191 resultados para Critérios para alocação de riscos


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Pós-graduação em Medicina Veterinária - FMVZ

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Matemática em Rede Nacional - IBILCE

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O geógrafo Lutiane Queiroz de Almeida analisa neste livro os riscos e vulnerabilidades socioambientais para tentar compreender as inter-relações entre vulnerabilidades sociais e exposição aos riscos naturais, como as inundações urbanas. Como estudo de caso, analisa a bacia do rio Maranguapinho, na Região Metropolitana de Fortaleza, que além de ocupar territórios da capital cearense, se estende pelos municípios de Caucaia, Maracanaú e Maranguape. Recorrendo ao cruzamento de uma multiplicidade de dados, parte levantada por ele próprio, referentes a pluviometria, topografia, evolução de ocupação urbana, demografia, renda e educação, entre outros, Almeida criou e aplicou ao espaço analisado um Índice de Vulnerabilidade Socioambiental. Sustentado por inúmeros mapas e tabelas, o trabalho, que serve de modelo para o estudo de outras áreas urbanas do país, demonstra que os espaços com maior exposição aos riscos de inundação são aqueles que detêm os mais altos indicadores de vulnerabilidade social.

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O livro apresenta os resultados mais relevantes das atividades realizadas dentro do Programa de Pesquisa sobre Mudanças Climáticas Globais, patrocinado pela Fapesp e relacionado a estudos de impactos, vulnerabilidades e variabilidades nas mudanças do clima no estado de São Paulo e região sudeste do Brasil. Tais experiências têm sido discutidas e desenvolvidas com grupos de pesquisa de Portugal, que dão ao trabalho um caráter mais abrangente e internacional. O Brasil vem estudando já há algum tempo impactos das mudanças no clima que possam servir como base para estratégias de adaptação e para análises de vulnerabilidade diante das ameaças climáticas. O projeto da Fapesp tem, especificamente, a missão de produzir estudos de detecção e traçar cenários climáticos futuros, com metodologias que possam ser aplicadas em todo o Brasil. Essa metodologia leva em conta uma combinação de dados do clima (observações e projeções derivadas de modelos climáticos) com base em informações ambientais, geográficas, geofísicas e sociais. A ênfase está nos extremos climáticos e nos seus impactos sobre os recursos hídricos, assim como no planejamento com vista a minimizar os desastres naturais de origem meteorológica, que de alguns anos para cá têm se disseminado pelo país

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Pós-graduação em Biometria - IBB

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Pós-graduação em Medicina Veterinária - FCAV

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Pós-graduação em Engenharia Elétrica - FEIS

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In an ever more competitive environment, power distribution companies must satisfy two conflicting objectives: minimizing investment costs and the satisfaction of reliability targets. The network reconfiguration of a distribution system is a technique that well adapts to this new deregulated environment for it allows improvement of reliability indices only opening and closing switches, without the onus involved in acquiring new equipment. Due to combinatorial explosion problem characteristic, in the solution are employed metaheuristics methods, which converge to optimal or quasi-optimal solutions, but with a high computational effort. As the main objective of this work is to find the best configuration(s) of the distribution system with the best levels of reliability, the objective function used in the metaheuristics is to minimize the LOLC - Loss Of Load Cost, which is associated with both, number and duration of electric power interruptions. Several metaheuristics techniques are tested, and the tabu search has proven to be most appropriate to solve the proposed problem. To characterize computationally the problem of the switches reconfiguring was developed a vector model (with integers) of the representation of the switches, where each normally open switch is associated with a group of normally closed switches. In this model simplifications have been introduced to reduce computational time and restrictions were made to exclude solutions that do not supply energy to any load point of the system. To check violation of the voltage and loading criteria a study of power flow for the ten best solutions is performed. Also for the ten best solutions a reliability evaluation using Monte Carlo sequential simulation is performed, where it is possible to obtain the probability distributions of the indices and thus calculate the risk of paying penalty due to not meeting the goals. Finally, the methodology is applied in a real Brazilian distribution network, and the results are discussed.

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Lianas play a key role in many tropical forests ecosystems, contributing to community abundance, diversity and structure. Techniques to census lianas and estimate biomass have been used mainly in tropical forests. The aim of this study was to verify if different measurement location on the stem and inclusion criteria influence the estimations of liana abundance and biomass in Cerrado. The study was carried out at Itirapina fragment (ca 260 ha) located in Sao Paulo, Southeast Brazil. We measured all apparent ramets of rooted lianas by using different inclusion criteria: >= 0.5 cm in diameter at 30 cm basal area (D_30), and at 130 cm diameter breast height (DBH), in 36 transects (10 x 25 m). We compared the biomass using the allometric equation based on data from tropical florest take at 130 cm (DBH) and other The allometric biomass equation development to estimate the aboveground biomass of live lianas in tropical forests (DAP = 130 cm) was used. We tested the liana biomass, based on measurements taken at (D_30) using two different conversion equations. The results did not show significant differences in liana abundance and above ground biomass estimated applying the different criteria of inclusion However the biomass estimated from data collected at D_30 and converted into DAP showed a tendency to increase in biomass. Our findings suggest that the protocol used to the census of liana and the allometric biomass equation proposed to forests can be applied in the Cerrado.

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Knowing the attributes of the most suitable species to overcome the obstacles in different environmental conditions is an important tool for ecological restoration. To evaluate the comparative performance of native Cerrado species being cultivated at an arboretum (Assis State Forest, Assis, SP, Brazil), we categorized 106 species by the following attributes: average annual increment in height and crown diameter, survival rates, frequency of herbivory, frost susceptibility and seed dispersal syndrome. The score of each attribute may vary from 1 to 3, and the value of a species for restoration was generated from the sum of the scores for the different attributes converted to the scale of 0 to 100. Analyzing the species altogether, survival was 70%, the average annual increment was 30 cm in height and 21 cm in crown diameter. Only 8% of the species showed high susceptibility to frost and 17% high frequency of herbivory. Eighteen species had scores above 80, being the first Annona crassiflora, Cecropia pachystachya, Enterolobium gummiferum, Plathymenia reticulata e Protium heptaphyllum. In this group are the species that gather the highest number of favorable attributes for the restoration of Cerrado vegetation. We generated two separate lists of ten species of higher value, one for the cerrado sensu stricto and the other for cerradao the forest type of cerrado vegetation. We believe that using these species accelerates the recovery of vegetation structure and thus provide the restoration of ecological processes of ecosystems undergoing restoration. At the end of the list are species of low scores, which, if used, can lead to higher costs or delay in the recovery of structure and ecological processes of the ecosystem being restored.

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

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Pós-graduação em Ciência e Tecnologia Animal - FEIS