36 documents found, page 1 of 4
Projeto europeu para a educação em alterações climáticas e tecnologias web asso...
Gonçalves, Vitor; Exposto, José; Patrício, Maria Raquel; Silva, Elisabete Mendes; Chumbo, Isabel; Garcia-Tartera, Francisco; Castiñeiras, PedroNesta última década, as alterações climáticas têm vindo a ser colocadas no topo da agenda mundial. Em algumas regiões, os efeitos correspondem a chuvas torrenciais e outros eventos climáticos extremos, noutras a secas e ondas extremas de calor. Espera-se que esses acontecimentos se intensifiquem nas próximas décadas. Uma vez que os países do arco do Mediterrâneo são particularmente vulneráveis às mudanças climá...
Analysis of the ICT use in companies of Castela and Leão and Northern of Portugal
Pereira, João Paulo; Exposto, José; Ostritsova, ValeriiaICT are one of the most important value for the economic growth. Technology, information, and knowledge has an important impact in peripheral regions when they want to participate in the global market. Exists a lot of discussion about the digital divide between countries but little in relation to the regions and especially Less Favoured Regions (LFR). There is a clear evidence that these internal disparities ca...
Red blood cells radial dispersion in blood flowing through microchannels: the r...
Pinho, Diana; Rodrigues, Raquel Oliveira; Faustino, Vera; Yaginuma, Tomoko; Exposto, José; Lima, Rui A.The behavior of suspensions of individual blood cells, such as red blood cells (RBCs), flowing through microvessels and microfluidic systems depend strongly on the hematocrit (Hct), microvessel topology and cell properties. Although it is well known that blood rheological properties are temperature dependent, to the best of our knowledge no work has studied the role of the temperature on the RBCs dispersion. A ...
Red blood cells radial dispersion in blood flowing through microchannels: the r...
Pinho, Diana; Rodrigues, Raquel O.; Faustino, Vera; Yaginuma, T.; Exposto, José; Lima, Rui Alberto Madeira MacedoThe behavior of suspensions of individual blood cells, such as red blood cells (RBCs), flowing through microvessels and microfluidic systems depend strongly on the hematocrit (Hct), microvessel topology and cell properties. Although it is well known that blood rheological properties are temperature dependent, to the best of our knowledge no work has studied the role of the temperature on the RBCs dispersion. A ...
Comparing clustering and partitioning strategies
Afonso, Carlos; Ferreira, Fábio; Exposto, José; Pereira, Ana I.In this work we compare balance and edge-cut evaluation metrics to measure the performance of two well-known graph data-grouping algorithms applied to four web and social network graphs. One of the algorithms employs a partitioning technique using Kmetis tool, and the other employs a clustering technique using Scluster tool. Because clustering algorithms use a similarity measure between each graph node and part...
Deploying applications in multi-SAN SMP Clusters (extended version)
Alves, Albano; Pina, António; Rufino, José; Exposto, JoséThe 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...
Estratégias de participação para a optimização da descarga distribuída da Web
Exposto, JoséFace à imensidão de informação na Web, a descarga de páginas utilizada, por exemplo, em motores de pesquisa, sugere a criação de um sistema de agentes distribuídos (robôs) que descarreguem vários servidores em simultâneo. Porém, quando procuramos optimizar os mecanismos de descargas somos confrontados, pela necessidade de obedecer às actuais políticas de delicadeza que obrigam à existência de um intervalo de te...
Deploying applications in multi-san smp clusters
Alves, Albano Agostinho Gomes; Pina, António Manuel Silva; Rufino, José; Exposto, JoséThe 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...
Estratégias de partição para a optimização da descarga distribuída de Web
Exposto, JoséFace à imensidão de informação na Web, a descarga de páginas utilizada, por exemplo, em motores de pesquisa, sugere a criação de um sistema de agentes distribuídos (robôs) que descarreguem vários servidores em simultâneo. Porém, quando procuramos optimizar os mecanismos de descargas somos confrontados, pela necessidade de obedecer às actuais políticas de delicadeza que obrigam à existência de um intervalo de te...
Shortcut routing for chord graphs in the domus hash space
Rufino, José; Pina, António; Alves, Albano; Exposto, JoséWe 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...