-
Johnson, E.H.: Objects for distributed heterogeneous information retrieval (2000)
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- Abstract
- The success of the World Wide Web Shows that we can access, search, and retrieve information from globally distributed databases. lf a database, such as a library catalog, has some sort of Web-based front end, we can type its URL into a Web browser and use its HTML-based forms to search for items in that database. Depending an how well the query conforms to the database content, how the search engine interprets the query, and how the server formats the results into HTML, we might actually find something usable. While the first two issues depend an ourselves and the server, an the Web the latter falls to the mercy of HTML, which we all know as a great destroyer of information because it codes for display but not for content description. When looking at an HTML-formatted display, we must depend an our own interpretation to recognize such entities as author names, titles, and subject identifiers. The Web browser can do nothing but display the information. lf we want some other view of the result, such as sorting the records by date (provided it offers such an option to begin with), the server must do it. This makes poor use of the computing power we have at the desktop (or even laptop), which, unless it involves retrieving more records, could easily do the result Set manipulation that we currently send back to the server. Despite having personal computers wich immense computational power, as far as information retrieval goes, we still essentially use them as dumb terminals.
- Date
- 22. 9.1997 19:16:05
-
Heery, R.: Information gateways : collaboration and content (2000)
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- Abstract
- Information subject gateways provide targeted discovery services for their users, giving access to Web resources selected according to quality and subject coverage criteria. Information gateways recognise that they must collaborate on a wide range of issues relating to content to ensure continued success. This report is informed by discussion of content activities at the 1999 Imesh Workshop. The author considers the implications for subject based gateways of co-operation regarding coverage policy, creation of metadata, and provision of searching and browsing across services. Other possibilities for co-operation include working more closely with information providers, and diclosure of information in joint metadata registries
- Date
- 22. 6.2002 19:38:54
-
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)
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- Date
- 22. 6.2002 19:42:22
-
Avrahami, T.T.; Yau, L.; Si, L.; Callan, J.P.: ¬The FedLemur project : Federated search in the real world (2006)
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- Abstract
- Federated search and distributed information retrieval systems provide a single user interface for searching multiple full-text search engines. They have been an active area of research for more than a decade, but in spite of their success as a research topic, they are still rare in operational environments. This article discusses a prototype federated search system developed for the U.S. government's FedStats Web portal, and the issues addressed in adapting research solutions to this operational environment. A series of experiments explore how well prior research results, parameter settings, and heuristics apply in the FedStats environment. The article concludes with a set of lessons learned from this technology transfer effort, including observations about search engine quality in the real world.
- Date
- 22. 7.2006 16:02:07
-
Polleres, A.; Lausen, H.; Lara, R.: Semantische Beschreibung von Web Services (2006)
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- Abstract
- In diesem Kapitel werden Anwendungsgebiete und Ansätze für die semantische Beschreibung von Web Services behandelt. Bestehende Web Service Technologien leisten einen entscheidenden Beitrag zur Entwicklung verteilter Anwendungen dadurch, dass weithin akzeptierte Standards vorliegen, die die Kommunikation zwischen Anwendungen bestimmen und womit deren Kombination zu komplexeren Einheiten ermöglicht wird. Automatisierte Mechanismen zum Auffinden geeigneter Web Services und deren Komposition dagegen werden von bestehenden Technologien in vergleichsweise geringem Maß unterstützt. Ähnlich wie bei der Annotation statischer Daten im "Semantic Web" setzen Forschung und Industrie große Hoffnungen in die semantische Beschreibung von Web Services zur weitgehenden Automatisierung dieser Aufgaben.
- Source
- Semantic Web: Wege zur vernetzten Wissensgesellschaft. Hrsg.: T. Pellegrini, u. A. Blumauer
-
Lopatenko, A.; Asserson, A.; Jeffery, K.G.: CERIF - Information retrieval of research information in a distributed heterogeneous environment (2002)
0.02
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- Abstract
- User demands to have access to complete and actual information about research may require integration of data from different CRISs. CRISs are rarely homogenous systems and problems of CRISs integration must be addressed from technological point of view. Implementation of CRIS providing access to heterogeneous data distributed among a number of CRISs is described. A few technologies - distributed databases, web services, semantic web are used for distributed CRIS to address different user requirements. Distributed databases serve to implement very efficient integration of homogenous systems, web services - to provide open access to research information, semantic web - to solve problems of integration semantically and structurally heterogeneous data sources and provide intelligent data retrieval interfaces. The problems of data completeness in distributed systems are addressed and CRIS-adequate solution for data completeness is suggested.
-
Lügger, J.: Offene Navigation und Suchmaschinen in Verbünden, Konsortien und den Wissenschaften (2004)
0.02
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- Abstract
- Integration der Navigation und Suche in lizenzierten Journalen und gleichzeitig in freien digitalen Dokumenten unter einer einheitlichen konsistenten Nutzeroberflache ist eines der ungelösten F&E-Probleme der Fachinformation. Hierbei müssen Elemente des Invisible Web und des Visible Web unter Berücksichtigung offener Standards nahtlos miteinander verbunden werden. Der Artikel beschreibt Ausgangspunkt und Entwicklungsgeschichte eines kooperativen Vorhabens "Verteilter Zeitschriftenserver", das sich auf dem Wege über eine Generalisierung zum "Verteilten Dokumentenserver" zur Basis der Kooperation von vascoda und AGVerbund mit dem Ziel der Realisierung einer Offenen Digitalen Bibliothek der Wissenschaften entwickelte.
