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Compressed sensing approximation of high-dimensional functions via convex and nonconvex regularizations
|
https://av.tib.eu/media/59149
| null |
https://tib.flowcenter.de/mfc/medialink/3/de50e8c4108c99bc3687dec95c5cdd39a5d0adcf8ef280d7d0cc4b7c5e1c2addf41e/201804231547-Tran_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59149 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Webster, Clayton G.
|
N. N. (Moderation)
Adcock, B.
Brugiapaglia, S.
Chkifa, A.
Dexter, N.
Tran, H.
|
Asymptotics of objective functionals in semi-supervised learning
|
https://av.tib.eu/media/59150
| null |
https://tib.flowcenter.de/mfc/medialink/3/decb343c10a82206109677631868830f9386f65b56d1f20873f359cab40e4c2c46/201804241114-Slepcev_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59150 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Slepčev, Dejan
| null |
Manifold learning by sparse grid methods
|
https://av.tib.eu/media/59151
| null |
https://tib.flowcenter.de/mfc/medialink/3/de4e6c6b349547915d16648565de26293fefa35e5b1f75a006574084099ce490f1/201804241333-Griebel_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59151 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Griebel, Michael
|
Bohn, Bastian
|
The Multivariate Decomposition Method
|
https://av.tib.eu/media/59152
| null |
https://tib.flowcenter.de/mfc/medialink/3/de8b6790e37f804955a7aa24d271876a994beee369ec6237119909e81f01bbb9cc/201804241459-Nuyens_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59152 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Nuyens, Dirk
|
Gilbert, Alec
Kuo, Frances
Nguyen, Dong
Plaskota, Leszek
Sloan, Ian
Wasilkowski, Greg
|
Greedy approximation selection with data assimilation
|
https://av.tib.eu/media/59153
| null |
https://tib.flowcenter.de/mfc/medialink/3/de139f93bee60a1f14769acf923d686932a58f8eeb43af9e8fec8ae573b8e9496d/201804241548-Nichols_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59153 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Nichols, James Ashton
|
N. N. (Moderation)
Cohen, Albert
Mula, Olga
Binev, Peter
|
Learning Regularisers: from Shallow to Deep Regularisers in Variational Models
|
https://av.tib.eu/media/59154
| null |
https://tib.flowcenter.de/mfc/medialink/3/de84e483d6e6623c3cdaf62f4d5df1add73d8ab224685a0b84dedaa4bfd85f0908/201804250902-Schonlieb_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59154 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Schönlieb, Carola-Bibiane
|
N. N. (Moderation)
|
Topological Dimensionality Reduction
|
https://av.tib.eu/media/59155
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb0637fd3edc6b1eb1d9ea8a17cdd0a4cdcfbe94124f03b25ed1780d1565b298e/201804261032-Perea_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59155 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Perea, Jose
| null |
Sparse Appoximation for Nonlinear Dynamics and Stationary Processes
|
https://av.tib.eu/media/59156
| null |
https://tib.flowcenter.de/mfc/medialink/3/de071093fc93252e546a103bba1b3eddebac3b0c8fa61b2e55042d9386fc57bf4b/201804261118-Tran_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59156 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Tran, Giang
|
N. N. (Moderation)
Tung Ho, Lam Si
Schaeffer, Hayden
Ward, Rachel
|
A Game Theoretic Approach to Numerical Approximation and Algorithm Design
|
https://av.tib.eu/media/59157
| null |
https://tib.flowcenter.de/mfc/medialink/3/de2fdb8eabb13c50aa91cac456170fa98e1345baa5c2dab24a904e31e09ac13231/201804261333-Owhadi_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59157 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Owhadi, Houman
|
N. N. (Moderation)
Schäfer, Florian
Scovel, Clint
Sullivan, Tim
Lei, Zhang
|
Joint Sparse Recovery Through Manifold Optimization
|
https://av.tib.eu/media/59158
| null |
https://tib.flowcenter.de/mfc/medialink/3/de79b4bdb37c593a45cb67a6675824abdf6a384b6226880937df378e3354be1b1a/201804261541-Petrosyan_lrv.mp4
|
2018
|
Mathematics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59158 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Petrosyan, Armenak
|
N. N. (Moderation)
Tran, Hoang
Webster, Clayton
|
Mining Media Data
|
https://av.tib.eu/media/13748
| null |
https://tib.flowcenter.de/mfc/medialink/3/de4659a9af272ed86aa657eb80d621aa3dfe8fef951119eede91c663382548dcdd/MOOD_Summer_School_6_Mathieu_Roche_Mehtab_Alam_Syed_Nejat_Arini.mp4
|
2022
|
Computer Science
|
Conference/Talk
|
In this tutorial, Mathieu Roche (Cirad, France) Nejat Arinik (INRAE, France) and Mehtab Alam Syed (Cirad, France) first presented an overview of NLP (Natural Language Processing) approaches in order to mine media data for EBS systems. The second part focus on textual classification issues based on data science approaches. Finally, original representations of results are presented for highlighting new knowledge for EBS systems.
|
English
|
10.5446/13748 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Roche, Mathieu
Arinik, Nejat
Syed, Mehtab Alam
| null |
How to build a dashboard to visualize covariate metadata collected from the literature
|
https://av.tib.eu/media/13750
| null |
https://tib.flowcenter.de/mfc/medialink/3/de0323f174f027f98c643884ffa8d1516feaad24d1742202d7ef6042983ce25580/MOOD_Summer_School_4_Francesca_Dagostin.mp4
|
2022
|
Computer Science
|
Conference/Talk
|
This lecture, Francesca Dagostin (Fondazione Edmund Mach, Italy) gave an overview of how to extract relevant information from published literature, with a special focus on metadata related to covariates affecting disease emergence. Since data retrieved from literature are often complex and tricky to explore, the practical session showed the participants how to organize them into relational tables in order to build customizable and ready-to-share dashboards, which allow to efficiently visualize and summarize the information collected.
|
English
|
10.5446/13750 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Dagostin, Francesca
| null |
Reproducible research in R
|
https://av.tib.eu/media/13751
| null |
https://tib.flowcenter.de/mfc/medialink/3/de296b3342a304c2c11dc961822d7732d23e62896d9572388680f1ff1bbaf48dba/MOOD_Summer_School_3_Facundo_Mu__oz.mp4
|
2022
|
Computer Science
|
Conference/Talk
|
In this session, Facundo Muñoz (Cirad, France) describex tools and workflows to cumulatively improve the reproducibility of analyses performed in R. R is a mature, world-class, open-source statistical computing and data-analysis platform with a huge community of users from all areas of science and industry. Yet, most researchers rely only on its most basic scripting features, missing the opportunity to unleash its full potential, in particular concerning reproducible-research workflows. Specifically, we discuss encoding and platform-specific packages, the advantages of organising code into functions, using project-directories and relative paths, reproducible reports with RMarkdown, controlling package versions with Renv, organising code into a pipeline with targets, keeping track of changes from various collaborators with git, reproducibly publishing results with Continuous Integration in Git(Hu|La)b pages, reproducing the complete environment with docker, and controlling versions of the complete software stack with GNU Guix.
|
English
|
10.5446/13751 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Muñoz, Facundo
| null |
Basics of surveillance and epidemic intelligence activities: an overview and the example of TBE
|
https://av.tib.eu/media/13752
| null |
https://tib.flowcenter.de/mfc/medialink/3/de5bf76d2dc03cd068780d05f2bbea77f7d041e696c66fba5936b62b176b242075/MOOD_Summer_School_2_Timoth__e_Dub_Henna_M__kel__.mp4
|
2022
|
Medicine
|
Conference/Talk
|
In this video tutorial, Timothee Dub and Henna Mäkelä (Finnish Institute for Health and Welfare, Finland ) discussed the basics of infectious disease surveillance (event-based and indicator-based surveillance, active versus passive surveillance), as well as the advantages and limitations of each type of systems, followed by the example of how surveillance activities for TBE are conducted in Finland. By the end of this lecture, participants should be aware of the limitations and quality issues that can occur when using surveillance data for comparison and/or modelling.
|
English
|
10.5446/13752 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Dub, Timothee
Mäkelä, Henna
| null |
The L2 exponential map in 2D and 3D hydrodynamics
|
https://av.tib.eu/media/59224
| null |
https://tib.flowcenter.de/mfc/medialink/3/de16c97a7636cd1681a381800a1e64ddbbfb44ec53f120abc00f7f6e9c2e13145d/201812100945-Misiolek_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In the 1960's V. Arnold showed how solutions of the incompressible Euler equations can be viewed as geodesics on the group of diffeomorphisms of the fluid domain equipped with a metric given by fluid's kinetic energy. The study of the exponential map of this metric is of particular interest and I will describe recent results concerning its properties as well as some necessary background.
|
English
|
10.5446/59224 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Misiolek, Gerard
| null |
Beyond Arnold’s geodesic framework of an ideal hydrodynamics
|
https://av.tib.eu/media/59223
| null |
https://tib.flowcenter.de/mfc/medialink/3/de750e515046390b07259304bf5278fac8db3f173725c0daa1bbbc09c82740a784/201812100905-Khesin_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We discuss a ramification of Arnold’s group-theoretic approach to ideal hydrodynamics as the geodesic flow for a right-invariant metric on the group of volume-preserving diffeomorphisms. We show such problems of mathematical physics as the motion of vortex sheets or fluids with moving boundary, have Lie groupoid, rather than Lie group, symmetries, and describe the corresponding geometry and equations. (This is a joint work with Anton Izosimov.)
|
English
|
10.5446/59223 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Khesin, Boris
| null |
Semi-invariant metrics on groups of diffeomorphisms
|
https://av.tib.eu/media/59225
| null |
https://tib.flowcenter.de/mfc/medialink/3/de167dba9f82402ee3065c5cfd65f64dfe4fef87e75c5c0675d5856ed88759d8012edb/201812101051-Modin_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We investigate a generalization of cubic splines to Riemannian manifolds. Spline curves are defined as minimizers of the spline energy-a combination of the Riemannian path energy and the time integral of the squared covariant derivative of the path velocity-under suitable interpolation conditions. A variational time discretization for the spline energy leads to a constrained optimization problem over discrete paths on the manifold. Existence of continuous and discrete spline curves is established using the direct method in the calculus of variations. Furthermore, the convergence of discrete spline paths to a continuous spline curve follows from the Γ-convergence of the discrete to the continuous spline energy. Finally, selected example settings are discussed, including splines on embedded finite-dimensional manifolds, on a high-dimensional manifold of discrete shells with applications in surface processing, and on the infinite-dimensional shape manifold of viscous rods.
|
English
|
10.5446/59225 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Modin, Klas
| null |
On some relations between Optimal Transport and Stochastic Geometric Mechanics
|
https://av.tib.eu/media/59226
| null |
https://tib.flowcenter.de/mfc/medialink/3/deeae8ac582b67fc6960059b61e38af7c4abc415d1d2e6512ebc5563a23a0ac0c3/201812101421-Cruzeiro_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We formulate the so-called Schrodinger problem in Optimal Transport on lie group and derive the corresponding Euler-Poincaré equations.
