus in the 4-sphere analogous. 117 #12;118 YI LIU, YI NI, HONGBIN SUN AND SHICHENG WANG from the torus to the 4-sphere. By slightly
North Slope (Wahluke Slope) expedited response action cleanup plan
Not Available
The purpose of this action is to mitigate any threat to public health and the environment from hazards on the North Slope and meet the expedited response action (ERA) objective of cleanup to a degree requiring no further action. The ERA may be the final remediation of the 100-I-3 Operable Unit. A No Action record of decision (ROD) may be issued after remediation completion. The US Department of Energy (DOE) currently owns or administers approximately 140 mi{sup 2} (about 90,000 acres) of land north and east of the Columbia River (referred to as the North Slope) that is part of the Hanford Site. The North Slope, also commonly known as the Wahluke Slope, was not used for plutonium production or support facilities; it was used for military air defense of the Hanford Site and vicinity. The North Slope contained seven antiaircraft gun emplacements and three Nike-Ajax missile positions. These military positions were vacated in 1960--1961 as the defense requirements at Hanford changed. They were demolished in 1974. Prior to government control in 1943, the North Slope was homesteaded. Since the initiation of this ERA in the summer of 1992, DOE signed the modified Hanford Federal Agreement and Consent Order (Tri-Party Agreement) with the Washington Department of Ecology (Ecology) and the US Environmental Protection Agency (EPA), in which a milestone was set to complete remediation activities and a draft closeout report by October 1994. Remediation activities will make the North Slope area available for future non-DOE uses. Thirty-nine sites have undergone limited characterization to determine if significant environmental hazards exist. This plan documents the results of that characterization and evaluates the potential remediation alternatives.
Rock Slopes from Mechanics to Decision Making
Einstein, Herbert H.
Rock slope instabilities are discussed in the context of decision making for risk assessment and management. Hence, the state of the slope and possible failure mechanism need to be defined first. This is done with geometrical ...
Biocorrosive Thermophilic Microbial Communities in Alaskan North Slope Oil Facilities
Duncan, Kathleen E.
in Alaskan North Slope Oil Facilities Kathleen E. Duncan,in Alaskan North Slope oil production facilities. Title:in Alaskan North Slope Oil Facilities Authors: Kathleen E.
EuroCG 2010, Dortmund, Germany, March 2224, 2010 Guarding 1.5D Terrains with Demands
Matijevic, Domagoj
, Croatia, domagoj AT mathos.hr Department of Mathematics, J.J. Strossmayer University, Osijek, Croatia
Immersed Boundary Methods for High-Resolution Simulation of Atmospheric Boundary-Layer Flow Over Complex Terrain
Lundquist, Katherine Ann
laminar flow over a ribbed channel. v ? U n F = + U � ?U + ?dimensional channel flow with smooth and ribbed surfaces. In
New active safety device dedicated to light all-terrain vehicle stability: Application to quad bike and off-road
Boyer, Edmond
. It consists in using Predictive Functional Control (PFC) so as to compute, on-line, the maximum vehicle and braking control [3] and [2]), they appear to be poorly relevant for fast off-road motion context (since]. It consists in the on-line adaptation of tire cornering stiffnesses, representative of grip conditions, based
Conductive incubation and the origin of dome-and-keel structure in Archean granite-greenstone terrains
Sandiford, Mike
Conductive incubation and the origin of dome-and-keel structure in Archean granite August 2003; accepted 24 October 2003; published 27 January 2004. [1] The Archean East Pilbara Granite duration, following the burial of radiogenic granitic crust beneath the accumulated greenstone pile
DETENTE PAR SAIGNEE DE VOffiS PROFONDES: UNE METHODE EFFICACE POUR LA LUTTE CONTRE LES COUPS DE TERRAINS
Boyer, Edmond
heavage m deep coal mines may be alleviated using extensive floor slottmg before mining operadons Start be produced before the seam is worked. Subsequently die slot is monitored over dme to assess its effecdveness
Interactive Mapping on Virtual Terrain Models Tony Bernardin Eric Cowgill Ryan Gold Bernd Hamann Oliver Kreylos Alfred Schmitt
Hamann, Bernd
in the creation and interpretation of geologic/neotectonic maps at length scales of 10 m to 1000 km. Our system to measure the orientations of geologic surfaces and record their observations by drawing lines directly and displayed to facilitate understanding of the three-dimensional geometry of geologic surfaces. The main
Funneling Algorithms for Multi-Scale Optimization on Rugged Terrains Angelo Lucia*, Peter A. DiMaggio and Praveen Depa
Lucia, Angelo
for estimating binary interaction parameters for the Non- Random Two-Liquid (NRTL) equation for activity
Immersed Boundary Methods for High-Resolution Simulation of Atmospheric Boundary-Layer Flow Over Complex Terrain
Lundquist, Katherine Ann
large-eddy simulations within mesoscale simulations for windEddy Simulation of a Mesoscale Convective Internal Boundary185, 1957. Pielke, R. , Mesoscale Meteorological Modeling,
Large eddy simulation of atmospheric boundary layer flow in urban terrain : implications for transport of pollution and heat
Sun, Long
When the convection heat transfer model is well validated,models, convection heat transfer model is often over-and a convection heat transfer model with local accuracy is
Large eddy simulation of atmospheric boundary layer flow in urban terrain : implications for transport of pollution and heat
Sun, Long
losses of a flat-plate collector, Solar Energy 35, 15�19.from outer cover of solar collectors, Renew. Energ. 10 (4)
Sesso Temtica: Aplicaes Geolgicas e Geomorfolgicas de Anlise Digital de Terreno (Geological and Geomorphological Applications of Digital Terrain Analysis)
suas relações espaciais. A Análise Digital de Terreno, ou geomorfometria, fornece a base para dados geofísicos. Esta sessão será uma excelente oportunidade para apresentar e discutir os avanços mais de dados levantados por VANTs - a experiência do DNPM Dra. Cristina Bicho (DNPM) 11:10 12:00 Projeto
Unstable Wave Modes Over Complex Terrain Craig C. Epifanio1, David J. Muraki and Youngsuk Lee2
the Linear Instability Modes Three peaks, Nh/U = 0.5 color: disturbance � lines: Long's � Begin with steady Long's solution � Linearize model about Long's basic flow � Add random noise field � Allow disturbance modes to grow from noise #12;Growing the Linear Instability Modes Getting the growth rate and frequency
Isolating Effects of Water Table Dynamics, Terrain, and Soil Moisture Heterogeneity on the Atmospheric Boundary Layer Using Coupled Models
Rihani, Jehan
boundary conditions of wind, potential temperature, andvariables such as winds, potential temperature, rainfall,variables such as wind speed, potential temperature, and
Antonio Diaz-Calderon Jet Propulsion Laboratory
Kelly, Alonzo
@jpl.nasa.gov Alonzo Kelly The Robotics Institute Carnegie Mellon University On-Line Stability Margin and Attitude which move heavy loads, accelerate or brake aggressively, turn at speed, or operate on sloped terrain
Assessing the frictional and baroclinic contributions to stratified wake formation: a parameter space study
Smith, Jamie Brooke
of the - parameter space, including both unstratified ( = 0) and highly stratified ( = 4) flows and for terrain slopes characteristic of both geophysical ( = 0.1) and laboratory scale ( = 2.0) obstacles. Simulations both with and without applied surface stresses...
Design of a Helicopter Deployable Ground Robotic System for Hazardous Environments
Kochersberger, Kevin
/terrain interaction model to compute the cost of path traversal. In the CONOPS, the terrain model is generated real
Environmental Remediation program to perform slope-side cleanup...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Perform slope-side cleanup Environmental Remediation program to perform slope-side cleanup near Smith's Marketplace Los Alamos National Laboratory is performing a high-angle...
Decision guide for roof slope selection
Sharp, T.R.; Wendt, R.L.; McCorkle, J.E.
This decision guide has been written for personnel who are responsible for the design, construction, and replacement of Air Force roofs. It provides the necessary information and analytical tools for making prudent and cost-effective decisions regarding the amount of slope to provide in various roofing situations. Because the expertise and experience of the decision makers will vary, the guide contains both basic slope-related concepts as well as more sophisticated technical data. This breadth of information enables the less experienced user to develop an understanding of roof slope issues before applying the more sophisticated analytical tools, while the experienced user can proceed directly to the technical sections. Although much of this guide is devoted to the analysis of costs, it is not a cost-estimating document. It does, however, provide the reader with the relative costs of a variety of roof slope options; and it shows how to determine the relative cost-effectiveness of different options. The selection of the proper roof slope coupled with good roof design, a quality installation, periodic inspection, and appropriate maintenance and repair will achieve the Air Force's objective of obtaining the best possible roofing value for its buildings. 21 refs., 17 figs., 10 tabs.
LYCEN 9721 May 1997 LOCAL NUCLEAR SLOPE and CURVATURE
Boyer, Edmond
LYCEN 9721 May 1997 LOCAL NUCLEAR SLOPE and CURVATURE in HIGH ENERGY pp and ¯pp ELASTIC SCATTERING The local nuclear slope B(s, t) = d dt ln dn(s,t) dt is reconstructed from the exper- imental angular agreement with the (non fitted) slope data, in particular for the evolution of B(s, t) with s as a function
North Slope action holds West Coast spotlight
Wilson, H.M.
The first oil from a North Slope reservoir outside Prudhoe Bay will begin flowing next year at rate of 80,000 bpd from Kuparuk field now under development by Atlantic Richfield Co. west of Prudhoe Bay. Just north of the Kuparuk development, Conoco Inc. has found a commercial reservoir in the Milne Point unit and will be drilling confirmation and delineation wells later this year and in 1982. Another area which very likely will be developed for production is located northeast of Prudhoe Bay, where Sohio Alaska Petroleum Co. has announced discoveries in 2 Sag Delta wells. In California's San Joaquin Valley, 3 Kern County fields - South Belridge, Elk Hills, and Lost Hills - are the sites of intensive drilling. Seven rigs are working in the Santa Barbara Channel, 3 of them developing known fields from permanent platforms.
alaskan north slope: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
response Geosciences Websites Summary: wind field Mountain et al., 1976; Aagaard and Roach, 1990. This led Mountain et al. 1976 to suggest the Beaufort slope, Aagaard and...
Biocorrosive Thermophilic Microbial Communities in Alaskan North Slope Oil Facilities
Duncan, Kathleen E.
in Alaskan North Slope oil production facilities. Title:Profiling Despite oil production from several major16) was isolated from oil-production water and has optimal
Les expriences de laboratoire permettent-elles de prvoir le transport de HAP et de mtaux l'chelle du lysimtre de terrain ?
Boyer, Edmond
a g�n�r� de vastes superficies de friches pollu�es par des hydrocarbures lourds (de type Hydrocarbures particulier par des Hydrocarbures Aromatiques Polycycliques (HAP), des m�taux, de l'arsenic et du cyanure
Analysis of wind shear models and trends in different terrains M.L. Ray *, A.L. Rogers, and J.G. McGowan
Massachusetts at Amherst, University of
of characterizing the wind shear at a given site for a utility scale wind turbine cannot be overemphasized. It is important to understand because it directly impacts the power available at different wind turbine hub heights and strongly influences the cyclic loading on the turbine blades. For decades, academic
Soil moisture in complex terrain: quantifying effects on atmospheric boundary layer flow and providing improved surface boundary conditions for mesoscale models
Daniels, Megan Hanako
74 ii Soil Moisture Sensors: Decagon ECH2O Capacitance133 A.10 Soil types corresponding to each75 Soil Moisture and Temperature Probe
A climatic basis for microrefugia: the influence of terrain S O L O M O N Z . D O B R O W S K I *
Dobrowski, Solomon
to understanding present day biotic response to anthropogenic warming (Noss, 2001; Pearson, 2006; Provan & Bennet; Provan & Bennet, 2008). The purported utilization of microrefugia has far- reaching implications
Soil moisture in complex terrain: quantifying effects on atmospheric boundary layer flow and providing improved surface boundary conditions for mesoscale models
Daniels, Megan Hanako
red indicates �water towers� generated by kinematic wavethe kinematic wave equation will begin to collect water onred indicates �water towers� generated by kinematic wave
IEEE TRANS. AEROSP. ELECTRON. SYST., VOL. 43, NO. 4, PP. 1617-1624, OCT. 2007 1617 Terrain-Based Simulation of IEEE 802.11a and b
De Leon, Phillip
path loss, coverage, and medium access control (MAC) throughput in a corporate office environment using for proximity wireless networks on the Martian surface. The radio frequency (RF) environment on the Martian), is found to be much more adversely affected in the multipath environment. The DEM-based simulation
Soil moisture in complex terrain: quantifying effects on atmospheric boundary layer flow and providing improved surface boundary conditions for mesoscale models
Daniels, Megan Hanako
groundwater, land-surface, and mesoscale atmospheric model-and modification of mesoscale circulations. , Mon. Wea.J. Davis, The effects of mesoscale surface heterogeneity on
Soil moisture in complex terrain: quantifying effects on atmospheric boundary layer flow and providing improved surface boundary conditions for mesoscale models
Daniels, Megan Hanako
direction, (b) wind speed, (c) potential temperature, and (Airport of potential temperature, wind speed, winderrors (bias) for potential temperature, wind speed, wind
LESSONS LEARNED FROM A LANDFILL SLOPE FAILURE INVOLVING GEOSYTNTHETICS Virginia L. Wilson: Geosynthetics: Lessons Learned from Failures International Geosynthetics Society editors J.P. Giroud, K.L. Soderman and G.P. Raymond November 12, 1998 #12;LESSONS LEARNED FROM A LANDFILL SLOPE FAILURE INVOLVING
Submit a Public Comment on The Atmosphere to Electrons (A2e)...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Forecasting Improvement Project in Complex Terrain Funding Opportunity Announcement for Wind Forecasting Improvement Project in Complex Terrain Air Force Announces Funding for...
Quantitative laboratory observations of internal wave reflection on ascending slopes
Dauxois, Thierry
a stratified fluid with an angle that is fixed with respect to gravity. Upon reflection on a sloping bed that for a fixed frequency, the direction in which energy propagates with respect to the horizontal, , is fixed
atlantic slope waters: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Ho, Mei Yung 2007-01-01 24 On alpha stable distribution of wind driven water surface wave slope CERN Preprints Summary: We propose a new formulation of the probability...
Slope stability of geosynthetic clay liner test plots
Daniel, D.E. [Univ. of Illinois, Urbana, IL (United States); Koerner, R.M. [Drexel Univ., Philadelphia, PA (United States). Geosynthetic Research Inst.; Bonaparte, R. [GeoSyntec Consultants, Atlanta, GA (United States); Landreth, R.E. [Landreth, (Robert E.), West Chester, OH (United States); Carson, D.A. [Environmental Protection Agency, Cincinnati, OH (United States); Scranton, H.B. [Haley and Aldrich, Boston, MA (United States)
Fourteen full-scale field test plots containing five types of geosynthetic clay liners (GCLs) were constructed on 2H:1V and 3H:1V slopes for the purpose of assessing slope stability. The test plots were designed to simulate typical final cover systems for landfills. Slides occurred in two of the 2H:1V test plots along interfaces between textured geomembranes and the woven geotextile components of internally reinforced GCLs. One additional slide occurred within the unreinforced GCL component of a 2H:1V test plot, when the GCL unexpectedly became hydrated. All 3H:1V slopes have remained stable. Results of laboratory direct shear tests compared favorably with field observations, providing support for the current design procedures that engineers are using for assessing the stability of slopes containing GCLs.
Linear and nonlinear stratified spindown over sloping topography
Benthuysen, Jessica A
In a stratified rotating fluid, frictionally driven circulations couple with the buoyancy field over sloping topography. Analytical and numerical methods are used to quantify the impact of this coupling on the vertical ...
Slope Error Measurement Tool for Solar Parabolic Trough Collectors: Preprint
Stynes, J. K.; Ihas, B.
The National Renewable Energy Laboratory (NREL) has developed an optical measurement tool for parabolic solar collectors that measures the combined errors due to absorber misalignment and reflector slope error. The combined absorber alignment and reflector slope errors are measured using a digital camera to photograph the reflected image of the absorber in the collector. Previous work using the image of the reflection of the absorber finds the reflector slope errors from the reflection of the absorber and an independent measurement of the absorber location. The accuracy of the reflector slope error measurement is thus dependent on the accuracy of the absorber location measurement. By measuring the combined reflector-absorber errors, the uncertainty in the absorber location measurement is eliminated. The related performance merit, the intercept factor, depends on the combined effects of the absorber alignment and reflector slope errors. Measuring the combined effect provides a simpler measurement and a more accurate input to the intercept factor estimate. The minimal equipment and setup required for this measurement technique make it ideal for field measurements.
Development of a new generation of optical slope measuring profiler
Yashchuk, Valeriy V.; Takacs, Peter Z.; McKinney, Wayne R.; Assoufid, Lahsen; Siewert, Frank; Zeschke, Thomas
A collaboration, including all DOE synchrotron labs, industrial vendors of x-ray optics, and with active participation of the HBZ-BESSY-II optics group has been established to work together on a new slope measuring profiler -- the optical slope measuring system (OSMS). The slope measurement accuracy of the instrument is expected to be<50 nrad for the current and future metrology of x-ray optics for the next generation of light sources. The goals were to solidify a design that meets the needs of mirror specifications and also be affordable; and to create a common specification for fabrication of a multi-functional translation/scanning (MFTS) system for the OSMS. This was accomplished by two collaborative meetings at the ALS (March 26, 2010) and at the APS (May 6, 2010).
The Interruption of Alpine Foehn by a Cold Front. Part I: Observations
Gohm, Alexander
propagation speed wf 1 m/s Inclination of the frontal surface is wf /uf 1/7.5 8� Freitag (1990 in valleys Interaction with local winds (e.g., foehn) foehn cold front Cold front in complex terrain ? ? #12 in Inn and Wipp Valley Temperature slope profile Doppler wind lidar in Wipp Valley #12;6 of 13 Case study
www.ext.vt.edu Produced by Communications and Marketing, College of Agriculture and Life Sciences, Virginia Polytechnic Institute and State University, 2014
Liskiewicz, Maciej
? ___________________ 7.SOIL: Type Terrain Drainage Soil-less Mulch q sandy q sloped q good q pinebark q bark chips q clay q level q moderate q peat moss q plastic q loam q low q poor q other _________q other _________ q
Settlement Prediction, Gas Modeling and Slope Stability Analysis
Polit�cnica de Catalunya, Universitat
Settlement Prediction, Gas Modeling and Slope Stability Analysis in Coll Card�s Landfill Li Yu using mechanical models Simulation of gas generation, transport and extraction in MSW landfill 1 models Simulation of gas generation, transport and extraction in MSW landfill 1) Analytical solution
Adverse Tunnelling Conditions Arising from Slope Instabilities A Case History
of the Hindustan-Tibet-Highway by a rock fall (LEFT). Rock slide at the dam site blocking the Satluj River (RIGHT) has been under con- struction. The project includes a 60.5 m high concrete gravity dam, an underground-side slopes. SURFACE INSTABILITIES Due to foliation parallel sliding planes and cross cutting orthogonal joint
Late Holocene Radiocarbon Variability in Northwest Atlantic Slope Waters
Sherwood, O; Edinger, E; Guilderson, T P; Ghaleb, B; Risk, M J; Scott, D B
Deep-sea gorgonian corals secrete a 2-part skeleton of calcite, derived from dissolved inorganic carbon at depth, and gorgonin, derived from recently fixed and exported particulate organic matter. Radiocarbon contents of the calcite and gorgonin provide direct measures of seawater radiocarbon at depth and in the overlying surface waters, respectively. Using specimens collected from Northwest Atlantic slope waters, we generated radiocarbon records for surface and upper intermediate water layers spanning the pre- and post bomb-{sup 14}C eras. In Labrador Slope Water (LSW), convective mixing homogenizes the pre-bomb {Delta}{sup 14}C signature (-67 {+-} 4{per_thousand}) to at least 1000 m depth. Surface water bomb-{sup 14}C signals were lagged and damped (peaking at {approx} +45{per_thousand} in the early 1980s) relative to other regions of the northwest Atlantic, and intermediate water signals were damped further. Off southwest Nova Scotia, the vertical gradient in {Delta}{sup 14}C is much stronger. In surface water, pre-bomb {Delta}{sup 14}C averaged -75 {+-} 5{per_thousand}. At 250-475 m depth, prebomb {Delta}{sup 14}C oscillated quasi-decadally between -80 and -100{per_thousand}, likely reflecting interannual variability in the presence of Labrador Slope Water vs. Warm Slope Water (WSW). Finally, subfossil corals reveal no systematic changes in vertical {Delta}{sup 14}C gradients over the last 1200 years.
Stress distribution and development within geosynthetic-reinforced soil slopes
Zornberg, Jorge G.
September 2011, accepted 2 December 2011 ABSTRACT: Numerical methods combined with centrifuge tests are used by centrifuge tests of two GRS slopes with different backfill densities. Numerical results indicate that soil, Centrifuge test REFERENCE: Yang, K.-H., Zornberg, J. G., Liu, C.-N. & Lin, H.-D. (2012). Stress distribution
MacDonald, Noel C.
BULK MICROMACHINED TITANIUM MICROMIRROR DEVICE WITH SLOPING ELECTRODE GEOMETRY Masa P. Rao1 , Marco micromachined hybrid torsional micromirror device composed of titanium mirror structures bonded to an underlying time, high aspect ratio micromachining capability in bulk titanium; and 2) the High Aspect Ratio
Slope stability and CCF The impact of forests and
. Road building and harvesting operations that are essential for forest management reduce the stabilizing of slope instability which are closely linked; surface erosion and landslides. Surface erosion is a water capacity, or ability to absorb and hold water (Schoenholtz et al., 2000). Surface flow is therefore rare
Centauri Dreams Imagining and Planning Interstellar Exploration
Arizona, University of
and steep terrain to explore them. Airships would be particularly useful in environments like Titan, where
Compiled Multi-Lab Geochemistry Synoptic Survey (LANL, ORNL, LBNL), Barrow, Alaska; 2012
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Brent Newman; Heather Throckmorton
To assess the effects of microtopography and depth on ground water geochemistry in arctic polygonal terrain.
Atmospheric Science: An introductory survey 1. Introduction to the atmosphere
Folkins, Ian
Sound Convergence Zone #12;Terrain effects #12;Von Karman vortex streets #12;Atmosphere in Earth system
TextureCam: A Smart Camera for Microscale, Mesoscale, and Deep Space Applications. David R. Thomp-, William Abbey2
Wagstaff, Kiri L.
rovers to interpret the sedimentology of the terrain en route, and could assist analyses by scientists
Ciovati, Gianluigi [JLAB
The performance of SRF cavities made of bulk Nb at high fields (peak surface magnetic field greater than about 90 mT) is characterized by exponentially increasing RF losses (high-field Q-slope), in the absence of field emission, which are often mitigated by a low temperature (100-140 �C, 12-48h) baking. In this contribution, recent experimental results and phenomenological models to explain this effect will be briefly reviewed. New experimental results on the high-field Q-slope will be presented for cavities that had been heat treated at high temperature in the presence of a small partial pressure of nitrogen. Improvement of the cavity performances have been obtained, while surface analysis measurements on Nb samples treated with the cavities revealed significantly lower hydrogen concentration than for samples that followed standard cavity treatments.
Materials Science Problems of the SCRF Q-Slope
Insepov, Z.; Norem, J.; Hassanein, A. [Argonne National Laboratory, Argonne, IL 60439 (United States); Swenson, D. R. [Epion Corporation, Billerica, MA 01821 (United States)
None of the existing theoretical models can explain all the observed features of the Q-slope. In the present work, we review this problem and show how Atom Probe Tomography and Gas Cluster Ion Beam smoothing can study the basic mechanisms that may be involved. The gas cluster ion beam (GCIB) treatment method has recently been proposed as a new way to significantly reduce the surface roughness and the dark current from the rf-cavity surfaces. In addition to the suppression of the dark current, GCIB might also be an important treatment for mitigation of the Q-slope in superconducting cavities. Niobium surface treatment by cluster ion irradiation was studied based on atomistic and mesoscopic simulation methods and the surface modification dynamics results were compared to experiments.
Kishore K. Mohanty
North Slope of Alaska has huge oil deposits in heavy oil reservoirs such as Ugnu, West Sak and Shrader Bluff etc. The viscosity of the last two reservoir oils vary from {approx}30 cp to {approx}3000 cp and the amount in the range of 10-20 billion barrels. High oil viscosity and low formation strength impose problems to high recovery and well productivity. Water-alternate-gas injection processes can be effective for the lower viscosity end of these deposits in West Sak and Shrader Bluff. Several gas streams are available in the North Slope containing NGL and CO{sub 2} (a greenhouse gas). The goal of this research is to develop tools to find optimum solvent, injection schedule and well-architecture for a WAG process in North Slope shallow sand viscous oil reservoirs. In the last quarter, we have developed streamline generation and convection subroutines for miscible gas injection. The WAG injection algorithms are being developed. We formulated a four-phase relative permeability model based on two-phase relative permeabilities. The new relative permeability formulations are being incorporated into the simulator. Wettabilities and relative permeabilities are being measured. Plans for the next quarter includes modeling of WAG injection in streamline based simulation, relative permeability studies with cores, incorporation of complex well-architecture.
North Slope Decision Support for Water Resource Planning and Management
Schnabel, William; Brumbelow, Kelly
The objective of this project was to enhance the water resource decision-making process with respect to oil and gas exploration/production activities on Alaska�s North Slope. To this end, a web-based software tool was developed to allow stakeholders to assemble, evaluate, and communicate relevant information between and amongst themselves. The software, termed North Slope Decision Support System (NSDSS), is a visually-referenced database that provides a platform for running complex natural system, planning, and optimization models. The NSDSS design was based upon community input garnered during a series of stakeholder workshops, and the end product software is freely available to all stakeholders via the project website. The tool now resides on servers hosted by the UAF Water and Environmental Research Center, and will remain accessible and free-of-charge for all interested stakeholders. The development of the tool fostered new advances in the area of data evaluation and decision support technologies, and the finished product is envisioned to enhance water resource planning activities on Alaska�s North Slope.
