Search (76 results, page 1 of 4)

  • × theme_ss:"Automatisches Indexieren"
  • × type_ss:"a"
  • × year_i:[1990 TO 2000}
  1. Milstead, J.L.: Thesauri in a full-text world (1998) 0.07 
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    Date
    22. 9.1997 19:16:05
    Theme
    Verbale Doksprachen im Online-Retrieval
  2. Gödert, W.; Lepsky, K.: Semantische Umfeldsuche im Information Retrieval (1998) 0.06 
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    Abstract
    Sachliche Suchen in bibliothekarischen Online-Katalogen enden häufig mit unbefriedigenden Ergebnissen. Als eine Ursache dafür kann angesehen werden, daß die Gestaltung des Suchprozesses das semantische Umfeld einer Suchanfrage nicht mit einbezieht, daß in Übertragung der Verhältnisse in konventionellen Katalogen am Paradigma des Wort-Matching zwischen Suchwort und Indexat festgehalten wird. Es wird statt dessen das Konzept einer semantischen Umfeldsuche entwickelt und gezeigt, welche Rolle die Verwendung strukturierten Vokabulars dafür spielen kann. Insbesondere wird dargestellt, welche Möglichkeiten Verfahren der wörterbuchgestützten maschinellen Indexierung in diesem Zusammenhang spielen können. Die Ausführungen werden durch Beispiele illustriert
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  3. Lück, W.; Rittberger, W.; Schwantner, M.: ¬Der Einsatz des Automatischen Indexierungs- und Retrievalsystems (AIR) im Fachinformationszentrum Karlsruhe (1994) 0.05 
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    Footnote
    Wiederabdruck aus: Experimentelles und praktisches Information Retrieval. Hrsg.: R. Kuhlen. Konstanz: Universitätsverlag 1992
    Source
    Verbale Sacherschließung im Südwestdeutschen Bibliotheksverbund (SWB): Fortbildungskurs 1993 für Bibliothekare an den wissenschaftlichen Bibliotheken des Landes Baden-Württemberg vom 8. bis 12. November 1993 in Oberwolfach. Hrsg.: K. Franken
  4. Micco, M.; Popp, R.: Improving library subject access (ILSA) : a theory of clustering based in classification (1994) 0.05 
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    Theme
    Klassifikationssysteme im Online-Retrieval
  5. Knorz, G.: Automatische Indexierung (1994) 0.05 
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    Series
    Berufsbegleitendes Ergänzungsstudium im Tätigkeitsfeld wissenschaftliche Information und Dokumentation (BETID): Lehrmaterialien; Nr.3
    Source
    Wissensrepräsentation und Information Retrieval. R.-D. Hennings u.a
  6. Tzeras, K.: Zur Aufwandsabschätzung bei der Entwicklung eines Indexierungswörterbuches (1991) 0.03 
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    Abstract
    Für die automatische Indexierung mit einem vorgegebenen Deskriptorensystem wird ein Wörterbuch benötigt, das möglichst viele Fachausdrücke des Anwendungsgebietes durch Relationen mit Deskriptoren verbindet. Werden die in einem solchen Indexierungswörterbuch erfaßten Relationen aus der Verarbeitung von Texten gewonnen, so ergibt sich eine Beziehung zwischen der Anzahl der Texte und der Größe und Leistungsfähigkeit des Wörterbuches. Die beschreibung derartiger Beziehungen ist besonders vor Beginn der Entwicklung eines automatischen Indexierungssystems von großem Interesse. H. Hüther hat sich in mehreren Arbeiten mit diesem Problem beschäftigt und verschiedene Schätzverfahren theoretische hergeleitet. Für eines der von ihm vorgeschlagenen Schätzverfahren zur Abschätzung der Größe eines Indexierungswörterbuches in Abhängigkeit von der Anzahl der zugrundeliegenden Texte werden im vorliegenden beitrag die Leistungsfähigkeit und die Anwendbarkeit untersucht
    Source
    Information retrieval: GI/GMD-Workshop, Darmstadt, 23.-24.6.1991: Proceedings. Ed.: N. Fuhr
  7. Volk, M.; Mittermaier, H.; Schurig, A.; Biedassek, T.: Halbautomatische Volltextanalyse, Datenbankaufbau und Document Retrieval (1992) 0.03 
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    Abstract
    In diesem Aufsatz beschreiben wir ein System zur Analyse von Kurzartikeln. Das System arbeitet halbautomatisch. Das heißt, zunächst wird der Artikel vom System analysiert und dann dem benutzer zur Nachberarbeitung vorgelegt. Die so gewonnene Information wird in einem Datenbankeintrag abgelegt. Über die Datenbank - in dBase IV implementiert - sind dann Abfragen und Zugriffe auf die Originaltexte effizient möglich. Der Kern dieses Aufsatzes betrifft die halbautomatische Analyse. Wir beschreiben unser Verfahren für parametrisiertes Pattern Matching sowie linguistische Heuristiken zur Ermittlung von Nominalphrasen und Präpositionalphrasen. Das System wurde für den praktischen Einsatz im Bonner Büro des 'Forums InformatikerInnen Für Frieden und gesellschaftliche Verantwortung e.V. (FIFF)' entwickelt
  8. Lepsky, K.: Automatische Indexierung und bibliothekarische Inhaltserschließung : Ergebnisse des DFG-Projekts MILOS I (1996) 0.02 
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    Abstract
