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Link to talk from:


KITP // Morphodynamics of Plants, Animals and Beyond // August 24 - September 25, 2009



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The following (4) movies are supplementary files from our paper:


Initialization and equilibration of SEM cell  (10.5MB)

This movie visually demonstrates how a 1024 element cell is constructed by first placing the elements randomly within close proximity to each other and then equilibrating the aggregate with decaying thermal fluctuations. The filaments connecting spherical elements represent the short ranged element-element interactions which are defined by an interaction potential. Thick yellow filaments roughly denote nearest neighbor interactions, and increasingly thinner and green filaments roughly denote next-nearest neighbor interactions.    



Cell Stretching 1  (6.9MB)

This movie shows a 256 element cell equilibrated between two boundaries. The cell is stretched with a constant stress of 28.09 Pa for a period of 10 seconds to observe creep response and then released for a period of 40 seconds to observe recovery. The portion showing recovery is fast forwarded 2x and the rotation of the cell is just for visualization.   


Cell Stretching 2  (11.1MB)

This movie shows a 1024 element cell equilibrated between two boundaries. The cell is stretched with a constant stress of 21.36 Pa for a period of 10 seconds to observe creep response and then released for a period of 40 seconds to observe recovery. The portion showing recovery is fast forwarded 2x and the rotation of the cell is just for visualization.   


Bead Rheology  (13.8MB)

This movie shows a 4096 element cell equilibrated with a red bead in the bulk. The bead is perturbed with a 2 nN oscillatory driving force at a frequency of 10 Hz. A much larger driving force amplitude (200x) is used here than what was used in the simulation results presented our paper. This is done to obtain a large enough bead trajectory amplitude (0.8 microns) for visualization purposes. 



Other Movies:


2D proliferation  (18MB)


Cell Stretching with "polymerization/depolymerization" events  note filaments fading in and out (19MB)


3D proliferation of a sheet of cells  (11MB)


Face slap [front]  (508KB)


Face slap [side]  (336KB)