Hysteresis and the Limits of Homeostasis: from Daisyworld to Phototaxis
Hysteresis and the Limits of Homeostasis: from Daisyworld to Phototaxis
All biological organisms must be able to regulate certain essential internal variables, e.g. core body temperature in mammals, in order to survive. Almost by definition, those that cannot are dead. Changes that result in a mammal being able to tolerate a wider range of core body temperatures make that organism more robust to external perturbations. In this paper we show that when internal variables are regulated via ‘rein control’ mechanisms, decreasing the range of tolerable values increases the area of observed hysteresis but does not decrease the limits of regulation. We present circumstances where increasing the range of tolerable values actually decreases robustness to external perturbation.
241-246
Dyke, J. G.
e2cc1b09-ae44-4525-88ed-87ee08baad2c
Harvey, I. R.
2e579894-3074-48bc-b8a3-454364b3709c
2005
Dyke, J. G.
e2cc1b09-ae44-4525-88ed-87ee08baad2c
Harvey, I. R.
2e579894-3074-48bc-b8a3-454364b3709c
Dyke, J. G. and Harvey, I. R.
(2005)
Hysteresis and the Limits of Homeostasis: from Daisyworld to Phototaxis.
Proceedings of VIIIth European Conference on Artificial Life, ECAL 2005.
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Abstract
All biological organisms must be able to regulate certain essential internal variables, e.g. core body temperature in mammals, in order to survive. Almost by definition, those that cannot are dead. Changes that result in a mammal being able to tolerate a wider range of core body temperatures make that organism more robust to external perturbations. In this paper we show that when internal variables are regulated via ‘rein control’ mechanisms, decreasing the range of tolerable values increases the area of observed hysteresis but does not decrease the limits of regulation. We present circumstances where increasing the range of tolerable values actually decreases robustness to external perturbation.
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Published date: 2005
Venue - Dates:
Proceedings of VIIIth European Conference on Artificial Life, ECAL 2005, 2005-01-01
Organisations:
Agents, Interactions & Complexity
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Local EPrints ID: 272876
URI: http://eprints.soton.ac.uk/id/eprint/272876
PURE UUID: 33a3791d-06fd-493e-ac79-0a7189d77839
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Date deposited: 29 Sep 2011 12:46
Last modified: 14 Mar 2024 10:12
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Author:
I. R. Harvey
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