On the determination of diffusion coefficients in two-component alloys and doped semiconductors: several implications concerning the International Space Station

The accurate determination of mass diffusion coefficients is a technologically relevant problem that has implications on the modelling and control of material processes such as crystal growth and casting. It is also important in the validation of different theories of atomic diffusion. The experimental determination of these coefficients, when there is a liquid phase, is difficult due to the unavoidable presence of buoyancy driven convection currents that enhance mass transport and disturb diffusion measurements. To minimize as much as possible these problems, long capillaries are used in order to confine the fluid and reduce the intensity of the convective motions. These measurements have also been done in reduced gravity environments, but the residual gravity may still be able to induce buoyancy driven convection motions. The aim of our work is to analyze the impact of low solutal Rayleigh number environments on the accuracy of the interdiffusion coefficient measurements using long capillaries. In the present study we deal with two liquid systems; photovoltaic silicon and Al-based liquid binary alloys at high temperature. We have numerically simulated two different experimental techniques used to determine the diffusion coefficients; the shear cell and the long capillary techniques. We also consider the effect of rotating the cylindrical cell along their axis as a mechanism to reduce axial convective transport even in Earth laboratories. Finally, we use typical accelerometric signals from the International Space Station (ISS) in the quasi-steady range of frequencies. The signals concentrate on typical station reboosts because the accelerometric level of the rest of potentially dangerous disturbances - dockings, undockings and Extra Vehicular Activities, EVAs - is considerably lower.Peer ReviewedPostprint (author's final draft

Backstage pass

A “Backstage Pass”, l’exposició de fi de curs creada pels alumnes d’aquest any, tenim el privilegi d’entrar en els processos creatius d’aquests 25 joves il·lustradors emergents. Ells comparteixen els seus treballs i inquietuds amb gran varietat d’estils visuals i conceptuals, tot just, al principi de les seves carreres. Estic segur que molts d’aquests nous talents seran els il·lustradors destacats del dia de demà. Gaudim doncs d’aquesta mirada íntima i generosa.En “Backstage Pass”, la exposición de fin de curso, creada por los alumnos de este año, tenemos el privilegio de entrar en los procesos creativos de estos 25 jóvenes ilustradores emergentes. Comparten su trabajo e inquietudes, con gran variedad de estilos visuales y conceptuales, justo ahora, al principio de sus carreras. Estoy seguro que muchos de estos nuevos talentos serán los ilustradores destacados del mañana. Disfrutemos de esta mirada íntima y generosa.In “Backstage Pass” the end of course exhibition created by this year’s alumni, we have the privilege of entering into the creative processes of these 25 young, emerging illustrators. They share their work & talents through a wide variety of visual and conceptual styles, in this moment, at the beginning of their careers. I'm sure many of these new talents will be tomorrow’s outstanding illustrators. Let's enjoy this intimate and generous look into their current work

Immunological and pathological status of gilthead sea bream (Sparus aurata L.) under different long-term feeding regimes

The possible influence of the feeding regime (FR) on the immune system and pathological status of gilthead sea bream was studied. Two growth trials were performed starting at different seasons (trial 1 = March; trial 2 = June) under controlled experimental conditions. In both trials, FR-1 groups received a restricted amount of food, whereas FR-2 groups were fed to visual satiety. The pathology study included parasitological and bacteriological examination, and the immunological traits analysed were respiratory burst activity of head kidney leucocytes, serum lysozyme and alternative pathway complement activity (ACH50). The immunological status of gilthead sea bream not only was not impaired by the restricted feeding regime, but also seemed to be enhanced in some aspects, as the respiratory burst of FR-1 fish of trial 2 was significantly higher. No differences in the bacterial isolates were detected between the two feeding regimes, and Vibrio harveyi was the most prevalent species in both cases, especially in warm months. Also, fish under FR-1 regimes had significantly lower mortality, lower prevalence of infection of all the parasites except Cryptosporidium molnari, and less histopathological alterations in liver and intestine than those under FR-2 regimes. © 2003 Elsevier Science B.V. All rights reserved.This work was supported by research grants from the Spanish Ministerio de Educación, Cultura y Deporte under FEDER Program no. 1FD97-979-C02. M. Mingarro was recipient of a fellowship from the Diputación de Castellón. We are thankful to M.L. Alonso, M.A. González and G. Sanza for technical assistance in the samplings, and to J. Montfort for the histological processing

