879 resultados para Configuration spaces


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In the book Conceptual Spaces: the Geometry of Thought [2000] Peter Gärdenfors proposes a new framework for cognitive science. Complementary to symbolic and subsymbolic [connectionist] descriptions, conceptual spaces are semantic structures constructed from empirical data representing the universe of mental states. We argue that Gärdenfors' modeling can be used in consciousness research to describe the phenomenal conscious world, its elements and their intrinsic relations. The conceptual space approach affords the construction of a universal state space of human consciousness, where all possible kinds of human conscious states could be mapped. Starting from this approach, we discuss the inclusion of feelings and emotions in conceptual spaces, and their relation to perceptual and cognitive states. Current debate on integration of affect/emotion and perception/cognition allows three possible descriptive alternatives: emotion resulting from basic cognition; cognition resulting from basic emotion, and both as relatively independent functions integrated by brain mechanisms. Finding a solution for this issue is an important step in any attempt of successful modeling of natural or artificial consciousness. After making a brief review of proposals in this area, we summarize the essentials of a new model of consciousness based on neuro-astroglial interactions. © 2011 World Scientific Publishing Company.

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Increased urbanization typically leads to an increase in abundance of a few species and a reduction in bird species richness. Understanding the structure of biotic communities in urban areas will allow us to propose management techniques and to decrease conflicts between wild species and human beings. The objective of this study was to describe the structure of the bird community in an urban ecosystem. The study was carried out in the city of Taubaté in southeastern Brazil. Point-counts were established in areas with different levels of tree density ranging from urban green spaces to predominantly built-up areas. We looked for a correlation between the richness/abundance of birds and the size of the area surveyed, the number of houses, the number of tree species and the number of individual trees. The results of multiple regression showed that bird richness had a direct relationship with vegetation complexity. The abundance and diversity of tree species were better predictors of bird species than the number of houses and size of the area surveyed. We discuss implications of this study for conservation and management of bird diversity in urban areas, such as the need to increase green areas containing a large diversity of native plant species. © 2011 Springer Science+Business Media, LLC.

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Catalytically inactive phospholipase A2 (PLA2) homologues play key roles in the pathogenesis induced by snake envenomation, causing extensive tissue damage via a mechanism still unknown. Although, the amino acid residues directly involved in catalysis are conserved, the substitution of Asp49 by Arg/Lys/Gln or Ser prevents the binding of the essential calcium ion and hence these proteins are incapable of hydrolyzing phospholipids. In this work, the crystal structure of a Lys49-PLA2 homologue from Bothrops brazili (MTX-II) was solved in two conformational states: (a) native, with Lys49 singly coordinated by the backbone oxygen atom of Val31 and (b) complexed with tetraethylene glycol (TTEG). Interestingly, the TTEG molecule was observed in two different coordination cages depending on the orientation of the nominal calcium-binding loop and of the residue Lys49. These structural observations indicate a direct role for the residue Lys49 in the functioning of a catalytically inactive PLA2 homologue suggesting a contribution of the active site-like region in the expression of pharmacological effects such as myotoxicity and edema formation. Despite the several crystal structures of Lys49-PLA2 homologues already determined, their biological assembly remains controversial with two possible conformations. The extended dimer with the hydrophobic channel exposed to the solvent and the compact dimer in which the active site-like region is occluded by the dimeric interface. In the MTX-II crystal packing analysis was found only the extended dimer as a possible stable quaternary arrangement. © 2012 Elsevier B.V.

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In this paper, we show a local-in-time existence result for the 3D micropolar fluid system in the framework of Besov-Morrey spaces. The initial data class is larger than the previous ones and contains strongly singular functions and measures. © 2013 Springer Basel.

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Constrained intervals, intervals as a mapping from [0, 1] to polynomials of degree one (linear functions) with non-negative slopes, and arithmetic on constrained intervals generate a space that turns out to be a cancellative abelian monoid albeit with a richer set of properties than the usual (standard) space of interval arithmetic. This means that not only do we have the classical embedding as developed by H. Radström, S. Markov, and the extension of E. Kaucher but the properties of these polynomials. We study the geometry of the embedding of intervals into a quasilinear space and some of the properties of the mapping of constrained intervals into a space of polynomials. It is assumed that the reader is familiar with the basic notions of interval arithmetic and interval analysis. © 2013 Springer-Verlag Berlin Heidelberg.

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Pós-graduação em Comunicação - FAAC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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This text assumes for present and understand how the books are arranged in different physical spaces, inside the classroom, and how are they perceived by teachers and students, by regulating actions and performances of the subjects. To this end, a field research, from the collection of different images of the school environments in which the books are exposed. The analysis of the images if the theoretical concepts behind about space to articulate the idea of Rodriguez, school culture, the perception of Vidal and school material culture of Viñao Frago and Escolano Benito. Upon reflection, in the design of materiality of the book and, according to Chartier. The observations of the images indicate actions of spreading a school environment of interaction with the book, characterized now by the mobility of physical space, now determined by the need for visibility and demarcation of a normal space, in order to prioritize access to the books and the taming of the reader.

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Foreword by Alicia Bárcena and Jorge Valdez

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Pós-graduação em Estudos Literários - FCLAR

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Este estudo sobre o processo de construção de políticas de inclusão social no projeto Escola Cabana e os consensos e tensionamentos entre os segmentos sociais e o poder público municipal procurou investigar e refletir se esse projeto possibilitou (ou não) a inclusão e participação dos segmentos sociais (Movimento das Mulheres, Homossexuais, Negros e dos PNEEs), bem como da contemplação de suas reivindicações e interesses no processo de formulação e elaboração de políticas públicas, a partir das análises de documentos oficiais e das falas de integrantes dos movimentos sociais e de dirigentes da educação municipal, no período de 1997 a 2000 e 2001 a 2004. Ele abrange uma discussão sobre as perspectivas de compreensão sobre exclusão e inclusão social, espaços públicos democratizados, participação popular e processos identitários, tendo como pano de fundo a abordagem do período de redemocratização do Brasil. Este trabalho contemplou ainda a relação entre os documentos produzidos pelo governo municipal sobre o projeto da Escola Cabana e os depoimentos dos entrevistados, estabelecendo uma série de variáveis que discriminam as motivações dos sujeitos da sociedade para o envolvimento com os segmentos sociais, bem como dos gestores do poder público com as entidades da sociedade civil, durante a construção do referido projeto. Verifica-se, a partir da pesquisa, que as políticas públicas materializadas em conseqüência das interações entre a administração municipal e os movimentos, mostraram articulações dos mais diferentes vieses, com evidências de bases consensuais, mas com intensos conflitos, tensionamentos e impasses. A discussão, aqui apresentada, enfatiza a relevância dessa experiência tanto para Belém quanto para outros municípios como oportunidade de viabilização, participação e utilização de espaços públicos por setores populares. Revela, ainda, que, apesar da possibilidade de ter criado alternativas, de caráter inovador, às propostas existentes que visam à eliminação de contextos de exclusão social e à configuração de processos de identidade, o projeto ficou comprometido pela inexperiência gestionária de alguns dirigentes, pela sua apropriação parcial por determinados setores sociais e pela sua informalidade legal.