Search (20 results, page 1 of 1)

  • × theme_ss:"Retrievalstudien"
  • × year_i:[1980 TO 1990}
  1. Jochum, F.; Weissmann, V.: Struktur und Elemente des Information Retrieval Experiments (1985) 0.01 
    0.0083446475 = product of:
  0.045895558 = sum of:
    0.010768246 = product of:
      0.032304738 = sum of:
        0.032304738 = weight(_text_:f in 114) [ClassicSimilarity], result of:
          0.032304738 = score(doc=114,freq=2.0), product of:
            0.09169745 = queryWeight, product of:
              3.985786 = idf(docFreq=2232, maxDocs=44218)
              0.023006115 = queryNorm
            0.35229704 = fieldWeight in 114, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.985786 = idf(docFreq=2232, maxDocs=44218)
              0.0625 = fieldNorm(doc=114)
      0.33333334 = coord(1/3)
    0.035127312 = weight(_text_:frankfurt in 114) [ClassicSimilarity], result of:
      0.035127312 = score(doc=114,freq=2.0), product of:
        0.09561953 = queryWeight, product of:
          4.1562657 = idf(docFreq=1882, maxDocs=44218)
          0.023006115 = queryNorm
        0.36736545 = fieldWeight in 114, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.1562657 = idf(docFreq=1882, maxDocs=44218)
          0.0625 = fieldNorm(doc=114)
  0.18181819 = coord(2/11)
    Imprint
    Frankfurt : Indeks
  2. Dillon, M.: Enhanced bibliographic record retrieval experiments (1989) 0.00 
    0.0046407795 = product of:
  0.051048573 = sum of:
    0.051048573 = product of:
      0.15314572 = sum of:
        0.15314572 = weight(_text_:1989 in 1406) [ClassicSimilarity], result of:
          0.15314572 = score(doc=1406,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            1.3640437 = fieldWeight in 1406, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.125 = fieldNorm(doc=1406)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    OCLC newsletter. 1989, no.181, S.13-14
    Year
    1989
  3. Ongering, H.; Riesthuis, G.J.A.: ¬De ontsluiting in het ADION-systeem : precision en recall (1989) 0.00 
    0.0046407795 = product of:
  0.051048573 = sum of:
    0.051048573 = product of:
      0.15314572 = sum of:
        0.15314572 = weight(_text_:1989 in 416) [ClassicSimilarity], result of:
          0.15314572 = score(doc=416,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            1.3640437 = fieldWeight in 416, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.125 = fieldNorm(doc=416)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Open. 21(1989) nos.7/8, S.261-264
    Year
    1989
  4. Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983) 0.00 
    0.0043364265 = product of:
  0.023850344 = sum of:
    0.013460308 = product of:
      0.040380925 = sum of:
        0.040380925 = weight(_text_:f in 2417) [ClassicSimilarity], result of:
          0.040380925 = score(doc=2417,freq=2.0), product of:
            0.09169745 = queryWeight, product of:
              3.985786 = idf(docFreq=2232, maxDocs=44218)
              0.023006115 = queryNorm
            0.4403713 = fieldWeight in 2417, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.985786 = idf(docFreq=2232, maxDocs=44218)
              0.078125 = fieldNorm(doc=2417)
      0.33333334 = coord(1/3)
    0.010390037 = product of:
      0.03117011 = sum of:
        0.03117011 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
          0.03117011 = score(doc=2417,freq=2.0), product of:
            0.08056349 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.023006115 = queryNorm
            0.38690117 = fieldWeight in 2417, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=2417)
      0.33333334 = coord(1/3)
  0.18181819 = coord(2/11)
    Pages
    S.22-25
    Source
    Productivity in the information age : proceedings of the 46th ASIS annual meeting, 1983. Ed.: Raymond F Vondra
  5. Croft, W.B.; Thompson, R.H.: Support for browsing in an intelligent text retrieval system (1989) 0.00 
    0.004060682 = product of:
  0.044667497 = sum of:
    0.044667497 = product of:
      0.13400249 = sum of:
        0.13400249 = weight(_text_:1989 in 5004) [ClassicSimilarity], result of:
          0.13400249 = score(doc=5004,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            1.1935382 = fieldWeight in 5004, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.109375 = fieldNorm(doc=5004)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    International journal of man-machine studies. 30(1989), S.639-668
    Year
    1989
