C programs for solving the time-dependent Gross-Pitaevskii equation in a fully anisotropic trap

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Tool support for generating passive C++ test oracles from object-z specifications

A test oracle provides a means for determining whether an implementation behaves according to its specification. A passive test oracle checks that the correct behaviour has been implemented, but does not implement the behaviour itself. In previous work, we have presented a method that allows us to derive passive C++ test oracles from formal specifications written in Object-Z. We describe the "Warlock" prototype tool that supports the method. Warlock is built on top of an existing Object-Z type checker and generates oracle code for a substantial subset of the Object-Z language. We describe the architecture of Warlock and its application to a number of Object-Z specifications. We also discuss its current limitations.

Teste "W" 20 metros : proposta computadorizada para analise da performance especifica em atletas de voleibol

Universidade Estadual de Campinas . Faculdade de Educa����o F��sica

Type checking cryptography implementations

Cryptographic software development is a challenging eld: high performance must be achieved, while ensuring correctness and com- pliance with low-level security policies. CAO is a domain speci c language designed to assist development of cryptographic software. An important feature of this language is the design of a novel type system introducing native types such as prede ned sized vectors, matrices and bit strings, residue classes modulo an integer, nite elds and nite eld extensions, allowing for extensive static validation of source code. We present the formalisation, validation and implementation of this type system

Algoritmo neurogen��tico com vistas para o planejamento de rotas de rob��s m��veis aut��nomos

P��s-gradua����o em Ci��ncia da Computa����o - IBILCE

Optimiza����o da lista de c��lulas vizinhas em redes LTE

Trabalho Final de Mestrado para obten����o do grau de Mestre em Engenharia de Electr��nica e Telecomunica����es

An��lise e implementa����o de filtros e controladores num sistema de processamento digital de sinal

Disserta����o para obten����o do grau de Mestre em Engenharia Electrot��cnica Ramo de Automa����o e Electr��nica Industrial

A New Approach in the Design of Air Stripping Columns for the Treatment of Groundwater Contaminated With Volatile Organic Compounds

Volatile organic compounds are a common source of groundwater contamination that can be easily removed by air stripping in columns with random packing and using a counter-current flow between the phases. This work proposes a new methodology for column design for any type of packing and contaminant which avoids the necessity of an arbitrary chosen diameter. It also avoids the employment of the usual graphical Eckert correlations for pressure drop. The hydraulic features are previously chosen as a project criterion. The design procedure was translated into a convenient algorithm in C++ language. A column was built in order to test the design, the theoretical steady-state and dynamic behaviour. The experiments were conducted using a solution of chloroform in distilled water. The results allowed for a correction in the theoretical global mass transfer coefficient previously estimated by the Onda correlations, which depend on several parameters that are not easy to control in experiments. For best describe the column behaviour in stationary and dynamic conditions, an original mathematical model was developed. It consists in a system of two partial non linear differential equations (distributed parameters). Nevertheless, when flows are steady, the system became linear, although there is not an evident solution in analytical terms. In steady state the resulting ODE can be solved by analytical methods, and in dynamic state the discretization of the PDE by finite differences allows for the overcoming of this difficulty. To estimate the contaminant concentrations in both phases in the column, a numerical algorithm was used. The high number of resulting algebraic equations and the impossibility of generating a recursive procedure did not allow the construction of a generalized programme. But an iterative procedure developed in an electronic worksheet allowed for the simulation. The solution is stable only for similar discretizations values. If different values for time/space discretization parameters are used, the solution easily becomes unstable. The system dynamic behaviour was simulated for the common liquid phase perturbations: step, impulse, rectangular pulse and sinusoidal. The final results do not configure strange or non-predictable behaviours.

