This paper proposes a theoretical framework for the conceptualization and design of help options in computer-based second language (L2) listening. Based on four empirical studies, it aims at clarifying both conceptualization ...

In this paper we solve the Dial-A-Ride Problem (DARP). The main objective of the DARP is to minimize operation costs for renting pieces of work from the transportation service providers. The resolution approach considered ...

Commercial fisheries are expanding their activities into deeper water. The life history features of these deep-water resources make them more vulnerable to exploitation than most shallow-water resources. Moreover, the ...

Evolution of montane species may be strongly influenced by climate oscillations, particularly species distributed in isolated high-elevation areas (sky islands). Chilean topography is exemplified by montane environments ...

The main lessons achieved through three years of paleosismological research in central-South Chile are offered. Thank to these clues, a team composed by Chilean, north American and Japanese researchers, within the framework ...

La Libre Competencia como elemento esencial en una economía de mercado, representa un medio para la organización de la actividad económica, que desde la perspectiva de las libertades, se traduce en un pilar fundamental de ...

This paper presents a model of interaction of radiation on breast, based on Bosso's filter. This model is used to improve mammographic images for early cancer diagnosis, to be more accurate and to detect cluster of ...

In this work we model the population dynamics of Genypterus blacodes of the demersal fishery on Chilean southern-austral region, using stage structured matrices, from a 17-year time-series of annual age-specific female ...