Similar Search Results

Dynamics of a Simple Evolutionary Process

Stauffer, Dietrich; Newman, M. E. J. - Santa Fe Institute - 2001

We study the simple evolutionary process in which we repeatedly find the least fit agent in a population of agents and give it a new fitness which is chosen independently at random from a specified distribution. We show that many of the average properties of this process can be calculated...

Persistent link: https://www.econbiz.de/10005260362

A Theory of Biochemical Organization, Metabolic Pathways, and Evolution

Morowitz, Harold J. - Santa Fe Institute - 1996

Biogenesis and Evolution are viewed from the perspective of the universality of the metabolic chart with respect to … the evolution of the universal ancestor through hierarchical networks of chemical reactions. …

Persistent link: https://www.econbiz.de/10005790636

How the Immune System Generates Diversity: Pathogen Space Coverage with Random and Evolved Antibody Libraries

Oprea, Mihaela; Forrest, Stephanie - Santa Fe Institute - 1999

-pathogen matching rules, including the shape-space model. We use the genetic algorithm as a model of evolution to explore the behavior …

Persistent link: https://www.econbiz.de/10005790650

The Effects of Tag-Mediated Selection of Partners in Evolving Populations Playing the Iterated PrisonerÕs Dilemma

Riolo, Rick L. - Santa Fe Institute - 1997

A simple model of tag-mediated partner selection for agents playing the IPD is described. The agents strategies are represented as (i,q,q) triples as in [Nowak and May, 1992]. The tags are represented as arbitrary real numbers in [0,1], and tag selection is biased toward agents with similar...

Persistent link: https://www.econbiz.de/10005790705

Crashes, Recoveries, and 'Core-Shifts' in a Model of Evolving Networks

Jain, Sanjay; Krishna, Sandeep - Santa Fe Institute - 2001

A model of an evolving network of interacting molecular species is shown to exhibit repeated rounds of crashes in which several species get rapidly depopulated, followed by recoveries. The network inevitably self-organizes into an autocatalytic structure, which consists of an irreducible 'core'...

Persistent link: https://www.econbiz.de/10005790727

Visualizing Evolutionary Activity of Genotypes

Bedau, Mark A.; Brown, C. Titus - Santa Fe Institute - 1998

We introduce a method for visualizing evolutionary activity of genotypes. Following a proposal of Bedau and Packard[11], we define a genotype's evolutionary activity in terms of the history of its concentration in the evolving population. To visualize this evolutionary activity we graph the...

Persistent link: https://www.econbiz.de/10005790745

Genetic Plasiticity of V Genes Under Somatic Hypermutation: Statistical Analyses Using a New Resampling-Based Methodology

Oprea, Mihaela; Kepler, Thomas B. - Santa Fe Institute - 1999

Evidence for somatic hypermutation of immunoglobulin genes has been observed in all the species in which immunoglobulins have been found. Previous studies have suggested that codon usage in Ig V genes is such that the sequence-specificity of somatic hypermutation results in greater mutability in...

Persistent link: https://www.econbiz.de/10005790792

Large Extinctions in an Evolutionary Model: The Role of Innovation and Keystone Species

Jain, Sanjay; Krishna, Sandeep - Santa Fe Institute - 2001

The causes of major and rapid transitions observed in biological macroevolution as well as in the evolution of social …

Persistent link: https://www.econbiz.de/10005790796

A Model of Large-Scale Proteome Evolution

Solé, Ricard V.; Pastor-Satorras, Romualdo; Smith, Eric D. - Santa Fe Institute - 2001

proteome evolution that is able to reproduce many of the observed statistical regularities reported from the analysis of the …

Persistent link: https://www.econbiz.de/10005790811

Can Evolution Explain How the Mind Works? A Review of the Evolutionary Psychology Debates

Mitchell, Melanie - Santa Fe Institute - 1998

"Nothing in biology makes sense except in the light of evolution." It would be hard to find a biologist today who … disagrees with geneticist Theodosius Dobzhansky's famous claim. Darwin's theory of evolution via natural selection has done more … and among those found in the fossil record. <p> If nothing in biology makes sense without evolution, the same should be …

Persistent link: https://www.econbiz.de/10005790814