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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-569@lptms.universite-paris-saclay.fr
DTSTART:20180320T110000Z
DTEND:20180320T120000Z
DTSTAMP:20180314T101921Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-lev-truskinovsky/
SUMMARY:Séminaire du LPTMS: Lev Truskinovsky - LPTMS\, salle 201\, 2ème 
 étage\, Bât 100\, Campus d'Orsay - 20 Mar 18 11:00
DESCRIPTION:Rigidity generation by nonthermal fluctuations and muscle contr
 action\nLev Truskinovsky (ESPCI\, Paris)\nActive stabilization in systems 
 with zero or negative  stiffness is an essential element of a wide variet
 y of technological processes. We discuss a prototypical example of this  
 phenomenon in a  biological setting and show how active rigidity\, interp
 reted as a formation of a pseudo-well in the effective energy  landscape\
 , can be generated in an over-damped stochastic system. We link the transi
 tion from negative to positive  rigidity with time correlations in the ad
 ditive noise\, and  show that subtle differences in the out-of-equilibriu
 m  driving may compromise the emergence of a pseudo-well. We apply our re
 sults to the description of  the power  stroke machinery in skeletal mus
 cles  which is behind their  remarkable  ability to take up an applied 
 slack in a ms time  scale. Along the way we draw some interesting paralle
 ls between muscle  physiology and the theory of spin glasses.
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
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  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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