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Users of Scientific Computing Environments (SCE) benefit from faster high-level software development at the cost of larger run time due to the interpreted environment. For time-consuming SCE applications, dividing the workload among several computers can be a cost-effective acceleration technique. Using our PVM and MPI toolboxes, MATLAB and Octave users in(More)
A total of 251 clinical specimens (235 gastric aspirates and 16 bronchoalveolar lavages) from 88 children were prospectively tested in a blinded manner for the presence of Mycobacterium tuberculosis complex, by use of the Amplicor M. tuberculosis test and by means of in-house polymerase chain reaction (PCR). The results were compared with those obtained by(More)
Protein structure prediction (PSP) is an open problem with many useful applications in disciplines such as medicine, biology and biochemistry. As this problem presents a vast search space and the analysis of each protein structure requires a significant amount of computing time, it is necessary to take advantage of high-performance parallel computing(More)
Aggregating the capacity and bandwidth of the commodity disks in the nodes of a cluster provides cost effective and high performance storage systems. Nevertheless, this strategy could be a feasible approach only if the mean time to failure of disks and nodes is faced. The number of failures increases with the nodes and it is especially important in parallel(More)
We investigated the value of the polymerase chain reaction (PCR) in the diagnosis of active tuberculosis in children and evaluated the relationship between PCR results in children with tuberculous infections and mediastinal adenopathies detected by computerized tomography (CT-Scan). This was a controlled, blinded, prospective study comparing nested PCR,(More)
Time-driven simulation methods in traditional CPU architectures perform well and precisely when simulating small-scale spiking neural networks. Nevertheless, they still have drawbacks when simulating large-scale systems. Conversely, event-driven simulation methods in CPUs and time-driven simulation methods in graphic processing units (GPUs) can outperform(More)
This paper analyzes the performance of some fuzzy implications proposed in the bibliography together with the operators needed for their definition and for the fuzzy inference process, Examining the specialized literature, it is clear that the selection of the best fuzzy implication operator has become one of the main question in the design of a fuzzy(More)
Here we describe our LAM/MPI interface for the Octave programming environment, similar to our previous MPITB (MPI toolbox) for MATLAB and based in the experience we gained with that work. Despite the series of attempts by other developers, no complete MPI interface was yet available for Octave, and some of the previous partially successful attempts are no(More)