Olive trees are usually irrigated in southern Portugal and given the area devoted to this perennial crop it represents a large demand on regional water resources. Several very intensive hedgerow (1700 to 2000 trees per ha) orchards have recently been established in the region to take advantage of the European Commission decision of allowing the expansion of Portuguese olive tree planting quota. With enhanced ol...
The application of alkaline activated fly ash to soil stabilisation has been recently studied, and although the structural behaviour was adequate, some concerns were raised regarding its apparent viscosity, which proved to be an important issue in jet grouting applications. Therefore, this paper deals with the experimental study of rheology of alkaline activated fly ash-based grouts, namely with: setting time o...
Tese de doutoramento. Engenharia Civil. Faculdade de Engenharia. Universidade do Porto. 2012
Tese de mestrado. Faculdade de Engenharia. Universidade do Porto. 1998
Nas sociedades contemporâneas, é reconhecida a importância cultural e económica da conservação do património arquitectónico e urbano, bem como, da reabilitação do parque habitacional. No conjunto dos países europeus, Portugal é um dos que mais sistematicamente deixa degradar o edificado, prevalecendo ainda atitudes de construir de novo ao invés de reconstruir/reabilitar o existente, embora, actualmente, a activ...
The use of dental implants has been increasing even though failures do occur. The presence of wear debris and oral microorganisms can contribute to infections and jeopardize implant integration. The aim of this work was to study the influence of mixed biofilms in the tribological behaviour of commercially pure titanium for dental implants under different concentrations of fluoride. Samples of titanium with two ...
Dissertação de mestrado em Engenharia Civil (área de especialização em Materiais, Reabilitação e Sustentabilidade da Construção) ; O presente trabalho pretendeu relacionar manifestações de patologia com os diferentes tipos de revestimento exterior de fachada. Nesse sentido, foi efectuado um levantamento de manifestações de patologia, com especial enfoque para os revestimentos de pintura e cerâmicos, tendo-se,...
Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para a obtenção do grau de Mestre em Biotecnologia ; Em Portugal, estudos recentes têm evidenciado um aumento da incidência da Leptospirose, particularmente, no Arquipélago dos Açores (11,1 casos/100.000 habitantes), onde representa um problema emergente de Saúde Pública. O diagnóstico laboratorial baseia-se na detecçã...
The problem addressed in this paper is the integrated vehicle-crew-rostering problem (VCRP) aiming to define the schedules for the buses and the rosters for the drivers of a public transit company. The VCRP is described by a bi-objective mixed binary linear programming model with one objective function aggregating vehicle and crew scheduling costs and the other the rostering features. The VCRP is solved by a he...
This work focus on hospital surgical suite optimization, mainly in the efficient use of the operating rooms when planning elective surgeries. We studied a real case in a hospital in Lisbon. An integer linear programming model was developed to weekly schedule elective surgeries for the hospital surgical suite. The model was tested with real data collected from the hospital records. Non-optimal solutions obtained...
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