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[Keywords = computer simulation]
Chemical and Process Engineering (5)
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Gallo, Waldyr L.R. (1)
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Hadjidj, Mohammed Salim (1)
Han, Peijie (1)
Jin, Tao (1)
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Kryzia, Dominik (1)
Kwiatoń, P. (1)
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Lu, Zhumao (1)
Ma, Ruixian (1)
Mattos, Ana P. (1)
Meng, Xiaokai (1)
Moreau, Danielle J. (1)
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Rufino, Caio H. (1)
Shi, Hao (1)
Skrzypczak, T. (1)
Song, Lei (1)
Sowa, L. (1)
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Urbaniak, Agata (1)
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Wu, Yu (1)
Xia, Zhiguo (1)
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Zhang, Houquan (1)
de Lima, Alessandro J.T.B. (1)
computer simulation (1)
optimization (1)
railway polynomial transition curves (1)
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Engine simulations (1)
Ethanol (1)
FEM simulations (1)
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Hybrid photovoltaic-wind-storage system (1)
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airlift biorector (1)
biogas (1)
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computer simulations (1)
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double-substrate kinetics (1)
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households (1)
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mathematical modelling (1)
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polymer membranes (1)
roadheader (1)
rock mass with layered structure (1)
simulation (1)
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Optymalizacja wielomianowych krzywych przejściowych z punktu widzenia wielkości zrywu. = Optimization of polynomial transition curves from the viewpoint of jerk value
K. Zboiński
P. Woznica
Archives of Civil Engineering | 2017 | No 1
| 181-199
kolejowe wielomianowe krzywe przejściowe
symulacja komputerowa
railway polynomial transition curves
computer simulation
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The aim of the presented paper is to show the results of shape optimization of railway polynomial transition curves (TCs) of 5th, 7th, and 9th degrees through the use of the full vehicle model and new criteria of assessement concerning the jerk value. The search for the proper shape of TCs means that in this work, the evaluation of TC properties is based on select quantities and the generation of such a shape through the use of mathematically understood optimization methods. The studies presented have got a character of the numerical tests. For this work, advanced vehicle models describing dynamical track-vehicle and vehicle-passenger interactions as well as optimization methods were exploited. In the software vehicle model of a 2-axle freight car, the track discrete model, non-linear descriptions of wheel-rail contact are applied. This part of the software, the vehicle simulation software, is combined with a library optimization procedure into the final computer program.
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On adaptive modelling and filtering in computer simulation and experimental mechanics
S.A. Łukasiewicz
M.H. Hojjati
R. Qian
Bulletin of the Polish Academy of Sciences: Technical Sciences | 2007 | vol. 55 | No 1
| 99-106
adaptive modelling
computer simulation
experimental mechanics
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The paper presents the application of the newly developed method of the solution of nonlinear equations to the adaptive modelling and computer simulation. The approach is suitable when the system of equations can be arranged in such a way that it consists of a large number of linear equations and a smaller number of nonlinear equations. This situation occurs in the case of adaptive modelling of mechanical systems using finite elements or finite differences techniques. In this case the classical least square method becomes very effective. The paper presents several examples of the application of the method. A solution to the, so called, "black box" problem is also presented.
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Starch gelatinisation in Couette-Taylor flow apparatus
Robert Hubacz
Monika Buczyńska
Chemical and Process Engineering | 2011 | No 4 December
starch gelatinisation
Couette-Taylor flow
computer simulation
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In this paper starch gelatinisation in Couette-Taylor flow (CTF) apparatus (equipped with a water heat jacket) has been investigated. CTF (characterised by the presence of Taylor vortices) provides good environment for gelatinisation, e.g. effective mixing, fast heat transfer, positive influence on starch rheological properties. During experiments starch gelatinisation degree and starch swelling has been studied. It was accompanied by temperature measurements performed along the apparatus. Additionally, starch gelatinisation was investigated by computer simulation. A complete starch gelatinisation was obtained for the shortest investigated residence time in the apparatus when the temperature in the heat jacket was above 85 °C. Nevertheless, it seems that it is still possible to reduce a residence time value, as well as, the value of Thj, but it may require some acceleration of rotor rotation. The swelling degree of gelatinised starch increased with growing values of residence time, rotor rotation and process temperature. Heat transferred could be affected by the structure of the Taylor vortex flow. No significant destruction of starch granules was observed during the treatment in Couette-Taylor flow apparatus. A quite satisfactory agreement between computer simulation and experiments results was achieved.
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Modelling Grain Growth Kinetics in Steels
G. Napoli
A. Di Schino
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 2
grain growth
computer simulation
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Steel is a versatile material that has found widespread use because of its mechanical properties, its relatively low cost, and the ease with which it can be used in manufacturing process such as forming, welding and machining. Regarding to mechanical properties are strongly affected by grain size and chemical composition variations. Many industrial developments have been carried out both from the point of view of composition variation and grain size in order to exploit the effect of these variables to improve the mechanical proprieties of steels. It is also evident that grain growth are relevant to the mechanical properties of steels, thus suggesting the necessity of mathematical models able to predict the microstructural evolution after thermo cycles. It is therefore of primary importance to study microstructural changes, such as grain size variations of steels during isothermal treatments through the application of a mathematical model, able in general to describe the grain growth in metals. This paper deals with the grain growth modelling of steels based on the statistical theory of grain growth originally developed by Lücke [1] and here integrated to take into account the Zener drag effect and is therefore focused on the process description for the determination of the kinetics of grain growth curves temperature dependence.
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Numerical tests of the virtual human model response under dynamic load conditions defined in Federal Aviation Regulation Part 23.562 and 25.562 – preliminary study
Lukasz Lindstedt
Jan Vychytil
Tomasz Dziewonski
Ludek Hyncik
Archive of Mechanical Engineering | 2016 | vol. 63 | No 4
seat certification
human model
computer simulation
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The main aim of the presented research was to check mechanical response of human body model under loads that can occur during airplane accidents and compare results of analysis with some results of experimental tests described in literature. In simulations, new multi-purpose human body model, the VIRTHUMAN, was used. The whole model, as well as its particular segments, was earlier validated based on experimental data, which proved its accuracy to simulate human body dynamic response under condition typical for car crashes, but it was not validated for loads with predominant vertical component (loads acting along spinal column), typical for airplane crashes. Due to limitation of available experimental data, the authors focused on conducting calculations for the case introduced in 14 CFR: Parts 23.562 and 25.562, paragraph (b)(1), knowing as the 60 pitch test. The analysis consists in comparison of compression load measured in lumbar section of spine of the FAA HIII Dummy (experimental model) and in the Virthuman (numerical model). The performed analyses show numerical stability of the model and satisfactory agreement between experimental data and simulated Virthuman responses. In that sense, the Virthuman model, although originally developed for automotive analyses, shows also great potential to become valuable tool for applications in aviation crashworthiness and safety analyses, as well.
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Start-Up, Modelling and Simulation of the Anammox Process in a Membrane Bioreactor
Grzegorz Cema
Adam Sochacki
Jakub Kubiatowicz
Piotr Gutwiński
Joanna Surmacz-Górska
Chemical and Process Engineering | 2012 | No 4 December
activate sludge model
computer simulation
nitrogen removal
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There are certain well-known methods of diminishing concentrations of nitrogen compounds, but they are ineffective in case of nitrogen-rich wastewater with a low content of biodegradable carbon. Partial nitritation followed by anaerobic ammonium oxidation (Anammox) process appear to be an excellent alternative for traditional nitrification and denitrification. This paper presents the feasibility of successful start-up of Anammox process in a laboratory-scale membrane bioreactor (MBR). It was shown that the combination of membrane technology and Anammox process allowed to create a new highly efficient and compact system for nitrogen removal. It was possible to achieve average nitrogen removal efficiency equal to 76.7 ± 8.3%. It was shown that the start-up period of 6 months was needed to obtain high nitrogen removal efficiency. The applied biochemical model of the Anammox process was based on the state-of-the-art Activated Sludge Model No.1 (ASM 1) which was modified for accounting activity of autotrophs (nitrite-oxidising bacteria and nitrateoxidising bacteria) and anammox bacteria. In order to increase the predictive power of the simulation selected parameters of the model were adjusted during model calibration. Readjustment of the model parameters based on the critically evaluated data of the reactor resulted in a satisfactory match between the model predictions and the actual observations.
