Dear Giuseppe, Igor, Stan:
It seems to me that Both, top-down
AND bottom-up are Essential to life:
Top-down is the Individual / Individuation way,
the way of embryogenesis, parthenogenesis.
But bottom-up is way of Sex, the way of
re-assembling and re-combining genes.
It happens in a ``organized'' form in
mitosis meioses at pluricellular life forms,
but also in simple bacteria exchanging
pieces of DNA or RNA.
Bottom-up also appears at much higher
levels. This is how we have mitochondria!
-- Julio Stern (jstern@hotmail.com)
>From: Giuseppe Longo <Giuseppe.Longo@ens.fr>
>To: fis@listas.unizar.es
>Subject: [Fis] Robert Rosen's modeling paradigm
>Date: Thu, 26 Jan 2006 19:36:55 +0100
>
>with Igor Rojdestvenski's permission:
>
>On Wed, 25 Jan 2006, Igor Rojdestvenski wrote:
> > Dear Giuzeppe,
> >
> > I answer in private as my message limit for this week is over.
> >
> > 1. I kind of do not understand what is, in your opinion, bottom-up
and
> > top-down. I always viewes as follows:
> >
> > Top-down: a system that is built by design
> > Bottom-up: a system that develops as a result of creation and
recreation
>of
> > interactions between elements, i.e. self-organizing system.
>
>Top-down: it proceeds by DIFFERENTIATION, from a unity (one cell becomes
>several different ones, largely on the grounds of the geometric relative
>structuring - and more: embryogenesis)
>Bottom-up: put pieces together. Self? I rarely witnessed true
>self-organizing, bottom-up. Some active entity usually helps form outside.
>The first living entity? first let's try to understand the ongoing living
>processes, then try to unify to physical processes, yet to be understood
>(see
>below) and probably not in terms of current physical theories.
>
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Received on Sun Jan 29 19:05:19 2006
