929 resultados para Monotone And Semi-monotone Operators


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We study the potential effects of anomalous couplings of the third generation quarks to gauge bosons in rare B decays. We focus on the constraints from flavor changing neutral current processes such as b→sγ and b →sl+l-. We consider both dimension-four and dimension-five operators and show that the latter can give large deviations from the standard model in the still unobserved dilepton modes, even after the bounds from b→sγ and precision electroweak observables are taken into account. ©2000 The American Physical Society.

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Pós-graduação em Enfermagem - FMB

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Educação - IBRC

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Pós-graduação em Educação - IBRC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Docência para a Educação Básica - FC

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The lack of interest and motivation, and the self-exclusion from Physical Education classes by Secondary and High School students is pointed out in the specific literature as a pedagogical problem for that discipline. Most studies dealing with the issue present only descriptive data, gathered from the quantification of responses given by students to questionnaires, and they lack a more consistent theoretical framework for both the generation of data as to its interpretation. The objectives of this article are: (i) to present an overview of published studies that address the perspectives of students in relation to their Physical Education classes at school, in terms of attitudes, opinions, tastes, motivation, and development; and (ii) to propose theoretical foundation and methodological guidelines for one future field based research that allows better understanding on how Secondary and High School students’ relationship to school Physical Education knowledge occurs, in order to contribute for advances regarding the results and conclusions on such thematics. We suggest that the definition of the research problem, the generation and interpretation of the data must take as reference the "theory of the notion of the relationship to knowledge", by Bernard Charlot, for whom the school knowledge must be understood in its relations with learning beings. The methodological direction should be guided by "qualitative research" general parameters in Education, using questionnaires and semi-structured interviews with students. Hopefully, in this way, indicators informed by research might contribute to improving the quality of teaching in lessons, in order to provide the students with opportunities for meaningful learning.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Docência para a Educação Básica - FC