3 resultados para Held, David


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One of today's biggest concerns is the increase of energetic needs, especially in the developed countries. Among various clean energies, wind energy is one of the technologies that assume greater importance on the sustainable development of humanity. Despite wind turbines had been developed and studied over the years, there are phenomena that haven't been yet fully understood. This work studies the soil-structure interaction that occurs on a wind turbine's foundation composed by a group of piles that is under dynamic loads caused by wind. This problem assumes special importance when the foundation is implemented on locations where safety criteria are very demanding, like the case of a foundation mounted on a dike. To the phenomenon of interaction between two piles and the soil between them it's given the name of pile-soil-pile interaction. It is known that such behavior is frequency dependent, and therefore, on this work evaluation of relevant frequencies for the intended analysis is held. During the development of this thesis, two methods were selected in order to assess pile-soil-pile interaction, being one of analytical nature and the other of numerical origin. The analytical solution was recently developed and its called Generalized pile-soil-pile theory, while for the numerical method the commercial nite element software PLAXIS 3D was used. A study of applicability of the numerical method is also done comparing the given solution by the nite element methods with a rigorous solution widely accepted by the majority of the authors.

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O objectivo deste trabalho, relaciona-­‐se com o levantamento de informação escrita relativa ao espólio documental deixado por José Francisco David Ferreira (JFDF), Cientista e Professor Catedrático da Faculdade de Medicina de Lisboa (FML) nascido em 1929 e falecido em 2012. Versa a descrição do processo e da metodologia utilizada, para o projecto em curso, de tratamento do espólio do Cientista e Professor José Francisco David Ferreira. Está enquadrado nos Espólios de Personalidades & Arquivos Científicos em História Contemporânea da Faculdade de Ciências Sociais e Humanas da Universidade Nova de Lisboa.

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Recensão de: David Santos, "A Reinvenção do real – Curadoria e Arte contemporânea no Museu do Neo-realismo", Lisboa: Sistema Solar CRL (Documenta), 2014