ROAZ and ROAZ II Autonomous Surface Vehicle Design and Implementation

International Lifesaving Congress 2007, La Coruna, Spain, December, 2007

ROAZ Autonomous Surface Vehicle Design and Implementation

The design of an Autonomous Surface Vehicle for operation in river and estuarine scenarios is presented. Multiple operations with autonomous underwater vehicles and support to AUV missions are one of the main design goals in the ROAZ system. The mechanical design issues are discussed. Hardware, software and implementation status are described along with the control and navigation system architecture. Some preliminary test results concerning a custom developed thruster are presented along with hydrodynamic drag calculations by the use of computer fluid dynamic methods.

Design of the ISePorto robocup Middle-Size League Robotic Soccer Team: Control, Localisation and Coordination

Proceedings of the 10th Mediterranean Conference on Control and Automation - MED2002 Lisbon, Portugal, July 9-12, 2002

A New ROV Design: Issues on Low Drag and Mechanical Symmetry

This paper reports the design of a new remotely operated underwater vehicle (ROV), which has been developed at the Underwater Systems and Technology Laboratory (USTL) - University of Porto. This design is contextualized on the KOS project (Kits for underwater operations). The main issues addressed here concern directional drag minimization, symmetry, optimized thruster positioning, stability and layout of ROV components. This design is aimed at optimizing ROV performance for a set of different operational scenarios. This is achieved through modular configurations which are optimized for each different scenario.

Comunicar o Fim de Vida...O Papel do Enfermeiro Face à Comunicação de Falecimento à Família

Habitualmente ninguém gosta de ser portador de más notícias... especialmente notícias de falecimento, não só pelo que elas representam para quem as recebe, mas também para quem as transmite. Os profissionais que comunicam estas notícias à família, sentem, na maioria das vezes, dificuldade em adequar o modo de as expressar, e em gerir todos os sentimentos que estes momentos podem desencadear. Esta dificuldade poderá estar relacionada com a falta de formação dos profissionais nesta área, sendo importante o desenvolvimento de competências que lhes permitam lidar com estas situações.

Fundação Arpad Szenes- Viera da Silva: contributos para a investigação e comunicação

Relatório de Estágio apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Museologia

As Novas Tecnologias da Informação e Comunicação ao serviço da Intercompreensão na União Europeia

A União Europeia tem vindo a promover a intercompreensão entre países, povos e culturas que fazem parte da sua esfera comunicativa. Esta promoção passa por projectos educativos como o ERASMUS, COMENIUS e SOCRATES, permitindo a livre mobilidade de cidadãos em prol da troca de saberes e experiência de realidades educativas. Contudo, os elevados custos que tais programas acarretam, levaram a União Europeia a procurar alternativas e, como tal, nada melhor que utilizar os recursos das novas tecnologias da informação e comunicação, que constituem um inovador instrumento do ambiente de ensino-aprendizagem, já que contribuem para um profundo e vasto desenvolvimento cognitivo. Esta “mobilidade on-line” (Cruz & Melo, 2004) beneficia de uma grande independência temporal, uma vez que os chatantes actuam em momentos distintos e também de uma independência local, visto que, os intervenientes podem estar em locais diversos. Contudo, é necessário ao cidadão comum saber como se deve mover nos meandros da Internet, ou seja, é necessário que domine não só a tecnologia adjacente à navegação na Internet e salas de chat, bem como também alguns dos códigos linguísticos que fazem partem da esfera comunicativa da União Europeia. Refiro-me aqui a uma literacia ou multiliteracia electrónica que engloba os códigos e usos próprios do mundo virtual e a mobilização de uma competência plurilingue e intercultural aquando da comunicação síncrona mediatizada por computador.

A Fractional Calculus Perspective in the Evolutionary Design of Combinational Circuits

This paper analyses the performance of a genetic algorithm (GA) in the synthesis of digital circuits using two novel approaches. The first concept consists in improving the static fitness function by including a discontinuity evaluation. The measure of variability in the error of the Boolean table has similarities with the function continuity issue in classical calculus. The second concept extends the static fitness by introducing a fractional-order dynamical evaluation.

Design of Digital Fractional-Order Integrators and Differentiators by Least Squares

First IFAC Workshop on Fractional Differentiation and Its Application - 19-21 July 2004, Enseirb, Bordeaux, France - FDA'04

Simple Kinematic Design for Evading the Forced Oscillation of a Car-Wheel Suspension System

An adaptive control damping the forced vibration of a car while passing along a bumpy road is investigated. It is based on a simple kinematic description of the desired behavior of the damped system. A modified PID controller containing an approximation of Caputo’s fractional derivative suppresses the high-frequency components related to the bumps and dips, while the low frequency part of passing hills/valleys are strictly traced. Neither a complete dynamic model of the car nor ’a priori’ information on the surface of the road is needed. The adaptive control realizes this kinematic design in spite of the existence of dynamically coupled, excitable internal degrees of freedom. The method is investigated via Scicos-based simulation in the case of a paradigm. It was found that both adaptivity and fractional order derivatives are essential parts of the control that can keep the vibration of the load at bay without directly controlling its motion.

Atividade tradutológica: a (r)evolução dos últimos 20 anos

Trabalho de natureza profissional para a atribuição do Título de Especialista do Instituto Politécnico do Porto, na área de Línguas e Cuturas - Línguas e Literaturas Estrangeiras, defendido a 11-11-2015.

Design a computer programming learning environment for Massive Open Online Courses

Teaching and learning computer programming is as challenging as difficult. Assessing the work of students and providing individualised feedback to all is time-consuming and error prone for teachers and frequently involves a time delay. The existent tools and specifications prove to be insufficient in complex evaluation domains where there is a greater need to practice. At the same time Massive Open Online Courses (MOOC) are appearing revealing a new way of learning, more dynamic and more accessible. However this new paradigm raises serious questions regarding the monitoring of student progress and its timely feedback. This paper provides a conceptual design model for a computer programming learning environment. This environment uses the portal interface design model gathering information from a network of services such as repositories and program evaluators. The design model includes also the integration with learning management systems, a central piece in the MOOC realm, endowing the model with characteristics such as scalability, collaboration and interoperability. This model is not limited to the domain of computer programming and can be adapted to any complex area that requires systematic evaluation with immediate feedback.