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The Fluidity of Al-Si Alloy: Computer Simulation of the Influence of Temperature, Composition, and Pouring Speed
P. Futáš
J. Petrík
A. Pribulová
P. Blaško
P. Palfy
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 4
computer simulation
regression analysis
Monte Carlo method
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The purpose of this study is to identify relationships between the values of the fluidity obtained by computer simulation and by an experimental test in the horizontal three-channel mould designed in accordance with the Measurement Systems Analysis. Al-Si alloy was a model material. The factors affecting the fluidity varied in following ranges: Si content 5 wt.% – 12 wt.%, Fe content 0.15 wt.% – 0.3wt. %, the pouring temperature 605°C-830°C, and the pouring speed 100 g · s–1 – 400 g · s–1. The software NovaFlow&Solid was used for simulations. The statistically significant difference between the value of fluidity calculated by the equation and obtained by experiment was not found. This design simplifies the calculation of the capability of the measurement process of the fluidity with full replacement of experiments by calculation, using regression equation.
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Simulation of Stress Distribution in a Thick- Walled Bushing Produced by Die-Casting
T. Pacyniak
B.P. Pisarek
D. Kołakowski
Archives of Foundry Engineering | 2017 | vol. 17 | No 4
Mechanical properties
computer simulation
residual stresses
Complex aluminium bronze
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Metallographic investigations and a computer simulation of stresses in a gravity die-casting bushing were performed. Simulation of the casting process, solidification of the thick-walled bushing and calculations of the stress was performed using MAGMA5.3 software. The size variability of phases κIIaffecting the formation of phase stresses σf, depending on the location of the metallographic test area, was identified. The distribution of thermal σtand shrinkage stresses σs, depending on the location of the control point SC in the bushing's volume, was estimated. Probably the nature of these stresses will change slightly even after machining. This can cause variations in operating characteristics (friction coefficient, wear). Due to the strong inhomogeneity of the stress distribution in the bushing's casting, it is necessary to perform further tests of the possibility to conduct thermal treatment guaranteeing homogenization of the internal stresses in the casting, as well as to introduce changes in the bushing's construction and the casting technology. The paper presents the continuation of the results of research aimed at identifying the causes of defects in the thick-walled bushing, die-casting made of CuAl10Fe5Ni5Cr aluminium bronze.
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Influence of Type and Shape of the Chillon Solidification Process of Steel Casting
M. Jaromin
R. Dojka
J. Jezierski
M. Dojka
Archives of Foundry Engineering | 2019 | vol. 19 | No 1
solidification process
Crystallization process
computer simulation
steel castings
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The article is a case study of the steel milling ring casting of about 6 tonnes net weight. The casting has been cast in the steel foundry the authors have been cooperating with. The aim was to analyse the influence of the shape of the chills and the material which was used to make them on the casting crystallization process. To optimally design the chills the set of the computer simulation has been carried out with 3 chills' shape versions and 3 material's versions and the results have been compared with the technology being in use (no chills). The proposed chills were of different thermal conductivity from low to high. Their shapes were obviously dependant on the adjacent casting surface geometry but were the result of the attempt to optimise their effect with the minimum weight, too. The chills working efficiency was analysed jointly with the previously designed top feeders system. The following parameters have been chosen to compare their effectiveness and the crystallization process: time to complete solidification and so-called fed volume describing the casting feeding efficiency. The computer simulations have been carried out with use of MagmaSoft v. 5.2 software. Finally, the optimisation has led to 15% better steel yield thanks to 60% top feeders weight reduction and 40% shorter solidification time. The steel ring cast with use of such technology fulfil all quality criteria.
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Experiments on the Model Testing of the 2nd Phase of Die Casting Process Compared with the Results of Numerical Simulation
J. Dańko
R. Dańko
J. Stojek
Archives of Foundry Engineering | 2015 | No 4
Diecasting process
Model testing
Physical experiments
computer simulation
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Experiments of filling the model moulds cavity of various inner shapes inserted in rectangular cavity of the casting die (dimensions: 280 mm (height) x 190 mm (width) x 10 mm (depth) by applying model liquids of various density and viscosity are presented in the paper. Influence of die venting as well as inlet system area and inlet velocity on the volumetric rate of filling of the model liquid – achieved by means of filming the process in the system of a cold-chamber casting die was tested. Experiments compared with the results of simulation performed by means of the calculation module Novacast (Novaflow&Solid) for the selected various casting conditions – are also presented in the paper.
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Discharge channel displacement simulation in AC arc
Tomasz Daszkiewicz
Witold Tarczyński
Archives of Electrical Engineering | 2010 | vol. 59 | No 1 - 2 September
switching arcs
arc motion velocity
computer AC arc simulation
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Results of 3-D of discharge channel displacement simulation, acquired by means of the Fluent program during one current half-period of AC arc, indicate that the obtained images of the phenomenon are qualitatively similar to those, recorded with a high-speed digital camera, while the computer simulation enables much a more comprehensive analysis of the acquired data. In addition to selected arc simulation frames and corresponding distributions of mass velocity vectors and current density vectors on a plane, the distributions of temperature, current density and mass velocity values are presented on the axis of the electrode arrangement model. The composite motion (continuous and jumping) of discharge channels was analyzed, taking into account mass displacement and matter state changes.
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Multiscale model of heating-remelting-cooling in the Gleeble 3800 thermo-mechanical simulator system
M. Hojny
M. Głowacki
P. Bała
W. Bednarczyk
W. Zalecki
Archives of Metallurgy and Materials | 2019 | vol. 64 | No 1
DEFFEM package
finite element method
Monte Carlo method
physical simulation
computer simulation
extra-high temperatures
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The paper presents a multi-scale mathematical model dedicated to a comprehensive simulation of resistance heating combined with the melting and controlled cooling of steel samples. Experiments in order to verify the formulated numerical model were performed using a Gleeble 3800 thermo-mechanical simulator. The model for the macro scale was based upon the solution of Fourier-Kirchhoff equation as regards predicting the distribution of temperature fields within the volume of the sample. The macro scale solution is complemented by a functional model generating voluminal heat sources, resulting from the electric current flowing through the sample. The model for the micro-scale, concerning the grain growth simulation, is based upon the probabilistic Monte Carlo algorithm, and on the minimization of the system energy. The model takes into account the forming mushy zone, where grains degrade at the melting stage – it is a unique feature of the micro-solution. The solution domains are coupled by the interpolation of node temperatures of the finite element mesh (the macro model) onto the Monte Carlo cells (micro model). The paper is complemented with examples of resistance heating results and macro- and micro-structural tests, along with test computations concerning the estimation of the range of zones with diverse dynamics of grain growth.