    Kooperative Katalogisierung in der Bibliotheksverbünden und steigende Zahlen retrokonvertierter Altdaten füfhren zu einem stetigen Anwachsen maschinenlesbar verfügbarer Titeldaten. Dieser Entewicklung aud ser Katalogisat- bzw. Datenseite entspricht eine ähnlich rasante Entwicklung auf der Seite der Zugangsmöglichkeiten, den Online-Publikumskatalogen. Immer mehr Katalogdaten von immer mehr Bibliotheken sind in immer mehr OPACs nachgewiesen. Mit dieser auch durch neue Zugriffsformen (Internet) verbesserten Verfügbarkeit hält die bibliothekarische Sacherschließung längst nicht mehr Schritt. In diesem Beitrag werden die Vorgehensweise und Ergebnisse des Projektes MILOS I vorgestellt, das an der Universitäts- und Landesbibliothek zur automatischen Indexierung bibliothekarischer Titeldaten und zur Anreicherung von Katalogdaten durchgeführt wurde.
    Source
    Zukunft der Sacherschließung im OPAC: Vorträge des 2. Düsseldorfer OPAC-Kolloquiums am 21. Juni 1995. Hrsg.: E. Niggemann u. K. Lepsky
  9. Pritchard-Schoch, T.: Natural language comes of age (1993) 0.02 
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    Abstract
    Discusses natural languages and the natural language implementations of Westlaw's full-text legal documents, Westlaw Is Natural. Natural language is not aritificial intelligence but a hybrid of linguistics, mathematics and statistics. Provides 3 classes of retrieval models. Explains how Westlaw processes an English query. Assesses WIN. Covers WIN enhancements; the natural language features of Congressional Quarterly's Washington Alert using a document for a query; the personal librarian front end search software and Dowquest from Dow Jones news/retrieval. Conmsiders whether natural language encourages fuzzy thinking and whether Boolean logic will still be needed
    Source
    Online. 17(1993) no.3, S.33-43
  10. Bordoni, L.; Pazienza, M.T.: Documents automatic indexing in an environmental domain (1997) 0.02 
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    Abstract
    Describes an application of Natural Language Processing (NLP) techniques, in HIRMA (Hypertextual Information Retrieval Managed by ARIOSTO), to the problem of document indexing by referring to a system which incorporates natural language processing techniques to determine the subject of the text of documents and to associate them with relevant semantic indexes. Describes briefly the overall system, details of its implementation on a corpus of scientific abstracts related to environmental topics and experimental evidence of the system's behaviour. Analyzes in detail an experiment designed to evaluate the system's retrieval ability in terms of recall and precision
    Source
    International forum on information and documentation. 22(1997) no.1, S.17-28
  11. Lepsky, K.: Maschinelles Indexieren zur Verbesserung der sachlichen Suche im OPAC : DFG-Projekt an der Universitäts- und Landesbibliothek Düsseldorf (1994) 0.02 
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  12. Dow Jones unveils knowledge indexing system (1997) 0.02 
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    Abstract
    Dow Jones Interactive Publishing has developed a sophisticated automatic knowledge indexing system that will allow searchers of the Dow Jones News / Retrieval service to get highly targeted results from a search in the service's Publications Library. Instead of relying on a thesaurus of company names, the new system uses a combination of that basic algorithm plus unique rules based on the editorial styles of individual publications in the Library. Dow Jones have also announced its acceptance of the definitions of 'selected full text' and 'full text' from Bibliodata's Fulltext Sources Online directory
  13. Schäuble, P.: Kostengünstige Konversion großer Bibliothekskataloge (1996) 0.02 
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    Content
    Kurzbericht über eine Konversion von Katalogkarten mit Automatischer Indexierung und grafischer Abbildung der Katalogkarten im Retrievalsystem
  14. Wacholder, N.; Byrd, R.J.: Retrieving information from full text using linguistic knowledge (1994) 0.02 
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    Abstract
    Examines how techniques in the field of natural language processing can be applied to the analysis of text in information retrieval. State of the art text searching programs cannot distinguish, for example, between occurrences of the sickness, AIDS and aids as tool or between library school and school nor equate such terms as online or on-line which are variants of the same form. To make these distinction, systems must incorporate knowledge about the meaning of words in context. Research in natural language processing has concentrated on the automatic 'understanding' of language; how to analyze the grammatical structure and meaning of text. Although many asoects of this research remain experimental, describes how these techniques to recognize spelling variants, names, acronyms, and abbreviations
