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The volcanotectonic evolution of Flores Island, Azores (Portugal)
Azevedo, J. M. M.; Ferreira, M. R. PortugalFrom the study and interpretation of the volcanic products and structures of Flores Island, we infer that its volcanic history was dominated by two major periods: (1) proto-insular volcanism, which includes all the submarine and emergent activities; and (2) insular volcanism, consisting exclusively of subaerial eruptions. The first period includes two phases: (1) the oldest (2.2 to 1.5 Ma) of shallow submarine ...
Aplicação do balanço hídrico em combinação com a relação precipitação escoament...
Alencoão, Ana M.P.; Pacheco, Fernando António Leal; Portugal Ferreira, M.R.V.
A Bacia Hidrográfica do Rio Corgo (NE Portugal): Escoamento Subterrâneo e Parâm...
Alencoão, Ana M.P.; Pacheco, Fernando António Leal; Portugal Ferreira, M.R.V.
Volcanic gaps and subaerial records ofpalaeo-sea-levels on Flores Island (Azore...
Azevedo, J. M. M.; Ferreira, M. R. PortugalThe morphological evolution of Flores Island, as commonly observed for volcanicislands, suggests (1) the balance between constructive processes (effusive and moderatelyexplosive volcanic activities and tectonic uplifting movements) and destructive processes (marine abrasion, stream erosion, crater-forming volcanic explosions, caldera collapses andtectonic subsidence) and (2) the recurrent fluctuations of the se...
Research of the optical communications groups at University of Aveiro and Insti...
da Rocha, J.F.; Tavares, P.; Frazão, O.; Monteiro, P.; Andre, P.S.; Teixeira, A.; Lima, M.; Pinto, A.N.; Gameiro, A.; Ribeiro, R.; Ribeiro, L.This paper summarizes the research activities of the optical communications group at University of Aveiro and Institute of Telecommunications – Aveiro pole. Several activities like clock recovery systems, both electrical and all optical, electrical equalizers for very high bit rate DST systems, post-detection filters for multigigabit optical receivers, soliton systems, simulation work on WDM, DST, EDFA and shor...
Determination of iron in soils by flow injection atomic absorption spectrometry
Ferreira, M. R. Alexandra; Rangel, António O. S. S.; Lima, José L. F. C.A single-channel flow injection system was optimized for the determination of available iron (Fe) in soil extracts by atomic absorption spectrophotometry. This method of introducing the samples in the spectrophotometer worked particularly well in preventing blockage of the burner head which was observed in the conventional introduction of Fe for its determination by atomic absorption spectrophotometry. The appr...
A Heterogeneidade Hidrogeológica num Maciço de Rochas Metamórficas com Fractura...
Pacheco, Fernando António Leal; Alencoão, Ana M.P.; Sousa Oliveira, A.; Pires, C.P.; Portugal Ferreira, M.R.V.
Parâmetros Condicionantes da Descarga Natural em Maciços Fracturados
Alencoão, Ana M.P.; Sousa Oliveira, A.; Pacheco, Fernando António Leal; Portugal Ferreira, M.R.V.
Geohidrologia das Águas Bicarbonatadas e Gasocarbónicas em Portugal
Sousa Oliveira, A.; Pacheco, Fernando António Leal; Alencoão, Ana M.P.; Portugal Ferreira, M.R.V.
Groundwater in Metamorphic Rocks with Systematic Fractures: Inhomogeneous Systems
Portugal Ferreira, M.R.V.; Pacheco, Fernando António Leal
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