Complex Oscillatory Behaviours in Physarum polycephalum and a Particle Approximation


This page contains supplementary images and video recordings for the paper:

"The Emergence of Complex Oscillatory Behaviour in Physarum polycephalum and its Particle Approximation"

by Soichiro Tsuda and Jeff Jones,
Submitted to the XII International Conference on Artificial Life.

(Please not that the supplementary video recordings require the Adobe Flash Plugin, in order to view the recordings.)



Comparison of the emergence of synchronous oscillations in plasmodium of Physarum polycephalum (left, 1.6mm well) and the particle approximation (right, 100 pixel well).

In both examples image have been spatially and temporally filtered to remove noise.



Emergence and Transitions of Oscillatory Behaviour in a Particle Collective approximating Physarum polycephalum.



Schematic illustration of: a) Particle morphology, b) overlapping sensory behaviour in transport networks, c) overlapping sensory behaviour in solid plasmodium arrangement



Sensory parameter evaluation of oscillatory behaviours:
SA Left to right: 22.5, 45, 67.5 and 90 degrees
RA Left to right: 22.5, 45, 67.5, and 90 degrees.

Each well is occupied at 90% free space. SO started at 3 pixels and was incremented by 3 every 1000 steps.
(Unprocessed chemoattractant flux images are shown.)



Illustration of how fixed SO parameter during an experimental run results in unchanging pattern type, although pattern scale is increased.
P90, SA 22.5, RA 45.


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Video Illustration of how fixed SO parameter during an experimental run.
P90, SA 22.5, RA 45.
Left to right: SO 9, 21, and 41 pixels.




Illustration of changing oscillation patterns when SO is increased gradually during an experiment.
Phase plots from video recordings shown below.
Well size: a) 100 pixels, b) 200 pixels, c) 300 pixels, 4) 400 pixels


The examples below show how the gradual increase of sensory radius
changes the oscillatory patterns of the particle collective.
P90, SA 22.5, RA 45, SO 3 and increasing by 3 every 500 steps.


Left to right: 100 pixel well, 200 pixel well.



Left to right: 300 pixel well, 400 pixel well.



Illustration of the main regular oscillation patterns observed during experiments.

a) Rotational pattern (200 pixel well)
b) Bilateral oscillation (100 pixelwell)
c) Annular oscillation (100 pixel well)





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