A brief review is first given of the available studies (upto 1984) related to the Mexican Volcanic Belt (MVB). A synthesis is then presented of the most important results of the papers included in the Special Volume on the MVB…

In this study we analyze the meaning of symbols based on the psychological approach of Piaget. In addition, we would like to stimulate more research in this area. A symbol has sense when it has a nexus with a specific…

Se destaca la importancia que tuvo la obra de Skinner en la aplicación del conocimiento psicológico a una diversidad de problemas como los de Ia educación, la salud y otros más, It is emphazised the importance of Skinner's works in…

The traditional concept of intelligence and its measurement are critically reviewed, stressing its logical and empirical deficiencies. An alternative definition of intelligence as varied and effective behavior is proposed and it is analyzed in terms of competences. Taking into account…

The present paper argues for the systematization of the established knowledge on eating behavior in Conditioning and in Motivation on the basis of the quantitative contiguities between some of its controlling variables. A variable in common to both types of…

El análisis paleoepidemiológico y paleodemográfico en las poblaciones mayas ha sido un tema que se ha tratado en forma separada por diversos investigadores, llegando a interpretaciones sesgadas por la escasa conjunción de estas áreas complementarias que abordan los estudios antropofísicos. Más aún, la…

Health studies in ancient populations is a very complex field. Many years passed by before anthropologists showed concern to know about health in ancient populations, and paleopathological studies of skeletal remains shifted from the traditional clinic orientation of individual cases to population and…

Desarrollamos una aplicación de la tecnología computacional en la evaluación del conocimiento de los estudiantes. Implementamos una tecnología cliente-servidor, de código original en Java, basada en el proceso natural de evaluación donde los estudiantes (clientes) universitarios son evaluados por un…

Globalization is analyzed as a scientific category, and also as ideological discourse. The first perspective is based on the recognition of the fact that the present state of capitalism has not essentially changed vis-à-vis the past as regards the asymmetrical…

Dopamine is a neurotransmitter strongly involved in the feeding behavior regulation. It has been reported that different dopamine receptor agonists inhibited voluntary food intake, nevertheless, dopamine depletion induced intense hypophagia. Current knowledge of D2 receptors and D3 mRNA expression in…