939 resultados para Arranjos Institucionais


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Antenna arrays are able to provide high and controlled directivity, which are suitable for radiobase stations, radar systems, and point-to-point or satellite links. The optimization of an array design is usually a hard task because of the non-linear characteristic of multiobjective, requiring the application of numerical techniques, such as genetic algorithms. Therefore, in order to optimize the electronic control of the antenna array radiation pattem through genetic algorithms in real codification, it was developed a numerical tool which is able to positioning the array major lobe, reducing the side lobe levels, canceling interference signals in specific directions of arrival, and improving the antenna radiation performance. This was accomplished by using antenna theory concepts and optimization methods, mainly genetic algorithms ones, allowing to develop a numerical tool with creative genes codification and crossover rules, which is one of the most important contribution of this work. The efficiency of the developed genetic algorithm tool is tested and validated in several antenna and propagation applications. 11 was observed that the numerical results attend the specific requirements, showing the developed tool ability and capacity to handle the considered problems, as well as a great perspective for application in future works.

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This master dissertation introduces a study about some aspects that determine the aplication of adaptative arrays in DS-CDMA cellular systems. Some basics concepts and your evolution in the time about celular systems was detailed here, meanly the CDMA tecnique, specialy about spread-codes and funtionaly principies. Since this, the mobile radio enviroment, with your own caracteristcs, and the basics concepts about adaptive arrays, as powerfull spacial filter was aborded. Some adaptative algorithms was introduced too, these are integrants of the signals processing, and are answerable for weights update that influency directly in the radiation pattern of array. This study is based in a numerical analysis of adaptative array system behaviors related to the used antenna and array geometry types. All the simulations was done by Mathematica 4.0 software. The results for weights convergency, square mean error, gain, array pattern and supression capacity based the analisis made here, using RLS (supervisioned) and LSDRMTA (blind) algorithms.

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This dissertation presents a new proposal for the Direction of Arrival (DOA) detection problem for more than one signal inciding simultaneously on an antennas array with linear or planar geometry by using intelligent algorithms. The DOA estimator is developed by using techniques of Conventional Beam-forming (CBF), Blind Source Separation (BSS), and the neural estimator MRBF (Modular Structure of Radial Basis Functions). The developed MRBF estimator has its capacity extended due to the interaction with the BSS technique. The BSS makes an estimation of the steering vectors of the multiple plane waves that reach the array in the same frequency, that means, obtains to separate mixed signals without information a priori. The technique developed in this work makes possible to identify the multiple sources directions and to identify and to exclude interference sources

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Este trabalho teve como objetivo avaliar o depósito de calda pulverizada por dois tipos de pontas de pulverização sobre plantas de Salvinia auriculata dispostas em diferentes arranjos populacionais com plantas de Eichhornia crassipes e Pistia stratiotes. Um experimento foi conduzido em condições de caixas-d'água em delineamento inteiramente casualizado, com quatro repetições. Os tratamentos foram dispostos em esquema fatorial 2 x 8, sendo dois tipos de pontas de pulverização (ConeJet TXVK-8 e TeeJet DG 11002 VS) e oito proporções entre as plantas aquáticas, a saber: dominância total da área de cobertura da caixa-d'água pelas plantas de salvínia (100%); e as proporções entre plantas de salvínia e de aguapé ou alface-d'água a 75%:25%, 50%:50% e 25%:75%. Também foi utilizada uma densidade tripla, na qual as três espécies estiveram igualmente dispostas na proporção de 33%. Soluções dos corantes Amarelo Tartrasina FDC-5 a 3.500 ppm e Azul Brilhante FDC-1 a 1.000 ppm foram utilizadas como traçadores para as pontas TXVK-8 e DG 11002VS, respectivamente. A pulverização das soluções foi efetuada na mesma unidade experimental, com intervalo de 30 minutos entre si, com auxílio de um pulverizador costal pressurizado com CO2, calibrado de modo que proporcionasse volume de aplicação aproximado de 200 L ha-1. Não foram observadas diferenças estatísticas entre os tipos de pontas de pulverização nas diferentes proporções estudadas, exceto para depósitos totais de calda de pulverização nas plantas na condição de dominância total da salvínia, uma vez que a ponta ConeJet TXVK-8 foi superior à TeeJet DG 11002 VS. Os valores dos depósitos diminuíram com o aumento da proporção de plantas de aguapé na associação e foram na condição em que 25% de plantas de salvínia estiveram associadas a 75% de plantas de aguapé. A presença da espécie alface-d'água não influenciou a deposição de gotas sobre as folhas de salvínia.

