Spatial distribution patterns and their relations with environmental factors at different scales were identified in ca. 100-ha grassland under cattle and sheep grazing, in Eldorado do Sul, RS, Brazil (30 degrees 05'S, 51 degrees 40'W). The field survey used 138 0.5 x 0.5 m quadrats located systematically on transects along relief gradients. The quadrats were arranged in groups of 3 contiguous q...

*Serguei V. Koptsik, and Faculty of Physics, Moscow State University, Moscow 119899, Russia; Galina N. Koptsik, Soil Science Faculty, Moscow State University, Moscow 119899, Russia. *Corresponding author:mailto:[email protected] ABSTRACT Soil chemistry is analysed in terrestrial ecosystems subjected to airborne pollution in the fragile boreal environment in the industrial part of the Kol...

DOI 10.1007/978-94-007-0680-4_1, © Springer Science+Business Media B.V. 2011 Abstract Analysis of paleocommunity data poses a challenge because of its multivariate nature, containing counts of many species in many samples. Comparison of the abundance of a single species among all samples provides only incomplete information, whereas attempting to consider every species is impractical. Ordinatio...

Computer based information management introduces new possibilities and puts partly new requirements on information and classification systems. The rapid develop-ment and dissemination of information technology within the construction sector demands international co-ordination of standards and classification systems. This paper presents the preliminary results of a study of the product model cla...

Computer based information management introduces new possibilities and puts partly new requirements on information and classification systems. The rapid develop-ment and dissemination of information technology within the construction sector demands international co-ordination of standards and classification systems. This paper presents the preliminary results of a study of the product model cla...

Organisations can be defined as a set of entities regulated by mechanisms of social order and created by more or less autonomous actors to achieve common goals. Multi-agent systems are a natural choice to design organisational systems due to the proactive and autonomous behaviour of agents. However, in business environments it is necessary to consider the behaviour of the global system and the ...

In Distributed Problem-solving systems a group of purposefully designed computational agents interact and co-ordinate their activities so as to jointly achieve a global task. Social co-ordination is a decentralised mechanism, that sets out from autonomous, non-benevolent agents that interact primarily to improve the degree of attainment of their local goals. One way of ensuring the effectivenes...

A key problem for models of joint action is to explain how co-ordination is established and sustained. Existing accounts emphasize the importance of interaction, demonstrating how collaborative feedback leads to more systematized, stable, and partner-specific referring conventions. However, in addition to conventionalizing referring expressions, recent work demonstrates how interlocutors also r...