630 resultados para Dipòsits digitals


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iMente es un servicio de información de prensa digital realizado en España, que da acceso a los contenidos de publicaciones en línea que incluyen medios de comunicación, notas de prensa, weblogs y boletines oficiales. Se sitúa en el contexto de los productos de información periodística; se describen sus orígenes, evolución, tecnología, contenidos y tipos de usuarios; y se analizan sus principales prestaciones documentales, como seguimientos de prensa, alertas, búsquedas y publicación de titulares.

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Se presenta una panorámica de las acciones de investigación y desarrollo en preservación digital en el ámbito internacional, incluyendo un apartado dedicado a la situación en España. La mayor atención se da en las aplicaciones de preservación digital en bibliotecas y archivos, pero también se presenta someramente la situación en otros entornos como los repositorios institucionales, los archivos administrativos, los archivos personales, la industria aeroespacial y los museos. El análisis de los protagonistas de la investigación lleva a destacar el papel preeminente de algunas bibliotecas y archivos nacionales, de determinados países y una incipiente entrada de empresas de software. En cuanto a las líneas de investigación destaca la integración de herramientas para generar sistemas de preservación integrados.

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Con la generalización del movimiento Open Access (acceso abierto) se han desarrollado políticas de apoyo a la publicaciónen abierto de revistas científicas, y complementariamente acciones de creación de repositorios digitales. El objetivo, eneste último caso, es posibilitar que los autores depositen sus contenidos (artículos, ponencias, tesis, etc.) para que seanaccesibles en línea por parte de toda la comunidad profesional y científica. En el caso de la bibliotecología y las ciencias afines (documentación, archivística, comunicación...) el repositorio ELIS(http://eprints.rclis.org) es un magnífico ejemplo de herramienta útil realizada por y para el colectivo bibliotecario que cree en el acceso abierto.

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Rapid growth in the availability and use of digital documents has prompted the development of instruments to handle them. A most important example of these instruments are digital identifiers, which provide a codification system that allows digital items, usually up to the level of a computer file, to be singled out and located. Digital identifiers make up standardized global systems applied to specific products or areas. They are part of the very many identifiers developed to handle large numbers of items and large amounts of information for transactional purposes, which often have a global span. Digital identifiers include the ubiquitous Global Trade Item Number (GTIN), a code that unequivocally identifies trade items all around the world. The GTIN can take on several configurations depending on its application. These include: EAN-13, EAN-8, EAN-14, and UCC-12. EAN-13 is the code used for retail products in order to facilitate trade at the point of sale; its widely known symbol or graphical form is the EAN/UPC-13 bar code...

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Introduction. The DRIVER I project drew up a detailed report of European repositories based on data gathered in a survey in which Spain's participation was very low. This created a highly distorted image of the implementation of repositories in Spain. This study aims to analyse the current state of Spanish open-access institutional repositories and to describe their characteristics. Method. The data were gathered through a Web survey. The questionnaire was based on that used by DRIVER I: coverage; technical infrastructure and technical issues; institutional policies; services created; and stimulators and inhibitors for establishing, filling and maintaining their digital institutional repositories. Analysis. Data were tabulated and analysed systematically according responses obtained from the questionnaire and grouped by coverage. Results. Responses were obtained from 38 of the 104 institutions contacted, which had 29 institutional repositories. This represents 78.3% of the Spanish repositories according to the BuscaRepositorios directory. Spanish repositories contained mainly full-text materials (journal articles and doctoral theses) together with metadata. The software most used was DSpace, followed by EPrints. The metadata standard most used was Dublin Core. Spanish repositories offered more usage statistics and fewer author-oriented services than the European average. The priorities for the future development of the repositories are the need for clear policies on access to scientific production based on public funding and the need for quality control indicators. Conclusions.This is the first detailed study of Spanish institutional repositories. The key stimulants for establishing, filling and maintaining were, in order of importance, the increase of visibility and citation, the interest of decision-makers, simplicity of use and search services. On the other hand the main inhibitors identified were the absence of policies, the lack of integration with other national and international systems and the lack of awareness efforts among academia.

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A compilation of digital resources for information and play activities for hospitalized children and their families. For each resource, we present an outline of the organization that promotes it and its objectives.

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A compilation of digital resources for information and play activities for hospitalized children and their families. For each resource, we present an outline of the organization that promotes it and its objectives.

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Although some projects and most LMS still rely on IEEE LOM, this standard is not yet an option. We suggest some lessons to learn.

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The presence of cavities filled with new minerals in carbonate rocks is a common feature in oil reservoirs and lead-zinc deposits. Since groundwater equilibrates rapidly with carbonates, the presence of dissolution cavities in deep carbonate host rocks is a paradox. Two alternative geochemical processes have been proposed to dissolve carbonates at depth: hydrogen sulfide oxidation to sulfuric acid, and metal sulfide precipitation. With the aid of geochemical modeling we show that mixing two warm solutions saturated with carbonate results in a new solution that dissolves limestone. Variations in the proportion of the end-member fluids can also form a supersaturated mixture and fill the cavity with a new generation of carbonate. Mixing is in general more effective in dissolving carbonates than the aforementioned processes. Moreover, mixing is consistent with the wide set of textures and mineral proportions observed in cavity infillings.

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Water tanks offer from many centuries ago solutions in South India for several problems related with water scarcity. They are a traditional water harvesting system wide spread in this territory, allowing a potential decentralized and participatory management of the local population on their own resources. Although water tanks¿ main function is irrigation, they have many other uses, functions and natural resources associated, involving stakeholders in the villages apart from those farmers making use of the irrigation. Water tanks provide a variety of landscapes and biodiversity that creates a valuable heterogeneous territory. The complexity of such an ecosystem should be managed with an integral perspective, considering all the elements involved and their relations, and understanding that water tanks are not just water deposits. This multidisciplinary study tries to demonstrate the idea of water tanks as ecosystems, describing and analyzing deeply and in an unprecedentedly way the functions, uses, natural resources and stakeholders. The research also focuses in the assessment of the ecosystemic perception of the local population of some villages in Tamil Nadu, employing diverse anthropological methodology.

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Selección personal de 100 proyectos de digitalización internacionales y locales actualmente en funcionamiento. La elección se ha hecho siguiendo el interés que pueden tener las obras incluidas y en otras ocasiones por los servicios, las herramientas y las aplicaciones diferentes que se proponen. La mayor parte de los recursos tienen como objetivo ofrecer una copia digital de libros pero también se incluyen otras tipologías documentales: publicaciones periódicas, tesis, literatura gris, fotografías, grabados, grabaciones sonoras... Abundan los proyectos realizados por las bibliotecas nacionales y universitarias, los proyectos comerciales más representativos y las colecciones colaborativas. Una tipología a destacar es la de las plataformas que pretenden recuperar y difundir una cultura o una lengua. La lista incluye preferentemente proyectos de bibliotecas digitales con obras de dominio público, las obras de las que se pueden descargar e imprimir, también están incluidos pero materiales de pago. La ordenación de la selección está presentada alfabéticamente.

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Comunicació presentada a: II Setmana Internacional de l'Accés Obert a la Universitat de Barcelona. Universitat de Barcelona, del 18 al 22 d'octubre de 2010

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Comunicació presentada a: II Setmana Internacional de l'Accés Obert a la Universitat de Barcelona. Universitat de Barcelona, el 19 d'octubre de 2010

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Descripció de les polítiques, materials, usuaris, selecció i introducció de documents, documents associats i difusió del Dipòsit Digital de la UB