Different coupled general circulation models are used to: (1) gain a better understanding of natural climate variability on interannual and decadal time scales; (2) use as a tool to extend weather forecasts; and (3) make seasonal climate projections under different…

Los incendios cañeros constituyen una de las causas de pérdidas importantes en el CAI Jesús Rabí. Con una base de datos de los archivos del Cuerpo de Bomberos de Matanzas, que abarca desde 1989 hasta 2000 y la información de…

Este trabajo estudia los primeros estados de la corrosión de un acero al carbono en una disolución que simula la existente en los poros del hormigón, sin carbonatar, con un 5% de NaCl. Para ello, se ha empleado la técnica…

This paper outlines the development of a power quality monitoring system. The system is aimed at assessing power quality and detecting critical areas throughout at distribution system. Such system integrates a hardware system and a software processing tool developed in…

The data of three experiments on observational learning are reported. Experiment 1 assessed the effects of modeling different contingencies between pecking a peg and food reinforcement, on acquisition of the same response in observer pigeons. Results show that the group…

This paper presents several concepts and techniques for quantifying electric signal entropy and variability for assessing power quality, showing their irregularities, such as the electrical sine wave which delivers power to industry and homes. The paper will review these concepts…

Electrostatic field measurements taken in Bogotá, Colombia, during thunderstorms in November (the rainy season due to inter-tropical confluence zone over central Colombia) were used to study the performance of an isolated electric field sensor and analyse its most important operational…

Three experiments assessed the generality of the matching law in situations that differed in the number of avaliable alternatives. in different conditions reinforcement rate varied across levers according to concurren schedules with random-interval components. Barriers (70cm high) separated two, four,…

Many independent variables related te developrnent are better approached with group than single-subject methods, either because experimental manipulation would be unethical or because they are only indexes of the real causal variables. Both kinds of variables can be studied in…

Debido a la creciente utilización de dispositivos basados en electrónica de potencia y de otras cargas de características no lineales, es que la distorsión armónica en las señales de tensión y de corriente es un problema que va en aumento…