Os repositórios institucionais são estruturas de apoio à investigação que promovem a integração, a partilha e o acesso aberto à produção científica realizada e produzida pela comunidade académica. São ainda um garante para a preservação da memória intelectual e da investigação aplicada de referência. Os repositórios institucionais revestem-se de uma importância cada vez maior para as instituições enquanto produ...
Clusters that combine heterogeneous compute device architectures, coupled with novel programming models, have created a true alternative to traditional (homogeneous) cluster computing, allowing to leverage the performance of parallel applications. In this paper we introduce clOpenCL, a platform that supports the simple deployment and efficient running of OpenCL-based parallel applications that may span several ...
Em junho de 2006 foi criada a Biblioteca Digital do IPB e em novembro desse mesmo ano foram depositados os primeiros documentos. Foram dados os primeiros passos para a concretização de um objetivo plural - a criação de um repositório. É uma estrutura de apoio à investigação que promove a integração, a partilha e o acesso aberto à produção científica, realizada e produzida pela comunidade académica do Instituto ...
Clusters that combine heterogeneous compute device architectures, coupled with novel programming models, have created a true alternative to traditional (homogeneous) cluster computing, allowing to leverage the performance of parallel applications. In this paper we introduce clOpenCL, a platform that supports the simple deployment and efficient running of OpenCL-based parallel applications that may span several ...
Clusters of heterogeneous computing nodes provide an opportunity to significantly increase the performance of parallel and High-Performance Computing (HPC) applications, by combining traditional multi-core CPUs coupled with accelerator devices, interconnected by high throughput and low latency networking technologies. However, developing efficient applications to run in clusters that integrate GPUs and other a...
The effective exploitation of multi-SAN SMP clusters and the use of generic clusters to support complex information systems require new approaches; multi-SAN SMP clusters introduce new levels of parallelism and traditional environments are mainly used to run scientific computations. In this paper we present a novel approach to the exploitation of clusters that allows integrating in a unique metaphor: the repres...
The optimal schedule of lectures and exams is critical in higher education institutions. But it is a very time consuming task for those who are in charge of planning academic activities. For this reason, a considerable attention has been devoted to automated timetabling. Because timetabling solutions are highly dependent on the way institutions are organized, it is common that each institution develops its own ...
We present and evaluate shortcut routing algorithms for Chord graphs in the hash space, specifically developed to accelerate distributed lookups in the Distributed Hash Tables (DHTs) of the Domus framework. The algorithms explore our findings about the relation of exponential and euclidean distances in Chord graphs, in conjunction with the availability, in each DHT node, of multiple routing tables of the underlyi...
This paper presents a multi-objective approach toWeb space partitioning, aimed to improve distributed crawling efficiency. The in- vestigation is supported by the construction of two different weighted graphs. The first is used to model the topological communication infras- tructure between crawlers and Web servers and the second is used to represent the amount of link connections between servers’ pages. The va...
This paper presents a multi-objective approach to Web space partitioning, aimed to improve distributed crawling efficiency. The in- vestigation is supported by the construction of two different weighted graphs. The first is used to model the topological communication infras- tructure between crawlers and Web servers and the second is used to represent the amount of link connections between servers’ pages. The v...
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