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Models of airlift bioreactors for double-substrate kinetics. The analysis of sufficient oxygenation conditions with a view of mathematical model choice
Robert Grzywacz
Chemical and Process Engineering | 2019 | vol. 40 | No 1
airlift biorector
double-substrate kinetics
multiphase bioreactors
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The quantitative description of an airlift bioreactor, in which aerobic biodegradation limited by carbonaceous substrate and oxygen dissolved in a liquid takes place, is presented. This process is described by the double-substrate kinetics. Mathematical models based on the assumption of plug flow and dispersion flow of liquid through the riser and the downcomer in the reactor were proposed. Calculations were performed for two representative hydrodynamic regimes of reactor operation, i.e. with the presence of gas bubbles only within the riser and for complete gas circulation. The analysis aimed at how the choice of a mathematical model of the process would enable detecting the theoretical occurrence of oxygen deficiency in the airlift reactor. It was demonstrated that the simplification of numerical calculations by assuming the "plug flow" model instead of dispersion with high Péclet numbers posed a risk of improper evaluation of the presence of oxygen deficiency zones. Conclusions related to apparatusmodelling and process design were drawn on the basis of the results obtained. The paper is a continuation of an earlier publication (Grzywacz, 2012a) where an analysis of single-substrate models of the airlift reactor was presented.
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Large Eddy Simulation of turbulent flow and heat transfer in a Kenics static mixer
Halina Murasiewicz
Barbara Zakrzewska
Chemical and Process Engineering | 2019 | vol. 40 | No 1
heat transfer
turbulent flow
Large Eddy Simulation
static mixer
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CFD modelling of momentum and heat transfer using the Large Eddy Simulation (LES) approach has been presented for a Kenics static mixer. The simulations were performed with the commercial code ANSYS Fluent 15 for turbulent flow of three values of Reynolds number, Re = 5 000, 10 000 and 18 000. The numerical modelling began in the RANS model, where standard k−ε turbulence model and wall functions were used. Then the LES iterations started from the initial velocity and temperature fields obtained in RANS. In LES, the Smagorinsky–Lilly model was used for the sub-grid scale fluctuations along with wall functions for prediction of flow and heat transfer in the near-wall region. The performed numerical study in a Kenics static mixer resulted in highly fluctuating fields of both velocity and temperature. Simulation results were presented and analysed in the form of velocity and temperature contours. In addition, the surface-averaged heat transfer coefficient values for the whole insert length were computed and compared with the literature experimental data. Good compliance of the LES simulation results with the experimental correlation was obtained.
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Excavation of a Layered Rock Mass with the Use of Transverse Cutting Heads of a Roadheader in the Light of Computer Studies
Piotr Cheluszka
Archives of Mining Sciences | 2018 | vol. 63 | No 4
mathematical modelling
computer simulations
rock mass with layered structure
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Rock excavation is a basic technological operation during tunnelling and drilling roadways in underground mines. Tunnels and roadways in underground mines are driven into a rock mass, which in the particular case of sedimentary rocks, often have a layered structure and complicated tectonics. For this reason, rock strata often have highly differentiated mechanical properties, diverse deposition patterns and varied thicknesses in the cross sections of such headings. In the field of roadheader technology applied to drilling headings, the structure of a rock mass is highly relevant when selecting the appropriate cutting method for the heading face. Decidedly differentiated values of the parameters which describe the mechanical properties of a particular rock layer deposited in the cross section of the drilled tunnel heading will influence the value and character of the load on the cutting system, generated by the cutting process, power demand, efficiency and energy consumption of the cutting process. The article presents a mathematical modelling process for cutting a layered structure rock mass with the transverse head of a boom-type roadheader. The assumption was made that the rock mass being cut consists of a certain number of rock layers with predefined mechanical properties, a specific thickness and deposition pattern. The mathematical model created was executed through a computer programme. It was used for analysing the impact deposition patterns of rock layers with varied mechanical properties, have on the amount of cutting power consumed and load placed on a roadheader cutting system. The article presents an example of the results attained from computer simulations. They indicate that variations in the properties of the rock cut – as cutting heads are moving along the surface of the heading face – may have, apart from multiple other factors, a significant impact on the value of the power consumed by the cutting process.
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Analysis of the reliability of photovoltaic-micro-wind based hybrid power system with battery storage for optimized electricity generation at Tlemcen, north west Algeria
Mohammed Salim Hadjidj
Nacereddine Bibi-Triki
Faouzi Didi
Archives of Thermodynamics | 2019 | vol. 40 | No 1
Photovoltaic system
Wind system
Hybrid photovoltaic-wind-storage system
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This article considers designing of a renewable electrical power generation system for self-contained homes away from conventional grids. A model based on a technique for the analysis and evaluation of two solar and wind energy sources, electrochemical storage and charging of a housing area is introduced into a simulation and calculation program that aims to decide, based on the optimized results, on electrical energy production system coupled or separated from the two sources mentioned above that must be able to ensure a continuous energy balance at any time of the day. Such system is the most cost-effective among the systems found. The wind system adopted in the study is of the low starting speed that meets the criteria of low winds in the selected region under study unlike the adequate solar resource, which will lead to an examination of its feasibility and profitability to compensate for the inactivity of photovoltaic panels in periods of no sunlight. That is a system with fewer photovoltaic panels and storage batteries whereby these should return a full day of autonomy. Two configurations are selected and discussed. The first is composed of photovoltaic panels and storage batteries and the other includes the addition of a wind system in combination with the photovoltaic system with storage but at a higher investment cost than the first. Consequently, this result proves that is preferable to opt for a purely photovoltaic system supported by the storage in this type of site and invalidates the interest of adding micro wind turbines adapted to sites with low wind resources.
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The impact of measures aimed at reducing low-stack emission in Poland and on energy efficiency and the household emission of pollutants
Dominik Kryzia
Monika Pepłowska
Polityka Energetyczna - Energy Policy Journal | 2019 | vol. 22 | No 2
| 121-132
energy efficiency
Monte Carlo simulation
low-stack emission
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According to the European Environment Agency (EEA 2018), air quality in Poland is one of the worst in Europe. There are several sources of air pollution, but the condition of the air in Poland is primarily the result of the so-called low-stack emissions from the household sector. The main reason for the emission of pollutants is the combustion of low-quality fuels (mainly low-quality coal) and waste, and the use of obsolete heating boilers with low efficiency and without appropriate filters. The aim of the study was to evaluate the impact of measures aimed at reducing low-stack emissions from the household sector (boiler replacement, change of fuel type, and thermal insulation of buildings), resulting from environmental regulations, on the improvement of energy efficiency and the emission of pollutants from the household sector in Poland. Stochastic energy and mass balance models for a hypothetical household, which were used to assess the impact of remedial actions on the energy efficiency and emission of pollutants, have been developed. The annual energy consumption and emissions of pollutants were estimated for hypothetical households before and after the implementation of a given remedial action. The calculations, using the Monte Carlo simulation, were carried out for several thousand hypothetical households, for which the values of the technical parameters (type of residential building, residential building area, unitary energy demand for heating, type of heat source) were randomly drawn from probability distributions developed on the basis of the analysis of the domestic structure of households. The model takes the coefficients of correlation between the explanatory variables in the model into account. The obtained results were multiplied so that the number of hypothetical households was equal to 14.1 million, i.e. the real number of households in Poland. The obtained results allowed for identifying the potential for reducing the emission of pollutants such as carbon dioxide, carbon monoxide, dust, and nitrogen oxides, and improving the energy efficiency as a result of the proposed and implemented measures, aimed at reducing low-stack emission, resulting from the policy. The potential for emissions of gaseous pollutants is 94% for CO, 49% for NOx, 90% for dust, and 87% for SO2. The potential for improving the energy efficiency in households is around 42%.
