970 resultados para Peñas


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Medicina Veterinária - FCAV

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The developed research aims to analyze clippings of Petrobras' commemorative 60th anniversary campaign, entitled Gente, é o que inspira a gente., launched in 2013, using concepts of institutional advertising from the perspective of semiotics. The company was chose due to its traditionalism and strength within and outside the country, being one of the 20 largest in the world. During the study, it will be covered topics such as organizational communication and institutional advertising. From analyzing three parts of the Campaign, which aims to influence public opinion about the organization, associating her concepts or images that benefit the way Petrobras is seen. To analyze the effectiveness and efficiency of the campaign, it was chosen as methodological method, the semiotic studies of Charles Peirce, with his concepts of firstness, secondness and thirdness. This approaching intention of its audience is clear in this campaign not only with the participation of employees and signs that compose it, but also with the dissemination of information about the company, such as history, data, policies, methods and services provided, transmitting effectively its essence as a company, through its mission, vision and explicit and implicit values in messages

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In experimental conditions, cutting forces were studied during turning of green alumina billets, including their correlation with surface aspects of the workpiece. The correlation between cutting power and the removal rate are important parameters for defining the design of ceramic products, since inadequate parameters can produce excessive surface damage to the workpiece. This study examined the forces obtained during turning of alumina workpieces with 99.8% purity in their green state, by means of a three-point dynamometer, evaluating the cutting, feed and depth forces, using a cermet tool under constant machining conditions. Variables were compared with the forces, including surface finish, tool wear and temperature during machining. In the study, it was found that the depth of cut had no significant effect on the surface quality, and the cutting speed and feed influencing the finish. However, preliminary tests for selecting the cutting conditions showed that unsuitables cutting speeds and feeds generate severe damage to the workpiece surface. The best condition was 1.00 mm depth of cut, and the forces increasedfor with each pass performed, with the feed force the variable with greatest increases in relation to the cutting and depth forces, and wear of the cutting tool directly influenced the surface finish, generated by the highly abrasive nature of the alumina particles of the green compact. It is emphasized that the alumina in its green state showed high abrasive effect on the cutting tool during the turning process and the surface finishing of the green workpiece had a direct influence on the sintered workpiece.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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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 Design - FAAC

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Pós-graduação em Engenharia Mecânica - FEG