Search (102 results, page 1 of 6)

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Abstract

Purpose - The purpose of this paper is to report an investigation into the ways in which Canadian digital library collections have incorporated knowledge organization systems into their search interfaces. Design/methodology/approach - A combination of data-gathering techniques was used. These were as follows: a review of the literature related to the application of knowledge organization systems, deep scanning of Canadian governmental and academic institutions web sites on the web, identify and contact researchers in the area of knowledge organization, and identify and contact people in the governmental organizations who are involved in knowledge organization and information management. Findings - A total of 33 digital collections were identified that have made use of some type of knowledge organization system. Thesauri, subject heading lists and classification schemes were the widely used knowledge organization systems in the surveyed Canadian digital library collections. Research limitations/implications - The target population for this research was limited to governmental and academic digital library collections. Practical implications - An evaluation of the knowledge organization systems interfaces showed that searching, browsing and navigation facilities as well as bilingual features call for improvements. Originality/value - This research contributes to the following areas: digital libraries, knowledge organization systems and services and search interface design.

Source

Online information review. 29(2005) no.6, S.604-620

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Abstract

The strongest tradition of IR systems evaluation has focused on system effectiveness; more recently, there has been a growing interest in evaluation of Interactive IR systems, balancing system and user-oriented evaluation criteria. In this paper we shift the focus to considering how IR systems, and particularly digital libraries, can be evaluated to assess (and improve) their fit with users' broader work activities. Taking this focus, we answer a different set of evaluation questions that reveal more about the design of interfaces, user-system interactions and how systems may be deployed in the information working context. The planning and conduct of such evaluation studies share some features with the established methods for conducting IR evaluation studies, but come with a shift in emphasis; for example, a greater range of ethical considerations may be pertinent. We present the PRET A Rapporter framework for structuring user-centred evaluation studies and illustrate its application to three evaluation studies of digital library systems.

Footnote

Beitrag eines Themenbereichs: Evaluation of Interactive Information Retrieval Systems

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Abstract

This article describes two approaches for searching heterogeneous resources, which are explained as they are used in two corresponding existing systems-RIRS (Resource Integration Retrieval System) and HRUSP (Heterogeneous Resource Union Search Platform). On analyzing the existing systems, a possible framework-the MUSP (Multimetadata-Based Union Search Platform) is presented. Libraries now face a dilemma. On one hand, libraries subscribe to many types of database retrieval systems that are produced by various providers. The libraries build their data and information systems independently. This results in highly heterogeneous and distributed systems at the technical level (e.g., different operating systems and user interfaces) and at the conceptual level (e.g., the same objects are named using different terms). On the other hand, end users want to access all these heterogeneous data via a union interface, without having to know the structure of each information system or the different retrieval methods used by the systems. Libraries must achieve a harmony between information providers and users. In order to bridge the gap between the service providers and the users, it would seem that all source databases would need to be rebuilt according to a uniform data structure and query language, but this seems impossible. Fortunately, however, libraries and information and technology providers are now making an effort to find a middle course that meets the requirements of both data providers and users. They are doing this through resource integration.

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Abstract

Many subject specific portals were built during the last year. Most of these are simple user-interfaces to databases of subject specific information added with several lists of links. This centralised type of portal often looks fine with its consistent facing but is hard to keep up to date and high priced to maintain. Users expect a service be malntained and available 24 hours, 365 days for at least 10 years and this all free of charge. On the one hand, it seams to be impossible to set up a service matching all this demands, an the other hand, many institutions offer information and services which could be parts of a portal, which are maintained frequently and paid by public via these institutions. The idea is, to collect the existing information and present it in a structured and consistent way. This idea matches in an excellent way with the way knowledge is produced in Physics. Physicists work all over the world often an different continents an the same topic, knowing each others work only from their publications, conferences and online-communication. Information in Physics is published in quite different ways, by journal articles, which can be reviewed, sometimes by peer, or pre-prints. Many information is available in non-textual genres like software sources or datasets or mathematical formula. Distributed Portals make use of the existing information an the web. In the early days of the web, the very popular link-lists where a kind of portal, linking to (all) pages with information an the specific topic. Indeed, these link lists had many properties of modern portals, offering information in a structured and selected way. But they did not offer the information under a common layout (desktop) and did not offer user-specific views onto the information. Modern distributed portals combine the advantages of centralised portals (high information structure, common layout, easy navigation through all the information) with the possibilities of distributed portals (up to date information, low budget implementation, good knowledge coverage).

