1) The document discusses various concepts related to self-sustainability including linear stability, structural stability, homeostasis, homeochaos, Gaia hypothesis, embodied daisy world, mind time machine, automatic computing engine, edge of chaos, epsilon machine, and examples of adaptability and homeostasis in cellular automata. 2) Key figures and ideas discussed include W. Ross Ashby and his work on ultrastability and homeostasis, K. Kaneko and T. Ikegami's work on homeochaos, Jame Lovelock's Gaia Hypothesis, Ikegami and Suzuki's work on embodied daisy world and from homeostatic to homeodynamic self,

1. Self-Sustainability
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2. Linear stability
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4. Structural Stability
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cf. T Chaos
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5. 5

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8. 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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9. Ashby was mainly concerned with homeostasis. He
thought life’s adaptive behavior is only an outcome of
homeostatic property.
W.Ross Ashby’s
Ultastability!
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10. Homeostat designed
by W. Ross Ashby in 1948
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11. W.R.Ashby’s note “Design for Brain”
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12. 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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13. Jame Lovelock’s Gaia Hypothesis (1965)
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.
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14. Does Gaia hypothesis say that the earth itself is
teleological?
Is Darwin’s theory incomplete???
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15. 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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16. Embodied Daisy World
Ikegami, T and Suzuki, K, From Homeostatic to Homeodynamic Self,
BioSystems, 91 (2008) 388-400
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17. Mind Time Machine
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18. Automatic Computing Engine
by Alan Turing (1946)
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19. Edge of Chaos (EOC)
Epsilon-machine (J. Crutchfield)
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20. Adaptability and Homeostasis in the Game of Life interacting with
the evolved Cellular Automata
Keisuke Suzuki and Takashi Ikegami, (in press)
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23. See many other
examples:
Robustness in artificial life
J. Biologically Inspired Computation (2010).
by E. Silverman and T. Ikegami
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