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Assessment of Ground Vibrations Induced by Gas and Oil Well Drilling Using Numerical Simulations
Andrzej Truty
Zenon Pilecki
Krzysztof Stypuła
Rafał Wiśniowski
Krzysztof Kozioł
Stanisław Stryczek
Archives of Mining Sciences | 2019 | vol. 64 | No 2
ground vibrations
gas/oil drilling rigs
FEM simulations
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This work presents the methodology for analyzing the impact of ground vibrations induced during the drilling of gas/oil exploration wells on the surrounding constructions, as well as on humans and the natural environment. In the primary stage, this methodology is based on measurements of ground vibrations induced by a specific type of drilling system in the so-called reference site. In the next stage, ground vibrations are estimated in similar conditions to another design site, these conditions are assumed for a given drilling system, treated as a vibration source. In both sites, special seismic and geotechnical data are collected to construct numerical models for dynamic analyses. Finally, if it is required, a protection system is proposed with respect to the drilling technology and local conditions. The methodology presented has been tested on the terrain of an active natural gas mine used as the design site, and located in the southeastern part of Poland. The reference site was placed in the terrain of a working drilling system in similar conditions in the central part of Poland. Based on the results of numerical simulations, one may verify the different locations of the drilling rig in the design site with respect to the existing industrial structure. Due to the hazard from destructive ground vibrations, a certain vibroisolation system was proposed at the design site. Based on the results of numerical simulations one could rearrange the components of the drilling system in order to provide maximum security for the surrounding structures.
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Effects of combustion products composition models on the exergetic analysis of spark-ignition engine fuelled with ethanol
Caio H. Rufino
Alessandro J.T.B. de Lima
Ana P. Mattos
Fazal U.M. Allah
Janito V. Ferreira
Waldyr L.R. Gallo
Archives of Thermodynamics | 2019 | vol. 40 | No 3
Engine simulations
Combustion products
Spark-ignition engines
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The engine simulations have become an integral part of engine design and development. They are based on approximations and assumptions. The precision of the results depends on the accuracy of these hypotheses. The simplified models of frozen composition, chemical equilibrium and chemical kinetics provide the compositions of combustion products for engine cycle simulations. This paper evaluates the effects of different operating conditions and hypotheses on the exergetic analysis of a spark-ignition engine. The Brazilian automotive market has the highest number of flex-fuel vehicles. Therefore, a flex-fuel engine is considered for simulations in order to demonstrate the effects of these different hypotheses. The stroke length and bore diameter have the same value of 80 mm. The in-cylinder irreversibility is calculated for each case at the closed part of the engine cycle. A comparative analysis of these hypotheses provides a comprehensive evaluation of their effects on exergetic analysis. Higher values of accumulated irreversibility are observed for the oversimplified hypothesis.
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The Influence of Riser Shape on Feeding Effectiveness of Solidifying Casting
L. Sowa
T. Skrzypczak
P. Kwiatoń
Archives of Foundry Engineering | 2019 | vol. 19 | No 4
Solidification process
Castings defects
Numerical simulation
Liquid metal flow
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The mathematical model and numerical simulations of the solidification of a cylindrical shaped casting, which take into account the process of filling the mould cavity by liquid metal and feeding the casting through the riser during its solidification, are presented in the paper. Mutual dependence of thermal and flow phenomena were taken into account because have an essential influence on solidification process. The effect of the riser shape on the effectiveness of feeding of the solidifying casting was determined. In order to obtain the casting without shrinkage defects, an appropriate selection of riser shape was made, which is important for foundry practice. Numerical calculations of the solidification process of system consisting of the casting and the conical or cylindrical riser were carried out. The velocity fields have been obtained from the solution of momentum equations and continuity equation, while temperature fields from solving the equation of heat conductivity containing the convection term. Changes in thermo-physical parameters as a function of temperature were considered. The finite element method (FEM) was used to solve the problem.
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Working temperature calculation of single-core cable by nonlinear finite element method
Xiaokai Meng
Peijie Han
Yongxin Liu
Zhumao Lu
Tao Jin
Archives of Electrical Engineering | 2019 | vol. 68 | No 3
finite element simulation model
thermal conductivity
operating temperature
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By simulating the actual working conditions of a cable, the temperature variation rule of different measuring points under different load currents was analyzed. On this basis, a three-dimensional finite element model (FEM) was established, and the difference and influence factors between the simulation temperature and the experimental measured value were discussed, then the influence of thermal conductivity on the operating temperature of the conductor layer was studied. Finally, combined with the steady-state thermal conductivity model and the experimental measured data, the relation between thermal conductivity and load current was obtained.
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Operational Characteristics of Tube Bends Made Using Local Induction Heating of the L360NE (X52) Steel
G. Junak
T. Kawała
M. Cieśla
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 4
L360NE (X52) steel
tube bending
computer simulation
mechanical properties
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The paper presents the evaluation of utility properties of a tube bend produced by bending process using local induction heating technique. Optimal process parameters were defined on the basis of numerical simulations. Mechanical testing procedures for the tube bend were carried out after normalising annealing. Heat treatment parameters have been chosen in compliance with the relevant standard. Geometrical measurements of the bend manufactured under industrial conditions indicate high accuracy of numerical simulations. Geometry and mechanical properties of the produced bend were consistent with the requirements of the applicable standards.
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Computer Simulation of the Solidification Process Including Air Gap Formation
T. Skrzypczak
L. Sowa
E. Węgrzyn-Skrzypczak
Archives of Foundry Engineering | 2017 | vol. 17 | No 4
Solidification process
computer simulation
finite element method
Multi-mesh approach
Air gap
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The paper presents an approach of numerical modelling of alloy solidification in permanent mold and transient heat transport between the casting and the mold in two-dimensional space. The gap of time-dependent width called "air gap", filled with heat conducting gaseous medium is included in the model. The coefficient of thermal conductivity of the gas filling the space between the casting and the mold is small enough to introduce significant thermal resistance into the heat transport process. The mathematical model of heat transport is based on the partial differential equation of heat conduction written independently for the solidifying region and the mold. Appropriate solidification model based on the latent heat of solidification is also included in the mathematical description. These equations are supplemented by appropriate initial and boundary conditions. The formation process of air gap depends on the thermal deformations of the mold and the casting. The numerical model is based on the finite element method (FEM) with independent spatial discretization of interacting regions. It results in multi-mesh problem because the considered regions are disconnected.
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Variation of Strata Pressure and Axial Bolt Load at a Coal Mine Face Under the Effect of A Fault
Hao Shi
Houquan Zhang
Lei Song
Yu Wu
Archives of Mining Sciences | 2019 | vol. 64 | No 2
FLAC3D numerical simulation
Axial bolt load
Strata behavior
Mining and Fault effect
Strain-softening model
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The cohesion and internal friction angle were characterized as quadratic functions of strain and were assumed to follow the Mohr-Coulomb criterion after the yield of peak strength. These mechanical parameters and their variations in post-peak softening stage can be exactly ascertained through the simultaneous solution based on the data points of stress-strain curves of triaxial compression tests. Taking the influence of the fault into account, the variation of strata pressure and roadway convergence with coal advancement, the temporal and spatial distribution of axial bolt load were numerically simulated by FLAC3D (Fast Lagrangian Analysis of Continua) using the ascertained post-peak mechanical parameters according to the cohesion weakening and friction strengthening model. The change mechanism of axial load of single rock bolt as abutment pressure changes was analyzed, through the comparison analysis with the results of axial bolt load by field measurements at a coal mine face. The research results show that the simulated results such as the period of main roof weighting, temporal and spatial distribution of axial bolt load are in accordance with field measurement results, so the validity of the numerical model is testified. In front of the working face, the front abutment pressure increases first and then decreases, finally tends to be stable. A corresponding correlation exists between the variation of axial bolt load and rock deformation along the bolt body. When encountered by a fault, the maximum abutment pressure, the influential range of mining disturbance and the roadway convergence between roof and floor before the working face are all increased. In the roadways along the gob, axial bolt loads on the side of the working face decrease, while the other side one increases after the collapse of the roof. As superficial surrounding rock mass is damaged, the anchoring force of rock bolts will transfer to inner rock mass for balancing the tensile load of the bolts.