Source

Gaining insight from research information (CRIS2002): Proceedings of the 6th International Conference an Current Research Information Systems, University of Kassel, August 29 - 31, 2002. Eds: W. Adamczak u. A. Nase

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Abstract

Service-oriented architectures, and the wider acceptance of decentralized peer-to-peer architectures enable the transition from integrated, centrally controlled systems to federated and dynamic configurable systems. The benefits for the individual service providers and users are robustness of the system, independence of central authorities and flexibility in the usage of services. This chapter provides details of the European project BRICKS, which aims at enabling integrated access to distributed resources in the Cultural Heritage domain. The target audience is broad and heterogeneous and involves cultural heritage and educational institutions, the research community, industry, and the general public. The project idea is motivated by the fact that the amount of digital information and digitized content is continuously increasing but still much effort has to be expended to discover and access it. The reasons for such a situation are heterogeneous data formats, restricted access, proprietary access interfaces, etc. Typical usage scenarios are integrated queries among several knowledge resource, e.g. to discover all Italian artifacts from the Renaissance in European museums. Another example is to follow the life cycle of historic documents, whose physical copies are distributed all over Europe. A standard method for integrated access is to place all available content and metadata in a central place. Unfortunately, such a solution requires a quite powerful and costly infrastructure if the volume of data is large. Considerations of cost optimization are highly important for Cultural Heritage institutions, especially if they are funded from public money. Therefore, better usage of the existing resources, i.e. a decentralized/P2P approach promises to deliver a significantly less costly system,and does not mean sacrificing too much on the performance side.

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Abstract

As digital libraries become a major source of information for many people, we need to know more about how people seek and retrieve information in digital environments. Quite commonly, users with a problem-at-hand and associated question-in-mind repeatedly search a literature for answers, and seek information in stages over extended periods from a variety of digital information resources. The process of repeatedly searching over time in relation to a specific, but possibly an evolving information problem (including changes or shifts in a variety of variables), is called the successive search phenomenon. The study outlined in this paper is currently investigating this new and little explored line of inquiry for information retrieval, Web searching, and digital libraries. The purpose of the research project is to investigate the nature, manifestations, and behavior of successive searching by users in digital environments, and to derive criteria for use in the design of information retrieval interfaces and systems supporting successive searching behavior. This study includes two related projects. The first project is based in the School of Library and Information Sciences at the University of North Texas and is funded by a National Science Foundation POWRE Grant <http://www.nsf.gov/cgi-bin/show?award=9753277>. The second project is based at the Department of Information Studies at the University of Sheffield (UK) and is funded by a grant from the British Library <http://www.shef. ac.uk/~is/research/imrg/uncerty.html> Research and Innovation Center. The broad objectives of each project are to examine the nature and extent of successive search episodes in digital environments by real users over time. The specific aim of the current project is twofold: * To characterize progressive changes and shifts that occur in: user situational context; user information problem; uncertainty reduction; user cognitive styles; cognitive and affective states of the user, and consequently in their queries; and * To characterize related changes over time in the type and use of information resources and search strategies particularly related to given capabilities of IR systems, and IR search engines, and examine changes in users' relevance judgments and criteria, and characterize their differences. The study is an observational, longitudinal data collection in the U.S. and U.K. Three questionnaires are used to collect data: reference, client post search and searcher post search questionnaires. Each successive search episode with a search intermediary for textual materials on the DIALOG Information Service is audiotaped and search transaction logs are recorded. Quantitative analysis includes statistical analysis using Likert scale data from the questionnaires and log-linear analysis of sequential data. Qualitative methods include: content analysis, structuring taxonomies; and diagrams to describe shifts and transitions within and between each search episode. Outcomes of the study are the development of appropriate model(s) for IR interactions in successive search episodes and the derivation of a set of design criteria for interfaces and systems supporting successive searching.

