A complex system will adapt to a given environment "by providing second order feedbacks that veto all states of equilibrium, except those that leave each essential variable within its proper limits".

Furthermore:"The organism's reacting part is itself divided into subsystems between which there is no direct connection. Each subsystem is assumed to have its own essential variables and second order feedback". (ASHBY, 1960, pp.208-209)

This concept is obviously akin to:

1. - Vendryes' autonomy by internal regulations

2.- Maturana and Varela's organizational closure

3. - Eigen and Schuster's hypercycle

An important remark by ASHBY is that "The environment is assumed to be polystable" (Ibid). Of course, no adaptation would be possible in a totally incoherent environment.

1) general information

Tag cloud geneated by TagCrowd



comments powered by Disqus
Concepts extracted by AlchemyAPI AlchemyAPI