André Ribeiro

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In this work a Multi-Objective Evolutionary Algorithm (MOEA) was applied for feature selection in the problem of bankruptcy prediction. This algorithm maximizes the accuracy of the classifier while keeping the number of features low. A two-objective problem, that is minimization of the number of features and accuracy maximization, was fully analyzed using(More)
— Nowadays mobile applications are becoming increasingly more present in our daily life, allowing people to perform several tasks through the use of smartphones, tablets or equivalent devices. Despite the great benefits in terms of innovation and in the variety of available solutions, the rapid and continuous growth of the mobile market has resulted in some(More)
A Multi-Objective Evolutionary Algorithm (MOEA) was adapted in order to deal with problems of feature selection in data-mining. The aim is to maximize the accuracy of the classifier and/or to minimize the errors produced while minimizing the number of features necessary. A Support Vector Machines (SVM) classifier was adopted. Simultaneously, the parameters(More)
AIM  To evaluate the sound pressure level to which preschool students are exposed. METHOD  This was a prospective, quantitative, nonexperimental, and descriptive study. To achieve the aim of the study we used an audio dosimeter. The sound pressure level (SPL) measurements were obtained for 2 age based classrooms. Preschool I and II. The measurements were(More)
INTRODUCTION The combination of Positron Emission Tomography (PET) with magnetic resonance imaging (MRI) in hybrid PET/MRI scanners offers a number of advantages in investigating brain structure and function. A critical step of PET data reconstruction is attenuation correction (AC). Accounting for bone in attenuation maps (μ-map) was shown to be important(More)
Neste artigo serão analisados comparativamente os frameworks, modelos e normas relacionados à Governança de TI (ITIl, CMMI, COBIT, MPS.BR e ISO 27000) visando perceber semelhanças e diferenças sob a o ponto de vista da Gestão do Conhecimento. Simultaneamente será apresentada a conceituação de Governança para GC, sendo analisados alguns estudos de casos e os(More)
A Internet atual é um enorme repositório de imagens. Obter uma imagem desejada diante dessa enorme quantidade de dados espalhados por milhões de sítios Web, pode se tornar uma tarefa cansativa ou até mesmo impraticável se não tivermos uma ferramenta para nos apoiar. Daí a grande importância de se desenvolver técnicas para recuperar essas imagens com(More)
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