228 resultados para AK43-4880


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We introduce a novel transmission technique of periodic in-line all-optical format conversion between return-to-zero and non-return-to-zero-like aimed at delaying the accumulation of format-specific impairments. A particular realization of this approach using in-line normal dispersion fibre-enhanced nonlinear optical loop mirrors at 40Gbit/s data rate is presented. © 2004 Optical Society of America.

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We introduce a novel transmission technique of periodic in-line all-optical format conversion between return-to-zero and non-return-to-zero-like aimed at delaying the accumulation of format-specific impairments. A particular realization of this approach using in-line normal dispersion fibre-enhanced nonlinear optical loop mirrors at 40Gbit/s data rate is presented.

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On the basis of a long term research of the authors a database model of grain size composition of unlithified marine and ocean bottom sediments has been created. An improved method of water-mechanical analysis has been offered. Grain size parameters of main types of bottom sediments have been measured and calculated. The genetic interpretation of results and regularities of sandy, aleuritic and pelitic material in basins of sedimentation are under discussion.

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A compilation of 1118 surface sediment samples from the South Atlantic was used to map modern seafloor distribution of organic carbon content in this ocean basin. Using new data on Holocene sedimentation rates, we estimated the annual organic carbon accumulation in the pelagic realm (>3000 m water depth) to be approximately 1.8*10**12 g C/year. In the sediments underlying the divergence zone in the Eastern Equatorial Atlantic (EEA), only small amounts of organic carbon accumulate in spite of the high surface water productivity observed in that area. This implies that in the Eastern Equatorial Atlantic, organic carbon accumulation is strongly reduced by efficient degradation of organic matter prior to its burial. During the Last Glacial Maximum (LGM), accumulation of organic carbon was higher than during the mid-Holocene along the continental margins of Africa and South America (Brazil) as well as in the equatorial region. In the Eastern Equatorial Atlantic in particular, large relative differences between LGM and mid-Holocene accumulation rates are found. This is probably to a great extent due to better preservation of organic matter related to changes in bottom water circulation and not just a result of strongly enhanced export productivity during the glacial period. On average, a two- to three-fold increase in organic carbon accumulation during the LGM compared to mid-Holocene conditions can be deduced from our cores. However, for the deep-sea sediments this cannot be solely attributed to a glacial productivity increase, as changes in South Atlantic deep-water circulation seem to result in better organic carbon preservation during the LGM.

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[EN]This paper describes a real-time approach for face detection and selection of frontal views, for further processing. Typically, face detection papers provide results for a set of single images but the problem of face detection in video streams rarely is tackled. Instead of performing an exhaustive search for every video stream frame a set of opportunistic ideas applied in a cascade fashion and based on temporal and spatial coherence provide promising results in real-time.

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O trabalho apresenta o tema “ Qualidade do Atendimento Publico, tendo como ponto de partida a qualidade do serviço prestado no Instituto Nacional de Previdência Social, ilha de São Vicente. Tem como objetivo principal dar resposta à questão de partida que é, simultaneamente, o tema a desenvolver e o título do mesmo, ou seja avaliar o grau de satisfação dos utentes em relação a qualidade do atendimento prestado pelo Instituto Nacional de Previdência Social (INPS) em São Vicente, com a finalidade de conhecer melhor a qualidade do serviço prestado por essa Instituição Pública e contribuir com informações que possam ser efetivamente úteis e capazes de desencadear ações de melhoria ao nível do atendimento publico na referida instituição. Face à responsabilidade assumida, tentou-se proceder a investigação e análise dos aspetos considerados mais relevantes, de forma a encontrar soluções para a melhoraria da qualidade no atendimento aos utentes do INPS na ilha de São Vicente. Para o efeito, a metodologia do estudo foi orientada pela pesquisa bibliográfica e exploratória centrada nas contribuições teóricas de vários autores, a respeito da qualidade de atendimento nas organizações e os fatores que o influencia, em livros, artigos publicados e sites da internet. Recorreu-se ao Modelo SERVQUAL para a avaliação da perceção e expetativa dos utentes do INPS sobre a qualidade de serviço prestado.

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Los usuarios de implante coclear (IC) pasan por procesos de rehabilitación, que incluyen el desarrollo de detección, discriminación, identificación y comprensión sonora. Sin embargo existen pocos programas de tratamiento, en esta área, creados por musicoterapeutas. El objetivo de este artículo es describir las características de un programa de tratamiento de musicoterapia, creado para niños entre 8-10 años con IC, para el desarrollo de la detección, discriminación, identificación y comprensión sonora musical.

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It is now generally accepted that cyber crime represents a big threat to organisations, and that they need to take appropriate action to protect their valuable information assets. However, current research shows that, although small businesses understand that they are potentially vulnerable, many are still not taking sufficient action to counteract the threat. Last year, the authors sought, through a more generalised but categorised attitudinal study, to explore the reasons why smaller SMEs in particular were reluctant to engage with accepted principles for protecting their data. The results showed that SMEs understood many of the issues. They were prepared to spend more but were particularly suspicious about spending on information assurance. The authors’ current research again focuses on SME attitudes but this time the survey asks only questions directly relating to information assurance and the standards available, in an attempt to try to understand exactly what is causing them to shy away from getting the badge or certificate that would demonstrate to customers and business partners that they take cyber security seriously. As with last year’s study, the results and analysis provide useful pointers towards the broader business environment changes that might cause SMEs to be more interested in working towards an appropriate cyber security standard.