Artigos de Revista

Mediante o desafio de fomentar a relevância da investigação em sistemas de informação, sem por em causa o seu rigor, este artigo analisa os conceitos de rigor e de relevância da investigação, assim como as perspectivas existentes sobre as possibilidades de conjugação derigor e relevância em processos de investigação.Verificando-se que alguma da investigação mais rigorosa não atrai, tanto quanto seria desejável,o interesse de parte da sua audiência por falta de relevância, este artigo compila um conjunto derecomendações para que os investigadores em sistemas de informação desenvolvaminvestigação não só rigorosa mas também relevante. Considerando os objectivos doinvestigador, nomeadamente o nível de rigor e relevância pretendidos e os recursos disponíveispara o processo de investigação, este artigo discute o impacto da escolha por inovaçãoincremental, modular, arquitectural e radical nas perspectivas de exequibilidade de rigor e relevância. Assim, a discussão e as considerações finais deste trabalho deverão constituir contributo satisfatoriamente rigoroso e relevante para os investigadores em sistemas de informação.

Two years of offshore wave data and daily time exposure images from Trafalgar beach, a 2-km-long sandy beach located on the southwest coast of Spain that frequently exhibits rhythmic features, were used to (1) explore the variability of the beachface morphology and (2) determineenvironmental conditions associated with the different morphological states. The beachface morphology at three distinct alongshore sectors wasanalyzed and classified and five different morphological states were found that are related with the presence or absence of beach cusps and a berm:(1) large beach cusps, (2) small beach cusps, (3) low-tide terrace; (4) plane beach berm and (5) plane beach. The predominant beachface morphology is characterized by the presence of large beach cusps, and the main wave climate consisted of offshore significant wave heights ranging from 0.5

Os sectores da indústria cerâmica e da construção contribuem de forma significativa para a economia portuguesa. No entanto, são uma ameaça para o meio ambiente face ao elevado montante de subprodutos e resíduos por eles gerado, à consequente deposição em aterro, ao desperdício energético e à agressão causada pela exploração de matérias-primas que, embora existam ainda em quantidade e qualidade, são recursos esgotáveis.

Work undertaken in the EU HUMOR project on morphodynamical modelling, particularly with regard to simulating and understandingrhythmic surf zone bars and related morphodynamic self-organization, is presented. These features are reviewed and their engineering contextstated. Hydrodynamical and morphodynamical models developed and/or applied within the HUMOR project in order to address these issues arebriefly presented. The linear stability modelling concept and stability studies using fully nonlinear models are contrasted. The stability of a shoreparallelbar under normal or oblique wave incidence is chosen as a test case for the different models. The results are compared and discussed.Lastly, modelling efforts and main results from the project are summarized. Recommendations for further work are made.

This study aims at showing the sedimentary and geomorphological records of wave climate variations by spits. The studied spit (Arçay Spit) is located on the French Atlantic coast and has displayed a rapid elongationsince the beginning of the 19th century that potentially represents a two century-long wave climate record.Wave climate and spit growth relationships are studied from two complementary methods: (1) numerical modelling of wave and longshore transport temporal and spatial variabilities, and (2) morphologicalmonitoring based on the analysis of 4 historical maps (1811

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Stone masonry in historical buildings. Ways to increase their resistance and durability

Digital preservation aims at maintaining digital objects anddata accessible over long periods of time. Data grids provide severalfunctionalities required by digital preservation systems, especially whenmassive amounts of data must be preserved, as in e-Science domains. Wepropose the use of existing data grid solutions to build frameworks fordigital preservation. In this paper we survey the main threats to digitalpreservation, which are used to identify a central point of failure in themetadata catalog of the iRODS data grid solution. We propose threeextensions to the iRODS framework, to overcome the shortcomings ofiRODS when used as a digital preservation system.

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