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Horch, A.; Kett, H.; Weisbecker, A.: Semantische Suchsysteme für das Internet : Architekturen und Komponenten semantischer Suchmaschinen (2013)
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- Abstract
- In der heutigen Zeit nimmt die Flut an Informationen exponentiell zu. In dieser »Informationsexplosion« entsteht täglich eine unüberschaubare Menge an neuen Informationen im Web: Beispielsweise 430 deutschsprachige Artikel bei Wikipedia, 2,4 Mio. Tweets bei Twitter und 12,2 Mio. Kommentare bei Facebook. Während in Deutschland vor einigen Jahren noch Google als nahezu einzige Suchmaschine beim Zugriff auf Informationen im Web genutzt wurde, nehmen heute die u.a. in Social Media veröffentlichten Meinungen und damit die Vorauswahl sowie Bewertung von Informationen einzelner Experten und Meinungsführer an Bedeutung zu. Aber wie können themenspezifische Informationen nun effizient für konkrete Fragestellungen identifiziert und bedarfsgerecht aufbereitet und visualisiert werden? Diese Studie gibt einen Überblick über semantische Standards und Formate, die Prozesse der semantischen Suche, Methoden und Techniken semantischer Suchsysteme, Komponenten zur Entwicklung semantischer Suchmaschinen sowie den Aufbau bestehender Anwendungen. Die Studie erläutert den prinzipiellen Aufbau semantischer Suchsysteme und stellt Methoden der semantischen Suche vor. Zudem werden Softwarewerkzeuge vorgestellt, mithilfe derer einzelne Funktionalitäten von semantischen Suchmaschinen realisiert werden können. Abschließend erfolgt die Betrachtung bestehender semantischer Suchmaschinen zur Veranschaulichung der Unterschiede der Systeme im Aufbau sowie in der Funktionalität.
- RSWK
- Suchmaschine / Semantic Web / Information Retrieval
Suchmaschine / Information Retrieval / Ranking / Datenstruktur / Kontextbezogenes System
- Subject
- Suchmaschine / Semantic Web / Information Retrieval
Suchmaschine / Information Retrieval / Ranking / Datenstruktur / Kontextbezogenes System
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Buchbinder, R.; Weidemüller, H.U.; Tiedemann, E.: Biblio-Data, die nationalbibliographische Datenbank der Deutschen Bibliothek (1979)
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- Abstract
- Die deutschen nationalbibliographische Datenbank Biblio-Data wird in Teil A mit ihren Grundlagen vorgestellt. Biblio-Data basiert auf dem Information-Retrieval-System STAIRS von IBM, das durch Zusatzprogramme der ZMD verbessert wurde. Das Hauptgewicht dieses Beitrags liegt auf der Erörterung des Biblio-Data-Konzepts, nach dem die Daten der Deutschen Bibliographie retrievalgerecht aufbereitet und eingegeben werden. Auf Eigenarten, Probleme und Mängel, die daraus entstehen, dass Biblio-Data auf nationalbibliographischen Daten aufbaut, wird ausführlich eingegangen. Zwei weitere Beiträge zeigen an einigen Beispielen die vielfältigen Suchmöglichkeiten mit Biblio-Data, um zu verdeutlichen, dass damit nicht nur viel schenellere, sondern auch bessere Recherchen ausgeführt werden können. Teil B weist nach, dass Biblio-Data weder die Innhaltsanalyse noch die Zuordnung von schlagwörtern automatisieren kann. Im derzeitigen Einsatzstadium fällt Biblio-Data die Aufgabe zu, die weiterhin knventionall-intellektuell auszuführende Sacherschließung durch retrospektive Recherchen, insbesonderr durch den wesentlich erleichterten Zugriff auf frühere Indexierungsergebnisse, zu unterstützen. Teil C schildert die praktische Arbeit mit Biblio-Data bei bibliographischen Ermittlungen und Literaturzusammenstellunen und kommt zu dem Ergebnis, dass effektive und bibliographische Arbeit aus der sinnvollen Kombination von Datenbank-Retrieval und konventioneller Suche bestehet.
