Encontrados 17 documentos, a visualizar página 1 de 2
Produção de biodiesel pelas microalgas Scenedesmus Obliquus e Nannochloropsis s...
Marques, Ricardo Jorge FalcãoTese de mestrado integrado em Engenharia da Energia e do Ambiente, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013 ; In the present study the suitability of microalgae Scenedesmus obliquus and Nannochloropsis sp . feedstock for biodiesel production was evaluated. Some pre-treatments for cell rupture of microalgal dry biomass were studied, in particular mechanical (coffee grinder an...
A spherical gaussian framework for bayesian Monte Carlo rendering of glossy sur...
Marques, Ricardo; Bouville, Christian; Ribardiére, Michael; Bouatouch, KadiThe Monte Carlo method has proved to be very powerful to cope with global illumination problems but it remains costly in terms of sampling operations. In various applications, previous work has shown that Bayesian Monte Carlo can significantly outperform importance sampling Monte Carlo thanks to a more effective use of the prior knowledge and of the information brought by the samples set. These good results hav...
Spherical Fibonacci point sets for illumination integrals
Marques, Ricardo; Bouville, Christian; Ribardiére, Michael; Santos, Luís Paulo; Bouatouch, KadiArticle first published online: 24 JUL 2013 ; Quasi-Monte Carlo (QMC) methods exhibit a faster convergence rate than that of classic Monte Carlo methods. This feature has made QMC prevalent in image synthesis, where it is frequently used for approximating the value of spherical integrals (e.g. illumination integral). The common approach for generating QMC sampling patterns for spherical integration is to resor...
Algorithmic skeleton framework for the orchestration of GPU computations
Marques, Ricardo Jorge dos SantosDissertação para obtenção do Grau de Mestre em Engenharia Informática ; The Graphics Processing Unit (GPU) is gaining popularity as a co-processor to the Central Processing Unit (CPU), due to its ability to surpass the latter’s performance in certain application fields. Nonetheless, harnessing the GPU’s capabilities is a non-trivial exercise that requires good knowledge of parallel programming. Thus, providing...
Avaliação da viabilidade de colectores híbridos fotovoltaicos e térmicos para a...
Marques, Ricardo Licínio Moreira da Rocha PereiraTese de mestrado integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2008
Estudo do posicionamento dos dentes anteriores maxilares - contributo para a mo...
Marques, Ricardo Manuel da Silva GonçalvesMestrado Integrado em Medicina Dentária ; Master Degree in Dental Medicine
Empenhamento organizacional e percepção de apoio organizacional : estudo explor...
Marques, Ricardo Jorge Rosado AnicaTese de mestrado, Psicologia (Secção de Psicologia dos Recursos Humanos, do Trabalho e das Organizações), Universidade de Lisboa, Faculdade de Psicologia, 2010 ; No mundo actual, em que a mudança e necessidade de produtividade se destacam, a relação organização-trabalhador deve ser cada vez mais tida em conta no desenvolvimento dos recursos humanos. A presente investigação tem como objectivo contribuir, precis...
Instant global illumination on the GPU using OptiX
Marques, Ricardo; Santos, Luís PauloOptiX, a programmable ray tracing engine, has been recently made available by NVidia, relieving rendering researchers from the idiosyncrasies of efficient ray tracing programming and allowing them to concentrate on higher level algorithms, such as interactive global illumination. This paper evaluates the performance of the Instant Global Illumination algorithm on OptiX as well as the impact of three di fferent ...
A construção da imagem de Coimbra no contexto das hierarquias urbanas das cidad...
Marques, Ricardo André Mendonça da Silva de MartinsDissertação de mestrado em Cidades e Culturas Urbanas pela Faculdade de Economia da Universidade de Coimbra, 2009
GPU ray casting
Marques, Ricardo; Santos, Luís Paulo; Leskovsky, Peter; Paloc, CélineFor many applications, such as walk-throughs or terrain visualization, drawing geometric primitives is the most efficient and effective way to represent the data. In contrast, other applications require the visualization of data that is inherently volumetric. For example, in biomedical imaging, it might be necessary to visualize 3D datasets obtained from CT or MRI scanners as a meaningful 2D image, in a process...
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