  6. Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989) 0.00 
    0.0038295079 = product of:
  0.021062292 = sum of:
    0.014828271 = product of:
      0.044484813 = sum of:
        0.044484813 = weight(_text_:1989 in 3564) [ClassicSimilarity], result of:
          0.044484813 = score(doc=3564,freq=3.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.3962189 = fieldWeight in 3564, product of:
              1.7320508 = tf(freq=3.0), with freq of:
                3.0 = termFreq=3.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.046875 = fieldNorm(doc=3564)
      0.33333334 = coord(1/3)
    0.006234022 = product of:
      0.018702066 = sum of:
        0.018702066 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
          0.018702066 = score(doc=3564,freq=2.0), product of:
            0.08056349 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.023006115 = queryNorm
            0.23214069 = fieldWeight in 3564, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=3564)
      0.33333334 = coord(1/3)
  0.18181819 = coord(2/11)
    Date
    9. 1.1996 10:22:31
    Year
    1989
  7. Kilgour, F.G.: Retrieval on information from computerized book texts (1989) 0.00 
    0.0026960494 = product of:
  0.029656542 = sum of:
    0.029656542 = product of:
      0.088969626 = sum of:
        0.088969626 = weight(_text_:1989 in 2965) [ClassicSimilarity], result of:
          0.088969626 = score(doc=2965,freq=3.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.7924378 = fieldWeight in 2965, product of:
              1.7320508 = tf(freq=3.0), with freq of:
                3.0 = termFreq=3.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.09375 = fieldNorm(doc=2965)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Year
    1989
  8. Biebricher, P.; Fuhr, N.; Niewelt, B.: ¬Der AIR-Retrievaltest (1986) 0.00 
    0.0026846211 = product of:
  0.029530833 = sum of:
    0.029530833 = weight(_text_:den in 4040) [ClassicSimilarity], result of:
      0.029530833 = score(doc=4040,freq=4.0), product of:
        0.06594008 = queryWeight, product of:
          2.866198 = idf(docFreq=6840, maxDocs=44218)
          0.023006115 = queryNorm
        0.44784343 = fieldWeight in 4040, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          2.866198 = idf(docFreq=6840, maxDocs=44218)
          0.078125 = fieldNorm(doc=4040)
  0.09090909 = coord(1/11)
    Abstract
    Der Beitrag enthält eine Darstellung zur Durchführung und zu den Ergebnissen des Retrievaltests zum AIR/PHYS-Projekt. Er zählt mit seinen 309 Fragen und 15.000 Dokumenten zu den größten Retrievaltests, die bisher zur Evaluierung automatisierter Indexierungs- oder Retrievalverfahren vorgenommen wurden.
  9. Feng, S.: ¬A comparative study of indexing languages in single and multidatabase searching (1989) 0.00 
    0.0023203897 = product of:
  0.025524287 = sum of:
    0.025524287 = product of:
      0.07657286 = sum of:
        0.07657286 = weight(_text_:1989 in 2494) [ClassicSimilarity], result of:
          0.07657286 = score(doc=2494,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.68202186 = fieldWeight in 2494, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.0625 = fieldNorm(doc=2494)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Canadian Journal of Information Science. 14(1989) no.2, S.26-46
    Year
    1989
  10. Prasher, R.G.: Evaluation of indexing system (1989) 0.00 
    0.0023203897 = product of:
  0.025524287 = sum of:
    0.025524287 = product of:
      0.07657286 = sum of:
        0.07657286 = weight(_text_:1989 in 4998) [ClassicSimilarity], result of:
          0.07657286 = score(doc=4998,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.68202186 = fieldWeight in 4998, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.0625 = fieldNorm(doc=4998)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Herald of library science. 28(1989) no.3, S.157-65
    Year
    1989
  11. Pao, M.L.: Retrieval differences between term and citation indexing (1989) 0.00 
    0.0017973663 = product of:
  0.019771028 = sum of:
    0.019771028 = product of:
      0.059313085 = sum of:
        0.059313085 = weight(_text_:1989 in 3566) [ClassicSimilarity], result of:
          0.059313085 = score(doc=3566,freq=3.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.5282919 = fieldWeight in 3566, product of:
              1.7320508 = tf(freq=3.0), with freq of:
