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UID:0-1008@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20250204T110000
DTEND;TZID=Europe/Paris:20250204T123000
DTSTAMP:20250127T143707Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-xiaowen-chen-lpens/
SUMMARY:Séminaire du LPTMS: Xiaowen Chen (LPENS) - Salle des séminaires d
 u FAST et du LPTMS\, bâtiment Pascal n°530 - 4 Fév 25 11:00
DESCRIPTION:Inferring collective behavior from social interactions to popul
 ation coding\nXiaowen Chen (LPENS)\n&nbsp\;\n\nFrom social animals to neur
 onal networks\, collective behavior is ubiquitous in living systems. How a
 re these behaviors encoded in interactions\, and how do they drive biologi
 cal functions? Recent insights from statistical physics applied to biologi
 cal data have offer exciting new perspectives. However\, previous research
  has mostly focused on the statics\, i.e. the steady-state distributions o
 f the collective behavior\, without taking into consideration of time. In 
 this talk\, I will present two recent progresses tapping into the temporal
  domain. First\, I will present a study of collective behavior in social m
 ice from their co-localization patterns. To capture both static and dynami
 c features of the data\, we developed a novel inference method termed the 
 generalized Glauber dynamics (GGD) that can tune the dynamics while keepin
 g the steady state distribution fixed. I will first outline the explanatio
 n power of the GGD dynamics\, then explain how to infer the dynamics from 
 data. The inferred interactions characterize sociability for different mic
 e strains.  In the second example\, we studied information flow among neu
 rons in the larval zebrafish hindbrain. By adapting the method of Granger 
 causality to single cell calcium transient data\, we were able to detect b
 oth a global information flow among neurons\, as well as identifying brain
  regions that are key in locomotion. 
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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