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Date

22. 6.2002 19:42:47

Source

International cataloguing and bibliographic control. 29(2000) no.3, S.45-48

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Abstract

The explosive growth of literature and data in the life sciences challenges researchers to keep track of current advancements in their disciplines. Novel approaches in the life science like the One Health paradigm require integrated methodologies in order to link and connect heterogeneous information from databases and literature resources. Current publications in the life sciences are increasingly characterized by the employment of trans-disciplinary methodologies comprising molecular and cell biology, genetics, genomic, epigenomic, transcriptional and proteomic high throughput technologies with data from humans, plants, and animals. The literature search engine LIVIVO empowers retrieval functionality by incorporating various literature resources from medicine, health, environment, agriculture and nutrition. LIVIVO is developed in-house by ZB MED - Information Centre for Life Sciences. It provides a user-friendly and usability-tested search interface with a corpus of 55 Million citations derived from 50 databases. Standardized application programming interfaces are available for data export and high throughput retrieval. The search functions allow for semantic retrieval with filtering options based on life science entities. The service oriented architecture of LIVIVO uses four different implementation layers to deliver search services. A Knowledge Environment is developed by ZB MED to deal with the heterogeneity of data as an integrative approach to model, store, and link semantic concepts within literature resources and databases. Future work will focus on the exploitation of life science ontologies and on the employment of NLP technologies in order to improve query expansion, filters in faceted search, and concept based relevancy rankings in LIVIVO.

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Footnote

Rez.: ZfBB 52(2005) H.1, S.52-53 (N. Lossau: "Service-Gedanke Digitale Bibliotheken gehören heute bereits zum selbstverständlichen Vokabular von Bibliothekaren und es gibt wohl kaum einen Internetauftritt von Bibliotheken, der nicht eine Digitale Bibliothek beinhaltet. Fast ebenso vielfältig wie die Vorkommen sind auch die Ausprägungen und Definitionen von Digitalen Bibliotheken, weshalb man mit einer Mischung aus Interesse und Skepsis das vorliegende Buch in die Hand nimmt. »The ultimate digital library«, ein ambitionierter Titel, vom Autor und der American Library Association, in deren Reihe die Publikation erschienen ist, wohl nicht zuletzt aus Marketinggründen wohlbedacht gewählt, suggeriert dem Leser, dass hier die vollendete, perfekte Form einer Digitalen Bibliothek beschrieben wird, die sich seit den goer Jahren mit rasantem Tempo entwickelt hat. Es dauert eine ganze Weile, bis der Leser auf die Definition von Pace stößt, die sich als roter Faden durch sein Werk zieht: »The digital library - a comprehensive definition will not be attempted here - encompasses not only collections in digital form, but digital services that continue to define the library as a place.« (S.73) Pace konzentriert sich auf den ServiceAspekt von Digitalen Bibliotheken und zielt damit auf eine Entwicklung ab, die in der Tat als zukunftsweisend für Bibliotheken und Digitale Bibliotheken zu gelten hat. Zu lange haben Bibliotheken sich schwerpunktmäßig auf die digitalen Sammlungen und ihre Produktion (durch Digitalisierung) oder Kauf und Lizenzierung konzentriert, wie Pace zu Recht an der gleichen Stelle beklagt. Die Zukunft mussfür Bibliotheken in der Entwicklung und Bereitstellung von digitalen Services liegen, die den Endnutzern einen echten Mehrwert zu bieten haben. Darin liegt sein Verständnis einer ultimativen Digitalen Bibliothek begründet, ohne dass er die Definition ausführlicher thematisiert. Pace räumt in diesem Zusammenhang auch mit einem Mythos auf, der die Digitalen Bibliotheken lediglich als »Hilfsdienste« einer traditionellen Bibliothek betrachtet. Wesentlich sympathischer und realistischer erscheint dem Leser die folgende Charakterisierung des Verhältnisses: »The digital-traditional relationship is symbiotic, not parasitic: digital tools, services, and expertise exist to enhance the services and collections of libraries, not necessarily to replace them.« (S. 73) Kooperation mit SoftwareAnbietern Der inhaltliche Leitgedanke der digitalen Services ist auch eine ideale Basis für eine weitere Botschaft von Pace, die er mit seinem Buch vermitteln möchte: Bibliothekare und Anbietervon BibliotheksSoftware müssen bei der Entwicklung dieser Services eng zusammenarbeiten. Glaubt man dem Vorwort, dann stellt das Verhältnis von »libraries and vendors« [Bibliotheken und Anbietern] die Ausgangsthematik für die Publikation dar, wie sie von der American Library Association bei Pace in Auftrag gegeben wurde. Dieserverfügt offensichtlich über den geeigneten Erfahrungshintergrund, um eine solche Beschreibung abzuliefern. Nach seinem Studiumsabschluss als M.S.L.S. begann er seine berufliche Laufbahn zunächst für mehr als drei Jahre bei der Firma für Software zur Bibliotheksautomatisierung, Innovative Interfaces,woer unteranderem als Spezialist zur Produktintegration von z.B. WebPAC,Advanced Keyword Search arbeitete. Heute ist Pace »Head of Systems« an den North Carolina State University Libraries (Raleigh, N.C.) und ständiger Kolumnist in dem Magazin Computers in Libraries.

