Metric Space
Mostrando 25-36 de 66 artigos, teses e dissertações.
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25. Dinâmica de uso das terras nos municípios de Bonito, Jardim e Bodoquena (MS) e o estado e conservação dos recursos biológicos do Parque Nacional da Serra da Bodoquena e de sua zona de amortecimento / Spatial and temporal dynamics of land use in Bonito, Jardim and Bodoquena (MS) Municipalities, and the conservation state of the biological resources in the Serra da Bodoquena National Park buffer zone
The research approached the process of use and occupation of lands in the cities of Bonito, Bodoquena and Jardim, situated in the edge east of the National Park of the Serra da Bodoquena (NPSB), southwestern region of Mato Grosso do Sul, Brazil. Moreover, the conservation state was studied, in terms of structure and configuration of the landscape, of the con
Publicado em: 2008
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26. Cálculo da elasticidade de cristais líquidos nemáticos através de métodos da geometria diferencial
Found on Frank free energy relation, the bulk elastic constants of the nematic liquid crystals are computed in this work through an approach based on the affine connection method. This consists in the deformation of the isotropic fluid sferical molecules until they acquire an elipsoidal shape, likely the estimated nematic molecules form. Herewith the method
Publicado em: 2007
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27. MFIS: algoritmo de reconhecimento e indexação em base de dados de impressões digitais em espaço métrico / MFIS: algorithm for the recognition and indexing in database of fingerprints in metric spaces
O problema dos métodos tradicionais de identificação de pessoas é que são baseados em senhas e assim podem ser esquecidas, roubadas, perdidas, copiadas, armazenadas de maneira insegura e até utilizadas por uma pessoa que não tenha autorização. Os sistemas biométricos automáticos surgiram para oferecer uma alternativa para o reconhecimento de pesso
Publicado em: 2007
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28. Population structure of Eupemphix nattereri (Amphibia, Anura, Leiuperidae) from Central Brazil
This study reports on 156 specimens of the amphibian Eupemphix nattereri, a widely distributed leiuperid, obtained from 11 municipalities of central Brazil. The extent of genetic variation was quantified by determining the mean number of alleles per locus and the proportion of polymorphic loci. An analysis of molecular variance (AMOVA) was performed on the r
Genetics and Molecular Biology. Publicado em: 2007
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29. CUICA - uma ferramenta para suportar a convergência da TV digital com a WEB através da criação de conteúdo digital
A collaborative virtual environment can be dened as a single virtual reality space hared by multiple participants connected from diferent hosts. However, most collaborative existing systems restrict the communication among the participants to text messages or audio communication. The natural means of human communication are richer than this. Other efects of
Publicado em: 2007
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30. Modeling polycrystals with regular polyhedra
Polycrystalline structure is of paramount importance to materials science and engineering. It provides an important example of a space-filling irregular network structure that also occurs in foams as well as in certain biological tissues. Therefore, seeking an accurate description of the characteristics of polycrystals is of fundamental importance. Recently,
Materials Research. Publicado em: 2006-06
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31. Space isotropy and weak equivalence principle in a scalar theory of gravity
We consider a preferred-frame bimetric theory in which the scalar gravitational field both influences the metric and has direct dynamical effects. A modified version ("v2") is built, by assuming now a locally-isotropic dilation of physically measured distances, as compared with distances evaluated with the Euclidean space metric. The dynamical equations stay
Brazilian Journal of Physics. Publicado em: 2006-03
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32. Mapeamento de ambientes estruturados com extração de informações geométricas através de dados sensoriais
The objective of this thesis is proposes a method for a mobile robot to build a hybrid map of an indoor, semi-structured environment. The topological part of this map deals with spatial relationships among rooms and corridors. It is a topology-based map, where the edges of the graph are rooms or corridors, and each link between two distinct edges rep
Publicado em: 2006
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33. Models of disks and other self-gravitating structures in general relativity / Modelos de discos e outras estruturas auto-gravitantes em relatividade geral
Exact solutions of Einstein field equations that represent space-times with disklike matter distributions are constructed using the inverse method (image method). These solutions include static thin perfect uid disks with and without halos, static thin charged perfect uid disks and models of thin charged dust disks. New solutions in various coordinate system
Publicado em: 2006
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34. The reconstruction of color spaces: type 2 diabetes and mercury vapour intoxication / Reconstrução do espaço de cores de pacientes com discromatopsia adquirida: diabéticos tipo 2 e intoxicados por vapor de mercúrio
Purpose. Color vision was examined in two groups of patients, one group with diabetes mellitus type 2 (DM2) without retinopathy (n=32) and a second group with chronic exposure to mercury vapour (Hg) (n=18), as well as in the respective age-matched controls (n=23; n=18) in order to reconstruct their color spaces. We assessed the type and degree of distortions
Publicado em: 2006
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35. Gödel's universe and induced-matter theory
We discuss Gödel's universe in the context of the induced-matter theory. We show that the problem of generating Gödel's metric from an extra dimension is equivalent to finding an embedding of Gödel's universe in a Ricci-flat five-dimensional space. On the other hand, according to the Campbell-Magaard theorem, any spacetime can be locally embedded into a f
Brazilian Journal of Physics. Publicado em: 2005-12
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36. Neutrino mixing as a source for cosmological constant
We report on recent results showing that neutrino mixing may lead to a non-zero contribution to the cosmological constant. This contribution is of a completely different nature with respect to the usual one by a massive spinor field. We also study the problem of field mixing in Quantum Field Theory in curved space-time, for the case of a scalar field in the
Brazilian Journal of Physics. Publicado em: 2005-06