Computer Memory System
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Diferenciação automática de matrizes Hessianas / Automatic differentiation of hessian matrices
In the context of nonlinear programming, many algorithms boil down to the application of Newton s method to the system constituted by the first order Lagrangian conditions. The calculation of Hessian matrices is necessary in this class of solvers. Our focus is on the exact calculation, within machine precision, of Hessian matrices through automatic different
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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2. The use of the Cambridge Neuropsychological Test Automated Battery (CANTAB) in neuropsychological assessment: application in Brazilian research with control children and adults with neurological disorders
Computerized neuropsychological tests can be effective and have many benefits. This paper addresses these issues using the computer-based Cambridge Neuropsychological Test Automated Battery (CANTAB) to assess Brazilian children and adults. Preliminary normative data for Brazilian children obtained in a series of CANTAB subtests are presented together with da
Psychology & Neuroscience. Publicado em: 2011
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3. Controle de acesso baseado em biometria facial
Face recognition is one of the most ordinary and natural task carried out by humans. Even though it is a simple task, it has proved to be a major challenge for artificial intelligence and computer vision researchers. Researches on object detection and recognition, and more specifically those related to human face, has greatly increased their demand in recent
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2010
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4. Um modelo de memória transacional para arquiteturas heterogêneas baseado em software Cache / A transactional memory model for heterogeneous architectures based in Software Cache
The adoption of multi-core processors by the industry has pushed towards the development of new techniques to simplify programming parallel software. The technique called transactional memories is one of the most promising. This technique is able to execute multiple tasks concurrently in an optimistic way to achieve a better performance. Another advantage is
Publicado em: 2010
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5. Explorando memoria transacional em software nos contextos de arquiteturas assimetricas, jogos computacionais e consumo de energia / Exploiting software transactional memory in the context of asymmetric architectures
The shift towards multicore processors taken by the semiconductor industry has initiated an era in which new languages, methodologies and tools are of paramount importance to the development of efficient concurrent systems that can be built in a timely way by all kinds of programmers. One of the main obstacles faced by programmers when dealing with shared me
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2009
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6. DevC: uma linguagem de suporte ao desenvolvimento concorrente de device drives e modelos de controladores de entrada e saÃda
Modern electronic products incorporate several features, combining mobility, computational power, a great capacity for communication and facility for interfacing. Nevertheless, integrating such functionalities increases the complexity of the design. The design of such products includes an embedded system that implements their functionalities in a combined so
Publicado em: 2009
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7. Memory-intensive scheduling policies for distributed applications / Políticas de escalonamento memory-intensive para aplicações distribuídas
This dissertation approaches the process scheduling on clusters of computers, on both homogeneous and heterogeneous platforms. The heterogeneities considered include processor computational power, system main memory quantity and the average disk access time. In this work are proposed four novel policies aimed at realizing the work load sharing on these envir
Publicado em: 2008
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8. Transactional memories : prototyping and simulation of hardware implementations and a characterization of the problem of contention management in software / Memorias transacionais : prototipagem e simulação de implementações em hardware e uma caracterização para o problema de gerenciamento de contenção em software
As parallel architectures become prevalent in the computer industry, more and more programmers are required to write parallel programs and are thus being exposed to the problems related to the use of traditional mechanisms for concurrency control. Transactional memory has been devised as a means for easing the burden of writing parallel Programs: the program
Publicado em: 2008
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9. Low cost three-dimensional reconstruction using a stereo image pair. / Reconstrução tridimensional de baixo custo a partir de par de imagens estéreo.
The acquisition and reconstruction of three-dimensional (3D) geometry of objects and environments have their importance growing in areas such as Computer Vision and Computer Graphics. The current methods to acquire and reconstruct three-dimensional data need sophisticated equipments and assemblies, which have expensive costs and limited applications. This wo
Publicado em: 2008
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10. Alocação dinâmica de recursos computacionais para experimentos científicos com replanejamento automatizado a bordo de satélites / Dybanic allocation of computational resources for scientific experiments with autonomous replanning aboards satellites
The experiments aboard the Brazilian scientific satellites are currently thought to execute its tasks in a repetitive way, collecting, storing and sending data in a cycle that does not suffer great alterations. This way of dealing with the experiments operation fits perfectly to long-term scientific observation. There are, however, short-duration scientific
Publicado em: 2007
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11. Characteristics of the professional formation, clinical practice and biopsychosocial profile of dentists and physicians who work in the area of orofacial pain / Caracteristicas da formação profissional, pratica clinica e perfil biopsicossocial de cirurgiões-dentistas e medicos que atuam na area de dor orofacial
This study investigated the characteristics of professional training, clinical practice and the biopsychosocial profile of dentists and physicians who treat orofacial pain. Based on a stratified design, 150 volunteers were selected at random, where 87 were from dentistry and 63 from medicine, coming from various regions of the country. The criteria for inclu
Publicado em: 2007
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12. Evaluation of memory load indices on distributed computing systems / Avaliação de índices de carga de memória em sistemas computacionais distribuídos
This work presents an analysis of the behavior of load indices related to memory usage and activity. It describes 11 indices which reflect memory load, directly or indirectly. These indices may be easily obtained on the GNU/Linux operating system using the /proc filesystem. A monitoring tool has been developed to make the behavior analysis easier, but it can
Publicado em: 2006