|
English
|
10.5446/59226 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Cruzeiro, Ana Bela
| null |
Gradient flows, interpolations and large deviations
|
https://av.tib.eu/media/59227
| null |
https://tib.flowcenter.de/mfc/medialink/3/dec91a2f957a05992d7656fd50520c8f598cdf8ff49d7c99cd7109f32ea7742f35/201812101522-Leonard_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In several situations, the empirical measure of a large number of random particles evolving in a heat bath is an approximation of the solution of a dissipative PDE. The evaluation of the probabilities of large deviations of this empirical measure suggests a way of defining a natural ``large deviation cost'' for these fluctuations, very much in the spirit of optimal transport. Some standard Wasserstein gradient flow evolutions are revisited in this perspective, both in terms of heuristic results and a few rigorous ones. This talk gathers several joint works with Julio Backhoff, Giovanni Conforti, Ivan Gentil, Luigia Ripani and Johannes Zimmer.
|
English
|
10.5446/59227 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Léonard, Christian
| null |
A particle Gibbs sampler for Feynman-Kac measures Stability and propagation of chaos
|
https://av.tib.eu/media/59228
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6a19cb3f6b43bc127d2b72546533904c47e9947d5786ee01a7f75814f3c2445b/201812101600-Arnaudon_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
"Continuous time Feynman-Kac measures on path spaces are central in applied probability, partial differential equation theory, as well as in quantum physics. I will present a new duality formula between normalized Feynman-Kac distribution and their mean field particle interpretations. Among others, this formula will allow to design a reversible particle Gibbs-Glauber sampler for continuous time Feynman-Kac integration on path spaces. This result extends the particle Gibbs samplers introduced by Andrieu-Doucet-Holenstein in the context of discrete generation models to continuous time Feynman-Kac models and their interacting jump particle interpretations. I will also provide new propagation of chaos estimates for continuous time genealogical tree based particle models with respect to the time horizon and the size of the systems. These results allow to obtain sharp quantitative estimates of the convergence rate to equilibrium of particle Gibbs-Glauber samplers."
|
English
|
10.5446/59228 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Arnaudon, Marc
| null |
Geometric modelling of uncertainties
|
https://av.tib.eu/media/59229
| null |
https://tib.flowcenter.de/mfc/medialink/3/de17257832792c75fbb2f6ae78ce76e2c5cef87b493f5c5c97731d64766121c743cb/201812101645-Arnaudon_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In mechanics, and in particular in shape analysis, taking into account the underlying geometric properties of a problem to model it is often crucial to understand and solve it. This approach has mostly been applied for isolated systems, or for systems interacting with a well-defined, deterministic environment. In this talk, I want to discuss how to go beyond this deterministic description of isolated systems to include random interactions with an environment, while retaining as much as possible the geometric properties of the isolated systems. I will discuss examples from geometric mechanics to shape analysis, ranging from interacting rigid bodies with a heath bath to uncertainties quantification in computational anatomy.
|
English
|
10.5446/59229 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Arnaudon, Alexis
| null |
Semi-discrete unbalanced optimal transport and quantization
|
https://av.tib.eu/media/59230
| null |
https://tib.flowcenter.de/mfc/medialink/3/de2a364f17a1ac420230d24ba3a00fc4f260e4c1fd1399c51d0dd2c188b924269f/201812110905-Schmitzer_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
"Semi-discrete optimal transport between a discrete source and a continuous target has intriguing geometric properties and applications in modelling and numerical methods. Unbalanced transport, which allows the comparison of measures with unequal mass, has recently been studied in great detail by various authors. In this talk we consider the combination of both concepts. The tessellation structure of semi-discrete transport survives and there is an interplay between the length scales of the discrete source and unbalanced transport which leads to qualitatively new regimes in the crystallization limit."
|
English
|
10.5446/59230 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Schmitzer, Bernhard
|
Bourne, David
Wirth, Benedikt
|
Wasserstein for learning image regularisers
|
https://av.tib.eu/media/59231
| null |
https://tib.flowcenter.de/mfc/medialink/3/de1276d1db85330cea0e6b961ecff17f42899c0be2f4a24a6eaae71ae42c364214/201812110942-Schonlieb_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In this talk we will discuss the use of a Wasserstein loss function for learning regularisers in an adversarial manner. This talk is based on joint work with Sebastian Lunz and Ozan Öktem.
|
English
|
10.5446/59231 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Schönlieb, Carola-Bibiane
| null |
Interpolation of Gaussian mixture models, and other directions in OMT
|
https://av.tib.eu/media/59232
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6075a95d446193316037272b46be093e6e7f91a76167bc39a12d05239eb85be6/201812111052-Georgiou_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59232 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Georgiou, Tryphon T.
| null |
Normal coordinates and equivolumic layers estimation in the cortex (tentative)
|
https://av.tib.eu/media/59233
| null |
https://tib.flowcenter.de/mfc/medialink/3/de2d40a37dffa136ccdd9a32e19953ef95b83601c3976140435b65ce147cf15299/201812111135-Younes_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59233 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Younes, Laurent
| null |
Analyze shape variability via deformations
|
https://av.tib.eu/media/59234
| null |
https://tib.flowcenter.de/mfc/medialink/3/de4a5d3f70233d356637fea2ada79d639c6559a8218e7f61d904643dd70cfdf2cc/201812111630-Gris_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
I will present how shape registration via constrained deformations can help understanding the variability within a population of shapes.
|
English
|
10.5446/59234 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Gris, Barbara
| null |
Solar models for Euler-Arnold equations
|
https://av.tib.eu/media/59236
| null |
https://tib.flowcenter.de/mfc/medialink/3/de4cd2b3464a5e5b711291f95859ba05d15f8fa1f7194c3332309b55cc10055a9f/201812120903-Preston_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Many one-dimensional Euler-Arnold equations can be recast in the form of a central-force problem Γtt(t,x)=−F(t,x)Γ(t,x), where Γ is a vector in R2 and F is a nonlocal function possibly depending on Γ and Γt. Angular momentum of this system is precisely the conserved momentum for the Euler-Arnold equation. In particular this picture works for the Camassa-Holm equation, the Hunter-Saxton equation, and the Okamoto-Sakajo-Wunsch family of equations. In the solar model, breakdown comes from a particle hitting the origin in finite time, which is only possible with zero angular momentum. Results due to McKean (for Camassa-Holm), Lenells (for Hunter-Saxton), and Bauer-Kolev-Preston/Washabaugh (for the Wunsch equation) show that breakdown of smooth solutions occurs exactly when momentum changes from positive to negative. I will discuss some conjectures and numerical evidence for the generalization of this picture to other equations such as the μ-Camassa-Holm equation or the DeGregorio equation.
|
English
|
10.5446/59236 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Preston, Stephen
| null |
Smooth perturbations of the functional calculus and applications to Riemannian geometry on spaces of metrics
|
https://av.tib.eu/media/59237
| null |
https://tib.flowcenter.de/mfc/medialink/3/de331b09668cbe6c79cfc739c8f06231afe80c3eaef5ceee9d9cbd90e95469a19f/201812121102-Harms_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We show that the functional calculus, which maps operators A to functionals f(A), is holomorphic for a certain class of operators A and holomorphic functions f. Using this result we are able to prove that fractional Laplacians depend real analytically on the underlying Riemannian metric in suitable Sobolev topologies. As an application we obtain local well-posedness of the geodesic equation for fractional Sobolev metrics on the space of all Riemannian metrics. (Joint work with Martins Bruveris, Martin Bauer, and Peter W. Michor)
|
English
|
10.5446/59237 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Harms, Philipp
| null |
Metrics on Dynamic Graphs (and lower bounds via Zigzag Persistence)
|
https://av.tib.eu/media/59239
| null |
https://tib.flowcenter.de/mfc/medialink/3/dec422d77d1b398b1cc56eeed9de5812860ead43081446b4fba968f290a9eab1f0/201812130904-Memoli_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
When studying flocking/swarming behaviors in animals one is interested in quantifying and comparing the dynamics of the clustering induced by the coalescence and disbanding of groups of animals. In a similar vein, when attempting to classify motion capture data according to action one is confronted with having to match/compare shapes that evolve with time. Motivated by these applications, we study the question of suitably metrizing the collection of all dynamic metric spaces (DMSs). We construct a suitable metric on this collection and prove the stability of several natural invariants of DMSs under this metric. In particular, we prove that certain zigzag persistent homology invariants related to dynamic clustering are stable w.r.t. this distance. These lower bounds permit the efficient classification of dynamic shape data in applications. We will show computational experiments on dynamic data generated via distributed behavioral models.
|
English
|
10.5446/59239 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Mémoli, Facundo
|
Kim, Woojin
Smith, Zane
|
Robust shape matching with optimal transport
|
https://av.tib.eu/media/59241
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb44a6eaa884e1991b7c3ecb088ee5bf1712f20ac3dee65df91e206e3721d73c4/201812131400-Natale_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59241 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Feydy, Jean
| null |
Generalized H(div) geodesics and solutions of the Camassa-Holm equation
|
https://av.tib.eu/media/59242
| null |
https://tib.flowcenter.de/mfc/medialink/3/de9a5498bce2f7a0b264dfc5183384e01794eed5d7257c28dcde570acd4e5f3dae/201812131426-Feydy_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59242 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Natale, Andrea
| null |
Quantization on a Riemannian manifold with application to air traffic control
|
https://av.tib.eu/media/59243
| null |
https://tib.flowcenter.de/mfc/medialink/3/dec3beb13a38351c60abef7f7385ff02b7660d0ab772415e6ed0ac2b825c5cfa2bd8/201812131449-LeBrigant_lrv.mp4
|
2018
|
Computer Science
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
| null |
English
|
10.5446/59243 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Brigant, Alice Le
| null |
Possible pathways for protein knot folding
|
https://av.tib.eu/media/58151
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb13b0d23df58d0ffdbd3a01f68e573159c73196f485de3428277f31ca84e9e5c5c/201903281412-Flapan_lrv.mp4
|
2019
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
From 7:08 min there is audio interference. How knotted proteins fold has remained controversial since the identification of deeply knotted proteins nearly two decades ago. Both computational and experimental approaches have been used to investigate protein knot formation. In this talk, we introduce a new theory of knot folding that could describe a pathway for the formation of all currently known protein knot types and predict knot types that might be identified in the future. We analyze fingerprint data from crystal structures of protein knots as evidence that particular protein knots may fold according to specific configurations from our theory. In particular, our approach confirms Taylor's twisted hairpin theory of knot folding for the 31-knotted proteins and the 41-knotted KARI's as special cases, and presents an alternative folding mechanism for the 41-knotted phytochromes and the 52- and 61-knotted proteins.
|
English
|
10.5446/58151 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Flapan, Erica
|
He, Adam
Wong, Helen
|
Variations on the minimal resolution conjecture
|
https://av.tib.eu/media/59197
| null |
https://tib.flowcenter.de/mfc/medialink/3/def06fb645c512d439dc9152fda7b8cc57e1cf66a5e5bc3cb3acde0caa3976542e/201806251531-Boij_lrv.mp4
|
2018
|
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In ongoing joint work with Christine Berkesch and Daniel Erman we study the minimal resolution conjecture up to scaling. For Hilbert functions corresponding to modules of low regularity there always exist corresponding Betti tables with no consecutive cancellations up to scaling. For Hilbert functions of many naturally occurring modules, like coordinate rings of Veronese varieties, the Betti table can be semi-pure, even though the region of Hilbert functions corresponding to such tables is a tiny part of the cone of Hilbert functions.
