Lecture4
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Self-Sustainability 1
description
Lecture series by Prof. Takashi Ikegami.
Transcript of Lecture4
Self-Sustainability
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Linear stability
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Structural Stability
cf. T Chaos3
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Homeochaos
K. Kaneko and T. Ikegami," Homeochaos: Dynamics Stability of a symbiotic network with population dynamics and evolving mutation rates" Physica 56 D (1992) , 406-429
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W.Ross Ashby’s Ultastability!
Ashby was mainly concerned with homeostasis. He thought life’s adaptive behavior is only an outcome of homeostatic property.
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Homeostat designed by W. Ross Ashby in 1948
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W.R.Ashby’s note “Design for Brain”
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The homeostatic network code is based on C code by Alice Eldridge (University of Sussex). Many of the initial parameter settings came out of Alice's experiments with homeostatic music, for example fond punctions. See www.ecila.org for more information about Alice's projects (there are some samples of sonified homeostats in her 'academic' section).
The user interface was built using John Beech's MyGUI class: http://www.mkv25.net/MyGUI/doc/.The code was written in Processing.
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He defined Gaia as: complex entity involving the Earth's biosphere, atmosphere, oceans, and soil; the totality constituting a feedback or cybernetic system which seeks an optimal physical and chemical environment for life on this planet.
Jame Lovelock’s Gaia Hypothesis (1965)
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Does Gaia hypothesis say that the earth itself is teleological?
Is Darwin’s theory incomplete???
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Top plot shows %area covered with daisies, or barren. Bottom plot shows the planetary temperature achieved by daisy feedback (pink) vs. what the temperature would have been if the planet were barren. X-axis is solar luminosity.
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Embodied Daisy World
Ikegami, T and Suzuki, K, From Homeostatic to Homeodynamic Self, BioSystems, 91 (2008) 388-400
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Mind Time Machine
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Automatic Computing Engine by Alan Turing (1946)
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Epsilon-machine (J. Crutchfield)
Edge of Chaos (EOC)
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Adaptability and Homeostasis in the Game of Life interacting withthe evolved Cellular AutomataKeisuke Suzuki and Takashi Ikegami, (in press)
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See many other examples:
Robustness in artificial lifeJ. Biologically Inspired Computation (2010).by E. Silverman and T. Ikegami
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