Development of a system to monitor surfer���s balance and plantar pressure and surfboard���s movement

O uso da tecnologia tem crescido nas ��ltimas d��cadas nas mais diversas ��reas, seja na ind��stria ou no dia-a-dia, e �� cada vez mais evidente os benef��cios que traz. No desporto n��o �� diferente. Cada dia surgem novos desenvolvimentos objetivando a melhoria do desempenho dos praticantes de atividades f��sicas, possibilitando atingir resultados nunca antes pensados. Al��m disto, a utiliza����o da tecnologia no desporto permite a obten����o de dados biomec��nicos que podem ser utilizados tanto no treinamento quando na melhoria da qualidade de vida dos atletas auxiliando na preven����o de les��es, por exemplo. Deste modo, o presente projeto se aplica na ��rea do desporto, nomeadamente, na modalidade do surfe, onde a aus��ncia de trabalhos cient��ficos ainda �� elevada, aliando a tecnologia eletr��nica ao desporto para quantificar informa����es at�� ent��o desconhecidas. Tr��s fatores b��sicos de desempenho foram levantados, sendo eles: equil��brio, posicionamento dos p��s e movimenta����o da prancha de surfe. Estes fatores levaram ao desenvolvimento de um sistema capaz de medi-los dinamicamente atrav��s da medi����o das for��as plantares e da rota����o da prancha de surfe. Al��m da medi����o dos fatores, o sistema �� capaz de armazenar os dados adquiridos localmente atrav��s de um cart��o de mem��ria, para posterior an��lise; e tamb��m envi��-los atrav��s de uma comunica����o sem fio, permitindo a visualiza����o do centro de press��es plantares; dos ��ngulos de rota����o da prancha de surfe; e da ativa����o dos sensores; em tempo real. O dispositivo consiste em um sistema eletr��nico embarcado composto por um microcontrolador ATMEGA1280; um circuito de aquisi����o e condicionamento de sinal anal��gico; uma central inercial; um m��dulo de comunica����o sem fio RN131; e um conjunto de sensores de for��a Flexiforce. O firmware embarcado foi desenvolvido em linguagem C. O software Matlab foi utilizado para rece����o de dados e visualiza����o em tempo real. Os testes realizados demostraram que o funcionamento do sistema atende aos requisitos propostos, fornecendo informa����o acerca do equil��brio, atrav��s do centro de press��es; do posicionamento dos p��s, atrav��s da distribui����o das press��es plantares; e do movimento da prancha nos eixos pitch e roll, atrav��s da central inercial. O erro m��dio de medi����o de for��a verificado foi de -0.0012 �� 0.0064 N, enquanto a m��nima dist��ncia alcan��ada na transmiss��o sem fios foi de 100 m. A pot��ncia medida do sistema foi de 330 mW.

Simula����o de Rob��s Quadr��pedes Utilizando o SimMechanics

Desde sempre o Homem procurou automatizar tarefas repetitivas. Tanto na ind��stria como no sector dom��stico ou de com��rcio est��o constantemente a surgir novos equipamentos procurando aumentar o n��vel de automa����o de diversas tarefas. A necessidade de empresas criadoras de produtos inovadores se manterem concorrenciais obrigou �� adop����o de m��todos de projecto e planeamento mais estruturados e eficientes que eliminem os desperd��cios tanto de material como de tempo. Diversas constru����es em termos or��amentais e o aumento da procura de produtos de alta qualidade a baixo custo deu origem a um novo tipo de programas, os programas de simula����o virtual. Tal como na ind��stria, tamb��m na investiga����o nas Institui����es de Ensino Superior se procuram adoptar os m��todos de trabalho mais eficientes poss��veis. Uma parte dos programas de simula����o rob��tica utilizados hoje em dia na investiga����o no Instituto Superior de Engenharia do Porto est��o concebidos em linguagem C. Embora esta linguagem seja extremamente capaz, existem m��todos mais adequados de simula����o que aceleram o processo de modela����o permitindo a visualiza����o do movimento e simula����o de diversas situa����es potencialmente criticas sem existir a necessidade de constru����o de um prot��tipo funcional do rob��. Durante o ��ltimo ano, este projecto permitiu construir um modelo de um rob�� quadr��pede num programa de simula����o virtual chamado Simmechanics���. Embora haja j�� algum trabalho desenvolvido nesta ��rea, constatou-se que a informa����o existente possu��a algumas lacunas. Com o trabalho desenvolvido preparou-se esta disserta����o que pretende clarificar algumas quest��es que surgem na modela����o de um rob��. Neste documento explica-se como modelar um rob�� de corpo flex��vel, modelar as pernas e as respectivas juntas da anca e do joelho assim como tamb��m se apresenta a modela����o de um contacto com o solo recorrendo a um modelo descrito na literatura. Este documento foi escrito a pensar no leitor, procurando-se explicar de forma simples mas concisa os diversos passos necess��rios para construir um modelo virtual de um rob��. O autor espera, desta forma, ajudar futuros colegas que pretendam trabalhar com o Simmechanics��� a mais facilmente se integrarem com o programa aumentando desta forma o declive da curva de aprendizagem e permitindo um maior aproveitamento desta ferramenta.

