Search (23 results, page 1 of 2)

  • × year_i:[1990 TO 2000}
  • × theme_ss:"Verbale Doksprachen im Online-Retrieval"
  1. Blair, D.C.: Language and representation in information retrieval (1991) 0.00 
    0.004289937 = product of:
  0.017159749 = sum of:
    0.017159749 = weight(_text_:information in 1545) [ClassicSimilarity], result of:
      0.017159749 = score(doc=1545,freq=26.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.2797255 = fieldWeight in 1545, product of:
          5.0990195 = tf(freq=26.0), with freq of:
            26.0 = termFreq=26.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.03125 = fieldNorm(doc=1545)
  0.25 = coord(1/4)
    Abstract
    Information or Document Retrieval is the subject of this book. It is not an introductory book, although it is self-contained in the sense that it is not necessary to have a background in the theory or practice of Information Retrieval in order to understand its arguments. The book presents, as clearly as possible, one particular perspective on Information Retrieval, and attempts to say that certain aspects of the theory or practice of the management of documents are more important than others. The majority of Information Retrieval research has been aimed at the more experimentally tractable small-scale systems, and although much of that work has added greatly to our understanding of Information Retrieval it is becoming increasingly apparent that retrieval systems with large data bases of documents are a fundamentally different genre of systems than small-scale systems. If this is so, which is the thesis of this book, then we must now study large information retrieval systems with the same rigor and intensity that we once studied small-scale systems. Hegel observed that the quantitative growth of any system caused qualitative changes to take place in its structure and processes.
    COMPASS
    Information retrieval
    LCSH
    Information Retrieval
    RSWK
    Information Retrieval
    Subject
    Information retrieval
    Information Retrieval
    Information Retrieval
  2. Piternick, A.B.: Vocabularies for online subject searching (1990) 0.00 
    0.004164351 = product of:
  0.016657405 = sum of:
    0.016657405 = weight(_text_:information in 1330) [ClassicSimilarity], result of:
      0.016657405 = score(doc=1330,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.27153665 = fieldWeight in 1330, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.109375 = fieldNorm(doc=1330)
  0.25 = coord(1/4)
    Source
    Encyclopedia of library and information science. Vol.45, [=Suppl.10]
  3. Zeng, L.: Achieving compatibility of indexing languages in online access environment (1992) 0.00 
    0.004164351 = product of:
  0.016657405 = sum of:
    0.016657405 = weight(_text_:information in 1284) [ClassicSimilarity], result of:
      0.016657405 = score(doc=1284,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.27153665 = fieldWeight in 1284, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.109375 = fieldNorm(doc=1284)
  0.25 = coord(1/4)
    Source
    Encyclopedia of library and information science. Vol.50, [=Suppl.13]
  4. Gomez, L.; Lochbaum, C.C.; Landauer, T.K.: All the right words: finding what you want as an function of richness of indexing vocabulary (1990) 0.00 
    0.0035694437 = product of:
  0.014277775 = sum of:
    0.014277775 = weight(_text_:information in 154) [ClassicSimilarity], result of:
      0.014277775 = score(doc=154,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.23274569 = fieldWeight in 154, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.09375 = fieldNorm(doc=154)
  0.25 = coord(1/4)
    Source
    Journal of the American Society for information Science. 41(1990) no.8, S.547-559
  5. Cochrane, P.A.: Indexing and searching thesauri, the Janus or Proteus of information retrieval (1992) 0.00 
    0.0035694437 = product of:
  0.014277775 = sum of:
    0.014277775 = weight(_text_:information in 2098) [ClassicSimilarity], result of:
      0.014277775 = score(doc=2098,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.23274569 = fieldWeight in 2098, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.09375 = fieldNorm(doc=2098)
  0.25 = coord(1/4)
  6. Informatics 10: prospects for intelligent retrieval : Proc. of a conference jointly sponsored by Aslib, the Aslib Informatics Group and the Information Retrieval Specialist Group of the British Computer Society, King's College, Cambridge, 21.-23.3.1989 (1990) 0.00 
    0.0029745363 = product of:
  0.011898145 = sum of:
    0.011898145 = weight(_text_:information in 2184) [ClassicSimilarity], result of:
      0.011898145 = score(doc=2184,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.19395474 = fieldWeight in 2184, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.078125 = fieldNorm(doc=2184)
  0.25 = coord(1/4)
  7. Milstead, J.L.: Thesauri in a full-text world (1998) 0.00 
    0.0029745363 = product of:
  0.011898145 = sum of:
    0.011898145 = weight(_text_:information in 2337) [ClassicSimilarity], result of:
