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Drilling damage in composite material
Durão, Luís M.; Tavares, João Manuel R. S.; Albuquerque, Victor Hugo C. de; Marques, Jorge Filipe S.; Andrade, Oscar N.G.The characteristics of carbon fibre reinforced laminates have widened their use from aerospace to domestic appliances, and new possibilities for their usage emerge almost daily. In many of the possible applications, the laminates need to be drilled for assembly purposes. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, damage assessment...
Drilling Damage in Composite Material
Luís Miguel P. Durão; João Manuel R.S. Tavares; Victor Hugo C. de Albuquerque; Jorge Filipe S. Marques; Oscar N.G. AndradeThe characteristics of carbon fibre reinforced laminates have widened their use from aerospace to domestic appliances, and new possibilities for their usage emerge almost daily. In many of the possible applications, the laminates need to be drilled for assembly purposes. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, damage assessment...
O mercado de luxo e o marketing holístico: o caso dos hotéis de luxo
Filipe, S.; Simões, D.No atual contexto económico de crise, o mercado de luxo conseguiu cresceu, porque muitos dos clientes de luxo mantêm o poder financeiro e conservam a sua ambição por luxo. No entanto, num mercado caracterizado por intensa concorrência não é suficiente ter uma marca forte, é imprescindível acrescentar valor e o marketing holístico pode contribuir forte...
Signal Reconstruction Techniques Applied to Speech Transmission
Salviano Filipe S. P. Soares; Paulo Jorge S. G. FerreiraThe transmission of speech through a packet-based network may result in packets reaching the destination out of order and subject to unpredictable delays. For real-time reproduction, it is necessary to provide some means of dealing with the unavailable packets, to prevent communication failures. A correct sample at a wrong time is a wrong sample! (...)Keywords: oversampling; interpolation; interleaving; Et...
N-Acyl-3,3-difluoro-2-oxoindoles as versatile intermediates for the preparation...
Boechat,Núbia; Kover,Warner B.; Bastos,Mônica M.; Pinto,Angelo C.; Maciel,Lindalva C.; Mayer,Lúcia M. U.; Silva,Filipe S. Q. da; Sá,Paula M.This paper describes the versatility of N-Acyl-3,3-difluoro-2-oxoindoles, obtained from the the reaction of N-acylisatins with (diethylamino)sulphur trifluoride (DAST) which, on opening of the heterocyclic ring by reactions with nucleophiles, lead to the formation of a variety of products: reaction with water yields 2-(2-amidoacyl)-2,2-difluoroacetic acids, with alcohols yields alkyl 2-(2-amidoacyl)-2,2-difluor...
Biological treatment of a contaminated gaseous emission from a paint and varnis...
Bastos, Filipe S.C.; Castro, Paula M.L.; Jorge, Ruben FerreiraA Vapour-Phase Bioreactor (VPB), namely a biotrickling filter, was scaled-up and operated in-situ for the treatment of gaseous emissions from a paint and varnish industrial plant. A microbial culture able to degrade the target compounds was enriched and a laboratory-scale VPB was established in order to evaluate the treatment's performance. The VPB presented removal efficiencies higher than 90% when exposed to ...
Bases de poder, confiança na chefia e compromisso da equipa, em diferentes funç...
Lemos, Carlos Filipe S.Dissertação de mestrado em Comportamento Organizacional ; As organizações confrontam-se com envolventes cada vez mais competitivas e turbulentas. Neste cenário, os modos do saber fazer e os conhecimentos empíricos cruzam-se no dia a dia, sempre na procura da rentabilização e das melhores práticas de gestão. Procurámos neste estudo contribuir para esta sustentação, recorrendo a várias dimensões (poder, confianç...
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