Now showing items 31-40 of 17596
Cluster and cluster galaxy evolution history from IR to X-ray observations of the young cluster RX J1257.2+4738 at z=0.866
(EDP SCIENCES S A, 2009)
Context. The cosmic time around the z similar to 1 redshift range appears crucial in the cluster and galaxy evolution, since it is probably the epoch of the first mature galaxy clusters. Our knowledge of the properties of ...
The old open clusters Saurer A, B and C revisited
(Wiley Blackwell Publishing, Inc, 2003-11)
We report deep (V ≈ 24.0) VI CCD photometry of three fields centred in the regions of the old open clusters Saurer A, B and C. In the case of Saurer A, which is considered one of the oldest known open clusters, we also ...
Cluster industrial: as tipologias, estratégias e governança na cadeia produtiva de calçados de Franca
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-graduação em Engenharia de Produção, 2013-12-16)
The analysis of an industrial cluster has become the main discussion to explain the firm agglomerations success worldwide in the last decade. This discussion has given a bigger dimension in economic terms, especially about ...
Clusterings Hierárquicos em Networks e Aplicações
(Universidade Estadual Paulista (UNESP), 2019-02-18)
Neste trabalho estudamos networks e métodos de Clustering Hierárquico de forma axiomática. Apresentamos alguns programas na linguagem Python aplicados à análise de dados de migração populacional, com o intuito de ilustrar ...
Quality indices for (practical) clustering evaluation
(IOS PRESS, 2009)
Clustering quality or validation indices allow the evaluation of the quality of clustering in order to support the selection of a specific partition or clustering structure in its natural unsupervised environment, where ...
Automatic aspect discrimination in data clustering
(ELSEVIER SCI LTDOXFORD, 2012)
The attributes describing a data set may often be arranged in meaningful subsets, each of which corresponds to a different aspect of the data. An unsupervised algorithm (SCAD) that simultaneously performs fuzzy clustering ...
Probing the electronic delocalization in a cyclic pyrazine ruthenium cluster hexamer
(ELSEVIER SCIENCE BV, 2010)
[Ru(3)O(CH(3)COO)(6)(pz)(CO)](6) is a cyclic hexamer species encompassing six triangular ruthenium cluster centers bridged by pyrazine ligands. The electronic communication among the cluster units strongly depends on their ...
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