In this paper we present a very simple derivation of the constants of motion for dynamical systems, which requires only an elementary knowledge of the theory of continuous groups. In addition, through the infinitesimal Lorenz transformations group, we obtain a…

Algunas aplicaciones del procesamiento del lenguaje natural, p.ej. la traducción
automática, requieren una base de conocimiento provista de representaciones conceptuales que
puedan reflejar la estructura del sistema cognitivo del ser humano. En cambio, tareas como la
indización automática o la…

OBJECTIVE: This comparison of population-based representative samples of adult smokers in Canada (n=1 751) and Mexico (n=1 081) aimed to determine whether cigarette packages with graphic warning labels in Canada had a stronger impact than the text-only warning labels in…

Objective – To investigate whether African American students’ computer attitudes predict levels of library anxiety.

Design – A user study in which two instruments were administered to a group of graduate students to measure computer attitudes and library anxiety.

A survey was carried out in different localities of Rangamati and Bandarban Districts of Bangladesh between 2001 and 2002 to document medicinal plants. A total of 69 medicinal plants under 40 families were documented during this work, which the tribal…

The appearance and continuous growth of virtual communities on the web imposes the challenge of coping with the large amount of information and knowledge these communities produce. The Semantic Web with its set of standards and technologies provides the basic…

Descripción completa.

One of the most prominent areas in the two last decades of intangible assets research has been, doubtlessly, the issues related to the creation and exploitation of organizational knowledge. But organizational knowledge is a complex process
indeed, where multiple levels…

Residential aged care is largely considered a ‘green field’ with regard to Information Technology (IT). Systems that already exist usually have their own system architectures, which results in a lack of interoperability within the aged care sector as a whole.…

South Africa in recent years has continued to create significant excitement in R&D. This excitement is being supported by government, the National Research Fund (NRF), Department of Science and Technology (DST), industry and research organisations with strong collaboration and support…