      0.011898145 = score(doc=2337,freq=8.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.19395474 = fieldWeight in 2337, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2337)
  0.25 = coord(1/4)
    Abstract
    Despite early claims to the contemporary, thesauri continue to find use as access tools for information in the full-text environment. Their mode of use is changing, but this change actually represents an expansion rather than a contrdiction of their utility. Thesauri and similar vocabulary tools can complement full-text access by aiding users in focusing their searches, by supplementing the linguistic analysis of the text search engine, and even by serving as one of the tools used by the linguistic engine for its analysis. While human indexing contunues to be used for many databases, the trend is to increase the use of machine aids for this purpose. All machine-aided indexing (MAI) systems rely on thesauri as the basis for term selection. In the 21st century, the balance of effort between human and machine will change at both input and output, but thesauri will continue to play an important role for the foreseeable future
    Imprint
    Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
    Source
    Visualizing subject access for 21st century information resources: Papers presented at the 1997 Clinic on Library Applications of Data Processing, 2-4 Mar 1997, Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign. Ed.: P.A. Cochrane et al
  8. Aluri, R.D.; Kemp, A.; Boll, J.J.: Subject analysis in online catalogs (1991) 0.00 
    0.0029446408 = product of:
  0.011778563 = sum of:
    0.011778563 = weight(_text_:information in 863) [ClassicSimilarity], result of:
      0.011778563 = score(doc=863,freq=4.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.1920054 = fieldWeight in 863, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=863)
  0.25 = coord(1/4)
    LCSH
    Information retrieval
    Subject
    Information retrieval
  9. Drabenstott, K.M.; Weller, M.S.: ¬The exact-display approach for online catalog subject searching (1996) 0.00 
    0.0029446408 = product of:
  0.011778563 = sum of:
    0.011778563 = weight(_text_:information in 6930) [ClassicSimilarity], result of:
      0.011778563 = score(doc=6930,freq=4.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.1920054 = fieldWeight in 6930, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=6930)
  0.25 = coord(1/4)
    Abstract
    Introducess a new approach to display retrieved subject headings in subject searching designed to encourage users to browse bibliographic information. Emphasizes the importance of the exact display approach by showing how many user queries could be candidates for this approach, demonstrates an implementation of the exact-display approach in an experimental online catalogue. End user experiences gives opportunities to make recommendations for enhancing the original design of the exact display approach so that future implementations of this approach in operational online catalogues are responsive to the needs of online catalogue users
    Source
    Information processing and management. 32(1996) no.6, S.719-745
  10. Allen, B.: Improved browsable displays : an experimental test (1993) 0.00 
    0.0029446408 = product of:
  0.011778563 = sum of:
    0.011778563 = weight(_text_:information in 2775) [ClassicSimilarity], result of:
      0.011778563 = score(doc=2775,freq=4.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.1920054 = fieldWeight in 2775, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2775)
  0.25 = coord(1/4)
    Abstract
    Browse searching of online catalogs and electronic indexes is a popular means of retrieving information, but some subject heading lists are so extensive that browsing them can be difficult and time-consuming. This resaerch tested one way of presenting a browse interface to reduce the amount of scanning of subject headings required. It found that a hierarchical presentation of headings reduced the amount of scanning required by more than 50% without any reduction in the effectiveness of the search. Better browsable displays of this sort can improve the efficiency of searching but appear not to alter effectivenenss
    Source
    Information technology and libraries. 12(1993) no.2, S.203-208
  11. Drabenstott, K.M.; Vizine-Goetz, D.: Using subject headings for online retrieval : theory, practice and potential (1994) 0.00 
    0.0025239778 = product of:
  0.010095911 = sum of:
    0.010095911 = weight(_text_:information in 386) [ClassicSimilarity], result of:
      0.010095911 = score(doc=386,freq=4.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.16457605 = fieldWeight in 386, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=386)
  0.25 = coord(1/4)
    Abstract
