Robust and fast vowel recognition using optimum-path forest

The applications of Automatic Vowel Recognition (AVR), which is a sub-part of fundamental importance in most of the speech processing systems, vary from automatic interpretation of spoken language to biometrics. State-of-the-art systems for AVR are based on traditional machine learning models such as Artificial Neural Networks (ANNs) and Support Vector Machines (SVMs), however, such classifiers can not deal with efficiency and effectiveness at the same time, existing a gap to be explored when real-time processing is required. In this work, we present an algorithm for AVR based on the Optimum-Path Forest (OPF), which is an emergent pattern recognition technique recently introduced in literature. Adopting a supervised training procedure and using speech tags from two public datasets, we observed that OPF has outperformed ANNs, SVMs, plus other classifiers, in terms of training time and accuracy. ©2010 IEEE.

Simulation of the flow through automatic valves of hermetic compressors by the immersed boundary method approach

The main goal of the present work is to verify the applicability of the Immersed Boundary Method together with the Virtual Physical Model to solve the flow through automatic valves of hermetic compressors. The valve was simplified to a two-dimensional radial diffuser, with diameter ratio of D/d = 1.5, and simulated for a one cycle of opening and closing process with a imposed velocity of 3.0 cm/s for the reed, dimensionless gap between disks in the range of 0.07 < s/d < 0.10, and inlet Reynolds number equal to 1500. The good results obtained showed that the methodology has great potential as project tool for this type of valve systems. © The Authors, 2011.

Software for calculation of reservoir active capacity with the sequent-peak algorithm

It is presented a software developed with Delphi programming language to compute the reservoir's annual regulated active storage, based on the sequent-peak algorithm. Mathematical models used for that purpose generally require extended hydrological series. Usually, the analysis of those series is performed with spreadsheets or graphical representations. Based on that, it was developed a software for calculation of reservoir active capacity. An example calculation is shown by 30-years (from 1977 to 2009) monthly mean flow historical data, from Corrente River, located at São Francisco River Basin, Brazil. As an additional tool, an interface was developed to manage water resources, helping to manipulate data and to point out information that it would be of interest to the user. Moreover, with that interface irrigation districts where water consumption is higher can be analyzed as a function of specific seasonal water demands situations. From a practical application, it is possible to conclude that the program provides the calculation originally proposed. It was designed to keep information organized and retrievable at any time, and to show simulation on seasonal water demands throughout the year, contributing with the elements of study concerning reservoir projects. This program, with its functionality, is an important tool for decision making in the water resources management.

A utilização de linguagem VRML na educação à distância em arte

Pós-graduação em Artes - IA

Algoritmos de detecção de bordas implementados em FPGA

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Aplicação da transformada integral generalizada no escoamento potencial em contrações

Pós-graduação em Engenharia Mecânica - FEIS

Mídia impressa e leitor: uma leitura crítica e polissêmica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Visibilidade na MPB: isotopias na composição musical de Renato Russo e sua atualização midiática : uma abordagem sincrética

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Demandas profissionais na produção de conteúdo para televisão digital: um estudo do caso da TV Brasil

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

O uso da mídia e a presença dos gêneros textuais no processo ensino-aprendizagem: uma análise do material didático - cadernos do aluno e do professor - de língua portuguesa do estado de São Paulo

Pós-graduação em Educação - IBRC

Notícia virtual: um olhar sobre a linguagem imagética

Pós-graduação em Educação - IBRC

Modelo de software livre para dimensionamento hidráulico de pivô central

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Os sentidos atribuídos à escrita por uma criança pequena com Síndrome de Down: um estudo a partir de atuação pedagógica na educação infantil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A aquisição da linguagem escrita pela criança surda no contexto da educação inclusiva

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A inserção da criança pré-escolar no universo da cultura escrita pela mediação do desenho

Pós-graduação em Educação - FFC