Processamento digital de imagens de radiografias periapicais sub-expostas aos raios X

The aim of this study was to evaluate whether digitized images obtained from periapical radiographs taken with low dose of radiation could be improved with the aid of a computer software (PhotoStyler) for digital treatrnent. Serial and standardized radiographs of molar and premolar areas were studied. A total of 57 images equivalent to the radiographs taken with reduced exposure time ( 60 and 80% of the time considered normal), digitized and treated, were submitted to the evaluation of seven exanúners which compared them with those images without treatment. lt was verified that about 80% of the images equivalem to lhe radiographs taken with 60% reduction of ordinary exposure time were considered to having quality for supporting diagnosis. As for the images taken with 80% reduction of ordinary exposure time, about 50% of them were considered suitable for the sarne purpose

A atualização do PROUCA nas escolas estaduais do Estado de São Paulo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Simulações de onda de cheia na sub-bacia do Ribeirão Claro - SP

Watersheds are considered important study units when it comes to environmental planning, with regard to the optimal use of water resources. Water scarcity is predicted and feared by many societies, and proves to be an increasingly tangible problem nowadays. Still from the perspective of extreme events, this dissertation considers the study of flood waves in the sub-basin of the stream Claro, which belongs to the Corumbataí watershed. - SP, since thay can also have devastating effects for the population, A Decision Support System for Flood Routing Analysis in Complex Basins, ABC 6 software was applied in order to obtain hydrographs and peak flows in the sub-basin of the stream Claro, for return periods of 10 and 100 years, aiming to comprise events of different magnitudes. The model Soil Conservation Service (SCS) and the triangular SCS hydrograph were adopted for the simulations. Simultaneously, the Kokei Uehara method was applied for the obtainment of peak flow values under the same conditions, seeking to compare results. Data collection was performed using geoprocessing tools. For data entry in ABC 6, the fragmentation of sub-basin of the stream Claro was necessary, which generated 7 small watersheds, in order to fulfill a software demand, as the maximum drainage area it accepts is 50km² for each watershed analyzed. For RT = 10 and 100 years, respectively, the results of peak flow with use of ABC 6 were 46.10 and 95.45 m³/s, while for Kokei Uehara method, the results were 47.17 and 65.26 m³/s. The adoption of a single value of discretization time for all watersheds was indicated as limitation of ABC 6, which interfered in the final results. Kokei method Uehara considered the sub-basin of the stream Claro as a whole, which reduced the error accumulation probability

Framework para integração semântica de dados geoespaciais: integração de dados geológicos

Pós-graduação em Ciência da Computação - IBILCE

Desenvolvimento de uma planilha eletrônica em VBA para o dimensionamento didático de instalações de recalque de água

This study aims to develop a computer program based on VBA programming language, using Microsoft Excel, for designing pumping systems of water. The program allows the user to determine the economical diameter, using the equation of Bresse, for a given installation, since the geometric elevation, the material of the tube, the accessories along the line and the volumetric flow are known. In addition, the program estimates the total annual cost of the installation for three different diameters, in order to compare which diameter is more advantageous from an economical perspective. The program interface is designed to be simple and intuitive with the intention of being didactic and offering to engineering students an advantageous tool to analyze this type of project. Microsoft Excel was chosen for this work because is present in virtually all personal computer, and is an indispensable tool for educational purposes

Introdução à identificação de sistemas utilizando o System Identification Toolbox do MATLAB em conjunto com o Arduino para o laboratório de controle linear

The education designed and planned in a clear and objective manner is of paramount importance for universities to prepare competent professionals for the labor market, and above all can serve the population with an efficient work. Specifically, in relation to engineering, conducting classes in the laboratories it is very important for the application of theory and development of the practical part of the student. The planning and preparation of laboratories, as well as laboratory equipment and activities should be developed in a succinct and clear way, showing to students how to apply in practice what has been learned in theory and often shows them why and where it can be used when they become engineers. This work uses the MATLAB together with the System Identification Toolbox and Arduino for the identification of linear systems in Linear Control Lab. MATLAB is a widely used program in the engineering area for numerical computation, signal processing, graphing, system identification, among other functions. Thus the introduction to MATLAB and consequently the identification of systems using the System Identification Toolbox becomes relevant in the formation of students to thereafter when necessary to identify a system the base and the concept has been seen. For this procedure the open source platform Arduino was used as a data acquisition board being the same also introduced to the student, offering them a range of software and hardware for learning, giving you every day more luggage to their training

Análise de variância WAVELET de séries temporais com dados faltantes: avaliação do índice de cintilação ionosférica S4 em sinais de satélite GPS

Pós-graduação em Matematica Aplicada e Computacional - FCT

Desenvolvimento de um aplicativo para processamento de imagens obtidas por fotografias aéreas

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

Desenvolvimento de uma planilha eletrônica em VBA para o dimensionamento didático de instalações de recalque de água

