BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Vienna
BEGIN:DAYLIGHT
DTSTART:20250330T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20251026T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260424T063017Z
UID:1745485200@ist.ac.at
DTSTART:20250424T110000
DTEND:20250424T120000
DESCRIPTION:Speaker: Daniel Riveline\nhosted by Edouard Hannezo\nAbstract: 
 Cells\, tissues and organs can rotate spontaneously in vivo and in vitro. 
 These motions are remarkable for their robustness and for their potential 
 functions. However\, physical mechanisms coordinating these dynamics are p
 oorly understood.I will present two examples of spontaneous rotation with
  experiments synergized with theory (1\,2). In a first study (1)\, we repo
 rt that rings of epithelial cells can undergo spontaneous rotation below
  a threshold perimeter. We demonstrate that the tug-of-war between cell po
 larities together with the ring boundaries determine the onset to coherent
  motion. The principal features of these dynamics are recapitulated with a
  Vicsek model. In a second study (2)\, we show that cell doublets rotate i
 n a 3D matrix and we identify mesoscopic structures leading the movement. 
 Our theoretical framework integrates consistently cell polarity\, cell mot
 ion\, and interface deformation. We also report that the Curie principle i
 s verified in its symmetry rules. Altogether both examples could set gener
 ic rules to quantify and predict generic motion of tissues and organs. 1-
  S. Lo Vecchio et al. (https://doi.org/10.1038/s41567-023-02295-x) Nature 
 Physics 20:322–331 (2024).2- L. Lu et al. (https://doi.org/10.1038/s4156
 7-024-02460-w) Nature Physics 20:1194–1203 (2024).
LOCATION:Moonstone Bldg / Ground floor / Seminar Room F (I24.EG.030f)\, IST
 A
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Daniel Riveline: Collective rotations: experiments and theory
URL:https://talks-calendar.ista.ac.at/events/5679
END:VEVENT
END:VCALENDAR