BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20250724T192807EDT-8781dBVz8E@132.216.98.100 DTSTAMP:20250724T232807Z 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 END:VEVENT END:VCALENDAR