Using the underlying idea of the current-mode control, a new dynamical, sliding-mode control for the boost dc-dc converter is proposed. Such controller is easy to design, robust under load and input voltage variations, exhibits fast response, does not depend on…

O objetivo desse ensaio é apresentar uma investigação entre os pressupostos das teorias da
aprendizagem (Behaviorismo, Inteligências Múltiplas e Teoria Construtivista) e sua relação de
simetria com as epistemologias da posse e da prática presentes na literatura sobre…

The ambiguity, robustness and performance of systems becomes increasingly evident as the complexity and size increase in industrial processes. Under these circumstances, conventional control techniques such as PID control, nonlinear feedback control, LQG control and H∞ control have several disadvantages…

This document describes a general structure for the implementation of virtual tools for remote calculation through Internet. Two virtual tools for mathematical analysis
(Analys) and simulation of dynamic systems (SimWeb), supported by the Matlab c, are described. These virtual tools,…

The objective of the research is to provide the Project Management Plan of the project “Medical Services Offering Extension of the Homeopathic Consultation” to Curridabat Health Area, belonging to the Integral Health Program of the University of Costa Rica. Due…

Los avances de las tecnologías de la información y comunicación (TIC)
presionan la educación y provocan transformaciones en el qué y cómo enseñar,
entre otros aspectos. Su conversión en un soporte educativo efectivo requerirá
de procesos de innovación de la…

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Planteamos varias actividades didácticas cuyo objetivo es que los alumnos y alumnas comprendan la influencia de la isostasia y del flujo térmico en el relieve del planeta y su relación con la Tectónica de Placas. Tres de ellas se basan…

This paper will undertake a critical review of a number of assumptions underpinning current thinking on understanding and supporting the internationalisation of the small and medium sized enterprise. The past twenty years has seen an explosion in academic research in…