Comparison of slope stability in two Brazilian municipal landfills
Gharabaghi, B. [School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)], E-mail: email@example.com; Singh, M.K. [Department of Civil and Geological Engineering, University of Saskatchewan, Saskatoon, S7N 5A9 (Canada); Inkratas, C. [School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)], E-mail: email@example.com; Fleming, I.R. [Department of Civil and Geological Engineering, University of Saskatchewan, Saskatoon, S7N 5A9 (Canada)], E-mail: firstname.lastname@example.com; McBean, E. [School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)], E-mail: firstname.lastname@example.com
The implementation of landfill gas to energy (LFGTE) projects has greatly assisted in reducing the greenhouse gases and air pollutants, leading to an improved local air quality and reduced health risks. The majority of cities in developing countries still dispose of their municipal waste in uncontrolled 'open dumps.' Municipal solid waste landfill construction practices and operating procedures in these countries pose a challenge to implementation of LFGTE projects because of concern about damage to the gas collection infrastructure (horizontal headers and vertical wells) caused by minor, relatively shallow slumps and slides within the waste mass. While major slope failures can and have occurred, such failures in most cases have been shown to involve contributory factors or triggers such as high pore pressures, weak foundation soil or failure along weak geosynthetic interfaces. Many researchers who have studied waste mechanics propose that the shear strength of municipal waste is sufficient such that major deep-seated catastrophic failures under most circumstances require such contributory factors. Obviously, evaluation of such potential major failures requires expert analysis by geotechnical specialists with detailed site-specific information regarding foundation soils, interface shearing resistances and pore pressures both within the waste and in clayey barrier layers or foundation soils. The objective of this paper is to evaluate the potential use of very simple stability analyses which can be used to study the potential for slumps and slides within the waste mass and which may represent a significant constraint on construction and development of the landfill, on reclamation and closure and on the feasibility of a LFGTE project. The stability analyses rely on site-specific but simple estimates of the unit weight of waste and the pore pressure conditions and use 'generic' published shear strength envelopes for municipal waste. Application of the slope stability analysis method is presented in a case study of two Brazilian landfill sites; the Cruz das Almas Landfill in Maceio and the Muribeca Landfill in Recife. The Muribeca site has never recorded a slope failure and is much larger and better-maintained when compared to the Maceio site at which numerous minor slumps and slides have been observed. Conventional limit-equilibrium analysis was used to calculate factors of safety for stability of the landfill side slopes. Results indicate that the Muribeca site is more stable with computed factors of safety values in the range 1.6-2.4 compared with computed values ranging from 0.9 to 1.4 for the Maceio site at which slope failures have been known to occur. The results suggest that this approach may be useful as a screening-level tool when considering the feasibility of implementing LFGTE projects.
Los Alamos Lab to perform slope-side cleanup near Smith's Marketplace
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Los Alamos Lab to perform slope-side cleanup near Smith's Marketplace Los Alamos National Laboratory to perform slope-side cleanup near Smith's Marketplace The Lab is performing a...
Quantifying subaqueous slope stability during seismic shaking: Lake Lucerne as model for ocean margins
Gilli, Adrian
Quantifying subaqueous slope stability during seismic shaking: Lake Lucerne as model for ocean-deltaic lateral slopes in perialpine, fjord-type Lake Lucerne (Central Switzerland); (ii) their control
ORIGINAL RESEARCH PAPER Mapping basin-wide subaquatic slope failure susceptibility
Gilli, Adrian
Science+Business Media B.V. 2010 Abstract This study of subaquatic slope failures in Lake Lucerne, central. Keywords Submarine landslides � Slope stability � Limit equilibrium � Paleoseismology � Lake Lucerne
Slope stability analysis by nite elements D. V. GRIFFITHS and P. A. LANE{
, regarding the failure mechanism. Slope failure in the �nite element model occurs `naturally' through methods, including the in�uence of a free surface on slope and dam stability. Graphical output is included to illustrate defor- mations and mechanisms of failure. It is argued that the �nite element method of slope
PVT Compensation for Wilkinson Single-Slope Measurement Systems
Britton Jr, Charles L [ORNL; Ericson, Milton Nance [ORNL; Blalock, Benjamin [University of Tennessee, Knoxville (UTK); Tham, Kevin [Intel Corporation; Ulaganathan, Chandradevi [University of Tennessee, Knoxville (UTK); Greenwell, Robert E [ORNL; Holleman, Jeremy [University of Tennessee, Knoxville (UTK)
A pulse-width locked loop (PWLL) circuit is reported that compensates for process, voltage, and temperature (PVT) variations of a linear ramp generator within a 12-bit multi-channel Wilkinson (single-slope integrating) Analog-to-Digital (ADC). This PWLL was designed and fabricated in a 0.5- m Silicon Germanium (SiGe) BiCMOS process. Simulation and silicon measurement data are shown that demonstrate a large improvement in the accuracy of the PVT-compensated ADC over the uncompensated ADC.
West Slope, Oregon: Energy Resources | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTown ofNationwideWTED JumpHills, New York: EnergyMountain,PuenteSimsbury,Slope,
The 2004 North Slope of Alaska Arctic Winter Radiometric Experiment
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructureProposedPAGESafetyTed Donat AboutTextiles2004 North Slope of
Precision Tiltmeter as a Reference for Slope MeasuringInstruments
Kirschman, Jonathan L.; Domning, Edward E.; Morrison, Gregory Y.; Smith, Brian V.; Yashchuk, Valeriy V.
The next generation of synchrotrons and free electron lasers require extremely high-performance x-ray optical systems for proper focusing. The necessary optics cannot be fabricated without the use of precise optical metrology instrumentation. In particular, the Long Trace Profiler (LTP) based on the pencil-beam interferometer is a valuable tool for low-spatial-frequency slope measurement with x-ray optics. The limitations of such a device are set by the amount of systematic errors and noise. A significant improvement of LTP performance was the addition of an optical reference channel, which allowed to partially account for systematic errors associated with wiggling and wobbling of the LTP carriage. However, the optical reference is affected by changing optical path length, non-homogeneous optics, and air turbulence. In the present work, we experimentally investigate the questions related to the use of a precision tiltmeter as a reference channel. Dependence of the tiltmeter performance on horizontal acceleration, temperature drift, motion regime, and kinematical scheme of the translation stage has been investigated. It is shown that at an appropriate experimental arrangement, the tiltmeter provides a slope reference for the LTP system with accuracy on the level of 0.1 {micro}rad (rms).
Research on the seasonal snow of the Arctic Slope
Benson, C.S.
The original objectives of this research included a regional study of snow on the entire Arctic Slope. During the first year the scope was restricted to the R{sub 4}D area. In the second and third years the primary focus was also on the R{sub 4}D area,but measurements were made at Prudhoe Bay, Atgasuk and Wainwright to determine the flux of wind-blown snow on a wider scale. Additional broadening of scope was discussed at the San Diego R{sub 4}D meetings in April 1986 and 1987 and at the extrapolation workshop held at Penn State University in Spring 1987. The broadening of scope has also included detailed studies of chemistry and controls exerted by large-scale advection of air masses on the longwave, thermal IR, and radiation. The latter phenomena are critical in initiating snowmelt.
Biocorrosive Thermophilic Microbial Communities in Alaskan North Slope Oil Facilities
Duncan, Kathleen E.; Gieg, Lisa M.; Parisi, Victoria A.; Tanner, Ralph S.; Green Tringe, Susannah; Bristow, Jim; Suflita, Joseph M.
Corrosion of metallic oilfield pipelines by microorganisms is a costly but poorly understood phenomenon, with standard treatment methods targeting mesophilic sulfatereducing bacteria. In assessing biocorrosion potential at an Alaskan North Slope oil field, we identified thermophilic hydrogen-using methanogens, syntrophic bacteria, peptideand amino acid-fermenting bacteria, iron reducers, sulfur/thiosulfate-reducing bacteria and sulfate-reducing archaea. These microbes can stimulate metal corrosion through production of organic acids, CO2, sulfur species, and via hydrogen oxidation and iron reduction, implicating many more types of organisms than are currently targeted. Micromolar quantities of putative anaerobic metabolites of C1-C4 n-alkanes in pipeline fluids were detected, implying that these low molecular weight hydrocarbons, routinely injected into reservoirs for oil recovery purposes, are biodegraded and provide biocorrosive microbial communities with an important source of nutrients.
The slopes determined by n points in the plane
Martin, Jeremy L.
field k,andletG be a graph with vertices V and edges E.Apicture P of G consists of a point P(v)for each vertex and a line P(e) for each edge, subject to the condition that P(v) ? P(e) whenever v is an endpoint of e.Thusthedataofn points and parenleftbig... of generic pictures is called the picture variety V(G). This is an irreducible component of X(G) of dimension 2|V |. Passing to an affine open subset � V(G) ? V(G) and projecting onto an affine space A |E| k whose coordinates correspond to the slopes of lines...
Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler
Yashchuk, Valeriy V; Barber, Samuel; Domning, Edward E.; Kirschman, Jonathan L.; Morrison, Gregory Y.; Smith, Brian V; Siewert, Frank; Zeschke, Thomas; Geckeler, Ralf; Just, Andreas
A new low budget slope measuring instrument, the Developmental Long Trace Profiler (DLTP), was recently brought to operation at the ALS Optical Metrology Laboratory. The design, instrumental control and data acquisition system, initial alignment and calibration procedures, as well as the developed experimental precautions and procedures are described in detail. The capability of the DLTP to achieve sub-microradian surface slope metrology is verified via cross-comparison measurements with other high performance slope measuring instruments when measuring the same high quality test optics. The directions of future work to develop a surface slope measuring profiler with nano-radian performance are also discussed.
Kishore K. Mohanty
North Slope of Alaska has huge oil deposits in heavy oil reservoirs such as Ugnu, West Sak and Shrader Bluff etc. The viscosity of the last two reservoir oils vary from {approx}30 cp to {approx}3000 cp and the amount in the range of 10-20 billion barrels. High oil viscosity and low formation strength impose problems to high recovery and well productivity. Water-alternate-gas injection processes can be effective for the lower viscosity end of these deposits in West Sak and Shrader Bluff. Several gas streams are available in the North Slope containing NGL and CO{sub 2} (a greenhouse gas). The goal of this research is to develop tools to find optimum solvent, injection schedule and well-architecture for a WAG process in North Slope shallow sand viscous oil reservoirs. Coreflood, quarter 5-spot study, compositional simulation, wettability, relative permeability study and streamline-based simulation were conducted in this project. 1D compositional simulation results agree reasonably well with those of the slim tube experiments. Injection of CO{sub 2}-NGL is preferable over that of PBG-NGL. MME is sensitive to pressure (in the range of 1300-1800 psi) for the injection of PBG-NGL, but not for CO{sub 2}-NGL. Three hydrocarbon phases form in this pressure range. As the mean thickness of the adsorbed organic layer on minerals increases, the oil-water contact angle increases. The adsorbed organic films left behind after extraction of oil by common aromatic solvents used in core studies, such as toluene and decalin, are thinner than those left behind by non-aromatic solvents, such as cyclohexane. The force of adhesion for minerals aged with just the asphaltene fraction is similar to that of the whole oil implying that asphaltenes are responsible for the mixed-wettability in this reservoir. A new relative permeability model for a four-phase, mixed-wet system has been proposed. A streamline module is developed which can be incorporated in an existing finite-difference based compositional simulator to model water flood, gas flood and WAG flood. Horizontal wells increase well deliverability over vertical wells, but sweep efficiency can decrease. The well performance depends on the well length, position, heterogeneity, and viscosity ratio. The productivity increase due to electromagnetic heating is a function of power intensity, flow rate, and frequency etc. The productivity of a well can be doubled by electromagnetic heating. A high-pressure quarter 5-spot model has been constructed to evaluate the sweep efficiency of miscible WAG floods. WAG displacement reduces bypassing compared to gas floods and improves oil recovery in cores. As the WAG ratio decreased and slug size increased, oil recovery increased. Oil was recovered faster with increased slug size and decreased WAG ratio in the simulations for field cases studied.
BACK-ANALYSES OF LANDFILL SLOPE FAILURES Nejan Huvaj-Sarihan Timothy D. Stark
BACK-ANALYSES OF LANDFILL SLOPE FAILURES Nejan Huvaj-Sarihan Timothy D. Stark University strength of MSW. The back-analysis of failed waste slopes in the Gnojna Grora landfill in Poland, Istanbul Landfill in Turkey, Hiriya Landfill in Israel, and Payatas Landfill in Philippines are presented
Control of a Mobile Modular Manipulator Moving on a Slope Yangmin Li, Yugang Liu
Li, Yangmin
Control of a Mobile Modular Manipulator Moving on a Slope Yangmin Li, Yugang Liu Department. An effective control method is applied to the ntobile mudular manipulator control in case of moving on a slope mobile basis and manipulator were studied in [I]. A hybrid control idea was presented for robot control
Stability Charts for Uniform Slopes Radoslaw L. Michalowski, F.ASCE1
Michalowski, Radoslaw L.
. Charts are presented for slopes subjected to pore water pressure and also for those exposed to seismic analysis; Limit states; Failures; Graphic methods. Introduction Stability assessments of earth slopes require limit state calcula- tions, which differ significantly from those in structural engineer- ing
Evaluation of a CCD-based high resolution autocollimator for use as a slope sensor
Baltisberger, Jay H.
Evaluation of a CCD-based high resolution autocollimator for use as a slope sensor Rohan Isaac the focused beam profile to broaden and decrease its peak intensity Project: Evaluation of a compact CCD-based high resolution autocollimator with a small probe beam for potential use as a slope sensor Optics Group
Soatto, Stefano
THIN FILM EPITAXY WITH OR WITHOUT SLOPE SELECTION BO LI AND JIAN-GUO LIU Abstract. Two nonlinear diffusion equations for thin film epitaxy, with or without slope se- lection, are studied in this work = - � h 1 + | h|2 + h (1.1) and th = - � 1 - | h|2 h + h (1.2) that model epitaxial growth of thin films
Northsouth topographic slope asymmetry on Mars: Evidence for insolation-related erosion at high obliquity
Head III, James William
asymmetry. Specifically, we suggest that summertime melting of ground ice on pole-facing slopes occurred, asymmetric troughs in the polar cap deposits of Mars have been interpreted to be due to insolation derived from the gridded topo- graphic map are affected by strongly anisotropic errors. The slopes along
Economics of Alaska North Slope gas utilization options
Thomas, C.P.; Doughty, T.C.; Hackworth, J.H.; North, W.B.; Robertson, E.P.
The recoverable natural gas available for sale in the developed and known undeveloped fields on the Alaskan North Slope (ANS) total about 26 trillion cubic feet (TCF), including 22 TCF in the Prudhoe Bay Unit (PBU) and 3 TCF in the undeveloped Point Thomson Unit (PTU). No significant commercial use has been made of this large natural gas resource because there are no facilities in place to transport this gas to current markets. To date the economics have not been favorable to support development of a gas transportation system. However, with the declining trend in ANS oil production, interest in development of this huge gas resource is rising, making it important for the U.S. Department of Energy, industry, and the State of Alaska to evaluate and assess the options for development of this vast gas resource. The purpose of this study was to assess whether gas-to-liquids (GTL) conversion technology would be an economic alternative for the development and sale of the large, remote, and currently unmarketable ANS natural gas resource, and to compare the long term economic impact of a GTL conversion option to that of the more frequently discussed natural gas pipeline/liquefied natural gas (LNG) option. The major components of the study are: an assessment of the ANS oil and gas resources; an analysis of conversion and transportation options; a review of natural gas, LNG, and selected oil product markets; and an economic analysis of the LNG and GTL gas sales options based on publicly available input needed for assumptions of the economic variables. Uncertainties in assumptions are evaluated by determining the sensitivity of project economics to changes in baseline economic variables.
Mesoscale Characterization of Coupled Hydromechanical Behavior of a Fractured Porous Slope in Response to Free Water-Surface Movement
Guglielmi, Y.
Mesoscale Characterization of Coupled Hydromechanicalinstrumented for mesoscale hydraulic and mechanicalwords: Fracture; Rock slope; Mesoscale; In situ poroelastic
Prescribed Range Burning in Texas
White, Larry D.; Hanselka, C. Wayne
to level terrain. Wind is chan- neled up canyons with increasing speed. In addition, wind in valleys and on slopes moves upward during the day because of surface heating and downward at night because of surface cooling unless prevailing winds are strong... under the canopy of a shrub or tree to generate the necessary heat to kill plant tissue. Mechanically cleared firelines and roads in brush or trees create openings that produce unusual wind movements. Figure 2. Prevailing wind direction depends...
Geotechnical in situ characterization of subaquatic slopes: The role of pore pressure transients versus frictional strength in landslide
Gilli, Adrian
-triggered slope deposits in Lake Lucerne (Switzerland) in addition to geophysical characterization and laboratory-induced subaquatic slope failure in Lake Lucerne (Switzerland) using in situ vane shear and Cone Penetrating Testing- overdeepened Lake Lucerne, central Switzerland (Figure 1). A detailed description of the slope and sediment
Optimization of central receiver concentrated solar thermal : site selection, heliostat layout & canting
Noone, Corey J. (Corey James)
In this thesis, two new models are introduced for the purposes of (i) locating sites in hillside terrain suitable for central receiver solar thermal plants and (ii) optimization of heliostat field layouts for any terrain. ...
Design of robotic quadruped legs
McKenzie, Jacob Elijah
Prized for their performance on prepared surfaces, wheeled vehicles are often limited in mobility by rough and unstructured terrain. Conversely, systems that rely on legs have shown promising rough terrain performance but ...
UBC Social Ecological Economic Development Studies (SEEDS) Student Report Travis Wade
GRYPHON: LCA of electric vs. diesel all-terrain vehicles CEEN 523 December 11, 2013 999 1453 University, Development Studies (SEEDS) Student Report PROJECT GRYPHON: LCA of electric vs. diesel all-terrain vehicles ............................................................................................. 7 3 Diesel Vehicle
Buttz, James H. (Albuquerque, NM); Shirey, David L. (Albuquerque, NM); Hayward, David R. (Albuquerque, NM)
A robotic vehicle system for terrain navigation mobility provides a way to climb stairs, cross crevices, and navigate across difficult terrain by coupling two or more mobile robots with a coupling device and controlling the robots cooperatively in tandem.
Goldman, Daniel I.
robotic locomotors like PackBot or RHex (Figure 1a) travel across these "flowable" types of terrain [1]). Figure 1 Natural heterogeneous terrain. (a) RHex robot traveling across heterogeneous gravel substrate
Evolution of depositional and slope instability processes on Bryant Canyon area, Northwest Gulf of Mexico�
Tripsanas, Efthymios
. At about 11 ky B.P. the melt water discharges of the North America switched from Mississippi River to St Lawrence Seaway, causing the domination of hemipelagic sedimentation on the continental slope of the northwest Gulf of Mexico....
Clay mineralogy and its effect on physical properties in the Gulf of Mexico northwestern continental slope
Berti, Debora
The clay mineral composition of sediments deposited in the last six oxygen isotope stages in the Gulf of Mexico continental slope was characterized. Smectite and illite were found to be the two major clay minerals of the clay fraction while...
,Altitudinal distribution of monthly norms of precipitation on the northern slope of the Kyrgyz range (Kyrgyzstan)
Richner, Heinz
range (Kyrgyzstan) Korobitsina . 1. Introduction Our main task was to identify territorial distribution of precipitation on the northern slope of the Kyrgyz range (NSKR) (within Kyrgyzstan), where over 30 rivers, widely
Automated suppression of errors in LTP-II slope measurements with x-ray optics
Ali, Zulfiqar
slope measurements with x-ray optics Zulfiqar Ali, Curtis L.with state-of-the-art x-ray optics. Significant suppressionscanning, metrology of x-ray optics, deflectometry Abstract
New evidence of slope instability in the Outardes Bay delta area, Quebec, Canada
Long, Bernard
features are in direct relationship with the seismic interpretation of the data collected upslope multibeam sonar (95 kHz) on the slope to provide high-resolution seismic and bathy- metric data. The seismic
Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler
Yashchuk, Valeriy V.
Device for X-ray Optics at BESSY,� Proc. AIP 705, [2] R.D.Elektronenspeicherring BESSY-II, Albert- Einstein-Str. 15,Machine) slope profiler at BESSY (Germany) [1] and the
Engineering properties of Resedimented Ugnu Clay from the Alaskan North Slope
Jones, Cullen A. (Cullen Albert)
This research determined the engineering properties of laboratory Resedimented Ugnu Clay (RUC) specimens created using recovered material from 3800 ft below the surface of the Alaskan Northern Slope to aid with future ...
Spatial distribution of geotechnical properties in surficial marine sediments-Northwestern slope region, Gulf of Mexico
Meyer, Matthew Kael
recent periods of geologic time. The only silty sediments encountered in this study were retrieved from these three general locations. In general, the study illustrated that highly localized sedimentation environments occur along the continental slope...
Interpretation of side-scan sonar images from hydrocarbon seep areas of the Louisiana continental slope
Hou, Rusheng
Side-scan sonar images from the Louisiana continental slope were examined to study hydrocarbon seepage and related surficial geologic seafloor features. Three study areas are located in the Green Canyon area and the Garden Bank area. Hydrocarbon...
Evolution of depositional and slope instability processes on Bryant Canyon area, Northwest Gulf of Mexico
Tripsanas, Efthymios
. At about 11 ky B.P. the melt water discharges of the North America switched from Mississippi River to St Lawrence Seaway, causing the domination of hemipelagic sedimentation on the continental slope of the northwest Gulf of Mexico....
Thornton, Melanie 1989-
fulfillment of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by MELANIE R. THORNTON MONITORING STRATIFICATION AND CURRENTS AT THE CONTINENTAL SLOPE OF THE SCOTIA SEA, ANTARCTICA Approved by... of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by MELANIE R. THORNTON iii ABSTRACT Monitoring Stratification and Currents at the Continental Slope of the Scotia Sea, Antarctica. (April 2011...
Paris-Sud XI, Universit� de
T�h�ran puis sur le terrain, avec un grand merci � Hamid Nazari et Mohammad Foroutan, gr�ce � qui les
Off-road obstacle classification and traversability analysis in the presence of negative obstacles
Larson, Jacoby
those areas that are the most hazardous. Classificationin the area of mobility in the face of hazardous terrain.
11. THIS ITEM APPLIES TO AMENDMENTS OF SOLICITATIONS 0 The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers 0 is extended, 0 is not extended.
the influence of terrain properties on the ecosystem or other variables of interest including the human systems
Digital Object Identifier (DOI) 10.1007/s00138-002-0097-7 Machine Vision and Applications (2003) 14: 514 Machine Vision and
Pollefeys, Marc
of the planetary terrain is computed, and for controlling the motion of the rover, using light emitting diodes
Howat, Ian M.
) and built patented 3D models of terrain which prefigured today's "3D printing." In the concluding part
Larzillire, Pnloe (2007) Islamisme et nationalisme dans les Territoires palestiniens de la premire la seconde Intifada in Khoury, G., Mouchy, N. (dir.), Etats et Socits de l'Orient
factions de gauche, on assiste, sur le terrain de la mobilisation politique, � une quasi-disparition du
Stability of submerged slopes on the flanks of the Hawaiian Islands, a simplified approach
Lee, H.J.; Torresan, M.E.; McArthur, W.
Undersea transmission lines and shoreline AC-DC conversion stations and near-shore transmission lines are being considered as part of a system for transporting energy between the Hawaiian Islands. These facilities will need to be designed so that they will not be damaged or destroyed by coastal or undersea landslides. Advanced site surveys and engineering design of these facilities will require detailed site specific analyses, including sediment sampling and laboratory testing of samples, in situ testing of sediment and rock, detailed charting of bathymetry, and two- or three-dimensional numerical analyses of the factors of safety of the slopes against failure from the various possible loading mechanisms. An intermediate approximate approach can be followed that involves gravity and piston cores, laboratory testing and the application of simplified models to determine a seismic angle of repose for actual sediment in the vicinity of the planned facility. An even simpler and more approximate approach involves predictions of angles of repose using classification of the sediment along a proposed route as either a coarse volcaniclastic sand, a calcareous ooze, or a muddy terrigenous sediment. The steepest slope that such a sediment can maintain is the static angle of repose. Sediment may be found on slopes as steep as these, but it must be considered metastable and liable to fail in the event of any disturbance, storm or earthquake. The seismic angle of repose likely governs most slopes on the Hawaiian Ridge. This declivity corresponds to the response of the slope to a continuing seismic environment. As a long history of earthquakes affects the slopes, they gradually flatten to this level. Slopes that exceed or roughly equal this value can be considered at risk to fail during future earthquakes. Seismic and static angles of repose for three sediment types are tabulated in this report.
Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler
Yashchuk, Valeriy V.; Barber, Samuel; Domning, Edward E.; Kirschman, Jonathan L.; Morrison, Gregory Y.; Smith, Brian V.; Siewert, Frank; Zeschke, Thomas; Geckeler, Ralf; Just, Andreas
Development of X-ray optics for 3rd and 4th generation X-ray light sources with a level of surface slope precision of 0.1-0.2 {micro}rad requires the development of adequate fabrication technologies and dedicated metrology instrumentation and methods. Currently, the best performance of surface slope measurement has been achieved with the NOM (Nanometer Optical Component Measuring Machine) slope profiler at BESSY (Germany) [1] and the ESAD (Extended Shear Angle Difference) profiler at the PTB (Germany) [2]. Both instruments are based on electronic autocollimators (AC) precisely calibrated for the specific application [3] with small apertures of 2.5-5 mm in diameter. In the present work, we describe the design, initial alignment and calibration procedures, the instrumental control and data acquisition system, as well as the measurement performance of the Developmental Long Trace Profiler (DLTP) slope measuring instrument recently brought into operation at the Advanced Light Source (ALS) Optical Metrology Laboratory (OML). Similar to the NOM and ESAD, the DLTP is based on a precisely calibrated autocollimator. However, this is a reasonably low budget instrument used at the ALS OML for the development and testing of new measuring techniques and methods. Some of the developed methods have been implemented into the ALS LTP-II (slope measuring long trace profiler [4]) which was recently upgraded and has demonstrated a capability for 0.25 {micro}rad surface metrology [5]. Performance of the DLTP was verified via a number of measurements with high quality reference mirrors. A comparison with the corresponding results obtained with the world's best slope measuring instrument, the BESSY NOM, proves the accuracy of the DLTP measurements on the level of 0.1-0.2 {micro}rad depending on the curvature of a surface under test. The directions of future work to develop a surface slope measuring profiler with nano-radian performance are also discussed.
Bringing Alaska North Slope Natural Gas to Market (released in AEO2009)
Reports and Publications (EIA)
At least three alternatives have been proposed over the years for bringing sizable volumes of natural gas from Alaska's remote North Slope to market in the lower 48 states: a pipeline interconnecting with the existing pipeline system in central Alberta, Canada; a gas-to-liquids (GTL) plant on the North Slope; and a large liquefied natural gas (LNG) export facility at Valdez, Alaska. The National Energy Modeling System (NEMS) explicitly models the pipeline and GTL options. The what if LNG option is not modeled in NEMS.
Slope design and implementation in open pit mines; geological and geomechanical Jean-Alain FLEURISSON
Boyer, Edmond
1 GHGT-9 Slope design and implementation in open pit mines; geological and geomechanical approach all natural geological and geomechanical features and the geological structures as well and geomechanical data; 2) determination of the potential mechanisms of deformation and failure, and their numerical
A chronostratigraphic framework for the northwestern slope of the gulf of mexico
Elston, Kristen Eileen
Sediments from two cores, JPC31 and JPC46, were analyzed to better understand the relationship between climate and sediment deposition on the continental slope of the northwestern Gulf of Mexico. These two cores were selected from a suite of cores...
