Manual para la evaluación de proyectos de vías nacionales y regionales mediante el uso del programa HDM: the Highway Design and Maintenance Standard Model

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A single-phase single-stage buck-boost inverter intended for low power alternative energy conversion systems: Analysis, design and experimentation

This paper presents the operational analysis of the single-phase integrated buck-boost inverter. This topology is able to convert the DC input voltage into AC voltage with a high static gain, low harmonic content and acceptable efficiency, all in one single-stage. Main functionality aspects are explained, design procedure, system modeling and control, and also component requirements are detailed. Main simulation results are included, and two prototypes were implemented and experimentally tested, where its results are compared with those corresponding to similar topologies available in literature. © 2012 IEEE.

Design and evaluation of an advanced virtual reality system for visualization of dentistry structures

This paper presents the development of an application created to assist the teaching of dental structures, generate rich content information and different manners of interaction. An ontology was created to provide semantics informations for virtual models. We also used two devices gesture-based interaction: Kinect and Wii Remote. It was developed a system which use intuitive interaction, and it is able to generate three dimensional images, making the experience of teaching / learning motivating. The projection environment used by the system was called Mini CAVE. © 2012 IEEE.

Indicators of fiscal policy: design and applications for Chile

Includes bibliography

Science and technology policy and the National Innovation System in Argentina

Includes bibliography

Internationalization and technology in MERCOSUR

Includes bibliography

Reservoir design and operation: Effects on aquatic biota-a case study of planktonic copepods

Copepod assemblages from two cascade reservoirs were analyzed during two consecutive years. The upstream reservoir (Chavantes) is a storage system with a high water retention time (WRT of 400 days), and the downstream one (Salto Grande) is a run-of-river system with only 1. 5 days WRT. Copepod composition, richness, abundance, and diversity were correlated with the limnological variables and the hydrological and morphometric features. Standard methods were employed for zooplankton sampling and analysis (vertical 50-μm net hauls and counting under a stereomicroscope). Two hypotheses were postulated and confirmed through the data obtained: (1) compartmentalization is more pronounced in the storage reservoir and determines the differences in the copepod assemblage structure; and (2) the assemblages are more homogeneous in the run-of-river reservoir, where the abundance decreases because of the predominance of washout effects. For both reservoirs, the upstream zone is more distinctive. In addition, in the smaller reservoir the influence of the input from tributaries is stronger (turbid waters). Richness did not differ significantly among seasons, but abundance was higher in the run-of-river reservoir during summer. © 2012 Springer Science+Business Media Dordrecht.

Informe del Noveno Período de Sesiones del Comité de Expertos Gubernamentales de Alto Nivel, dedicado a la ciencia y la tecnología para el desarrollo = Report of the Ninth Session of the Committee of High-Level Government Experts: science and technology for development

Presenta la organizacion de los trabajos y el resumen de los debates de la reunion del CEGAN, realizada en Montevideo entre el 23 y el 24 de enero de 1984 en la cual se trataron la evaluacion de la aplicacion del Programa de Accion de Viena sobre ciencia y tecnologia para el desarrollo en America Latina, las propuestas de medidas y acciones futuras y las recomendaciones a los organos internacionales y regionales.

Nota de la Secretaría sobre el Plan de Acción Mundial para la Aplicación de la Ciencia y la Tecnología al Desarrollo durante el Segundo Decenio para el Desarrollo = World Plan Action for the Application of Science and Technology to Development during Second Development Decade: note by the Secretariat

Incluye Bibliografía