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Lisbon, Portugal

Simoes-Marques M.J.,Portuguese Navy
Occupational Safety and Hygiene II - Selected Extended and Revised Contributions from the International Symposium Occupational Safety and Hygiene, SHO 2014 | Year: 2014

Emergency Management in the context of Disaster Relief operations places problems that are at the cross roads of many knowledge domains and involve many actors. Emergency Management is a complex process which calls for decision support tools. This paper discusses the characteristics Emergency Management Intelligent Systems should offer, and presents a fuzzy multicriteria methodology which can be used in the development of such systems. © 2014 Taylor & Francis Group, London, UK.

Simoes-Marques M.,Portuguese Navy
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

Usability is a very important issue that affects the effectiveness and success of systems. Such importance becomes particularly critical when systems are complex, and when the accuracy and timeliness of operation is decisive to the system outputs. Naturally, the usability of decision support systems used for emergency management is of utmost relevance. The present paper addresses a usability study performed to the Portuguese Navy SINGRAR system. © 2013 Springer-Verlag Berlin Heidelberg.

Dias Marques F.S.B.,Polytechnic University of Catalonia | Dias Marques F.S.B.,Portuguese Navy | Marin J.E.M.,Polytechnic University of Catalonia | Ortega O.D.,University of Lisbon
IC3K 2015 - Proceedings of the 7th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management | Year: 2015

Information Sharing (IS) is essential for organizations to obtain information in a cost-effective way. If the existing information is not shared among the organizations that hold it, the alternative is to develop the necessary capabilities to acquire, store, process and manage it, which will lead to duplicated costs, especially unwanted if governmental organizations are concerned. The European Commission has elected IS among public administrations as a priority, has launched several IS initiatives, such as the EUCISE2020 project within the roadmap for developing the maritime Common Information Sharing Environment (CISE), and has defined the levels of interoperability essential for IS, which entail Semantic Interoperability (SI). An open question is how can IS performance be managed? Specifically, how can IS as-is, and to-be states and targets be defined, and how can organizations progress be monitored and controlled? In this paper, we propose 11 indicators for assessing SI that contribute to answering these questions. They have been demonstrated and evaluated with the data collected through a questionnaire, based on the CISE information model proposed during the CoopP project, which was answered by five public authorities that require maritime surveillance information and are committed to share information with each other. © 2015 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

Bugio T.M.A.,New University of Lisbon | Martins R.F.,New University of Lisbon | Martins R.F.,University of Lisbon | Leal das Neves L.,Portuguese Navy
Engineering Failure Analysis | Year: 2013

This manuscript describes a failure analysis carried out in fuel tanks of a lightweight ship that was designed to operate not far from shore. The ship under study is a high speed light craft that was entirely designed and manufactured in Portugal and has been successfully operating as a patrol boat for several years. The vessel under study was manufactured with two types of naval aluminium series alloys, namely the 5083-H111 and the 6082-T6 alloys, which are commonly used in shipbuilding. The former alloy can be strain hardened by cold work and is used in the form of rolled plates and sheets for the vessel hull, the superstructure, and the bulkheads. The 6082-T6 alloy is a high-strength alloy that can be heat treated and softens near the heat affected zone during welding. It is used in the high-stressed structural members of the ship, namely in the stiffeners of the reinforced panels. The two fuel tanks under study are located at the rear of the ship, one at the starboard and the other at the portside. Cracks have propagated from the weld toe of some T-welded joints that possess low fatigue strength resistance. The welded joints were made using TIG and MIG processes and the weld quality was assessed by visual inspection, dye penetrant examination and radiography. The fuel tank's failure due to exfoliation, hot cracking, stress corrosion cracking or fatigue are analysed in the paper and it was concluded that fatigue is the most probable cause of failure. In addition, the 3D modelling of the current fuel tank geometry and its analysis by the finite element method (FEM) allowed the behaviour of the structure to be studied and it was discovered that the highest stressed regions were located at the reinforcement stiffeners where cracks nucleated and propagated. As a result, several alternative geometries for the fuel tanks were simulated in a FE computer code and it was possible to reduce the overall maximum stresses applied in the structure in the order of 65% with an increase of 20. kg per fuel tank to the total weight of the vessel. © 2013 Elsevier Ltd.

Martins R.,University of Porto | De Sousa J.B.,University of Porto | Afonso C.C.,Portuguese Navy
Sea Technology | Year: 2011

The NATO Undersea Research Center (NURC) has devised the Recognized Environmental Picture 2010 experiment. It was to take place in the Alboran Sea with participants from 10 nations representing 27 organizations. The REP-AUV10 experiment was organized and planned by the Portuguese Navy in cooperation with Porto University the Naval Undersea Warfare Center Newport (NUWC), the Naval Research Laboratory and NURC. NURC participated in the event by producing remote-sensing bathymetry. The Naval Research Laboratory provided 72- hour forecasts for environmental modeling of sonar performance, general environmental characterization and thresholding for AUV operations. This information was uploaded daily to a dedicated FTP site created for the event. SeaCon AUV Based on evolutions of the Light Autonomous Vehicle developed by Porto University, the SeaCon AUV is targeted at innovative standalone or networked operations for applications in mine warfare, oceanography, mapping and rapid environmental assessment.

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