Stochastic Thermodynamics, Active Matter and Driven Systems
2
Topology in Biology
3
Active particles convert energy to motion Energy enters the system on a single particle level
4
Active turbulence
5
Active turbulence of cells?
6
Dense active matter and active turbulence
7
Liquid crystals
8
Continuum equations of liquid crystal hydrodynamics
9
Hydrodynamics of active systems
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Continuum equations of active liquid crystal hydrodynamics
11
1. Active stress =active turbulence
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Instabilities in active nematic
13
Active turbulence is characterized by
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Active turbulence: topological defects are created and destroyed
15
Unidirectional Alignment of the Active Nematic
16
States of an Active Nematic in a Channel
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Ceilidh Dance
18
Vortex lattice and active topological microfluidics
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Transition to Turbulence
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Vorticity distribution
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Enstrophy kymograph
22
Directed percolation
23
Turbulent fraction as a function of activity
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Confinement is a way of harnessing active energy
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Cell division
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2. Division acts as extensible stress
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Flow field around +1/2 defect
28
Extrusion of dead cells - correlated to topological defects
29
Confinement by walls can lead to regular vortex lattices in active systems & topological microfluidics
30
Q&A
Description:
Explore the fascinating intersection of topology and biology in this 52-minute lecture by Julia Yeomans at the International Centre for Theoretical Sciences. Delve into the world of active matter, stochastic thermodynamics, and driven systems, focusing on how topological concepts apply to biological phenomena. Learn about active turbulence in dense matter, liquid crystal hydrodynamics, and the role of topological defects in cell behavior. Discover how confinement can harness active energy and influence cell division processes. Examine the transition to turbulence, vortex lattice formation, and the application of topological microfluidics in biological systems. Gain insights into cutting-edge research connecting statistical physics with living biological matter, and understand how these concepts contribute to our understanding of complex biological processes.