                3.0 = termFreq=3.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.0625 = fieldNorm(doc=3566)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Year
    1989
  12. Pao, M.L.; Worthen, D.B.: Retrieval effectiveness by semantic and citation searching (1989) 0.00 
    0.0017402924 = product of:
  0.019143216 = sum of:
    0.019143216 = product of:
      0.057429645 = sum of:
        0.057429645 = weight(_text_:1989 in 2288) [ClassicSimilarity], result of:
          0.057429645 = score(doc=2288,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.5115164 = fieldWeight in 2288, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.046875 = fieldNorm(doc=2288)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Journal of the American Society for Information Science. 40(1989), S.226-235
    Year
    1989
  13. MacCain, K.W.: Descriptor and citation retrieval in the medical behavioral sciences literature : retrieval overlaps and novelty distribution (1989) 0.00 
    0.0017402924 = product of:
  0.019143216 = sum of:
    0.019143216 = product of:
      0.057429645 = sum of:
        0.057429645 = weight(_text_:1989 in 2290) [ClassicSimilarity], result of:
          0.057429645 = score(doc=2290,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.5115164 = fieldWeight in 2290, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.046875 = fieldNorm(doc=2290)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Journal of the American Society for Information Science. 40(1989), S.110-114
    Year
    1989
  14. Gordon, M.; Kochen, M.: Recall-precision trade-off : a derivation (1989) 0.00 
    0.0017402924 = product of:
  0.019143216 = sum of:
    0.019143216 = product of:
      0.057429645 = sum of:
        0.057429645 = weight(_text_:1989 in 4160) [ClassicSimilarity], result of:
          0.057429645 = score(doc=4160,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.5115164 = fieldWeight in 4160, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.046875 = fieldNorm(doc=4160)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Journal of the American Society for Information Science. 40(1989) no.3, S.145-151
    Year
    1989
  15. Lochbaum, K.E.; Streeter, A.R.: Comparing and combining the effectiveness of latent semantic indexing and the ordinary vector space model for information retrieval (1989) 0.00 
    0.0017402924 = product of:
  0.019143216 = sum of:
    0.019143216 = product of:
      0.057429645 = sum of:
        0.057429645 = weight(_text_:1989 in 3458) [ClassicSimilarity], result of:
          0.057429645 = score(doc=3458,freq=5.0), product of:
            0.11227332 = queryWeight, product of:
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.023006115 = queryNorm
            0.5115164 = fieldWeight in 3458, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.8801513 = idf(docFreq=912, maxDocs=44218)
              0.046875 = fieldNorm(doc=3458)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Source
    Information processing and management. 25(1989) no.6, S. 665-676
    Year
    1989
  16. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.00 
    0.0013223683 = product of:
  0.014546051 = sum of:
    0.014546051 = product of:
      0.04363815 = sum of:
        0.04363815 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
          0.04363815 = score(doc=262,freq=2.0), product of:
            0.08056349 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.023006115 = queryNorm
            0.5416616 = fieldWeight in 262, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=262)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Date
    20.10.2000 12:22:23
  17. Blair, D.C.; Maron, M.E.: ¬An evaluation of retrieval effectiveness for a full-text document-retrieval system (1985) 0.00 
    9.5312286E-4 = product of:
  0.010484351 = sum of:
    0.010484351 = product of:
      0.03145305 = sum of:
        0.03145305 = weight(_text_:29 in 1345) [ClassicSimilarity], result of:
          0.03145305 = score(doc=1345,freq=2.0), product of:
            0.08092832 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.023006115 = queryNorm
            0.38865322 = fieldWeight in 1345, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.078125 = fieldNorm(doc=1345)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Footnote
    Vgl. auch : Salton, G.: Another look ... Comm. ACM 29(1986) S.S.648-656; Blair, D.C.: Full text retrieval ... Int. Class. 13(1986) S.18-23: Blair, D.C., M.E. Maron: Full-text information retrieval ... Inf. proc. man. 26(1990) S.437-447.
