ICT and e-Business in the Construction Industry
This sector study by e-Business W@tch focuses on the construction industry (CI). It describes how enterprises in this industry use information and communications technology (ICT) for conducting business, assesses the impact of this development for firms and for the industry as a whole, and indicates possible implications for policy. Analysis is based on literature, interviews, case studies and a survey among decisionmakers in European enterprises from the CI about the ICT use of their enterprise. The sector covers the business activities specified in NACE Rev. 1.1 Groups F 45.2 and 45.3.1 The building of complete constructions (or parts thereof) and...
Linking police and hospital road accident records: how consistent can it be? - Marco Raul Soares Amorim; Sara Ferreira; António Fidalgo Couto
This paper presents the description of various steps to be applied in the linkage of road traffic accident records using the case study of the city of Porto, Portugal. The importance of this process is well recognized by institutions such as IRTAD (OECD/ITF) that are promoting the combination of various data sources to fully assess the consequences of road accidents and monitoring progress. The complexity of this process is mainly concerned with several issues found in the data sets; mistakes and missing values are frequently detected and there are only a few common data fields that can be matched by...
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.
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...
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...