    Source
    Proceedings of the 15th National Online Meeting 1994, New York, 10-12 May 1994. Ed. by M.E. Williams
  15. MacDougall, S.: Rethinking indexing : the impact of the Internet (1996) 0.02 
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    Abstract
    Considers the challenge to professional indexers posed by the Internet. Indexing and searching on the Internet appears to have a retrograde step, as well developed and efficient information retrieval techniques have been replaced by cruder techniques, involving automatic keyword indexing and frequency ranking, leading to large retrieval sets and low precision. This is made worse by the apparent acceptance of this poor perfromance by Internet users and the feeling, on the part of indexers, that they are being bypassed by the producers of these hyperlinked menus and search engines. Key issues are: how far 'human' indexing will still be required in the Internet environment; how indexing techniques will have to change to stay relevant; and the future role of indexers. The challenge facing indexers is to adapt their skills to suit the online environment and to convince publishers of the need for efficient indexes on the Internet
  16. Lepsky, K.; Siepmann, J.; Zimmermann, A.: Automatische Indexierung für Online-Kataloge : Ergebnisse eines Retrievaltests (1996) 0.02 
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    Abstract
    Examines the effectiveness of automated indexing and presents the results of a study of information retrieval from a segment (40.000 items) of the ULB Düsseldorf database. The segment was selected randomly and all the documents included were indexed automatically. The search topics included 50 subject areas ranging from economic growth to alternative energy sources. While there were 876 relevant documents in the database segment for each of the 50 search topics, the recall ranged from 1 to 244 references, with the average being 17.52 documents per topic. Therefore it seems that, in the immediate future, automatic indexing should be used in combination with intellectual indexing
  17. Junger, U.; Müller-Dreier, A.: Bericht über den Workshop 'Perspektiven der Sacherschließung im GBV' am 12. März 1998 in der TIB Hannover (1999) 0.02 
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  18. Hüther, H.: Selix im DFG-Projekt Kascade (1998) 0.02 
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  19. Plaunt, C.; Norgard, B.A.: ¬An association-based method for automatic indexing with a controlled vocabulary (1998) 0.01 
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    Abstract
    In this article, we describe and test a two-stage algorithm based on a lexical collocation technique which maps from the lexical clues contained in a document representation into a controlled vocabulary list of subject headings. Using a collection of 4.626 INSPEC documents, we create a 'dictionary' of associations between the lexical items contained in the titles, authors, and abstracts, and controlled vocabulary subject headings assigned to those records by human indexers using a likelihood ratio statistic as the measure of association. In the deployment stage, we use the dictiony to predict which of the controlled vocabulary subject headings best describe new documents when they are presented to the system. Our evaluation of this algorithm, in which we compare the automatically assigned subject headings to the subject headings assigned to the test documents by human catalogers, shows that we can obtain results comparable to, and consistent with, human cataloging. In effect we have cast this as a classic partial match information retrieval problem. We consider the problem to be one of 'retrieving' (or assigning) the most probably 'relevant' (or correct) controlled vocabulary subject headings to a document based on the clues contained in that document
    Date
    11. 9.2000 19:53:22
  20. Lepsky, K.: Automatische Indexierung zur Erschließung deutschsprachiger Dokumente (1999) 0.01 
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    Abstract
    Der Beitrag beschäftigt sich mit der Anwendung eines Verfahrens zur automatischen Indexierung deutschsprachiger Texte in Bibliotheken. Die Arbeitsweise des Verfahrens und seine Entwicklung innerhalb der von der Deutschen Forschungsgemeinschaft geförderte und an der ULB Düsseldorf gemeinsam mit der Fachrichtung Informationswissenschaft der Universität des Saarlandes durchgeführten Projekte MILOS I, MILOS II und KASCADE werden geschildert. Die Ergebnisse von Retrievaltests belegen die Tauglichkeit des Verfahrens für den Einsatz in Bibliotheken. Aufsetzend auf diesen Ergebnissen werden Perspektiven für die bibliothekarische Sacherschließung im Hinblick auf den Einsatz von automatischen Verfahren entworfen

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