|
English
|
10.5446/59197 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Boij, Mats
| null |
A-hypergeometric rank jumps from local cohomology in codimension 2
|
https://av.tib.eu/media/59198
| null |
https://tib.flowcenter.de/mfc/medialink/3/de744dc5fdfc78921c7665d19535af3f3c6effa9444c860e4eddafdf03c3f09998/201806251646-Berkesch_lrv.mp4
|
2018
|
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We construct an explicit local duality map for codimension 2 toric ideals, thanks in part to the explicit free resolutions of Peeva--Sturmfels for such ideals. We then combine this with our work on the parametric behavior of the series solutions of an A-hypergeometric system to explain how local cohomology causes rank jumps.
|
English
|
10.5446/59198 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Berkesch, Christine
| null |
Cohomologically full rings
|
https://av.tib.eu/media/59199
| null |
https://tib.flowcenter.de/mfc/medialink/3/de1566494a3b5b91bcf1c672b5448b3f0b39c63fe5154f6004f21e8aee7f224bb9/201806251728-Dao_lrv.mp4
|
2018
|
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Inspired by a question raised by Eisenbud-Musta\c{t}\u{a}-Stillman regarding the injectivity of maps from Ext modules to local cohomology modules, we introduce a class of rings which we call cohomologically full rings. In positive characteristic, this notion coincides with that of F-full rings studied by Pham and Ma, while in characteristic 0, they include Du Bois singularities. We prove many basic properties of cohomologically full rings, including their behavior under flat base change. We show that ideals defining these rings satisfy many desirable properties, in particular they have small cohomological and projective dimension. Furthermore, we obtain Kodaira-type vanishing and strong bounds on the regularity of cohomologically full graded algebras. Joint work with Alessandro De Stefani and Linquan Ma.
|
English
|
10.5446/59199 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Dao, Hailong
| null |
Residual Intersections: Socles and Duality
|
https://av.tib.eu/media/59200
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb790382c696a8b355c5cbbf72478357b4a652296a92495a872ebf53bf2a93ed9a7/201806260901-Ulrich_lrv.mp4
| null | null | null | null | null | null | null | null | null |
Big polynomial rings and Stillman's conjecture
|
https://av.tib.eu/media/59202
| null |
https://tib.flowcenter.de/mfc/medialink/3/de5e138362ade24c35412329c3f66449e77ae646487272fc81af1dd2f7d9eca6a6/201806261402-Sam_lrv.mp4
| null | null | null | null | null | null | null | null | null |
Maximal syzygies in Hilbert schemes of monomial complete intersections
|
https://av.tib.eu/media/59204
| null |
https://tib.flowcenter.de/mfc/medialink/3/de0dc282b8e17e45d56c0aa382cef968be76b6a07462200e02666c014dfcc098da/201806261645-Sammartano_lrv.mp4
| null | null | null | null | null | null | null | null | null |
An unexpected property of some residual intersections
|
https://av.tib.eu/media/59206
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb92da66b433b5740e019de5f5e77bd15bc7a133fd7c28f4d6f2c7d3fd49e07d0/201806270902-Eisenbud_lrv.mp4
| null | null | null | null | null | null | null | null | null |
A generalization of Macaulay’s correspondence for Gorenstein k-algebras and applications
|
https://av.tib.eu/media/59207
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb68cf9165a7da433655c5c633f3a790e9a105d50bd6d1fb31b49134db714c00d6d/201806271032-Rossi_lrv.mp4
| null | null | null | null | null | null | null | null | null |
Non-Koszul Quadratic Gorenstein rings via Idealization
|
https://av.tib.eu/media/59210
| null |
https://tib.flowcenter.de/mfc/medialink/3/def2975abfef4de5c67f034e0d501fb5939c8dfd61f90635c897ff31b63a38bf13/201806281530-Schenck_lrv.mp4
|
2018
|
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Let R be a standard graded Gorenstein algebra over a field presented by quadrics. Conca-Rossi-Valla showed that such a ring is Koszul if reg (R)<= 2 or if reg(R)= 3 and codim(R)<= 4, and asked if this is true for reg(R)= 3 in general. We give a negative answer to their question by finding suitable conditions on a non-Koszul quadratic Cohen-Macaulay ring R that guarantee the Nagata idealization of R with the (twisted) canonical module is a non-Koszul quadratic Gorenstein ring.
|
English
|
10.5446/59210 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Schenck, Hal
| null |
Graded Betti numbers of balanced simplicial complexes
|
https://av.tib.eu/media/59211
| null |
https://tib.flowcenter.de/mfc/medialink/3/de1cefb318f218823106107f75533a2239689ab3d3bdf7e6ef4871dbe78a247486/201806281645-JuhnkeKubitzke_lrv.mp4
|
2018
|
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
A (d−1)-dimensional simplicial complex is called balanced, if its 1-skeleton is d-colorable. In this talk, I will discuss upper bounds for the graded Betti numbers of the Stanley-Reisner rings of this class of simplicial complexes. Our results include both, bounds for the Cohen-Macaulay case and for the general situation. Previously, upper bounds have been shown by Migliore and Nagel, and Murai for simplicial polytopes, Cohen-Macaulay complexes and normal pseudomanifolds. If time permits, I will also mention, what can be said for balanced normal pseudomanifolds. This is joint work with Lorenzo Venturello.
|
English
|
10.5446/59211 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Juhnke-Kubitzke, Martina
| null |
Fluorinated organic azides: From chemical curiosities to versatile building blocks
|
https://av.tib.eu/media/59222
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb114b06bc776595212d3adf817b432d096e8f615b3251d228088ce6a3fbe406b/Beier_Fluorinated_Organic_Azides.mp4
|
2022
|
Chemistry
|
Webinar/Tutorial
|
Organic azides are widely used and versatile building blocks. Their fluorinated derivatives however have been very rare and their stability and reactivity has not been studied. In recent years we have described the synthesis of a library of new organic fluorinated azides from azidotrifluoromethane to more complex ones, demonstrated their superior stability compared to nonfluorinated azides and studied their unique reactivity in cycloadditions, annulations, protonation, or nitrene formation. Thus, fluorinated azides are no longer chemical curiosities but useful reagents in the synthesis of novel nitrogen heterocycles, enamides, imidoyl halides, ketenimines, and other structures with potential applications in life science and material chemistry.
|
English
|
10.5446/59222 (DOI)
|
CC Attribution 4.0 International:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Beier, Petr
|
Beier, Petr
|
Wasserstein estimates and macroscopic limits in a model from ecology
|
https://av.tib.eu/media/59160
| null |
https://tib.flowcenter.de/mfc/medialink/3/de0f57e99646ca6cd71eb06fcf4aa80e4402f192144c4e8811e7e553cbe2954abe/201804090937-Raoul_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We are interested in evolutionary biology models for sexual populations. The sexual reproductions are modelled through the so-called Infinitesimal Model, which is similar to an inelastic Boltzmann operator. This kinetic operator is then combined to selection and spatial dispersion operators. In this talk, we will show how the Wasserstein estimates that appear naturally for the kinetic operator can be combined to estimates on the other operators to study the qualitative properties of the solutions. In particular, this approach allows us to recover a well-known (in populations genetics) macroscopic model.
|
English
|
10.5446/59160 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Raoul, Gaël
| null |
A new continuum theory for incompressible swelling materials
|
https://av.tib.eu/media/59161
| null |
https://tib.flowcenter.de/mfc/medialink/3/de3d5b7f96fb09b34a65d93c0ba6191f1f77ef3b6fa68c4f384ff36d31cf4fd8af/201804091032-Degond_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Swelling media (e.g. gels, tumors) are usually described by mechanical constitutive laws (e.g. Hooke or Darcy laws). However, constitutive relations of real swelling media are not well-known. Here, we take an opposite route and consider a simple heuristics relying on the following rule: (i) particles are at packing density; (ii) any two particles cannot swap their position; (iii) motion should be as slow as possible. These heuristics determine the medium velocity uniquely. In general, this velocity cannot be retrieved by a simple Darcy law.
|
English
|
10.5446/59161 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Degond, Pierre
|
Ferreira, Marina
Merino Aceituno, Sara
Nahon, Mickaël
|
Rigorous derivation of the nonlocal reaction-diffusion FitzHugh-Nagumo system
|
https://av.tib.eu/media/59162
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6e75013ca0e94aab35080b8efedf782467639192b044f8ee3edd10b206910276/201804091107-Filbet_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We introduce a spatially extended transport kinetic FitzHugh-Nagumo model with forced local interactions and prove that its hydrodynamic limit converges towards the classical nonlocal reaction-diffusion FitzHugh-Nagumo system. Our approach is based on a relative entropy method, where the macroscopic quantities of the kinetic model are compared with the solution to the nonlocal reaction-diffusion system. This approach allows to make the rigourous link between kinetic and reaction-diffusion models.
|
English
|
10.5446/59162 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Filbet, Francis
|
Crevat, Joachim
Faye, Gregory
|
Enhancement of biological reaction by chemotaxis
|
https://av.tib.eu/media/59163
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6b89eaeafc25451c11c51d134cf61d697632636678827054fc8674176fde6dfa/201804091529-Yao_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In this talk, we consider a system of equations arising from reproduction processes in biology, where two densities evolve under diffusion, absorbing reaction and chemotaxis. We prove that chemotaxis plays a crucial role to ensure the efficiency of reaction: Namely, the reaction between the two densities is very slow in the pure diffusion case, while adding a chemotaxis term greatly enhances reaction. While proving our main results we also obtain a weighted Poincare's inequality for the Fokker-Planck equation, which might be of independent interest.
|
English
|
10.5446/59163 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Yao, Yao
|
Kiselev, A.
Nazarov, F.
Ryzhik, L.
|
Entropic regularization of optimal transport and applications
|
https://av.tib.eu/media/59165
| null |
https://tib.flowcenter.de/mfc/medialink/3/de18e9eae6bb3048d89a5f2e828c931203557491d9fd0a0458e376e63336fe03ae/201804100851-Carlier_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Entropic regularization of optimal transport is appealing both from a numerical and theoretical perspective. In this talk we will discuss two applications, one from incompressible fluid dynamics and the other from mean-field games theory.
|
English
|
10.5446/59165 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Carlier, Guillaume
| null |
Entropic concavity and positive energy
|
https://av.tib.eu/media/59166
| null |
https://tib.flowcenter.de/mfc/medialink/3/de55a45c306b986bbb7cedc8665e2a8f768d9ea11afcfd1a87ecfab7509ebc3453ea/201804100921-McCann_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
On a Riemannian manifold, lower Ricci curvature bounds are known to be characterized by geodesic convexity properties of various entropies with respect to the Kantorovich-Rubinstein-Wasserstein square distance from optimal transportation. These notions also make sense in a (nonsmooth) metric measure setting, where they have found powerful applications. In this talk I describe the development of an analogous theory for lower Ricci curvature bounds in time-like directions on a Lorentzian manifold. In particular, by lifting fractional powers of the Lorentz distance (a.k.a. time separation function) to probability measures on spacetime, I show the strong energy condition of Penrose is equivalent to geodesic concavity of the Boltzmann-Shannon entropy there.