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Simulation Study on Strength and Failure Characteristics of Coal-Rock Composite Sample with Coal Persistent Joint
Dawei Yin
Shaojie Chen
Bing Chen
Zhiguo Xia
Archives of Mining Sciences | 2019 | vol. 64 | No 3
particle flow simulation
coal-rock composite sample
coal persistent joint
strength and failure characteristics
microcrack number evolution
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Dynamic Mine disasters can be induced by the instability and failure of a composite structure of rock and coal layers during coal mining. Coal seam contains many native defects, severely affecting the instability and failure of the compound structure. In this study, the effects of coal persistent joint on the strength and failure characteristics of coal-rock composite samples were evaluated using PFC2D software. The results show that with the increase of included angle α between the loading direction and joint plane direction, the uniaxial compressive stress (UCS) and peak strain of composite samples first decrease and then gradually increase. The elastic moduli of composite samples do not change obviously with α. The peak strain at α of 45° is the lowest, and the UCS at α of 30° is the smallest. This is inconsistent with theoretical analysis of lowest UCS at α of 45°. This is because that the local stress concentration caused by the motion inconformity of composite samples may increase the average axial stress of upper wall in PFC2D software. Moreover, the coal persistent joint promotes the transformation from the unstable crack expansion to the macro-instability of composite samples, especially at α of 30° and 45°. The majority of failures for composite samples occur within the coal, and no obvious damage is observed in rock. Their failure modes are shear failure crossing or along the coal persistent joint. The failure of composite sample at α of 30° is a mixed failure, including the shear failure along the persistent joint in coal and tensile failure of rock induced by the propagation of coal persistent joint.
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BALTIMORE – UMBC women's soccer's exploded for six goals in game one of the Battle of Baltimore on Friday evening at Ridley Athletic Complex. Senior midfielder Lilly Rydon (Adelaide, South Australia/Concordia College) led the charge with her first collegiate multiple-goal game, including the game-winner, in the 6-0 victory against Mount St. Mary's.
Rydon scores are her fourth in the last four games. She leads the team with four goals and eight points on the season.
The Retrievers rebound from last Friday's loss to Saint Joseph's and improve to 5-1 on the season, while Mount St. Mary's remain winless at 0-8. UMBC continues its best start since 1996, when it also started the year at 5-1.
Sophomore Meg Kowalski setup the first scoring opportunity, drilling a shot that goalkeeper Rachel Bourne swatted wide of the net. Freshman forward Lisa Nanov (Mechanicsburg, Pa./Cumberland Valley) took the ensuing corner and Rydon was able to get inside the box and put a head on the ball, slotting it past Bourne to give the Retrievers the 1-0 lead.
Junior back Nikki Boretti (Garmisch, Germany/Archbishop Spalding) added her second goal of the season in the 36th minute. Boretti chipped in the score off a free kick from fellow back Melissa Hummel (Downingtown, Pa./Downingtown East) for the 2-0 lead. Hummel, who led the team in assists last season, made her first appearance of the 2014 season.
Senior midfielder Jessy Brown (Plantation, Fla./American Heritage) got in on the action with 1:09 left in the first stanza, heading a ball just inside the crossbar, to extend the Retrievers' advantage to 3-0 at the break. Hummel picked up her second assist of the contest on the play, sending in a corner kick for the helper.
The Retrievers finished the opening half with an 8-3 shot advantage and a 4-0 lead in corner kicks.
UMBC did not slow down in the second half, as Kowalski poked the ball loose from the Mount St. Mary's defense and sophomore Amanda Dailey (Freehold, N.J./Freehold Township/Monmouth) turned around for the long strike past the Mount's second-half goalkeeper Vicky Cocozza in the 52nd minute. Dailey's score also came on her first action of the season.
The Retrievers continued on the offensive end as red-shirt freshman Destinee Morris (La Plata, Md./La Plata) notched her first collegiate goal following a touch on a bouncing ball from freshman Virginia Moyer (Elizabethtown, Pa./Elizabethtown). The helper was the rookie's first point of the year and came in the 65th minute.
Rydon added her second goal of the game, heading in a ball from senior back Morgan Taylor (Severna Park, Md./Severna Park) in the 81st minute to make it a six-goal contest.
Junior goalkeeper Jen Nance (Millersville, Md./Severna Park) made two stops in her fifth victory of the season. Sophomore Annette Cappellino (Rochester, N.Y./Penfield) made her collegiate debut in the second half.
The Retrievers finished with 15 shots on the night, placing 14 on goal. UMBC assist all six of its scores and held a 6-0 advantage in corner kicks.
On the Horizon
-UMBC continues action in the Battle of Baltimore on Sunday, Sept. 14 when it travels to Towson, Md. to take on the Tigers. Game time is set for 2:30 p.m. at Tiger Soccer Complex. UMBC head coach Leslie Wray faces her former team for the first time since coming on as head coach of the Retrievers.
Game Notes
-UMBC snaps a two-game losing streak against the Mount, taking a 13-2 lead in the all-time series.
-UMBC's six goals were its highest total since 2002 when the Retrievers' defeated Delaware State, 12-0, on Sept. 22.
-The Retrievers earn their third shutout of the season. UMBC has allowed four goals in six games.

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Organization is a good place to start. It doesn't require much long term thinking and it is easily broken in to smaller, simple tasks. What are my goals for an organized life:
- To reduce the amount of useless stuff
- To ensure that the remaining good stuff is where I can find it when I need it
- To store stuff so that it remains optimally functional.
- Have things on shelves or put away.
- To have everything arranged so that it is conducive to moving.
For me the best way to start to tackle these goals are fractional, spatial, and temporal thinking. In other words, break the stuff into different categories, figure out where each group of stuff should be ideally stored, and identify the priority/importance of these tasks.
So Many Pictures, So Much information – Right now, we have computer files on at least four computers, two external hard drives and the "cloud". Some of the files are duplicates, backed up in multiple places, others are only stored in a single location. With phones and digital cameras snapping away we have accumulated several tens of thousands of pictures onto my computer. We've got double and triples and then sometimes can't even find the important photos we are looking for. Since computer storage space isn't the limiting factor anymore (thanks to the smallness of terabyte hard drives) the big problem is organization. My objective over the year is to make sure that even if computers are going to be used for different purposes, all the information is central and backed up. This will be quite an undertaking and will take some time to break it down into smaller blocks that can be accomplished in the usually short periods of time I have to do such activities.
- Create on the main computer a filing system that is self-explanatory
- File names and group should be easy to recognize and understand.
- Photos files will group pictures by people, topic, or event.
- Individual file names should reflect the actual content.
- Starting with the photos move from download files to organized file, one set at a time. This provides the discrete unit and can be usually done quickly, even while watching video or something.
- Once the photos are done do the same for the other files.
- Transfer information from hard drives and other computers to the main computer in small hunks so that only the non-duplicate/useful files are transferred over.
- Once this information centralization and organization has been done, back up the shit out of everything (actually things should be backed up continuously, but that is outside the purview of this set of goals).
One Tub At a Time – So far, I've managed to corral most of the unorganized stuff into tubs in the garage. It at least looks organized. There are tubs of Legos, outdoor equipment, fishing tackle, aquarium parts, Christmas decorations, and several tubs just labeled miscellaneous. Lots of those are chocked full of items, stuffed in to facilitate transport from Duluth to Columbia. Here I think that it can be tackled a box at a time. It is going to start with a series of questions (some are in sequence but most need to be answered):
- Will we ever use this again?
- Does it work? – Can it be fixed? – Is it worth fixing?
- Does it have value? – Is that value monetary or emotional?
- Is this worth keeping?
- Do we even want this? – Could some else benefit from having this more than us?
