Computer Memory System
Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. Modelação temporal de processos de aprendizagem : Implicações praticas e teoricas
Studies that analyze a temporal variation in learning and memory processes are relatively scattered and inconsistent, mainly due to the lack of systematic methods and specifications of the necessary controls that would allow the dissection of a temporal component in the learning process per se. Here we analyze the difficulties of this kind of study and sugge
Publicado em: 1999
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26. Simulação de filas Gi/G/m e verificação de aproximações destas por filas Ph/Ph/m / GI/G/m queueing simulation and GI/G/m queue approximations for Ph/Ph/m queues
The performance evaluation of a GI/G/m queueing system is a classic hard problem. These multi-server queues are notoriously difficult to be evaluated analytically and, a analytic solutions is possible only for special cases, just as the queues M/M/m, M/D/m, M/K2 /m, GI/H2/m, GI/EK/m, GI/Ph/m, Ph/D/m e Ph/Ph/m. The computer simulation models, despite of requi
Publicado em: 1998
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27. Application of a Microcomputer-Based System to Control and Monitor Bacterial Growth
A modular microcomputer-based system was developed to control and monitor various modes of bacterial growth. The control system was composed of an Apple II Plus microcomputer with 64-kilobyte random-access memory; a Cyborg ISAAC model 91A multichannel analog-to-digital and digital-to-analog converter; paired MRR-1 pH, pO2, and foam control units; and in-hous
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28. Utilization of sequence libraries on a 16-bit mini computer with particular reference to high speed searching.
An interactive menu driven system of programmes written in Fortran and designed to utilize the three main nucleotide sequence libraries and one amino acid sequence library was developed to run on a small 16-bit mini computer with limited main memory and mass storage. The software uses a minimum of system function calls and should be transportable with minima
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29. Computer-Assisted Behavioral Assessment of Pavlovian Fear Conditioning in Mice
In Pavlovian fear conditioning, a conditional stimulus (CS, usually a tone) is paired with an aversive unconditional stimulus (US, usually a foot shock) in a novel context. After even a single pairing, the animal comes to exhibit a long-lasting fear to the CS and the conditioning context, which can be measured as freezing, an adaptive defense reaction in mic
Cold Spring Harbor Laboratory Press.
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30. Fast algorithms for large-scale genome alignment and comparison
We describe a suffix-tree algorithm that can align the entire genome sequences of eukaryotic and prokaryotic organisms with minimal use of computer time and memory. The new system, MUMmer 2, runs three times faster while using one-third as much memory as the original MUMmer system. It has been used successfully to align the entire human and mouse genomes to
Oxford University Press.
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31. Signal convergence on protein kinase A as a molecular correlate of learning.
The response of a reaction network composed of protein kinase A, calpain, and protein phosphatase to transient cAMP and Ca2+ signals was studied. An essential feature of signal convergence is that the regulatory subunit of cAMP-dissociated protein kinase A undergoes limited proteolysis by the Ca(2+)-activated proteinase calpain. A dynamic model of this syste
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32. Neuropsychological performance and solvent exposure among car body repair shop workers.
A cross sectional study to evaluate symptom reporting and neuropsychological test performance among a cohort of car body repair workers (n = 124) was performed using a computer-administered test system. Subjects with high and medium current exposures to solvent and paint (n = 39 and 32), and low exposure subjects who formerly painted (n = 29) reported signif
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33. Automated Measurement of Mouse Freezing Behavior and its Use for Quantitative Trait Locus Analysis of Contextual Fear Conditioning in (BALB/cJ × C57BL/6J)F2 Mice
The most commonly measured mouse behavior in fear conditioning tests is freezing. A technical limitation, particularly for genetic studies, is the method of direct observation used for quantifying this response, with the potential for bias or inconsistencies. We report the use of a computerized method based on latency between photobeam interruption measures
Cold Spring Harbor Laboratory Press.
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34. A mechanism for the Hebb and the anti-Hebb processes underlying learning and memory.
In a previous paper, a model was presented showing how the group of Ca2+/calmodulin-dependent protein kinase II molecules contained within a postsynaptic density could stably store a graded synaptic weight. This paper completes the model by showing how bidirectional control of synaptic weight could be achieved. It is proposed that the quantitative level of t
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35. ARACHNE: A Whole-Genome Shotgun Assembler
We describe a new computer system, called ARACHNE, for assembling genome sequence using paired-end whole-genome shotgun reads. ARACHNE has several key features, including an efficient and sensitive procedure for finding read overlaps, a procedure for scoring overlaps that achieves high accuracy by correcting errors before assembly, read merger based on forwa
Cold Spring Harbor Laboratory Press.