Using balanced scorecards to evaluate the data warehouse system utility

Dissertação de mestrado em Systems Engineering

An innovative framework for probabilistic-based structural assessment with an application to existing reinforced concrete structures

A novel framework for probabilistic-based structural assessment of existing structures, which combines model identification and reliability assessment procedures, considering in an objective way different sources of uncertainty, is presented in this paper. A short description of structural assessment applications, provided in literature, is initially given. Then, the developed model identification procedure, supported in a robust optimization algorithm, is presented. Special attention is given to both experimental and numerical errors, to be considered in this algorithm convergence criterion. An updated numerical model is obtained from this process. The reliability assessment procedure, which considers a probabilistic model for the structure in analysis, is then introduced, incorporating the results of the model identification procedure. The developed model is then updated, as new data is acquired, through a Bayesian inference algorithm, explicitly addressing statistical uncertainty. Finally, the developed framework is validated with a set of reinforced concrete beams, which were loaded up to failure in laboratory.

Conceção técnica e avaliação económica de um veículo solar para venda de produtos refrigerados

Dissertação de mestrado integrado em Engenharia Mecânica

Composition and structure variation for magnetron sputtered tantalum oxynitride thin films, as function of deposition parameters

Tantalum oxynitride thin films were produced by magnetron sputtering. The films were deposited usinga pure Ta target and a working atmosphere with a constant N2/O2ratio. The choice of this constant ratiolimits the study concerning the influence of each reactive gas, but allows a deeper understanding of theaspects related to the affinity of Ta to the non-metallic elements and it is economically advantageous.This work begins by analysing the data obtained directly from the film deposition stage, followed bythe analysis of the morphology, composition and structure. For a better understanding regarding theinfluence of the deposition parameters, the analyses are presented by using the following criterion: thefilms were divided into two sets, one of them produced with grounded substrate holder and the otherwith a polarization of −50 V. Each one of these sets was produced with different partial pressure of thereactive gases P(N2+ O2). All the films exhibited a O/N ratio higher than the N/O ratio in the depositionchamber atmosphere. In the case of the films produced with grounded substrate holder, a strong increaseof the O content is observed, associated to the strong decrease of the N content, when P(N2+ O2) is higherthan 0.13 Pa. The higher Ta affinity for O strongly influences the structural evolution of the films. Grazingincidence X-ray diffraction showed that the lower partial pressure films were crystalline, while X-rayreflectivity studies found out that the density of the films depended on the deposition conditions: thehigher the gas pressure, the lower the density. Firstly, a dominant -Ta structure is observed, for lowP(N2+ O2); secondly a fcc-Ta(N,O) structure, for intermediate P(N2+ O2); thirdly, the films are amorphousfor the highest partial pressures. The comparison of the characteristics of both sets of produced TaNxOyfilms are explained, with detail, in the text.

Património natural e arquitectónico: plano de intervenção na aldeia de Ermelo

Dissertação de mestrado integrado em Arquitectura (área de especialização em Cidade e Território)

Aplicação web para configuração e acesso a câmaras ONVIF

Dissertação de mestrado integrado em Engenharia Eletrónica Industrial e Computadores

Modelo de avaliação do impacto das TSI na produtividade das organizações

Dissertação de mestrado em Sistemas de Informação

MemoBoard familiar

Dissertação de mestrado integrado em Engenharia e Gestão de Sistemas de Informação

Systems biology approaches for the design of novel Saccharomyces cerevisiae winemaking strains for enhanced flavour compounds synthesis

Tese de Doutoramento em Biologia Ambiental e Molecular

Exploring scenario exploration

Model finders are very popular for exploring scenarios, helping users validate specifications by navigating through conforming model instances. To be practical, the semantics of such scenario exploration operations should be formally defined and, ideally, controlled by the users, so that they are able to quickly reach interesting scenarios. This paper explores the landscape of scenario exploration operations, by formalizing them with a relational model finder. Several scenario exploration operations provided by existing tools are formalized, and new ones are proposed, namely to allow the user to easily explore very similar (or different) scenarios, by attaching preferences to model elements. As a proof-of-concept, such operations were implemented in the popular Alloy Analyzer, further increasing its usefulness for (user-guided) scenario exploration.

Da experiência narrativa em diferentes media

No decorrer das últimas décadas, com o avanço das tecnologias de comunicação audiovisual, temos assistido a uma discussão sobre a utilidade de outros meios de expressão que não os audiovisuais, e nos últimos anos com a pressão económica da cultura dos videojogos, assiste-se mesmo à ideia de que tudo pode e deve ser comunicado audiovisualmente e interactivamente. Nesse sentido, este texto pretende lançar algumas ideias sobre o uso de diferentes media na comunicação narrativa, nomeadamente levando em conta o tipo de conteúdo que se pretende transmitir.

Da utilização e análise de dados de Geofísica em contextos arqueológicos: o Castro de Sapelos (Boticas) e o Seminário Conciliar de São Pedro e São Paulo (Braga)

Dissertação de mestrado em Arqueologia

Controlo e limites dos princípios constitucionais da proporcionalidade e da igualdade no contexto da inspeção tributária

Dissertação de mestrado em Direito Tributário e Fiscal

A narrativa na encruzilhada: a questão da fidelidade na adaptação de obras literárias ao cinema

Relatório de projecto de investigação de mestrado em Ciências da Comunicação (área de especialização em Audiovisual e Multimédia)

Automated network resilience optimization using computational intelligence methods

This paper presents an automated optimization framework able to provide network administrators with resilient routing configurations for link-state protocols, such as OSPF or IS-IS. In order to deal with the formulated NP-hard optimization problems, the devised framework is underpinned by the use of computational intelligence optimization engines, such as Multi-objective Evolutionary Algorithms (MOEAs). With the objective of demonstrating the framework capabilities, two illustrative Traffic Engineering methods are described, allowing to attain routing configurations robust to changes in the traffic demands and maintaining the network stable even in the presence of link failure events. The presented illustrative results clearly corroborate the usefulness of the proposed automated framework along with the devised optimization methods.