- Is it part of a larger group of things that can all be stored together?
Going through the tubs of stuff is something that Sara and I likely need to do together (at least for some of them). Luckily I've got some empty tubs so that will make sorting easier. This process can be done one at a time. And it is not time sensitive, so a spare hour after Katie goes to bed should be enough time to get through most tubs. Once the items in the tubs are sorted out, the key will that all the stuff that comes out goes back into tubs according to common groupings. Once that is done comes the organization of the shelves.
How Many Damn Books Do You Own – Both Sara and I love books. We have those that define our professional lives, those that made us laugh or cry or think, those that we've read dozens of times, and those that we've pretended to read to seem smart. The books were packed without much thought as to their long term future (not their physical usefulness, as they were well packed with great care). I built one bookcase and got some boxes out of the garage and onto shelves. But some of those shelves got taken up by a mobile Katie. So the plan is to build more bookcases is in the works (I actually own the wood now). But, Sara and I have differing opinions about the utility of bookcases, she likes some shelves for photos and knick-knacks, I prefer only books. Either way unless we are going to line every wall with shelves there needs to be a culling. The book cull will follow some rules:
- Has it ever been read? Will it ever be read? Would it be read again?
- If it hasn't been read, does keeping it around make me feel smart?
- Do I want to keep it just because?
Once the book herd is thinned, they can be organized. With enough shelves (hopefully) I can put books into appropriate grouping.
Why Do I Still Have Paper Records – I don't know why this is true, but it is and those records need to be organized. This is just a matter of sitting down and going through the paperwork and the file box. At one point things were already in files, but this has gotten a bit jumbled over the years. The other thing that needs to happen is that important files (birth certificates, car titles, etc.) should be moved into a water/fireproof safe. I don't own a safe, but am hoping to get one for my birthday perhaps. This is the lightest of all the tasks and really just needs a dedicated few hour one evening.
Clothes Horse – I seem, despite being very picky about clothing, to have accumulated a lot of it. I have lots of clothes that need to go. I am not good at this. I get sentimental. I think that I will eventually be thinner and thus able to fit into that again. I think well maybe I will eventually wear that terrible colored shirt. Basically, to organize my clothes I have to get over myself. It would be great if I could cut down significantly. Even if I lose weight, shirts are still going to fit. And maybe that new pair of jeans I need can be part of a weight loss incentive. I think this has to be a single event like a band aide. I can't let it drag out or I will never be able to do it. I just need to attack my closet on an evening when nothing much else is going on and when I can be sure to stop at Goodwill on my way home from work. Once the clothing bulk is reduced then a better system of organization will be self-evident. The most likely time for this to happen is when we bring in/put together our new IKEA dressers. Since that is supposed to happen soon maybe the clothing thing can happen soon too.
The Shelf Plan – Once the individual things are all organized and the bookcases built organization will come down to shelf planning. I've got lots of shelves, and I'm building more. The big thing is plan according to usage. Things that get used a lot should be easiest to reach. This will also facilitate the next move so that if things are condensed and stored in boxes or tubs they are much easier to use.
If I Can Accomplish This – My life would be pretty organized if I can get these things done. None of it is urgent right now, but I expect a move at some point in the future and this plan/goals/objectives would go a long way to making the next move a bit easier. I'm leaving out things that I feel Sara will have the definitive decision on (decorations – where I've proved mostly to poor and/or fish related choices, knitting stuff, Pyrex dishes) or where it will be most appropriate to have discussions and make family decisions (kitchen stuff, Katie's stuff).
GOGOBEAR ACTIVATE: This was the first of the GOGOBEAR goals to be written. It was probably the easiest to write and think about, but the reality of life suggest that it might have the greatest utility in the end. If you read this far, congratulations, this was a lot of information that likely doesn't have a lot of relevance to outside readers, but thanks for your caring and persistence.


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Jurgen Klopp has spoken of his special relationship with his Liverpool squad ahead of the Reds' Champions League showdown with Real Madrid following a "crazy" campaign.
Liverpool travel to Kiev in the hopes of securing their first European title in 13 years, against a Madrid side in the hunt for their third successive Champions League triumph.
Klopp's side have overcome Porto, Manchester City and Roma in the knock-out stages, netting 17 goals across the three ties.
And the German, whose Borussia Dortmund side were beaten by Bayern Munich in the 2012-13 final, has no doubts Liverpool have earned their place in Saturday's final.
"I'm immensely proud of what the boys have achieved," Klopp told UEFA's official website.
"The number of goals we scored is simply crazy. We've scored seven goals twice and five goals twice, too.
"That's really [crazy], because we aren't Barcelona, we aren't Real Madrid or Bayern Munich. We are Liverpool, on the way to becoming a really good team.
"It's been a crazy ride, but we've earned our place here.
"Me as a person, I want to have a close relationship with them, because I want to understand [the players].
"I'm grateful to them for what they've achieved. There are many teams at the same level as us, who earn as much or even more than our players, but they don't perform as well."
0 – @LFC are the only side unbeaten at home in the top four tiers of English league football this season. Advantage. #LIVBHA pic.twitter.com/KDfYLS8sts
— OptaJoe (@OptaJoe) 13 May 2018
Standing in the way of Liverpool are holders Madrid who, despite having had a poor domestic season, have excelled on the European stage.
Zinedine Zidane's side have had to see off Paris Saint-Germain, Juventus and Bayern on their way to the final, and Klopp has great admiration for his French counterpart.
"[Zidane] is one of the top five players of all time," Klopp added.
"I'm glad we're not playing against each other – me marking him, or whatever.
"I'm very glad I can send my players on to the pitch. Just meeting him is awesome. I admired him as a player and respect him as a colleague.
"It's incredible what he's been doing with Madrid. It's really, really extraordinary. But we're not going to grab some jerseys."
7 – Real Madrid's last seven European Cup/Champions League finals:
4-1 vs Juventus in 2017
1-1 vs Atletico in 2016
4-1 vs Atletico in 2014
2-1 vs B. Leverkursen in 2002
3-0 vs Valencia in 2000
1-0 vs Juventus in 1998
0-1 vs LIVERPOOL in 1981
Kiev pic.twitter.com/jyVxneLBpX
— OptaJose (@OptaJose) 2 May 2018
- Soccer News Like
- Be the first of your friends!


text:
Monday November 18th 2013 –Conference organized by the Master's 201 in Monetary and Financial Economics
Monday, November 18th 2013 at 6 pm in Room A 709, Université Paris-Dauphine main campus.
Conference organized around the publication of "Crash machine or How high-frequency Traders could bring down the stock market" (Krach Machine : Comment les traders à haute fréquence menacent de faire sauter la bourse).
Frédéric LELIEVRE, Editor of the Economics and Finance column for Le Temps newspaper, will present his book and mediate the conference.
Mathieu ROSENBAUM, Professor of Economics at Université Paris Dauphine and at the Ecole Ploytechnique, and specialist in Financial Market Microstructure , will give the opening speech.
A cocktail , in the 7th floor lobby will follow the conference (7th floor, A-wing).


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100 Women in Hedge Funds ("100WHF"), a leading non-profit organisation for professionals in the Alternatives industry,has announced that the Duchess of Cambridge and Prince Harry will now join the Duke of Cambridge with his patronage of 100WHF's philanthropic initiatives, beginning January 1, 2013. Over the next three years, this non-profit organisation will focus its activity on Kate's charities, The Art room, Action and Addiction and Harry's charity Wellchild.
Founded in 2001, 100WHF offers its members unique educational, professional and philanthropic opportunities, and will focus its UK philanthropy on three specially chosen charities, one for each year of the partnership. 100WHF will continue to serve on The Charities Forum of The Duke and Duchess of Cambridge and Prince Harry to lend more general support to other Forum members. The young royals will now use their profiles to champion the work of 100 Women in Hedge Funds, which helps support charities in family health, mentoring and education and has so far raised $25 million (£15 million).
