Small Size AUVs: Operation Results and New Mission Concepts
- Nuno Cruz; Aníbal Matos; J. Borges de Sousa
Coordinated Operation of Autonomous Underwater and Surface Vehicles
- Aníbal Castilho Coimbra de Matos; Nuno Alexandre Cruz
Dynamic Optimization in the Coordination and Control of Autonomous Underwater Vehicles
- J. Borges de Sousa; Aníbal Matos; F. Lobo Pereira
The coordination and control problems arising in team composition and tasking of autonomous underwater vehicles are discussed in the framework of dynamic optimization. Team composition and tasking are specified in terms of sets and relations among the elements of these sets. Results from dynamic optimization and non-smooth analysis are used to show that these coordination and control problems can be phrased in terms of concepts such as invariance, solvability, monotonicity, and switchings among value functions.
icBench – a Benchmarking Tool for Portuguese Construction Industry Companies
- Jorge Moreira da Costa; Isabel Horta; Nuno Guimarães; Maria Henriqueta Nóvoa; João Falcão e Cunha
A equação da integração
- Francisco Varela; Jorge Moreira da Costa
Object-based spatial segmentation of video guided by depth and motion information
- Jaime S. Cardoso; Jorge C. S. Cardoso; Luís Corte-Real
MODELO INTEGRADO DE QUALIFICAÇÃO DE EDIFÍCIOS
- Jorge Moreira Da Costa; Hipólito Sousa; Ana Cunha; Pedro Magalhaes
A QUALIFICAÇÃO DE EDIFÍCIOS - EXPERIÊNCIAS E METODOLOGIAS
- Jorge Moreira Da Costa; Hipólito Sousa; Ana Cunha; Pedro Magalhaes
Differential Inclusion Approach for Mixed Constrained Problems Revisited
- Maria Do Rosário De Pinho; Igor Kornienko
Properties of control systems described by differential
inclusions are well established in the literature. Of
special relevance to optimal control problems are properties
concerning measurability, convexity, compactness of trajectories
and Lipschitz continuity of the multifunctions mapping defining the
differential inclusion of interest. In this work we concentrate
on dynamic control systems coupled with mixed state-control
constraints. We characterize a class of such systems that
can be described by an appropriate differential inclusion so
as exhibit ``good'' properties of the multifunction.
We also illustrate the importance of our findings by
treating some applications scenarios.
Representação de Objectos Móveis em Sistemas de Informação Geográfica
- José Moreira; Cristina Ribeiro
Os sistemas de informação geográfica (SIG) foram originalmente desenvolvidos para representar um estado único de uma dada realidade. No entanto, é cada vez maior o número de sistemas para os quais o tratamento de informação geográfica que varia ao longo do tempo é essencial. Estes sistemas são designados por espaço-temporais e, neste contexto, existe uma classe que tem assumido particular relevância: a representação de objectos móveis em SIG.
Nesta comunicação, são levantados alguns problemas que se colocam à representação da natureza contínua do movimento dos objectos em SIG. São abordadas soluções possíveis do ponto de vista do modelo de representação física...
Construção de Amostras de Dados do Twitter
- Tiago Magalhães; Sérgio Nunes
A Pattern-Based Approach for GUI Modeling and Testing
- Rodrigo Moreira; Ana C. R. Paiva; Atif Memon
User Interface (UI) patterns are used extensively in the design of today's software. UI patterns embody commonly recurring solutions that solve common GUI design problems, such as "login," "file-open," and "search." Yet, testing of GUIs for functional correctness has largely ignored UI patterns. This paper formalizes the notion of a Pattern-Based Graphical User Interface (GUI) Testing method (PBGT) for systematizing and automating the GUI testing process. The space of all possible interactions with a GUI is typically very large. PBGT presents a new methodology to sample the input space using "UI Test Patterns," that embody commonly recurring solutions to test...
Glass Science and its Applications - II
- Nandyala Sooraj Hussein; José Domingos Santos
Glass Science and its Applications
- Sooraj Hussein; José Domingos Santos
Quantificação em estudos SPECT com 123I-FP-CIT: determinação automática de índices de captação específica e análise dimensional das regiões de elevada captação
- Francisco P.M. Oliveira; Diogo Borges Faria; João Manuel R. S. Tavares; Durval C. Costa
Quantificação em estudos SPECT com 123I-FP-CIT – influência do método de reconstrução
- Diogo Borges Faria; Francisco P.M. Oliveira; João Manuel R. S. Tavares; Durval C. Costa
Basis for a National Strategy for ICZM - Portugal
- Fernando Veloso Gomes
This paper includes the proposals made in the report "Basis for a National Strategy for Coastal Zone Management" prepared for the Portuguese Ministry of Environment, Territorial Planning and Regional Development (MAOTDR). The final version of that report was presented in June 2006. This paper describes a theme framework followed by a discussion of concepts. Nine Primary Principles, eight Principal Objectives, and thirty-seven Strategic Options for an Integrated Coastal Zone Management are then presented. These Strategic Options are set hierarchically according to their sequential priority, identifying the dominant types of Associated Measures. The analysis of these arrives at a set of...
Web-based Decision Support System for Incorporating Geosynthetics in Coastal Protection Works
- Susana Maria Pereira Garcia; Maria de Lurdes Lopes; Fernando Veloso Gomes; Luciana das Neves
New Challenges for Coastal Governance in the Azores: Marine Clusters
- Luz Paramio; Fatima Alves; João Porteiro; Fernando Veloso Gomes
The European Union sustainability policies recently reaffirmed by the Lisbon Treaty, shows the makers concerns regarding the maritime sector. The overall approach proposed by the new European policy instruments aimed at reconciling environmental and economic interests both for the Marine and Coastal Zones. Thus, The Outermost regions of the Europe are highlighted over all documents, as areas of great strategic importance to marine management. In Portugal case, the Azores Archipelago has specific characteristics potency the development of a model of sustainability framed within the objectives of the European Marine Policy. Its marine space covered by the dispersion of its nine...
Analysis of the Portuguese west coast morphology and morphodynamics, based on aerial images and GIS tools
- Joaquim Barbosa; Fernando Veloso Gomes; Francisco Taveira Pinto
Several areas of the western coast of Portugal are undergoing severe erosion. Accurate
knowledge of coastal morphology and morphodynamic characteristics as well as their correlation
through time is of great importance, not only to identify coastal erosion hazards, but also to
understand more in-depth the movement of sediments and the action of currents, which are the
main coastal processes responsible for erosion.
The main goal of this work is to develop a tool capable of performing aerial image analysis,
visual and computed, of coastal forms and wave breaking zones The results of this analysis will be
integrated and made available through a GIS database. With this approach,...