995 resultados para Competição espacial


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Climate variability and therefore the rainfall is often cited today, in times to speak of "global change", "global warming", "anthropogenic disasters," among other terms related to climate issues, which may cause floods and disasters that affect entire regions. In this sense, the seasonal rainfall and its extremes in the basin of Ivaí river, which has a drainage area of approximately 36 000 km2, covering a length of 680 km, located in the State of Paraná between coordinates 22 º 54'S 25 ° 44'S and 55 44'W to 52 º 42'W, were analyzed. Influence of rainfall for the man occupation is undeniably important, not less important is the role that this issue poses to the climate abiotic and biotic environment, because the dynamic relations between the fauna and flora is directly related to the availability of water in system (in this case, rain). The methodological procedures used during the research focused on statistical analysis of rainfall series daily, monthly and yearly, provided by the Superintendence of Water Resources Development and Environmental Protection Agency - SUDERHSA, an agency linked to the government of Parana. The analysis period chosen was from 1975 to 2005, with 38 stations for data collection, distributed evenly across the search area. The standard rainfall in the basin is explained mainly by convective processes in the summer (wet season) and front system causing more homogeneous rainfall over the basin (dry season). What is well marked is the occurrence of maximum rainfall in the years 1983 and 1997 (El Niño) and minimal in the years 1977, 1985 and 1988 (La Niña). Finally, although the study area have undergone a significant change in your landscape for over thirty years, this study indicates no significant interference in rainfall.

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Apresenta-se neste trabalho experiências obtidas através de 06 (seis) anos consecutivos de trabalho com a disciplina de Geometria Espacial em turmas de formação inicial de professores de matemática. A proposta de trabalho em grupos colaborativos se justifica pela necessidade atual de os professores em atividade utilizarem essa poderosa ferramenta como facilitadora da aprendizagem pessoal e dos estudantes sob sua orientação. Os alunos das várias turmas foram desafiados à tarefa de apresentarem, ao final da disciplina (semestre), um trabalho contendo: material escrito (capa, formatação, desenvolvimento do tema, cálculos, desenhos, resultados e referências), material concreto produzido com canudos e fitilho (sólidos construídos: acabamento, uniformização, montagem e medidas) e apresentação oral do grupo (arquivos de programas de apresentação). A metodologia proposta para a realização dessa tarefa em todas as turmas foi de grupos colaborativos, com em média 05 (cinco) alunos cada. Para a 1ª turma foi proposta a construção de “esqueletos” dos poliedros de Platão, com a maior aresta (canudinho) fixada. Cada grupo deveria observar uma propriedade dentre as seguintes: sólidos com a mesma área total; com o mesmo volume; com uma mesma esfera inscrita e com uma mesma esfera circunscrita. Todo material coletado dos grupos (escrito, construído ou digital/apresentação oral), está sendo devidamente catalogado, para então ser disponibilizado no Laboratório de Ensino de Matemática do referido curso. Os trabalhos propostos posteriormente foram gradativamente sendo mais desafiadores. O último trabalho proposto (2012) teve o seguinte tema: Poliedros Arquimedianos ou semirregulares.

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Greenhouse with natural ventilation is widely used in tropical countries, and little knowledge is available about how this type of structure affects the spatial variability of agroclimatic variables. The aim of this study was to analyse the spatial variability of relative humidity inside a greenhouse with natural ventilation. The measurement of relative humidity was done at 114 points inside the greenhouse at 9, 12 and 16 hours and on heights of 0.3, 1.2 and 2.0 m. The acquired data were processed by the geostatistical software GS+ and maps were generated and displayed for each time and height using the Surfer 10.3.705 software. The results showed that there were variations in the spatial distribution of relative humidity inside the greenhouse.

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Este artigo apresenta uma proposta de extensão do modelo de aprendizado semi-supervisionado conhecido como Competição e Cooperação entre Partículas para a realização de tarefas de segmentação de imagens. Resultados preliminares mostram que esta é uma abordagem promissora.

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This articles aims to approach the possibilities of holograms utilizations on three-dimensional that, while explored, allow the improvement of the spatial visualization ability. A hologram is a three-dimensional image recorded by laser that results in an image of three dimensions from the essential use of light.

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From the concept of Environmental Education proposed by I.U.C.N. in the 1970’s and considering some of the main teaching methodologies adopted in activities regarding Environmental Education, this paper aims to analyze the methodology named Pedagogy of the Project and presenting some alterations of this method, especially in relation to considered study unity: the watershed. Some teaching techniques are also presented, as well as didactic resources and considerations regarding the questions that can be developed for the students within the teaching or evaluation process. This purpose is complementary to others already existents and can be applied in many environmental or socioeconomics situations.

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Pós-graduação em Agronomia (Produção Vegetal) - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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

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This paper has two main objective the study of the productive space circuit of fertilizers in Brazil. For this, we study the company's operations Vale Fertilizers SA More specifically, the production and consumption of fertilizers in Brazil. In the current globalization the Brazilian countryside know new ways of doing (SANTOS, 1994). This, with less roughness, adopts the Green Revolution package, and introduces inputs to the soil, such as seeders, combines, tractors, herbicides, fungicides and fertilizers (Santos & Silveira, 2001). The examination of the Brazilian case as the agricultural modernization reveals the great vulnerability of modern agricultural regions in the face of globalizing modernization (Santos, 2000: 92). The places that receive capital reproduction of imperatives gain a new medium, is the formation of informational scientific technical means, are the bright spots corresponding to other places (Santos, 1994). Thus, the productive circuits are no longer confined to the environment, but establish connections with distant places (Santos, 1986; Frederick & CASTILLO, 2004). What's more, the policy is now made in the market (Santos, 2000, p.67) and the adoption by the Brazilian government's neoliberal policies, the Brazilian state-owned companies related to fertilizer production circuit are privatized, thereby Brazil makes It is further more dependent on inputs used in the field, including fertilizers