    Using subject headings for Online Retrieval is an indispensable tool for online system desingners who are developing new systems or refining exicting ones. The book describes subject analysis and subject searching in online catalogs, including the limitations of retrieval, and demonstrates how such limitations can be overcome through system design and programming. The book describes the Library of Congress Subject headings system and system characteristics, shows how information is stored in machine readable files, and offers examples of and recommendations for successful methods. Tables are included to support these recommendations, and diagrams, graphs, and bar charts are used to provide results of data analyses.
    Footnote
    Rez. in: Information processing and management 31(1995) no.3, S.450-451 (R.R. Larson); Library resources and technical services 41(1997) no.1, S.60-67 (B.H. Weinberg)
  12. Bodoff, D.; Kambil, A.: Partial coordination : II. A preliminary evaluation and failure analysis (1998) 0.00 
    0.0025239778 = product of:
  0.010095911 = sum of:
    0.010095911 = weight(_text_:information in 2323) [ClassicSimilarity], result of:
      0.010095911 = score(doc=2323,freq=4.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.16457605 = fieldWeight in 2323, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=2323)
  0.25 = coord(1/4)
    Abstract
    Partial coordination is a new method for cataloging documents for subject access. It is especially designed to enhance the precision of document searches in online environments. This article reports a preliminary evaluation of partial coordination that shows promising results compared with full-text retrieval. We also report the difficulties in empirically evaluating the effectiveness of automatic full-text retrieval in contrast to mixed methods such as partial coordination which combine human cataloging with computerized retrieval. Based on our study, we propose research in this area will substantially benefit from a common framework for failure analysis and a common data set. This will allow information retrieval researchers adapting 'library style'cataloging to large electronic document collections, as well as those developing automated or mixed methods, to directly compare their proposals for indexing and retrieval. This article concludes by suggesting guidelines for constructing such as testbed
    Source
    Journal of the American Society for Information Science. 49(1998) no.14, S.1270-1282
  13. Takeda, N.: Problems in hierarchical structures in thesauri : their influences on the results of information retrieval (1994) 0.00 
    0.002379629 = product of:
  0.009518516 = sum of:
    0.009518516 = weight(_text_:information in 2642) [ClassicSimilarity], result of:
      0.009518516 = score(doc=2642,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.1551638 = fieldWeight in 2642, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=2642)
  0.25 = coord(1/4)
  14. Meikle, D.: Syndetic structure and OPACs : a literature review (1995) 0.00 
    0.002379629 = product of:
  0.009518516 = sum of:
    0.009518516 = weight(_text_:information in 3349) [ClassicSimilarity], result of:
      0.009518516 = score(doc=3349,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.1551638 = fieldWeight in 3349, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=3349)
  0.25 = coord(1/4)
    Abstract
    Attempts to gauge whether syndetic structure, the cross reference system long regarded as an integral component of the controlled vocabulary which predominates as the indexing framework for online subject searching, still has a role to play in assisting end users in their information quests. To this end, examines a number of existing and proposed enhancements to OPACs by means of a literatur review. These include: Boolean and keyword searching; online browsing; artificial intelligence; classification clustering; and hypertext. Discusses Dervin's sensemaking theories and methodologies
  15. Bisig, U.: OPAC und verbale Sacherschließung : ein Beitrag zur RSWK-Diskussion (1994) 0.00 
    0.002379629 = product of:
  0.009518516 = sum of:
    0.009518516 = weight(_text_:information in 4322) [ClassicSimilarity], result of:
      0.009518516 = score(doc=4322,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.1551638 = fieldWeight in 4322, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=4322)
  0.25 = coord(1/4)
    Abstract
    In der vorliegenden Form können die RSWK nicht befriedigen. Die geforderte hochdifferenzierte Erschließung ist in einem OPAC wegen der vielfältigen Abfragemöglichkeiten gar nicht nötig, ja eine einheitliche Indexierung und effiziente Suche is aufgrund der komplexen Regeln sogar erschwert. Aufgaben und Probleme der verbalen Sacherschließung in OPACs werden in dieser Arbeit aufgezeigt und Ansätze zu einer Alternative diskutiert. Der traditionelle Indexkatalog hat als Ergänzung des modernen Information Retrieval nur eine Zukunft, wenn die Möglichkeiten der EDV und der Faktor Mensch bei der Regelwerkentwicklung besser berücksichtigt werden
  16. Ralston, N.M.: Controlled vocabularies for MEDLARS databases (1995) 0.00 
    0.0020821756 = product of:
  0.008328702 = sum of:
    0.008328702 = weight(_text_:information in 2640) [ClassicSimilarity], result of:
      0.008328702 = score(doc=2640,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.13576832 = fieldWeight in 2640, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2640)
  0.25 = coord(1/4)
    Abstract
    For many years, searching medical and health-related topics has caused thousands of searchers to consult the well-known Medical Subject Headings (MeSH) controlled vocabulary. This plan works well for searching MEDLINE, but what about the MEDLARS databases such as TOXLIT, BIOETHICSLINE and POPLINE? Several printed vocabularies are available for searchers who wish to benefit from the consistency afforded by consulting established term lists. Occasionally, use of keywords from vocabularies other than MeSH is recommended even when information in the database is also indexed to MeSH. Search techniques available for use with several of the controlled vocabularies which are discussed vary, but built-in consistency of term use is a continuing theme from one controlled vocabulary to another
  17. Voorbij, H.: ¬Een goede titel behoeft geen trefwoord, of toch wel? : een vergelijkend oderzoek titelwoorden - trefwoorden (1997) 0.00 
    0.0020821756 = product of:
  0.008328702 = sum of:
    0.008328702 = weight(_text_:information in 1446) [ClassicSimilarity], result of:
      0.008328702 = score(doc=1446,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.13576832 = fieldWeight in 1446, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1446)
  0.25 = coord(1/4)
    Abstract
    A recent survey at the Royal Library in the Netherlands showed that subject headings are more efficient than title keywords for retrieval purposes. 475 Dutch publications were selected at random and assigned subject headings. The study showed that subject headings provided additional useful information in 56% of titles. Subsequent searching of the library's online catalogue showed that 88% of titles were retrieved via subject headings against 57% through title keywords. Further precision may be achieved with the help of indexing staff, but at considerable cost
  18. Studwell, W.E.: Of eggs and baskets : getting more access out of LC Subject Headings in an online environment (1991) 0.00 
    0.0020821756 = product of:
  0.008328702 = sum of:
    0.008328702 = weight(_text_:information in 515) [ClassicSimilarity], result of:
      0.008328702 = score(doc=515,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.13576832 = fieldWeight in 515, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=515)
  0.25 = coord(1/4)
    Footnote
    Simultaneously published as Enhancing Access to Information: Designing Catalogs for the 21st Century
  19. Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992) 0.00 
    0.0017847219 = product of:
  0.0071388874 = sum of:
    0.0071388874 = weight(_text_:information in 2230) [ClassicSimilarity], result of:
      0.0071388874 = score(doc=2230,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.116372846 = fieldWeight in 2230, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=2230)
  0.25 = coord(1/4)
    Abstract
    Experimental evidence suggests that enhancing the subject content of OPAC records can improve retrieval performance. This is based on the use of natural language index terms derived from the table of contents and back-of-the-book index of documents. The research reported here investigates the alternative approach of translating these natural language terms into controlled vocabulary. Subject queries were collected by interview at the catalogue, and indexing of the queries demonstrated the impressive ability of PRECIS, and to a lesser extent LCSH, to represent users' information needs. DDC performed poorly in this respect. The assumption was made that an index language adequately specific to represent users' queries should be adequate to represent document contents. Searches were carried out on three test databases, and both natural language and PRECIS enhancement of MARC records increased the number of relevant documents found, with PRECIS showing the better performance. However, with weak stemming the advantage of PRECIS was lost. Consideration must also be given to the potential advantages of controlled vocabulary, over and above basic retrieval performance measures
  20. McJunkin, M.C.: Precision and recall in title keyword searching (1995) 0.00 
    0.0017847219 = product of:
  0.0071388874 = sum of:
    0.0071388874 = weight(_text_:information in 3351) [ClassicSimilarity], result of:
      0.0071388874 = score(doc=3351,freq=2.0), product of:
        0.06134496 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.034944877 = queryNorm
        0.116372846 = fieldWeight in 3351, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=3351)
  0.25 = coord(1/4)
    Source
    Information technology and libraries. 14(1995) no.3, S.161-171

Authors

Languages

  • e 20
  • d 1
  • ja 1
  • nl 1
  • More… Less…

Types

Themes

Subjects

Classifications