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Abstract

Clearinghouses - or subject gateways - are domain-specific collections of links to resources an the Internet. The links are described with metadata and structured according to a domain-specific subject hierarchy. Users access the information by searching in the metadata or by browsing the subject hierarchy. The standards for metadata vary across existing Clearinghouses and different technologies for storing and accessing the metadata are used. This makes it difficult to distribute the editorial or administrative work involved in maintaining a clearinghouse, or to exchange information with other systems. DBClear is a generic, platform-independent clearinghouse system, whose metadata schema can be adapted to different standards. The data is stored in a relational database. It includes a workflow component to Support distributed maintenance and automation modules for link checking and metadata extraction. The presentation of the clearinghouse an the Web can be modified to allow seamless integration into existing web sites.

Source

Gaining insight from research information (CRIS2002): Proceedings of the 6th International Conference an Current Research Information Systems, University of Kassel, August 29 - 31, 2002. Eds: W. Adamczak u. A. Nase

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Abstract

Flexible organization of information is one of the key design challenges in any digital library. For the past year, we have been working with members of the National Digital Library Project (NDLP) at the Library of Congress to build an experimental system to organize and store library collections. This is a report on the work. In particular, we describe how a few technical building blocks are used to organize the material in collections, such as the NDLP's, and how these methods fit into a general distributed computing framework. The technical building blocks are part of a framework that evolved as part of the Computer Science Technical Reports Project (CSTR). This framework is described in the paper, "A Framework for Distributed Digital Object Services", by Robert Kahn and Robert Wilensky (1995). The main building blocks are: "digital objects", which are used to manage digital material in a networked environment; "handles", which identify digital objects and other network resources; and "repositories", in which digital objects are stored. These concepts are amplified in "Key Concepts in the Architecture of the Digital Library", by William Y. Arms (1995). In summer 1995, after earlier experimental development, work began on the implementation of a full digital library system based on this framework. In addition to Kahn/Wilensky and Arms, several working papers further elaborate on the design concepts. A paper by Carl Lagoze and David Ely, "Implementation Issues in an Open Architectural Framework for Digital Object Services", delves into some of the repository concepts. The initial repository implementation was based on a paper by Carl Lagoze, Robert McGrath, Ed Overly and Nancy Yeager, "A Design for Inter-Operable Secure Object Stores (ISOS)". Work on the handle system, which began in 1992, is described in a series of papers that can be found on the Handle Home Page. The National Digital Library Program (NDLP) at the Library of Congress is a large scale project to convert historic collections to digital form and make them widely available over the Internet. The program is described in two articles by Caroline R. Arms, "Historical Collections for the National Digital Library". The NDLP itself draws on experience gained through the earlier American Memory Program. Based on this work, we have built a pilot system that demonstrates how digital objects can be used to organize complex materials, such as those found in the NDLP. The pilot was demonstrated to members of the library in July 1996. The pilot system includes the handle system for identifying digital objects, a pilot repository to store them, and two user interfaces: one designed for librarians to manage digital objects in the repository, the other for library patrons to access the materials stored in the repository. Materials from the NDLP's Coolidge Consumerism compilation have been deposited into the pilot repository. They include a variety of photographs and texts, converted to digital form. The pilot demonstrates the use of handles for identifying such material, the use of meta-objects for managing sets of digital objects, and the choice of metadata. We are now implementing an enhanced prototype system for completion in early 1997.

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Source

Gaining insight from research information (CRIS2002): Proceedings of the 6th International Conference an Current Research Information Systems, University of Kassel, August 29 - 31, 2002. Eds: W. Adamczak u. A. Nase

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Date

29. 8.2004 9:17:18

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Date

17. 7.1996 9:33:22

Source

Frankfurter Rundschau. Nr.196 vom 23.8.2003, S.29

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Date

22. 2.2009 19:10:56

Source

Dialog mit Bibliotheken. 20(2008) H.1, S.29-31

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Date

22. 6.2002 19:40:22

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Date

29. 1.1997 18:49:05

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Date

22. 6.2002 19:43:01

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Date

29. 8.2004 9:14:57

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Date

6.10.2002 14:34:29