Great Dams
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Development of innovation routes for iron ore using high intensity magnetic separators
Abstract The mineral processing of low-grade iron ores commonly generates large volumes of slime, which are disposed as tailings. Modern mining requires strives to eliminate the use of tailings dams in a maximum effort to increase metallurgical recovery, the security and reduction of the operational cost. This research aims for the recovery of iron contained
REM - International Engineering Journal. Publicado em: 2022
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2. Comparative study of the chemical composition, fatty acid profile, and nutritional quality of Lophiosilurus alexandri (Siluriformes: Pseudopimelodidae), a Brazilian carnivorous freshwater fish, grown in lotic, lentic, and aquaculture environments
RESUMO Lophiosilurus alexandri é um peixe de água doce, carnívoro, endêmico da bacia do rio São Francisco e encontra-se vulnerável a extinção. Neste estudo, analisamos a composição química (umidade, cinzas, lipídeos e proteína), o perfil de ácidos graxos e qualidade nutricional (índices de aterogênicidade e trombogenicidade, razão entre áci
Neotrop. ichthyol.. Publicado em: 02/12/2019
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3. Network modelling of palm biodiesel plants to supply the isolated electric power systems of Pará state
Despite the great advance brought by the National Interconnected System (NIS), which is able to provide clean hydroelectric power to almost all Brazilian customers, there are still cities supplied by power generated from fossil fuel, which are subsidized by taxes, they are called Isolated Electric Power Systems (IEPS). Pará State, that has 34 cities with IE
Prod.. Publicado em: 01/10/2013
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4. Geração distribuída aplicada à edificações : edifícios de energia zero e o caso do laboratório de ensino da FEC-Unicamp / Distributed generation applied to buildings : net zero energy buildings and the case of the laboratory at FEC-Unicamp
Electricity consumption in Brazil increased 47% in the last decade, and it is estimated that it will increase 55.6% until 2020. Most of the electricity generated in the country is based on large hydroelectric dams, located away from the major cities. The planned expansion of the generation park to meet this increase in the demand is also based on this model,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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5. Características biológicas do peixe amazônico Cichla piquiti (Cichlidae:Perciformes) introduzido no reservatório de Cachoeira Dourada no rio Paranaíba, Brasil
The Basin of the river Tocantins-Araguaia is the natural habitat of the Cichla piquiti species, however, currently it meets widely distributed in dams of the river Paraná especially in the Minas Gerais and São Paulo states. In these subject to flooding plain ecosystems, the trophic ecology of the communities of fish is influenced by some factors that can b
Publicado em: 2010
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6. Fossils in quaternary micrites of Bodoquena Range, Bonito-MS and their application in paleoenvironmental studies / Fósseis em micritos quaternários da Serra da Bodoquena, Bonito-MS e sua aplicação em estudos paleoambientais
Bonito town and surrounding areas in Mato Grosso do Sul state are tourist attractions related with many quaternary carbonate deposits which form waterfalls, dams and render almost zero turbidity waters. That area is part of the National Park of Bodoquena Range and Pantanal Biosphere Reserve (UNESCO). Calcareous tufa are porous rocks formed by calcium carbona
Publicado em: 2009
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7. ESTUDO DA LIQUEFAÇÃO ESTÁTICA EM REJEITOS E APLICAÇÃO DE METODOLOGIA DE ANÁLISE DE ESTABILIDADE
Liquefaction is a phenomenon that happens in saturated granular soils when undergoing loadings rapid enough to produce great pore pressure increase with the consequent reduction of the effective stress and the shear strength. In the mining context, the possibility of the liquefaction occurrence in the granular tailings, when saturated, is a relevant concern
Publicado em: 2009
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8. Água sobre terra : lugar e territorialidade na implantação de grandes hidrelétricas
Hidrelétricas são objetos geográficos resultantes da territorialização de políticas setoriais do Estado e de agentes privados nacionais e transnacionais. Compostas por reservatórios hídricos que requerem centenas de km² de área, as grandes hidrelétricas tem sido amplamente criticadas pelos efeitos negativos aos patrimônios sociais, econômicos e
Publicado em: 2008
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9. Uso do DMT na avaliação de maciços compactados
The quality of compacted fill, be they of road works or dams, is essential to the smooth functioning of work as a whole. Currently, the quality control of this is done by testing that determine the diversion of moistures soil newly compacted, in relation to optimum moisture content, and the degree of compaction achieved. Based on these results characteristic
Publicado em: 2008
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10. Dinâmica do uso dos recursos hídricos nas bacias do ribeirão Entre Ribeiros e do rio Preto, afluentes do rio Paracatu / Water resources use dynamics in watersheds of Ribeirão Entre Ribeiros and Rio Preto, tributaries of the Paracatu River
From times past, humanity confronts problems of environmental degradation. The environment, which always performed efficiently its function of filtration, today finds itself excessively overburdened by human activities: it suffers the risk of its resources exhausting, not being able in certain situations to recuperate itself and needing the help of man. Howe
Publicado em: 2008
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11. AvaliaÃÃo dos procedimentos de introduÃÃo do Pirarucu (Arapaima gigas) na regiÃo Nordeste: retrospectiva histÃrica, situaÃÃo atual e perspectivas futuras / Evaluation of procedures for submitting Pirarucu (Arapaima gigas) in the Northeast: historical overview, current status and future prospects
The national fish farming production is vastly increasing, especially in northeastern Brazil. There is currently a demand for new management techniques for native species. This is because most of Brazilian production is based on farming of exotic species. The bonytongue is a native species with great potential for farming. The bonytongue was first introduced
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/08/2007
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12. Políticas públicas e associativismo no RN: experiências populares
Rural Popular experiences, socially organized on the constructions of the dams at Espinharas River, Serra Negra do Norte, which have been investigated, have reached in positive results. Several institutions, such as the City and State Power, multilaterals, governmental and non-governmental financial organizations, commonly refer to the success of such experi
Publicado em: 2007