Density slope of the nuclear symmetry energy from the neutron skin thickness of heavy nuclei
Chen, Lie-Wen; Ko, Che Ming; Li, Bao-An; Xu, Jun.
of finite nuclei and nuclear matter properties. We find that existing data on neutron skin thickness Delta r(np) of Sn isotopes give an important constraint on the symmetry energy E(sym)(rho(0)) and its density slope L at saturation density rho(0). Combining...
McKendry, Ian
EVIDENCE OF ELEVATED OZONE CONCENTRATIONS ON FORESTED SLOPES OF THE LOWER FRASER VALLEY, BRITISH, hourly average ozone concentrations were mea- sured at three sites of differing elevation (188, 588. Sites experienced ozone concentrations ranging from 0 to 88 ppb in 2001, and 0 to 96 ppb in 2002. Daily
The epibenthic megafauna of the northern Gulf of Mexico continental slope
Ziegler, Matthew Peek
The epibenthic megafauna of the continental slope and abyssal plain of the northern Gulf of Mexico have been investigated using multi-shot bottom photography. A total of 10,388 photographs were analyzed from 100 sites encompassing a total area...
DRAFT TECHNICAL GUIDANCE DOCUMENT ON STATIC AND SEISMIC SLOPE STABILITY FOR SOLID WASTE CONTAINMENT FACILITIES PRODUCED BY THE SOLID WASTE MANAGEMENT PROGRAM DIVISION OF ENVIRONMENTAL QUALITY MISSOURI IN GEOSYNTHETIC MATERIALS Page 33 5.0 ENGINEERING PROPERTIES OF MUNICIPAL SOLID WASTE Page 36 I. STATIC PROPERTIES
Recent glacially influenced sedimentary processes on the East Greenland continental slope and deep Greenland Basin
Jakobsson, Martin
Recent glacially influenced sedimentary processes on the East Greenland continental slope and deep Greenland Basin Marga Garc�a a,*, Julian A. Dowdeswell a , Gemma Ercilla b , Martin Jakobsson c a Scott June 2012 Available online xxx Keywords: Greenland Basin Glacially influenced sedimentary processes
Probabilistic slope stability analysis by finite elements D.V. Griffiths*
Probabilistic slope stability analysis by finite elements D.V. Griffiths* and Gordon A. Fenton. The advanced method, called the random finite element method (RFEM), uses elasto- plasticity combined nonlinear finite element methods are combined with ran- dom field generation techniques. This method, called
Microbial carbon sources on the shelf and slope of the northwestern Gulf of Mexico
Rauschenberg, Carlton David
, hypoxic regions that occur seasonally and deep slope and abyssal plain sediments of the Gulf of Mexico (GOM). Previous reports using the Laguna Madre data as examples, have been used to make comparisons of PLFA 16:0 and PLFA 15:0 isotope ratios and PLFA 16...
1 INTRODUCTION Geosynthetic clay liners (GCLs) with geomembranes (GMs) placed on slopes as part of composite
Zornberg, Jorge G.
143 1 INTRODUCTION Geosynthetic clay liners (GCLs) with geomembranes (GMs) placed on slopes as part and interface shear strength of geosynthetic clay liners J.G. ZORNBERG The University of Texas at Austin, Austin of composite liner systems may be subject to a complex, time-dependent state of stresses. Stability is a major
Hansen, James E.
A SLIPPERY SLOPE: HOW MUCH GLOBAL WARMING CONSTITUTES "DANGEROUS ANTHROPOGENIC INTERFERENCE on the global warming that can be tolerated without risking dangerous anthropogenic interference with climate. I" mainly as a metaphor for the danger posed by global warming. So I changed "Hell" to "disaster." What
A guidebook for insulated low-slope roof systems. IEA Annex 19, Low-slope roof systems: International Energy Agency Energy Conservation in Buildings and Community Systems Programme
Not Available
Low-slope roof systems are common on commercial and industrial buildings and, to a lesser extent, on residential buildings. Although insulating materials have nearly always been a component of low-slope roofs, the amount of insulation used has increased in the past two decades because of escalation of heating and cooling costs and increased awareness of the need for energy conservation. As the amount of insulation has increased, the demand has intensified for design, installation, and maintenance information specifically for well-insulated roofs. Existing practices for design, installation, and maintenance of insulated roofs have evolved from experience. Typically, these practices feature compromises due to the different properties of materials making up a given roof system. Therefore, they should be examined from time to time to ensure that they are appropriate as new materials continue to enter the market and as the data base on existing systems expands. A primary purpose of this International Energy Agency (IEA) study is to assess current roofing insulation practices in the context of an accumulating data base on performance.
Phreatic flow on sloping soil layers from a finite source: An analytical solution
Filley, T.H.
Sloping clay layers beneath percolation ponds can cause infiltrating wastewater to pond and move in directions not predicted by vertical infiltration equations. This report presents a method for estimating the potential of wastewater from percolation sumps located over sloping clay layers to interact with nearby groundwater resources. The analytical solution developed is for steady-state conditions and includes a procedure to estimate the time needed to reach steady state. The fundamental assumption used in the mathematical development requires that elevation-head gradients be much larger than pressure-head gradients. A method for testing the validity of this assumption is also included. An example calculation was performed for percolation sumps on the Naval Petroleum Reserve No. 1 in Elk Hills, California. That analysis showed that, under the assumptions used, the sumps may have enabled oil field wastewater to reach groundwater resources within the adjacent San Joaquin Valley. 9 refs., 10 figs.
Is the friction angle the maximum slope of a free surface of a non cohesive material?
A. Modaressi; P. Evesque
Starting from a symmetric triangular pile with a horizontal basis and rotating the basis in the vertical plane, we have determined the evolution of the stress distribution as a function of the basis inclination using Finite Elements method with an elastic-perfectly plastic constitutive model, defined by its friction angle, without cohesion. It is found that when the yield function is the Drucker-Prager one, stress distribution satisfying equilibrium can be found even when one of the free-surface slopes is larger than the friction angle. This means that piles with a slope larger than the friction angle can be (at least) marginally stable and that slope rotation is not always a destabilising perturbation direction. On the contrary, it is found that the slope cannot overpass the friction angle when a Mohr-Coulomb yield function is used. Theoretical explanation of these facts is given which enlightens the role plaid by the intermediate principal stress in both cases of the Mohr-Coulomb criterion and of the Drucker-Prager one. It is then argued that the Mohr-Coulomb criterion assumes a spontaneous symmetry breaking, as soon as the two smallest principal stresses are different ; this is not physical most likely; so this criterion shall be replaced by a Drucker-Prager criterion in the vicinity of the equality, which leads to the previous anomalous behaviour ; so these numerical computations enlighten the avalanche process: they show that no dynamical angle larger than the static one is needed to understand avalanching. It is in agreement with previous experimental results. Furthermore, these results show that the maximum angle of repose can be modified using cyclic rotations; we propose a procedure that allows to achieve a maximum angle of repose to be equal to the friction angle .
A probabilistic investigation of slope stability in the Wasatch Range, Davis County, Utah
Eblen, James Storey
. LISA (Level I Stability Analysis), a U. S. Forest Service probabilistic, slope stability model, and a deterministic model, dLISA, will be used in this study. The applicability of the two models will be established as follows: 1) Establish parametric... processes. Keaton (1988) developed a probabilistic model to evaluate hazards that are associated with alluvial fan sedimentation in Davis County, Utah. Keaton concluded that most of the canyons which yielded large volumes of sediment in 1983 and 1984 had...
Distribution of high molecular weight hydrocarbons in northern Gulf of Mexico continental slope sediments
Sericano, Jose Luis
. Department of Energy's Strategic Petroleum Reserve Program (SPR). This program plans to store one billion barrels of oil in solution-mined salt cavities near existing petroleum distribution facilities along the Gulf of Mexico coast. This study, conducted... of petroleum on the deep ocean benthos. The outer continental shelf and slope in many areas of the world include sites of potential oil and gas reserves which have not been previously developed due to technological constraints. However, new technology...
Microstructure and conductance-slope of InAs/GaSb tunnel diodes
Iutzi, Ryan M., E-mail: email@example.com; Fitzgerald, Eugene A. [Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
InAs/GaSb and similar materials systems have generated great interest as a heterojunction for tunnel field effect transistors (TFETs) due to favorable band alignment. However, little is currently understood about how such TFETs are affected by materials defects and nonidealities. We present measurements of the conductance slope for various InAs/GaSb heterojunctions via two-terminal electrical measurements, which removes three-terminal parasitics and enables direct study on the effect of microstructure on tunnelling. Using this, we can predict how subthreshold swings in TFETs can depend on microstructure. We also demonstrate growth and electrical characterization for structures grown by metalorganic chemical vapor deposition (MOCVD)�a generally more scalable process compared with molecular beam epitaxy (MBE). We determine that misfit dislocations and point defects near the interface can lead to energy states in the band-gap and local band bending that result in trap-assisted leakage routes and nonuniform band alignment across the junction area that lower the steepness of the conductance slope. Despite the small lattice mismatch, misfit dislocations still form in InAs on GaSb due to relaxation as a result of large strain from intermixed compositions. This can be circumvented by growing GaSb on InAs, straining the GaSb underlayer, or lowering the InAs growth temperature in the region of the interface. The conductance slope can also be improved by annealing the samples at higher temperatures, which we believe acts to annihilate point defects and average out major fluctuations in band alignment across the interface. Using a combination of these techniques, we can greatly improve the steepness of the conductance slope which could result in steeper subthreshold swings in TFETs in the future.
VEHICLE 1vlOBILITY TES'J'S SOFT SOIL SLOPES
Rathbun, Julie A.
VEHICLE 1vlOBILITY TES'J'S SOFT SOIL SLOPES June 2 5 , 1970 J E T P R O P U L S I O N L A B C A L f;760-51 FOREWORD The investigation documented in this report constitutes part of the Lunar Roving Vehicle (LRV. :;: These vehicle mobility tests have been performed to develop :: National Aeronautics and Space Administration
Optimal tuning and calibration of bendable mirrors with slope measuring profilers
McKinney, Wayne; Kirschman, Jonathan; MacDowell, Alastair; Warwick, Tony; Yashchuk, Valeriy
We describe a technique to optimally tune and calibrate bendable x-ray optics for sub-micron focusing. The focusing is divided between two elliptically cylindrical reflecting elements, a Kirkpatrick-Baez (KB) pair. Each optic is shaped by applying unequal bending couples to each end of a flat mirror. The developed technique allowsoptimal tuning of these systems using surface slope data obtained with a slope measuring instrument, the long trace profiler (LTP). Due to the near linearity of the problem, the minimal set of data necessary for the tuning of each bender, consists of only three slope traces measured before and after a single adjustment of each bending couple. The data are analyzed with software realizing a method of regression analysis with experimentally found characteristic functions of the benders. The resulting approximation to the functional dependence of the desired shape provides nearly final settings. Moreover, the characteristic functions of the benders found in the course of tuning, can be used for retuning to a new desired shape without removal from the beamline and re-measuring. We perform a ray trace, using profiler data for the finally tuned optics, predicting the performance to be expected during use of the optics on the beamline.
The bends in the slopes of radial abundance gradients in the disks of spiral galaxies -- do they exist?
L. S. Pilyugin
Spiral galaxies with a reported bend in the slope of gradient in the oxygen abundances (O/H)_R23, derived with traditionally used R23 - method, were examined. It is shown that the artificial origin of the reported bends can be naturally explained. Two reasons that result in a false bend in the slope of (O/H)_R23 gradient are indicated. It is concluded that at the present time there is no example of a galaxy with an undisputable established bend in the slope of the oxygen abundance gradient.
Surface circulation in the Gulf of Cadiz: 2. Inflow-outflow coupling and the Gulf of Cadiz slope
Brest, Universit� de
that of the atmospheric forcing in driving the upper slope currents. The Mediteranean outflow forces a surface open ocean filaments con- touring Cape St. Vincent and penetrating eastward into the warmer GoC waters that suggest
Vegetation patterns of Pine Canyon, Big Bend National Park, Texas, in relation to elevation and slope aspect�
Harris, Bryan Joseph
and richness, and stem density are also analyzed. Communities encountered on the south-facing slope, from low to high elevation, are: Chihuahuan Desert shrubland, sotol grassland, open oak shrubland, mixed shrubland, and oak-pinyon-juniper woodland. Communities...
The Component Slope Linear Model for Calculating Intensive Partial Molar Properties: Application to Waste Glasses
Reynolds, Jacob G. [Washington River Protection Solutions, Richland, WA (United States)
Partial molar properties are the changes occurring when the fraction of one component is varied while the fractions of all other component mole fractions change proportionally. They have many practical and theoretical applications in chemical thermodynamics. Partial molar properties of chemical mixtures are difficult to measure because the component mole fractions must sum to one, so a change in fraction of one component must be offset with a change in one or more other components. Given that more than one component fraction is changing at a time, it is difficult to assign a change in measured response to a change in a single component. In this study, the Component Slope Linear Model (CSLM), a model previously published in the statistics literature, is shown to have coefficients that correspond to the intensive partial molar properties. If a measured property is plotted against the mole fraction of a component while keeping the proportions of all other components constant, the slope at any given point on a graph of this curve is the partial molar property for that constituent. Actually plotting this graph has been used to determine partial molar properties for many years. The CSLM directly includes this slope in a model that predicts properties as a function of the component mole fractions. This model is demonstrated by applying it to the constant pressure heat capacity data from the NaOH-NaAl(OH{sub 4}H{sub 2}O system, a system that simplifies Hanford nuclear waste. The partial molar properties of H{sub 2}O, NaOH, and NaAl(OH){sub 4} are determined. The equivalence of the CSLM and the graphical method is verified by comparing results detennined by the two methods. The CSLM model has been previously used to predict the liquidus temperature of spinel crystals precipitated from Hanford waste glass. Those model coefficients are re-interpreted here as the partial molar spinel liquidus temperature of the glass components.
Slump dominated upper slope reservoir facies, Intra Qua Iboe (Pliocene), Edop Field, offshore Nigeria
Shanmugam, G. [Mobil Research and Development Corp., Dallas, TX (United States); Hermance, W.E.; Olaifa, J.O. [Mobil Producing Nigeria, Lagos (Nigeria)
An integration of sedimentologic and 3D seismic data provides a basis for unraveling complex depositional processes and sand distribution of the Intra Qua Iboe (IQI) reservoir (Pliocene), Edop Field, offshore Nigeria. Nearly 3,000 feet of conventional core was examined in interpreting slump/slide/debris flow, bottom current, turbidity current, pelagic/hemipelagic, wave and tide dominated facies. The IQI was deposited on an upper slope in close proximity to the shelf edge. Through time, as the shelf edge migrated seaward, deposition began with a turbidite channel dominated slope system (IQI 1 and 2) and progressed through a slump/debris flow dominated slope system (IQI 3, the principal reservoir) to a tide and wave dominated, collapsed shelf-edge deltaic system (IQI 4). Using seismic time slices and corresponding depositional facies in the core, a sandy {open_quotes}fairway{open_quotes} has been delineated in the IQI 3. Because of differences in stacking patterns of sandy and muddy slump intervals, seismic facies show: (1) both sheet-like and mounded external forms (geometries), and (2) parallel/continuous as well as chaotic/hummocky internal reflections. In wireline logs, slump facies exhibits blocky, coarsening-up, fining-up, and serrated motifs. In the absence of conventional core, slump facies may be misinterpreted and even miscorrelated because seismic facies and log motifs of slumps and debris flows tend to mimic properties of turbidite fan deposits. The slump dominated reservoir facies is composed of unconsolidated fine-grained sand. Thickness of individual units varies from 1 to 34 feet, but amalgamated intervals reach a thickness of up to 70 feet and apparently form connected sand bodies. Porosity commonly ranges from 20 to 35%. Horizontal permeability commonly ranges from 1,000 to 3,000 md.
The shallow geologic features of the upper continental slope, northern Gulf of Mexico�
Buck, Arvo Viktor
region of the upper continental slope in the Gulf of Mexico lying immediately west of the Mississippi Trough (Fig. 1). water depths range from 150 m (500 ft) to a maximum of 1200 m (4000 ft). The area is centered on 28 00'N, 90'30'W, with the eastern... extremity being the western margin of the Mississippi Trough. The area is approximately 155 km by 55 km (96 mi by 33 mi) in size. The seismic data within the region were collected along lines of a 6. 4 km by 6. 4 km grid. +30~ 88' 0/I, ' oo goo ooo...
The shallow geologic features of the upper continental slope, northern Gulf of Mexico
Buck, Arvo Viktor
region of the upper continental slope in the Gulf of Mexico lying immediately west of the Mississippi Trough (Fig. 1). water depths range from 150 m (500 ft) to a maximum of 1200 m (4000 ft). The area is centered on 28 00'N, 90'30'W, with the eastern... extremity being the western margin of the Mississippi Trough. The area is approximately 155 km by 55 km (96 mi by 33 mi) in size. The seismic data within the region were collected along lines of a 6. 4 km by 6. 4 km grid. +30~ 88' 0/I, ' oo goo ooo...
Godwin A. Chukwu, Ph.D., P.E.
The Alaskan North Slope is one of the largest hydrocarbon reserves in the US where Gas-to-Liquids (GTL) technology can be successfully implemented. The proven and recoverable reserves of conventional natural gas in the developed and undeveloped fields in the Alaskan North Slope (ANS) are estimated to be 38 trillion standard cubic feet (TCF) and estimates of additional undiscovered gas reserves in the Arctic field range from 64 TCF to 142 TCF. Transportation of the natural gas from the remote ANS is the key issue in effective utilization of this valuable and abundance resource. The throughput of oil through the Trans Alaska Pipeline System (TAPS) has been on decline and is expected to continue to decline in future. It is projected that by the year 2015, ANS crude oil production will decline to such a level that there will be a critical need for pumping additional liquid from GTL process to provide an adequate volume for economic operation of TAPS. The pumping of GTL products through TAPS will significantly increase its economic life. Transporting GTL products from the North Slope of Alaska down to the Marine terminal at Valdez is no doubt the great challenge facing the Gas to Liquids options of utilizing the abundant natural gas resource of the North Slope. The primary purpose of this study was to evaluate and assess the economic feasibility of transporting GTL products through the TAPS. Material testing program for GTL and GTL/Crude oil blends was designed and implemented for measurement of physical properties of GTL products. The measurement and evaluation of the properties of these materials were necessary so as to access the feasibility of transporting such materials through TAPS under cold arctic conditions. Results of the tests indicated a trend of increasing yield strength with increasing wax content. GTL samples exhibited high gel strengths at temperatures as high as 20 F, which makes it difficult for cold restart following winter shutdowns. Simplified analytical models were developed to study the flow of GTL and GTL/crude oil blends through TAPS in both commingled and batch flow models. The economics of GTL transportations by either commingled or batching mode were evaluated. The choice of mode of transportation of GTL products through TAPS would depend on the expected purity of the product and a trade-off between loss in product value due to contamination and cost of keeping the product pure at the discharge terminal.
Sandia Energy - Alaskan North Slope Climate: Hard Data from a Hard Place
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection245C Unlimited ReleaseWelcome ton6 thCONTRACTORSAlaskan North Slope
Construction of an innovative retaining wall and slope protection for controlling erosion of asbestos in soil
Lynn, C.G.
Environmental Resources Management (ERM) is constructing an innovative H-Pile retaining wall and slope protection to control erosion of soil mixed with asbestos-containing material (ACM) along a half-mile long section of a flowing creek in a metropolitan area. Former manufacturing plants adjacent to the creek historically produced ACM-reinforced construction materials. ACM was apparently used as subgrade fill consistent with industry practices at the time, and when manufacturing ceased, the site was closed with approval by the state and the U.S. EPA. Erosion along the creek has resulted in exposure of the ACM and the need to stabilize the bank due to backwater flooding and storm water discharge from a large urban area. Through a cooperative effort among the state regulatory agency, the municipal sewer district, the U.S. Army Corps. of Engineers (USACOE), and the local community, construction is in progress for an H-Pile beam and concrete lagging wall that extends the length of the project reach. Behind the wall, cabled concrete mats are placed over the graded slope to stabilize ACM-bearing soil. Premier to the success of the project is protecting the environment from release of ACM during construction, and minimizing the disturbance of ACM-bearing soil. Unique soil sampling, testing, and handling procedures were negotiated through the state's voluntary cleanup program, with the intent of receiving a No Further Action letter for the completed project.
Godwin Chukwu
The Alaskan North Slope (ANS) is one of the largest hydrocarbon reserves in the United States where Gas-to-Liquids (GTL) technology can be successfully implemented. The proven and recoverable reserves of conventional natural gas in the developed and undeveloped fields in the Alaskan North Slope (ANS) are estimated to be 38 trillion standard cubic feet (TCF) and estimates of additional undiscovered gas reserves in the Arctic field range from 64 TCF to 142 TCF. Because the domestic gas market in the continental United States is located thousands of miles from the ANS, transportation of the natural gas from the remote ANS to the market is the key issue in effective utilization of this valuable and abundant resource. The focus of this project is to study the operational challenges involved in transporting the gas in converted liquid (GTL) form through the existing Trans Alaska Pipeline System (TAPS). A three-year, comprehensive research program was undertaken by the Petroleum Development Laboratory, University of Alaska Fairbanks, under cooperative agreement No. DE-FC26-98FT40016 to study the feasibility of transporting GTL products through TAPS. Cold restart of TAPS following an extended winter shutdown and solids deposition in the pipeline were identified as the main transportation issues in moving GTL products through the pipeline. The scope of work in the current project (Cooperative Agreement No. DE-FC26-01NT41248) included preparation of fluid samples for the experiments to be conducted to augment the comprehensive research program.
The Effects of Roof Membrane Color on Moisture Accumulation in Low-slope Commercial Roof Systems
Kehrer, Manfred [ORNL
The use of highly reflective roof membrane systems is being promoted and in some cases required in energy codes and green building codes and standards. Highly reflective membranes, which typically are light in color, have demonstrated reduced overall energy consumption in cooling dominated climate. These membranes also are theorized to reduce the heat island effect. Concern has been expressed about using highly reflective roof membrane systems in cool to cold climate zones because they potentially increase moisture accumulation in roof systems. Roof membranes are vapor retarders. The theory is that highly reflective membranes reflect the heat that could enter the roof assembly, potentially providing a condensing surface on the cold side of the roof assembly during winter months. The other concern is that roof systems using highly reflective membranes will not get hot enough during the summer months to dry out moisture that may have condensed or otherwise entered the roof assembly. This study focuses on mechanically attached, highly reflective, single-ply roof systems installed on low-slope (less than 2:12) structures in cool to cold climate zones. Three sources of data are considered when determining the moisture accumulation potential of these systems. 1.Test roof cuts taken during the winter months 2.Modeling data from a building envelope model specifically designed to evaluate moisture accumulation 3.Data from previous studies to determine the effects of roof membrane color on the drying rate of low-slope roof assemblies
Atmospheric Radiation Measurement (ARM) Data from the North Slope Alaska (NSA) Site
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy. The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. To achieve this goal, ARM scientists and researchers around the world use continuous data obtained through the ARM Climate Research Facility. ARM maintains four major, permanent sites for data collection and deploys the ARM Mobile Facility to other sites as determined. The North Slope of Alaska (NSA) site is a permanent site providing data about cloud and radiative processes at high latitudes. These data are being used to refine models and parameterizations as they relate to the Arctic. Centered at Barrow and extending to the south (to the vicinity of Atqasuk), west (to the vicinity of Wainwright), and east (towards Oliktok), the NSA site has become a focal point for atmospheric and ecological research activity on the North Slope. Approximately 300,000 NSA data sets from 1993 to the present reside in the ARM Archive at http://www.archive.arm.gov/. Users will need to register for a password, but all files are then free for viewing or downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.
Photoisomerization for a model protonated Schiff base in solution: Sloped/peaked conical intersection perspective
Malhado, Joao Pedro [Instituto de Fisica, Universidade de Sao Paulo, CP 66318, 05314-970 Sao Paulo, SP (Brazil); Hynes, James T. [Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215 (United States); Chemistry Department, Ecole Normale Superieure, UMR ENS-CNRS-UPMC 8640, 24 rue Lhomond, 75005 Paris (France)
The topographical character of conical intersections (CIs)-either sloped or peaked-has played a fundamental and important role in the discussion of the efficiency of CIs as photochemical 'funnels.' Here this perspective is employed in connection with a recent study of a model protonated Schiff base (PSB) cis to trans photoisomerization in solution [Malhado et al., J. Phys. Chem. A 115, 3720 (2011)]. In that study, the calculated reduced photochemical quantum yield for the successful production of trans product versus cis reactant in acetonitrile solvent compared to water was interpreted in terms of a dynamical solvent effect related to the dominance, for the acetonitrile case, of S{sub 1} to S{sub 0} nonadiabatic transitions prior to the reaching the seam of CIs. The solvent influence on the quantum yield is here re-examined in the sloped/peaked CI topographical perspective via conversion of the model's two PSB internal coordinates and a nonequilibrium solvent coordinate into an effective branching space description, which is then used to re-analyze the generalized Langevin equation/surface hopping results. The present study supports the original interpretation and enriches it in terms of topographical detail.
Determination of Limit Cycles Using Both the Slope of Correlation Integral and Dominant Lyapunov Methods
Castillo, Rogelio; Alonso, Gustavo; Palacios, Javier C. [Instituto Nacional de Investigaciones Nucleares (Mexico)
A method for nonlinear analysis of instabilities in boiling water reactors (BWRs) is presented. Both the Dominant Lyapunov Exponent method and the Slope of the Correlation Integral (SOCI) method are used to analyze the average power reactor monitor (APRM) signals from a BWR. The main advantage of using the two methods in a complementary manner is that doing so results in an enhancement of the capability to analyze noisy systems, such as the APRM signals in a BWR. Previously, such nonlinear analysis had been performed using independently either the Dominant Lyapunov Exponent Method or the SOCI method. These two methods are sensitive to noise in a signal and normally require large amounts of data for a reliable analysis.This proposed system for nonlinear analysis is composed first of a home-developed computer program called 'SLOPE', which is based on the SOCI method. Then, the signal analysis is also performed by the 'LENNS' code, which is used to obtain the dominant Lyapunov exponent. Since only the dominant Lyapunov exponent is computed, there is no need to acquire large amounts of data; thus, computational processing time is greatly reduced, even in the case of noisy data.The system was used to analyze BWR signals containing stationary and nonstationary limit cycles. It was found that this method satisfactorily calculates the limit cycles, extracting useful information from noisy signals.
