Search (23 results, page 1 of 2)

  • × theme_ss:"Verteilte bibliographische Datenbanken"
  1. Sarinder, K.K.S.; Lim, L.H.S.; Merican, A.F.; Dimyati, K.: Biodiversity information retrieval across networked data sets (2010) 0.02 
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    Abstract
    Purpose - Biodiversity resources are inevitably digital and stored in a wide variety of formats by researchers or stakeholders. In Malaysia, although digitizing biodiversity data has long been stressed, the interoperability of the biodiversity data is still an issue that requires attention. This is because, when data are shared, the question of copyright occurs, creating a setback among researchers wanting to promote or share data through online presentations. To solve this, the aim is to present an approach to integrate data through wrapping of datasets stored in relational databases located on networked platforms. Design/methodology/approach - The approach uses tools such as XML, PHP, ASP and HTML to integrate distributed databases in heterogeneous formats. Five current database integration systems were reviewed and all of them have common attributes such as query-oriented, using a mediator-based approach and integrating a structured data model. These common attributes were also adopted in the proposed solution. Distributed Generic Information Retrieval (DiGIR) was used as a model in designing the proposed solution. Findings - A new database integration system was developed, which is user-friendly and simple with common attributes found in current integration systems.
    Footnote
    Beitrag in einem Special Issue: Content architecture: exploiting and managing diverse resources: proceedings of the first national conference of the United Kingdom chapter of the International Society for Knowedge Organization (ISKO)
  2. Crestani, F.; Wu, S.: Testing the cluster hypothesis in distributed information retrieval (2006) 0.01 
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    Abstract
    How to merge and organise query results retrieved from different resources is one of the key issues in distributed information retrieval. Some previous research and experiments suggest that cluster-based document browsing is more effective than a single merged list. Cluster-based retrieval results presentation is based on the cluster hypothesis, which states that documents that cluster together have a similar relevance to a given query. However, while this hypothesis has been demonstrated to hold in classical information retrieval environments, it has never been fully tested in heterogeneous distributed information retrieval environments. Heterogeneous document representations, the presence of document duplicates, and disparate qualities of retrieval results, are major features of an heterogeneous distributed information retrieval environment that might disrupt the effectiveness of the cluster hypothesis. In this paper we report on an experimental investigation into the validity and effectiveness of the cluster hypothesis in highly heterogeneous distributed information retrieval environments. The results show that although clustering is affected by different retrieval results representations and quality, the cluster hypothesis still holds and that generating hierarchical clusters in highly heterogeneous distributed information retrieval environments is still a very effective way of presenting retrieval results to users.
  3. Severiens, T.; Hohlfeld, M.; Zimmermann, K.; Hilf, E.R.: PhysDoc - a distributed network of physics institutions documents : collecting, indexing, and searching high quality documents by using harvest (2000) 0.01 
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    Abstract
    PhysNet offers online services that enable a physicist to keep in touch with the worldwide physics community and to receive all information he or she may need. In addition to being of great value to physicists, these services are practical examples of the use of modern methods of digital libraries, in particular the use of metadata harvesting. One service is PhysDoc. This consists of a Harvest-based online information broker- and gatherer-network, which harvests information from the local web-servers of professional physics institutions worldwide (mostly in Europe and USA so far). PhysDoc focuses on scientific information posted by the individual scientist at his local server, such as documents, publications, reports, publication lists, and lists of links to documents. All rights are reserved for the authors who are responsible for the content and quality of their documents. PhysDis is an analogous service but specifically for university theses, with their dual requirements of examination work and publication. The strategy is to select high quality sites containing metadata. We report here on the present status of PhysNet, our experience in operating it, and the development of its usage. To continuously involve authors, research groups, and national societies is considered crucial for a future stable service.
