752 resultados para Painéis de fachada prefabricados


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Pós-graduação em Ginecologia, Obstetrícia e Mastologia - FMB

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The present study is in reference to precast concrete (panels) walls as the main structural system. The diversification of the structural systems is a reality due to specific characteristics', as a result there is a lack of study and analysis. Some systems are already established in their applications, for instance: conventional reinforced concrete, structural masonry, metal structures, and wood structure. Apart from this precast concrete elements has had a growth in building sites in Brazil, therefore professionals should be more aware. Affordable house funding initiatives to address the housing shortage has been recurrent throughout the country, additionally precast concrete walls has been an alternative that meets the three basic concepts of engineering, which are: the technique, economy, and security. The objective of this study is to gather concepts from the literature and TOMO (2012) about precast concrete walls and make a didactic synthesis of how they are viewed. The modeling structure method of the system was performed following the concept of assigning bars, using the computer program of calculations SAP2000. Initially will be presented a theoretical part, furthermore a case study to illustrate the sizing of the walls using EXCEL tables programmed with calculation routine. The results will be presented in calculated efforts by the program for further analysis. Finally, will be highlighted important items of modeling and interpretation of the results

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As an alternative to improve the adaptation of prefabricated posts in flared canals and weakened roots, the option is for relining prefabricated pin, known as a technique of anatomical post. This technique, which can be made with composite resin increases the adjustment post to the walls of the canal and reduces the cementing line, causing the retaining post is less dependent on the mechanical properties of the cementing agent. This article aims to provide an overview of anatomical posts, specifically in the last two decades, based on studies extracted from Scielo, Scopus and Pubmed, referring to the following terms of MeSH Data Base: custom made fiber post, indirect fiber glass posts, root canal therapy and post and core tecnique. According to the literature review in this article, it can be concluded that this technique has been used by several authors and has been shown effective and promising, it creates an individualized retainer with better adaptation and decreased mechanical imbrication cementing line .

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The aim of this research consisted in the use of wastes from tropical wood (Cordia goeldiana) with low density and the polyurethane resin (mono and bicomponent) castor oil based in the manufacture of particleboards, generating subsidies as application in rural and civil construction, as well in the furniture industry. The particleboards were manufactured with 15% of polyurethane resin content (one part of pre-polymer and one part of polyol), compaction pressure of 4MPa, pressing temperature of 90 degrees C and press time of 7 minutes. The physical and mechanical properties investigated were density, moisture content, strength modulus in bending and internal bond, both obtained according to the recommendations of the Brazilian standard ABNT NBR 14810:2002. The mean values obtained for these properties were systematically superior to the Brazilian standard requirement. This point showed that it is possible the use of Cordia goeldiana wastes in the particleboard production. We confirmed the hypothesis of a significant linear relation between density and the internal bond of the panels, allowing the estimation of the internal bond of particleboards.

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This paper presents a proposal for the automation of the camera calibration process, locating and measuring image points in coded targets with sub-pixel precision. This automatic technique helps minimize localization errors, regardless of camera orientation and image scale. To develop this technique, several types of coded targets were analyzed and the ARUCO type was chosen due to its simplicity, ability to represent up to 1024 different targets and availability of source code implemented with the OpenCV library. ARUCO targets were generated and two calibration sheets were assembled to be used for the acquisition of images for camera calibration. The developed software can locate targets in the acquired images and it automatically extracts the coordinates of the four corners with sub-pixel accuracy. Experiments were conducted with real data showing that the targets are correctly identified unless excessive noise or fragmentation occurs mainly in the outer target square. The results with the calibration of a low cost camera showed that the process works and that the measurement accuracy of the corners achieves sub-pixel precision.

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One of the actual biggest problems in big towns is the visual pollution. The advertising has become a necessity for any type of business, resulting in the use of as urban spaces as possible like fronts structures, lights, with too many colors and details to keep the attention of sight, thus becoming an important problem for the social and cultural coexistence. The work of graphic designer can reduce this problem through the concepts of visual identity applied on the enterprise building front, giving harmony in the colors and spaces where they can apply the advertising without to attack the urban beauty and esthetics.

