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CATEGORIES:DAMTP BioLunch
SUMMARY:Two emergent biophysical phenomena motivated by Tu
 ring and Jeffery - Mohit Dalwadi\, University Coll
 ege London
DTSTART;TZID=Europe/London:20231109T130000
DTEND;TZID=Europe/London:20231109T140000
UID:TALK205807AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/205807
DESCRIPTION:In this talk I use applied mathematics to understa
 nd two emergent phenomena related to fundamental b
 iophysical problems. They are linked to one anothe
 r via the multiscale techniques I use to understan
 d them.\n\nIn the first part\, I discuss an overar
 ching question in developmental biology: how is it
  that cells are able to decode spatio-temporally v
 arying signals into functionally robust patterns i
 n the presence of confounding effects caused by un
 predictable or heterogeneous environments? This is
  linked to the general idea first explored by Alan
  Turing in the 1950s. Through multiscale analysis\
 , I present a general theory of pattern formation 
 in the presence of spatio-temporal input variation
 s\, and show how biological systems can generate n
 on-standard dynamic robustness for 'free' over phy
 siologically relevant timescales.\n\nIn the second
  part\, I investigate how the rapid spinning of 3D
  microswimmers affects their emergent (observed) t
 rajectories in shear flow. This is an active versi
 on of the classic fluid mechanics result of Jeffer
 y's orbits for inert spheroids\, first explored by
  George Jeffery in the 1920s. I show that the shor
 t-scale rapid 3D spinning exhibited by many micros
 wimmers can have a significant effect on longer-sc
 ale trajectories\, despite the common neglect of t
 his spinning in some mathematical models\, and how
  this can be systematically incorporated into modi
 fied versions of Jeffery's original equations.
LOCATION:MR15\,  Centre for Mathematical Sciences\, Wilberf
 orce Road\, Cambridge
CONTACT:Marco Vona
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