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English
|
10.5446/59166 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
McCann, Robert
| null |
A partial Laplacian as an infinitesimal generator on the Wasserstein space
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https://av.tib.eu/media/59167
| null |
https://tib.flowcenter.de/mfc/medialink/3/defcf7b81b0b38a904f3e9a46277208fe29993fbc421e79a8b39526c7bd94767f0/201804101032-Gangbo_lrv.mp4
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2018
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Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
We study stochastic processes on the Wasserstein space, together with their infinitesimal generators. One of these processes plays a central role in our work. Its infinitesimal generator defines a partial Laplacian on the space of Borel probability measures, and we use it to define heat flow on the Wasserstein space. We verify a distinctive smoothing effect of this flow for a particular class of initial conditions. To this end, we will develop a theory of Fourier analysis and conic surfaces in metric spaces. We note that the use of the infinitesimal generators has been instrumental in proving various theorems for Mean Field Games, and we anticipate they will play a key role in future studies of viscosity solutions of PDEs in the Wasserstein space (Joint work with Y. T. Chow).
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English
|
10.5446/59167 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Gangbo, Wilfrid
| null |
From Monge Transport to Skorokhod Embeddings
|
https://av.tib.eu/media/59168
| null |
https://tib.flowcenter.de/mfc/medialink/3/ded42df38313a4582a1e098b5036c26cb841d7d4c204d2570dcec550389a811f9b/201804101120-Palmer_lrv.mp4
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2018
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Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
We explore a dynamic formulation of the optimal transportation problem with the additional freedom to choose the end-time of each trajectory. The dual problem is then posed with a Hamilton-Jacobi variational inequality, which we analyze with the method of viscosity solutions. We find properties that imply the optimal stopping-time is the hitting-time of the free boundary to the variational inequality.
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English
|
10.5446/59168 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Palmer, Aaron Zeff
|
Ghoussoub, N.
Kim, Y.H.
|
Long time behaviour of kinetic Langevin equation
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https://av.tib.eu/media/59170
| null |
https://tib.flowcenter.de/mfc/medialink/3/dedc257e386a1eb2d6a47bb6aa9fd46a13b1342ad9645ba7ef3784ba06a0c3bb98/201804101440-Guillin_lrv.mp4
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2018
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Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
We will present here two different approaches to study the long time behaviour of the kinetic Langevin equation : 1) hypocoercivity technique for entropic convergence via a new weighted logarithmic Sobolev inequality ; 2) Wasserstein convergence via a particular reflection coupling.
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English
|
10.5446/59170 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Guillin, Arnaud
| null |
Why in some cases the asymptotic linearized problem yields optimal results for a nonlinear version of the carré du champ
|
https://av.tib.eu/media/59171
| null |
https://tib.flowcenter.de/mfc/medialink/3/de4ebee66868b23e77a5c2c36bdd5fa104e730354bd2aece03f754d7045be783a7/201804101536-Esteban_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
Using a nonlinear parabolic flow, in this talk I will explain why the optimal regions of symmetry and symmetry breaking for the extremals of critical and subcritical Caffarelli-Kohn-Nirenberg inequalities are related to the spectral gap of the linearized problem around the asymptotic Barenblatt solutions. This is a surprising result since it means that a global test yields a global result. The use of the parabolic flow also allows to get improved inequalities with explicit remainder terms.
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English
|
10.5446/59171 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Esteban, Maria J.
|
Dolbeault, J.
Loss , Michael
Muratori, Matteo
|
Entropy production inequalities for the Kac Walk
|
https://av.tib.eu/media/59172
| null |
https://tib.flowcenter.de/mfc/medialink/3/de13adc1db1de957635fdef0845371aeb0a14c08d9d8571e4750b6b144c0756bd6/201804101627-Carvalho_lrv.mp4
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2018
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Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
We investigate new functional inequalities for the well-known Kac's Walk, and largely resolve the 'Almost' Cercignani Conjecture on the sphere. A new notion of chaoticity plays an essential role. The results we obtain validate Kac's suggestion that functional inequalities for the Kac walk could be used to quantify the rate of approach to equilibrium for the Kac-Boltzmann equation.
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English
|
10.5446/59172 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Carvalho, Maria C.
|
Carlen, E.
Einav, A.
|
Hypocoercivity in Phi-entropy for linear relaxation Boltzmann equation
|
https://av.tib.eu/media/59173
| null |
https://tib.flowcenter.de/mfc/medialink/3/dec2c4ddd4fc135ae4e45dd5f60887da8fa97d426822debecff442215e0c42c42e/201804101701-Evans_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
As well as results in Hilbert spaces, Villani's memoire on hypocoercivity contains convergence to equilibrium results measured in relative entropy. Since then hypocoercivity in more general Phi entropies has been studied by several authors. These works have mainly been for diffusion equations which can be put in a 'Hormander sum of squares form'. The linear relaxation Boltzmann equation is a simple equation not of this form for which hypocoercivity in Phi entropies can still be shown but with extra terms added to the functional which would not be needed for a diffusion.
|
English
|
10.5446/59173 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Evans, Josephine
|
Mouhot, Clement
|
Equilibration of renormalised solutions to nonlinear chemical reaction-diffusion systems
|
https://av.tib.eu/media/59174
| null |
https://tib.flowcenter.de/mfc/medialink/3/de2a5ae7f4bbbe62fa65d70e33b7ae25892ad1bede23a4d001b39d7790499333e3/201804110848-Fellner_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We prove exponential convergence to equilibrium for renormalised solutions to general complex balanced reaction-diffusion systems without boundary equilibria and even for systems with boundary equilibria provided a finite dimensional inequality holds along solutions trajectories. Our proofs are based on the entropy method and represent the most general results on the convergence to equilibrium for complex balanced RD systems currently available.
|
English
|
10.5446/59174 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Fellner, Klemens
|
Tang, Bao Quoc
Desvillettes, Laurent
|
Global estimates for local and nonlocal porous medium type equations on bounded domains
|
https://av.tib.eu/media/59175
| null |
https://tib.flowcenter.de/mfc/medialink/3/de3081ddb28da35d875576b70dacec093e78385d7b33f4957ecfa2d3bc74a1cb33/201804110929-Figalli_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
The behavior of solutions to the classical porous medium equation is by now well understood: the support of the solution expands at finite speed, and for large times it behaves as the separate-variable solution. When the Laplacian is replaced by a nonlocal diffusion, completely new and surprising phenomena arise depending on the power of the nonlinearity and the one of the diffusion. The aim of the talk is to give an overview of this theory.
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English
|
10.5446/59175 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Figalli, Alessio
| null |
Asymptotical analysis of a weighted very fast diffusion equation arising in quantization of measures via the JKO scheme
|
https://av.tib.eu/media/59177
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6576c35c5c7b86c13ae09907ba8a3e25a590df37412788f256078a62fb0ea2c02b/201804111112-Iacobelli_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In this talk I would like to present some recent results on the asymptotic behavior of a very fast diffusion PDE with periodic boundary conditions. This equation is motivated by the gradient flow approach to the problem of quantization of measures. I prove exponential convergence to equilibrium under minimal assumptions on the data, and I also provide sufficient conditions for W2-stability of solutions. Moreover, I will present a work in progress with Filippo Santambrogio and Francesco Saverio Patacchini where we use the JKO scheme to relax the hypotheses of my previous convergence result.
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English
|
10.5446/59177 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Iacobelli, Mikaela
| null |
A BDF2-Approach for the Non-Linear Fokker-Planck Equation
|
https://av.tib.eu/media/59178
| null |
https://tib.flowcenter.de/mfc/medialink/3/de92fed032f080855340e20fb73e3b0dc3be15750ae6fd821302bbf60af0f86042/201804120848-Plazotta_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
In this talk I will discuss the construction of approximate solutions for the Non-linear Fokker-Planck equation. We utilize the L2-Wasserstein gradient flow structure of this PDEs to perform a semi discretization in time by means of the variational BDF2 method. Our approach can be considered as the natural second order analogue of the Minimizing Movement or JKO scheme. In comparison to our own recent work on constructing solutions to λ-contractive gradient flows in abstract metric spaces, the technique presented here exploits the differential structure of the underlying L2-Wasserstein space. We directly prove that the obtained limit curve is a weak solution of the non-linear Fokker-Planck equation without using the abstract theory of curves of maximal slope. Additionally, we provide strong Lm convergence instead of merely weak convergence in the L2-Wasserstein topology of the time-discrete approximations.
|
English
|
10.5446/59178 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Plazotta, Simon
| null |
Entropic optimal transport and nonlinear PDE's
|
https://av.tib.eu/media/59179
| null |
https://tib.flowcenter.de/mfc/medialink/3/de8bcf574611758fc2baff186d6ed9775e30e4c013e5bc8eacf7eade1bd3eae9ea/201804120919-Savare_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We discuss two examples of "dynamical optimal transport problems", whose formulations involve a relative entropy functional. The first case is related to the Hellinger-Kantorovich distance and induces an interesting geometric structure on the space of positive measures with finite (but possibly different) mass. In particular, contraction estimates of nonlinear flows are strongly related to geodesic convexity of the generating entropy functionals. In the second example an entropy functional penalizes the density of the connecting measures with respect to a given reference measure (typically the Lebesgue one) and leads to a first order "mean field planning" problem, which is classicaly formulated by a continuity equation and a Hamilton Jacobi equation with a nonlinear coupling. In this case, the variational approach and the displacement convexity of the entropy functionals (in the usual sense of optimal transport) provide crucial tools to give a precise meaning to the PDE system and to prove the existence of a solution.
|
English
|
10.5446/59179 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Savaré, Giuseppe
| null |
Gromov-Hausdorff convergence of discrete optimal transport
|
https://av.tib.eu/media/59180
| null |
https://tib.flowcenter.de/mfc/medialink/3/de73d22835f930e86495a2deb607169add41911eeb35443031a3db4cacf23b2548/201804121033-Maas_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
For a natural class of discretisations of a convex domain in Rn, we consider the dynamical optimal transport metric for probability measures on the discrete mesh. Although the associated discrete heat flow converges to the continuous heat flow, we show that the transport metric may fail to converge to the 2-Kantorovich metric. Under an additional symmetry condition on the mesh, we show that Gromov-Hausdorff convergence to the 2-Kantorovich metric holds. This is joint work with Peter Gladbach and Eva Kopfer.
|
English
|
10.5446/59180 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Maas, Jan
| null |
Gradient Flows in Abstract Metric Spaces: Evolution Variational Inequalities and Stability
|
https://av.tib.eu/media/59181
| null |
https://tib.flowcenter.de/mfc/medialink/3/de0a09ead4c6469d611f55566c539cd32f5d5c5c225f514698dfd2270fd19bb1de63/201804121108-Muratori_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We study the main consequences of the existence of a Gradient Flow (GF for short), in the form of Evolution Variational Inequalities (EVI), in the very general framework of an abstract metric space. In particular, no volume measure is needed. The hypotheses on the functional associated with the GF are also very mild: we shall require at most completeness of the sublevels (no compactness assumption is made) and, for some convergence and stability results, approximate λ-convexity. The main results include: quantitative regularization properties of the flow (in terms e.g. of slope estimates and energy identities), discrete-approximation estimates of a minimizing-movement scheme and a stability theorem for the GF under suitable gamma-convergence-type hypotheses on a sequence of functionals approaching the limit functional. Existence of the GF itself is a quite delicate issue which requires some concavity-type assumptions on the metric, and will be addressed in a future project.
|
English
|
10.5446/59181 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Muratori, Matteo
|
Savaré, Giuseppe
|
Deterministic particle approximations for transport models with nonlinear mobility
|
https://av.tib.eu/media/59182
| null |
https://tib.flowcenter.de/mfc/medialink/3/de14a6a4b815a781ee3724e7963d2e5c301bea0bea4b15fa99e0022f9a88af9a9977/201804121400-DiFrancesco_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Nonlinear convection and nonlocal aggregation equations are known to feature a "formal" gradient flow structure in presence of a "nonlinear mobility", in terms of the generalized Wasserstein distance "à la" Dolbeault-Nazaret-Savaré. Such a structure is inherited by the discrete Lagrangian approximations of those equations in a quite natural way in one space dimension, and this simple remark allows to formulate a discrete-to-continuum "many particle" approximation. I will describe some recent results in this direction, which include the discrete (deterministic) particle approximation for scalar conservation laws and (more recently) a large class of nonlocal aggregation equations as main examples.
|
English
|
10.5446/59182 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Francesco, Marco Di
|
Rosini, M. D.
