Encontrados 6 documentos, a visualizar página 1 de 1
High-energy gamma-ray production in microquasars
Christiansen,Hugo R.; Romero,Gustavo E.; Orellana,MarianaA hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binary systems with jets, which have, presumably, hadronic components. We consider a microquasar formed by a neutron star that accretes matter from the equatorial wind of a Be primary star. The collision between the jet, emitted by the compact object, and the dense equatorial disk of the companion massive star is r...
Synthesis and characterization of highly transparent and conductive SnO2:F and ...
Riveros,R.; Romero,E.; Gordillo,G.Highly transparent and conductive thin films of SnO2:F and In2O3:Sn (ITO) have been prepared on glass substrates using the simple pyrolitic (spray) method. Through an exhaustive parameter study and using as diagnostic method for the film quality a figure of merit defined as a function of both, the transmittance and the electric resistivity, the conditions to prepare the SnO2:F and ITO films, with adequate prope...
Chirped Fibre Bragg Grating Based Multiplexer and Demultiplexer for DWDM applic...
R. Romero; O. Frazão; F. Floreani; L. Zhang; P. V. S. Marques; H. M. SalgadoA multiplexer/demultiplexer for 100 GHz channel spacing based on chirped fibre Bragg gratings with different bandwidths and optical circulators is presented. The spectral characteristics, specifications and operation of these passive devices are described, showing its potential use in dense wavelength division multiplexing (DWDM) applications.
Optical Fiber Communications: Recent Contributions in Photonic Device Technology
J. Carvalho; R. Romero; M. Melo; L. Gomes; O. Frazão; M. Marques; H. M. SalgadoThe current status of the research and development as well as the recent contributions in optical communications at INESC Porto is reviewed. This review includes all the work carried out in the last few years in optical fiber communications, namely the development of passive and active optical devices. Some of the passive structures that have been studied and developed are: add-drop multiplexers, multiplexer/de...
Estudo comparativo entre estibogluconato de sódio BP 88® e antimoniato de meglu...
Saldanha,Ana Cristina R.; Romero,Gustavo Adolfo Sierra; Guerra,Conceição; Merchan-Hamann,Edgar; Macedo,Vanize de OliveiraFoi avaliada a toxicidade de dois antimoniais pentavalentes em 111 pacientes com leishmaniose cutânea. Quarenta e sete pacientes receberam antimoniato de meglumina (Grupo I) e 64 pacientes, estibogluconato de sódio BP 88® (Grupo II), 20mg SbV/kg/dia por 20 dias. Realizou-se a avaliação de aminotransferases, fosfatase alcalina, amilase, creatinina, uréia, exame de urina e eletrocardiograma, antes do tratamento e...
Estudo comparativo entre estibogluconato de sódio BP 88R e antimoniato de meglu...
Saldanha,Ana Cristina R.; Romero,Gustavo Adolfo Sierra; Merchan-Hamann,Edgar; Magalhães,Albino Verçosa; Macedo,Vanize de OliveiraA eficácia e segurança do antimoniato de meglumina e do estibogluconato de sódio BP 88R foram comparadas no tratamento da leishmaniose cutânea em Corte de Pedra, Bahia, área endêmica de leishmaniose causada por Leishmania (Viannia) braziliensis. Realizou-se um estudo quase-experimental que incluiu 127 pacientes cujo diagnóstico baseou-se na observação clínica e a intradermorreação de Montenegro. Cinqüenta e oit...
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