60 resultados para operária


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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

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O texto tem como proposta o questionamento de uma suposta neutralidade atribuída à organização do processo de trabalho capitalista. Com este questionamento busca-se recuperar, como proposta política, a prática de resistência operária que se exerce no âmbito mesmo da fábrica.

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Over the past five decades several different interpretative traditions have taken on the task of trying to explain the origin of industrialists in Brazil and to analyze their behavior pattern from a business perspective, as well as in response to the country's biggest political issues. Although this is a stimulating subject, considering the important role to be played by these social actors in weaving the fabric of capitalist modernization in 20th century Brazil, not much of substance has been written about it, in contrast with, for instance, research about the working class. This paper makes a brief assessment of what we believe to be one of the most significant among the possible variables for interpreting the experience of the industrialist class, which demands the complexity inherent to the topic as a counterpoint to the simplified generalization which is recurrent in most writings about this subject.

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2,25Cr-1Mo alloy steels are widely used in petrochemical plant equipments working in high temperature conditions because of their good mechanical proprieties in these conditions. Although, when exposed for a long time at high temperature, in the rage of 343 °C to 593 °C, may present the temper embrittlement phenomenon. The component named stripper of assembly converter of fluid catalytic cracking unit (UFCC) of studied plant is manufactured using this material, which is subject to temper embrittlement. The phenomenon of temper embrittlement refers to progressive lose of toughness, making the material brittle. With embrittlement, equipaments manufactured with this material are under risks to suffer brittle fracture in the cool down and start-up situations of them, which can cause catastrophic failures. By this reason, this research studies presence of temper ebrittlement phenomenon on this material. To verify the toughness of the material is conventionally used charpy V-notch test. However, this test requires the removing of samples of the material to make specimens. This fact becomes critical when talk about structural components of an equipment. So, this research also studies a non-destructive test that can be executes in-situ, known as instrumented indentation, as an alternative detection of the phenomenon at the component stripper, by comparative of the mechanical proprieties obtained by conventional tests in similar samples

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Studies about structural integrity are very important when it desires to prevent disasters associated with flaws inherent in materials used in structural components. The welded joints in steel pipes used to conduction and distribution of oil and gas correspond to the regions most susceptible to flaw. Aiming to contribute to this research line, the present study was designed to assess experimentally the structural integrity of welded joints in steel pipes API 5L X70 used in pipeline systems. This assessment is given from tests of CTOD, whose aim is simulate in laboratory the real behaviour of crack from of his propagation on the welded joint obtained by high frequency electric resistance welding. In this case, the analyses are performed from specimens SE(B) obtained directly of steel pipe API 5L X70. The proposed methodology involves tests of CTOD at lower temperature, in order to assess the toughness of material in critical operation conditions. From performance of CTOD tests, was possible assess the toughness of welded joints in terms of quantity through CTOD parameter and in terms of quality from behaviour of curve load versus CMOD. In this study, also, sought to compare CTOD’s results obtained through rules ASTM E1820 (2008) and BS 7448 (1991). Although the two standards cited previously have adopted different parameters to calculated the value of CTOD, concluded that the values of CTOD tend to converge for a common value

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The objective of this paper is to discuss the construction of the image of São Paulo state public schools teachers in the public sphere, by the media and the trade union press, and see how that image is formed in both of them, without making any comparisons, from the covering of 2010 strikes by newspapers Folha de S. Paulo and Jornal da Apeoesp. This paper uses as theoretical basis the study of Media Hegemony, the concept of Radical Media and Public Sphere, as well as the relationship between them and social movements. It also considers the observation of the history and characteristics of trade union press and the Standards of Manipulation by the Press, proposed by Perseu Abramo. The chosen method was the identification, selection and organization of stories about education published by Folha de S. Paulo during the period; the application of Abramo’s proposed manipulation standards on the stories about the strike; research, selection and observation of print publications (Jornal da Apeoesp and newsletters Apeoesp Urgente) about the strike, published by Apeoesp during the same period

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Airplane Motor Cradles have a complex geometry, since they require different conbinations between different tubes and TIG welded in several angles. In T-25 aircraft and Universal T-27 Tucano (EMBRAER / FAB), besides having to bear the engine balance, these components maintain fixed the nose landing gear in another extremity. They are considered critical to flight safety, and for this reason, the aviation standards are extremely rigid in their production, imposing a zero index” of defects on the final weld metal quality. These structures may be containing an historical of welding repairs, whose effects on their structural integrity are not computed. In this work we analyzed the standardised AISI 4130 steel and the raw steel of tubes to the Airplane Motor Cradles. First of all, microscopy and microanalysis of the base steel, then we analyzed the effects of the TIG weld. Tensile testing was conducted to measure the difference between the mechanical properties of standardised steel and without this treatment

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The study of mechanical properties of high-alloy special steels is of great interest of the steel industry due to the great demand by companies that manufacture automotive components of high criticality, and also because of its high commercial value. However, the development of this type of alloy metals demand highly technical knowledge. Among these extremely important kinds of steel, the subject which is the interest of this study is the special steel modified by niobium. The manganese and niobium are the main alloying elements in the composition of these steels, both of them increase the stability of the austenite region, however, manganese increases the hardenability and tensile yield strength, and niobium increases the mechanical strength and promotes refining the grain. The mechanical characterization of steel SAE 1312 modified the niobium was made in order to gain a better understanding of the influence on the mechanical properties caused by aging at different temperatures and for different reductions in the drawing of gauge material. This characterization was made by means of tensile test and hardness. This material showed an increase in yield strength and hardness when gauge with large reductions during the wiredrawing, but when subjected to aging temperatures higher than 300 ° C had a slight loss of these properties

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Os artigos apresentados neste volume da coleção “Desafios Contemporâneos” têm como objetivo refletir sobre os problemas atuais que marcam o diálogo com o campo acadêmico e científico da Comunicação. Os 18 artigos reunidos aqui contemplam a área de Comunicação e envolvem diferentes linhas de pesquisa. A iniciativa teve como fim expor não apenas as discussões gerais sobre o campo, mas também a experiência singular e atuante dos pesquisadores da Unesp dedicados ao estudo da Comunicação. Três eixos nortearam a organização dos artigos. O primeiro, “Múltiplas formas de linguagem e produção de sentido”, reúne textos que investigam o campo da produção, da circulação e do funcionamento e das estruturas da linguagem nas diversas mídias e nas suas tipologias textuais. “Políticas e estratégias da Comunicação” trata dos processos e fluxos de comunicação no mundo atual e sua relação com a política na sociedade. Já o terceiro eixo, “Relações socioculturais e suas manifestações na esfera da indústria cultural e das mídias digitais”, analisa as dimensões dos processos, da difusão e da recepção dos produtos midiáticos em sua relação sociocultural. Entre os temas abordados estão a comparação entre as linguagens jornalística e publicitária, a censura judicial à liberdade de imprensa, o desafio teórico-metodológico na aplicação da antropologia interpretativa ao campo da comunicação, conjunturas e desafios da educação superior em comunicação no Brasil, a focalização da vida operária no cinema de Leon Hirszman pelo filme Eles não usam black-tie, entre outros.

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Pós-graduação em História - FCHS

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Pós-graduação em Artes - IA