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…

Indigenous knowledge and the millenary experience in management of natural vegetation on karsticlandscapes are important aspects that should be considered in animal production in seasonal tropical environments.The aim of the present work was to make an inventory of native plants…

Due to the great utility showed by the invariant latitude as an ordering parameter for trapped radiation, it is generally consider that this parameter can always substitute the three coordinates of a point in order to have its magnetic classification…

The serious, probably devastating problems with which all cultures of the world are grappling are discussed, and the question of what sorts of scientific knowledge are needed to resolve these problems is considered. The knowledge now available in the behavioral…

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…

La crisis ambiental emerge como una crisis del conocimiento, lo que problematiza la lógica de las ciencias y el estatus teórico de las ciencias sociales, desvinculadas de las condiciones ecológicas de sustentabilidad de la sociedad. Cuestionando los marcos teóricos de…

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…