Fagioli, Simone
Radici, Emanuela
|
Recent results on nonlinear aggregation-diffusion equations: radial symmetry and long time asymptotics
|
https://av.tib.eu/media/59183
| null |
https://tib.flowcenter.de/mfc/medialink/3/de0a5c5c2428c5192109da7ebca6d3b10eace92236969f9ad1d44e2e575b4b2094a9/201804121436-Volzone_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
One of the archetypical aggregation-diffusion models is the so-called classical parabolic-elliptic Patlak-Keller-Segel (PKS for short) model. This model was classically introduced as the simplest description for chemotatic bacteria movement in which linear diffusion tendency to spread fights the attraction due to the logarithmic kernel interaction in two dimensions. For this model there is a well-defined critical mass. In fact, here a clear dichotomy arises: if the total mass of the system is less than the critical mass, then the long time asymptotics are described by a self-similar solution, while for a mass larger than the critical one, there is finite time blow-up.
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English
|
10.5446/59183 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Volzone, Bruno
| null |
Existence of ground states for aggregation-diffusion equations
|
https://av.tib.eu/media/59184
| null |
https://tib.flowcenter.de/mfc/medialink/3/de0fa55f2e3ad2631bd99d5010ff64af09a75b4a49a49194fa430d6be7b24c51f4/201804121537-Patacchini_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We analyze free energy functionals for macroscopic models of multi-agent systems interacting via pairwise attractive forces and localized repulsion. The repulsion at the level of the continuous description is modeled by pressure-related terms in the functional making it energetically favorable to spread, while the attraction is modeled through nonlocal forces. We give conditions on general entropies and interaction potentials for which neither ground states nor local minimizers exist. We show that these results are sharp for homogeneous functionals with entropies leading to degenerate diffusions while they are not sharp for fast diffusions. The particular relevant case of linear diffusion is totally clarified giving a sharp condition on the interaction potential under which the corresponding free energy functional has ground states or not.
|
English
|
10.5446/59184 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Patacchini, Francesco
|
Carrillo, J. A.
Delgadino, M. G.
|
When Otto meets Newton and Schrödinger, an heuristic point of view
|
https://av.tib.eu/media/59185
| null |
https://tib.flowcenter.de/mfc/medialink/3/debe4c5f7d7adf702cd0ab7bac226eea34d6682ab18b4079afca4998e4c4b27583/201804121604-Gentil_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We propose a generalization of the Schr\"odinger problem by replacing the usual entropy with a functional F which approaches the Wasserstein distance along the gradient of F. From an heuristic point of view by using Otto calculus, we show that interpolations satisfy a Newton equation, extending the recent result of Giovani Conforti. Various inequalities as Evolutional-Variational-inequalities are also established from a heuristic point of view. As a rigorous result we prove a new and general contraction inequality for the usual Schr\"odinger problem under Ricci bound on a smooth and compact Riemannian manifold. This is a joint work with L. Ripani and C. L\'eonard.
|
English
|
10.5446/59185 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Gentil, Ivan
| null |
Stein kernels, optimal transport and the CLT
|
https://av.tib.eu/media/59186
| null |
https://tib.flowcenter.de/mfc/medialink/3/dedc64d6d2e9a1bcefbed994e407de6d3c67df169efc710a3b92d7c65312d06cba/201804121644-Fathi_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
Stein kernels are a way of measuring distance between probability measures, defined via integration by parts formulas. I will present a connection between these kernels and optimal transport. The main result is a way of deriving rates of convergence in the classical central limit theorem using regularity estimates for a variant of the Monge-Ampere PDE. As an application, we obtain new rates of convergence for the multi-dimensional CLT, with explicit dependence on the dimension.
|
English
|
10.5446/59186 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Fathi, Max
| null |
Super Ricci flows for weighted graphs and Markov chains
|
https://av.tib.eu/media/59187
| null |
https://tib.flowcenter.de/mfc/medialink/3/def1875e0ed2c671398863d341984c72d50bc149ec01a127ddefd7dcdf48aa94e9/201804130852-Erbar_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
I will present a discrete notion of super Ricci flow that applies to time dependent Markov chains or weighted graphs. This notion can be characterized equivalently in terms of a discrete time-dependent Bochner inequality, gradient estimates for the heat propagator on the evolving graph, contraction estimates in discrete transport distances, or dynamic convexity of the entropy. I will also discuss several examples.
|
English
|
10.5446/59187 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Erbar, Matthias
|
Kopfer, Eva
|
On a new proof of the Harris ergodic theorem and related subexponential convergence results
|
https://av.tib.eu/media/59188
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6322391357d44944906d3b0574a44d74e02e4ec86b7c3e41b6a4c5d8ba1654fd/201804130928-Canizo_lrv.mp4
|
2018
|
Life Sciences
Mathematics
Physics
|
Workshop/Interactive Format
Lecture
|
We revisit a result in probability known as the Harris theorem and give a simple proof which is well-suited for some applications in PDE. The proof is not far from the ideas of Hairer \& Mattingly (2011) but avoids the use of mass transport metrics and can be readily extended to cases where there is no spectral gap and exponential relaxation to equilibrium does not hold. We will also discuss some contexts where this result can be useful, particularly in a model for neuron populations structured by the elapsed time since the last discharge.
|
English
|
10.5446/59188 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Cañizo, José Alfredo
|
Mischler, Stéphane
Yoldas, Havva
Cao, Chu Qi
Evans, J.
|
Phase transitions for the McKean-Vlasov equation on the torus
|
https://av.tib.eu/media/59189
| null |
https://tib.flowcenter.de/mfc/medialink/3/de7612fb9ed471b46236862cef8cf0a190e7b7db1009a98c477cbd45f28a34137d/201804131031-Schlichting_lrv.mp4
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2018
|
Life Sciences
Mathematics
Physics
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Workshop/Interactive Format
Lecture
|
In the talk, the McKean-Vlasov equation on the flat torus is studied. The model is obtained as the mean field limit of a system of interacting diffusion processes enclosed in a periodic box. The system acts as a model for several real-world phenomena from statistical physics, opinion dynamics, collective behaviour, and stellar dynamics. This work provides a systematic approach to the qualitative and quantitative analysis of the McKean-Vlasov equation. We comment on the longtime behaviour and convergence to equilibrium, for which we introduce a notion of H-stability. The main part of the talk considers the stationary problem. We show that the system exhibits multiple equilibria which arise from the uniform state through continuous bifurcations, under certain assumptions on the interaction potential. Finally, criteria for the classification of continuous and discontinuous transitions of this system are provided. This classification is based on a fine analysis of the free energy. The results are illustrated by proving and extending results for a wide range of models, including the noisy Kuramoto model, Hegselmann-Krause model, and Keller-Segel model.
|
English
|
10.5446/59189 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Schlichting, André
|
Carrillo, José
Gvalani, Rishabh S.
Greg, Pavliotis
|
Data, AI and Health: how to manage a that cares for everyone
|
https://av.tib.eu/media/59195
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb9ca621a5fcfe32fc7f67a12785c5c0aff1cdb7fe685fb2581a180f3797d4539b0/MOOD_Science_webinar_Gemma_Galdon_Clavell_25July2022.mp4
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2022
|
Economics and Social Sciences
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Conference/Talk
|
Dr. Gemma Galdon-Clavell is a leading voice on technology ethics and algorithmic accountability.She is the founder and CEO of Eticas Consulting, where she is responsible for leading themanagement, strategic direction and execution of the Eticas vision (https://www.eticasconsulting.com/). One of the sectors where AI has been embed into rapidly specially in the past few years is Healthcare. The advantages that might come from this are enormous in terms of time managing and efficiency, so enormous that we are missing the point: caring. It is critical to apply ethics and oversight when handling individuals' data that is so crucial and impactful. During this session, we will go through the complexity behind this data and systems and the best practices to ensure success.
|
English
|
10.5446/59195 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Galdon Clavell, Gemma
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Galdon Clavell, Gemma
|
Beyond the Active Site: Structure-guided insights into substrate specificity and mechanism in bacterial glycoconjugate biosynthesis
|
https://av.tib.eu/media/58156
| null |
https://tib.flowcenter.de/mfc/medialink/3/de532c4e5c30f54f28654e92e898c69a1bee3343ddaa1601f2871db41aa30d7021af/Allen_Beyond_the_active_site.mp4
|
2022
|
Life Sciences
|
Webinar/Tutorial
|
Bacterial glycoconjugates, including N-linked glycoproteins, are a diverse group of macromolecules that provide mechanical stability to microorganisms in challenging environments and mediate interactions among bacteria and between bacterial pathogens and their hosts. These interactions are often critical to bacterial viability and virulence in humans. These intricate pathways for glycoconjugate biosynthesis draw, in early steps, on substrates found in the bacterial cytoplasm to ultimately afford products that are localized to the periplasm or cell surface. Despite their great structural diversity, many glycoconjugates are biosynthesized using a common biosynthetic strategy involving en bloc transfer of glycan to proteins, lipids, or other glycans. The glycan to be transferred is assembled on a polyprenol-linked carrier at the membrane interface. The pathways start with a “commitment to membrane” step catalyzed by a polyprenol phosphate-phosphoglycosyl transferase (PGT). This step is followed by sequential glycan-assembly steps mediated by glycosyl transferases (GTs), each acting on membrane-resident PrenPP-derivatives, to complete glycan assembly on the lipid-linked carrier. The goal of our studies is to uncover the determinants of specificity and mechanisms by which these enzymes catalyze their reactions on membrane-embedded and soluble substrates. Biochemical studies and the X-ray crystal structure of the PGT from Campylobacter concisus, PglC at 2.74 Å resolution, show that the monoPGTs include a reentrant membrane helix that penetrates only one leaflet of the bilayer, then re-emerges. Subsequent molecular dynamics (MD) simulations show the undecaprenol phosphate (UndP) carrier mirrors this occupancy of a single leaflet with frequent transitions between stretched, coiled, and unstructured conformations of the polyprenyl tail. These simulations also allow a first view of UndP binding to PglC, corroborated by bioinformatic and mutagenesis studies. Moreover, a loop closure motion of PglC in the MD simulation matches the motion inferred from X-ray crystallographic data, consistant with an induced-fit model. Sequence-similarity networks and phylogenetic analysis of the monotopic PGT superfamily uncovered extensive numbers of fusions with other pathway enzymes and provide evidence that the enzymes in glycoconjucate synthesis are structured to gather rare substrates. We have recently determined the X-ray crystal structure of the enzyme that carries out the next step in assembly, C. concisus PglA, in complex with the donor-sugar substrate UDP-GalNAc at 2.5 Å resolution. The structure of PglA has remarkable similarity to the GT PglH (rmsd 1.9 Å) which catalyzes the precessive addition of three GalNAc moieties in the penultimate assembly step of the pathway. Comparative analysis of membrane-docked structures highlights significant differences between PglA and PglH in the relative orientation of the active site with the membrane interface. We posit that acceptor-substrate positioning in the membrane may play an integral part in specificity in the GT enzymes. This work is funded by NIH R01GM131627.