Physical and Chemical Implications of Mid-Winter Pumping of Trunda Lakes - North Slope, Alaska
Hinzman, Larry D. (University of Alaska Fairbanks, Water and Environmental Research Center); Lilly, Michael R. (Geo-Watersheds Scientific); Kane, Douglas L. (University of Alaska Fairbanks, Water and Environmental Research Center); Miller, D. Dan (University of Alaska Fairbanks, Water and Environmental Research Center); Galloway, Braden K. (University of Alaska Fairbanks, Water and Environmental Research Center); Hilton, Kristie M. (Geo-Watersheds Scientific); White, Daniel M. (University of Alaska Fairbanks, Water and Environmental Research Center)
Tundra lakes on the North Slope, Alaska, are an important resource for energy development and petroleum field operations. A majority of exploration activities, pipeline maintenance, and restoration activities take place on winter ice roads that depend on water availability at key times of the winter operating season. These same lakes provide important fisheries and ecosystem functions. In particular, overwintering habitat for fish is one important management concern. This study focused on the evaluation of winter water use in the current field operating areas to provide a better understanding of the current water use practices. It found that under the current water use practices, there were no measurable negative effects of winter pumping on the lakes studied and current water use management practices were appropriately conservative. The study did find many areas where improvements in the understanding of tundra lake hydrology and water usage would benefit industry, management agencies, and the protection of fisheries and ecosystems.
Laboratory measurements of the drying rates of low-slope roofing systems
Desjarlais, A.O.; Kyle, D.M.; Childs, P.W.; Christian, J.E.
The service life of a roofing system typically ends when excessive amounts of water have entered the system. Roofing professionals determine whether the existing failed roofing system can be repaired or salvaged by recovering. A key element in this decision is whether the accumulated water will be able to leave the roofing system in a time frame that will prevent irreparable structural damage. There are several combined heat and mass transfer models that can be used to predict drying times for low-slope roofing systems. Very little experimental data exists that can be used to validate the performance of these models. To satisfy these needs, a series of laboratory experiments has been performed. Five test panels, comprised of a plywood deck, four types of roofing insulation, and a single ply membrane were installed in a climate simulator. The test panels were outfitted with temperature sensors and heat flux transducers, and were mounted on load cells. Water was added to the test panels and they were subjected to external diurnal cycles representative of summer and winter conditions for a southern US continental climate. The load cells supplied continuous records of the weights of the test panels; these data were used to compute the drying rates of the test panels. When these experiments were completed, the test panels were ``recovered`` with different thicknesses of insulation and the environmental conditions were reapplied to the test panels. This paper reports on the design and performance of these experiments. The data compiled during these tests supply insight into the effects of meteorological conditions, insulation R-value, insulation water vapor permeance, and roof recover on the rate that water will be removed from low-slope roofing systems.
Alaska North Slope National Energy Strategy initiative: Analysis of five undeveloped fields
Thomas, C.P.; Allaire, R.B.; Doughty, T.C.; Faulder, D.D.; Irving, J.S.; Jamison, H.C.; White, G.J.
The US Department of Energy was directed in the National Energy Strategy to establish a federal interagency task force to identify specific technical and regulatory barriers to the development of five undeveloped North Slope Alaska fields and make recommendations for their resolution. The five fields are West Sak, Point Thomson, Gwydyr Bay, Seal Island/Northstar, and Sandpiper Island. Analysis of environmental, regulatory, technical, and economic information, and data relating to the development potential of the five fields leads to the following conclusions: Development of the five fields would result in an estimated total of 1,055 million barrels of oil and 4.4 trillion cubic feet of natural gas and total investment of $9.4 billion in 1992 dollars. It appears that all five of the fields will remain economically marginal developments unless there is significant improvement in world oil prices. Costs of regulatory compliance and mitigation, and costs to reduce or maintain environmental impacts at acceptable levels influence project investments and operating costs and must be considered in the development decision making process. The development of three of the fields (West Sak, Point Thomson, and Gwydyr Bay) that are marginally feasible would have an impact on North Slope production over the period from about 2000 to 2014 but cannot replace the decline in Prudhoe Bay Unit production or maintain the operation of the Trans-Alaska Pipeline System (TAPS) beyond about 2014 with the assumption that the TAPS will shut down when production declines to the range of 400 to 200 thousand barrels of oil/day. Recoverable reserves left in the ground in the currently producing fields and soon to be developed fields, Niakuk and Point McIntyre, would range from 1 billion to 500 million barrels of oil corresponding to the time period of 2008 to 2014 based on the TAPS shutdown assumption.
Erosion control on a steeply sloped pipeline right-of-way in southwestern Pennsylvania
Zellmer, S.D.; Edgar, D.E. (Argonne National Lab., IL (USA)); Isaacson, H.R. (Gas Research Inst., Chicago, IL (USA))
The results of precipitation on steeply sloped pipeline rights-of-way (ROWs) during the time between ROW rehabilitation and the establishment of a dense, self-sustaining vegetative ground cover can cause locally severe soil erosion. This erosion results in elevated sediment loads in receiving streams and increases the difficulty and costs of ROW maintenance. A field study was completed that compared the environmental effectiveness of nine treatments on a 28% ROW slope in southwestern Pennsylvania. The six erosion-control methods investigated in the study, selected to represent a wide range in material type and installation cost, were (1) heavy application of straw mulch, (2) light application of straw mulch, (3) processed wood fiber, (4) chemical soil binder, (5) paper strips in netting, and (6) light straw mulch with a tacking agent. Each of the test plots also received the basic treatment of limestone, fertilizer, and a seed mixture commonly used to rehabilitate ROWs in the region. Precipitation, runoff volumes, and sediment yields were measured on each of 51 plots for 45 precipitation events during the 18-month study. Vegetation data were collected by the point-intercept method four times during the study to determine the amount of plant cover and species composition. Differences in sediment yield were observed among methods and between ROW location, but plant cover development was not influenced by erosion-control method or location. The relationship between environmental and cost data indicated that, of the six erosion-control methods tested, a light application of straw mulch was the most effective erosion-control treatment. 19 refs., 2 figs., 6 tabs.
Assessment of technologies for constructing self-drying low-slope roofs
Kyle, D.M.; Desjarlais, A.O.
Issues associated with removing excessive moisture from low-slope roofs have been assessed. The economic costs associated with moisture trapped in existing roofs have been estimated. The evidence suggests that existing moisture levels cause approximately a 40% overall reduction in the R-value of installed roofing insulation in the United States. Excess operating costs are further increased by a summertime heat transfer mode unique to wet insulation, caused by the daily migration of water within the roof. By itself, this effect can increase peak electrical demand for air conditioning by roughly 15 W/m{sup 2} of roofing, depending on the type of insulation. This effect will increase peak demand capacity required of utilities in any geographic region (e.g., 900 MW in the South). A simple formula has been derived for predicting the effect that self-drying roofs can have upon time-averaged construction costs. It is presumed that time-averaged costs depend predominantly upon (1) actual service life and (2) the likelihood that the less expensive recover membranes can be installed safely over old roofs. For example, an increase in service life from 15 to 20 years should reduce the current cost of roofing ($12 billion/year) by 21%. Another simple formula for predicting the reroofing waste volume indicates that an increase in service life from 15 to 20 years might reduce the current estimated 0.4 billion ft{sup 3}/year of waste by 25%. A finite-difference computer program has been used to study the flow of heat and moisture within typical existing roofs for a variety of US climates. Nearly all publicly available experimental drying data have been consulted. The drying times for most existing low-slope roofs in the United States are controlled largely climate and the permeability of the structural deck to water vapor.
Theoretical analysis of reflected ray error from surface slope error and their application to the solar concentrated collector
Huang, Weidong
Surface slope error of concentrator is one of the main factors to influence the performance of the solar concentrated collectors which cause deviation of reflected ray and reduce the intercepted radiation. This paper presents the general equation to calculate the standard deviation of reflected ray error from slope error through geometry optics, applying the equation to calculate the standard deviation of reflected ray error for 5 kinds of solar concentrated reflector, provide typical results. The results indicate that the slope error is transferred to the reflected ray in more than 2 folds when the incidence angle is more than 0. The equation for reflected ray error is generally fit for all reflection surfaces, and can also be applied to control the error in designing an abaxial optical system.
A comparison of cloud properties at a coastal and inland site at the North Slope of Alaska
Jakob, Christian
(Barrow) and an inland (Atqasuk) location on the North Slope of Alaska using microwave radiometer (MWR) data collected by the U.S. Department of Energy's Atmospheric Radiation Measurement Program contaminated by wet windows on the MWRs were employed to extract high-quality data suitable for this study
Radiation dose reduction in medical CT through equally sloped tomography Benjamin P. Fahimian1,2,6
Soatto, Stefano
Council on Radiation Protection & Measurements10 , CT accounts for about 15% of the total radiological50Radiation dose reduction in medical CT through equally sloped tomography Benjamin P. Fahimian1 Department of Radiation Oncology, Stanford University, Stanford, CA 94305 3 Biomedical Physics
Quadratic Program based Control of Fully-Actuated Transfemoral Prosthesis for Flat-Ground and Up-Slope Locomotion
Ames, Aaron
Quadratic Program based Control of Fully-Actuated Transfemoral Prosthesis for Flat-Ground and Up to achieve flat-ground and up-slope walking on a fully-actuated above-knee prosthesis. CLF based quadratic--implemented as a feed-forward term--the end result is a prosthesis controller that utilizes only local information while
DESIGN OF A FAILED LANDFILL SLOPE By: Timothy D. Stark, W. Douglas Evans-, and Paul E. Sherry'
DESIGN OF A FAILED LANDFILL SLOPE 1 ~) ~ ~ By: Timothy D. Stark, W. Douglas Evans-, and Paul E solid waste landfill in which lateral displacements of up to 900 ft (275 m) and vertical settlements municipal solid waste landfill occupies 135 acres (546 km 2 ) approximately 9 miles (15.3 km) n
An analysis of cattle-farming in the coffee producing area of the Pacific Slope in Guatemala
Cordon, Oscar Humberto
new native species which can be es- tablished and to maintain grass-legume mixtures for the production of herbage with higher protein and mineral con- tent. Thus far, the most promising legume in the Pacific slope is Tropical Kudzu (Pueraria...
Resonant Generation of Internal Waves on a Model Continental Slope H. P. Zhang, B. King, and Harry L. Swinney
Texas at Austin. University of
within a thin boundary layer above the bottom surface. The resonant wave is unstable because of strong for the intense boundary flows on continental slopes. DOI: 10.1103/PhysRevLett.100.244504 PACS numbers: 47.35.Bb waves in the oceans are generated by oscillatory tides flowing over ocean to- pography
Seasonal variability of water masses and transport on the Antarctic continental shelf and slope in the southeastern Weddell Sea
transport of cold, fresh surface waters onto the continental shelf. Offshore, the warmer, saltier Warm DeepSeasonal variability of water masses and transport on the Antarctic continental shelf and slope masses and transport in the region. Rapid fluctuations in temperature and salinity throughout the year
Topographic Effects on Ambient Dose Equivalent Rates from Radiocesium Fallout
Malins, Alex; Machida, Masahiko; Saito, Kimiaki
Land topography can affect air radiation dose rates by locating radiation sources closer to, or further, from detector locations when compared to perfectly flat terrain. Hills and slopes can also shield against the propagation of gamma rays. To understand the possible magnitude of topographic effects on air dose rates, this study presents calculations for ambient dose equivalent rates at a range of heights above the ground for varying land topographies. The geometries considered were angled ground at the intersection of two planar surfaces, which is a model for slopes neighboring flat land, and a simple conical geometry, representing settings from hilltops to valley bottoms. In each case the radiation source was radioactive cesium fallout, and the slope angle was varied systematically to determine the effect of topography on the air dose rate. Under the assumption of homogeneous fallout across the land surface, and for these geometries and detector locations, the dose rates at high altitudes are more strongly...
Effect of roof slope and thickness on the performance of a saltstone vault
Yu, A.D.; Lam, Poh-Sang; Hsu, R.H.
At the Savannah River Site, low-level radioactive decontaminated salt solution is mixed with slag, flyash, and cement to form a grout-like material called ``Saltstone.`` The Saltstone is poured into concrete vaults constructed at the Saltstone Disposal Facility (SDF). The SDF is designed for the release of contaminants in a slow, controlled manner over thousands of years. The impact of SDF on groundwater has been studied in a radiological performance assessment (PA). Groundwater models were used to predict the fluid flow and contaminant transport at SDF. The models predicted a spatial contaminant concentration distribution in groundwater as a function of time. This study focuses on the roof configuration of Saltstone vault, with special interests in cost-effectiveness. We conducted a study to evaluate the effect of roof slope and thickness on the performance of a Saltstone vault. Four roof configurations were simulated. The tool used for the simulation was ECLIPSE, a finite-difference petroleum reservoir engineering code with an environmental tracer option. Nitrate was used as the ``tracer`` contaminant. In this study, ECLIPSE solves the two-phase two-dimensional flow and transport problem up to 10,000 years. This paper describes a modeling study used to evaluate roof design options for the Saltstone vault.
Geology, reservoir engineering and methane hydrate potential of the Walakpa Gas Field, North Slope, Alaska
Glenn, R.K.; Allen, W.W.
The Walakpa Gas Field, located near the city of Barrow on Alaska's North Slope, has been proven to be methane-bearing at depths of 2000--2550 feet below sea level. The producing formation is a laterally continuous, south-dipping, Lower Cretaceous shelf sandstone. The updip extent of the reservoir has not been determined by drilling, but probably extends to at least 1900 feet below sea level. Reservoir temperatures in the updip portion of the reservoir may be low enough to allow the presence of in situ methane hydrates. Reservoir net pay however, decreases to the north. Depths to the base of permafrost in the area average 940 feet. Drilling techniques and production configuration in the Walakpa field were designed to minimize formation damage to the reservoir sandstone and to eliminate methane hydrates formed during production. Drilling development of the Walakpa field was a sequential updip and lateral stepout from a previously drilled, structurally lower confirmation well. Reservoir temperature, pressure, and gas chemistry data from the development wells confirm that they have been drilled in the free-methane portion of the reservoir. Future studies in the Walakpa field are planned to determine whether or not a component of the methane production is due to the dissociation of updip in situ hydrates.
Proposal for a Universal Test Mirror for Characterization of SlopeMeasuring Instruments
Yashchuk, Valeriy V.; McKinney, Wayne R.; Warwick, Tony; Noll,Tino; Siewert, Frank; Zeschke, Thomas; Geckeler, Ralf D.
The development of third generation light sources like theAdvanced Light Source (ALS) or BESSY II brought to a focus the need forhigh performance synchrotron optics with unprecedented tolerances forslope error and micro roughness. Proposed beam lines at Free ElectronLasers (FEL) require optical elements up to a length of one meter,characterized by a residual slope error in the range of 0.1murad (rms),and rms values of 0.1 nm for micro roughness. These optical elements mustbe inspected by highly accurate measuring instruments, providing ameasurement uncertainty lower than the specified accuracy of the surfaceunder test. It is essential that metrology devices in use at synchrotronlaboratories be precisely characterized and calibrated to achieve thistarget. In this paper we discuss a proposal for a Universal Test Mirror(UTM) as a realization of a high performance calibration instrument. Theinstrument would provide an ideal calibration surface to replicate aredundant surface under test of redundant figure. The application of asophisticated calibration instrument will allow the elimination of themajority of the systematic error from the error budget of an individualmeasurement of a particular optical element. We present the limitationsof existing methods, initial UTM design considerations, possiblecalibration algorithms, and an estimation of the expectedaccuracy.
Steep-Slope Assembly Testing of Clay and Concrete Tile With and Without Cool Pigmented Colors
Miller, William A [ORNL
Cool color pigments and sub-tile venting of clay and concrete tile roofs significantly impact the heat flow crossing the roof deck of a steep-slope roof. Field measures for the tile roofs revealed a 70% drop in the peak heat flow crossing the deck as compared to a direct-nailed asphalt shingle roof. The Tile Roofing Institute (TRI) and its affiliate members are keenly interested in documenting the magnitude of the drop for obtaining solar reflectance credits with state and federal "cool roof" building efficiency standards. Tile roofs are direct-nailed or are attached to a deck with batten or batten and counter-batten construction. S-Misson clay and concrete tile roofs, a medium-profile concrete tile roof, and a flat slate tile roof were installed on fully nstrumented attic test assemblies. Temperature measures of the roof, deck, attic, and ceiling, heat flows, solar reflectance, thermal emittance, and the ambient weather were recorded for each of the tile roofs and also on an adjacent attic cavity covered with a conventional pigmented and directnailed asphalt shingle roof. ORNL measured the tile's underside temperature and the bulk air temperature and heat flows just underneath the tile for batten and counter-batten tile systems and compared the results to the conventional asphalt shingle.
Tax Credits, Rebates & Savings | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
Utility, MunicipalPublic Utility, Utility Savings Category: Fuel Cells, Photovoltaics Alteration of Terrain Permits (New Hampshire) This permit is required whenever a...
(DOE/EIS-0285/SA-12): Supplement Analysis for the Transmission...
Broader source: Energy.gov (indexed) [DOE]
managers. The subject corridor traverses mountainous terrain mostly owned by large timber companies. During routine patrols, tall, encroaching trees and vegetation issues...
A long-term post-project evaluation of an urban stream restoration project (Baxter Creek, El Cerrito, California)
Purcell, Alison
and V. H. Resh. 1992. Strawberry Creek on the University of1995. Biography of an urban creek. Terrain. Berkeley Ecologythe restoration project at Baxter Creek improved habitat and
2011 NERSC NISE Awards Summary Table
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Research Turbulence over complex terrain: a wind energy perspective Dmitry Pekurovsky, University of California San Diego m1243 350,000 ASCR Computer Science Performance...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
control, remote communication, unmanned aerial, and activated delay systems. At the heart of SSFL is a simulated border region of varied terrain including open grassy fields,...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
phenomena and building the foundation for a clear and consistent understanding of this new energy terrain. Beyond this, precision measurements from the ILC could act as a...
Characterization of photochemical pollution at different elevations in mountainous areas in Hong Kong
mountainous terrain Part 2: mesoscale effects, Agr. ForestMany studies showed that mesoscale circulations like sea�when evidence for the mesoscale circulation was clear based
paroissiens de Saint Yves de La Source et de Saint Marceau, pour leur soutien. Sur le terrain, l'acc�s � l
adaptive fast walking: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Electro conditions for stable dynamic walking on irregular terrain in general, and we design the mechanical system and the neural system by comparing biological concepts with...
assessing natural system: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
issue and review of the relevant military vehicle impact literature Alan B. Anderson a,*, Antonio J, and the International Society for Terrain-Vehicle Systems cosponsored a...
Backfill Stress and Strain Information within a Centrifuge Geosynthetic-Reinforced Slope Model under Working Stress and Large Soil Strain Conditions
Zornberg, Jorge G.
Backfill Stress and Strain Information within a Centrifuge Geosynthetic-Reinforced Slope Model with a centrifuge test are used to investigate the mobilization of backfill stress and strain within a geosynthetic a centrifuge GRS slope model. Numerical results indicate that soil stress mobilization can be described
An alternative to the determination of the effective zero point in instrumented indentation: use of the slope of the indentation curve at indentation load values
Paris-Sud XI, Universit� de
of the slope of the indentation curve at indentation load values P. Brammer1,2,* , O. Bartier1 , X. Hernot1 , G on instrumented indentation rely on the knowledge of the indentation load-penetration depth curve corresponding which is based on the slope of the indentation curve at indentation load values and provides accurate
Evaluation of Wax Deposition and Its Control During Production of Alaska North Slope Oils
Tao Zhu; Jack A. Walker; J. Liang
Due to increasing oil demand, oil companies are moving into arctic environments and deep-water areas for oil production. In these regions of lower temperatures, wax deposits begin to form when the temperature in the wellbore falls below wax appearance temperature (WAT). This condition leads to reduced production rates and larger pressure drops. Wax problems in production wells are very costly due to production down time for removal of wax. Therefore, it is necessary to develop a solution to wax deposition. In order to develop a solution to wax deposition, it is essential to characterize the crude oil and study phase behavior properties. The main objective of this project was to characterize Alaskan North Slope crude oil and study the phase behavior, which was further used to develop a dynamic wax deposition model. This report summarizes the results of the various experimental studies. The subtasks completed during this study include measurement of density, molecular weight, viscosity, pour point, wax appearance temperature, wax content, rate of wax deposition using cold finger, compositional characterization of crude oil and wax obtained from wax content, gas-oil ratio, and phase behavior experiments including constant composition expansion and differential liberation. Also, included in this report is the development of a thermodynamic model to predict wax precipitation. From the experimental study of wax appearance temperature, it was found that wax can start to precipitate at temperatures as high as 40.6 C. The WAT obtained from cross-polar microscopy and viscometry was compared, and it was discovered that WAT from viscometry is overestimated. From the pour point experiment it was found that crude oil can cease to flow at a temperature of 12 C. From the experimental results of wax content, it is evident that the wax content in Alaskan North Slope crude oil can be as high as 28.57%. The highest gas-oil ratio for a live oil sample was observed to be 619.26 SCF/STB. The bubblepoint pressure for live oil samples varied between 1600 psi and 2100 psi. Wax precipitation is one of the most important phenomena in wax deposition and, hence, needs to be modeled. There are various models present in the literature. Won's model, which considers the wax phase as a non-ideal solution, and Pedersen's model, which considers the wax phase as an ideal solution, were compared. Comparison indicated that Pedersen's model gives better results, but the assumption of wax phase as an ideal solution is not realistic. Hence, Won's model was modified to consider different precipitation characteristics of the various constituents in the hydrocarbon fraction. The results obtained from the modified Won's model were compared with existing models, and it was found that predictions from the modified model are encouraging.
Ordovician platform, slope, and basin facies in subsurface of southern North America
Alberstadt, L.P.; Colvin, G.; Sauve, J.
Ordovician carbonates of the Nashville dome and Ozark dome regions have long been considered typical shelf deposits. In the subsurface to the south, in the Black Warrior basin, Mississippi Embayment, and Arkoma basin, these shelf carbonate units changed facies. The most significant change is the occurrence of a thick limestone unit characterized by a faunal and floral assemblage of Nuia, Girvanella (isolated long strands), Sphaerocodium, a delicate stacked-chambered organism (.algal), and sponge spicules and sponge mudstone clumps. In ascending order, the complete Ordovician sequence consists of: a lower dolostone, the Nuia-sponge limestone, a dolostone, and a limestone. The upper part of this four-fold sequence changes character westward into the Arkoma basin. The lower two units maintain their character for long distances along depositional strike and occur in parts of the Appalachians as far north as Newfoundland, and on the opposite side of the continent in Nevada. The Nuia-sponge assemblage is a distinctive petrographic marker and seems to be a persistent Ordovician rock and fossil assemblage of widespread occurrence. In Nevada, it occurs on the surface where it is associated with slump and slide features that suggest that it is an outer shelf or upper slope deposit. Coeval carbonates in the Ouachita Mountains are different and show indications of being deep water (basinal). Biostratigraphic evidence indicates that the succession in the subsurface is continuous; the regional Lower Ordovician-Middle Ordovician unconformity is absent. The Lower Ordovician-Middle Ordovician boundary falls near the top of the Nuia-sponge mudstone unit and not at the top of the underlying thick dolostone unit.
Assessment of Alaska's North Slope Oil Field Capacity to Sequester CO{sub 2}
Umekwe, Pascal, E-mail: firstname.lastname@example.com [Baker Hughes (United States)] [Baker Hughes (United States); Mongrain, Joanna, E-mail: email@example.com [Shell International Exploration and Production Co (United States)] [Shell International Exploration and Production Co (United States); Ahmadi, Mohabbat, E-mail: firstname.lastname@example.com [University of Alaska Fairbanks, Petroleum Engineering Department (United States)] [University of Alaska Fairbanks, Petroleum Engineering Department (United States); Hanks, Catherine, E-mail: firstname.lastname@example.com [University of Alaska Fairbanks, Geophysical Institute (United States)] [University of Alaska Fairbanks, Geophysical Institute (United States)
The capacity of 21 major fields containing more than 95% of the North Slope of Alaska's oil were investigated for CO{sub 2} storage by injecting CO{sub 2} as an enhanced oil recovery (EOR) agent. These fields meet the criteria for the application of miscible and immiscible CO{sub 2}-EOR methods and contain about 40 billion barrels of oil after primary and secondary recovery. Volumetric calculations from this study indicate that these fields have a static storage capacity of 3 billion metric tons of CO{sub 2}, assuming 100% oil recovery, re-pressurizing the fields to pre-fracturing pressure and applying a 50% capacity reduction to compensate for heterogeneity and for water invasion from the underlying aquifer. A ranking produced from this study, mainly controlled by field size and fracture gradient, identifies Prudhoe, Kuparuk, and West Sak as possessing the largest storage capacities under a 20% safety factor on pressures applied during storage to avoid over-pressurization, fracturing, and gas leakage. Simulation studies were conducted using CO{sub 2} Prophet to determine the amount of oil technically recoverable and CO{sub 2} gas storage possible during this process. Fields were categorized as miscible, partially miscible, and immiscible based on the miscibility of CO{sub 2} with their oil. Seven sample fields were selected across these categories for simulation studies comparing pure CO{sub 2} and water-alternating-gas injection. Results showed that the top two fields in each category for recovery and CO{sub 2} storage were Alpine and Point McIntyre (miscible), Prudhoe and Kuparuk (partially miscible), and West Sak and Lisburne (immiscible). The study concludes that 5 billion metric tons of CO{sub 2} can be stored while recovering 14.2 billion barrels of the remaining oil.
Moisture effects in low-slope roofs: Drying rates after water addition with various vapor retarders
Pedersen, C.R. [Technical Univ. of Denmark, Lyngby (Denmark); Petrie, T.W. [Marquette Univ., Milwaukee, WI (United States). Dept. of Mechanical Engineering; Courville, G.E.; Desjarlais, A.O.; Childs, P.W.; Wilkes, K.E. [Oak Ridge National Lab., TN (United States)
Tests have been conducted in the Large Scale Climate Simulator (LSCS) of the US. Building Envelope Research Center at the Oak Ridge National Laboratory (ORNL) to investigate downward drying rates of various unvented, low-slope roof systems. A secondary objective was to study heat flow patterns so as to understand how to control latent heat effects on impermeable heat flux transducers. Nine test sections were tested simultaneously. The sections had a p deck above fibrous-glass insulation and were examples of cold-deck systems. These five sections had various vapor retarder systems on a gypsum board ceiling below the insulation. The other four sections had a lightweight insulating concrete deck below expanded polystyrene insulation and the same vapor retarder systems, and were examples of warm-deck systems. The cold-deck systems had materials that were relatively permeable to water vapor, while the materials in the warm-deck systems were less permeable. All test sections were topped by an impermeable roofing membrane. The test sections were instrumented with thermocouples between all layers and with small heat flux transducers at the bottom and top of the fibrous-glass insulation and in the middle of the expanded polystyrene insulation. Two different kinds of moisture probes were used to qualitatively monitor the movement of the moisture. The heat flux measurements showed that heat conduction dominates the system using impermeable insulation materials, with only a slight increase due to increased thermal conductivity of wet expanded polystyrene. There was significant transfer of latent heat in the test sections with permeable insulation, causing the peak heat fluxes to increase by as much as a factor of two. With temperatures imposed that are typical of summer days, latent heat transfer associated with condensation and evaporation of moisture in the test sections was measured to be as important as the heat transfer by conduction.