Commenting on the announcement, Mimi Drake, Global Chair of the Board of 100WHF and President of Permit Capital Advisors, said "We are thrilled to expand our partnership with The Duke of Cambridge to include The Duchess of Cambridge and Prince Harry. We share a common passion for charities in the areas of education, mentoring and family health. To date, our partnership has significantly impacted the charities we have supported and we look forward to building upon that success."
100WHF enables its members and the broader community to make a difference through a series of global philanthropic initiatives. Through the dedication and hard work of its volunteer members and industry supporters, and their generous donations to its fundraising efforts, the organisation has made a positive impact on the lives of hundreds of thousands of people globally.
"When we first met The Duke of Cambridge, our shared interest in philanthropy and desire to leverage our efforts to have maximum impact formed the basis for our partnership and for our membership of TRH's Charities Forum. That shared goal continues today, and we are pleased that the partnership will be expanded to include both The Duke and Duchess of Cambridge, and Prince Harry," said Anne Popkin, 100WHF Association Board member and President of Symphony Asset Management.
Chair of the Board of the organisation, Mimi Drake said: "To date, our partnership has significantly impacted the charities we have supported and we look forward to building upon that success."
The Art Room works with children to increase their self-esteem, self-confidence and independence through art. Many of the children are disengaged from mainstream education, disruptive or withdrawn and all have been identified as needing time away from their school. The charity's emphasis is on teaching life skills while encouraging children and young people to both relate and engage with each other. The Art Room employs senior practitioners who are trained in psychotherapy, art, teaching and social work. The charity currently works in Oxford and in north London. The Duchess of Cambridge became Royal Patron of The Art Room in January 2012.


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Still pissed off that Roger Clemens spurned the Astros to return to the Yankees?
Don't be.
Actually, any baseball fan already knows the Rocket sucked this year. But Darren Rovell, a sports-business reporter for CNBC, broke things down with a vengeance.
Add in the luxury tax foisted on the Yanks for their bloated payroll, and this is the return they got on the Clemens contract:
Per Pitch: $15,047 Per Inning: $245,213 Per Start: $1,375,921 Per Win: $4,127,763
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You have successfully signed up for your selected newsletter(s) - please keep an eye on your mailbox, we're movin' in!
A quarter-million per inning? Imagine what he'd get if he was any good. – Richard Connelly


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Advice on supplement program?
A forum dedicated to getting the rider healthy and fit and ready to ride!!
1 post • Page 1 of 1
- Greenie
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- Joined: Wed Dec 05, 2018 12:04 am
Advice on supplement program?
I am looking at a few different options, just wanted some input. I just hit 51, still work out daily. Looking for I guess a combo of a testosterone boost, with strength and endurance/recovery increase to maintain my regimen. Has anyone tried bdg performance labs, the first thing that came up when I search this seems to fit just want some more input from the gurus before I buy lol. Any other options you guys subscribe to? I want something effective as well as safe of course.
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Stroman is medical director for FVTC's public safety training center
Wed, Oct 7, 2015
APPLETON – Dr. Steven J. Stroman, an emergency medicine physician with BayCare Clinic in Green Bay, is the new medical director at Fox Valley Technical College's public safety training center.
Stroman, who accepted the position in September, will help the facility maintain regulatory compliance and quality assurance. He'll also help develop advanced programs in critical care and tactical and community emergency medical services, among others.
"I welcome the opportunity to pass on the knowledge I've gained through years of medical training and experience,"Stroman said. "It's a chance to reinforce the importance of continued learning and shared expertise as well as staying informed on the latest techniques and technologies that enhance our ability to save lives during emergencies."
The nearly 80-acre public safety training center provides hands-on tactical training for students and public safety professionals. It is used to train students in firefighting, investigation, technical rescue, pursuit, air disasters, and more.
About BayCare Clinic
BayCare Clinic, www.baycare.net, is the largest physician-owned specialty-care clinic in Northeast Wisconsin and Michigan's Upper Peninsula. With its 100-plus physicians, BayCare Clinic offers expertise in more than 20 specialties, serving clinical locations in 13 regional communities. Based in Green Bay, Wis., BayCare Clinic is a joint partner in Aurora BayCare Medical Center.
About Fox Valley Technical College Public Safety Training Center
Located adjacent to Outagamie County Regional Airport in Appleton, Wisconsin, the Center combines classroom training with hands-on practice in a real-world setting. The PSTC will be used to train tactics, investigation, firefighting, technical rescue, pursuit, air disasters, and much more. No other fully integrated training facility exists in the Midwest and only a handful of other facilities meet even a portion of the combined training needs that this facility offers.
Fox Valley Technical College is an official training partner of the Federal Bureau of Investigation (FBI).


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If you appreciate the 'Traveteer' proposal, you can make a virtual vote by sharing a link to this page on your preferred social media platform. We are tracking each project proposal page on the back end and will give a special 'Popular Vote Grant' for $500 to the project that has been shared the most by September 16th.
ESTIMATED COST: The grant will cover our initial launch costs including licensing, user research and testing, app design, and development. As a social impact venture, we are intending to have development donated. However, there are many costs associated with that such as web hosting and prototyping tools. We will also need to seek legal counsel and have a business plan developed. The grant will help in compensation for these needs.
TIMELINE: Traveteer will launch within 9 months. However, the project will be ongoing
DREAM MENTOR: A dream mentor would be someone who understands how technology can serve the world in a meaningful way.
Traveteer is a social platform (web interface and downloadable app) that will change the culture of voluntourism by making it convenient to be a traveling volunteer. Born of a love for connecting with authentic culture and a passion for philanthropic pursuits, Traveteer will allow people that are interested in incorporating short-term volunteer opportunities with social impact organizations.
In 2014 there were 1.333 billion international tourist arrivals worldwide. Travelers from the U.S. increased by 7% from last year and the trend suggests that this number will keep rising. With the increasing income gap in the world, it is more important than ever for individuals to be able to connect with and give back to social impact organizations worldwide. Traveteer will make that connection possible, enticing, and meaningful.
Traveteer will provide a space for people from all demographics and skill sets to find new volunteer opportunities and to share about their past experiences. Using a mutual rating and review system, volunteers and social impact organizations will be able to get a firm idea of what they are working on and who they are working with ahead of time. This means that organizations will be able to get their specific needs met and volunteers can spend meaningful and engaged time in the culture that they are visiting.
A major problem plaguing the world of voluntourism is the frequent mismatch of needs and the volunteers that show up to fill those needs. Often times volunteers become a burden to organizations that don't have the bandwidth to train volunteers. Organizations will be able to post specific roles that they need filled and Traveteer will allow organizations and individuals to find the right volunteer and the right volunteer experience through the use of filters, reviews, and profiles.
Traveteer will bridge the gap between social impact organizations in need of human-power and individuals that want to contribute in a meaningful way. Whether you are planning on taking the trek to Machu Picchu or spending a few relaxing days on the beach in the Caribbean, there are myriad ways to contribute to the communities in which you are spending your time. Traveteer will make it convenient to find opportunities for deep, authentic human connection between individuals around the world through voluntourism.
Images from top are:
Landing page experience - prior to signing up
Homepage after user is signed in
Personal bio page
Visual representation of iPad experience
(Included screens are initial concepts and still in visual and UX development. Photography used within the screens are for concept only and we did not produce the photography.)


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will there be any way a map maker can have a gold value thats separate than an army value for a bonus?
Seems like someone censorsheeped the truth!Either way, if anyone is up for a RT sneak peek game, send me a msg, I'd love to try it out
And there's no way to open the game in the stand-alone version
Which means you don't have to deploy anything.
