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Efectos de la inserción de elementos de parámetros concentrados sobre los modos...
Gómez,B.J.; Repetto,C.E.; Stia,C.R.; Welti,R.En este trabajo se estudia la influencia de parámetros concentrados sobre los modos normales de oscilación de un medio continuo de dimensiones finitas. En particular, se estudian las vibraciones de una antena dipolo corta con una inductancia concentrada y los modos acústicos en un tubo con una cámara de expansión en su punto medio. Se encuentra que estos problemas presentan una gran similitud con los modos tran...
Oxygen ion implantation in Strontium Bismuth Tantalate thin films
Rico,L.; Gómez,B. J.; Stachiotti,M.; Pellegri,N.; Feugeas,J. N.; Sanctis,O. deStrontium Bismuth Tantalate (SBT) ferroelectric thin films have attracted considerable attention for the development of non-volatile ferroelectric random access memories (NV-FRAMs). These films, however, have a critical problem: a high processing temperature ( > 700ºC) is required for the crystallization of the perovskite phase. The thermal evolution of the SBT films prepared by Chemical Solution Deposition (CS...
Influence of ion nitriding process on the properties of zirconia coating deposi...
Gómez,B. J.; Caruso,R.; Nachez,L.; Díaz-Parralejo,A.; Feugeas,J.; Sanctis,O. deZrO2-3 mol % Y2O3-coated AISI 310 stainless steel was nitrided using plasma produced by dc pulsed discharge in a mixture of N2 and H2 at an equilibrium temperature of 450ºC. Profile chemical analyses with GDOS (glow discharge optical spectroscopy) and XRD showed the formation of Nitrogen/Y-ZrO2 solid solution. Nitrogen atoms enter in the zirconia substituting to the oxygen atoms in the network. Although, the ni...
Os contornos da cidadania crítica: explorando a legitimidade democrática
Seligson,Mitchel A.; Booth,John A.; Gómez B.,MiguelRecentes quedas acentuadas da confiança no governo dos públicos de massa de democracias institucionalizadas reacenderam o interesse pela teoria e pesquisa sobre a legitimidade. Há muito tempo os teóricos concebem a legitimidade política como multidimensional e sustentam que ela vai do apoio abstrato a uma comunidade política subjacente aos princípios do regime à avaliação mais concreta do desempenho do regime, ...
Calcium phosphate granules in the reproductive system of Oxychilus atlanticus (...
Gomez, B. J.; Rodrigues, ArmindoCopyright © The Malacological Society of London 2000. ; The presence of connective interstitial cells in the wall of several organs of the distal reproductive system in Oxychilus atlanticus is described by means of scanning electron microscopy (SEM). Connective interstitial cells extend from the distal part of the vas deferens to the penis, being the dominant cell type of large portions of the epiphallus as we...
Aplastic anemia. Alternative treatment by bone marrow transplantation.
Fonseca, T; Serviço Medicina I, Hospital de Santa maria, Lisboa.; Raposo, J; Gomez, B; d'Oliveira, J J; de Lacerda, J MWe report a case of a 25-year-old woman, with the diagnosis of severe aplastic anemia without a histocompatible sibling donor for bone marrow transplantation. The patient has been treated successfully with a combination of two immunosuppressive agents, cyclosporine and antilymphocyte globulin, after not responding to primary therapy with corticosteroids and growth factors. She showed a complete response to trea...
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