996 resultados para Dados não regularmente amostrados


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Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This article aims to discuss the role of digital technology in the process of collecting and analyzing data in qualitative research. We present two qualitative studies, with different objectives and contexts, that illustrate how data can be collected using different media and how they may shape the researcher's analysis and the results. Based on a theoretical perspective in which knowledge is seen as being produced by a collective of humans-with-media, as opposed to an individual or collective of humans, we believe that the technology used to produce knowledge and to analyze the data conditions the findings. Thus, technologies play a key role in doing research and the scientific knowledge generated from it.

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For constituting itself a science, Psychology has coursed along way. From the time he was considered a Philosophy’s discipline until to be recognized as a legitimate science, Psychology had to devoteto the definition of its object of study, the development and refinement of theoretical-methodological frameworks and, in particular, to consolidation process of their research strategies and knowledge construction. Therefore, in order to regard the demands of the classical scientific paradigm, which is very influenced by Positivism, Psychology made use, initially, of quantitative methodology and laboratory research. This article presents some of the process of identity construction of Psychology as a science, focusing on its transition path between the quantitativist paradigm of scientific knowledge production to the qualitativist paradigm, until that is more commonly practiced nowadays: the collaborative use of these methodological strategies. For presenting the qualitative researching Psychology, we discussed, beyond its proposal and differentiation elements in relation to quantitative research, the different methods used for this mode and, in particular, the interview - which is considered the main way of data collection in surveys conducted by psychologists and, therefore, it is an important element the process of knowledge building that science, in addition to being the most qualified space for dialogue between there searcher and the research subject.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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The investigative practice as science teaching activity is recognized as an alternative to the learning improvement of science, becoming a perspective of work for teachers. This article arose from a study about the teachers formation process in the scope of investigative practices, conducted with trainee teachers of the Science Club of the Federal University of Pará - UFPA and students of basic education in public schools in Belém city, in order to discuss the theoretical-practical relationship in the planning of an investigative activity. In this process, some episodes indicate the necessity of such relationship, because in its absence the planning process shows itself to be questionable. Our analysis shows the importance of considering the theoretical context to conceive the planning and decisions regarding the conduction of the investigative practices, and oriented to a theoretical or practical goal.

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Greenhouse with natural ventilation is widely used in tropical countries, and little knowledge is available about how this type of structure affects the spatial variability of agroclimatic variables. The aim of this study was to analyse the spatial variability of relative humidity inside a greenhouse with natural ventilation. The measurement of relative humidity was done at 114 points inside the greenhouse at 9, 12 and 16 hours and on heights of 0.3, 1.2 and 2.0 m. The acquired data were processed by the geostatistical software GS+ and maps were generated and displayed for each time and height using the Surfer 10.3.705 software. The results showed that there were variations in the spatial distribution of relative humidity inside the greenhouse.

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Early studies involving childhood autism attributed to family involvement in impairment of psycho-emotional development of the child. The purpose of this study was to review the literature related to autism and family in two national databases (Theses Database of Capes and Scientific Electronic Library Online) without defining a specific period as well as identify the main thematic focused. Were located 29 studies in Theses Database of Capes, the first record in 1990 and 12 in Scientific Electronic Library Online, the first publication in 2001. The results were grouped into seven categories. The categories “Quality of Life” and “Family Relations” concentrate most of publications on Theses Database. Already in Scientific Electronic Library Online, mostly refers to the “Family Relations” and “literature review”. It was found that none of theses or dissertations was published in scientific paper format, hampering the dissemination of research in the area.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Neste artigo é apresentada uma abordagem para aumentar a eficácia das Redes Neurais Artificiais de Funções de Base Radial utilizando um algoritmo de agrupamento de dados via Floresta de Caminhos Ótimos. Algumas técnicas comumente empregadas para essa tarefa, como o conhecido k-médias, requerem um determinado número de classes/agrupamentos prévio à sua execução. Embora o número de classes seja conhecido em problemas supervisionados, o número real de agrupamentos é difícil de ser encontrado, dado que uma classe pode ser representada por mais de um agrupamento. Experimentos em nove bases de dados, em conjunto com análises estatísticas, demonstraram que o classificador por Floresta de Caminhos Ótimos possui um melhor desempenho que a técnica k-médias, bem como encontra as médias das distribuições Gaussianas em posições muito similares às encontradas por este último. Entretanto, o classificador por Floresta de Caminhos Ótimos possui um custo computacional maior, dado que a sua etapa de treinamento é mais custosa que a da técnica k-médias.

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Pós-graduação em Genética e Melhoramento Animal - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia Mecânica - FEG