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- From: andrick@rhrk.uni-kl.de (Ulf Andrick [Biologie])
- Subject: Re: Biologically Plausible Dynamic Artificial Neural Networks
- Message-ID: <1993Jan6.224107.27144@rhrk.uni-kl.de>
- Organization: University of Kaiserslautern, Germany
- X-Newsreader: Tin 1.1 PL4
- References: <726213237snz@manor.demon.co.uk>
- Date: Wed, 6 Jan 1993 22:41:07 GMT
- Lines: 97
-
- paulf@manor.demon.co.uk (Paul Fawcett) writes:
- :
- : Biologically Plausible Dynamic Artificial Neural Networks.
- : -----------------------------------------------------------
-
- Biologically Plausible Artificial Neural Network sounds to me
- a bit like an oxymoron. I tend to consider any `Artificial Neural
- Networks' as not biologically plausible.
-
- :
- : A *Dynamic Artificial Neural Network* (DANN) [1]
- : possesses processing elements that are created and/or
- : annihilated, either in real time or as some part of a
- : development phase [2].
- :
- : Of particular interest is the possibility of
- : constructing *biologically plausible* DANN's that
- : models developmental neurobiological strategies for
- : establishing and modifying processing elements and their
- : connections.
- :
- : Work with cellular automata in modeling cell genesis and
- : cell pattern formation could be applicable to the design
- : of DANN topologies. Likewise, biological features that are
- : determined by genetic or evolutionary factors [3] would
- : also have a role to play.
- :
-
- Cellular automata? One might feel reminded of the Game of
- Life, where the cells change their state of being alive or
- dead according to the states of the neighbouring cells. If
- something like that is suggested, I feel somewhat skeptical if
- that is of use. I thought that the main issue of neurogenesis
- was the formation of synapses. That means, e. g., how do the
- neuronal processes find their way to their targets through a
- nascent entanglement of cells (not necessarily neurones, but
- also glia)? How is synaptic coupling changed in response to some
- stimulus? So, are your `cells' neurones, processes, synapses, or what?
-
- But perhaps you meant a concept of a cellular automaton so general
- that one might consider the use of the word as nearly
- meaningless.
-
- At least, the point seems to be a little mute to a person with
- some half-knowledge about cellular automata and neurogenesis.
-
- : Putting all this together with a view to constructing a
- : working DANN, possessing cognitive/behavioral attributes of
- : a biological system is a tall order; the modeling of nervous
- : systems in simple organisms may be the best approach when
- : dealing with a problem of such complexity [4].
-
- There seems to be enough work to be done to simulate `static' Neural
- Networks in simple organisms. An interesting question is, e. g.,
- what role the complex electrophysiological properties of the single
- neuron play for the behaviour of the whole network? What are
- the effects of neuromodulators? And these questions may
- also be of relevance in neural development.
-
- Artificial Neural Networks do hardly play any role in that
- kind of research, IMVHO, unless they have sophisticated
- neuronal properties, which most information scientists never
- dream of, but I wouldn't call such a model Artificial Network
- in order to distinguish it from much more primitive devices,
- which might be appropriate to describe spin glasses or
- whatever.
-
- As you can see, my view is that the Artificial Neural Network research
- is an engineering discipline detached from natural paradigmata,
- just as the whole AI. (As this is also crossposted to AI
- groups, I expect to have to put on my flame-proof suit.)
-
- :
- : Any comments, opinions or references in respect of the
- : above assertions would be most welcome.
- :
- :
- : Many thanks
- :
- : Paul Fawcett.
- :
- : University of Westminster
- :
- :
- : References.
- [deleted]
-
- --
- Ulf R. Andrick andrick@rhrk.uni-kl.de
- FB Biologie - Tierphysiologie
- Universitaet Was du nicht selber weiszt,
- D-W 6750 Kaiserslautern das muszt du dir erklaeren (Tegtmeier)
- --
- Ulf R. Andrick andrick@rhrk.uni-kl.de
- FB Biologie - Tierphysiologie
- Universitaet Was du nicht selber weiszt,
- D-W 6750 Kaiserslautern das muszt du dir erklaeren (Tegtmeier)
-