866 resultados para isolamento sismico, instabilità, ponte, arco
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Pós-graduação em Microbiologia - IBILCE
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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This research project focused primarily on assessing the impact toughness of the weld and the base material of a steel pipe API 5L X70 submerged arc welded, used to conduct remote oil and gas (linepipes). The analysis followed strictly the Specification for Line Pipe - API 5L Standard, regarding the removal of the specimens of regions-of-proof-long section of the pipe, at 90o and 180o from the welded joint, and mechanical properties of toughness and Charpy-V, both the joint welded as the base material. Specimens of steel tube supplied by Tenaris Confab-SA were sized for tensile and Charpy-V, according to ASTM E 8M and ASTM E23, respectively. The result obtained showed that the API X70 steel tube has high Charpy-V toughness, near to each other at both 90o and 180o from the welded joint of the tube, and both higher than the weld metal. Microstructural and microhardness analysis complemented the present study
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This work intends to perform the dimensioning of the Guaratinguetá’s Engineering College Baja SAE vehicle suspension system. To do so, concepts of suspension systems, human comfort limits to vibrations and automotive models for suspension vibration analyses are reviewed. On the development of this work descriptions of considerations specific for the vehicle object of this work are made as well as descriptions of the experiment made to determine the stiffness of the tire used. These concepts are applied through a computational routine that allows the dimensioning of springs and shock absorbers of both front and rear axles of a vehicle in a way to respect all the criteria showed during this work and visualize the system’s behavior when excited on different frequencies
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Literature has a role to contribute in the affective, cultural and cognitive development os chindren and it also accumulates the function to form readers among others. Among several genres, there are the fairy tales that are eternal in the western culture and they are the first genres to be read spontaneously at home or to be taught at school. As all the symbolic language, the fairy tales are steeped in ideologies. Thus, the aim of this research is to investigate if the existing ideologies in two fairy tales – Cinderella and The Sleeping Beauty, both from Perrault, influence children between 9 and 10 years old as subjects. An empiric research of quantitative and qualitative approach was done and its data analysis followed the method of Content Analysis, and it has as register analysis unit the word, and of context the sentence (children’s answer). The choice os the classify the categories it was used the syntactic criteria because it’s the most appropriate to refer to register units from ideologies identified by scholars in the area. The results show that children with 9 and 10 years old are influenced by implied ideologies existing in the two fairy tales used in the process of data collection
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Desde 1997, todos os anos muitas pessoas se reúnem na famosa Avenida Paulista, cartão postal da grande cidade de São Paulo, para uma manifestação contra o preconceito e pelo direito civil dos homossexuais. Em todo o mundo essas manifestações se tornaram figura importante do movimento ativista homossexual na luta pelo respeito à diversidade, para abertura de discussões sobre os direitos políticos dos gays, tendo em vista que elas dão maior visibilidade às suas atuações na sociedade. Com o passar dos anos a Parada do Orgulho dos Gays, Lésbicas, Bissexuais e Transgêneros - GLBT de São Paulo tornou-se um fenômeno de público, que desde 2004 ostenta o título de maior parada gay do mundo. Este estudo se utilizará de levantamento de pesquisas e documentos teóricos que tratam da questão, dentro de uma perspectiva qualitativa a respeito da parada, elencando sua importância, seu objetivo, seu interesse e sua militância, na construção de uma educação voltada ao entendimento da diversidade sexual.
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A interação social é um importante fator ambiental que pode influenciar funções fisiológicas. Estudos em humanos e animais têm demonstrado que períodos de isolamento social, principalmente em fases iniciais da vida, estão associados com alterações na função cardiovascular. Entretanto, os mecanismos relacionados com estas alterações ainda são pouco compreendidos. Estudos têm sugerido que alterações na atividade do barorreflexo pode ser um mecanismo importante relacionado com a hipertensão, além de ser um fator de risco para o desenvolvimento de arritmias e morte súbita em diversas patologias cardiovasculares. Diante disso, o objetivo do presente estudo foi investigar os efeitos imediatos e a longo prazo do isolamento social de ratos adolescentes sobre parâmetros cardiovasculares basais e a atividade do barorreflexo. O isolamento social consistiu na manutenção dos animais em caixas individuais por três semanas, do dia pós-natal 27 ao 42. Em um conjunto de animais os experimentos foram realizados imediatamente após o término do isolamento. Outro grupo de animais foi reagrupado em caixas coletivas, em grupos de quatro animais, após o término do isolamento e mantidos nesta condição por outras três semanas. Os grupos controle foram mantidos em caixas coletivas, em grupos de 4 animais, no mesmo biotério e pelo mesmo período que os animais isolados. Os animais apresentaram peso corporal reduzido após o período de isolamento social, e este efeito não foi revertido após ressocialização dos animais. O isolamento social também elevou os parâmetros basais de pressão arterial, mas este efeito foi revertido após o reagrupamento dos animais. O isolamento aumentou a resposta bradicárdica do barorreflexo desencadeada por aumento da pressão arterial... (Resumo completo, clicar acesso eletrônico abaixo)
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This work aims to determine the stresses acting on the main beam of a crane to transport steel coils of up to twelve tons. To determine the stress it was made a revision of the knowledge of the mechanics of materials to apply the analytical method. Following a review of the finite element method is made to understand the same. To complete the study it was used the commercial software ANSYS to determine the stresses by finite element method, the program provides images that help to better understand the results obtained. With the results a comparison of the values of the tensions between the two methods (analytical and finite element) was made. To assist in the calculations it was used the NBR 8400, 1984 (Calculation of Lifting Equipment Load)
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In this work a study of an API 5L X70 steel, which is used in the manufacture of oil and gas pipelines, has been made. This class of steel show high strength and ductility values, and has been increasingly studied due the growing demand of oil and natural gas, which in consequence, increases the needing of new pipelines to transport them. The material studied has been directly taken from a tube provided by TenarisConfab, and a special attention has been given to the fatigue crack growth rate study, which proved that a crack will grow at different rates according to the tube position where it is growing
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Upper canines impaction are considered the second most frequent and are associated to important esthetics and functional limitations. Among the treatment strategies described in the literature the most commonly used are the extraction of the primary canines and the surgical exposure followed by orthodontic traction, that requires an adequate interdisciplinary approach. The aim of this case report is to draw the attention of the clinician to the possibility of adapting the segmented arch technique to manage a canine impaction clinical case.
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This study evaluated in vitro the shear bond strength of brackets bonded with xenon plasma arc light, light-emitting diode (LED) and conventional halogen light using different curing times. Brackets were bonded to the buccal surface of 60 human maxillary premolars allocated to five groups. In groups 1 and 2, the resin was cured with the plasma arc for three and six seconds (s), respectively; in groups 3 and 4, the LED was used for five and ten s, respectively; and in group 5, the halogen light was used for 40 s. The specimens were stored in water for 24 hours and subjected to a shear force until bracket failure. The debonding pattern was classified according to the adhesive remnant index (ARI). The results were assessed by Anova and the SNK post-hoc test. No differences were detected among groups 2, 4 and 5, which showed higher averages than groups 1 and 3, which were not different between themselves. The ARI scores showed no differences among the three types of light sources in all times tested. Plasma arc and LED lights can be used with shorter curing times, within certain limits, than conventional halogen light for bonding orthodontic brackets, without decreasing bond strength.
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Pós-graduação em Ciências Biológicas (Microbiologia Aplicada) - IBRC
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Pós-graduação em Ciência Animal - FMVA