Resoluciones aprobadas por el Comité de Desarrollo y Cooperación del Caribe en su Noveno Período de Sesiones = Resolutions approved by the Caribbean Development and Co-operation Committee at its Ninth Session = Résolutions adoptées a la Neuvième Session du Comité de Développement et de Coopération des Caraïbes

Contiene las resoluciones: 18(IX) Programa de apoyo a los pequenos paises insulares en desarrollo; 19(IX) Creacion del Comite Examinador del CDCC; 20(IX) Accion futura del CDCC.

Mujer y cooperativismo en América Latina = Women and co-operativism in Latin America

Incluye Bibliografía

Informe del Taller de Trabajo sobre Cooperación Técnica y Económica para el Sector Minero-Metalúrgico de América Latina = Report of the Workshop on Technical and Economic Co-operation for the Latin American Mining and Metallurgical Sector

Contiene la asistencia, organizacion de los trabajos y resumen de los debates sobre los temas: 1) posibilidades de incrementar el comercio internacional de minerales y metales de America Latina; 2) politicas de desarrollo del sector minero; y 3) posibilidades de complementacion regional e interregional en la industria minero- metalurgica y metalmecanica.

Informe de la Reunión de Expertos Regionales en Preparación de la Conferencia de las Naciones Unidas para el Fomento de la Cooperación Internacional en la Utilización de la Energía Nuclear con Fines Pacíficos = Report of the Regional Expert Group Meeting for the United Nations Conference for the Promotion of International Co-operation in the Peaceful Uses of Nuclear Energy

Contiene la organizacion y debates de la reunion que tuvo como objetivo analizar la situacion actual, evolucion proyectada, restricciones actuales y previsibles a la introduccion y expansion de la utilizacion de la energia nuclear con fines pacificos a la luz de las necesidades y prioridades de la region.

Visible to infrared energy conversion in Pr3+-Yb3+ co-doped fluoroindate glasses

Processes involving visible to infrared energy conversion are presented for Pr3+-Yb3+ co-doped fluoroindate glasses. The emission in the visible and infrared regions, the luminescence decay time of the Pr 3+:3P0 → 3H4 (482 nm), Pr3+:1D2 → 3H6 (800 nm), Yb3+:2F5/2 → 2F 7/2 (1044 nm) transitions and the photoluminescence excitation spectra were measured in Pr3+ samples and in Pr3+-Yb 3+ samples as a function of the Yb3+ concentration. In addition, energy transfer efficiencies were estimated from Pr3+: 3P0 and Pr3+:1D2 levels to Yb3+:2F7/2 level. Down-Conversion (DC) emission is observed due to a combination of two different processes: 1-a one-step cross relaxation (Pr3+:3P0 → 1G4; Yb3+:2F7/2 → 2F5/2) resulting in one photon emitted by Pr3+ (1G4 → 3H5) and one photon emitted by Yb3+ (2F7/2 → 2F5/2); 2-a resonant two-step first order energy transfer, where the first part of energy is transferred to Yb3+ neighbor through cross relaxation (Pr3+:3P0 → 1G4; Yb3+:2F7/2 → 2F5/2) followed by a second energy transfer step (Pr 3+:1G4 → 3H4; Yb3+:2F7/2 → 2F5/2). A third process leading to one IR photon emission to each visible photon absorbed involves cross relaxation energy transfer (Pr3+: 1D2 → 3F4; Yb 3+:2F7/2 → 2F5/2). © 2013 Elsevier B.V. All rights reserved.