  18. Hodges, P.R.: Keyword in title indexes : effectiveness of retrieval in computer searches (1983) 0.00 
    6.6118414E-4 = product of:
  0.0072730253 = sum of:
    0.0072730253 = product of:
      0.021819076 = sum of:
        0.021819076 = weight(_text_:22 in 5001) [ClassicSimilarity], result of:
          0.021819076 = score(doc=5001,freq=2.0), product of:
            0.08056349 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.023006115 = queryNorm
            0.2708308 = fieldWeight in 5001, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5001)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Date
    14. 3.1996 13:22:21
  19. Blair, D.C.: Full text retrieval : Evaluation and implications (1986) 0.00 
    5.718737E-4 = product of:
  0.0062906104 = sum of:
    0.0062906104 = product of:
      0.01887183 = sum of:
        0.01887183 = weight(_text_:29 in 2047) [ClassicSimilarity], result of:
          0.01887183 = score(doc=2047,freq=2.0), product of:
            0.08092832 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.023006115 = queryNorm
            0.23319192 = fieldWeight in 2047, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.046875 = fieldNorm(doc=2047)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Footnote
    Vgl.: Blair, D.C., M.E. Maron: An evaluation ... Comm. ACM 28(1985) S.280-299; Salton, G.: Another look ... Comm. ACM 29(1986) S.648-656; Blair, D.C., M.E. Maron: Full-text information retrieval ... Inf. Proc. Man. 26(1990) S.437-447.
  20. Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985) 0.00 
    4.894657E-4 = product of:
  0.005384123 = sum of:
    0.005384123 = product of:
      0.016152369 = sum of:
        0.016152369 = weight(_text_:f in 3649) [ClassicSimilarity], result of:
          0.016152369 = score(doc=3649,freq=2.0), product of:
            0.09169745 = queryWeight, product of:
              3.985786 = idf(docFreq=2232, maxDocs=44218)
              0.023006115 = queryNorm
            0.17614852 = fieldWeight in 3649, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.985786 = idf(docFreq=2232, maxDocs=44218)
              0.03125 = fieldNorm(doc=3649)
      0.33333334 = coord(1/3)
  0.09090909 = coord(1/11)
    Abstract
    F. W. Lancaster is known for his writing an the state of the art in librarylinformation science. His skill in identifying significant contributions and synthesizing literature in fields as diverse as online systems, vocabulary control, measurement and evaluation, and the paperless society have earned him esteem as a chronicler of information science. Equally deserving of repute is his own contribution to research in the discipline-his evaluation of the MEDLARS operating system. The MEDLARS study is notable for several reasons. It was the first large-scale application of retrieval experiment methodology to the evaluation of an actual operating system. As such, problems had to be faced that do not arise in laboratory-like conditions. One example is the problem of recall: how to determine, for a very large and dynamic database, the number of documents relevant to a given search request. By solving this problem and others attendant upon transferring an experimental methodology to the real world, Lancaster created a constructive procedure that could be used to improve the design and functioning of retrieval systems. The MEDLARS study is notable also for its contribution to our understanding of what constitutes a good index language and good indexing. The ideal retrieval system would be one that retrieves all and only relevant documents. The failures that occur in real operating systems, when a relevant document is not retrieved (a recall failure) or an irrelevant document is retrieved (a precision failure), can be analysed to assess the impact of various factors an the performance of the system. This is exactly what Lancaster did. He found both the MEDLARS indexing and the McSH index language to be significant factors affecting retrieval performance. The indexing, primarily because it was insufficiently exhaustive, explained a large number of recall failures. The index language, largely because of its insufficient specificity, accounted for a large number of precision failures. The purpose of identifying factors responsible for a system's failures is ultimately to improve the system. Unlike many user studies, the MEDLARS evaluation yielded recommendations that were eventually implemented.* Indexing exhaustivity was increased and the McSH index language was enriched with more specific terms and a larger entry vocabulary.

Authors

Languages

Types

  • a 18
  • s 2

Themes