Automatic delimitation of the clinical region of interest in ultra-wide field of view images of the retina

Retinal ultra-wide field of view images (fundus images) provides the visu-alization of a large part of the retina though, artifacts may appear in those images. Eyelashes and eyelids often cover the clinical region of interest and worse, eye-lashes can be mistaken with arteries and/or veins when those images are put through automatic diagnosis or segmentation software creating, in those cases, the appearance of false positives results. Correcting this problem, the first step in the development of qualified auto-matic diseases diagnosis programs can be done and in that way the development of an objective tool to assess diseases eradicating the human error from those processes can also be achieved. In this work the development of a tool that automatically delimitates the clinical region of interest is proposed by retrieving features from the images that will be analyzed by an automatic classifier. This automatic classifier will evaluate the information and will decide which part of the image is of interest and which part contains artifacts. The results were validated by implementing a software in C# language and validated through a statistical analysis. From those results it was confirmed that the methodology presented is capable of detecting artifacts and selecting the clin-ical region of interest in fundus images of the retina.

Parallelization of kinetic Monte Carlo algorithm to simulate AL3Sc precipitation

The present paper reports the precipitation process of Al3Sc structures in an aluminum scandium alloy, which has been simulated with a synchronous parallel kinetic Monte Carlo (spkMC) algorithm. The spkMC implementation is based on the vacancy diffusion mechanism. To filter the raw data generated by the spkMC simulations, the density-based clustering with noise (DBSCAN) method has been employed. spkMC and DBSCAN algorithms were implemented in the C language and using MPI library. The simulations were conducted in the SeARCH cluster located at the University of Minho. The Al3Sc precipitation was successfully simulated at the atomistic scale with the spkMC. DBSCAN proved to be a valuable aid to identify the precipitates by performing a cluster analysis of the simulation results. The achieved simulations results are in good agreement with those reported in the literature under sequential kinetic Monte Carlo simulations (kMC). The parallel implementation of kMC has provided a 4x speedup over the sequential version.

Dete����o de colis��es com guardas de seguran��a

Disserta����o de mestrado integrado em Engenharia Eletr��nica Industrial e Computadores

BiYacc: Roll your parser and reflective printer into one

In: A. Cunha, E. Kindler (eds.): Proceedings of the Fourth International Workshop on Bidirectional Transformations (Bx 2015), L���Aquila, Italy, July 24, 2015, published at http://ceur-ws.org

Towards an engine for coordination-based architectural reconfigurations

Software recon���gurability became increasingly relevant to the architectural process due to the crescent dependency of modern societies on reliable and adaptable systems. Such systems are supposed to adapt themselves to surrounding environmental changes with minimal service disruption, if any. This paper introduces an engine that statically applies recon���gurations to (formal) models of software architectures. Recon���gurations are speci���ed using a domain speci���c language��� ReCooPLa���which targets the manipulation of software coordinationstructures,typicallyusedinservice-orientedarchitectures(soa).Theengine is responsible for the compilation of ReCooPLa instances and their application to the relevant coordination structures. The resulting con���gurations are amenable to formal analysis of qualitative and quantitative (probabilistic) properties.