999 resultados para Planejamento operacional


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Incluye bibliografía.

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Pós-graduação em Agronomia (Proteção de Plantas) - FCA

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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This work presents a study on the production of biodiesel by esterification reaction of oleic acid with methanol using batch reactor and different catalysts based on CeO2 and WO3 and HZSM-5. Acid treatment was performed in order to increase the catalytic activity. Different characterization techniques were performed, among them X-ray diffraction (XRD), Thermogravimetric analysis TGA/DTA, Spectroscopy in the Region in Fourier Transform Infrared (FTIR) and X-ray fluorescence (XRF). The effects of independent variables: temperature, molar ratio of oil: alcohol and the amount of catalyst and their interactions on the dependent variable (conversion of oleic acid to the corresponding ester). Overall, through the results obtained in the characterization was observed that the applied treatments were efficient, however the XRF technique, indicated that tungsten oxide leaching could occur during the preparation of the materials. The treatments performed on HZSM-5 caused no significant changes in the structure indicating that the zeolite was quite resistant to the treatments used. It was evaluated using complete 23 factorial design. For the catalysts investigated, the best reaction conditions were obtained when using higher levels of the independent variables temperature and amount of catalyst. However, for the variable molar ratio the lowest level showed significant yields for most of the synthesized catalyst, obtaining maximum conversion to the OC (67.97%), OW (74.37%), HZSM-5 (61.16%) OC-OW 1 (75.93%), OC-OW 2 (82.57%), OC-OW 3 (79.15%), S/OC-OW 1 (86.90%), S/OC-OW 2 (91.04%), S/OC-OW 3 (88.60%), S/OC-OW/H 1 (92.34%), S/OC-OW/H 2 (100%) and S/OC-OW/H 3 (98.16%). According to the experimental design, the temperature has the biggest influence on the reaction variable for all the synthesized catalysts. Among the catalysts investigated S/OC-OW/H 2 e S/OC-OW/H 3 were more effective. Reuse tests showed that the catalyst activity decreased after each cycle, indicating that the regeneration process was effective. The leaching test indicated that the catalysts are heterogeneous in the evaluated operating range. The catalysts investigated showed themselves promising for the production of biodiesel.

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Landscape is dynamic, having complex nature, with tangible and intangible dimensions, presenting a continuous evolution process. The aim of this research were based on the identification and classification of landscapes in units and subunits, from the ownership by individuals; the development of a methodology to assist in the planning and management, conciliating conservation of natural areas with anthropic activities; and, from the information gathered, evaluate the different social groups aiming to design a landscape from the sustainable development perspective; thus better understanding both cultural and forest fragmentation processes, in the city of Ouro Preto, Minas Gerais. The research analyzed the current landscape and its historical evolution, distinguishing between material and immaterial dimensions. Information was raised from field trips, soil types, relief, slope, drainage, conservation units, administrative zoning, urban areas, natural resources, economy, tax raising, transport and building infrastructure, satellite images, types of management applied to the preservation or conservation of forests and fields, and semi-structured interviews with the various actors that modify and transform the territory, thus making a balance between the built landscape and the demands of the society and ecosystems. Results were composed by a map of land use in 2011; a map of landscape units and their subunits, with their appropriate definitions; a map with five levels of activities intensity, with their respective descriptions; and raising barriers to improving the welfare of the actors and the integrity of ecosystems. The number of generated ecosystem services are difficult to measure, but its benefits are useful for everyone. The physical changes are a reflection of the economy, which caused environmental impacts, mainly related to mining activities, tourism, agriculture and conservation of natural areas, all requiring ideally a shared management. In this sense, the landscape needs a management to create sustainable alternatives to anthropic activities. The dynamics of the landscape has been shaped by a slow evolution, set by mining activities due to the high financial revenues, there were areas of revegetation after clearcuts in the past, and now tourism lacks structure. The city has great potential for development projects with payments for environmental services, however, gaps for shared management exists.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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As condições políticas, sociais e econômicas deste início de século trouxeram à tona o desafio de enfrentar, simultaneamente, a necessidade de mudanças profundas nas condições econômico-sociais, na distribuição da riqueza socialmente gerada e na construção de condições de desenvolvimento capazes de otimizar os resultados da utilização de recursos naturais e tecnológicos. Depois de décadas de crença nas qualidades mágicas do mercado como promotor do desenvolvimento e da distribuição da riqueza, as atenções começam a se voltar para a necessidade de estabelecer direção aos esforços de desenvolvimento, para o enfrentamento dos enormes desafios sociais, ambientais e econômicos em um ambiente que transcende os limites nacionais. As políticas públicas ganharam, nesse contexto, nova dimensão. O planejamento voltou a ser tema da agenda estatal e dos movimentos sociais. Em artigo recente, Sachs (2011) afirma que “para ganhar a guerra contra a pobreza e o atraso, devemos voltar ao planejamento” esforço que, para ser “digno deste nome, deve enfrentar simultaneamente os desafios ambientais e sociais”.

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Presentación .-- I. Antecedentes generales .-- II. Marcos para la implementación de la agenda regional en población y desarrollo .-- III. Operacionalización de las medidas prioritarias del Consenso de Montevideo sobre Población y Desarrollo: A. Integración plena de la población y su dinámica en el desarrollo sostenible con igualdad de género y respeto de los derechos humanos. B. Derechos, necesidades, responsabilidades y demandas de niños, niñas, adolescentes y jóvenes. C. Envejecimiento, protección social y desafíos socioeconómicos. D. Acceso universal a los servicios de salud sexual y salud reproductiva. E. Igualdad de género. F. La migración internacional y la protección de los derechos humanos de todas las personas migrantes. G. Desigualdad territorial, movilidad espacial y vulnerabilidad. H. Pueblos indígenas: interculturalidad y derechos. I. Afrodescendientes: derechos y combate al racismo y la discriminación racial.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Este documento constituye la contribución de la Mesa Directiva de la Conferencia Regional sobre Población y Desarrollo de América Latina y el Caribe a la Segunda Reunión de la Conferencia Regional, que se realizará en la Ciudad de México, del 6 al 9 de octubre de 2015. Es un instrumento técnico, en que se proporcionan a los países de la región orientaciones específicas para la implementación de las medidas prioritarias del Consenso de Montevideo sobre Población y Desarrollo y se ofrecen insumos relevantes para el monitoreo de dicha implementación, tanto a escala nacional como regional.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)