Search (14 results, page 1 of 1)

  • × year_i:[1980 TO 1990}
  • × theme_ss:"Volltextretrieval"
  1. Huschens, C.: Freitextindexierung in der Parlamentsdokumentation (1986) 0.02 
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    Source
    Deutscher Dokumentartag 1986, Freiburg, 8.-10.10.1986: Bedarfsorientierte Fachinformation: Methoden und Techniken am Arbeitsplatz. Bearb.: H. Strohl-Goebel
  2. Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989) 0.01 
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    Abstract
    Searches conducted as part of the MEDLINE/Full-Text Research Project revealed that the full-text data bases of clinical medical journal articles (CCML (Comprehensive Core Medical Library) from BRS Information Technologies, and MEDIS from Mead Data Central) did not retrieve all the relevant citations. An analysis of the data indicated that 204 relevant citations were retrieved only by MEDLINE. A comparison of the strategies used on the full-text data bases with the text of the articles of these 204 citations revealed that 2 reasons contributed to these failure. The searcher often constructed a restrictive strategy which resulted in the loss of relevant documents; and as in other kinds of retrieval, the problems of natural language caused the loss of relevant documents.
    Date
    9. 1.1996 10:22:31
  3. Schwarz, C.: Freitextrecherche: Grenzen und Möglichkeiten (1982) 0.01 
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  4. Maag, D.: Leistungsmerkmale von Volltextretrievalsystemen : Anforderungen an die künftige Weiterentwicklung (1989) 0.01 
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    Imprint
    Darmstadt : Fachhochschule, Fachbereich Information und Dokumentation
  5. Ashford, J.H.; Matkin, D.I.: Studies in the application of free text package systems for information storage and retrieval in libraries and related information centres (1982) 0.00 
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    Series
    Case studies in library automation; no.1
  6. Free text in information systems: capabilities and limitations (1985) 0.00 
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    Footnote
    Diese Empfehlungen liegen auch in deutscher Übersetzung vor (abgedruckt ebenfalls in International classification), leider ist die Übersetzung nicht in allen Aussagen recht gelungen, so daß das Original vorzuziehen ist
  7. Freitext in Informationssystemen (1985) 0.00 
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    Footnote
    Deutsche Fassung von 'Free text in information systems' in: International classification 12(1985) H.2, S.95-98. Wegen einiger Ungereimtheiten sollte die englische Fassung benutzt werden
  8. Dubois, C.P.R.: Free text vs. controlled vocabulary; a reassessment (1987) 0.00 
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    Abstract
    Free text and controlled vocabulary searching can no longer be viewed as antagonistic techniques in information retrieval since they both display advantages and weaknesses dependent on a fairly wide range of context, with the option to use both increasingly favoured. An attempt is made to present a list of features associated with the two techniques and to suggest a methodology to assist in deciding on the optimal retrieval technique for a particular purpose. The relevance of the techniques in expert systems and full text contexts is also discussed. Finally, recommendations for further research are suggested, concentrating on survey techniques in real-life retrieval situations
  9. Wenzel, F.: Semantische Eingrenzung im Freitext-Retrieval auf der Basis morphologischer Segmentierungen (1980) 0.00 
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    Abstract
    The basic problem in freetext retrieval is that the retrieval language is not properly adapted to that of the author. Morphological segmentation, where words with the same root are grouped together in the inverted file, is a good eliminator of noise and information loss, providing high recall but low precision
  10. Markey, K.; Atherton, P.; Newton, C.: ¬An analysis of controlled vocabulary and free text search statements in online searches (1980) 0.00 
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  11. Umstätter, W.: Freitext oder kontrolliertes Vokabular : was ist besser? (1983) 0.00 
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    Source
    5. Frühjahrstagung der DGD in Neu-Isenburg vom 26.-28. April 1983: Vorträge
  12. Böhle, K.; Riehm, U.: German fulltexts in working contexts : empirical findings on how end-users make use of fulltext databases (1989) 0.00 
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    Abstract
    Reports the result of a brief review of West German full text data bases and a user survey of over 40 users in the fields of medicine, law and economics. Questions common assumptions about the advantages and disadvantages of full text data bases.
  13. Blair, D.C.: Full text retrieval : Evaluation and implications (1986) 0.00 
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    Abstract
    Recently, a detailed evaluation of a large, operational full-text document retrieval system was reported in the literature. Values of precision and recall were estimated usind traditional statistical sampling methods and blind evaluation procedures. The results of this evaluation demonstrated that the system tested was retrieving less then 20% of the relevant documents when the searchers believed it was retrieving over 75% of the relevant documents. This evaluation is described including some data not reported in the original article. Also discussed are the implications which this study has for how the subjects of documents should be represented, as well as the importance of rigorous retrieval evaluations for the furtherhance of information retrieval research
  14. Cochrane, P.A.: Subject access - free text and controlled : the case of Papua New Guinea (1985) 0.00 
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    Abstract
    The online catalogue can provide the user with efficient and effective access through a variety of access points. New interests in subject heading is indicated. Keyword access and free text searching are considered alternatice methods. An investigation is suggested into the symbiotic relationship between classification and subject heading

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