|
English
|
10.5446/58156 (DOI)
|
CC Attribution 4.0 International:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Allen, Karen N.
| null |
On an Information Theoretic Approach to Cardinality Estimation
|
https://av.tib.eu/media/58130
| null |
https://tib.flowcenter.de/mfc/medialink/3/de9a207793ae370ec9d6a980c25f33cf24696d28e382c338aeb6e0d9484f78d415/Keynote_Hung_Ngo_-_On_an_Information_Theoretic_Approach_to_Cardinality_Estimation.mp4
|
2022
|
Computer Science
|
Conference/Talk
| null |
English
|
10.5446/58130 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Ngo, Hung Q.
| null |
Counting the Solutions to a Query
|
https://av.tib.eu/media/58128
| null |
https://tib.flowcenter.de/mfc/medialink/3/de18ec97b8229e13ffeeb46a345476c31e473154200281ce5a41966ed16c1a40d1/Keynote_Marcelo_Arenas_-_Counting_the_Solutions_to_a_Query.mp4
|
2022
|
Computer Science
|
Conference/Talk
| null |
English
|
10.5446/58128 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Arenas, Marcelo
| null |
Tutorial: Answering Unions of Conjunctive Queries with Ideal Time Guarantees
|
https://av.tib.eu/media/58129
| null |
https://tib.flowcenter.de/mfc/medialink/3/de5c304922dde4ec7f36316d60a9bd5b89a3d2bb49fafc6bc3e2fceae44ce2560de8/ICDT_Invited_Tutorial_Answering_Unions_of_Conjunctive_Queries_Ideal_Time_Guarantees.mp4
|
2022
|
Computer Science
|
Conference/Talk
| null |
English
|
10.5446/58129 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Carmeli, Nofar
| null |
ebooks licences/copyright, and the future of Open Access books as an alternative
|
https://av.tib.eu/media/58083
| null |
https://tib.flowcenter.de/mfc/medialink/3/de869bbf3d8f146f63e1bcbee537ec08331fbf0f30916631ef70ee5b4bc8d06cc5/01_Caroline_Ball.mp4
|
2022
|
Information Science
|
Conference/Talk
| null |
English
|
10.5446/58083 (DOI)
|
CC Attribution - NonCommercial - ShareAlike 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this
|
Ball, Caroline
Barnes, Lucy
|
Patrician, David (Moderation)
|
Poster presentation: Onboarding in a Hybrid Work Environment: Questions from a Library Administrator, Answers from a New Hire.
|
https://av.tib.eu/media/58069
| null |
https://tib.flowcenter.de/mfc/medialink/3/de622e9a2ea83b023e32bfca2b3a34764c13147f303588cdf90dca841aeab01eff/03_Scott_Richard_St_Louis.mp4
|
2022
|
Information Science
|
Conference/Talk
|
The COVID-19 pandemic is transforming organizational cultures across the workforce, with libraries of all kinds being no exception. This poster presentation will focus on the experience of a scholarly communication and discovery services librarian beginning a new job in the United States Federal Reserve System in May 2021, immediately after completing graduate school. The poster will be organized around answering key questions that participants in INCONECSS 2022 might have in mind with regard to onboarding new colleagues successfully, especially in libraries that have experienced major changes in day-to-day working life over the past two years. These key questions will include the following, in no particular order: What has worked well with remote onboarding as a new employee? Where is the in-person component of working life unmatched by remote work? How can a new employee ensure harmony between their own expectations/preferences and those of their colleagues and supervisor? How might the lack of daily spatial proximity to colleagues impact the informal knowledge sharing that orients a new employee to a library/office culture, including the explicit and implicit aspects of that culture? In that ways might new employees compensate for this deficit? In a remote working environment, how might a new employee go about building relationships with important “secondary contacts” in a library organization? (The people you need to know, but don’t necessarily need to see or interact with every day.)
|
English
|
10.5446/58069 (DOI)
| null |
St. Louis, Scott Richard
|
Patrician, David (Moderation)
|
INCONECSS 2022 - Opening of the conference
|
https://av.tib.eu/media/58070
| null |
https://tib.flowcenter.de/mfc/medialink/3/dee5d1148dba336dd4179568a9c9c45e55682d9a32a1378850ac8eb73c9890f7a3/01_Opening_of_the_conference_by_Thorsten_Meyer.mp4
|
2022
|
Information Science
|
Conference/Talk
| null |
English
|
10.5446/58070 (DOI)
| null |
Meyer, Thorsten
|
Patrician, David (Moderation)
|
Fed in Print: The Past, Present, and Future of Making Federal Reserve System Research Outputs Visible and Easily Searchable
|
https://av.tib.eu/media/58071
| null |
https://tib.flowcenter.de/mfc/medialink/3/de7642b08c4e0d3b6538e95e916315aa919ccba1e97fccfe9dc568bcbc30f39d4b/16_Scott_Richard_St._Louis.mp4
|
2022
|
Information Science
|
Conference/Talk
|
This presentation will focus on fedinprint.org, a web application that makes research outputs from across the United States Federal Reserve System – including twelve regional banks and the Board of Governors – searchable in one location by title, author, abstract, keyword, series, content type, bank, and Journal of Economic Learning (JEL) classification. Fed in Print also presents metadata about these research outputs to major discovery services including Google Scholar and Research Papers in Economics (RePEc). The presentation will focus on the history of Fed in Print, the System-wide cooperation required to successfully populate Fed in Print with timely, high-quality item metadata, and future plans for Fed in Print. Such future plans relate to API development, automation in content contribution, possible new RSS feeds, and keyword quality control. These future plans will necessitate an exploration on the poster of the agile software development processes used to articulate, refine, and prioritize forthcoming enhancements to Fed in Print, in balance with multiple other digital products maintained by the Research Division at the Federal Reserve Bank of St. Louis.
|
English
|
10.5446/58071 (DOI)
| null |
St. Louis, Scott Richard
|
Patrician, David (Moderation)
|
What about data literacy? Business librarians and the ACRL Framework for Information Literacy
|
https://av.tib.eu/media/58072
| null |
https://tib.flowcenter.de/mfc/medialink/3/de8b24c7b5eccebf4ecfb621c77bd03716259751b0622bdec6a6d7105ea59a1107/15_Patricia_B._Condon.mp4
|
2022
|
Information Science
|
Conference/Talk
|
To meet current and future workforce needs, business students entering the job market should be literate in working with and using data for a variety of purposes. Our presentation focuses on addressing business librarians as key stakeholders in the development of services to help improve data literacy in business and economics. While general and discipline-specific data literacy competencies have been identified, our work focuses on the data literacy needs seen in the disciplines of Business & Economics. In previous work (2019), we identified seven baseline business data literacy competencies that filled gaps in student and employee knowledge around data and data literacy. More recently, we mapped those data literacy competencies to the ACRL Framework for Information Literacy for Higher Education (Framework). This mapping helps establish a bridge between foundational library professional documents, business librarianship, and data literacy both in higher education and in the workplace, extending the conversation to how the Framework informs data literacy instruction. In this presentation we summarize the seven baseline business data literacy competencies and outline how they can be mapped to the Framework. From this mapping, we explore how business librarians can incorporate teaching data literacy skills and provide instruction informed by the Framework. This research will provide audience members with both context and foundation to develop strategies that integrate data literacy and the Framework into library instruction specific to the disciplines of Business & Economics.
|
English
|
10.5446/58072 (DOI)
| null |
Condon, Patricia B.
Pothier, Wendy G.
|
Patrician, David (Moderation)
|
HBSKnowledge: A Knowledge Graph and Semantic Search for HBS
|
https://av.tib.eu/media/58073
| null |
https://tib.flowcenter.de/mfc/medialink/3/def9ec0aee37ca2381e976e666b36e3092da5a52adad5c3023e7e367473f3ff84122/13_Erin_L._Wise.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Like many organizations, HBS has overlapping data in multiple repositories. These data are maintained in different ways for different business purposes, making it difficult to have a unified, cross-silo view of any given HBS-related entity. The library sought to address this challenge by creating a Proof of Concept for a Knowledge Graph that identifies unique entities (including people, companies and faculty works) across HBS repositories and defines relationships among them. This graph drives the data connections on our website, HBSKnowledge (HBSK). With this integrated structure we have uncovered many of the multiple and varying relationships among data across repositories. We have also set ourselves up to implement inferencing in future releases of the product to further enable the discovery of strategic information at HBS. In addition to structuring our data in graph form, we are using semantic search technology to enhance the search experience. We have leveraged our topic vocabularies, our company authority data, and our faculty & alumni authority data to steer users toward the most relevant information for them. The result is a product that enables discovery of 360 views of entities important to HBS. The HBSK PoC serves as an excellent product for demonstrating the promise of data integration and semantic search, the value of a Knowledge Graph in delivering on that promise, and the talent that exists in libraries for driving content structure and semantic technology. One of the lessons we (re)learned is that any AI initiative is only as good as its data inputs, and a foundation of well-structured, uniquely identified data is essential. To this end, many of our decisions about ontology and vocabulary development were informed by an understanding of library cataloging principles and practices.
|
English
|
10.5446/58073 (DOI)
| null |
Wise, Erin L.
|
Patrician, David (Moderation)
|
AI-powered software for literature searching: What is the potential in the context of the University Library?
