Although our biological knowledge regarding cactus species is thorough in many areas, only in recent years have ecologists addressed their demographic behavior. Here we attempt a first review of the present knowledge on cactus demography, including an analysis of the…

(3) the richness pattern is independent of the endemism pattern because the richest areas are the tropical humid lowlands, and (5) Mexico presents several insular intracontinental patterns, which are the product of the disjunct and heterogeneus distribution of xeric and…

Environmentalism and social sciences appear to be in a period of disorientation and perhaps transition. In this innovative collection, leading international thinkers explore the notion that one explanation for the current malaise of the “politics of ecology” is that we…

Se plantea la utilidad que representa para el alumno el aprendizaje significativo de la lengua escrita para acceder a la información como base para la construcción del conocimiento. Así, la atención pedagógica se centra en aspectos que debe poner en…

Abstract. The great contemporary organizational challenge for enterprises is to create a conceptual and methodological framework allows the management of knowledge by means of networks designed for social interaction. This statement is based on the premise that the competitive drive…

The purpose of this study was to assess the pedagogical equivalence, as determined by knowledge gains, and the pedagogical effectiveness of certain components in a video-driven multimedia, web-based professional development training program as compared to a traditional, face-to-face program under…

This study had three purposes: Firstly, to develop a categorization of research areas in distance education; secondly, to identify the most important research areas in distance education; and thirdly, to identify the most neglected research areas in distance education. Based…

Adult learners value the flexibility and convenience offered to them as online learners, and many learners are required to absent themselves from their online classes during courses in order to accommodate demanding schedules. What factors and tensions contribute to learners’…

Las dificultades para evaluar el conocimiento estratégico han estado relacionadas principalmente con el uso de pruebas descontextualizadas, que no requieren ponerlo en juego; por esto el interés por comprobar que las tareas auténticas de escritura ofrecen ventajas para ello. En…

This paper presents a study of uncertainty dimensions of information behaviour in a group based problem solving context. After a presentation of the cognitive uncertainty dimension underlying Kuhlthau’s ISP-model, uncertainty factors associated with personality, the work task situation and social…