Evolution Research - Evomech Forum Posts

Heylighen F. (1989): "Self-Organization, Emergence and the Architecture of Complexity", in:
Proceedings of the 1st European Conference on System Science, (AFCET, Paris), p. 23-32.

Abstract:

It is argued that the problems of emergence and the architecture of complexity can be solved by analysing the self-organizing evolution of complex systems. A generalized, distributed variation selection model is proposed, in which internal and external aspects of selection and variation are contrasted. "Relational closure" is introduced as an internal selection criterion. A possible application of the theory in the form of a pattern directed computer system for supporting complex problem-solving is sketched.

Full text at:

http://pespmc1.vub.ac.be/Papers/SelfArchCom.pdf

John Latter

Evolution: Research Blog | Website | Blog Mad | Webring

technorati tags: self-organization, complexity, evolution

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On 19/03/2006 johnhewitt22 wrote:
> Dear All,
>
> I have never seen this book, by Phillip E. Johnson, but I have to say
> that, at a cursory reading, it seems rather good.
>
> Perhaps we could have an update on the author. Who is he? What is the
> backgound of the e-book?
>
> Sincerely
>
> John Hewitt

Hi John,

The last I heard of Johnson he was an IDist law professor at Berkeley. Here are a couple of links:

"Welcome. This page presents Professor Johnson's works, primarily
in the area of origins. On this page, you will also find his speaking schedule."
http://www.origins.org/pjohnson/pjohnson.html

"Articles by Phillip Johnson"
http://www.arn.org/authors/johnson_articles.html

I first came across Johnson in my search for more information about Grasse:

"MY STARTING POINT is a book review that Theodosius Dobzhansky published in 1975, critiquing Pierre Grasse's The Evolution of Life.{1} Grasse, an eminent French zoologist, believed in something that he called "evolution." So did Dobzhansky, but when Dobzhansky used that term he meant neo-Darwinism, evolution propelled by random mutation and guided by natural selection. Grasse used the same term to refer to something very different, a poorly understood process of transformation in which one general category (like reptiles) gave rise to another (like mammals), guided by mysterious "internal factors" that seemed to compel many individual lines of descent to converge at a new form of life."

From "Darwin's Rules of Reasoning" at:
http://www.leaderu.com/orgs/fte/darwinism/chapter1.html

Hope this helps!

John Latter

-- 

Evolution: Research Blog | Website | Blog Mad | Webring

technorati tags: internal+factors, natural+selection, random+mutations, grasse, johnson, berkeley, dna, dobzhansky, evolution

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Dear All,

I have never seen this book, by Phillip E. Johnson, but I have to say
that, at a cursory reading, it seems rather good.

Perhaps we could have an update on the author. Who is he? What is the
backgound of the e-book?

Sincerely

John Hewitt

Please Note: If you are reading this in a Blog then replying directly to this message (as opposed to making a 'blog comment') requires membership of the 'Evolution: Where Darwin meets Lamarck?' Egroup at:
http://groups.yahoo.com/group/evomech/

Genetics, Vol. 163, 1483-1496, April 2003, Copyright 2003
Regulating General Mutation Rates: Examination of the Hypermutable State Model for Cairnsian Adaptive Mutation
John R. Rotha, Eric Kofoid, Frederick P. Roth, Otto G. Bergc, Jon Segera, and Dan I. Andersson

Abstract:

In the lac adaptive mutation system of Cairns, selected mutant colonies but not unselected mutant types appear to arise from a nongrowing population of Escherichia coli. The general mutagenesis suffered by the selected mutants has been interpreted as support for the idea that E. coli possesses an evolved (and therefore beneficial) mechanism that increases the mutation rate in response to stress (the hypermutable state model, HSM). This mechanism is proposed to allow faster genetic adaptation to stressful conditions and to explain why mutations appear directed to useful sites. Analysis of the HSM reveals that it requires implausibly intense mutagenesis (105 times the unselected rate) and even then cannot account for the behavior of the Cairns system. The assumptions of the HSM predict that selected revertants will carry an average of eight deleterious null mutations and thus seem unlikely to be successful in long-term evolution. The experimentally observed 35-fold increase in the level of general mutagenesis cannot account for even one Lac+ revertant from a mutagenized subpopulation of 105 cells (the number proposed to enter the hypermutable state). We conclude that temporary general mutagenesis during stress is unlikely to provide a long-term selective advantage in this or any similar genetic system.

Full text at:

http://www.genetics.org/cgi/content/full/163/4/1483

John Latter

technorati tags: adaptive, cairns, mechanism, e.coli

Evolution: Research Blog | Website | Blog Mad | Webring

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