Dam Safety
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. APLICATIONS OF PROBABILITY AND STATISTICS IN GEOTECHNICAL ANALYSES / APLICAÇÕES DE PROBABILIDADE E ESTATÍSTICA EM ANÁLISES GEOTÉCNICAS
In geotechnical analyses, forecasts of safety factors or deformations are developed on the basis of deterministics methods, that admit as fixed and known the parameters of the soil or the rock. However, such forecasts are affected by uncertainties proceeding from the reproduction impossibility of the field conditions in laboratory, of the disturbance of the
Publicado em: 2008
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14. Segurança de barragens: aspectos regulatórios
Neste trabalho são apresentadas considerações sócioambientais acerca da segurança de barragens promovendo a interligação da trilogia água, seres vivos e ações antrópicas, bem como a evolução dos aspectos legais. Faz-se um estudo, todavia, sobre os recursos para se estabelecer uma política de ação eficaz que garanta menor risco de acidentes en
Publicado em: 2008
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15. Methodological Proposed of Risk Analysis to Brazilian Northeast Dams - Case Study: Ceara State Dams. / Proposta MetodolÃgica de AvaliaÃÃo de Riscos em Barragens do Nordeste Brasileiro - Estudo de Caso: Barragens do Estado do CearÃ.
A proposta metodolÃgica de avaliaÃÃo de riscos em barragens do nordeste brasileiro, com estudo de caso em 77 barragens do Estado do Ceara, sendo 62 barragens estaduais e 15 federais, visa hierarquizar um conjunto de barragens a partir das inspeÃÃes, incorporando: o nÃvel de perigo; probabilidades; custos; severidade (prejuÃzo a ser evitado); benefÃci
Publicado em: 2007
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16. Verificação da eficácia dos sistemas de vedação e drenagem em fundações de barragens de concreto / Grouting and drainage curtains efficacy verification in concrete dam foundations
One of the biggest problems for hydraulic works safety is the uplift pressure. The execution of grouting, associated with drainage, is very important to control seepage through concrete dam foundations. Therefore, appropriate means to check the efficiency of those systems are essential for dam safety evaluation. Most of the uplift pressure criteria used nowa
Publicado em: 2006
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17. PROBABILISTIC ANALYSES OF SLOPES AND RETAINMENTS STABILITY / ANÁLISES PROBABILÍSTICAS DA ESTABILIDADE DE TALUDES E CONTENÇÕES
Geotechnical projects are generaly assessed through the calculus of the safety factor obtained by deterministic methodologies. The purpose of the present research work is to compare two probabilistic methods (Estimate Punctual and Second Moment) employed in stability analyses. Probabilistic methods quantify the uncertainties derived from the variability of g
Publicado em: 2006
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18. Metodologia para avaliação da segurança de barragens / Methodology for evaluation of dam safety
Dams are structures generally associated to high potential risks due to the possibility of their failure, which could bring catastrophic consequences to the structures themselves, to the enrivonment by destructing the flora and fauna and, mainly, because they could cause economical and life losses. The purpose of this work is to propose and validate an alter
Publicado em: 2005
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19. ANÁLISE NUMÉRICA DO ALTEAMENTO DE BARRAGENS DE TERRA / NUMERICAL ANALYSIS OF RAISING EARTH DAMS
One of the activities related to dam constructions involves the raising of the existent structure, normally done with the objective of increasing the water storage capacity of the reservoirs, improving the safety factor of the embankment slopes or to ensure a better protection against possible water flooding. The raising of an earth dam can be predicted in t
Publicado em: 2005
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20. Methodology for evaluation of dam safety / Metodologia para avaliação da segurança de barragens
As barragens são geralmente obras associadas a um elevado potencial de risco devido à possibilidade de ruptura, com conseqüências catastróficas para as próprias estruturas, para o meio ambiente, com destruição de flora e fauna, e principalmente pelas perdas de vidas humanas e econômicas. Este trabalho tem por objetivo propor e validar uma metodologi
Publicado em: 2005
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21. Qualidade como fator de melhoria da performace de auscultação e monitoramento de barragem
The usual models for dam monitoring were developed from informations taken from the observations made on the behaviour of the instruments ínstalled at those structures. The aim of those procedures are to check and confirm some hipothesis on dam safety, made according to the design criteria. The so called deterministic models may be considered as low perform
Publicado em: 1996
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22. Pharmacokinetics and safety of a unilamellar liposomal formulation of amphotericin B (AmBisome) in rabbits.
A unilamellar liposomal formulation of amphotericin B (LAmB) known as AmBisome was safely administered intravenously to 20 rabbits at 0.5, 1.0, 2.5, 5, or 10 mg/kg of body weight, whereas of 12 rabbits given desoxycholate amphotericin B (DAmB) intravenously at 0.5, 1.0, or 1.5 mg/kg, 2 died of acute cardiac toxicity when DAmB was administered at the highest
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23. Dose-dependent antifungal activity and nephrotoxicity of amphotericin B colloidal dispersion in experimental pulmonary aspergillosis.
We investigated the safety and efficacy of amphotericin B colloidal dispersion (ABCD) for the treatment of invasive pulmonary aspergillosis in persistently granulocytopenic rabbits. Treatment groups included ABCD in dosages of 1, 5, and 10 mg/kg/day intravenously or conventional desoxycholate amphotericin B (DAmB) at 1 mg/kg/day intravenously. Antifungal act