795 resultados para Empirical study
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Geografia - IGCE
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Pós-graduação em Geografia - IGCE
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Ciência da Computação - IBILCE
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Pós-graduação em Ciências Sociais - FFC
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Geografia - FCT
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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O trabalho analisa a consistência entre os objetivos normativos, expressos na legislação que possibilita a concessão de incentivos fiscais no estado do Pará, e os resultados da aplicação desta prática de exceção fiscal a firmas da agroindústria de palmito. Inicialmente, a partir da elaboração de indicadores, por meio de análise espacial de dados e da avaliação dos níveis de correlação estatística entre eles, o trabalho concluiu que não há evidências empíricas de que o crescimento da agroindústria do palmito se articule com os objetivos normativos da política de incentivos fiscais. Em seguida, foi feita uma avaliação microeconômica, por meio de 18 indicadores, dos efeitos do incentivo fiscal sobre o desempenho das firmas, que apontou melhoras em todos os indicadores. O trabalho conclui, adicionalmente, que as taxas de rentabilidade e as de retorno interno da agroindústria do palmito, mesmo antes da concessão de incentivo fiscal, eram superiores a outras possibilidades de alocação de capital, contrariando também justificativas normativas subjacentes à concessão de incentivos fiscais. Por fim, indica-se que a concessão de benefícios analisada não se coaduna com o que a literatura considera como uma política de incentivos fiscais, já que os resultados dela, nas firmas analisadas, aproximam-lhe de uma política de regularização fiscal.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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The use of wireless local area networks, called WLANs, as well as the proliferation of the use of multimedia applications have grown rapidly in recent years. Some factors affect the quality of service (QoS) received by the user and interference is one of them. This work presents strategies for planning and performance evaluation through an empirical study of the QoS parameters of a voice over Internet Protocol (VoIP) application in an interference network, as well as the relevance in the design of wireless networks to determine the coverage area of an access point, taking into account several parameters such as power, jitter, packet loss, delay, and PMOS. Another strategy is based on a hybrid approach that considers measuring and Bayesian inference applied to wireless networks, taking into consideration QoS parameters. The models take into account a cross layer vision of networks, correlating aspects of the physical environment, on the signal propagation (power or distance) with aspects of VoIP applications (e.g., jitter and packet loss). Case studies were carried out for two indoor environments and two outdoor environments, one of them displaying main characteristics of the Amazon region (e.g., densely arboreous environments). This last test bed was carried out in a real system because the Government of the State of Pará has a digital inclusion program called NAVEGAPARÁ.
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The possibility of experimental approach of mental phenomena continues to be discussed nowadays by philosophers, psychologists and neuroscientists. According to the concept that mental phenomena are resulting from brain activity, therefore organic phenomena, the objective of this essay is to show that empirical study of mental phenomena, especially consciousness, is not only possible, but desirable, despite the limitations found in Neuroscience field.
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Researches show high rates of school failure on the part of students who are unable to learn, referring to them as the idea of an incapable individual and intended not to achieve the goals proposed during the school year. Among the most varied problems posed by teachers and that are instilled in students in order to justify the poor performance of the same, we find Disorder Attention Deficit Hyperactivity Disorder (ADHD). Faced with this problem the objective was to investigate teachers‟ conception of the second year of primary education on ADHD, knowing well the mechanisms of identification, confirmation and referral of these cases, as well as the appropriate treatment and teaching practices suggested. To achieve the proposed objective a literature search was performed supplemented by an empirical study in which we used two instruments to collect data: interviews and observation. The study included empirical two teachers from a state school and two teachers from a private school, all of a midsize city in São Paulo. The interviews showed that teachers of second grade of elementary school consider ADHD a neurological problem in order to be addressed, however, chose not to speak about the treatment carried out by drugs. The observations revealed that the discourse of these teachers are away from their practices, it is worth noting that the differences in these two situations studied - state and private network - are so disparate and interfere in this important teaching practice