|
https://av.tib.eu/media/58074
| null |
https://tib.flowcenter.de/mfc/medialink/3/de7b56a333bb63bfa13993bfae8cbdfbf85ff7107556c35dbd1e6072de68694afc/12_Solveig_Sandal_Johnsen___Julie_Kiersgaard_Lyngsfeldt.mp4
|
2022
|
Information Science
|
Conference/Talk
| null |
English
|
10.5446/58074 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Sandal Johnsen, Solveig
Kiersgaard Lyngsfeldt, Julie
Wildgaard, Lorna
Møller, Anne Vils
|
Patrician, David (Moderation)
|
Poster presentation: Rethinking university librarianship in the post-pandemic scenario
|
https://av.tib.eu/media/58075
| null |
https://tib.flowcenter.de/mfc/medialink/3/de6667db8ad121e5d671b44b3edad5efa9cedc773cda7d85aa27212c2cdca0d8e7/11_Arjun_Sanyal.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Post-pandemic, the problem with Indian universities was bringing students back to their former academic selves. The fact of being away from the universities, for long, have led to students developing an indifference towards academic curriculum. Secondly, they have developed a strange problem that goes beyond simple “library anxiety”, as Constance Mellon termed it. I call it “informational anxiety”. This peculiar malady is more about developing a distaste towards the educational informational resources, compounded by the fact of the ubiquitous digital poverty. Thus, being out of touch with the library actually leads to a sort of anxiety, regarding seeking educational information digitally as well as physically, shifting the students’ focus away from academia. The CUHP (Central University of Himachal Pradesh) library team devised a novel strategy to make students discover their love for their studies as an enjoyable pursuit and not as a tiresome obligation. First, we held mind mapping sessions with students on seeking information as regards how library services can be improved. After the completion of the session, we emailed the mind maps along with surveys, to the students, for any improvisations they saw fit. Secondly, we started an experimental makerspace-cum-third space where students could do whatever they felt like writing poetry, painting pictures and so on. Thirdly, we held some library motivational sessions for students relating to healthy lifestyle. Within two months, we saw students developing an interest for coming to campuses, particularly to libraries. In fact, the idea of makerspace-cum-third space and the motivational sessions appealed a lot to them in helping to rediscover the joy of learning by thinking passionately about the social milieu. This, I believe, will be a beneficial approach for libraries in general because learning succeeds when the individual thinks creatively, enthusiastically and in a jargon-free manner about things that appeal to him/her.
|
English
|
10.5446/58075 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Sanyal, Arjun
|
Patrician, David (Moderation)
|
Poster presentation: Trade Deficit?: An Analysis of Trade News Source Coverage in Business Aggregators and Suggestions for Increased Discovery
|
https://av.tib.eu/media/58076
| null |
https://tib.flowcenter.de/mfc/medialink/3/def93bfe64883c4d2294d23a675679c78816ab7bc4f35d6d7dd3ec6bb0cc03bdc0/10_Tim_Tully.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Trade journals and trade news sources are an invaluable source for business students, entrepreneurs, and job seekers, but there have not been any recent analyses to determine whether these sources are adequately represented in the aggregator databases used by Business Librarians. In this study, the researcher compiled a list of 768 quality trade news sources using the First Research industry reports from ABI/INFORM Collection and compared the full text coverage and the currency of coverage of these sources in Business Source Complete, ABI/INFORM Collection, Business Insights: Global, Nexis Uni, and Factiva using UlrichsWeb. This study identified whether there was full text coverage of these sources in additional aggregator products from EBSCO, ProQuest, Gale, and LexisNexis. The results of this study indicate that there is a significant lack of full text coverage and current full text coverage in the business aggregator packages and other aggregator packages available from library database vendors. Lastly, this study offers a few suggestions for how librarians can collaborate to increase the discoverability of trade sources that are not available in these aggregator packages.
|
English
|
10.5446/58076 (DOI)
|
CC Attribution - NonCommercial - ShareAlike 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this
|
Tully, Tim
|
Patrician, David (Moderation)
|
Poster presentation: An ENOEL toolkit: Open Education Benefits
|
https://av.tib.eu/media/58077
| null |
https://tib.flowcenter.de/mfc/medialink/3/de68eb84873a5f895e96ba0888eddc08609c6d2b87fc240b3462f9f7e8a6ef9e62/09_Paola_Corti.mp4
|
2022
|
Information Science
|
Conference/Talk
|
The ENOEL Toolkit features reusable and adaptable templates for Twitter cards, slides, and leaflets. It can be used at any institution to convey the convincing benefits of Open Education. It results from the work of the European Network of Open Education Librarians in 2021 and the beginning of 2022 and aims to help raise awareness of the importance of Open Education. The Toolkit points out benefits for four stakeholder groups: students, teachers, institutions, and society at large. The ENOEL members have helped translate the Toolkit into 16 language versions to make it more effective and inclusive at the local level in different EU countries. Great attention has been given to making and keeping the ENOEL Toolkit as open as possible. Thanks to its graphic simplicity and its open licence (CC BY), librarians willing to reuse it don’t need advanced skills to adapt it to their specific needs. ENOEL members designed the Toolkit to welcome the addition of institutional logos, changes in colours, and fonts to adapt to local communication guidelines, standards, and tools. Reusers can change the order of the benefits according to the preferences of each local context and specifically identified target groups. At the beginning of each file, instructions guide users to understand each tool’s structure, correctly attribute it when adapting, and find items in the files themselves.
|
English
|
10.5446/58077 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Corti, Paola
|
Patrician, David (Moderation)
|
Poster presentation: University Technology Transfer Process and University Libraries
|
https://av.tib.eu/media/58078
| null |
https://tib.flowcenter.de/mfc/medialink/3/de556afb22346aad7b5c300de34dc56eb6d8ddbe15f4b05882f531631c15611ecf62/08_Terence_William_O__Neill.mp4
|
2022
|
Information Science
|
Conference/Talk
|
This poster will depict the innovation ecosystem relevant to University Technology Transfer (UTT), particularly focusing on the current and potential roles that academic libraries play in supporting and interacting with these functions. In studying the process of UTT, the audience will gain insight into how UTT functions, the potential value their expertise can provide, while also helping develop an understanding of the terminology and metrics for success used in the UTT community. An important challenge for responding to the needs of this group is the constraints on what is available to them through University Libraries due to licensing and budgetary limitations. The poster will explore the opportunities and resources available that map to UTT needs while navigating those limitations, featuring open access and other available resources. Though most informed by the experience of the home country, differences in home-geography governance will also be reflected in the poster.
|
English
|
10.5446/58078 (DOI)
|
CC Attribution - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
O’Neill, Terence William
|
Patrician, David (Moderation)
|
Poster presentation: How to support early career researchers with identifying trustworthy academic events?
|
https://av.tib.eu/media/58079
| null |
https://tib.flowcenter.de/mfc/medialink/3/de282c35c48ccc67cd365992a0d508e5615c304b3c8424b097c1472ac94a378ce466/07_Julian_Franken.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Early career researchers, especially when lacking good support structures, can have difficulties identifying academic events like conferences that are of questionable integrity („predatory conferences“). In the ConfIDent project we aim to build a digital platform where researchers can inform themselves about academic events and get support with assessing an event’s trustworthiness. During the project we explored different strategies to evaluate an event’s trustworthiness, means of conveying this evaluation to the users of the platform and helping users to make their own judgements. This poster presentation will expand on those different strategies, discuss the currently preferred solution and highlight challenges.
|
English
|
10.5446/58079 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Franken, Julian
|
Patrician, David (Moderation)
|
Poster presentation: From Information Literacy to Data Literacy. How to progressively introduce students to research data? From search to research
|
https://av.tib.eu/media/58080
| null |
https://tib.flowcenter.de/mfc/medialink/3/de73ddc5942a8ee28f67ebb2aaa5488478d3555af55f20e87b343b016daa8f3cde/06_Deborah_Grbac.mp4
|
2022
|
Information Science
|
Conference/Talk
| null |
English
|
10.5446/58080 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Grbac, Deborah
|
Patrician, David (Moderation)
|
Poster presentation: interactive Virtual Assistant (iVA) – Enabling Data Collaboration by Conveying Legal Knowledge
|
https://av.tib.eu/media/58081
| null |
https://tib.flowcenter.de/mfc/medialink/3/deeac43baae4f0c6dd9f89749815a20ef2706fe92c62d34eeb543adfb9a1b8ee1d/05_Markus_Herklotz___Lars_Oberl__nder.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Collaboration on research data may be restricted by legal regulations in the areas of privacy or copyright law. Researchers face questions about whose data can be reused, which data can be shared, and how results can be stored or published. Still, legal knowledge does not belong to the main skillset of most data-oriented researchers and legal use cases regularly demand an individual assessment. Answering such questions of data collaboration is often time-consuming and resource costly. Further, these uncertainties may even nudge researchers not to share, use or reuse data at all. Even with appointed data protection officers and open science agents addressing these problems on an institutional level, a deliberation of each individual situation may not be possible due to time and staff limits. Out of this melange arises a demand for accessible and easily applicable legal information. In the Business, Economic and Related Data initiatives BERD@BW and BERD@NFDI we have been developing an interactive Virtual Assistant (iVA) to address this demand for legal information. iVA helps researchers and data service providers to understand the fundamental data privacy regulations and therefore enables them to evaluate their legal possibilities of data usage. With specific questions and the guidance of well-placed bits of information, iVA leads its users through a decision tree to convey the fundamentals of privacy laws. It enables users to contextualize the remaining uncertainties and provides a basis to facilitate further consultation of experts. iVA connects the theoretical knowledge and the user’s custom interest, which increases the expected learning effects and allows its users to apply the acquired knowledge directly to their own projects. At the INCONECSS Conference, we would like to share how iVA was created as an openly available and self-paced learning module that can be extended to further support data collaboration and FAIR principles.
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English
|
10.5446/58081 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Herklotz, Markus
Oberländer, Lars
|
Patrician, David (Moderation)
|
Poster presentation: The EconDesk Chatbot: Work in Progress Report on the Development of a Digital Assistant for Information Provision
|
https://av.tib.eu/media/58082
| null |
https://tib.flowcenter.de/mfc/medialink/3/deab7505f3c97fa35c5c759b3c5c30bdff32dcc63d8845aacd8ddc5fe06e1aee64094a/04_Omid_Ghiasvand.mp4
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2022
|
Information Science
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Conference/Talk
|
The Research Guide EconDesk of the ZBW – Leibniz Information Centre for Economics is to be supported by a chatbot in the future. Research Guide EconDesk stuff answers questions on literature search and library services and support users with their individual data search. On the one hand, the chatbot should support the colleagues from the existing EconDesk chat team in processing common user requests, which have increased due to the pandemic, and on the other hand, it should help to expand the range of services to support users from business and economics on the EconBiz portal. Over the last year, our cross-departmental team has been working with different stakeholders on the use cases and is currently working on our first prototype of the chatbot system. We made use of conversational UX design evaluation methods for designing chatbot persona and conversation flows for later implementation. Our chatbot has been developed based on NLP (Natural Language Processing) techniques. Machine learning and rule-based strategies are the main components of this approach and RASA is our main development framework. Another essential part of our project is preparing data for training and testing the machine learning algorithms. We labelled manually real chat-logs to make use of this data for our purposes. The data include intents or user inputs, actions or chatbot answers, and stories or conversation flows. Stories structure flows of conversation and are fundamental parts of the chatbot. Intents that are bases for training the NLU (Natural Language Understanding) and are used to indicate users’ purposes. They are created based on users’ intent and librarians’ experience, must be unique, and are then assigned manually in the chat transcripts.
|
English
|
10.5446/58082 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Ghiasvand, Omid
Kazakova, Anastasia
Unteutsch, Alexander
|
Patrician, David (Moderation)
|
Panel Discussion - Potential of AI for Libraries: A new level for knowledge organization?
|
https://av.tib.eu/media/58084
| null |
https://tib.flowcenter.de/mfc/medialink/3/de9ca89015de6bd899338a6d09836a600b19b41f30ee82981bf4bcd67959bb92ee/04_Panel_Discussion.mp4
|
2022
|
Information Science
|
Conference/Talk
|
„Potential of AI for Libraries: A new level for knowledge organization?“ What kind of support do researchers need from libraries? How might support and services benefit from AI? How can libraries best support the research process and add value using AI? What might be potential drawbacks? How will the work of librarians and researchers change? AI and humans working together: what will AI excel at and what will humans excel at? On the panel we will bring together experts from different backgrounds: Research, AI, Libraries, Thesaurus/ Ontology.
