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januari 21, 2004
Senaste Complexity Digest
Veckans Complexity Digest innehåller bland annat länkar till nedanstående:
Debashish Chowdhury, Katsuhiro Nishinari, Andreas Schadschneider: Self-organized patterns and traffic flow in colonies of organisms: from bacteria and social insects to vertebrates
Abstract:
Flocks of birds and schools of fish are familiar examples of spatial patterns formed by living organisms. In contrast to the patterns on the skins of, say, zebra and giraffe, the patterns of our interest are {\it transient} although different patterns change over different time scales. The aesthetic beauty of these patterns have attracted the attentions of poets and philosophers for centuries. Scientists from various disciplines, however, are in search of common underlying principles that give rise to the transient patterns in colonies of organisms. Such patterns are observed not only in colonies of organisms as simple as single-cell bacteria, as interesting as social insects like ants and termites as well as in colonies of vertebrates as complex as birds and fish but also in human societies. In recent years, particularly over the last one decade, physicists have utilized the conceptual framework as well as the methodological toolbox of statistical mechanics to unravel the mystery of these patterns. In this article we present an overview emphasizing the common trends that rely on theoretical modelling of these systems using the so-called agent-based Lagrangian approach.
NewScientist.com: Puzzled monkeys reveal key language step:
The key cognitive step that allowed humans to become the only animals using language may have been identified, scientists say.
A new study on monkeys found that while they are able to understand basic rules about word patterns, they are not able to follow more complex rules that underpin the crucial next stage of language structure.
NewScientist.com: Disgust is good for you, shows study
The purpose of disgust has been quantitatively demonstrated for the first time - it is an evolved response that protects people from disease or harm.
Posted by hakank at januari 21, 2004 06:36 EM Posted to Komplexitet/emergens