985 resultados para natural ventilation


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João Franco Barreto, escritor português, nasceu em Lisboa em 1600, ignorando-se a data de sua morte. Em 1624, integrou expedição de libertação da Bahia das mãos dos holandeses. Ao regressar a Portugal dedicou-se às letras: escreveu obras como ‘Cyparisso’, ‘Biblioteca Portuguesa’, ‘Ortografia portuguesa’; traduziu a Eneida, de Virgílio; e dirigiu a edição de um Dicionário dos nomes próprios que se encontram nos Lusíadas de Luis de Camões. Segundo Inocêncio, essa tradução de Barreto, publicada em 1763, corresponde à segunda edição, ainda que esta informação não figure no corpo da obra, e ‘seja em demasia parafrástica, e que muitas vezes não reproduza fielmente o sentido do original, em razão das dificuldades da rima, a que o tradutor quis sujeitar-se, todavia, a pureza e correção de linguagem com que foi escrita juntas à louçania do estilo, e a uma versificação quase sempre fluida e harmoniosa, fazem e farão sempre com que este trabalho não seja de todo esquecido, apesar de terem aparecido depois outras versões sem dúvida mais perfeitas’. A coleção, dividida em dois volumes, traz os livros I a Vl e VII a XII. A primeira parte, que corresponde à ‘Odisséia’, narra as viagens de Enéas até a sua chegada à Itália. A segunda, a exemplo da ‘llíada’, descreve as guerras pela conquista do Lácio até a fundação do reino de Lavinio.

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This paper simulates a one-dimensional physical model of natural gas production from hydrate dissociation in a reservoir by depressurization. According to the principles of solid hydrate decomposition in stratum and flow of natural gas in porous medium, the pressure governing equations for both gas zone and hydrate zone are set up based on the physical production model. Using the approximation reported by N. N. Verigin et al. (1980), the nonlinear governing equations are simplified and the self-similar solutions are obtained. Through calculation, for different reservoir parameters, the distribution characters of pressure are analyzed. The decline trend of natural gas production rate with time is also studied. The simulation results show that production of natural gas from a hydrate reservoir is very sensitive to several reservoir parameters, such as wellbore pressure and stratum porosity and permeability.

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In the present talk, the simulation of vortex dominant and turbulent flows are primarily addressed. To cope with complicated circumstances in environmental flows we illustrate the strategy of combining simplified physical model and suitable algorithm by a few examples.

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Galeria dos brasileiros illustres traz retratos copiados do natural e litografados das principais figuras brasileiras da política, ciências e letras, com biografias redigidas por diversos escritos da época, por alguns dos próprios biografados ou por membros de suas famílias. Considerada a mais importante de Sisson, esta obra teve tiragem reduzida e muitos exemplares foram desmanchados por antiquários que emolduravam os retratos, vendendo-os por alto preço. Segundo Borba de Moraes, "é muito difícil encontrar-se hoje em dia um exemplar perfeito e em boas condições" e que "só muito raramente aparece um exemplar à venda."

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A presente Nota Técnica, que atende à Solicitação de Trabalho nº 941/2013-COFF/CD, de autoria da Liderança do PDT, visa analisar, do ponto de vista das repercussões orçamentárias e financeiras, as proposições que tiveram como finalidade destinar recursos para as áreas de educação e saúde, decorrentes da exploração de petróleo e gás natural. São apresentadas projeções de arrecadação de receitas para os próximos dez anos e o impacto das destinações pretendidas nas áreas de educação e saúde, notadamente em vista de seus pisos constitucionais e do cumprimento das metas definidas no plano nacional de educação.

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Each year, more than 500 motorized vessel groundings cause widespread damage to seagrasses in Florida Keys National Marine Sanctuary (FKNMS). Under Section 312 of the National Marine Sanctuaries Act (NMSA), any party responsible for the loss, injury, or destruction of any Sanctuary resource, including seagrass, is liable to the United States for response costs and resulting damages. As part of the damage assessment process, a cellular automata model is utilized to forecast seagrass recovery rates. Field validation of these forecasts was accomplished by comparing model-predicted percent recovery to that which was observed to be occurring naturally for 30 documented vessel grounding sites. Model recovery forecasts for both Thalassia testudinum and Syringodium filiforme exceeded natural recovery estimates for 93.1% and 89.5% of the sites, respectively. For Halodule wrightii, the number of over- and under-predictions by the model was similar. However, where under-estimation occurred, it was often severe, reflecting the well-known extraordinary growth potential of this opportunistic species. These preliminary findings indicate that the recovery model is consistently generous to Responsible Parties in that the model forecasts a much faster recovery than was observed to occur naturally, particularly for T. testudinum, the dominant seagrass species in the region and the species most often affected. Environmental setting (i.e., location, wave exposure) influences local seagrass landscape pattern and may also play a role in the recovery dynamics for a particular injury site. An examination of the relationship between selected environmental factors and injury recovery dynamics is currently underway. (PDF file contains 20 pages.)

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Describes the routine activities that make up the work day of the University's Natural Resources Institute. Hours at the microscope, data recording, analysis, and publications. Responsible for a broad program of research and conservation education. Its main concern is with fresh and salt water fisheries, seafood processing and marketing, estuarine studies, game animals, forestry, and water pollution problems. (PDF contains 4 pages.)

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The Alliance for Coastal Technology (ACT) convened a workshop on the in situ measurement of dissolved inorganic carbon species in natural waters in Honolulu, Hawaii, on February 16, 17, and 18, 2005. The workshop was designed to summarize existing technologies for measuring the abundance and speciation of dissolved inorganic carbon and to make strategic recommendations for future development and application of these technologies to coastal research and management. The workshop was not focused on any specific technology, however, most of the attention of the workshop was on in situ pC02 sensors given their recent development and use on moorings for the measurement of global carbon fluxes. In addition, the problems and limitations arising from the long-term deployment of systems designed for the measurement of pH, total dissolved inorganic carbon (DIC), and total alkalinity (TA) were discussed. Participants included researchers involved in carbon biogeochemistry, industry representatives, and coastal resource managers. The primary questions asked during the workshop were: I. What are the major impediments to transform presently used shipboard pC02 measurement systems for use on cost-eficient moorings? 2. What are the major technical hurdles for the in situ measurement of TA and DIC? 3. What specific information do we need to coordinate efforts for proof of concept' testing of existing and new technologies, inter-calibration of those technologies, better software development, and more precise knowledge quantzjjing the geochemistry of dissolved inoeanic carbon species in order to develop an observing system for dissolved inorganic carbon? Based on the discussion resulting from these three questions, the following statements were made: Statement No. 1 Cost-effective, self-contained technologies for making long-term, accurate measurements of the partial pressure of C02 gas in water already exist and at present are ready for deployment on moorings in coastal observing systems. Statement No. 2 Cost-effective, self-contained systems for the measurement of pH, TA, and DIC are still needed to both fully define the carbonate chemistry of coastal waters and the fluxes of carbon between major biogeochemical compartments (e.g., air-sea, shelf-slope, water column-sediment, etc.). (pdf contains 23 pages)