Also I know U for autopilot in Unity (what else is there in Unity)?
So if you have 30 income, but only 30 gold, you can only deploy 20 armies, and your other 10 armies are wasted?
Will it be someday added for non-members?
So there's no plan to add this to Flash version
Also, there's tournament bug associated
No word on when that is , yet.


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Return to: Degrees and Certificates by Type
Program Description The Bachelor of Applied Science (BAS) in Child, Youth, and Family Studies degree provides advanced knowledge and skills for professional positions in educational settings for young children and social services programs for youth and families. The degree integrates Early Childhood Education and Social and Human Services in an interdisciplinary program that enhances career opportunities and benefits the well-being of children, youth, and families. The BAS offers a direct pathway to a bachelor's degree for students who have completed an Associate of Applied Science-Transfer (AAS-T) degree in Early Childhood, Social and Human Services, Addiction Studies, or Family Support Studies.
Acceptance into the Bachelor of Applied Science program is by application only and requires fulfilling admittance requirements with completion of an AAS-T degree in Early Childhood Education, Social and Human Services, Addiction Studies, or Family Support Studies, or equivalent. Students with an Associate of Technical of Arts (ATA) degree in one of these areas are encouraged to consult with an advisor regarding additional prerequisite course requirements to be completed before beginning the program.
This BAS degree is awarded upon completion of a minimum of 180 credits as outlined.
Advising Note This program requirement sheet is not a substitute for meeting with an academic advisor. Meeting the requirements to graduate with an Edmonds CC degree is ultimately the responsibility of the student.
This degree requires the completion of an Associate of Applied Science-Transfer (AAS-T) degree, including a minimum of 60 credits of professional-technical courses from a regionally-accredited school to demonstrate proficiency in one of the following career areas:
_______See Program Manager to complete Proficiency Form for transfer of credits to complete this requirement. All requirements met.
OUTCOME: Communicate and interact effectively through a variety of methods appropriate to audience, context, purpose, and field/discipline.
OUTCOME: Reason clearly using academic or professional modes of inquiry; using quantitative or symbolic reasoning; and/or using other discipline/field specific methods to explore and create ideas; identify information needs; process, evaluate, and use information; and recognize, analyze, and solve problems.
Any college-level Math course
OUTCOME: Use Humanities-based methods to reason, communicate, make meaning, solve problems and/or create or perform cultural works for diverse audiences and purposes.
and one of the following courses:
OUTCOME: Use scientific and mathematical methods, modes of inquiry, and terminology to demonstrate knowledge, comprehension, and application of science concepts and insights.
OUTCOME: Use Social Science theories and methods to reason, communicate, apply insights, solve problems, and to develop a critical understanding of the diversity and interdependence of peoples and cultures.
Choose two of the following:
Choose three additional courses from the Humanities, Natural Sciences and Mathematics, or Social Sciences courses listed in the above categories or from the following options:
The program code for this degree is 42B. For financial aid, advising, and other reasons, students should work with their advisor to ensure that this code is properly recorded on their academic record.
This program is designed for students who have completed an AAS-T degree in Early Childhood Education, Social and Human Services, Family Support Studies, or Addiction Studies, or who have completed an ATA in one of these areas and taken additional prerequisite general education courses. Contact the Child, Youth, and Family Studies department in the Health and Human Services division for details.
The Bachelor of Applied Science in Child, Youth, and Family Studies program is by application only; meeting minimum requirements does not guarantee admission.
Admissions Checklist:
Completion of an AAS-T, or equivalent degree, in ECE, SHS, FSS, or Addiction Studies.
Minimum cumulative 2.5 GPA and minimum grade point of 2.0 in core courses of the AAS-T, or equivalent degree, in specified fields.
Admissions into Edmonds Community College.
Non-refundable $25.00 BAS application fee.
Application and supplemental forms.
Two to three page personal statement, following specified prompts outlined in application packet.
Resume describing relevant work and skills, including internships, work study, and volunteering activities, and length of time at each.
Two professional recommendation forms, provided in application packet.
Unofficial transcripts from any colleges attended with credits student would like to transfer. Official transcripts will be requested upon acceptance into the program.
Alternate general education courses previously completed from an accredited college may be accepted to meet the General Education requirements through the transcript evaluation process. Please contact the Program Manager for more details.
MATH 146, or equivalent course, with minimum grade of 2.0 or higher, is the prerequisite for Applied Research Methods and Informational Literacy (CYFS 420).
To view additional information and download application materials please go to the BAS in Child, Youth, and Family Studies website.
The advisors for this program are:Teresa Lin, BAS-CYFS Program Manager | email@example.com | 425.640.1605Bárbara Martínez-Griego, CYFS Instructor | firstname.lastname@example.com | 425.640.1508
Department website:Child, Youth, and Family Studies | edcc.edu/cyfs
BAS Degree General Description The Bachelor of Applied Science (BAS) degree is a 180 credit baccalaureate degree, specifically designed to build on professional-technical associate degrees that provide workplace skills, such as Associate of Applied Science-Transfer (AAS-T) degrees. BAS degrees include a professional core of courses from the AAS-T degree, general education credits and upper division courses. BAS degrees are a pathway to the baccalaureate level with upper-division coursework in an applied field that provide expanded career opportunities for graduates and meet the needs of employers in the community. BAS degrees incorporate more applied, hands-on learning than a traditional bachelor's degree and allow a student to advance their skills and abilities without requiring the student to follow the traditional direct transfer degree pathway. Graduates with a BAS degree may apply to related master's degree programs. See a program advisor for details.
Program of Study Outcomes Edmonds CC's four General Education Outcomes (Communicate, Act Responsibly, Reason, and Explore) are promoted throughout the college's programs. Instructional programs of 45 credits or more foster learning in all four General Education Outcomes.
Student achievement is assessed in the general and program specific outcomes via the courses and course objectives that align with those outcomes. More information about program outcomes and course objectives can be found on the Using Program Requirement Sheets page.
Credit/Grade Requirements A minimum of 60 credits or one-third of the required college-level (100-level or above) credits, whichever is less, must be earned at Edmonds CC. Students are required to maintain a minimum cumulative grade point average of 2.0 in all college-level courses.
Students Are Advised To:
Graduation Application A completed Graduation Application form must be submitted online by the 10th day of the quarter in which the student expects to graduate. Note: Applications for summer quarter are due by the 8th day of the quarter.
Common Course Numbering Please refer to www.edcc.edu/ccn for more information.
Cultural Diversity Requirement All students earning a degree or certificate of 45 credits or more must meet a cultural diversity (CD) requirement by taking at least five (5) credits of CD courses. To learn more, go to Academic Information – Cultural Diversity Requirement in the online academic catalog.
College Resources
EPC - 42BTC - 180CIP - 440702Last Revision - 2018/03/06


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Happy birthday to
Troy Vance: Fuel defenseman in 2016-17. He had a goal and an assist in 15 games after being claimed from Cincinnati. A fifth-round pick of the Dallas Stars in 2011, Vance has played three full pro seasons since 2014, playing for Elmira, Idaho, Missouri, Cincinnati and Indy in the ECHL, as well as a team in Finland. A native of Goshen, N.Y., he is 24.


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Discrete Dynamics in Nature and Society
Volume 2006, Article ID 84697, 5 pages
A note on discrete-time dynamical systems under periodic perturbation
Department of Mathematics, Huazhong University of Science and Technology, Wuhan 430074, China
Received 11 December 2005; Accepted 27 February 2006
Copyright © 2006 Huimin Li and Xiaosong Yang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We present some results on the existence and the minimum period of periodic orbits for discrete-time dynamical systems under periodic perturbation. Some examples are presented to illustrate these results.


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