Aller au contenu  Aller au menu  Aller à la recherche

Bienvenue - Laboratoire Jacques-Louis Lions

Partenariats

CNRS

UPMC

UPMC
Print this page |

Postes Enseignants-Chercheurs :

Cliquer sur : Operation POSTES sur le site de la SMAINouvelle fenêtre

Cliquer sur : GALAXIENouvelle fenêtre

 

Cliquer sur : les postes ouverts au Laboratoire Jacques-Louis Lions en 2017

 

 » En savoir +

Chiffres-clé

Chiffres clefs

217 personnes travaillent au LJLL

83 personnels permanents

47 enseignants chercheurs

13 chercheurs CNRS

9 chercheurs INRIA

2 chercheurs CEREMA

12 ingénieurs, techniciens et personnels administratifs

134 personnels non permanents

85 doctorants

16 post-doc et ATER

5 chaires et délégations

12 émérites et collaborateurs bénévoles

16 visiteurs

 

Chiffres janvier 2014

 

Leçons Jacques-Louis Lions 2016 11h30 : mini-cours 3 : E. Tadmor

15 juin 2016  : 11h30—13h00

Eitan Tadmor (Université du Maryland)
Collective dynamics : flocking, emergence of patterns and social hydrodynamics
(3ème séance du mini-cours des Leçons Jacques-Louis Lions 2016)


Abstract
 This mini-course is focused on the dynamics of systems driven by the “social engagement” of agents with their neighbors. Prototype models based on environmental averaging are found in opinion and crowd dynamics of human networks, flocking, self-organization of biological organisms, and rendezvous of mobile systems.

 We begin with a survey of several classical models of agent-based systems. We then follow with two natural questions that arise in the context of such systems : what is their large time behavior and what is the effective dynamics when the number of their agents tends to infinity.
 The underlying issue of the first question is the emergence over time of large-scale patterns, and in particular, how different rules of engagement influence the formation of clusters e.g., the emergence of “consensus”. We propose an alternative paradigm based on the tendency of agents “to move ahead” which leads to the formation of trails and emergence of leaders.
 The second question is concerned with different descriptions of collective dynamics which arise with large crowds of agents, and in particular, the formation of Dirac masses at the kinetic level of description, and the study of critical thresholds for macroscopic regularity at the level of social hydrodynamics.