40 documents found, page 1 of 4
A Reference Model for Artificial Intelligence Techniques in Stimulating Reasoni...
Santos, V.; Mamede, H.; Silveira, C.; Reis, L.Artificial Intelligence is increasingly being discussed as something essential and pressing in all aspects and areas of society. Its potential use in education is no exception. Artificial Intelligence, in particular, and technologies, in general, are unavoidable elements to be considered in the teaching-learning process at all levels of education and training. There are many initiatives, essentially exploratory...
Towards a Comprehensive Framework for the Multidisciplinary Evaluation of Organ...
Russo, N.; Reis, L.; Silveira, C.; Mamede, H.Organizational dependency on Information and Communication Technology (ICT) drives the preparedness challenge to cope with business process disruptions. Business Continuity Management (BCM) encompasses effective planning to enable business functions to resume to an acceptable state of operation within a defined timeframe. This paper presents a systematic literature review that communicates the strategic guideli...
Integrating the Sustainable Development Goals into Design Science Research: Imp...
Reis, L.; Silveira, C.; Salvado, T.The development of software applications assumes a leading role in the definition of sustainability strategies. Sustainable Software Engineering intends to provide a set of guidelines necessary to define, create and execute sustainable software applications. The paper aims to apply, in the early stages of the life cycle, the Sustainable Software Engineering approach integrated with the Design Science Research m...
Violence Against the Elderly: Social Representations of Portuguese and Brazilia...
Mendes, F.; Mestre, T.; Elaine, S.; Reis, L.; Lopes, mM.The increase in life expectancy and elderly people in society, coupled with changes in family structure, have highlighted the importance of formal and informal caregivers of elderly people. Objective: To analyse the social representations of violence against the elderly, of two groups of formal and informal caregivers. Methods: Exploratory, quantitative and qualitative research, supported by the theoretical-met...
Assessment of Replacement of Metal Parts by BFRP Composites into a Highly Effic...
Marat-Mendes, R.; Ribeira, D.; Reis, L.This work intends to evaluate the use of epoxy composite materials reinforced with basalt fibers as replacement to metallic mechanical parts of a highly efficient electrical prototype. The analysis of the behavior of the original metallic bracket was made and an optimization process was carried out in order to achieve the most suitable geometry and stacking sequence if produced in composite material. Finite ele...
Formability of wire-arc deposited AISI 316L sheets for hybrid additive manufact...
Pragana, João P. M.; Bragança, Ivo; Reis, L.; Silva, Carlos M. A.; Martins, P. A. F.This paper is focused on the formability of wire-arc additively manufactured AISI 316L stainless steel sheets with the purpose of analysing the feasibility of including this material in hybrid additive manufacturing chains involving sheet metal forming operations. Conventional tensile tests performed in specimens obtained from different orientations to the building direction were carried out to characterise the...
Evaluation and numerical modeling of phenomenological approach for AZ31B-F magn...
Moreira, R.; Anes, Vitor; Freitas, M. De; Reis, L.Magnesium alloys have been attractive to use in structural components due to their high strength to weight ratio, low density and high damping capacity. However, magnesium alloys show peculiar plastic deformation mechanisms under cyclic loads (twinning and de-twinning) that causes the asymmetric material behaviour and limits their use in structural components. Recent researches indicate that this type of plasti...
Failure analysis of cylinder head studs of a four stroke marine diesel engine
Fonte, M.; Reis, L.; Infante, V.; Freitas, M.After about seven years in service, four cylinder head studs, which tight the block and cylinder heads of a marine main engine, have fractured. Meantime, they were changed for new ones without to determine the root cause of failure. The aim of this research work is to carry out a failure analysis in order to avoid recurrent damages in that engine. The fracture morphology and thread roots of fractured studs were...
Failure mode analysis of a damaged diesel motor crankshaft
Afonso Fonte, M.; Reis, L.; Freitas, M.A case study of a catastrophic failure of a diesel motor crankshaft is presented. The aim of this failure analysis is to investigate the root cause of this important mechanical component. This crankshaft belonged to a particular vehicle (140 cv, at 4000 rpm, 1968 cm3 displacement) that fractured after 180,000 km and 8 years in service. The motor was disassembled, and the crankpin No. 3 and the main bearing cap ...
Flexural testing and analysis of fullstrain-fields in sandwich composites.
Marat-Mendes, R.; Martins, R.; Garcia, A.; Reis, L.The objective of this work was to characterize the full-field flexural behavior of composite sandwich beams. Finite element analysis was used to estimate the behavior of sandwich beams under three- and four-point-bending tests and were compared with experimental results obtained via digital image correlation and strain-gauges. Two different polyurethane core thicknesses and two different sandwich lengths were u...