Estructura de un Sistema Gestor de Base de Datos

Un administrador de bases de datos (o DBA) tiene la responsabilidad de mantener y operar las bases de datos que conforman el sistema de información de una compañía.

Toda la información que se maneja dentro de un computador se encuentra almacenada en su memoria, que en trminos simples es una secuencia de caracteres (bytes) en donde se encuentran las instrucciones y datos a los que se accede directamente a travs del procesador del computador.

The emergence of digital libraries and access to information has led to the emergence of models of the questions that are raised about the feasibility of such systems in developing countries in the context of the shift towards globalization of information services. The debate has focused on whether the emergence of digital libraries will benefit developing countries or in fact deepening social inequality. Questions about whether digital libraries will improve teaching and research results at universities in developing countries was also raised, and therefore helps to reduce the existing information gap between developed and developing countries. This study aims to measure the extent of education and scientific research in the Jordanian academic institutions, which are being strengthened and supported through the implementation of digital library services and their potential to provide such services output. This study used a number of faculties of Jordanian universities, a faculty of medicine at the University of Jordan, Pharmacy - Hashemite University, Engineering at the University of Science and Technology of Jordan, Management and Economics at Yarmouk University, Human Sciences in Al-Balqa Applied University. This study is based on the 6 survey method field, which is the best way to measure performance in this type of study, used the method of resolution as a key tool for research and data collection, and was distributing 400 copies of the questionnaire to a sample study of the professors, and graduate students, and students in grades ending of undergraduate, as well as staff. It was adopted and analysis (396) questionnaire, and neglected the remaining four for lack of integration of their data. The results showed that weakness of media outlets in the definition of the users of the importance of digital libraries, which was reflected on the lack of experience of the users to take advantage of them and invest her properly. The study recommended to achieve the expected success of the project Digital Library, and the highest amount of interest to the researchers, must provide full and free texts for research and other digital sources, it is still a high proportion of those sources in the rules of international information that was to link to request financial amounts.