Cleanup Verification Package for the 118-F-8:4 Fuel Storage Basin West Side Adjacent and Side Slope Soils
L. D. Habel
This cleanup verification package documents completion of remedial action, sampling activities, and compliance with cleanup criteria for the 118-F-8:4 Fuel Storage Basin West Side Adjacent and Side Slope Soils. The rectangular-shaped concrete basin on the south side of the 105-F Reactor building served as an underwater collection, storage, and transfer facility for irradiated fuel elements discharged from the reactor.
Chemical and Microbial Characterization of North Slope Viscous Oils to Assess Viscosity Reduction and Enhanced Recovery
Shirish Patil; Abhijit Dandekar; Mary Beth Leigh
A large proportion of Alaska North Slope (ANS) oil exists in the form of viscous deposits, which cannot be produced entirely using conventional methods. Microbially enhanced oil recovery (MEOR) is a promising approach for improving oil recovery for viscous deposits. MEOR can be achieved using either ex situ approaches such as flooding with microbial biosurfactants or injection of exogenous surfactant-producing microbes into the reservoir, or by in situ approaches such as biostimulation of indigenous surfactant-producing microbes in the oil. Experimental work was performed to analyze the potential application of MEOR to the ANS oil fields through both ex situ and in situ approaches. A microbial formulation containing a known biosurfactant-producing strain of Bacillus licheniformis was developed in order to simulate MEOR. Coreflooding experiments were performed to simulate MEOR and quantify the incremental oil recovery. Properties like viscosity, density, and chemical composition of oil were monitored to propose a mechanism for oil recovery. The microbial formulation significantly increased incremental oil recovery, and molecular biological analyses indicated that the strain survived during the shut-in period. The indigenous microflora of ANS heavy oils was investigated to characterize the microbial communities and test for surfactant producers that are potentially useful for biostimulation. Bacteria that reduce the surface tension of aqueous media were isolated from one of the five ANS oils (Milne Point) and from rock oiled by the Exxon Valdez oil spill (EVOS), and may prove valuable for ex situ MEOR strategies. The total bacterial community composition of the six different oils was evaluated using molecular genetic tools, which revealed that each oil tested possessed a unique fingerprint indicating a diverse bacterial community and varied assemblages. Collectively we have demonstrated that there is potential for in situ and ex situ MEOR of ANS oils. Future work should focus on lab and field-scale testing of ex situ MEOR using Bacillus licheniformis as well as the biosurfactant-producing strains we have newly isolated from the Milne Point reservoir and the EVOS environment.
Variation of Solar Attenuation with Height in CAPLTER The atmosphere over rural and urbanized areas differs in many ways in relation to terrain influences and human-induced variations (e.g., heat, humidity, wind, and pollution). The sun's energy penetrate
Hall, Sharon J.
Variation of Solar Attenuation with Height in CAPLTER Abstract The atmosphere over rural on amounts of solar energy that are accumulated at any given time. These controls range from extraterrestrial of variability cascade into plant productivity, solar energy technology, and urban climate processes, in general
RENFORCEMENT ET CONTROLE DE PAREMENTS DANS UNE MINE A CffiL OUVERT DE CHARBON REINFORCEMENT AND CONTROL OF FOOTWALL SLOPES IN AN OPEN PIT COAL MINE
Paris-Sud XI, Universit� de
AND CONTROL OF FOOTWALL SLOPES IN AN OPEN PIT COAL MINE VERST�RKUNG UND KONTROLLE VON STOSSER IM KOHLETAGEBAU to exploit the stephanian coal.TheNorth West area ofthis open pit is composed of an overthrust fold. The coal
Geochemical assessment of gaseous hydrocarbons: mixing of bacterial and thermogenic methane in the deep subsurface petroleum system, Gulf of Mexico continental slope�
Ozgul, Ercin
Mixtures of bacterial and thermogenic methane are found both at vents at the seafloor and in reservoirs in the deep subsurface of the Gulf of Mexico continental slope. The C1-C5 gas that most recently charged reservoirs ...
The component slope linear model for calculating intensive partial molar properties /application to waste glasses and aluminate solutions
Reynolds, Jacob G. [Washington River Protection Solutions, LLC, Richland, WA (United States)
Partial molar properties are the changes occurring when the fraction of one component is varied while the fractions of all other component mole fractions change proportionally. They have many practical and theoretical applications in chemical thermodynamics. Partial molar properties of chemical mixtures are difficult to measure because the component mole fractions must sum to one, so a change in fraction of one component must be offset with a change in one or more other components. Given that more than one component fraction is changing at a time, it is difficult to assign a change in measured response to a change in a single component. In this study, the Component Slope Linear Model (CSLM), a model previously published in the statistics literature, is shown to have coefficients that correspond to the intensive partial molar properties. If a measured property is plotted against the mole fraction of a component while keeping the proportions of all other components constant, the slope at any given point on a graph of this curve is the partial molar property for that constituent. Actually plotting this graph has been used to determine partial molar properties for many years. The CSLM directly includes this slope in a model that predicts properties as a function of the component mole fractions. This model is demonstrated by applying it to the constant pressure heat capacity data from the NaOH-NaAl(OH){sub 4}-H{sub 2}O system, a system that simplifies Hanford nuclear waste. The partial molar properties of H{sub 2}O, NaOH, and NaAl(OH){sub 4} are determined. The equivalence of the CSLM and the graphical method is verified by comparing results determined by the two methods. The CSLM model has been previously used to predict the liquidus temperature of spinel crystals precipitated from Hanford waste glass. Those model coefficients are re-interpreted here as the partial molar spinel liquidus temperature of the glass components.
0 Riso-R-434 Wind Speed and Direction
meteorological statistics for the area as it was considered a possible site for a nuclear power plant. \\ \\ Duringm I 0 Riso-R-434 t Wind Speed and Direction Changes due to Terrain Effects revealed-4000 Roskilde, Denmark May 1983 #12;RIS�?-R-434 WIND SPEED AND DIRECTION CHANGES DUE TO TERRAIN EFFECTS
Soil mineralogy trends in California landscapes R.C. Graham a,
Ahmad, Sajjad
Soil mineralogy trends in California landscapes R.C. Graham a, , A.T. O'Geen b a Soil & Water soil mineralogical trends: 1) granitic terrain of the Peninsular Ranges, 2) granitic terrain of life. Inherent soil fertility issues are often directly linked to soil mineralogy (e.g., Page et al
164 IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING, VOL. 18, NO. 2, APRIL 2010 Control of a Powered AnkleFoot Prosthesis
Geyer, Hartmut
Control of a Powered Ankle�Foot Prosthesis Based on a Neuromuscular Model Michael F. Eilenberg, Hartmut the difficulties of explicit terrain sensing. Specifically, the energy provided by the prosthesis was directly--Neuromuscular model, powered prosthesis, pros- thesis control, terrain adaptation. I. INTRODUCTION TODAY
American Institute of Aeronautics and Astronautics AIAA-01-4597
Manduchi, Roberto
-situ volcanic rocks on the surface can indicate not only a source region, but can also be #12;American Institute of A are reserved by the copyright owner. AUTONOMOUS ROCK DETECTION FOR MARS TERRAIN Authors: V. Gor, R. Castano, R rock detection process for Martian terrain. A rock detection algorithm, based on this framework
CSc-165 Spring 2014 Week 9(b) Adjusting avatar position in Height Maps
Gordon, Scott
extends AbstractInputAction { private SceneNode avatar; private float s = 0.01f; private Terrain camera code example 4[b]) MoveForwardAction.java: import sage.input.action.AbstractInputAction; import graphicslib3D.Point3D; import graphicslib3D.Matrix3D; import sage.terrain.*; public class MoveForwardAction
Using the ARPS WSR-88D Data Remapper Keith Brewster
Droegemeier, Kelvin K.
variables dealing with the grid spacing, grid location, vertical stretching, terrain and map projection an ARPS terrain-following Cartesian grid. The program reads data from WSR-88D archive level-II tapes, from velocity (ms-1 ) interpolated to the three-dimensional ARPS grid. Optionally, the user may also direct
The Bolund Experiment Design of Measurement Campaign using CFD
determination of mean wind, wind gradients and turbulence intensity on potential wind turbine positions complex terrain for reliable estimation of power production and wind turbine loads. · Development of remote sensing techniques (Lidar) for measuring wind conditions in complex terrain, including
Gas Production From a Cold, Stratigraphically Bounded Hydrate Deposit at the Mount Elbert Site, North Slope, Alaska
Moridis, G.J.; Silpngarmlert, S.; Reagan, M. T.; Collett, T.S.; Zhang, K.
As part of an effort to identify suitable targets for a planned long-term field test, we investigate by means of numerical simulation the gas production potential from unit D, a stratigraphically bounded (Class 3) permafrost-associated hydrate occurrence penetrated in the ount Elbert well on North Slope, Alaska. This shallow, low-pressure deposit has high porosities, high intrinsic permeabilities and high hydrate saturations. It has a low temperature because of its proximity to the overlying permafrost. The simulation results indicate that vertical ells operating at a constant bottomhole pressure would produce at very low rates for a very long period. Horizontal wells increase gas production by almost two orders of magnitude, but production remains low. Sensitivity analysis indicates that the initial deposit temperature is y the far the most important factor determining production performance (and the most effective criterion for target selection) because it controls the sensible heat available to fuel dissociation.
Research on the seasonal snow of the Arctic Slope. Annual progress report, January 16, 1988--December 31, 1988
Benson, C.S.
The original objectives of this research included a regional study of snow on the entire Arctic Slope. During the first year the scope was restricted to the R{sub 4}D area. In the second and third years the primary focus was also on the R{sub 4}D area,but measurements were made at Prudhoe Bay, Atgasuk and Wainwright to determine the flux of wind-blown snow on a wider scale. Additional broadening of scope was discussed at the San Diego R{sub 4}D meetings in April 1986 and 1987 and at the extrapolation workshop held at Penn State University in Spring 1987. The broadening of scope has also included detailed studies of chemistry and controls exerted by large-scale advection of air masses on the longwave, thermal IR, and radiation. The latter phenomena are critical in initiating snowmelt.
Full-Wave Algorithm to Model Effects of Bedding Slopes on the Response of Subsurface Electromagnetic Geophysical Sensors near Unconformities
Sainath, Kamalesh
We propose a full-wave pseudo-analytical numerical electromagnetic (EM) algorithm to model subsurface induction sensors, traversing planar-layered geological formations of arbitrary EM material anisotropy and loss, which are used, for example, in the exploration of hydrocarbon reserves. Unlike past pseudo-analytical planar-layered modeling algorithms that impose parallelism between the formation's bed junctions however, our method involves judicious employment of Transformation Optics techniques to address challenges related to modeling arbitrarily-oriented, relative slope (i.e., tilting) between said junctions. The algorithm exhibits this flexibility, both with respect to anisotropy in the formation layers as well as junction tilting, via employing special planar slabs that coat each "flattened" (i.e., originally tilted) planar interface, locally redirecting the incident wave within the coating slabs to cause wave fronts to interact with the flattened interfaces as if they were still tilted with a specific, ...
Correlations between the nuclear matter symmetry energy, its slope, and curvature from a nonrelativistic solvable approach and beyond
B. M. Santos; M. Dutra; O. Louren�o; A. Delfino
By using point-coupling versions of finite range nuclear relativistic mean field models containing cubic and quartic self interactions in the scalar field $\\sigma$, a nonrelativistic limit is achieved. This approach allows an analytical expression for the symmetry energy ($J$) as a function of its slope ($L$) in a unified form, namely, $\\,L\\,=\\,3J\\,+f(m^{*},\\rho_{o},B_{o},K_{o})$, where the quantities $m^{*}$, $\\rho_{o}$, $B_{o}$ and $K_{o}$ are bulk parameters at the nuclear matter saturation density $\\rho_{o}$. This result establishes a linear correlation between $L$ and $J$ which is reinforced by exact relativistic calculations. An analogous analytical correlation is also found for $J$, $L$ and the symmetry energy curvature ($K_{sym}$). Based on these results, we propose graphic constraints in $L\\times J$ and $K_{sym}\\times L$ planes which finite range models must satisfy.
Theoretical analysis of error transfer from surface slope to refractive ray and their application to the solar concentrated collector
Huang, Weidong
This paper presents the general equation to calculate the standard deviation of reflected ray error from optical error through geometry optics, applying the equation to calculate the standard deviation of reflected ray error for 8 kinds of solar concentrated reflector, provide typical results. The results indicate that the slope errors in two direction is transferred to any one direction of the focus ray when the incidence angle is more than 0 for solar trough and heliostats reflector; for point focus Fresnel lens, point focus parabolic glass mirror, line focus parabolic galss mirror, the error transferring coefficient from optical to focus ray will increase when the rim angle increase; for TIR-R concentrator, it will decrease; for glass heliostat, it relates to the incidence angle and azimuth of the reflecting point. Keywords: optic error, standard deviation, refractive ray error, concentrated solar collector
Spectral analysis of the efficiency of vertical mixing in the deep ocean due to interaction of tidal currents with a ridge running down a continental slope
Ibragimov, Ranis N.; Tartakovsky, Alexandre M.
Efficiency of mixing, resulting from the reflection of an internal wave field imposed on the oscillatory background flow with a three-dimensional bottom topography, is investigated using a linear approximation. The radiating wave field is associated with the spectrum of the linear model, which consists of those mode numbers n and slope values ?, for which the solution represents the internal waves of frequencies ? = n?0 radiating upwrad of the topography, where ?0 is the fundamental frequency at which internal waves are generated at the topography. The effects of the bottom topography and the earth�s rotation on the spectrum is analyzed analytically and numerically in the vicinity of the critical slope, which is a slope with the same angle to the horizontal as the internal wave characteristic. In this notation, ? is latitude, f is the Coriolis parameter and N is the buoyancy frequency, which is assumed to be a constant, which corresponds to the uniform stratification.
Comparison of slope and height profiles for flat synchrotron x-ray mirrors measured with a long trace profiler and a Fizeau interferometer.
Qian, J.; Assoufid, L.; Macrander, A.; X-Ray Science Division
Long trace profilers (LTPS) have been used at many synchrotron radiation laboratories worldwide for over a decade to measure surface slope profiles of long grazing incidence x-ray mirrors. Phase measuring interferometers (PMIs) of the Fizeau type, on the other hand, are being used by most mirror manufacturers to accomplish the same task. However, large mirrors whose dimensions exceed the aperture of the Fizeau interferometer require measurements to be carried out at grazing incidence, and aspheric optics require the use of a null lens. While an LTP provides a direct measurement of ID slope profiles, PMIs measure area height profiles from which the slope can be obtained by a differentiation algorithm. Measurements of the two types of instruments have been found by us to be in good agreement, but to our knowledge there is no published work directly comparing the two instruments. This paper documents that comparison. We measured two different nominally flat mirrors with both the LTP in operation at the Advanced Photon Source (a type-II LTP) and a Fizeau-type PMI interferometer (Wyko model 6000). One mirror was 500 mm long and made of Zerodur, and the other mirror was 350 mm long and made of silicon. Slope error results with these instruments agree within nearly 100% (3.11 {+-} 0.15 {micro}rad for the LTP, and 3.11 {+-} 0.02 {micro}rad for the Fizeau PMI interferometer) for the medium quality Zerodur mirror with 3 {micro}rad rms nominal slope error. A significant difference was observed with the much higher quality silicon mirror. For the Si mirror, slope error data is 0.39 {+-} 0.08 {micro}rad from LTP measurements but it is 0.35 {+-} 0.01 {micro}rad from PMI interferometer measurements. The standard deviations show that the Fizeau PMI interferometer has much better measurement repeatability.
Exports of Alaskan north slope oil. Introduced in the House of Representatives, One Hundred Fourth Congress, First Session, June 15, 1995
The bill addresses H.R. 70 a bill to permit exports of certain domestically produced oil. The background and need for the legislation is provided. The bill would amend the Mineral Leasing Act to allow exports of Alaskan North Slope oil under certain conditions.
The Cascade of Tidal Energy from Low to High Modes on a Continental Slope SAMUEL M. KELLY* AND JONATHAN D. NASH
affiliation: University of Western Australia, Crawley, Australia. Corresponding author address: Samuel M. Kelly, University of Western Australia, M015 SESE, 35 Stirling Hwy., Crawley, WA 6009, Australia. EThe Cascade of Tidal Energy from Low to High Modes on a Continental Slope SAMUEL M. KELLY
Last spring, an Ohio waste slope collapsed, displacing 1.5 million cu yd of waste. Remedial measures can prevent similar failures at ~~grandfathered" landfills.
measures can prevent similar failures at ~~grandfathered" landfills. r I n the early morning hours of March of "grandfathered" landfill slopes. (Grandfathered landfills do not have an engineered liner system.) Because following case history are ap- plicable to the design, operation and expan- sion of many landfills. BEFORE
Dynamic Modeling and Adaptive Neural-Fuzzy Control for Nonholonomic Mobile Manipulators Moving on a Slope 1 Dynamic Modeling and Adaptive Neural-Fuzzy Control for
Li, Yangmin
Dynamic Modeling and Adaptive Neural-Fuzzy Control for Nonholonomic Mobile Manipulators Moving on a Slope 1 Dynamic Modeling and Adaptive Neural-Fuzzy Control for Nonholonomic Mobile Manipulators Moving manipulator, neural-fuzzy control, nonholonomic. 1. INTRODUCTION Intelligent and autonomous mobile
Where does a glacier end ? GPR measurements to identify the limits between the slopes and the real glacier area. Application to
Paris-Sud XI, Universit� de
Where does a glacier end ? GPR measurements to identify the limits between the slopes and the real glacier area. Application to the Austre Lov�enbreen, Spitsbergen Bernard �E. Th�eMA, CNRS/Universit�e de, Orsay, France Abstract Glacier limits are usually mapped according to a spatial discrimination based
Geochemical assessment of gaseous hydrocarbons: mixing of bacterial and thermogenic methane in the deep subsurface petroleum system, Gulf of Mexico continental slope
Ozgul, Ercin
Mixtures of bacterial and thermogenic methane are found both at vents at the seafloor and in reservoirs in the deep subsurface of the Gulf of Mexico continental slope. The C1-C5 gas that most recently charged reservoirs of Jolliet (GC 184), Genesis...
Structure of Turbulence in Katabatic Flows below and above the Wind-Speed Maximum
Grachev, Andrey A; Di Sabatino, Silvana; Fernando, Harindra J S; Pardyjak, Eric R; Fairall, Christopher W
Measurements of small-scale turbulence made over the complex-terrain atmospheric boundary layer during the MATERHORN Program are used to describe the structure of turbulence in katabatic flows. Turbulent and mean meteorological data were continuously measured at multiple levels at four towers deployed along the East lower slope (2-4 deg) of Granite Mountain. The multi-level observations made during a 30-day long MATERHORN-Fall field campaign in September-October 2012 allowed studying of temporal and spatial structure of katabatic flows in detail, and herein we report turbulence and their variations in katabatic winds. Observed vertical profiles show steep gradients near the surface, but in the layer above the slope jet the vertical variability is smaller. It is found that the vertical (normal to the slope) momentum flux and horizontal (along the slope) heat flux in a slope-following coordinate system change their sign below and above the wind maximum of a katabatic flow. The vertical momentum flux is directed...
Geology, reservoir engineering and methane hydrate potential of the Walakpa Gas Field, North Slope, Alaska. Final report
Glenn, R.K.; Allen, W.W.
The Walakpa Gas Field, located near the city of Barrow on Alaska`s North Slope, has been proven to be methane-bearing at depths of 2000--2550 feet below sea level. The producing formation is a laterally continuous, south-dipping, Lower Cretaceous shelf sandstone. The updip extent of the reservoir has not been determined by drilling, but probably extends to at least 1900 feet below sea level. Reservoir temperatures in the updip portion of the reservoir may be low enough to allow the presence of in situ methane hydrates. Reservoir net pay however, decreases to the north. Depths to the base of permafrost in the area average 940 feet. Drilling techniques and production configuration in the Walakpa field were designed to minimize formation damage to the reservoir sandstone and to eliminate methane hydrates formed during production. Drilling development of the Walakpa field was a sequential updip and lateral stepout from a previously drilled, structurally lower confirmation well. Reservoir temperature, pressure, and gas chemistry data from the development wells confirm that they have been drilled in the free-methane portion of the reservoir. Future studies in the Walakpa field are planned to determine whether or not a component of the methane production is due to the dissociation of updip in situ hydrates.
Pattern Alteration: Shoulder Slope
Measurement Chart, for basic instructions. For additional information, refer to E-380, Shoulder Length. Square shoulders are higher than average (Fig. 1). They usually cause a garment to wrinkle and pull from the end of the shoulder toward the center front... the neck for the length of your own shoulder measurement (Fig. 7). Refer to line 8, shoulder length, on your Personal Measurement Chart. 2. Cut the pattern apart along this line, separating the armhole section from the rest of the pattern. To raise...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > The EnergyCenterDioxideDocumentationThreeNewsfuel combustion
Use of field experimental studies to evaluate emergency response models
Gudiksen, P.H.; Lange, R.; Rodriguez, D.J.; Nasstrom, J.S.
The three-dimensional diagnostic wind field model (MATHEW) and the particle-in-cell atmospheric transport and diffusion model (ADPIC) are used by the Atmospheric Release Advisory Capability to estimate the environmental consequences of accidental releases of radioactivity into the atmosphere. These models have undergone extensive evaluations against field experiments conducted in a variety of environmental settings ranging from relatively flat to very complex terrain areas. Simulations of tracer experiments conducted in a complex mountain valley setting revealed that 35 to 50% of the comparisons between calculated and measured tracer concentrations were within a factor of 5. This may be compared with a factor of 2 for 50% of the comparisons for relatively flat terrain. This degradation of results in complex terrain is due to a variety of factors such as the limited representativeness of measurements in complex terrain, the limited spatial resolution afforded by the models, and the turbulence parameterization based on sigma/sub theta/ measurements to evaluate the eddy diffusivities. Measurements of sigma/sub theta/ in complex terrain exceed those measured over flat terrain by a factor of 2 to 3 leading to eddy diffusivities that are unrealistically high. The results of model evaluations are very sensitive to the quality and the representativeness of the meteorological data. This is particularly true for measurements near the source. The capability of the models to simulate the dispersion of an instantaneously produced cloud of particulates was illustrated to be generally within a factor of 2 over flat terrain. 19 refs., 16 figs.
Paleo-reconstruction of shelf-slope margin along San Emigdio Mountains, southern San Joaquin Valley, California
Butler, K.R.
Deformation along the San Emigdio Mountains, California, is characterized by large overthrust sheets that carried Eocene through Miocene nonmarine to shallow marine strata over their deeper marine equivalents. The Pleito thrust has at least 20,000 ft of throw and is the major structural feature of this overthrust belt. The upper plate of the Pleito thrust carries an extensively exposed block of three prograding sequences and, along strike, partially exposes the shelf-slope boundaries of these units. Equivalent changes are observed in the subsurface beneath the overthrust. Total crustal shortening along this region ranges from 25 to 50%, with most of the shortening taken up by the Pleito thrust. The thrust has a low-angle, ramp-and-glide configuration, but on the south, the strata eventually extend downward into basement. The northern boundary to the deformation belt is the White Wolf and Pioneer fold and thrust structures. These features form a transfer zone, where one structure ends and the other feature begins. The amplitude of these folds can be up to 10,000 ft from crest to trough. Because of the large overthrust of the Pleito thrust, reservoir rocks are found up to 7 mi south of the fault's surface trace in the lower plate. The buried strata lie south and west of producing fields along the White Wolf fault and the Tejon embayment. The complicated stratigraphic changes combined with the thrust-belt structures require retrodeformable crustal profiles to take into account the facies distributions to model the hydrocarbon potential of this lightly explored province.
Using a Neural Network to Determine the Hatch Status of the AERI at the ARM North Slope of Alaska Site
Zwink, AB; Turner, DD
The fore-optics of the Atmospheric Emitted Radiance Interferometer (AERI) are protected by an automated hatch to prevent precipitation from fouling the instrument's scene mirror (Knuteson et al. 2004). Limit switches connected with the hatch controller provide a signal of the hatch state: open, closed, undetermined (typically associated with the hatch being between fully open or fully closed during the instrument's sky view period), or an error condition. The instrument then records the state of the hatch with the radiance data so that samples taken when the hatch is not open can be removed from any subsequent analysis. However, the hatch controller suffered a multi-year failure for the AERI located at the ARM North Slope of Alaska (NSA) Central Facility in Barrow, Alaska, from July 2006-February 2008. The failure resulted in misreporting the state of the hatch in the 'hatchOpen' field within the AERI data files. With this error there is no simple solution to translate what was reported back to the correct hatch status, thereby making it difficult for an analysis to determine when the AERI was actually viewing the sky. As only the data collected when the hatch is fully open are scientifically useful, an algorithm was developed to determine whether the hatch was open or closed based on spectral radiance data from the AERI. Determining if the hatch is open or closed in a scene with low clouds is non-trivial, as low opaque clouds may look very similar spectrally as the closed hatch. This algorithm used a backpropagation neural network; these types of neural networks have been used with increasing frequency in atmospheric science applications.
The Impact of Above-Sheathing Ventilation on the Thermal and Moisture Performance of Steep-Slope Residential Roofs and Attics
Miller, W.; Karagiozis, A.; Wilson, J.
THE IMPACT OF ABOVE-SHEATHING VENTILATION ON THE THERMAL AND MOISTURE PERFORMANCE OF STEEP-SLOPE RESIDENTIAL ROOFS AND ATTICS William (Bill) Miller Research Scientist Oak Ridge National Laboratory Oak Ridge, Tennessee Joe Wilson Product... with and without infrared blocking color pigments (IrBCPs) and with and without above-sheathing ventilation. The combination of increased solar reflectance and above-sheathing ventilation reduced the heat flow penetrating the attic floor by 70% as compared...
The Impact of Above-Sheathing Ventilation on the Thermal and Moisture Performance of Steep-Slope Residential Roofs and Attics�
Miller, W.; Karagiozis, A.; Wilson, J.
THE IMPACT OF ABOVE-SHEATHING VENTILATION ON THE THERMAL AND MOISTURE PERFORMANCE OF STEEP-SLOPE RESIDENTIAL ROOFS AND ATTICS William (Bill) Miller Research Scientist Oak Ridge National Laboratory Oak Ridge, Tennessee Joe Wilson Product... Manager Metro Roof Products Oceanside, California Achilles Karagiozis Research Scientist Oak Ridge National Laboratory Oak Ridge, Tennessee ABSTRACT Field studies were conducted on several attic assemblies having stone-coated metal shake roofs...
