Comments on: PNAS: Leadership, collective behavior, and the evolution of migration

By: Elaine Dudley

Elaine Dudley — Fri, 06 Jan 2012 15:49:48 +0000

So-called environmentally induced migration is multi-level problem. According to Essam El-Hinnawi definition form 1985 environmental refugees as those people who have been forced to leave their traditional habitat, temporarily or permanently, because of a marked environmental disruption (natural or triggered by people) that jeopardised their existence and/or seriously affected the quality of their life. The fundamental distinction between `environmental migrants` and `environmental refugees` is a standpoint of contemporsry studies in EDPs.
According to Bogumil Terminski it seems reasonable to distinguish the general category of environmental migrants from the more specific (subordinate to it) category of environmental refugees.
Environmental migrants, therefore, are persons making a short-lived, cyclical, or longerterm change of residence, of a voluntary or forced character, due to specific environmental factors. Environmental refugees form a specific type of environmental migrant.
Environmental refugees, therefore, are persons compelled to spontaneous, short-lived, cyclical, or longer-term changes of residence due to sudden or gradually worsening changes in environmental factors important to their living, which may be of either a short-term or an irreversible character.

By: Pesquisa mostra como a ignorância pode favorecer a democracia | O Brasileirinho

Fri, 16 Dec 2011 11:35:06 +0000

[...] professor Ian Couzin, do Departamento de Ecologia e Biologia Evolutiva, Princeton University EUA, perguntou para si [...]

By: ramesh

ramesh — Fri, 29 Apr 2011 15:53:28 +0000

This is a wonderful field of group dynamics and interaction. My fascination has been in extrapolating the model to biological entities like Immunoglobulin molecules and their environment (read antigen) sensitivity while in circulation and ex-vivo. the therapeutic differences between Intravenous Immunoglobulin and purified monoclonal antibodies has more than a dose response difference . the self sensitivity (social group) and antigenic specificity (environmental cost) of the different Ig groups is an unexplored and fascinating avenue of medical (group) investigative thought