Encontrados 54 documentos, a visualizar página 1 de 6
Valorização agrícola de resíduos orgânicos de pecuária: avaliação da fitodispon...
Monteiro, M.C.H.; Ribeiro, P.; Batista, M.; Carneiro, J.P.; Roboredo, M.; Torrent, J.Este trabalho teve como objetivo avaliar a adequação de dois métodos analíticos, o método de Olsen (Olsen-P) e o método de Egnér-Riehm (AL-P), na quantificação do fósforo(P) fitodisponível, após aplicação ao solo, num ensaio de campo, de resíduos orgânicos de pecuária como fertilizantes.
Animal manures applied to soil: phosphorus bioavailability, losses to water and...
Monteiro, M.C.H.; Ribeiro, P.; Batista, M.; Carneiro, J.P.; Duarte, A.C.; Roboredo, M.; Torrent, J.; Sharpley, A.Comunicação oral da qual só está disponível o resumo. ; Phosphorus (P) is a non renewable resource which highlights the significance of developing and using alternative sources of P for a sustainable agriculture. Animal manure is an option but its application to soils to meet crop nitrogen needs requires careful management practices to minimize freshwater eutrophication. The aim of this work was to evaluate th...
A selective phase filter based on speckle decorrelation
Lopes, H.; Ribeiro, J.E.; Santos, J.; Vaz, M.A new phase filter technique based on the speckle decorrelation analysis is proposed on this paper to remove the noise from the phase maps. The phase maps are extracted from speckle interferometry static measurements using the four phase shifted intensities, with the constant phase step of π/2. The speckle descorrelation points are then selected based on the average phase step of the reference and deformation s...
A selective phase filter based on speckle decorrelation
Lopes, H.; Ribeiro, J.E.; Santos, J.V. dos; Vaz, M.A.P.A new phase filter technique based on the speckle decorrelation analysis is proposed on this paper to remove the noise from the phase maps. The phase maps are extracted from speckle interferometry static measurements using the four phase shifted intensities, with the constant phase step of π/2. The speckle descorrelation points are then selected based on the average phase step of the reference and deformation s...
Damage identification using real time rotating field analysis
Lopes, H.; Ribeiro, J.E.; Santos, J.V.A. dos; Vaz, M.A.P.; Gomes, J.F.S.This paper proposes a real time damage identification method based on the perturbation analysis of the rotation field, which are measured using shearography technique. A particular case of phase modulation method is applied to the interference pattern in order to improve the spatial resolution of the rotation field. A program was developed in Matlab® platform for digital recording the information capture by CCD...
Damage identification using real time rotating field analysis
Lopes, H.; Ribeiro, J.E.; Santos, J.; Vaz, M.; Gomes, J.S.This paper proposes a real time damage identification method based on the perturbation analysis of the rotation field, which are measured using shearography technique. A particular case of phase modulation method is applied to the interference pattern in order to improve the spatial resolution of the rotation field. A program was developed in Matlab® platform for digital recording the information capture by CCD...
Ciclo do fósforo em agroecossistemas: Efeito da fertilização fosfatada com adub...
Monteiro, M.C.H.; Ribeiro, P.; Carneiro, J.P.; Duarte, A.C.; Batista, M.S.; Roboredo, M.Comunicação oral da qual só está disponível o resumo. ; Ciclo do fósforo em agroecossistemas: Efeito da fertilização fosfatada com adubos minerais ou com resíduos orgânicos de pecuária.
As rochas graníticas desde Castelo Branco a Portalegre
Antunes, I. Margarida H. Ribeiro; Solá, Ana Rita
Compositional trends in tourmalines from granites and quartz-tourmaline rocks f...
Costa, Isabel Ribeiro da; Antunes, I. Margarida H. Ribeiro; Guimarães, Fernanda M. G.; Ramos, João Farinha; Recio, C.; Barriga, Fernando; Mourão, C.
Transition metals responsible for striking colour variation in tourmalines : an...
Costa, Isabel Ribeiro da; Antunes, I. Margarida H. Ribeiro; Guimarães, Fernanda M. G.; Rodrigues, P. C. R.; Barriga, Fernando; Mourão, C.
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