A cost-effective adverse-weather precision guidance system
Fellerhoff, R.; Burgett, S.
This SAND report documents the results of an LDRD project undertaken to study the accuracy of terrain-aided navigation coupled with highly accurate topographic maps. A revolutionary new mapping technology, interferometric synthetic aperture radar (IFSAR), has the ability to make terrain maps of extremely high accuracy and spatial resolution, more than an order of magnitude better than currently available DMA map products. Using a laser altimeter and the Sandia Labs Twin Otter Radar Testbed, fix accuracies of less than 3 meters CEP were obtained over urban and natural terrain regions.
The Disruption of Vessel-Spanning Bubbles with Sloped Fins in Flat-Bottom and 2:1 Elliptical-Bottom Vessels
Gauglitz, Phillip A.; Buchmiller, William C.; Jenks, Jeromy WJ; Chun, Jaehun; Russell, Renee L.; Schmidt, Andrew J.; Mastor, Michael M.
Radioactive sludge was generated in the K-East Basin and K-West Basin fuel storage pools at the Hanford Site while irradiated uranium metal fuel elements from the N Reactor were being stored and packaged. The fuel has been removed from the K Basins, and currently, the sludge resides in the KW Basin in large underwater Engineered Containers. The first phase to the Sludge Treatment Project being led by CH2MHILL Plateau Remediation Company (CHPRC) is to retrieve and load the sludge into sludge transport and storage containers (STSCs) and transport the sludge to T Plant for interim storage. The STSCs will be stored inside T Plant cells that are equipped with secondary containment and leak-detection systems. The sludge is composed of a variety of particulate materials and water, including a fraction of reactive uranium metal particles that are a source of hydrogen gas. If a situation occurs where the reactive uranium metal particles settle out at the bottom of a container, previous studies have shown that a vessel-spanning gas layer above the uranium metal particles can develop and can push the overlying layer of sludge upward. The major concern, in addition to the general concern associated with the retention and release of a flammable gas such as hydrogen, is that if a vessel-spanning bubble (VSB) forms in an STSC, it may drive the overlying sludge material to the vents at the top of the container. Then it may be released from the container into the cell�s secondary containment system at T Plant. A previous study demonstrated that sloped walls on vessels, both cylindrical coned-shaped vessels and rectangular vessels with rounded ends, provided an effective approach for disrupting a VSB by creating a release path for gas as a VSB began to rise. Based on the success of sloped-wall vessels, a similar concept is investigated here where a sloped fin is placed inside the vessel to create a release path for gas. A key potential advantage of using a sloped fin compared to a vessel with a sloped wall is that a small fin decreases the volume of a vessel available for sludge storage by a very small fraction compared to a cone-shaped vessel. The purpose of this study is to quantify the capability of sloped fins to disrupt VSBs and to conduct sufficient tests to estimate the performance of fins in full-scale STSCs. Experiments were conducted with a range of fin shapes to determine what slope and width were sufficient to disrupt VSBs. Additional tests were conducted to demonstrate how the fin performance scales with the sludge layer thickness and the sludge strength, density, and vessel diameter based on the gravity yield parameter, which is a dimensionless ratio of the force necessary to yield the sludge to its weight.( ) Further experiments evaluated the difference between vessels with flat and 2:1 elliptical bottoms and a number of different simulants, including the KW container sludge simulant (complete), which was developed to match actual K-Basin sludge. Testing was conducted in 5-in., 10-in., and 23-in.-diameter vessels to quantify how fin performance is impacted by the size of the test vessel. The most significant results for these scale-up tests are the trend in how behavior changes with vessel size and the results from the 23-in. vessel. The key objective in evaluating fin performance is to determine the conditions that minimize the volume of a VSB when disruption occurs because this reduces the potential for material inside the STSC from being released through vents.
Advanced Oil Recovery Technologies for Improved Recovery from Slope Basin Clastic Reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, NM
Mark B. Murphy
The Nash Draw Brushy Canyon Pool in Eddy County New Mexico was a cost-shared field demonstration project in the U.S. Department of Energy Class III Program. A major goal of the Class III Program was to stimulate the use of advanced technologies to increase ultimate recovery from slope-basin clastic reservoirs. Advanced characterization techniques were used at the Nash Draw Pool (NDP) project to develop reservoir management strategies for optimizing oil recovery from this Delaware reservoir. The objective of the project was to demonstrate that a development program, which was based on advanced reservoir management methods, could significantly improve oil recovery at the NDP. Initial goals were (1) to demonstrate that an advanced development drilling and pressure maintenance program can significantly improve oil recovery compared to existing technology applications and (2) to transfer these advanced methodologies to other oil and gas producers. Analysis, interpretation, and integration of recently acquired geological, geophysical, and engineering data revealed that the initial reservoir characterization was too simplistic to capture the critical features of this complex formation. Contrary to the initial characterization, a new reservoir description evolved that provided sufficient detail regarding the complexity of the Brushy Canyon interval at Nash Draw. This new reservoir description was used as a risk reduction tool to identify 'sweet spots' for a development drilling program as well as to evaluate pressure maintenance strategies. The reservoir characterization, geological modeling, 3-D seismic interpretation, and simulation studies have provided a detailed model of the Brushy Canyon zones. This model was used to predict the success of different reservoir management scenarios and to aid in determining the most favorable combination of targeted drilling, pressure maintenance, well stimulation, and well spacing to improve recovery from this reservoir. An Advanced Log Analysis technique developed from the NDP project has proven useful in defining additional productive zones and refining completion techniques. This program proved to be especially helpful in locating and evaluating potential recompletion intervals, which has resulted in low development costs with only small incremental increases in lifting costs. To develop additional reserves at lower costs, zones behind pipe in existing wells were evaluated using techniques developed for the Brushy Canyon interval. These techniques were used to complete uphole zones in thirteen of the NDP wells. A total of 14 recompletions were done: four during 1999, four during 2000, two during 2001, and four during 2002-2003. These workovers added reserves of 332,304 barrels of oil (BO) and 640,363 MCFG (thousand cubic feet of gas) at an overall weighted average development cost of $1.87 per BOE (barrel of oil equivalent). A pressure maintenance pilot project in a developed area of the field was not conducted because the pilot area was pressure depleted, and the reservoir in that area was found to be compartmentalized and discontinuous. Economic analyses and simulation studies indicated that immiscible injection of lean hydrocarbon gas for pressure maintenance was not warranted at the NDP and would need to be considered for implementation in similar fields very soon after production has started. Simulation studies suggested that the injection of miscible carbon dioxide (CO{sub 2}) could recover significant quantities of oil at the NDP, but a source of low-cost CO{sub 2} was not available in the area. Results from the project indicated that further development will be under playa lakes and potash areas that were beyond the regions covered by well control and are not accessible with vertical wells. These areas, covered by 3-D seismic surveys that were obtained as part of the project, were accessed with combinations of deviated/horizontal wells. Three directional/horizontal wells have been drilled and completed to develop reserves under surface-restricted areas and potash mines. The third
Resource Characterization and Quantification of Natural Gas-Hydrate and Associated Free-Gas Accumulations in the Prudhoe Bay - Kuparuk River Area on the North Slope of Alaska
Shirish Patil; Abhijit Dandekar
Natural gas hydrates have long been considered a nuisance by the petroleum industry. Hydrates have been hazards to drilling crews, with blowouts a common occurrence if not properly accounted for in drilling plans. In gas pipelines, hydrates have formed plugs if gas was not properly dehydrated. Removing these plugs has been an expensive and time-consuming process. Recently, however, due to the geologic evidence indicating that in situ hydrates could potentially be a vast energy resource of the future, research efforts have been undertaken to explore how natural gas from hydrates might be produced. This study investigates the relative permeability of methane and brine in hydrate-bearing Alaska North Slope core samples. In February 2007, core samples were taken from the Mt. Elbert site situated between the Prudhoe Bay and Kuparuk oil fields on the Alaska North Slope. Core plugs from those core samples have been used as a platform to form hydrates and perform unsteady-steady-state displacement relative permeability experiments. The absolute permeability of Mt. Elbert core samples determined by Omni Labs was also validated as part of this study. Data taken with experimental apparatuses at the University of Alaska Fairbanks, ConocoPhillips laboratories at the Bartlesville Technology Center, and at the Arctic Slope Regional Corporation's facilities in Anchorage, Alaska, provided the basis for this study. This study finds that many difficulties inhibit the ability to obtain relative permeability data in porous media-containing hydrates. Difficulties include handling unconsolidated cores during initial core preparation work, forming hydrates in the core in such a way that promotes flow of both brine and methane, and obtaining simultaneous two-phase flow of brine and methane necessary to quantify relative permeability using unsteady-steady-state displacement methods.
Slope parameter for the differential cross-section for the reaction p + d. -->. X + d in the region of small momentum transfer at Fermilab energies
Akimov, Yu.K.; Bartenev, V.D.; Izyurov, V.M.
A deuterium gas jet target was used in the circulating beam of the Fermilab accelerator to study the M/sup 2//sub x/ and s dependence and the slope parameter for pd ..-->.. Xd in the region 0.025 less than or equal to vertical bar t vertical bar less than or equal to 0.17 (GeV/c)/sup 2/ and 5 less than or equal to M/sup 2//sub x/ less than or equal to 0.068s GeV/sup 2/. A simple parametrization in terms of the variable (1 - x) is found.
Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin), Class III
Dutton, Shirley P.; Flanders, William A.
The objective of this Class III project was demonstrate that reservoir characterization and enhanced oil recovery (EOR) by CO2 flood can increase production from slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico. Phase 1 of the project, reservoir characterization, focused on Geraldine Ford and East Ford fields, which are Delaware Mountain Group fields that produce from the upper Bell Canyon Formation (Ramsey sandstone). The demonstration phase of the project was a CO2 flood conducted in East Ford field, which is operated by Orla Petco, Inc., as the East Ford unit.
Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin), Class III
Dutton, Shirley P.; Flanders, William A.; Mendez, Daniel L.
The objective of this Class 3 project was demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstone's of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost effective way to recover oil more economically through geologically based field development. This project was focused on East Ford field, a Delaware Mountain Group field that produced from the upper Bell Canyon Formation (Ramsey sandstone). The field, discovered in 9160, is operated by Oral Petco, Inc., as the East Ford unit. A CO2 flood was being conducted in the unit, and this flood is the Phase 2 demonstration for the project.
Micro-home ownership in a mega-metropolis
MacCarroll, Christian D. (Christian David)
As a means to keep pace with today's globally networked society, the home is reconceived as a portable, transformable device that adapts and reconfigures itself to coexist within a range of changing terrains. Ownership ...
Department of Intercollege Programs for Science Education 1 | P a g e This Summer 2013 Bulletin includes
Lawrence, Rick L.
appropriate for mixed- weather and rugged terrain. Several classes will travel into high altitude back country repellant, rain/wind protective jacket, warm layer of clothing, and solid-shoes or boots. A hand lens
Niwot Ridge CRN Station Up & On-Line.
Niwot Ridge CRN Station Up & On-Line. I made a decision after the Science Panel Review to put tree removal Wind Speed 3, terrain elevation change Solar Radiation 3, solar shading to west #12;
Applied Studies and Technology Stakeholder Outreach: Helping...
Broader source: Energy.gov (indexed) [DOE]
along the sand riding all-terrain vehicles, rounding up their horses under a ceramic-blue sky. Across a dune ridge, Quentin Benally wipes his brow, adjusts his camo sun hat, and...
Curl Flame Fractal Rib cage and neck of a Cretaceous plesiosaur (elasmosaur)
Machel, Hans
Curl Flame Fractal Rib cage and neck of a Cretaceous plesiosaur (elasmosaur) Fretted terrain (unit of Gusev Crater, Mars narrow channels scarp narrow ridge Basin Floor Assemblage Basin oor unit 1--Forms
An Integrated Assessment of the Influences of Upland Thermal-Erosional Features on Landscape Structure and Function in the Foothills of the Brooks Range, Alaska
Crosby, Benjamin T.
The Rubenstein School of Environment and Natural Resources, University of Vermont, USA B.T. Crosby, K. Krieger in foothill and mountain terrain are less well known than similar dynamics on coastal plains and peat plateaus
airborne lidar mapping: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
A minimum height of 1 m was applied to define woody understorey. Critical to this process were a Digital Terrain Model (extracted from the leaf-off last return LiDAR data)...
altitude wind tunnel: Topics by E-print Network
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Helens Using NASA SRTM Digital Terrain Model M Alberta, University of 2 Utilization of Wind Energy at High Altitude Physics (arXiv) Summary: Ground based, wind energy extraction...
Between nature and artifice : The Landscape Architecture Research Office (1966-1979)
McMahon, Catherine F. (Catherine Fae)
Cambridge in the 1960s was a locus of experimentation and research in new computing technologies -from the production of transportation models for New England to the design of war games simulating the vagaries of the terrain ...
Rampart craters on Ganymede: Their implications for fluidized ejecta emplacement Joseph BOYCE1*
Stewart, Sarah T.
on Ganymede have the overall ejecta morphology similar to Martian double-layer ejecta (DLE and the concentration of Martian DLE craters on the northern lowlands suggests that these terrains may share key
Estimation of ground reaction force and zero moment point on a powered ankle-foot prosthesis
Martinez Villalpando, Ernesto Carlos
Commercially available ankle-foot prostheses are passive when in contact with the ground surface, and thus, their mechanical properties remain fixed across different terrains and walking speeds. The passive nature of these ...
Discovering Controlling Factors of Geospatial Variables Tomasz Stepinski
Eick, Christoph F.
as well as a practical point of view, such as the impact of global warming on vegetation cover. Currently describing terrain topography, climate, vegetation cover, lithology, soil properties, human impact, etc
This is an author-formatted version. The original publication is available at www.springerlink.com. ISVC 2011, Part II, LNCS 6939, pp. 45-54.
Borst, Christoph Walter
tracking precision and display sizes. Fig. 1. Left: Low-cost well log visualization system (Mitsubishi 3D) hanging under- neath a terrain generated from SRTM (Shuttle Radar Topography Mission) data. The iPod Touch
Raina, Ramesh
wonderland, and explore the varied terrain of Nuku Hiva, from its black sand beaches to deep bays control supplying any services or providing any goods offered or included. GN and the sponsoring
Safety posters | Argonne National Laboratory
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
the chance of accidents and hybrid tires keep me ready for any type of terrain - pavement or gravel. I always check for property inflated tires before I hit the road because...
Control of a Powered Ankle�Foot Prosthesis Based on a Neuromuscular Model
Geyer, Hartmut
Control schemes for powered ankle-foot prostheses rely upon fixed torque-ankle state relationships obtained from measurements of intact humans walking at target speeds and across known terrains. Although effective at their ...
Autonomous underwater vehicle navigation and mapping in dynamic, unstructured environments
Kunz, Clayton Gregory
This thesis presents a system for automatically building 3-D optical and bathymetric maps of underwater terrain using autonomous robots. The maps that are built improve the state of the art in resolution by an order of ...
The opportunistic green : building on Toronto's utility corridor
Rahimi, Kamyar
The Green Line or hydro corridors of Toronto are sprawling lengths of continuous, mostly vacant land used for the primary purpose of transmitting electricity. They are unusual terrain, physically sparse but culturally ...
The journey from New Delhi to Islamabad : dependence and subversion in the ambivalent expression of nationhood
Ahmed, Imran
This thesis addresses the critical terrain on which the colonial and post-colonial narratives of identity take shape. Taking Gayatri Spivak's aphorism that imperialism requires a rereading "not because Empire ..... is ...
Numerical simulation of the 16-19 October 1994 southeast Texas heavy rain event: precipitation results and diagnosis of the lifting mechanism
Petroski, Thomas John
During the period 16-19 October 1994, a mesoscale convective system (MCS) developed within a weakly forced large-scale environment over relatively flat terrain. This resulted in extreme rainfall totals and subsequent widespread flash flooding...
E N G I N E E R I N G T H E F U T U R E O F R O B O T I C S Highly mobile &
Gupta, Abhinav
, reconnaissance, surveillance, and work in hazardous environments A removable battery pack is the only component-wheeled Mini Crusher easily tackles gravel and other challenging terrain and literally turns on a dime. #12;
Stochastic approaches to mobility prediction, path planning and motion control for ground vehicles in uncertain environments
Kewlani, Gaurav
The ability of autonomous or semi-autonomous unmanned ground vehicles (UGVs) to rapidly and accurately predict terrain negotiability, generate efficient paths online and have effective motion control is a critical requirement ...
Smith, David
All-terrain vehicles are very popular for off-road recreation. However, the number of injuries and deaths from ATV accidents is growing rapidly. This publication lists the causes of injuries and fatalities, discusses Texas ATV laws, and provides...
Ickert-Bond, Steffi
Beluga Field Ice Rink Townshend Point THOMPSON DRIVE TROTH YEDDHA' PARK HULBERT NANOOK TERRAIN PARK Nerland McIntosh Stevens Ice Arena Lola Tilly Student Recreation Center WestRidge Research Wickersham
Landscapes as references for design
Batchelor, James P
This is a study of the ways in which the forms in landscapes - natural terrain adapted and inhabited - can serve as references in architectural design. As references for design, landscapes provide a richness of responses ...
Singh, Jaswinder Pal
Cellular... So far in class, you've talked a lot about cellular service: Cellular towers receive voice antennas available Looking at 802.11 or VHF transmission Difficult terrain Power generation & storage
be virtually impossible to construct land lines and microwave networks in the
Brewer, Eric A.
) with a microwave radio transmission tail is not suit- able for very harsh terrain, or for locations that are more. The use of microwave repeater towers, requiring line- of-sight from one tower to the next, was ruled out
Abad-Manterola, Pablo
Recent scientific findings suggest that some of the most interesting sites for future exploration of planetary surfaces lie in terrains that are currently inaccessible to conventional robotic rovers. To provide robust and ...
Tradespace model for planetary surface exploration hopping vehicles
Cunio, Phillip M
Robotic planetary surface exploration, which has greatly benefited humankind's scientific knowledge of the solar system, has to date been conducted by sedentary landers or by slow, terrain-limited rovers. However, there ...
What can I do with this degree? AREAS EMPLOYERS
Escher, Christine
Planning Environmental Impact Terrain and Land Use PHYSICAL/ENVIRONMENTAL Federal government Publishers or companies in insurance, environmental work, transportation, communications and international trade language, history, customs, and culture. #12;(Geography, Page 2) STRATEGIESEMPLOYERS CARTOGRAPHY Mosaics
Development of an Independent Hip Drive for a 2D Biped Walking Machine
Rooney, Craig
and Automation Laboratory (ISAL) at the University of Kansas has developed a two dimensional (2D) biped walker, nicknamed the Jaywalker, in order to study the requirements necessary for a bipedal robot to traverse uneven terrain and successfully regain stability...
A parametric analysis of the start-up procedure and flight characteristics of a gliding autogyro
Oliver, Michael, 1981-
Currently, Draper Laboratory is in the development stages of a gliding autogyro airdrop system. The goal of the project is to design a platform capable of placing small, high value items into urban terrain. Theoretically, ...
Project EARTH-12-PPS1: Weathering Rates in the Critical Zone: Soil Erosion, River Chemistry and Climate
Henderson, Gideon
Project EARTH-12-PPS1: Weathering Rates in the Critical Zone: Soil Erosion, River Chemistry., Assessing the role of climate on uranium and lithium isotope behaviour in rivers draining a basaltic terrain
Urban Reclamation in S�o Paulo
Eskinazi, Victor
The urbanized terrain of S�o Paulo is characterized by wasteful landscapes on peripheral areas of the metropolitan agglomeration, and decaying landscapes of waste in the core of the city. If on the one hand, the increasingly ...
J Glob Optim DOI 10.1007/s10898-007-9206-5
Lucia, Angelo
conformations of united atom n-alkane models for diesel, home heating, and residual fuel oils. The terrain of petroleum or hydrocarbon fuels such as home heating and diesel fuels is a nag- ging and costly problem
~mcupkric EnviroMvnr Vol. IS. No. IO, pp. 1969-2002. 1984 Pnnted in Great Britain.
Hunt, Julian
~mcupkric EnviroMvnr Vol. IS. No. IO, pp. 1969-2002. 1984 Pnnted in Great Britain. ocKJ4-6981/84 13 diffusion, stratified flow, wind tunnel, towing tank, complex terrain, air pollution. NOMENCLATURE constant
Smith, David
All-terrain vehicles are very popular for off-road recreation. However, the number of injuries and deaths from ATV accidents is growing rapidly. This publication lists the causes of injuries and fatalities, discusses Texas ATV laws, and provides...
Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]
Low-Speed Vehicle Access to Roadways A low-speed vehicle is defined as a four-wheeled motor vehicle, other than an all-terrain vehicle, that is capable of reaching speeds of at...
Simulated Interdiction: Proliferation Security Initiative�
Gassam, Geraldine; Jacob, Savio; Jenecka, Bobby; Lanzing, Kevin; Lee, Jeonghoon; Reves, Nick; Slanker, Julie; Trojan, Anthony; Wismer, Ryan
of the European Union. Terrain: Vast central plains, mountains in West, hills and low mountains in east; rugged mountains and broad river valleys in Alaska, rugged volcanic topography in Hawaii. Border Length: Canada 8,893 kilometers, Mexico 3,141 kilometers... Area: approximately 17 million square kilometers. Terrain: broad plains with low hills west of primary mountain range; vast coniferous forest and tundra in central northern territory; uplands and mountains along southern border regions Border Length...
Ura, Karma
followed by guerrillas, waged by the Bhutanese militia in rugged terrain. Though not written in accounts of any battles, the form of war oral sources describe suggest unconventional warfare. The natural defence position of the terrain combined with its... nor poverty in the areas adjacent to Bhutan, which are the ultimate causes of the current security problems Bhutan faces, are unfortunately on decline. Journal of Bhutan Studies 136 On the other hand, Bhutan, like several small states, has been...
COMIT FRANAIS D'HISTOIRE DE LA GOLOGIE -Troisime srie -
Boyer, Edmond
(COFRHIGEO) (séance du 25 novembre 1992) Un géologue d'avant-garde. Il n'est que temps de rendre pleinement leur piémont, il y distingue sur des bases rationnelles dans le sous-sol, quatre "ordres" de terrains monti terziari (correspondant à des collines) ; et les terrains du "quatrième ordre" (il quatro ordine
Obstacle detection for autonomous navigation : an LDRD final report.
Padilla, Denise D.
This report summarizes the analytical and experimental efforts for the Laboratory Directed Research and Development (LDRD) project entitled 'Obstacle Detection for Autonomous Navigation'. The principal goal of this project was to develop a mathematical framework for obstacle detection. The framework provides a basis for solutions to many complex obstacle detection problems critical to successful autonomous navigation. Another goal of this project was to characterize sensing requirements in terms of physical characteristics of obstacles, vehicles, and terrain. For example, a specific vehicle traveling at a specific velocity over a specific terrain requires a sensor with a certain range of detection, resolution, field-of-view, and sufficient sensitivity to specific obstacle characteristics. In some cases, combinations of sensors were required to distinguish between different hazardous obstacles and benign terrain. In our framework, the problem was posed as a multidimensional, multiple-hypothesis, pattern recognition problem. Features were extracted from selected sensors that allow hazardous obstacles to be distinguished from benign terrain and other types of obstacles. Another unique thrust of this project was to characterize different terrain classes with respect to both positive (e.g., rocks, trees, fences) and negative (e.g., holes, ditches, drop-offs) obstacles. The density of various hazards per square kilometer was statistically quantified for different terrain categories (e.g., high desert, ponderosa forest, and prairie). This quantification reflects the scale, or size, and mobility of different types of vehicles. The tradeoffs between obstacle detection, position location, path planning, and vehicle mobility capabilities were also to be characterized.
Phase Behavior, Solid Organic Precipitation, and Mobility Characterization Studies in Support of Enhanced Heavy Oil Recovery on the Alaska North Slope
Shirish Patil; Abhijit Dandekar; Santanu Khataniar
The medium-heavy oil (viscous oil) resources in the Alaska North Slope are estimated at 20 to 25 billion barrels. These oils are viscous, flow sluggishly in the formations, and are difficult to recover. Recovery of this viscous oil requires carefully designed enhanced oil recovery processes. Success of these recovery processes is critically dependent on accurate knowledge of the phase behavior and fluid properties, especially viscosity, of these oils under variety of pressure and temperature conditions. This project focused on predicting phase behavior and viscosity of viscous oils using equations of state and semi-empirical correlations. An experimental study was conducted to quantify the phase behavior and physical properties of viscous oils from the Alaska North Slope oil field. The oil samples were compositionally characterized by the simulated distillation technique. Constant composition expansion and differential liberation tests were conducted on viscous oil samples. Experiment results for phase behavior and reservoir fluid properties were used to tune the Peng-Robinson equation of state and predict the phase behavior accurately. A comprehensive literature search was carried out to compile available compositional viscosity models and their modifications, for application to heavy or viscous oils. With the help of meticulously amassed new medium-heavy oil viscosity data from experiments, a comparative study was conducted to evaluate the potential of various models. The widely used corresponding state viscosity model predictions deteriorate when applied to heavy oil systems. Hence, a semi-empirical approach (the Lindeloff model) was adopted for modeling the viscosity behavior. Based on the analysis, appropriate adjustments have been suggested: the major one is the division of the pressure-viscosity profile into three distinct regions. New modifications have improved the overall fit, including the saturated viscosities at low pressures. However, with the limited amount of geographically diverse data, it is not possible to develop a comprehensive predictive model. Based on the comprehensive phase behavior analysis of Alaska North Slope crude oil, a reservoir simulation study was carried out to evaluate the performance of a gas injection enhanced oil recovery technique for the West Sak reservoir. It was found that a definite increase in viscous oil production can be obtained by selecting the proper injectant gas and by optimizing reservoir operating parameters. A comparative analysis is provided, which helps in the decision-making process.
Seed rain and seed bank of third- and fifth-order streams on the western slope of the cascade range. Forest Service research paper
Harmon, J.M.; Franklin, J.F.
The authors compared the composition and density of the on-site vegetation, seed bank, and seed rain of three geomorphic and successional surfaces along third- and fifth- order streams on the western slope of the Cascade Range in Oregon. The on-site vegetation generally was dominated by tree species, the seed bank by herb species, and the seed rain by tree and herb species. Seed rain density generally correspond to the successional stage of the geomorphic surface and frequency of site disturbance, with the youngest and least vegetatively stable geomorphic surfaces having the highest density of trapped viable seeds. The highest density and greatest species richness of seed germinants were found on the intermediate-aged geomorphic surfaces, which had moderate levels of disturbance.
