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DESCRIPTION:ISS Informal Systems Seminar\n\nSpeaker: Denis Ullmo – Universi
 té Paris-Saclay\, France \n\n \n\n\n	\n\n	Presentation on YouTube.\n\n	Abstra
 ct: In this talk\, I will consider the dynamics of crowds at the 'operatio
 nal' level\, which corresponds to the relatively short time and length sca
 le associated for instance with a single obstacle. Comparing various model
  predictions with experimental data\, I will show that\, contrary to what 
 is usually assumed in such context\, it is necessary to take into account 
 the fact that pedestrians have the capacity to 'anticipate' to reproduce e
 ven the qualitative properties of the experimental data. Models based on a
 n analogy with granular materials therefore fail drastically\, and even mo
 dern models of crowds dynamics including short term (ie up to the next col
 lision) anticipation are unable to reproduce the essential feature of the 
 experiments. Furthermore\, I will show that a very simple model based on M
 ean Field Game\, that can be analyzed through a very elegant connection wi
 th the non-linear Schrödinger equation\, is able (actually by construction
 ) to take into account the effects of anticipation of the pedestrians\, an
 d reproduce nicely the important features of the experiment.\n\n	\n	Biograph
 y: Dr. Ullmo holds a Directeur de Recherche (Senior Research Scientist) po
 sition at the French CNRS (Centre National de la Recherche Scientifique) w
 ithin the Paris-Saclay university\, and is since 2018 the head of the Pari
 s-Saclay Institut Pascal. He did his Ph. D. at Paris-Sud University in The
 oretical Physics\, under the supervision of Oriol Bohigas\, and has worked
  extensively in the fields of quantum chaos and mesocopic physics. On the 
 first subject his contributions include works on mixed system and chaos as
 sisted tunneling\, and in the second orbital magnetism\, Coulomb blockade\
 , Kondo effect and graphene. More recently\, he has developed a line of re
 search around Mean Field Game using in particular the connection between t
 his theoretical framework and the Non-Linear Schrodinger equation familiar
  to quantum physicist\, making it possible to use tools and technique deve
 loped by physicists to gain a deeper understanding of the behavior of Mean
  Field Games. In the last few years\, his interest with MFG has evolved to
 ward applications to crowd behavior and epidemics dynamics. See : Homepage
 \n\n
DTSTART:20221111T150000Z
DTEND:20221111T160000Z
LOCATION:CA\, ZOOM
SUMMARY:A Mean Field Game Description of Pedestrian Dynamic 
URL:/cim/channels/event/mean-field-game-description-pe
 destrian-dynamic-351655
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