Browsing by Issue Date, starting with "2011-03"
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- Ocular fundus Imaging: from structure to functionPublication . Serranho, Pedro; Maduro, Cristina; Santos, Torcato; Bernardes, Rui; Vaz, José Cunha; Araújo, Adérito; Barbeiro, SílviaImaging the ocular fundus, namely the retina, to detect and/or monitor changes over time from the healthy condition is of fundamental importance to assess onset and disease progression and is a valuable tool to understand the basic mechanisms of ocular diseases. Current trends point to the need for less or non-invasive approaches, to the need for detailed (higher spatial and temporal resolution) imaging systems and to the quantification as opposed to qualitative classification of any findings. In this work we present a snapshot of our research by presenting two examples of technical development aiming to obtain structural and function information from the human retina, in vivo, using non-invasive techniques, namely optical coherence tomography imaging. Based on our experience and developed work, we are now starting to bridge the gap to brain imaging as the eye is only the starting point of vision.
- Multi-mode resource-constrained project scheduling using RCPSP and SAT solversPublication . Coelho, José; Vanhoucke, MarioThis paper reports on a new solution approach for the well-known multi-mode resource-constrained project scheduling problem (MRCPSP). This problem type aims at the selection of a single activity mode from a set of available modes in order to construct a precedence and a (renewable and non-renewable) resource feasible project schedule with a minimal makespan. The problem type is known to be NP-hard and has been solved using various exact as well as (meta-)heuristic procedures. The new algorithm splits the problem type into a mode assignment and a single mode project scheduling step. The mode assignment step is solved by a satisfiability (SAT) problem solver and returns a feasible mode selection to the project scheduling step. The project scheduling step is solved using an efficient meta-heuristic procedure from literature to solve the resource-constrained project scheduling problem (RCPSP). However, unlike many traditional meta-heuristic methods in literature to solve the MRCPSP, the new approach executes these two steps in one run, relying on a single priority list. Straightforward adaptations to the pure SAT solver by using pseudo boolean non-renewable resource constraints has led to a high quality solution approach in a reasonable computational time. Computational results show that the procedure can report similar or sometimes even better solutions than found by other procedures in literature, although it often requires a higher CPU time.
- Anticastelhanismo e construção da identidade de Portugal no século XVI: o contributo da primeira História de Portugal de Fernando OliveiraPublication . Franco, José EduardoA Identidade Portuguesa foi esculpida culturalmente através de processos que passavam pela afirmação de valores próprios e distintivos acompanhados pela negação dos apostos ou tidos como aquilo que se requeria identificação como o outro contrário de nós. A construção de uma cultura negativa do outro ou dos outros, como o castelhano e o mouro, para referir apenas dois “antis” estruturantes, constitui o lado negativo da nossa cultura nacional que não deixou de ser relevante para a consolidação da ideia de povo capaz de gerir os seus destinos. Fernando Oliveira, primeiro gramático e autor da primeira História de Portugal, ilustra um desses processos de elaboração identitária que passou pela figuração negativa do castelhano.