Application of advanced reservoir characterization, simulation, and production optimization strategies to maximize recovery in slope and basin clastic reservoirs, West Texas (Delaware Basin), Class III
Dutton, Shirley P.; Flanders, William A.; Zirczy, Helena H.
The objective of this Class 3 project was to demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost effective way to recover a higher percentage of the original oil in place through strategic placement of infill wells and geologically based field development. Phase 1 of the project, reservoir characterization, was completed this year, and Phase 2 began. The project is focused on East Ford field, a representative Delaware Mountain Group field that produces from the upper Bell Canyon Formation (Ramsey sandstone). The field, discovered in 1960, is operated by Oral Petco, Inc., as the East Ford unit. A CO{sub 2} flood is being conducted in the unit, and this flood is the Phase 2 demonstration for the project.
Evaluation of a deposit in the vicinity of the PBU L-106 Site, North Slope, Alaska, for a potential long-term test of gas production from hydrates
Moridis, G.J.; Reagan, M.T.; Boyle, K.L.; Zhang, K.
As part of the effort to investigate the technical feasibility of gas production from hydrate deposits, a long-term field test (lasting 18-24 months) is under consideration in a project led by the U.S. Department of Energy. We evaluate a candidate deposit involving the C-Unit in the vicinity of the PBU-L106 site in North Slope, Alaska. This deposit is stratigraphically bounded by impermeable shale top and bottom boundaries (Class 3), and is characterized by high intrinsic permeabilities, high porosity, high hydrate saturation, and a hydrostatic pressure distribution. The C-unit deposit is composed of two hydrate-bearing strata separated by a 30-ft-thick shale interlayer, and its temperatrure across its boundaries ranges between 5 and 6.5 C. We investigate by means of numerical simulation involving very fine grids the production potential of these two deposits using both vertical and horizontal wells. We also explore the sensitivity of production to key parameters such as the hydrate saturation, the formation permeability, and the permeability of the bounding shale layers. Finally, we compare the production performance of the C-Unit at the PBU-L106 site to that of the D-Unit accumulation at the Mount Elbert site, a thinner, single-layer Class 3 deposit on the North Slope of Alaska that is shallower, less-pressurized and colder (2.3-2.6 C). The results indicate that production from horizontal wells may be orders of magnitude larger than that from vertical ones. Additionally, production increases with the formation permeability, and with a decreasing permeability of the boundaries. The effect of the hydrate saturation on production is complex and depends on the time frame of production. Because of higher production, the PBU-L106 deposit appears to have an advantage as a candidate for the long-term test.
Assessment of costs and benefits of flexible and alternative fuel use in the US transportation sector. Technical report twelve: Economic analysis of alternative uses for Alaskan North Slope natural gas
Not Available
As part of the Altemative Fuels Assessment, the Department of Energy (DOE) is studying the use of derivatives of natural gas, including compressed natural gas and methanol, as altemative transportation fuels. A critical part of this effort is determining potential sources of natural gas and the economics of those sources. Previous studies in this series characterized the economics of unutilized gas within the lower 48 United States, comparing its value for methanol production against its value as a pipelined fuel (US Department of Energy 1991), and analyzed the costs of developing undeveloped nonassociated gas reserves in several countries (US Department of Energy 1992c). This report extends those analyses to include Alaskan North Slope natural gas that either is not being produced or is being reinjected. The report includes the following: A description of discovered and potential (undiscovered) quantities of natural gas on the Alaskan North Slope. A discussion of proposed altemative uses for Alaskan North Slope natural gas. A comparison of the economics of the proposed alternative uses for Alaskan North Slope natural gas. The purpose of this report is to illustrate the costs of transporting Alaskan North Slope gas to markets in the lower 48 States as pipeline gas, liquefied natural gas (LNG), or methanol. It is not intended to recommend one alternative over another or to evaluate the relative economics or timing of using North Slope gas in new tertiary oil recovery projects. The information is supplied in sufficient detail to allow incorporation of relevant economic relationships (for example, wellhead gas prices and transportation costs) into the Altemative Fuels Trade Model, the analytical framework DOE is using to evaluate various policy options.
IJOPE Paper No JC-343AB-final 9/26/04 Biausser Page number 1 Numerical Analysis of the Internal Kinematics and Dynamics of 3D Breaking Waves on Slopes
Grilli, Stéphan T.
Kinematics and Dynamics of 3D Breaking Waves on Slopes Benjamin Biausser1 , Stéphan T. Grilli2 , Philippe and internal kinematics (velocity, vorticity, pressure) are presented. KEY WORDS: breaking ocean waves years, our understanding of wave breaking dynamics and kinematics is still quite incomplete. Due
The effects of digital elevation model resolution on the calculation and predictions of topographic wetness indices.
Drover, Damion, Ryan
One of the largest exports in the Southeast U.S. is forest products. Interest in biofuels using forest biomass has increased recently, leading to more research into better forest management BMPs. The USDA Forest Service, along with the Oak Ridge National Laboratory, University of Georgia and Oregon State University are researching the impacts of intensive forest management for biofuels on water quality and quantity at the Savannah River Site in South Carolina. Surface runoff of saturated areas, transporting excess nutrients and contaminants, is a potential water quality issue under investigation. Detailed maps of variable source areas and soil characteristics would therefore be helpful prior to treatment. The availability of remotely sensed and computed digital elevation models (DEMs) and spatial analysis tools make it easy to calculate terrain attributes. These terrain attributes can be used in models to predict saturated areas or other attributes in the landscape. With laser altimetry, an area can be flown to produce very high resolution data, and the resulting data can be resampled into any resolution of DEM desired. Additionally, there exist many maps that are in various resolutions of DEM, such as those acquired from the U.S. Geological Survey. Problems arise when using maps derived from different resolution DEMs. For example, saturated areas can be under or overestimated depending on the resolution used. The purpose of this study was to examine the effects of DEM resolution on the calculation of topographic wetness indices used to predict variable source areas of saturation, and to find the best resolutions to produce prediction maps of soil attributes like nitrogen, carbon, bulk density and soil texture for low-relief, humid-temperate forested hillslopes. Topographic wetness indices were calculated based on the derived terrain attributes, slope and specific catchment area, from five different DEM resolutions. The DEMs were resampled from LiDAR, which is a laser altimetry remote sensing method, obtained from the USDA Forest Service at Savannah River Site. The specific DEM resolutions were chosen because they are common grid cell sizes (10m, 30m, and 50m) used in mapping for management applications and in research. The finer resolutions (2m and 5m) were chosen for the purpose of determining how finer resolutions performed compared with coarser resolutions at predicting wetness and related soil attributes. The wetness indices were compared across DEMs and with each other in terms of quantile and distribution differences, then in terms of how well they each correlated with measured soil attributes. Spatial and non-spatial analyses were performed, and predictions using regression and geostatistics were examined for efficacy relative to each DEM resolution. Trends in the raw data and analysis results were also revealed.
Simulations of Variable Bottomhole Pressure Regimes to Improve Production from the Double-Unit Mount Elbert, Milne Point Unit, North Slope Alaska Hydrate Deposit
Myshakin, Evgeniy; Anderson, Brian; Rose, Kelly; Boswell, Ray
Gas production was predicted from a reservoir model based on the Mount Elbert gas hydrate accumulation located on the Alaska North slope at various simulator submodels and production scenarios. Log, core, and fluid measurements were used to provide a comprehensive reservoir description. These data were incorporated with experimentally derived saturations, porosities, permeability values, parameters for capillary pressure, and relative permeability functions. The modeled reservoir exposed to depressurization at a constant bottomhole pressure (2.7 MPa) has shown limited production potential due to its low temperature profile. To improve production the bottomhole pressure was allowed to vary from 2.7 (above the quadruple point) to 2.0 MPa over a 15-year period. The results indicate that gas production was nearly doubled in comparison with a constant-pressure regime. Extensive ice formation and hydrate reformation that could severely hinder gas production were avoided in the variable-pressure regime system. A use of permeability variation coupled with porosity change is shown to be crucial to predict those phenomena at a reservoir scale.
Evaluating benefits of slope rounding
Liu, Jichuan
of Unrounded Option, d?= 0 ft (0 m) 2. HVOSM Simulation of Constant Rounding, d, = 2 ft (0. 61 m) 15 16 3. HVOSM Simulation of Optimum Rounding 17 4. HVOSM Simulation of Unrounded Option, Honda Civic with a "Return-to-the-Road" Steer Angle of 8 Degrees 24... 5. HVOSM Simulation of 2 ft (0. 61 m) Constant Rounding, Honda Civic with a "Return-to-the-Road" Steer Angle of 8 Degrees 25 6. HVOSM Simulation of 4 ft (1. 22 m) Constant Rounding, Honda Civic with a "Return-to-the-Road" Steer Angle of 8 Degrees...
Source Characterization and Temporal Variation of Methane Seepage from Thermokarst Lakes on the Alaska North Slope in Response to Arctic Climate Change
The goals of this research were to characterize the source, magnitude and temporal variability of methane seepage from thermokarst lakes (TKL) within the Alaska North Slope gas hydrate province, assess the vulnerability of these areas to ongoing and future arctic climate change and determine if gas hydrate dissociation resulting from permafrost melting is contributing to the current lake emissions. Analyses were focused on four main lake locations referred to in this report: Lake Qalluuraq (referred to as Lake Q) and Lake Teshekpuk (both on Alaska?s North Slope) and Lake Killarney and Goldstream Bill Lake (both in Alaska?s interior). From analyses of gases coming from lakes in Alaska, we showed that ecological seeps are common in Alaska and they account for a larger source of atmospheric methane today than geologic subcap seeps. Emissions from the geologic source could increase with potential implications for climate warming feedbacks. Our analyses of TKL sites showing gas ebullition were complemented with geophysical surveys, providing important insight about the distribution of shallow gas in the sediments and the lake bottom manifestation of seepage (e.g., pockmarks). In Lake Q, Chirp data were limited in their capacity to image deeper sediments and did not capture the thaw bulb. The failure to capture the thaw bulb at Lake Q may in part be related to the fact that the present day lake is a remnant of an older, larger, and now-partially drained lake. These suggestions are consistent with our analyses of a dated core of sediment from the lake that shows that a wetland has been present at the site of Lake Q since approximately 12,000 thousand years ago. Chemical analyses of the core indicate that the availability of methane at the site has changed during the past and is correlated with past environmental changes (i.e. temperature and hydrology) in the Arctic. Discovery of methane seeps in Lake Teshekpuk in the northernmost part of the lake during 2009 reconnaissance surveys provided a strong impetus to visit this area in 2010. The seismic methods applied in Lake Teshekpuk were able to image pockmarks, widespread shallow gas in the sediments, and the relationship among different sediment packages on the lake?s bottom, but even boomer seismics did not detect permafrost beneath the northern part of the lake. By characterizing the biogeochemistry of shallow TKL with methane seeps we showed that the radical seasonal shifts in ice cover and temperature. These seasonal environmental differences result in distinct consumption and production processes of biologically-relevant compounds. The combined effects of temperature, ice-volume and other lithological factors linked to seepage from the lake are manifest in the distribution of sedimentary methane in Lake Q during icecovered and ice-free conditions. The biogeochemistry results illustrated very active methanotrophy in TKLs. Substantial effort was subsequently made to characterize the nature of methanotrophic communities in TKLs. We applied stable isotope probing approaches to genetically characterize the methanotrophs most active in utilizing methane in TKLs. Our study is the first to identify methane oxidizing organisms active in arctic TKLs, and revealing that type I methanotrophs and type II methanotrophs are abundant and active in assimilating methane in TKLs. These organisms play an important role in limiting the flux of methane from these sites. Our investigations indicate that as temperatures increase in the Arctic, oxidation rates and active methanotrophic populations will also shift. Whether these changes can offset predicted increases in methanogenesis is an important question underlying models of future methane flux and resultant climate change. Overall our findings indicate that TKLs and their ability to act as both source and sink of methane are exceedingly sensitive to environmental change.
Solid bitumen at Atigun Gorge, central Brooks Range front: Implications for oil exploration in the North Slope fold and thrust belt
Howell, D.G.; Johnsson, M.J.; Bird, K.J. (U.S. Geological Survey, Menlo Park, CA (United States))
The Atigun Gorge area of the north-central Brooks range is a structurally complex region in which a sequence of north-verging duplex structures involving Paleozoic and Mesozoic Ellesmerian continental margin deposits are structurally overlain by a south-verging thrust of Brookian foreland basin deposits of Albian age. The resulting structural triangle zone is marked by numerous small-scale thrusts involving Permian and Triassic strata in which solid bitumen, occupying fissures up to 10 cm wide and several meters in length, has been found. The presence of aromatics in the odorless, black material was confirmed by ultraviolet fluorescence following extraction in dichloromethane. The occurrence of solid bitumen at Atigun Gorge adds to a growing inventory of hydrocarbon-filled fractures found mostly in Cretaceous rocks in the Brooks Range foothills. These occurrences are consistent with a model of hydrocarbon generation beneath the northern margin of the Brooks Range. The regional distribution of vitrinite reflectance isograds suggests that the northern margin of the Brooks Range and the adjoining foreland basin deposits of the North Slope have experienced similar thermal histories. The 0.6% vitrinite reflectance isograd intersects the land surface along the southern margin of the foreland and the 2.0% isograd lies within the northern part of the range. Although these relations suggest the possibility of petroleum resources at shallow depths beneath the Brooks Range foothills, they also indicate that a considerable amount of differential uplift has occurred, probably resulting in redistribution and some leakage of any oil and gas accumulations.
Robert Hunter; Shirish Patil; Robert Casavant; Tim Collett
Interim results are presented from the project designed to characterize, quantify, and determine the commercial feasibility of Alaska North Slope (ANS) gas-hydrate and associated free-gas resources in the Prudhoe Bay Unit (PBU), Kuparuk River Unit (KRU), and Milne Point Unit (MPU) areas. This collaborative research will provide practical input to reservoir and economic models, determine the technical feasibility of gas hydrate production, and influence future exploration and field extension of this potential ANS resource. The large magnitude of unconventional in-place gas (40-100 TCF) and conventional ANS gas commercialization evaluation creates industry-DOE alignment to assess this potential resource. This region uniquely combines known gas hydrate presence and existing production infrastructure. Many technical, economical, environmental, and safety issues require resolution before enabling gas hydrate commercial production. Gas hydrate energy resource potential has been studied for nearly three decades. However, this knowledge has not been applied to practical ANS gas hydrate resource development. ANS gas hydrate and associated free gas reservoirs are being studied to determine reservoir extent, stratigraphy, structure, continuity, quality, variability, and geophysical and petrophysical property distribution. Phase 1 will characterize reservoirs, lead to recoverable reserve and commercial potential estimates, and define procedures for gas hydrate drilling, data acquisition, completion, and production. Phases 2 and 3 will integrate well, core, log, and long-term production test data from additional wells, if justified by results from prior phases. The project could lead to future ANS gas hydrate pilot development. This project will help solve technical and economic issues to enable government and industry to make informed decisions regarding future commercialization of unconventional gas-hydrate resources.
Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin).
Dutton, S.P.
The objective of this project is to demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost effective way to recover a higher percentage of the original oil in place through strategic placement of infill wells and geologically based field development. Project objectives are divided into two major phases. The objectives of the reservoir characterization phase of the project are to provide a detailed understanding of the architecture and heterogeneity of two fields, the Ford Geraldine unit and Ford West field, which produce from the Bell Canyon and Cherry Canyon Formations, respectively, of the Delaware Mountain Group and to compare Bell Canyon and Cherry Canyon reservoirs. Reservoir characterization will utilize 3-D seismic data, high-resolution sequence stratigraphy, subsurface field studies, outcrop characterization, and other techniques. Once the reservoir- characterization study of both fields is completed, a pilot area of approximately 1 mi{sup 2} in one of the fields will be chosen for reservoir simulation. The objectives of the implementation phase of the project are to (1) apply the knowledge gained from reservoir characterization and simulation studies to increase recovery from the pilot area, (2) demonstrate that economically significant unrecovered oil remains in geologically resolvable untapped compartments, and (3) test the accuracy of reservoir characterization and flow simulation as predictive tools in resource preservation of mature fields. A geologically designed, enhanced-recovery program (CO{sub 2} flood, water flood, or polymer flood) and well-completion program will be developed, and one to three infill wells will be drilled and cored. Through technology transfer workshops and other present at ions, the knowledge gained in the comparative study of these two fields can then be applied to increase product ion from the more than 100 other Delaware Mountain Group reservoirs.
New and Improved Data Logging and Collection System for Atmospheric Radiation Measurement Climate Research Facility, Tropical Western Pacific, and North Slope of Alaska Sky Radiation, Ground Radiation, and MET Systems
Ritsche, M.T.; Holdridge, D.J.; Pearson, R.
Aging systems and technological advances mandated changes to the data collection systems at the Atmospheric Radiation Measurement (ARM) Program's Tropical Western Pacific (TWP) and North Slope of Alaska (NSA) ARM Climate Research Facility (ACRF) sites. Key reasons for the upgrade include the following: achieve consistency across all ACRF sites for easy data use and operational maintenance; minimize the need for a single mentor requiring specialized knowledge and training; provide local access to real-time data for operational support, intensive operational period (IOP) support, and public relations; eliminate problems with physical packaging (condensation, connectors, etc.); and increase flexibility in programming and control of the data logger.
Nocturnal Low-Level Jet in a Mountain Basin Complex. Part II: Transport and Diffusion of Tracer under Stable Conditions
Darby, Lisa S.; Allwine, K Jerry; Banta, Robert M.
Differences in nighttime transport and diffusion of sulfur hexafluoride (SF6) tracer in an urban complex-terrain setting (Salt Lake City, Utah) are investigated using surface and Dopplerlidar wind data, and large-scale surface pressure differences. Interacting scales of motion, as studied through the URBAN 2000 field program combined with the Vertical Transport and Mixing Experiment (VTMX), explained the differences in the tracer behavior during three separate Intensive Operating Periods (IOPs). With an emphasis on nighttime stable boundary layer conditions, these field programs were designed to study flow features responsible for the nighttime transport of airborne substances. This transport has implications for air quality, homeland security, and emergency response issues if the airborne substances are hazardous. The important flow features investigated included thermally forced canyon and slope flows and a low-level jet (LLJ) that dominated the basin-scale winds when the surface pressure gradient was weak. The presence of thermally forced flows contributed to the complexity and hindered the predictability of the tracer motion within and beyond the city. When organized thermally forced flows were present, the tracer tended to stay closer to the city for longer periods of time, even though a strong basin-scale LLJ did develop. When thermally forced flows were short-lived or absent, the basin-scale low-level jet dominated the wind field and enhanced the transport of tracer material out of the city.
Geomorphic surfaces in the northwestern Klamath Mountains, California and Oregon
Baldwin, K.S. (Forest Service, Happy Camp, CA (United States)); Ricks, C.L. (Forest Service, Gold Beach, OR (United States))
Thick, residual, colluvial and alluvial soils derived from ophiolitic rocks mantle at least four geomorphic surfaces in the Siskiyou and marble mountains, in northwestern California and Illinois Valley, in southwestern Oregon. Analysis of digital elevation data provides constraints on the distribution and origin of these surfaces. Because of the geomorphic expression and soil mechanical properties of the surfaces, a map of slope gradients less than 22 degrees closely approximates the distribution of geomorphic surfaces as they are known from field observations. Preliminary definition of individual surfaces is based upon classification of the slop-map by elevation ranges. The Klamath Peneplain'' of Diller (1902) and associated soils, recently referred to as Klamath Saprolite'', are recognized near summit elevation (1,500 meters) across the area. Regional uplift and erosion has resulted in extensive, large earthflow landslides derived from these soils. Alluvial and residual deposits on the floor of the Illinois Valley occur at the same elevation (300 meters) as incised alluvial and colluvial terrace deposits along the Klamath River and tributary streams. At least two additional surfaces have been identified in the Siskiyou and Marble Mountains at approximately elevation 750 and 1,000 meters. Analysis of digital elevation data, combined with the map of earthflow landslides, allows rapid preliminary mapping of geomorphic surfaces in this terrain.
The T-REX valley wind intercomparison project
Schmidli, J; Billings, B J; Burton, R; Chow, F K; De Wekker, S; Doyle, J D; Grubisic, V; Holt, T R; Jiang, Q; Lundquist, K A; Ross, A N; Sheridan, P; Vosper, S; Whiteman, C D; Wyszogrodzki, A A; Zaengl, G; Zhong, S
An accurate simulation of the evolution of the atmospheric boundary layer is very important, as the evolution of the boundary layer sets the stage for many weather phenomena, such as deep convection. Over mountain areas the evolution of the boundary layer is particularly complex, due to the nonlinear interaction between boundary layer turbulence and thermally-induced mesoscale wind systems, such as the slope and valley winds. As the horizontal resolution of operational forecasts progresses to finer and finer resolution, more and more of the thermally-induced mesoscale wind systems can be explicitly resolved, and it is very timely to document the current state-of-the-art of mesoscale models at simulating the coupled evolution of the mountain boundary layer and the valley wind system. In this paper we present an intercomparison of valley wind simulations for an idealized valley-plain configuration using eight state-of-the-art mesoscale models with a grid spacing of 1 km. Different sets of three-dimensional simulations are used to explore the effects of varying model dynamical cores and physical parameterizations. This intercomparison project was conducted as part of the Terrain-induced Rotor Experiment (T-REX; Grubisic et al., 2008).
Survey of Magnetic Fields Near BPA 230-kV and 500-kV Transmission Lines.
Perrin, Nancy; Aggarwal, Rajinder Pal; Bracken, T. Daniel
The purpose of this study was to characterize typical levels and variability of 60Hz magnetic fields at the centerline and edge of right-of-way of Bonneville Power Administration (BPA) 230-kV and 500-kV transmission lines. This was accomplished by taking magnetic field measurements at over 800 spans in Oregon and Washington. The spans were sampled using a stratified random sampling procedure with region (East vs. West), voltage (230-kV vs 500-kV), and circuit configuration as strata. There were five different circuit configuration groups for each region/voltage category requiring a total of 200 strata. Magnetic field measurements were taken at 13 locations under each span using an EMDEX-C as a survey meter. Additional information recorded for each span included conductor height (at 10 locations), right-of-way width, longitudinal and lateral slope, time of day, vegetation, terrain, weather conditions, temperature, wind speed, span length and presence of other lines in the corridor. 9 refs., 17 figs., 26 tabs.
Department of Mechanical and Nuclear Engineering Spring 2009 Dynamic Loading Analysis and Redesign for the
Demirel, Melik C.
effectively on smooth terrain, these machines lose their effectiveness when operating in environments and Redesign for the Hip Joint of the Bipedal Machine Overview Current construction machines available of the construction industry · Researched Biomechanics data to determine joint reaction forces in humans while walking
ORIGINAL PAPER Equation of state and pressure-induced structural changes
Vocadlo, Lidunka
), with dislocations in thrust terrains, as a component of cold desert salt deposits (Keys and Williams 1981 igneous rocks (Hardie 1991). Commercially, mirabilite has been acknowledged as a possible thermal storage a significant problem for the construction industry by virtue of its role in the weathering Electronic
Approved for Public Release; Distribution Unlimited 1 Virtual Robotics Challenge
2/6/2013 E. Krotkov Introduction Qual-3 SDF world files govern Downslope in radians, not #12 terrain and objects that constitute the environment) will be available as SDF world files as soon in the SDF world files and in this document, the dimensions in the SDF world files shall govern. Similarly
The two most common complaints the public has about animal feeding operations (AFOs) are
Mukhtar, Saqib
factors to con- sider are set-back distances, wind and topography. An AFO should have a set-back distance abruptly and frequently. Also, while rare, air carrying odors may drain from a hilltop to lower terrain angles when the wind is blowing and by the set-back distance. As Figure 1 shows, the potential for wind
www.wasp.dk Long-term (1-20 years) prediction of wind
;4 www.wasp.dk European Wind Atlas www.wasp.dk Geostrophic winds #12;5 www.wasp.dk Thermal winds www.wasp.dk Background · European Wind Atlas, Vol. II: Measurements and Modelling in Complex Terrain. Multi-partner EU). Exploring the limits of WAsP: the Wind Atlas Analysis and Application Program. Proc. 1996 European Union
Rappropriation des donnes et droit la rediffusion La rutilisation des donnes en dehors de la plateforme Facebook a t beaucoup discute selon l'angle de la
Paris-Sud XI, Universit� de
plateforme Facebook a �t� beaucoup discut�e selon l'angle de la vie priv�e et de la n�cessit� d donn�es des utilisateurs � des entreprises, la licence octroy�e � Facebook �tant transf�rable. A force d'abus r�p�t�s sur le terrain de la vie priv�e, le d�bat � propos de Facebook ignore largement la question de l
Photogrammetric Image Registration (PIR) of MTI Imagery P. Pope and J. Theiler*
Theiler, James
Photogrammetric Image Registration (PIR) of MTI Imagery P. Pope and J. Theiler* Space and Remote Imager (MTI) satellite. The photogrammetric image registration (PIR) method consists of two main parts. The PIR method uses mathematical models of the sensor, its trajectory, timing, and the terrain to mimic
This Summer 2011 Bulletin includes: 1) Summer 2011 Course Information
Dyer, Bill
will need clothing and footwear appropriate for mixed-weather and rugged terrain. Several classes will travel into high altitude back country areas where dressing in layers for changing weather conditions, sunscreen, sunglasses, insect repellant, rain/wind protective jacket, warm layer of clothing, and solid
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, TO APPEAR. 1 A Hybrid Conditional Random Field for
Murphy, Kevin Patrick
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, TO APPEAR. 1 A Hybrid Conditional Random Field of buildings, vegetations, cars, and natural terrain features over large regions. However, in many applications generative) probabilistic model, we call it a hybrid Conditional Random Field. We show that a MAP estimate
(1) Determine how topography is related to the spatial distribution
and cool dry summers. Dominant tree species include Douglas-fir (Pseudotsuga menziesii), western hemlock and 3). Terrain is rugged and steep, with a dense network of streams and a climate with warm wet winters-fire salvage b. Stand Basal Area vs Dead Wood Volume 0 20 40 60 80 100 120 0 200 400 600 800 1000 1200 Volume
Conepatus leuconotus (Carnivora: Mephitidae) JERRY W. DRAGOO AND STEVEN R. SHEFFIELD
Hayssen, Virginia
white stripe along the back, and is 1 of 4 species in the genus Conepatus. It has been reported as far reported in a variety of habitats from canyons, stream sides, rocky terrain, various grasslands, tropical, not Viverra Linnaeus, 1758. Mustela: Daudin in Lace�pe`de, 1802:163. Not Mustela Linnaeus, 1758. Gulo
Wind Energy-Related Atmospheric Boundary Layer Large-Eddy Simulation Using OpenFOAM: Preprint
Churchfield, M.J.; Vijayakumar, G.; Brasseur, J.G.; Moriarty, P.J.
