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Nombre de programmes trouvés : 2918

le (57m1s)

Les technologies éducatives et l'université dans les dernières grandes réformes de l'université française

L’auteur développe les relations que l’institution (l’enseignement supérieur dans sa diversité française) établit avec les problématiques soulevées par les dimensions pédagogiques et techniques. Elle identifie : les dynamiques à l’œuvre qui se mettent en place quelle que soit la conduite des acteurs (tendances technophiles ou technophobes ; tenants de la culture et tenants de la pédagogie ; obstacles récurrents ; résistances diverses ; erreurs réitérées ; acquis saillants ; etc.) ; les acteurs du champ qui infléchissent effectivement aujourd’hui les dynamiques à l’œuvre dans le supérieur ; les idéologiques sous-jacentes ; les problématiques et questions qu’un tel ...
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Label UNT Conférences

le (57m2s)

Simulation of HPC systems part 3

The first part of the tutorial will present and contrast current experimental methodologies, giving attendees in-depth understanding of the scientific and technological issues at hand. The second part of the tutorial will focus on simulation, giving a state of the art of current simulation technology and discussing challenges for the development of sound simulation models. The tutorial will use the SimGrid simulation framework as an exemplar since it implements sophisticated and validated simulation models. The last part of the tutorial will ...
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Cours magistraux

le (57m3s)

Bubeck 9/9 - Some geometric aspects of randomized online decision making

This course is concerned with some of the canonical non-stochastic models of online decision making. These models have their origin in works from the 1950's and 1960's, and went through a resurgence in the mid-2000's due to many applications in the internet economy. This course focuses on a set of challenging conjectures around these models from the 1980's and 1990's. We present a unified approach based on a combination of convex optimization techniques together with powerful probabilistic tools, which will allow us to derive state of the art results in online learning, bandit optimization, as well as some classical online computing ...
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le (57m9s)

Maciej Zworski - Fractal uncertainty for transfer operators

I will present a new explanation of the connection between the fractal uncertainty principle (FUP) of Bourgain-Dyatlov, a statement in harmonic analysis, and the existence of zero free strips for Selberg zeta functions, which is a statement in geometric scattering/dynamical systems. The connection is proved using (relatively) elementary methods via the Ruelle transfer operator which is a well known object in thermodynamical formalism of chaotic dynamics. The talk will assume no knowledge of the subject and I will also present applications of FUP to properties ...
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le (57m17s)

R. Santharoubane - Quantum representations of surface groups

I will show how we can produce exotic representations of surface groups from the Witten-Reshetikhin-Turaev TQFT. These representations have infinite images and give points on character varieties that are fixed by the action of the mapping. Moreover we can approximate these representations by representations into finite groups in order to build exotic regular finite covers of surfaces. These covers have the following property: the integral homology is not generated by pullbacks of simple closed curves on the base. This is joint work with Thomas Koberda.
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le (57m18s)

The Optimal Rule of Decision-making for Areopagus: Public Voting or Apparent Consens?

La sagesse collective : principes et mécanismesColloque des 22-23 mai 2008, organisé par l'Institut du Monde Contemporain du Collège de France, sous la direction du Professeur Jon Elster.Intervention de Philippe Urfalino.Areopagus, as are constitutional courts and committees of experts, are expected to reach decisions which must be justified by reasons. Their members are not elected but appointed with a reference to their specific competence. With regard to the nature of the decisions they make and the intellectual quality of their members, areopagus are strongly associated with an idea of a certain kind of wisdom. One of the questions areopagus are ...
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