  4. Banwell, L.: Developing and evaluation framework for a supranational digital library (2003) 0.01 
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    Abstract
    The paper will explore the issues surrounding the development of an evaluation framework for a supranational digital library system, as seen through the TEL (The European Library) project. It will describe work an the project to date, and seek to establish what are the key drivers, priorities and barriers encountered, in developing such a framework. TEL is being funded by the EU as an Accompanying Measure in the IST program. Its main focus of is an consensus building, and also includes preparatory technical work to develop testbeds, which will gauge to what extent interoperability is achievable. In order for TEL to take its place as a major Information Society initiative of the EU, it needs to be closely attuned to the needs, expectations and realities of its user communities, which comprise the citizens of the project's national partners. To this end the evaluation framework described in this paper, is being developed by establishing the users' viewpoints and priorities in relation to the key project themes. A summary of the issues to be used in the baseline, and to be expanded upon in the paper, follows: - Establishing the differing contexts of the national library partners, and the differing national priorities which will impact an TEL - Exploring the differing expectations relating to building and using the hybrid library - Exploring the differing expectations relating to TEL. TEL needs to add value - what does this mean in each partner state, and for the individuals within them? 1. Introduction to TEL TEL (The European Library) is a thirty month project, funded by the European Commission as part of its Fifth Framework Programme for research. It aims to set up a co-operative framework for access to the major national, mainly digital, collections in European national libraries. TEL is funded as an Accompanying Measure, designed to support the work of the IST (Information Society Technologies) Programme an the development of access to cultural and scientific knowledge. TEL will stop short of becoming a live service during the lifetime of the project, and is focused an ensuring co-operative and concerted approaches to technical and business issues associated with large-scale content development. It will lay the policy and technical groundwork towards a pan European digital library based an distributed digital collections, and providing seamless access to the digital resources of major European national libraries. It began in February, 2001, and has eight national library partners: Finland, Germany, Italy, the Netherlands, Portugal, Slovenia, Switzerland and the United Kingdom. It is also seeking to encourage the participation of all European national libraries in due course.
  5. Roszkowski, M.; Lukas, C.: ¬A distributed architecture for resource discovery using metadata (1998) 0.01 
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    Abstract
    This article describes an approach for linking geographically distributed collections of metadata so that they are searchable as a single collection. We describe the infrastructure, which uses standard Internet protocols such as the Lightweight Directory Access Protocol (LDAP) and the Common Indexing Protocol (CIP), to distribute queries, return results, and exchange index information. We discuss the advantages of using linked collections of authoritative metadata as an alternative to using a keyword indexing search-engine for resource discovery. We examine other architectures that use metadata for resource discovery, such as Dienst/NCSTRL, the AHDS HTTP/Z39.50 Gateway, and the ROADS initiative. Finally, we discuss research issues and future directions of the project. The Internet Scout Project, which is funded by the National Science Foundation and is located in the Computer Sciences Department at the University of Wisconsin-Madison, is charged with assisting the higher education community in resource discovery on the Internet. To that end, the Scout Report and subsequent subject-specific Scout Reports were developed to guide the U.S. higher education community to research-quality resources. The Scout Report Signpost utilizes the content from the Scout Reports as the basis of a metadata collection. Signpost consists of more than 2000 cataloged Internet sites using established standards such as Library of Congress subject headings and abbreviated call letters, and emerging standards such as the Dublin Core (DC). This searchable and browseable collection is free and freely accessible, as are all of the Internet Scout Project's services.
  6. Milanesi, C.: Möglichkeiten der Kooperation im Rahmen von Subject Gateways : das Euler-Projekt im Vergleich mit weiteren europäischen Projekten (2001) 0.00 
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    Date
    22. 6.2002 19:41:59
  7. Dupuis, P.; Lapointe, J.: Developpement d'un outil documentaire à Hydro-Quebec : le Thesaurus HQ (1997) 0.00 
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    Source
    Argus. 26(1997) no.3, S.16-22
  8. Dempsey, L.; Russell, R.; Kirriemur, J.W.: Towards distributed library systems : Z39.50 in a European context (1996) 0.00 
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    Source
    Program. 30(1996) no.1, S.1-22
  9. Ashton, J.: ONE: the final OPAC frontier (1998) 0.00 
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    Source
    Select newsletter. 1998, no.22, Spring, S.5-6
  10. Lunau, C.D.: Z39.50: a critical component of the Canadian resource sharing infrastructure : implementation activities and results achieved (1997) 0.00 
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    Date
    3. 3.1999 17:22:57
  11. Burrows, T.: ¬The virtual catalogue : bibliographic access for the virtual library (1993) 0.00 
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    Date
    8.10.2000 14:47:22
  12. Kaizik, A.; Gödert, W.; Milanesi, C.: Erfahrungen und Ergebnisse aus der Evaluierung des EU-Projektes EULER im Rahmen des an der FH Köln angesiedelten Projektes EJECT (Evaluation von Subject Gateways des World Wide Web (2001) 0.00 