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Modernism was a movement that began in the 1920s through the critical activities of Oswald de Andrade, Menotti del Picchia, Mário de Andrade and others who warned of the valuation of national roots. Thus exposed their ideas renewing groups of artists who begin to unite around a new aesthetic proposal. Modern architecture in Brazil had its origins in European avant-garde in the early twentieth century as well, represented by architect Antonio Moya. In 1923 arrives in São Paulo Warchavchik the architect, who always insisted on the same character "modern" time and "Brazil" in its architecture. Years following: architects claim in full, influencing young architects. This research aims to analyze the projects executed by some architects that have reshaped or rewrote the architecture in Brazil with modernism and artistic / visual interference with paneled walls and details entered in these buildings.

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Pós-graduação em Medicina Veterinária - FCAV

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

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A radiação solar constitui-se numa inesgotável fonte energética, havendo um enorme potencial de utilização por meio de sistemas de captação e conversão em outra forma de energia. Para a conversão direta da energia solar em elétrica, são utilizadas células fotovoltaicas constituídas, que associadas constituem um módulo fotovoltaico, sendo que também quando agrupados, formam painéis fotovoltaicos. Estes painéis associados a outros equipamentos que transformam ou armazenam energia elétrica para que ela possa ser utilizada é chamado de sistema fotovoltaico. Neste trabalho, foram determinadas analiticamente formas de obtenção de curvas de corrente e potência fotovoltaicas, e também o ponto de potência máxima. Tais métodos foram aplicados no sistema fotovoltaico localizado na FCA/UNESP, sendo utilizado um sistema constituído por três módulos fotovoltaicos. Para o desenvolvimento das equações que regem a potência dos sistemas fotovoltaicos, procurou-se estudar o circuito elétrico de células fotovoltaicas, sendo necessária também a aplicação de métodos numéricos iterativos para a determinação de alguns parâmetros elétricos. De acordo com os teoremas apresentados, foi possível determinar as expressões analíticas da resistência série e do ponto de potência máxima de uma célula fotovoltaica, possibilitando a geração dos gráficos de tais funções com os dados obtidos experimentalmente. Comparando-se os valores obtidos pelas funções com os valores padrões do sistema fotovoltaico instalado, o valor calculado apresentou um erro de 1,03% em relação ao dado pelo fabricante, representando uma excelente aproximação. Desta forma, pode-se concluir que os métodos e teoremas dos sistemas fotovoltaicos apresentados podem servir de auxílio a futuros dimensionamentos para aplicações destes sistemas.

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Since ancient times, it has been a huge challenge to all people around the world to manage to get their fresh water, keeping it clean and providing it to every human being, so that it can be used for their daily needs. This is especially true for small properties in the countryside and in isolated areas with low demographic density. Pumping the water in those regions is a solution that rationalizes its use in domestic chores, in animal rearing and in the irrigation systems of cultivated areas. Making feasible local, renewable and non-polluted energetic alternatives is the aim for those areas that are usually far away from the public electric network. Using photovoltaic solar energy is the alternative now proposed. For this objective was built a system with two monocrystalline panels, one pump, two water tanks, two level sensors and a solenoid valve to pump water, using a pump powered an array of monocrystalline solar panels. The main goal was to compare their rate of water flow and their energy consumption. The use of one data acquisition equipment allowed collecting meteorological, electrical and hydraulic values, and also serving for the control and activation of the pumping system. During four months in a row as from April 2009, arrangements with one or two panels were tested. Mathematics correlations and adjustment lines were used to interpret the behavior of obtained dataset. During the analyzed period the system followed the linear equations with great accuracy. The daily average amount of water pumped by the several tested arrays stayed between 1,100 and 2,500 liters, and that is enough to supply a small rural property. The pumping system with two panels effectively showed the major amount of water, but a system with one panel can be an economical solution until 1,500 liters on day. It did not characterize a direct relationship between power or quantity of photovoltaic panels and daily outflow of water pumping.