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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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We seek consistency empirical and analytical rigor to the concept of touristification in the course of the contemporary arrangements of subjectivity and urbanity stations through a landscape of social (dis)encounters between residents and foreigners living in the capital of Rio Grande do Norte, Natal. In the last three decades the city has become a major destination country for national and international tourism, making tourism an important monitor of choreography in search of synchrony between cities and subjectivities, orchestrated by the cyclical crises and the relentless battle for systemic capitalistic expansion and survival. We proceed with an ethnographic and cartographic inspiration in Ponta Negra, where the waterfront redevelopment in 2000 conducted by the government, influenced the implementation of various establishments, services and practices related to the construction of Natal s major industry hub of tourism and entertainment. We proposed an arch-genealogy of touristification inspared on Michel Foucault analytical perspective, increased by authors in confluence or in different theoretical and methodological approaches, among which stand out Karl Marx, Gilles Deleuze and Felix Guattari, Michael Hardt and Antonio Negri. The reflections that initially turned to the advancement of the sphere of consumerism as the issue capable of articulating the developmental trajectory of the capitalist system and the practice of tourism, promoting some effects (un)desirable in the conflictual dynamics of the condition of the district of Ponta Negra, territory each again (re) produces the designs to meet the consumption by affluent portion of the population and foreign, encountering social exclusion and inclusion differentiated a growing trend. We go forward with an analysis of the "liberation of desire" phenomenal features of the process of producing subjective, providing a breakdown of the recent world s financial crisis initially, but proved social and political crisis also, through a plot derived from the operation of real estate speculation, which Natal is mainly caught through touristification, showing the outlines of a generalized crisis in establishing a new order buoyed by the emergence of a context "biopolitical" since it is a major route that uses the capital to survive and expand, while guiding the process of "strategic beautification" held in Ponta Negra, problematized by us. We conclude by assessing the appropriateness of proposing on further analysis to explore the establishment of a "new social ontology in terms of interference touristification ongoing and the constitution of a "new order" local/global, away from that characterize a system's capitalist overcoming, try to give emphasis in the current stage of the radicalization of a capitalistic utopia

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The Kangaroo Program was implemented in Brazil in 2000 through the Unified Health System (Sistema Único de Saúde SUS) sustained with a humanized rethoric of health care assistance. This program adopts the skin-to-skin contact contributing to the mother-infant bond, breastfeeding and promoting security in mother s care. The users of SUS are encouraged to live in the maternity ward to follow the baby health improvement. However, it was verified in previous observations that mothers participation in the Kangaroo Program has been done through an imposed practice. Therefore, this study intended to understand the texts that permeate the kangaroo practice. This research was developed through two studies: 1) an historic exploration of motherhood concept and an analysis of how the motherhood is presented in the official document that orients the program; 2) an analysis of institutional dynamic of Kangaroo Program, emphasizing the study about the health workers everyday practice, the mothers view about their life in the maternity wards, and the attendance practice. It is highlighted that the relation between this two studies allowed the comprehension abouthow the official discourses can influence the health workers behaviors and how their viewpoint and position can shape the everyday work in a public health program. This research, supported by Institutional Ethnography, considers that people s practices and experiences are socially organized and shaped by broad social forces. The discourse method was used in the documental analysis and in the analysis of qualitative data from empiric research. The research showed that the kangaroo program has been an excellent way to save resources and to improve some baby s biologic and psychological aspects. However, this program has failed to consider the social, economic and cultural complexity of mothers and the structural limitation of the health care system. The official document uses the economic and medical approach, following the hegemonic biomedical model and the life style of the people that don t use the public health system. Consequently, the program has not been successful because it is planned without people participation. On the other hand, it was verified that although some professionals are committed with their work, the mainly does not consider mothers participation as an active process, using the institutional power as a social control to keep mothers uninformed about the possibility to leave the maternity wards. As a result, the research also showed that mothers perceive the program as mandatory and not as option that can improve pleasure moments. It is, therefore, necessary to consider the complex social determinants of health that can increase mothers participation in the Kangaroo Program. Bringing these issues into debate can be a reflective exercise on citizenship and governance, allowing spaces for the improvement of public health programs

