962 resultados para SEMICONDUCTOR CDS
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Proporciona las instrucciones necesarias para utilizar el Sistema de Información Bibliográfica de CEPAL en una computadora personal IBM o similar, dotada del sistema operativo PC-DOS o MS-DOS y del sistema Micro CDS/ISIS. Comprende 1) la instalación del sistema en la computadora, 2) demostración de sus capacidades, 3) descripción de los diferentes elementos que lo componen, 4) instrucciones para llevar a cabo las diferentes tareas bibliográficas, 5) instrucciones para la creación de una base de datos.
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Incluye Bibliografía
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Presenta la coordinación o unión de las expresiones de búsqueda.
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Tiene por objetivo facilitar al personal de las unidades de información de la Red IPALCA la realización de funciones utilizando el Mini-Micro CDS/ISIS.
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Contiene el procedimiento de instalación del Microisis modificado y del Sistema de Información Bibliográfica de CEPAL para la Red IPALCA.
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Incluye Bibliografía
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Explica literales y comandos para espaciador horizontal y vertical y otros de los formatos de despliegue del mini-micro CDS/ISIS.
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Contiene ayuda memoria para la exportación de una base, creación de archivo PAR, creación de subdirectorio y copia de archivos para lo cual se requiere tener instalado el Mini Micro ISIS versión 1.0 y 2.3 Red IPALCA.
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Presenta los símbolos que se utilizan en la búsqueda de información en una base de datos, tanto las realizadas en el archivo invertido, como en búsquedas libres en el texto, con la indicación de la operación que cumplen y un ejemplo de uso.
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Incluye Bibliografía
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Germanium- and tellurium-based glasses have been largely studied due to their recognized potential for photonics. In this paper, we review our recent studies that include the investigation of the Stokes and anti-Stokes photoluminescence (PL) in different glass systems containing metallic and semiconductor nanoparticles (NPs). In the case of the samples with metallic NPs, the enhanced PL was attributed to the increased local field on the rare-earth ions located in the proximity of the NPs and/or the energy transfer from the metallic NPs to the rare-earth ions. For the glasses containing silicon NPs, the PL enhancement was mainly due to the energy transfer from the NPs to the Er3+ ions. The nonlinear (NL) optical properties of PbO-GeO 2 films containing gold NPs were also investigated. The experiments in the pico- and subpicosecond regimes revealed enhanced values of the NL refractive indices and large NL absorption coefficients in comparison with the films without gold NPs. The reported experiments demonstrate that germanate and tellurite glasses, having appropriate rare-earth ions doping and NPs concentration, are strong candidates for PL-based devices, all-optical switches, and optical limiting. © 2013 Cid Bartolomeu de Araujo et al.
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An Advanced Oxidation Process (AOPs) was carried out in this study with the use of immobilized ZnO and solar/UV as an energy source to degrade dairy wastewater. The semibatch reactor system consisted of metal plate of 800 × 250 mm and a glass tank. The reaction time was of 3 h for 3 L of dairy wastewater. Experiments were performed based on a surface response methodology in order to optimize the photocatalytic process. Degradation was measured in percentage terms by total organic carbon (TOC). The entry variables were ZnO coating thickness and pH, using three levels of each variable. The optimized results showed a TOC degradation of 31.7%. Optimal parameters were metal-plate coating of 100 m of ZnO and pH of 8.0. Since solar/UV is a constant and free energy source in most tropical countries, this process tends to suggest an interesting contribution in dairy wastewater treatment, especially as a pretreatment and the optimal conditions to guarantee a better efficiency of the process. © 2013 Gisella R. Lamas Samanamud et al.
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Incluye Bibliografía