-
Dupuis, P.; Lapointe, J.: Developpement d'un outil documentaire à Hydro-Quebec : le Thesaurus HQ (1997)
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- Source
- Argus. 26(1997) no.3, S.16-22
-
Dempsey, L.; Russell, R.; Kirriemur, J.W.: Towards distributed library systems : Z39.50 in a European context (1996)
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- Source
- Program. 30(1996) no.1, S.1-22
-
Ashton, J.: ONE: the final OPAC frontier (1998)
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- Source
- Select newsletter. 1998, no.22, Spring, S.5-6
-
Lunau, C.D.: Z39.50: a critical component of the Canadian resource sharing infrastructure : implementation activities and results achieved (1997)
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- Date
- 3. 3.1999 17:22:57
-
Burrows, T.: ¬The virtual catalogue : bibliographic access for the virtual library (1993)
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- Date
- 8.10.2000 14:47:22
-
Mönnich, M.; Dierolf, U.: 20 Jahre Karlsruher virtueller Katalog (KVK) (2016)
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- Abstract
- Vor 20 Jahren, genau gesagt am 26. Juli 1996, erblickte die Literatursuchmaschine "KVK" das Licht der Internet-Welt. Seit damals wurden mehrere Milliarden Suchanfragen von Karlsruhe aus an andere Web-Kataloge von Bibliotheken und Verbünden geschickt, Trefferlisten ausgewertet und den Nutzern in einheitlicher Form präsentiert. Dieser Beitrag erklärt, warum der KVK entwickelt wurde und warum es diesen "Internet-Dino" auch heute noch gibt und beschreibt den aktuellen Stand.
-
Stark, T.: ¬The Net and Z39.50 : toward a virtual union catalog (1997)
0.01
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- Abstract
- The State Library of Iowa, USA, received a Higher Education Act title II grant from the US Dept. of Education in 1994 to create a demonstration project of new library information technologies. Describes 2 interlinked components of the project: Web-based union catalogue development and statewide deployment of the ANSI/NISO Z39.50 standard for database search and retrieval. Z39.50 was chosen because of its ability to searching multiple remote databases in a single session and its common interface across a variety of implementations. Use of a distributed Z39.50 search makes the need for maintaining large union catalogues unnecessary
-
Ghiselli, C.; Padula, M.: ¬A unified access to extract knowledge from heterogeneous Web archives (2001)
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-
Zia, L.L.: Growing a national learning environments and resources network for science, mathematics, engineering, and technology education : current issues and opportunities for the NSDL program (2001)
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- Abstract
- The National Science Foundation's (NSF) National Science, Mathematics, Engineering, and Technology Education Digital Library (NSDL) program seeks to create, develop, and sustain a national digital library supporting science, mathematics, engineering, and technology (SMET) education at all levels -- preK-12, undergraduate, graduate, and life-long learning. The resulting virtual institution is expected to catalyze and support continual improvements in the quality of science, mathematics, engineering, and technology (SMET) education in both formal and informal settings. The vision for this program has been explored through a series of workshops over the past several years and documented in accompanying reports and monographs. (See [1-7, 10, 12, and 13].) These efforts have led to a characterization of the digital library as a learning environments and resources network for science, mathematics, engineering, and technology education, that is: * designed to meet the needs of learners, in both individual and collaborative settings; * constructed to enable dynamic use of a broad array of materials for learning primarily in digital format; and * managed actively to promote reliable anytime, anywhere access to quality collections and services, available both within and without the network. Underlying the NSDL program are several working assumptions. First, while there is currently no lack of "great piles of content" on the Web, there is an urgent need for "piles of great content". The difficulties in discovering and verifying the authority of appropriate Web-based material are certainly well known, yet there are many examples of learning resources of great promise available (particularly those exploiting the power of multiple media), with more added every day. The breadth and interconnectedness of the Web are simultaneously a great strength and shortcoming. Second, the "unit" or granularity of educational content can and will shrink, affording the opportunity for users to become creators and vice versa, as learning objects are reused, repackaged, and repurposed. To be sure, this scenario cannot take place without serious attention to intellectual property and digital rights management concerns. But new models and technologies are being explored (see a number of recent articles in the January issue of D-Lib Magazine). Third, there is a need for an "organizational infrastructure" that facilitates connections between distributed users and distributed content, as alluded to in the third bullet above. Finally, while much of the ongoing use of the library is envisioned to be "free" in the sense of the public good, there is an opportunity and a need to consider multiple alternative models of sustainability, particularly in the area of services offered by the digital library. More details about the NSDL program including information about proposal deadlines and current awards may be found at <http://www.ehr.nsf.gov/ehr/due/programs/nsdl>.
-
Neuroth, H.; Lepschy, P.: ¬Das EU-Projekt Renardus (2001)
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- Date
- 22. 6.2002 19:32:15
-
Meiert, M.: Elektronische Publikationen an Hochschulen : Modellierung des elektronischen Publikationsprozesses am Beispiel der Universität Hildesheim (2006)
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- Date
- 1. 9.2006 13:22:15
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Nicholson, D.; Steele, M.: CATRIONA : a distributed, locally-oriented, Z39.50 OPAC-based approach to cataloguing the Internet (1996)
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- Source
- Cataloging and classification quarterly. 22(1996) nos.3/4, S.127-141
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Croft, W.B.: Combining approaches to information retrieval (2000)
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- Abstract
- The combination of different text representations and search strategies has become a standard technique for improving the effectiveness of information retrieval. Combination, for example, has been studied extensively in the TREC evaluations and is the basis of the "meta-search" engines used on the Web. This paper examines the development of this technique, including both experimental results and the retrieval models that have been proposed as formal frameworks for combination. We show that combining approaches for information retrieval can be modeled as combining the outputs of multiple classifiers based on one or more representations, and that this simple model can provide explanations for many of the experimental results. We also show that this view of combination is very similar to the inference net model, and that a new approach to retrieval based on language models supports combination and can be integrated with the inference net model