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    Date
    22. 6.2002 19:42:22
  13. Heery, R.: Information gateways : collaboration and content (2000) 0.00 
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    Date
    22. 6.2002 19:38:54
  14. Barker, P.: ¬A study of the use of the X.500 directory for bibliographic querying (1995) 0.00 
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    Abstract
    Reports on the work of the ABDUX project to investigate the use of the standardized protocol for the X.500 directory service for searching distributed bibliographic databases. It is a joint project between the Computer Science Department of the University College London, and the Library and Computer Service of Brunel University, UK. Gives a design overview and discusses the implementation phase of the project which involved: enhancements to an X.500 system; implementing user interfaces; and gathering test data for the system. Examines experiences with the system, and assesses why interest in the system has been less than hoped for. Puts forward a model for bibliographic querying which recognises the role of other protocols. Summarizes the main lessons to be drawn from the project
  15. Neuroth, H.; Lepschy, P.: ¬Das EU-Projekt Renardus (2001) 0.00 
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    Date
    22. 6.2002 19:32:15
  16. Avrahami, T.T.; Yau, L.; Si, L.; Callan, J.P.: ¬The FedLemur project : Federated search in the real world (2006) 0.00 
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    22. 7.2006 16:02:07
  17. Meiert, M.: Elektronische Publikationen an Hochschulen : Modellierung des elektronischen Publikationsprozesses am Beispiel der Universität Hildesheim (2006) 0.00 
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    1. 9.2006 13:22:15
  18. Nicholson, D.; Steele, M.: CATRIONA : a distributed, locally-oriented, Z39.50 OPAC-based approach to cataloguing the Internet (1996) 0.00 
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    Cataloging and classification quarterly. 22(1996) nos.3/4, S.127-141
  19. Collier, M.: ¬The business aims of eight national libraries in digital library co-operation : a study carried out for the business plan of The European Library (TEL) project (2005) 0.00 
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    Abstract
    Purpose - To describe the process and results of the business-planning workpackage of The European Library (TEL) project, in which eight national libraries collaborated on a joint approach to access to their digital libraries. Design/methodology/approach - The methodology was in three parts: first, a literature review and the mapping of the partners' existing and planned digital products and services, then a structured interview or survey to determine the partners' business requirements from TEL, then a harmonization process, and finally the results were then combined with normal business planning elements to produce a mission and final business plan. Findings - Business planning for digital libraries has hitherto not been widely reported. The methodology proved to be an effective method of achieving mutual agreement among partners with widely different aims and characteristics. Eleven harmonized service aspirations were agreed and five categories of business aims. Research limitations/implications - Focused on the business aims of national libraries, but the methodology can be relevant to other collaborative projects. Together with the few existing other reports, this can form the basis for a new field of work. Practical implications - The work described led directly to the creation of an operational service, which will be open to all European national libraries. Originality/value - As far as is known, the first reporting of a collaborative international planning process for a digital library, and maybe the first multi-partner business plan between national libraries.
  20. Cousins, S.; Sanders, A.: Incorporating a virtual union catalogue into the wider information environment through the application of middleware: Interoperability issues in cross-database access (2006) 0.00 
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    Abstract
    Purpose - To explore the use of middleware to provide access to a virtual catalogue via Z39.50, allowing its integration with other services. To consider issues arising from the cross-database search process and the problem of interoperability between systems. Design/methodology/approach - Middleware was used to establish a Z39.50 server for an existing virtual union catalogue, InforM25. The Copac physical union catalogue was used to carry out cross-database search tests, investigating the value of query transformation by the middleware and illustrating many of the issues associated with interoperability in cross-database searching. Findings - The test results demonstrate the viability and benefits of using middleware to allow the integration of virtual catalogues with other services. The results also illustrate the range of issues affecting the performance of the virtual catalogue, with supporting evidence from the use of the Copac physical union catalogue for cross-database searching via Z39.50. In particular the discussion highlights the issue of semantic interoperability, as well as emphasising the value of centralised virtual catalogue support. Research limitations/implications - The research was limited to work on a specific virtual union catalogue, that is InforM25, but the results highlight issues with general relevance in the development of any virtual catalogue. The need for more work on response times in the virtual union catalogue is apparent, along with the related issue of result set post processing. Originality/value - This paper provides a practical demonstration of the issues important to those involved in making their local catalogue accessible to services, and individuals, outside their own institution, as well as those working on virtual union catalogue development.

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