منابع مشابه
Imaginary Worlds
Leaders today seem to be suffering from what might be called a failure of the imagination. We seem to be continually finding ourselves in situations where the leaders say something like “no one could have imagined that this would happen.” For example: Who could imagined that Hurricane Katrina would breach the levies in New Orleans; who could have imagined that an insurgency would arise from the...
متن کاملCompetition with evolution in ecology and finance
A variant of the multi-species Lotka–Volterra model is studied in which species competing for fixed finite resources are replaced by new randomly chosen species whenever they become extinct. The model exhibits chaos, punctuated equilibria, leptokurtosis, and self-organized criticality. It has application to ecology, finance, and possibly other diverse systems. 2004 Elsevier B.V. All rights re...
متن کاملBig questions, small worlds: microbial model systems in ecology.
Although many biologists have embraced microbial model systems as tools to address genetic and physiological questions, the explicit use of microbial communities as model systems in ecology has traditionally been more restricted. Here, we highlight recent studies that use laboratory-based microbial model systems to address ecological questions. Such studies have significantly advanced our under...
متن کامل[Mechanisms of indeterminacy between the imaginary and the rational worlds in schizophrenic subjects].
INTRODUCTION Our investigation into dream and delirium in schizophrenic subjects was based on the notion of magical thought developed by Sami-Ali. Starting from this notion, we attempted to determine whether they somehow differentiate the psychic space of dream from that of delirium, whether either of these two spaces, or both, are caught in a relational deadlock, and eventually to analyse the ...
متن کاملPlant Growth – Stoichiometry and Competition Theory Development in Ecosystem Ecology
Knecht Billberger, M. F. Plant growth – stoichiometry and competition. Doctor’s dissertation. ISSN 1652-6880, ISBN 91-576-7073-0. In four different studies, this thesis addresses issues concerning plant nutrition and growth from a theoretical perspective. Terrestrial plants require nutrients, water, light and space for their existence. All of these resources may be limiting for growth, however ...
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ژورنال
عنوان ژورنال: Nature
سال: 1985
ISSN: 0028-0836,1476-4687
DOI: 10.1038/314228b0