-
ELINOR : Electronic Library Project (1998)
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- Abstract
- Describes the final phase of the work on the ELINOR (Electronic Library INformation Online Retrieval) project at De Montfort University, Leicester, which concluded in 1996. ELINOR was 2 phase project with 3 overall goals: to create a practical pilot system based on a commercial product (Excalibur EFS); to investigate the expansion of a small scale electronic library to a larger, distributed library system; and to develop a more efficient and effective means of accessing and sharing resources within a networked multi campus institution. ELINOR was successful in demonstrating that libraries may conveniently digitize and supply smal collections of high demand materials over a campus network in text anf TIFF format. Operational conditions have so far indicated that the barriers are not technological but involve copyright, use issues and sustainability
- Series
- British Library Research and Innovation Centre (BLRIC) report; 22
-
Modelle und Konzepte der Beitragsdokumentation und Filmarchivierung im Lokalfernsehsender Hamburg I : Endbericht (1996)
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- Date
- 22. 2.1997 19:46:30
-
McCormick, A.; Sutton, A.: Open learning and the Internet in public libraries (1998)
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- Abstract
- Presents the findings of the South Ayrshire Libraries OPen Learning and the Internet project, Sep 1997 to Oct 1998. The objective was to demonstrate how open learning materials available on the Internet could be integrated with the provision of local open learning resources to provide an enhanced learning environment in public libraries. The main areas of concentration within the project were information skills support to public library users and the provision of WWW based independent materials to learners. The organisation and retrieval of Web based resources for local use was a major issue throughout the project. Recommends the adoption of Dublin Core metadata standards, the connection of databases of resources with searchable wen pages, and the development of thesauri of terms used to index the Web based resources locally. Sstaff training, and the new skills which will need to be developed, were identified as issues. Cost was also identified as a related issue, extending to issues such as access to open learning material and the Internet
- Date
- 22. 5.1999 18:55:19
-
Freeman, R.R.: Research project for the evaluation of the UDC as the indexing language for a mechanized reference retrieval system : progress report for the period July 1, 1965 - Jan. 31, 1966 (1966)
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-
Siemer, J.A.: ¬An information retrieval expert system prototype for agricultural literature reference database-description and evaluation (1994)
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Siemer, J.A.: ¬A conceptual model for an information retrieval expert system prototype for agricultural bibliographic literature databases (1994)
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Siemer, J.A.: ¬A functional model for an information retrieval expert system for agricultural literature reference databases (1994)
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-
Siemer, J.A.: ¬The knowledge for a detailed conceptual model for an information retrieval expert system (1994)
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-
Doyle, L.B.: Indexing and abstracting by association : Part 1 (1962)
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- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.25-38
- Imprint
- Santa Monica, CA : System Development Corporation
-
Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990)
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- Content
- 1. Introduction // 2. Query modification through relevance feedback // 3. System design & description 4. Evaluation // 5. Analysis & results // 6. Conclusions and recommendations
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Wheelbarger, J.J.; Clouse, R.W.: ¬A comparision of a manual library reclassification project with a computer automated library reclassification project (1975)
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- Pages
- 22 S
-
Matthews, J.R.; Parker, M.R.: Local Area Networks and Wide Area Networks for libraries (1995)
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- Date
- 30.11.1995 20:53:22
-
Greengrass, M.: Conflation methods for searching databases of Latin text (1996)
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- Abstract
- Describes the results of a project to develop conflation tools for searching databases of Latin text. Reports on the results of a questionnaire sent to 64 users of Latin text retrieval systems. Describes a Latin stemming algorithm that uses a simple longest match with some recoding but differs from most stemmers in its use of 2 separate suffix dictionaries for processing query and database words. Describes a retrieval system in which a user inputs the principal component of their search term, these components are stemmed and the resulting stems matched against the noun based and verb based stem dictionaries. Evaluates the system, describing its limitations, and a more complex system
