997 resultados para stars: cataclysmic variables


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Consideraciones sobre el estudio de los efectos demográficos de los proyectos de desarrollo y examen de ejemplos concretos en el caso de México.

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Documento Docente - Programa Global de Formación en Población y Desarrollo

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The growing demand for steels with tighter compositional specifications led the Companhia Siderúrgica Nacional (CSN) to develop more efficient processes. To solve this problem this paper aims to identify the operational variables more impacting in the desulfurization process, specifically in torpedo car, as well as its causes and solutions. Then select and test, with laboratorial and industrial tests, desulfurizing agents based of CaC 2, CaO, CaCO3, and Mg to assess the cost per quantity of product desulfurized. The mixture with best results was not that one with highest content of CaC2. It is believed that this mixture showed better efficiency because of the increased agitation of the bath, produced by the releasing of gas from compound CaCO3 present in this mixture. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)