João Carlos Furtado

Learn More
Genetic algorithms (GAs) have recently been accepted as powerful approaches to solving optimization problems. It is also well-accepted that building block construction (schemata formation and conservation) has a positive influence on GA behavior. Schemata are usually indirectly evaluated through a derived structure. We introduce a new approach called the(More)
5–7. Here we use an ensemble of simulations with a coupled ocean– atmosphere model to show that the sea surface temperature anomalies associated with central Pacific El Niño force changes in the extra-tropical atmospheric circulation. These changes in turn drive the decadal fluctuations of the North Pacific Gyre Oscillation. Given that central Pacific El(More)
1. Introdução Problemas de agrupamento (clustering) ocorrem geralmente na classificação de dados para algum propósito, por exemplo, para a simples recuperação ou para efetuar uma análise nos dados. Qualquer algoritmo de agrupamento procura grupos naturais ou inerentes aos dados, usando medidas de " distancia " ou " similaridades " entre dados individuais(More)
We show that decadal dynamics of the Pacific Decadal Oscillation (PDO) and the North Pacific Gyre Oscillation (NPGO) are linked through their relationships to ENSO. The PDO and NPGO are first order autoregressive responses of the ocean to the two dominant modes of North Pacific atmospheric variability-the Aleutian Low (AL) and the North Pacific Oscillation(More)
The objective of the present study was to test the hypothesis that the age at which a second language is acquired influences the pattern of cerebral lateralization associated with that language. Subjects who differed in terms of the age at which they had acquired their second language (English or French) were tested on a concurrent task paradigm involving(More)
Huntington's disease (HD) in an inherited neurodegenerative disorder in which the striatum undergoes marked atrophic changes. Patients with HD typically have impaired cognitive function, including deficient visuospatial skills, lack of cognitive flexibility and poor recall of memories. The relationship between these cognitive abnormalities and the striatal(More)
The two most important afferent projections to the striatum contain glutamate and dopamine, respectively. Excitotoxic damage resulting from excessive stimulation of the N-methyl-D-aspartate subtype of glutamate receptor has been implicated in pathophysiology of ischaemic stroke, hypoglycaemic brain damage and Huntington's disease. We studied the ability of(More)
A common pattern related to Arctic sea ice melt, snow advance, and extreme winter weather. the negative AO phase, Arctic weather is relatively mild, while severe winter weather increases across the Northern Hemisphere extratropical continents, including more frequent cold-air outbreaks and storminess. In contrast, during the positive AO phase, cold air(More)
The amount of amoxicillin in pharmaceutical formulations was determined using spectra of diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), in association with partial least squares (PLS) regression. The spectra of 24 different samples (17 for the calibration set and 7 for the validation set), which had been registered using a Nicolet(More)