|
English
|
10.5446/58084 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Christensen, Cecile
Queissner, Martin
Suominen, Osma
Wise, Erin
|
Patrician, David (Moderation)
|
Structuring unstructured data for business, economic and related research
|
https://av.tib.eu/media/58085
| null |
https://tib.flowcenter.de/mfc/medialink/3/de81c51be184c3dd1a1d1b44375562bcd91de36eade7217d972d5c30b1987c73fdff/01_Ulrich_Krieger.mp4
|
2022
|
Information Science
|
Conference/Talk
|
In addition to structured data, which is often collected explicitly for research purposes, unstructured data is increasingly becoming relevant for research in economics and social sciences. These data often come from non-standard sources, such as websites, digital business reports, social media, etc., and they come in diverse formats (audio, video, text, image or multimodal) and large scale. This heterogeneity in data sets and their underlying unstructured formats give rise to new challenges for research data management such as adequate computing and storage resources, deeper knowledge of programming languages and machine learning methods for data collection, selection of appropriate metadata standards for data representation, and pre-processing and analysis. Thus it can be difficult for researchers and infrastructures to manage the complexity of re-usability of unstructured data and algorithms. To this end, the BERD@NFDI consortium will address these challenges as a contribution to the development of the National Research Data Infrastructure. The aim of BERD@NFDI is to build a powerful centralized platform for collecting, (pre-) processing, analyzing and preserving Business, Economic and Related Data. We will facilitate the integrated management of data, algorithms and other related resources and provide support in terms of services along the whole research cycle. We will dedicate special focus to unstructured (big) data, in line with the FAIR principles for research data. The presentation gives an overview of the starting position, the mission as well as the composition of the consortium and shows why the usage of unstructured data requires an extended model of empirical research. After a preliminary analysis of the community needs, we present the work program of the (entire) project.
|
English
|
10.5446/58085 (DOI)
|
CC Attribution - NonCommercial - ShareAlike 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this
|
Krieger, Ulrich
Busch, Anja
Latif, Atif
Limani, Fidan
Schumm, Irene
Saleh, Ahmed
|
Patrician, David (Moderation)
|
Wrap up - Key take away points of the conference
|
https://av.tib.eu/media/58086
| null |
https://tib.flowcenter.de/mfc/medialink/3/dec7a5f2dc3d4baaee622f787209bad395a7c51d09be3444260e785c301e8ea9d216/04_Wrap_Up.mp4
|
2022
|
Information Science
|
Conference/Talk
| null |
English
|
10.5446/58086 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Meyer, Thorsten
|
Patrician, David (Moderation)
|
Support Services for Systematic Literature Reviews in Economic and Business Studies – How Can Business Librarians Cooperate
|
https://av.tib.eu/media/58087
| null |
https://tib.flowcenter.de/mfc/medialink/3/deb3f05779c6bc02a43ab3db6c24cd5745648ee957a9ccc9c36748e0a58226ba65/03_Sabine_Rauchmann.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Whereas systematic literature reviews have become a standard in the health sciences, the method has usually been neglected by researchers in economic and business studies in favor of creating and working with primary data. In the last few years, business librarians have received an increasing number of consultation requests for systematic literature reviews. Due to Corona restrictions, the collection of new data in face-to-face or group settings was limited, prompting researchers to focus on aggregating results from previous research. Business librarians by themselves face the challenge of finding very few subject-specific resources or guides on sophisticated search options or the quality of source materials in databases for economic and business literature as well as subject specific reporting standards, frequently falling back on guidelines and best practices from medical libraries. This presentation starts by establishing key service components for supporting students and researchers in conducting systematic literature reviews by looking at best practices from all fields. Then, the presentation identifies knowledge mountains and gaps, i.e. in regard to functionalities and source quality of databases, information seeking behavior, analyzing and managing data as well as reporting guidelines in the economic and business studies. Given the enormous amount of knowledge needed, the presentation thirdly looks at options how business librarians can cooperate on an international level for creating space and infrastructure for sharing findings, insights and materials not only with fellow librarians but also with researchers. The presentation concludes with encouraging business librarians to combine forces for providing better support and teaching services for conducting systematic literature review in economic and business studies.
|
English
|
10.5446/58087 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Rauchmann, Sabine
|
Patrician, David (Moderation)
|
Systematic Literature Review – Enhancing methodology competencies of young researchers
|
https://av.tib.eu/media/58088
| null |
https://tib.flowcenter.de/mfc/medialink/3/de167f445c5c0db7604525fa95ae4e51fdfb29f0f019b89c17871fb24c7924985c303d/02_Franziska_Klatt.mp4
|
2022
|
Information Science
|
Conference/Talk
|
Method and approach Systematic literature reviews aim to reduce biases and redundancies in academic research by using a formalized, transparent and replicable process. The SLRM was adapted to the Economics context and information about it has been provided on the library’s website, which has been structured along the SLR process. In addition to a detailed description of each phase, a toolkit has been developed consisting of SLR sources, learning videos (“Understanding retrieval bias” and “Understanding publication bias”), feedback on example SLR articles, as well as individual advice. Findings The amount of articles using the SLRM published by the academic staff of the faculty for Economics and Management has increased since the publication of the library’s SLR website. Researchers especially need support with developing an appropriate research string as well as the conduction of a content analysis. Only a handful of libraries provide information on the SLRM. Implications Information about the SLRM is relevant for young researchers and can improve their methodology competences. Other information institutions can also refer to the website. We are currently working on a SLR online course.
|
English
|
10.5446/58088 (DOI)
|
CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Klatt, Franziska
| null |
Dynamical cores for numerical weather prediction
|
https://av.tib.eu/media/57506
| null |
https://tib.flowcenter.de/mfc/medialink/3/dec5cf9db331f0950ccd47af78b0e6a50e8dc8f4e910731af8e52202a0e1eadb3e/11_Knoth.mp4
|
2022
|
Mathematics
|
Conference/Talk
|
There is ongoing work worldwide to write new dynamical cores for numerical weather prediction. The reasons are simple refactoring, take into account new processor architectures, try new programming environments, and finally use latest achievements in numerical mathematics. I will summarize actual developments and show some examples from my own personal endeavor within the Climate Modeling Alliance (https://clima.caltech.edu/). Here we develop a new numerical core using the programming language Julia for a new earth system model which should learn from different data sources. The new dynamical core is based on a cubed sphere grid with high order continuous or discontinuous ansatz functions. To understand stability issues I have implemented standard test cases in the DG code FLUXO. Here the same stability issues were observed but could be resolved with a so called split-form kinetic energy conserving formulation. For a second planned formulation with continuous elements I have implemented my algorithm version in Matlab and subsequently in Julia. By means of the Held-Suarez example we will compare implementation details to get efficiency for both programming environments and present a new Rosenbrock-W-method where the explicit part has the strong stability preservation (SSP) property.
|
English
|
10.5446/57506 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Knoth, Oswald
| null |
The Göttingen eResearch Alliance
|
https://av.tib.eu/media/48245
| null |
https://tib.flowcenter.de/mfc/medialink/3/deff26cbff6ed47f4cd9a6f62b8c3ca03b5c5ce41ed39642fd95fc1f9d7f452cb977/Henne_The_Goettingen_eResearch_Alliance_An_Overview.mp4
|
2022
|
Information Science
|
Conference/Talk
| null |
English
|
10.5446/48245 (DOI)
|
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Henne, Timo
| null |
Is inclusiveness in scholcom really beneficial for scholarship?
|
https://av.tib.eu/media/19690
| null |
https://tib.flowcenter.de/mfc/medialink/3/de89d3591dfae2941ec2bb328a918c0b871cdcb829324548948505a5f9c75ae9c3/S4-6_Prof_Miho_Funamori_OAI12_Presentation_E.mp4
|
2021
|
Computer Science
Information Science
|
Conference/Talk
|
Talking about diversity and inclusion, we often take for granted that it benefits everyone and that it is a goal to be pursued for the sake of equality and innovation. However, there are cases where inclusion, in fact, can harm local scholarship. For instance, being included in global scholcomm assumes working on research topics that are interesting and relevant to the global audience. This presumption can undermine local scholarship focused on domestic issues such as national history, literature, local economy, legal framework, and other social issues. Since many countries put it on their agenda to compete globally and achieve high world university rankings, their researchers are sometimes forced to change their research topics to be able to publish in global and high-impact journals if they want to sustain their academic career. Thus, it can be said that the pursuit towards inclusive scholcom largely distorts the scholarship landscape, ending up in research detached from local interests. But shouldn’t research also serve local interests, especially if it is publicly funded? This presentation is based on discussions and confrontations that occurred at forming the internationalization of the University of Tokyo.
|
English
|
10.5446/19690 (DOI)
|
CC Attribution 4.0 International:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Funamori, Miho
| null |
Text, techné and tenure: what remains out of scope of research evaluation in Humanities disciplines and how to change it for the better?
|
https://av.tib.eu/media/19691
| null |
https://tib.flowcenter.de/mfc/medialink/3/de44b81ce43483a23b77945123fef456e9a2359d89acd51d65575f445c5c661bfb55/S4-4_Dr_Erzse__bet_Toth_Czifra_OAI12_Presentation_E.mp4
|
2021
|
Computer Science
Information Science
|
Conference/Talk
|
Peer review is central scholarly practice that carries fundamental paradoxes from its inception. On the one hand, it is very difficult to open up peer review for the sake of empirical analysis, as it usually happens in closed black boxes of publishing and other gatekeeping workflows that are embedded in a myriad of disciplinary cultures, each of which comes very different, and usually competing notions of excellence. On the other hand, it is a practice that carries an enormous weight in terms of gatekeeping; shaping disciplines, publication patterns and power relations within academia. This central role of peer review alone explains why it is crucial to study to better understand situated evaluation practices, and to continually rethink them to strive for their best, and least imperfect (or reasonably imperfect) instances. How the notion of excellence and other peer review proxies are constructed and (re)negotiated in everyday practices across the SSH disciplines; who are involved in the processes and who remain out; what are the boundaries of peer review in terms of inclusiveness with content types; and how the processes are aligned or misaligned to research realities? What are the underlying reasons behind the persistence of certain proxies in the system and what are emerging trends and future innovations? To gain an in-depth understanding of these questions, as part of the H2020 project OPERAS-P, our task force collected and analysed 32 in-depth interviews with scholars about their motivations, challenges and experiences with novel practices in scholarly writing and in peer-review. The presentation will showcase the results of this study. Focus will be on the conflict between the richness of contemporary scholarship and the prestige economy that defines our current academic evaluation culture. The encoded and pseudonymized interview transcripts that form the basis of our analysis will be shared as open data in a certified data repository together with a rich documentation of the process so that our interpretations, conclusions and the resulting recommendations are clearly delineable from the rich input we had been working with and which are thus openly reusable for other purposes.
|
English
|
10.5446/19691 (DOI)
|
CC Attribution 4.0 International:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
|
Toth Czifra, Erzsébet
| null |
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