This paper develops and evaluates the performance of a large-eddy simulation (LES) solver in computing the atmospheric boundary layer (ABL) over flat terrain under a variety of stability conditions, ranging from shear driven (neutral stratification) to moderately convective (unstable stratification).
Session: Wind resources and site characterisation 1 (BT1.3) Track: Technical
. The validation is based on meteorological and wind farm production data from about 10 wind farms, situated) application of the results for improved wind farm power production predictions as well as wind resource on meteorological and wind turbine data from about 10 wind farms in complex terrain. The wind farm sites are located
Hierarchical occlusion culling for arbitrarily-meshed height fields�
Edmondson, Paul Michael
Many graphics applications today have need for high-speed 3-D visualization of height fields. Most of these applications deal with the display of digital terrain models characterized by a simple, but vast, non-overlapping mesh of triangles. A great...
I/O-Efficient Algorithms for Contour Line Extraction and Planar Graph Blocking
Agarwal, Pankaj K.; Arge, Lars; Murali, T. M.; Kasturi R., Varadarajan; Vitter, Jeffrey Scott
For a polyhedral terrain C, the contour at z-coordinate h, denoted Ch, is defined to be the intersection of the plane z = h with C. In this paper, we study the contour-line extraction problem, where we want to preprocess ...
PRINT ONLY: MOON Goswami J. N. Thyagarajan K. Annadurai M.
Rathbun, Julie A.
to identify abundances of various lunar minerals, (iii) High resolution 3D mapping of the lunar surfacePRINT ONLY: MOON Goswami J. N. Thyagarajan K. Annadurai M. Chandrayaan-1: Indian Mission to Moon this scientific objective, include a Terrain Mapping Camera (TMC), a Hyper-Spectral Imager (HySI), a Low Energy X
Mountain Precipitation and Hydrology in the Middle East Ronald. B. Smith*, Jason Evans*, Robert Oglesby**
Evans, Jason
Mountain Precipitation and Hydrology in the Middle East Ronald. B. Smith*, Jason Evans*, Robert shadow effect. Recent studies have tried to quantify this effect on Alpine terrain [Smith et al. 2003a model of this is the response to heating in a steady stratified stream [Smith and Lin, 1982
Simultaneous Optimal Parameter and Mode Transition Time Estimation Lauren M. Miller and Todd D. Murphey1
Hartmann, Mitra J. Z.
vehicles (SSVs) present a challenge from modeling, trajectory-tracking, and control design perspec- tives generally necessitates either robust control techniques or accurate models of the vehicle dynamics values from coarsely sampled data for a skid-steered vehicle, which traverses unknown or changing terrain
Mobility platform coupling device and method for coupling mobility platforms
Shirey, David L. (Albuquerque, NM); Hayward, David R. (Albuquerque, NM); Buttz, James H. (Albuquerque, NM)
A coupling device for connecting a first mobility platform to a second mobility platform in tandem. An example mobility platform is a robot. The coupling device has a loose link mode for normal steering conditions and a locking position, tight link mode for navigation across difficult terrain and across obstacles, for traversing chasms, and for navigating with a reduced footprint in tight steering conditions.
The Poles of Mars: A Key to Understanding Earth's
Faraon, Andrei
snow cover on Earth, lies a permanent, residual polar cap #12;Ice Age made mainly of water ice. The residual cap at the south pole is smaller tban that of the north pole, and its carbon dioxide seasonal the residual caps, we see smooth, finely layered terrains with scarps that exhibit dark and light banded
Lunar Laser Altimetry Studying the Topography
Christian, Eric
exploration on the Moon's surface we need to map the topography of the surface to ensure its safe on the surface). Currently, one of the best methods for determining topography is to use laser altimetry. While be important to know the topography or physical terrain of the surface of the Moon? This is a good time
Urban Ecosystem Design Bedrich Benes
Aliaga, Daniel G.
Urban Ecosystem Design Bedrich Benes Michel Abdul Massih Philip Jarvis Purdue University Daniel G. Aliaga Carlos A. Vanegas a) b) c) Figure 1: This example demonstrates the need for urban ecosystems. The image in a) shows a terrain occupied by a wild ecosystem and b) displays the same ecosystem grown over
JUNE 2000 327J A M E S E T A L . 2000 American Meteorological Society
Yuter, Sandra
and Visualization over Complex Terrain* CURTIS N. JAMES, STACY R. BRODZIK, HARRY EDMON, ROBERT A. HOUZE JR: the data stream from an operational radar, 3D topographical information, and the NCAR Zebra data visualization and integration software. MountainZebra operates routinely on a 3D data stream from the National
WEED INFESTATIONS ARE GENERALLY MORE frequent along roadsides and other disturbed areas than
Maxwell, Bruce D.
in adjacent land, possibly because vehicles spread seeds into these areas and such areas provide suitable habitats for weed growth. Many types of vehicles, including passenger cars, 4-wheel drive (4WD) trucks, agricultural implements, tracked vehicles and all- terrain vehicles (ATVs) have been found to pick up seeds
Assessing the impacts of military vehicle traffic on natural areas. Introduction to the special
Fehmi, Jeffrey S.
Assessing the impacts of military vehicle traffic on natural areas. Introduction to the special issue and review of the relevant military vehicle impact literature Alan B. Anderson a,*, Antonio J, and the International Society for Terrain-Vehicle Systems cosponsored a symposium titled ``Assessing the Impacts
Geographia Technica, Special Issue, 2010, pp. 90 to 95 AUTOMATED SMALL-SCALE RELIEF SHADING: A NEW METHOD
Jenny, Bernhard
for the generalization of digital elevation models specifically designed to process digital elevation data visible at small scales. Small- scale shaded relief derived automatically from high-resolution digital are applied to digital terrain data, important ridges and valley edges are blurred, and their characteristic
Prediction of kriging errors 601 Copyright 2005 John Wiley & Sons, Ltd. Earth Surf. Process. Landforms 30, 601612 (2005)
Hung, I-Kuai
Prediction of kriging errors 601 Copyright © 2005 John Wiley & Sons, Ltd. Earth Surf. Process. Landforms 30, 601612 (2005) Earth Surface Processes and Landforms Earth Surf. Process. Landforms 30, 601). The construction of continuous surfaces including the digital elevation and terrain models (DEM, DTM) can
Route profile analysis system and method
Mullenhoff, D.J.; Wilson, S.W.
A system for recording terrain profile information is disclosed. The system accurately senses incremental distances traveled by a vehicle along with vehicle inclination, recording both with elapsed time. The incremental distances can subsequently be differentiated with respect to time to obtain acceleration. The computer acceleration can then be used to correct the sensed inclination.
REFERENCE: Introduction to Remote Sensing. James B.
Gilbes, Fernando
-viewing Wide Field-of-view Sensor (SeaWiFS) Advance Very High Resolution Radiometer (AVHRR) Synthetic Temperature #12;ACTIVE REMOTE SENSING The sensor illuminates the terrain with its own energy, then records the reflected energy as it has been altered by the earth's surface. #12;SIDE-LOOKING AIRBORNE RADAR SLAR #12
A Three-Dimensional Geographic and Storm Surge Data Integration System for Evacuation Planning
Chen, Shu-Ching
@fiu.edu Abstract The rise of offshore water caused by the high winds of a low pressure weather system, or storm to construct a three-dimensional ocean po- sitioned over the terrain models. Ambient details such as wind, vegetation, ocean waves, and traffic are animated based on up-to-date wind and storm surge data. Videos
A Unified Algorithm for Adaptive Spacetime Meshing
Thite, Shripad
: Wave equation describing displacement u(x, t) about the mean. utt - 2 uxx = 0 (i) wavespeed can terrain whose spatial projection is a triangulation Advance in time local neighborhood of front of dependence of Q. Approximate domains of dependence and influence by a circular symmetric double cone. Shripad
for comparing multiple technologies and policies to one another), focusing exclusively on customer-sited solar customers to others constitute undue price discrimination against solar PV. Perhaps most damaging for solar TO DEEPER SOLAR PV COST REDUCTIONS The Current Terrain In recent years, electric utilities have experienced
Integrating the Army Geospatial Enterprise: Synchronizing Geospatial-Intelligence to the Dismounted James E. Richards
de Weck, Olivier L.
1 Integrating the Army Geospatial Enterprise: Synchronizing Geospatial. #12;2 [This Page Intentionally Left Blank] #12;3 Army`s Geospatial Architecture: delivering Geospatial-Intelligence of complex and urban terrain to the dismounted Soldier by James E. Richards ABSTRACT The Army`s Geospatial
Center for Quantum Science and Engineering Weekly Seminar
Wu, Yih-Min
to a hydrostatic pressure distribution. With the help of a terrain-fitted coordinate system and formulating, the model equations are of hyperbolic type which supports discontinuous weak solutions, ie. the hydraulic (a) Shiaolin landslide at t = 60 sec, (b) Overview of Shialin Village prior to the landslide
Investigation of Automated Feature Extraction Using Multiple Data Sources
Theiler, James
and variety of platforms are now capable of collecting remote sensing data over a par- ticular scene. For many of data fusion is a hot-bed of activity. It is the aim of data fusion to integrate the data available from to assign a label to each pixel in an image, where the set of labels from which to choose is fixed. Terrain
METEOROLOGYMETEOROLOGYMETEOROLOGYMETEOROLOGY 280280280280 Intro to Mountain MeteorologyIntro to Mountain MeteorologyIntro to Mountain MeteorologyIntro to Mountain Meteorology
Clements, Craig
and mesoscale wind and precipitation processes in mountainous terrain. 3. the surface energy budgets that lead and behavior evaluate mountain weather impacts on snow pack behavior Required Texts/Readings Mountain review and a term paper. Assignments will include both in-class and take home components and will include
Guidelines on Safety in Field Research Responsible Unit: Office of Environmental Health and Safety
Sokolowski, Marla
or remote or politically unstable locations; extreme weather conditions; hazardous terrain; harmful wildlife and team leaders who are involved in directly supervising research on location. Due diligence must, the categories of risk that may be associated with each location and kind of field research and in determining
Oregon State University Tuesdays, 4:00 p.m.
Wright, Dawn Jeannine
uses 3-D mapping, virtual reality, and terrain fly-through techniques to create vivid interpretations Oregon State University 3-D Scientific Visualization, High Performance Computer Graphics Feb 6 Mark of Earth Structure Mar 13 Bob Crippen NASA Jet Propulsion Lab Pasadena, CA NASA Shuttle Radar Topography
Center for Environmental Management of Military Lands (970) 491-2748 firstname.lastname@example.com
operations, cross-country movement, wetlands, vegetation communities, terrain analysis, endangered species products are deliverable in hard and soft copy. GIS modeling and map products using Remotely Sensed Data, and remote sensing applications. Center staff can provide technical support remotely or on-site, to ensure
Manipulating the Future: Predictor Based Feedback for Velocity Control in Virtual Environment Navigation
New Hampshire, University of
Manipulating the Future: Predictor Based Feedback for Velocity Control in Virtual Environment control. The predictor indicates to the user where and how fast he or sheis travelling and hasadirect manipulation feel to it. Experiences using the predictor to navigate over digital terrain maps are discussed
Hansen, Vicki
ICARUS 132, 321343 (1998) ARTICLE NO. IS985897 Ribbon Terrain Formation, Southwestern Fortuna at southwestern Fortuna Tessera; we extend our favors an upwelling model for highland plateau formation Fortuna Tessera) trough walls are parallel and matched and would exhibit a close fit if the trough
Journal of Geological Society of Sri Lanka Vol. 15 (2013), 69-83 GEOTHERMAL ENERGY POTENTIAL IN SRI LANKA: A PRELIMINARY
Jones, Alan G.
Journal of Geological Society of Sri Lanka Vol. 15 (2013), 69-83 69 GEOTHERMAL ENERGY POTENTIAL faults or hot dry rock that would help geothermal energy development. Data show three regions, metamorphic terrains INTRODUCTION Geothermal energy development in Sri Lanka has been considered
CVGIP: IMAGE UNDERSTANDING Vol. 59, No. 2. March, pp. 171-182, 1994
Kim, Yong Jung
Features from Elevation Maps IN So KWEON Department of Automation and Design Engineering, KAIST, Seoul. 130 astheautonomousnavigationinnatural terrain and the automation of map making process require high- level scene descriptions as well been studied in two research areas: in robotics, autonomous underwater vehicle (AUV) route planning
Visualization of Membrane Fusion, One Particle at a Time Jason Otterstrom,
to a number of model systems have resulted in a new experimental paradigm and open up considerable membranes from two initially separate bilayers is an energetically favorable one, there are many energetic. Significant energetic barriers separating these intermediates make the energetic landscape a rough terrain
Adaptive Selective Learning for Automatic Identification of Sub-Kilometer Craters
Ding, Wei
Martian terrain characterized by heterogeneous surface morphology. The experimental results demonstrate and present geological processes and provide the only tool for measuring rela- tive ages of observed geologic. Geologic stratigraphy based on manually collected databases has coarse spatial resolutions. Finer spatial
Bernoulli Trials Based Feature Selection for Crater Detection
Ding, Wei
image exhibiting a heav- ily cratered Martian terrain characterized by heterogeneous surface morphology information about the past and present geological pro- cesses and provide the only tool for measuring relative ages of observed geologic formations [7]. It becomes extremely challenging to automatically count
Wireless Networks in Rural Areas: Challenges and Solutions
Dyer, Bill
Wireless Networks in Rural Areas: Challenges and Solutions Shen Wan April 25, 2009 Abstract In this thesis proposal, we discuss the current limitations and chal- lenges in wireless networks, especially in rural, remote or areas with rough terrains. Although traditional wireless networking technologies have
Fat Cowboy Horror Story The Kuskokwim River vaults down the flanks of the Alaska Range, and its vivid turquoise
Albert, John
fire. Oil lamps hung from the rafters of the tiny shack as the flames roared in a crude hearth over impassable terrain to Anchorage. Wind-driven snow lay deep over the land. The mercury was far fatigued, yet none slept. They sat in a ring in their crude chairs around the hearth, discussing events
Visual Control of an Autonomous Indoor Robotic Blimp
Fisher, Bob
in this chapter. Autonomous aerial vehicles have been an attractive platform for a wide range of applications, especially since they don't have the terrain limitations the autonomous ground vehicles face. They have been kind of autonomous aerial vehicles; they are wingless and have the ability to hover. This makes them
Curriculum Policy of the Graduate School of Agricultural Science, Graduate Program Agricultural Science plans to conserve natural and artificial ecosystems and its ideal of
Banbara, Mutsunori
) Environmental Informatics Terrain-Vehicle Systems Process Control Systems for Agri-food Materials Biomeasurement and Technology I-3 Advanced Science and Technology I-4 Advanced Science and Technology I-5 Food, Environmental and Healthy Life (Section of Food) Food, Environmental and Healthy Life (Section of Environment) Food
ASES Proc. Solar 2010, Phoenix, AZ HIGH PERFORMANCE MSG SATELLITE MODEL FOR OPERATIONAL
Perez, Richard R.
ENERGY APPLICATIONS Tom�s Cebecauer GeoModel, s.r.o. Pionierska 15 841 07 Bratislava, Slovakia tomas terrain affects exploitation of solar energy. In this article we present innovative features of MSG� ASES � Proc. Solar 2010, Phoenix, AZ HIGH PERFORMANCE MSG SATELLITE MODEL FOR OPERATIONAL SOLAR
Modular Topology Control and Energy Model for Wireless Ad Hoc Sensor Networks
Jay Yang, Shanchieh
Modular Topology Control and Energy Model for Wireless Ad Hoc Sensor Networks Niranjan in a harsh terrain typically are battery operated and, therefore, require energy efficient network protocols. In order to ease the analysis of the energy usage of proposed network protocols, this paper proposes
SEEP2010 Conference Proceedings, June 29th , Bari, ITALY
Poggi, Davide
System (GIS), Digital Terrain Models (DTM) and an existing database of the drinking water service focus on electricity generation by micro-hydro plants integrated in water supply systems, which convert the potential energy of water flowing in pipes into electric power at the lower end of the pipes. While other
Highway Geology Symposium Santa Fe, 2008 HGS Session 5 -Paper 5.2 Page 1 of 21
Haneberg, William C.
59th Highway Geology Symposium Santa Fe, 2008 HGS Session 5 - Paper 5.2 Page 1 of 21 59 TH HIGHWAY GEOLOGY SYMPOSIUM 2008 Santa Fe, New Mexico SESSION 5 PAPER #5.2 REVISITING AN OLD PROJECT WITH NEW TECHNOLOGY-- DIGITAL TERRAIN MODELING AND MULTI-LAYERED VIRTUAL GEOLOGIC HAZARD MAPPING ALONG A PROPOSED
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research
Lachniet, Matthew S.
, particulate organic carbon (POC), air-bubble CO2, and dissolved organic carbon (DOC). Our new CO2 and DOC ages paleoclimate and carbon recycling in ancient permafrost terrain Matthew S. Lachniet a, , Daniel E. Lawson b of the persistence of old carbon in younger deposits. To investigate carbon dynamics and establish ice wedge
Bringing traditional panorama projections from the painter's canvas to the digital realm
Jenny, Bernhard
projections that are generally not implemented in 3D-renderers, but are used for manual production of three for the background; the fisheye projection that portrays the terrain in an eye-catching manner; the "rubber for traditional analog production techniques as for modern computer-based rendering engines. From a geometrical
Nonlinear Processes in Geophysics (2001) 8: 429438 Nonlinear Processes
Boyer, Edmond
Geophysical Society 2001 Mesoscale predictability under various synoptic regimes W. A. Nuss and D. K. Miller slightly ro- tated terrain are compared to gauge the sentivity of mesoscale forecasts to small forecast errors on the mesoscale in both wind and precipitation. The largest mesoscale errors occur when
Tropical Cyclone Report Hurricane Irene
and did not affect the island. The hurricane moved very close to the north coast of Hispaniola on 23's circulation with the high terrain of Hispaniola likely delayed additional intensification. As it moved away from Hispaniola early on 24 August, however, Irene began to strengthen. It became a category 3
Free and forced motion in an asymmetric liquid-column oscillator
Davidson, Fordyce A.
terrain produces drag and creates a boundary-layer effect, making the tallest buildings particularly is analogous to that of the tuned liquid-column damper used to suppress oscillatory motion in large semi are designed to counteract the oscillatory motion of the building with their own momentum. The first auxiliary
6.9 A NEW APPROACH TO FIRE WEATHER FORECASTING AT THE TULSA WFO Sarah J. Taylor* and Eric D. Howieson NOAA/National Weather Service Tulsa, Oklahoma 1. INTRODUCTION The modernization of the National then providesthemeteorologistanopportunitytoadjustmodel forecasts for local biases and terrain effects. The Tulsa, Oklahoma WFO has been a test office
Guides in Cotton Irrigation on the High Plains.
Swanson, N. P.; Thaxton, E. L. Jr.
United States cotton crop and one-third the total Texas crop. The terrain is level and, 1 tiltrefore, is suited to large-scale, high-speed, aecl~anized operation. The soils have a high de- tree of inherent fertility and produce good yields r cotton...
Towards Realization of Adaptive Running of a Quadruped Robot Using Delayed Feedback Control
Kimura, Hiroshi
the following results: 1) When a robot runs on flat terrain without disturbance causing energy loss, the selfTowards Realization of Adaptive Running of a Quadruped Robot Using Delayed Feedback Control Zu and efficient running on flat and rough ter- rain. The Rush robot is a compact, kneed, four legged machine
Ickert-Bond, Steffi
Point Beluga Field Ice Rink Townshend Point TROTH YEDDHA' PARK HULBERT NANOOK TERRAIN PARK Facilities Nerland McIntosh Stevens Ice Arena Lola Tilly Wickersham Police Fire Dept Police Fire Dept MacLean House Nerland McIntosh Stevens Ice Arena Lola Tilly Student Recreation Center Wickersham Police Fire Dept Police
Optic Flow Sensor Objective: Using optic flow sensors, detect and track
Wirthlin, Michael J.
Optic Flow Sensor Objective: Using optic flow sensors, detect and track the walls of a rural or urban terrain. Principle Investigators: Tim McLain, Randy Beard Optic Flow Sensor � Computationally factor � 1" x 1" x 1.5" � Inexpensive � $80 including optics � Fast � computes optic flow at 2300 fps2006
Technical Report Documentation Page 1. Report No.
Texas at Austin, University of
from the door zone, and operationally, a bicycle lane is more effective than a wide outside lane characteristics, and (6) roadway operational characteristics. The data used in the analysis is drawn from a web; and roadway terrain. 17. Key Words Bicycle Facility Design, Bicycle route choice analysis, Stated preference
Range imaging: a new method for high-resolution topographic measurements in small-and medium-
Kirchner, James W.
Range imaging: a new method for high-resolution topographic measurements in small- and medium is a useful complement or alternative to existing methods for high-resolution measurements in small- to medium has led to a dramatic increase in terrain information and opened up new opportunities for hydro- logic
Chapter One General Introduction and
Xue, Ming
system, i.e. the quasi�nonhydrostatic system in pressure�based sigma� coordinates (Miller and White, 1984; � 2 � s�coordinates by Miller and White (1984) so that irregular bottom terrain can be treated are described first. The current model includes three water phases, namely, water vapour, cloud water and rain
Gilbes, Fernando
DEVELOPMENT OF REAL TIME FLOOD PREDICTION CAPABILITIES IN PUERTO RICO TO EVALUATE UNCERTAINTIES of Electrical and Computer Engineering 1,2,3 University of Puerto Rico at Mayag�ez Abstract Due to the complex terrain and the tropical influence, Puerto Rico is characterized by small watersheds, high rainfall
From R. Zoebel and D. Moeller, eds., 1998, Proceedings of the 12th European Simulation Multiconference, University of Manchester, p.437-442 A SIMULATION TESTBED FOR BIOLOGICALLY INSPIRED
Delcomyn, Fred
transmission properties such as delay, sampling rate, and noise. INTRODUCTION A key issue in the field robots can handle obstacles, but cannot easily move quickly over rough terrain or right themselves a way around these impediments. In the remainder of this paper, we describe a dynamics simulator
Vronique Ginouvs, Responsable des archives sonores de la MMSH,
Paris-Sud XI, Universit� de
://phonotheque.hypotheses.org Marceau Gast (1927-2010), un ethnologue passeur de ses sources de terrain Intervention pr�sent�e lors des journ�es d'hommage � Marceau Gast, Un ethnologue entre Sahara, Kabylie, Y�men et Queyras : Itin�raire 2004 puis en 2005, Marceau Gast, ethnologue, a d�pos� � la phonoth�que de la MMSH (Maison
Decision Making of Mobile Robot in the Presence of Risk on Its Surroundings
Huh, Sung
Mobile robots are used on many areas and its demand on extreme terrain, hazardous area, or life-threatening place is increasing to reduce the loss of life. A good decision making capability is essential for successful navigation of autonomous robot...
Letting Go: True autonomy in an AUV
Griffiths, Gwyn
Will be needed if we are to explore the ocean beneath Europa�s ice-covered surface. #12;Satellite images,000 feet Which is which? #12;Face of the Ronne Ice Shelf, Antarctica `To penetrate this barrier) Distancefromseasurface(m) Start Point Surfacing for GPS position fixing Terrain Following #12;Studies in Upper Ocean
Ordering points for incremental TIN construction from James J. Little and Ping Shi
Little, Jim
Ordering points for incremental TIN construction from DEMs James J. Little and Ping Shi Department approximations to terrain surfaces (TINs) from dense digital elevation models(DEMs) adds points to an initial in the current TIN, the worst fitting point, in terms of vertical distance, is selected. The order of insertion
Mars Robotic Outpost Papers "We can all go to Mars-the Mars Outpost Proposal" Louis Friedman and Bruce Murray, the
Dennis, Robert G.
and handling -ISRU plant deployment -internal habitat servicing "Automation and Robotics for Human Mars sampling from aerial vehicles -in situ propellants and vehicles that use them -subsurface and submersible vehicle concepts -high speed, rough terrain, sensing and processing for autonomous navigation and data
Convective Snowbands Downstream of the Rocky Mountains in an Environment with Conditional, Dry Symmetric, and Inertial Instabilities
Schumacher, Russ
Convective Snowbands Downstream of the Rocky Mountains in an Environment with Conditional, Dry quickly equatorward. The bands occurred downstream of complex terrain on the anticyclonic-shear side banners downstream of mountains, and in association with frontogenetical ascent along two baroclinic zones
Gupta, Abhinav
, these field tests are helping to demon- strate and influence the use of autonomous vehicles in the future. UPI autonomous ground vehicle platforms available today. Ft. Carson, CO, August 2006Ft. Carson, CO, August 2006 unmanned vehicle, "SPINNER," that couples extreme terrainability with fuel efficiency, survivability
Design Project -SIE 2010 Inventaire des missions
miscanthus Mise en place d'un outil d'aide � la d�cision pour la gestion des sites contamin�s: le cas de la gestion des parcelles de terrain contamin�es autour de l'ancienne usine de Metaleurop Nord en se: NOx, particules fines, Zn, Al, CO2, NH3 et Atrazine (pesticides) Mesures au niveau r�gional Gestion
Ire rationnelle ? | 1 Ire rationnelle ?
Paris-Sud XI, Universit� de
quels chemins l'Allemagne, sur le terrain de la philosophie, en est arriv�e � Hitler � et de � d�masquer � entreprise � dont Hitler fut le h�raut et l'Allemagne, plus que tout autre pays europ�en, le th��tre appara�t faschistiche Philosophie in Deustchland entstanden ? r�dig� peu de temps apr�s la prise du pouvoir par Hitler
Dr. Lewis Ntaimo Industrial and Systems Engineering
Ding, Yu
for renewable energy, including wind energy, is cost and marketability and that wind energy is perhaps the most of the cost of wind energy generation, depending on wind farm size, terrain and other factors. "You can in the market. However, to sustain wind energy generation and increase its market share, industry needs
Yann-Hang Lee and Daeyoung Kim Real Time Systems Research Laboratory
Younis, Mohamed
of Florida {yhlee, email@example.com Mohamed Younis, Jeff Zhou, James McElroy Honeywell International Inc. {mohamed.younis, jeff.zhou, james.mcelroy} @honeywell.com Abstract In the recent development of avionics, the Honeywell's Enhanced Ground Proximity Warning System (EGPWS) consists of tasks for map loading, terrain
References R-3 Note: In this report we refer to a number of documents (e.g., plans, reports) that are intended for
Pennycook, Steve
. A Glossary of Terms in Nuclear Science and Technology, American Nuclear Society, La Grange Park, Illinois. ANSI. 1969. Guide to Sampling Airborne Radioactive Materials in Nuclear Facilities, ANSI N13.1-1969R, K. R. 2003. Vertical Transport and Mixing During Winter over a Ridge-and-Valley Terrain. (Not yet