This study aims to develop a computer program based on VBA programming language, using Microsoft Excel, for designing pumping systems of water. The program allows the user to determine the economical diameter, using the equation of Bresse, for a given installation, since the geometric elevation, the material of the tube, the accessories along the line and the volumetric flow are known. In addition, the program estimates the total annual cost of the installation for three different diameters, in order to compare which diameter is more advantageous from an economical perspective. The program interface is designed to be simple and intuitive with the intention of being didactic and offering to engineering students an advantageous tool to analyze this type of project. Microsoft Excel was chosen for this work because is present in virtually all personal computer, and is an indispensable tool for educational purposes

Introdução à identificação de sistemas utilizando o System Identification Toolbox do MATLAB em conjunto com o Arduino para o laboratório de controle linear

The education designed and planned in a clear and objective manner is of paramount importance for universities to prepare competent professionals for the labor market, and above all can serve the population with an efficient work. Specifically, in relation to engineering, conducting classes in the laboratories it is very important for the application of theory and development of the practical part of the student. The planning and preparation of laboratories, as well as laboratory equipment and activities should be developed in a succinct and clear way, showing to students how to apply in practice what has been learned in theory and often shows them why and where it can be used when they become engineers. This work uses the MATLAB together with the System Identification Toolbox and Arduino for the identification of linear systems in Linear Control Lab. MATLAB is a widely used program in the engineering area for numerical computation, signal processing, graphing, system identification, among other functions. Thus the introduction to MATLAB and consequently the identification of systems using the System Identification Toolbox becomes relevant in the formation of students to thereafter when necessary to identify a system the base and the concept has been seen. For this procedure the open source platform Arduino was used as a data acquisition board being the same also introduced to the student, offering them a range of software and hardware for learning, giving you every day more luggage to their training

Análise de variância WAVELET de séries temporais com dados faltantes: avaliação do índice de cintilação ionosférica S4 em sinais de satélite GPS

Pós-graduação em Matematica Aplicada e Computacional - FCT

Desenvolvimento de um aplicativo para processamento de imagens obtidas por fotografias aéreas

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

Identificación de forma de túneles o refuerzos de minas

En esta comunicación presentamos un procedimiento para identificar la forma de la curva elástica de un túnel o refuerzo de mina, cuando se conocen las distancias entre unos puntos determinados. Este procedimiento puede emplearse para identificar esfuerzos y presiones, comparando los resultados obtenidos a partir de deformaciones sucesivas de la estructura. El método ha sido implementado en un programa de computador que puede emplearse en microcomputadores. Como se ha visto, el método propuesto es suficientemente robusto y seguro para ser aplicado en las severas condiciones de muchos trabajos de ingeniería civil y de minas. La técnica de mínimos cuadrados ha demostrado ser particularmente efectiva para la obtención de las coordenadas de los puntos. El conocimiento de las pendientes o las curvaturas en los puntos extremos mejora notablemente los resultados en las proximidades de estos puntos, aunque no mejora apreciablemente los resultados en los puntos más alejados. La extensión clara del procedimiento es hacia el cálculo de esfuerzos y la identificación de presiones. Esto puede realizarse mediante un método paso a paso, que permita la posibilidad de considerar una respuesta elástica lineal. Si las medidas se toman en intervalos suficientemente cortos, resultaría posible localizar articulaciones plásticas y repetir el método, identificando la forma de la estructura por tramos. Obviamente, al mismo resultado se llegaría si estas articulaciones plásticas se detectaran durante la realización de las mediciones.

Evolución de los métodos de cálculo de láminas plegadas. Una aportación al análisis de estructuras no prismáticas

Se describen someramente las más importantes técnicas de cálculo de estructuras láminas plegadas, y se realiza una comparación entre los métodos analíticos, en particular los procedimientos armónicos y los numéricos. Entre estos últimos, que hacen posible el tratamiento de situaciones reales que se encuentran en la práctica profesional, se expone uno original que permite englobar dentro de un mismo análisis matricial y, por tanto, dentro de un mismo programa de computador, estructuras muy diversas: no prismáticas, con sección transversal múltiple, con apoyos intermedios y con diversos tipos de continuidad transversal. En los ejemplos estudiados se comprueba la bondad de los resultados obtenidos y la excelente eficiencia computacional, en comparación con otros métodos numéricos más universales, que se muestran inadecuados para estos tipos particulares de estructuras.

Análisis elasto-plástico de estructuras porticadas con grandes movimientos

La determinación de la carga última o de rotura de una estructura, constituye un problema importante que, en esencia, consiste en conocer su nivel de seguridad respecto al colapso. El objetivo de esta comunicación consiste en presentar un modelo elastoplástico de cálculo de estructuras de entramado plano, las características del programa de computador y una comparación entre los resultados obtenidos con este modelo y los deducidos mediante procedimientos aproximados. La finalidad del estudio realizado reside en la obtención de unos criterios de proyecto que consideren la influencia de los errores de ejecución en la carga última y, de esta forma, estimar de un modo consistente los niveles de tolerancia admisibles en la construcción de una estructura. Si bien la formulación que sigue se dirige, de un modo específico a las estructuras metálicas de edificación, la extensión al hormigón y otros tipos estructurales es directa.