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This paper aims to analyze the current support structure ready to Local Productive Arrangements (APLs) in the state of Rio Grande do Norte. To this end, it was done a study of major theories dealing with territorial agglomerations: moving from the pioneering concept of Marshallian industrial district to neo-Schumpeterian concepts coming from the latest innovation systems. In a complementary way, there will be a study of the major reasons that brought the crowded productive activities to a central position in the economic debate and the formation of public policy, seeking to understand what the relationship of this phenomenon with the different approaches of regional development policies which are included in recent years. Finally, it sought to understand how the bodies responsible for supporting clusters in the state of Rio Grande do Norte act in the selection and support of these arrangements, analyzing what the main policies implemented and trying to understand what are the main instruments used to support these clusters in the state

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No Estado de São Paulo, existe uma rede extensiva de serviços de Atenção Básica (AB) com perfil organizacional heterogêneo e pouco conhecido. Este estudo objetiva caracterizar a organização dos serviços de AB em 37 municípios do Centro-oeste paulista, como primeira etapa de um projeto de avaliação da qualidade desses serviços. Trata-se de um estudo transversal conduzido mediante questionário estruturado, autorrespondido pelos gerentes e equipes locais, com questões que abordam características institucionais e de organização e gerência do trabalho. Esses questionários foram enviados para 131 UBS, distribuídas em 37 municípios. Obteve-se resposta de 113 unidades (87%) localizadas em 32 municípios (86,4%). do total de unidades, 57 (50%) são UBS tradicionais, 26 (22,8%), Unidades de Saúde da Família, e 31, (27,2%) organizadas segundo formas mistas. A maioria dos serviços (62%, 70/113) não trabalha com área de abrangência delimitada de modo planejado. Os serviços se polarizam entre aqueles que realizam entre 70 e 100% de consultas médicas agendadas (37,6%, 41/109), e aqueles que realizam entre 70 e 100% de não agendadas (39,4%, 43/109). Não possuem conselhos locais organizados 65 unidades (63,7%, 65/102). Os dados coletados permitem discutir as características dos principais programas, procedimentos e ações realizados pelos serviços. Os perfis organizacionais predominantes apontam a presença de deficiências de estrutura e processo em relação às diretrizes do SUS. O desenvolvimento de instrumentos de autoavaliação permite que as equipes se apropriem, de forma crítica, de seu trabalho, e possam elaborar novos arranjos tecnológicos para melhoria da qualidade.

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

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Mediante esta pesquisa, estudamos os arranjos configurados pela artéria celíaca em 30 patos domésticos Cairina moshata, sendo 20 machos e 10 fêmeas. Foi realizada a injeção de látex corado no sistema arterial e depois as peças foram fixadas em solução aquosa de formol a 10% para posterior dissecação dos vasos arteriais. A artéria celíaca nasce isoladamente da aorta descendente e fornece a artéria proventricular dorsal e a artéria esofágica e a seguir continua-se como tronco de dois outros ramos: esquerdo e direito. O ramo esquerdo emite um vaso que vasculariza a porção ventral do proventrículo (artéria proventricular ventral) e porção terminal do esôfago e, a seguir, fornece 3 ramos que vascularizam a face lateral esquerda e a margem cranial da moela ou ventrículo, bem como a junção pilórica na sua porção cranial. do vaso destinado à margem cranial da moela, surgem artérias ao lobo hepático esquerdo em número de 1 em 5 preparações (16,6% ± 6,8), 2 em 14 peças (46,66% ± 9,1) ou 3 em 8 peças (26,66% ± 8,1). O ramo direito envia inicialmente as artérias esplênicas cujo número foi de 2 em 6 preparações (20% ± 7,3), 3 em 12 peças (40% ± 8,9), 4 em 8 peças (26,6% ± 8,1), 5 em 3 peças (10% ± 5,5) e 6 em 1 preparação (3,33% ± 3,3). em seguida, emite colaterais ao lobo hepático direito que foram em número de 2 em 21 preparações (70% ± 8,4) ou 3 em 9 preparações (30% ± 8,4). Ainda, o ramo direito emite artérias endereçadas ao ceco esquerdo em número de 2 em 17 preparações (56,66% ± 9,1) ou 3 em 13 casos (43,33% ± 9,1). O ramo direito origina ainda 3 vasos endereçados à face lateral direita da moela (ventrículo), à margem caudal e à junção pilórica em sua porção mais caudal. A seguir, o ramo direito da artéria celíaca continua-se como artéria pancreaticoduodenal que supre o pâncreas e as porções ascendente e descendente do duodeno.