On the determination of diffusion coefficients in two-component alloys and doped semiconductors: several implications concerning the International Space Station

The accurate determination of mass diffusion coefficients is a technologically relevant problem that has implications on the modelling and control of material processes such as crystal growth and casting. It is also important in the validation of different theories of atomic diffusion. The experimental determination of these coefficients, when there is a liquid phase, is difficult due to the unavoidable presence of buoyancy driven convection currents that enhance mass transport and disturb diffusion measurements. To minimize as much as possible these problems, long capillaries are used in order to confine the fluid and reduce the intensity of the convective motions. These measurements have also been done in reduced gravity environments, but the residual gravity may still be able to induce buoyancy driven convection motions. The aim of our work is to analyze the impact of low solutal Rayleigh number environments on the accuracy of the interdiffusion coefficient measurements using long capillaries. In the present study we deal with two liquid systems; photovoltaic silicon and Al-based liquid binary alloys at high temperature. We have numerically simulated two different experimental techniques used to determine the diffusion coefficients; the shear cell and the long capillary techniques. We also consider the effect of rotating the cylindrical cell along their axis as a mechanism to reduce axial convective transport even in Earth laboratories. Finally, we use typical accelerometric signals from the International Space Station (ISS) in the quasi-steady range of frequencies. The signals concentrate on typical station reboosts because the accelerometric level of the rest of potentially dangerous disturbances - dockings, undockings and Extra Vehicular Activities, EVAs - is considerably lower.Peer Reviewe

Las transversales a través de los medios de comunicación

Experiencia que consiste en la elaboración de material audiovisual para el tratamiento de los temas transversales de Educación para el Consumidor, Educación para la Paz y Educación para la Igualdad. Este material se ha extraído de los diferentes medios de comunicación, y ha sido preparado por los profesores y alumnos, que lo han adaptado a las áreas de Plástica, Música, Ciencias Sociales y EATPs. Las actividades consisten en: encuestas sobre la influencia y el tiempo de ocio dedicado a los medios de comunicación, selección de material audiovisual, confección de diapositivas y transparencias, y edición de vídeos. La evaluación se ha realizado a partir de reuniones y puestas en común, y se ha valorado el funcionamiento del equipo del proyecto, y los materiales elaborados..Madrid (Comunidad Autónoma). Consejería de Educación y CulturaMadridMadrid (Comunidad Autónoma). Subdirección General de Formación del Profesorado. CRIF Las Acacias; General Ricardos 179 - 28025 Madrid; Tel. + 34915250893ES

La Historia en la literatura española del siglo XIX

Editors literaris: José Manuel González Herrán, Marisa Sotelo Vázquez, Cristina Carbonell, Hazel Gold, Dolores Thion Soriano-Mollá, Blanca Ripoll Sintes i Jessica Cáliz MontesEste volumen recoge los frutos del VII Coloquio de la Sociedad de Literatura Española del Siglo XIX, celebrado en Barcelona entre el 22 y el 24 de octubre de 2014. El encuentro contó con una nutrida participación de especialistas procedentes de universidades españolas y de otros países europeos, norteamericanas y japonesas. Las cuarenta y siete ponencias se agrupan en seis secciones que abordan los diferentes aspectos de las relaciones entre la literatura y la historia desde el Romanticismo hasta el fin de siglo, así como la interacción de la historia con los distintos géneros literarios, especialmente la novela y el teatro, sin olvidar otras vertientes culturales como la prensa. Asimismo, se dedican sendas secciones monográficas a Benito Pérez Galdós y Emilia Pardo Bazán