543 research outputs found

    Federating Heterogeneous Digital Libraries by Metadata Harvesting

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    This dissertation studies the challenges and issues faced in federating heterogeneous digital libraries (DLs) by metadata harvesting. The objective of federation is to provide high-level services (e.g. transparent search across all DLs) on the collective metadata from different digital libraries. There are two main approaches to federate DLs: distributed searching approach and harvesting approach. As the distributed searching approach replies on executing queries to digital libraries in real time, it has problems with scalability. The difficulty of creating a distributed searching service for a large federation is the motivation behind Open Archives Initiatives Protocols for Metadata Harvesting (OAI-PMH). OAI-PMH supports both data providers (repositories, archives) and service providers. Service providers develop value-added services based on the information collected from data providers. Data providers are simply collections of harvestable metadata. This dissertation examines the application of the metadata harvesting approach in DL federations. It addresses the following problems: (1) Whether or not metadata harvesting provides a realistic and scalable solution for DL federation. (2) What is the status of and problems with current data provider implementations, and how to solve these problems. (3) How to synchronize data providers and service providers. (4) How to build different types of federation services over harvested metadata. (5) How to create a scalable and reliable infrastructure to support federation services. The work done in this dissertation is based on OAI-PMH, and the results have influenced the evolution of OAI-PMH. However, the results are not limited to the scope of OAI-PMH. Our approach is to design and build key services for metadata harvesting and to deploy them on the Web. Implementing a publicly available service allows us to demonstrate how these approaches are practical. The problems posed above are evaluated by performing experiments over these services. To summarize the results of this thesis, we conclude that the metadata harvesting approach is a realistic and scalable approach to federate heterogeneous DLs. We present two models of building federation services: a centralized model and a replicated model. Our experiments also demonstrate that the repository synchronization problem can be addressed by push, pull, and hybrid push/pull models; each model has its strengths and weaknesses and fits a specific scenario. Finally, we present a scalable and reliable infrastructure to support the applications of metadata harvesting

    JISC Preservation of Web Resources (PoWR) Handbook

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    Handbook of Web Preservation produced by the JISC-PoWR project which ran from April to November 2008. The handbook specifically addresses digital preservation issues that are relevant to the UK HE/FE web management community”. The project was undertaken jointly by UKOLN at the University of Bath and ULCC Digital Archives department

    CORE

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    Le présent document présente le CORE, un service de recherche largement utilisé, qui donne accès aux publications de recherche en libre accès, provenant d’un réseau mondial de dépôts. CORE a été créé dans le but de permettre l’exploration de textes et de données de la littérature scientifique et donc de soutenir la découverte scientifique, mais il est maintenant utilisé dans un large éventail de cas

    Access to Digital Cultural Heritage: Innovative Applications of Automated Metadata Generation Chapter 1: Digitization of Cultural Heritage – Standards, Institutions, Initiatives

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    The first chapter "Digitization of Cultural Heritage – Standards, Institutions, Initiatives" provides an introduction to the area of digitisation. The main pillars of process of creating, preserving and accessing of cultural heritage in digital space are observed. The importance of metadata in the process of accessing to information is outlined. The metadata schemas and standards used in cultural heritage are discussed. In order to reach digital objects in virtual space they are organized in digital libraries. Contemporary digital libraries are trying to deliver richer and better functionality, which usually is user oriented and depending on current IT trend. Additionally, the chapter is focused on some initiatives on world and European level that during the years enforce the process of digitization and organizing digital objects in the cultural heritage domain. In recent years, the main focus in the creation of digital resources shifts from "system-centred" to "user-centred" since most of the issues around this content are related to making it accessible and usable for the real users. So, the user studies and involving the users on early stages of design and planning the functionality of the product which is being developed stands on leading position

    Evaluation of the ILRI InfoCentre: Report of a Center-Commissioned External Review

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    Planning for the Lifecycle Management and Long-Term Preservation of Research Data: A Federated Approach

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    Outcomes of the grant are archived here.The “data deluge” is a recent but increasingly well-understood phenomenon of scientific and social inquiry. Large-scale research instruments extend our observational power by many orders of magnitude but at the same time generate massive amounts of data. Researchers work feverishly to document and preserve changing or disappearing habitats, cultures, languages, and artifacts resulting in volumes of media in various formats. New software tools mine a growing universe of historical and modern texts and connect the dots in our semantic environment. Libraries, archives, and museums undertake digitization programs creating broad access to unique cultural heritage resources for research. Global-scale research collaborations with hundreds or thousands of participants, drive the creation of massive amounts of data, most of which cannot be recreated if lost. The University of Kansas (KU) Libraries in collaboration with two partners, the Greater Western Library Alliance (GWLA) and the Great Plains Network (GPN), received an IMLS National Leadership Grant designed to leverage collective strengths and create a proposal for a scalable and federated approach to the lifecycle management of research data based on the needs of GPN and GWLA member institutions.Institute for Museum and Library Services LG-51-12-0695-1

    Metadata standards and practical guidelines for specimen and DNA curation when building barcode reference libraries for aquatic life

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    DNA barcoding and metabarcoding is increasingly used to effectively and precisely assess and monitor biodiversity in aquatic ecosystems. As these methods rely on data availability and quality of barcode reference libraries, it is important to develop and follow best practices to ensure optimal quality and traceability of the metadata associated with the reference barcodes used for identification. Sufficient metadata, as well as vouchers, corresponding to each reference barcode must be available to ensure reliable barcode library curation and, thereby, provide trustworthy baselines for downstream molecular species identification. This document (1) specifies the data and metadata required to ensure the relevance, the accessibility and traceability of DNA barcodes and (2) specifies the recommendations for DNA harvesting and for the storage of both voucher specimens/samples and barcode data.info:eu-repo/semantics/publishedVersio

    Research Information Systems in the Nordic Countries - Infrastructure, Concepts, and Organization

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    Used on the Copyright licens Creative Commons http://creativecommons.org/licenses/by-nc-nd/2.5/se/deed.en_GBA report about Research Information Systems in the Nordic Countries, Infrastructure, concepts and organizationThis report is commissioned by the Nordbib programme, and is based on a web survey of the current status of CRIS (Current Research Information Systems) and IR (Institutional Repositories) in the Nordic countries. The survey has been conducted to investigate how Nordic higher education institutions collect and present their research output. Do they use Institutional Repositories and/or Current Research Information Systems, are these systems separate or integrated, what software is used, and how are they staffed and financed? An important part of the survey was to analyse the perceived needs for national and Nordic coordination and support regarding such specific issues as rights management, central search services, educational and promotional materials etc. The survey results are presented against international developments in Open Access, both historical and current. The main purpose of the survey is to help Nordbib gather relevant information for promoting greater visibility to Nordic research and offer a background for creating a joint Nordic approach to further developments in Open Access. A presentation of the survey project was given at the Nordbib Workshop on ”Research Visibility – managing quality for better evaluation” 27-28 October, 2008. We would like to thank the members of the Nordbib workshop group for valuable viewpoints regarding the final formulations in the questionnaire. We also wish to thank all our contacts in the Nordic countries for their invaluable help in identifying respondents and providing us with email addresses, and other valuable advice and support
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