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Jason Jixuan Hu, Ph.D.
Independent Research Scholar & Discussant
Club of REMY: www.clubofremy.com
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https://en.wikipedia.org/wiki/Jason_Jixuan_Hu
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“when we study the brain we are again studying a means to
survival.”
Well said quote from Ross-Ashby. Motivation is what moves the brain and all living organisms to survival, yet most studies of the brain focus on cognition.
Cognition alone does not define the goal of an organism, many people are attracted to it because, I think, it has a huge variety of “objective” categories. Motivation provides the means of reducing variety to a manageable number, such as Ross-Ashby’s Homeostat.
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Jon,
Ashby said "the regulator's function is to block the flow of information".
This is exactly how a simple nonlinear element works, it blocks information on some ranges of stimuli, like a diode with a dead zone near zero or an amplifier with saturation.
Unfortunately, if we approach nonlinearity with linear tools then we end up with creating unnecessary complexity and will not see the essence of regulation. I had a meeting recently with Stuart Umpleby and a very small group where I explained this in detail.
Ashby’s approach to analysis is what is known as Modern Control Theory, it can accommodate nonlinear dynamics but essentially is a linear tool which depends on negative feedback control.
Modeling a simple regulator, such as hysteresis or feeding satiation in animals, will be unimaginably complex if attempted with only linear elements, but with a couple of diodes and saturation elements it would be dead easy.
Nonlinear analysis tools exist for continuous dynamic systems, such as Multidimensional Laplace Transforms.
Best.
Faisal
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