-
Beaulieu, M.; Payne, A.; Do, T.; Jones, S.: ENQUIRE Okapi project (1996)
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- Abstract
- The ENQUIRE project forms part of a series of investigations on query expansion in the Okapi experimental text retrieval system. A configurable user interface was implemented as an evaluative tool and tested in two locations on two different databases: the library catalogue of The London Business SChool and the computing section of INSPEC. The system offered a range of possible strategies based on thesaural terms for reformulating queries. These could be initiated automatically by the system or interactively with the user. The formative phase of the evaluation established the appropriateness and usability of the interface as well as users' perceptions of the underlying functionality. The aim of the large scale field trial was to determine to what extent user would select thesaural terms suggested by the system to reformulate queries, and to evaluate the effectiveness of a new dynamic form of query expansion implemented for this project
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Rudolph, S.; Hemmje, M.: Visualisierung von Thesauri zur interaktiven Unterstüzung von visuellen Anfragen an Textdatenbanken (1994)
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- Abstract
- In der folgenden Studie wird eine Komponente für eine visuelle Benutzerschnittstelle zu Textdatenbanken entworfen. Mit Hilfe einer Terminologievisualisierung wird dem Benutzer eine Hilfestellung bei der Relevanzbewertung von Dokumenten und bei der Erweiterung seiner visuellen Anfrage an das Retrieval-System gegeben. Dazu werden zuerst die grundlegenden Information-Retrieval-Modelle eingehender vorgestellt, d.h., generelle Retrieval-Modelle, Retrievaloperationen und spezielle Retrieval-Modelle wie Text-Retrieval werden erläutert. Die Funktionalität eines Text-Retrieval-Systems wird vorgestellt. Darüber hinaus werden bereits existierende Implementierungen visueller Information-Retrieval-Benutzerschnittstellen vorgestellt. Im weiteren Verlauf der Arbeit werden mögliche Visualisierungen der mit Hilfe eines Text-Retrieval-Systems gefundenen Dokumente aufgezeigt. Es werden mehrere Vorschläge zur Visualisierung von Thesauri diskutiert. Es wird gezeigt, wie neuronale Netze zur Kartierung eines Eingabebereiches benutzt werden können. Klassifikationsebenen einer objekt-orientierten Annäherung eines Information-Retrieval-Systems werden vorgestellt. In diesem Zusammenhang werden auch die Eigenschaften von Thesauri sowie die Architektur und Funktion eines Parsersystems erläutert. Mit diesen Voraussetzung wird die Implementierung einer visuellen Terminologierunterstützung realisiert. Abschließend wird ein Fazit zur vorgestellten Realisierung basierend auf einem Drei-Schichten-Modell von [Agosti et al. 1990] gezogen.
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Perkins, C.; Guest, P.: Operationalizing a sheet based cartographic information retrieval system (1993)
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-
Leung, C.H.C.; Hibler, J.N.D.: Architecture of a pictorial database management system (1991)
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- Abstract
- Addresses the problems of content retrieval in the construction of pictorial database management systems. Presents a generalisable architecture for the effective identification of specific pictures from a large collection and describes prototype system based on this architecture successfully implemented. The architecture consists of 3 main components: picture description; picture indexing and filing, and picture retrieval. The description of pictures is facilitated by using the main semantic concepts employed in the entity-attribute-relationship model. The chief function of the picture indexing and filing component is to convert the logical representations into a relational data format to prepare for subsequent processing initiated by picture queries
-
Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬A graphical interface for OKAPI : the design and evaluation of an online catalogue system with direct manipulation interaction for subject access (1994)
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- Abstract
- A project to design a graphical user interface for the OKAPI online catalogue search system which uses the basic term weighting probabilistic search engine. Presents a research context of the project with a discussion of interface and functionality issues relating to the design of OPACs. Describes the design methodology and evaluation methodology. Presents the preliminary results of the field trial evaluation. Considers problems encountered in the field trial and discusses contributory factors to the effectiveness of interactive query expansion. Highlights the tension between usability and functionality in highly interactive retrieval and suggests further areas of research
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
