Search (73 results, page 1 of 4)

  • × theme_ss:"Retrievalstudien"
  1. Sanderson, M.: ¬The Reuters test collection (1996) 0.04
    0.038433336 = product of:
      0.07686667 = sum of:
        0.07686667 = sum of:
          0.036273383 = weight(_text_:r in 6971) [ClassicSimilarity], result of:
            0.036273383 = score(doc=6971,freq=2.0), product of:
              0.12397416 = queryWeight, product of:
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.037451506 = queryNorm
              0.29258826 = fieldWeight in 6971, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.0625 = fieldNorm(doc=6971)
          0.040593293 = weight(_text_:22 in 6971) [ClassicSimilarity], result of:
            0.040593293 = score(doc=6971,freq=2.0), product of:
              0.13114879 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.037451506 = queryNorm
              0.30952093 = fieldWeight in 6971, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=6971)
      0.5 = coord(1/2)
    
    Source
    Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
  2. Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001) 0.04
    0.038433336 = product of:
      0.07686667 = sum of:
        0.07686667 = sum of:
          0.036273383 = weight(_text_:r in 261) [ClassicSimilarity], result of:
            0.036273383 = score(doc=261,freq=2.0), product of:
              0.12397416 = queryWeight, product of:
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.037451506 = queryNorm
              0.29258826 = fieldWeight in 261, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.0625 = fieldNorm(doc=261)
          0.040593293 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
            0.040593293 = score(doc=261,freq=2.0), product of:
              0.13114879 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.037451506 = queryNorm
              0.30952093 = fieldWeight in 261, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=261)
      0.5 = coord(1/2)
    
    Abstract
    Die deutschen Suchmaschinen, Abacho, Acoon, Fireball und Lycos sowie die Web-Kataloge Web.de und Yahoo! werden einem Qualitätstest nach relativem Recall, Precision und Availability unterzogen. Die Methoden der Retrievaltests werden vorgestellt. Im Durchschnitt werden bei einem Cut-Off-Wert von 25 ein Recall von rund 22%, eine Precision von knapp 19% und eine Verfügbarkeit von 24% erreicht
  3. Wood, F.; Ford, N.; Miller, D.; Sobczyk, G.; Duffin, R.: Information skills, searching behaviour and cognitive styles for student-centred learning : a computer-assisted learning approach (1996) 0.03
    0.028825004 = product of:
      0.057650007 = sum of:
        0.057650007 = sum of:
          0.027205039 = weight(_text_:r in 4341) [ClassicSimilarity], result of:
            0.027205039 = score(doc=4341,freq=2.0), product of:
              0.12397416 = queryWeight, product of:
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.037451506 = queryNorm
              0.2194412 = fieldWeight in 4341, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.046875 = fieldNorm(doc=4341)
          0.03044497 = weight(_text_:22 in 4341) [ClassicSimilarity], result of:
            0.03044497 = score(doc=4341,freq=2.0), product of:
              0.13114879 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.037451506 = queryNorm
              0.23214069 = fieldWeight in 4341, 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=4341)
      0.5 = coord(1/2)
    
    Source
    Journal of information science. 22(1996) no.2, S.79-92
  4. Crestani, F.; Rijsbergen, C.J. van: Information retrieval by imaging (1996) 0.03
    0.028825004 = product of:
      0.057650007 = sum of:
        0.057650007 = sum of:
          0.027205039 = weight(_text_:r in 6967) [ClassicSimilarity], result of:
            0.027205039 = score(doc=6967,freq=2.0), product of:
              0.12397416 = queryWeight, product of:
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.037451506 = queryNorm
              0.2194412 = fieldWeight in 6967, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.3102584 = idf(docFreq=4387, maxDocs=44218)
                0.046875 = fieldNorm(doc=6967)
          0.03044497 = weight(_text_:22 in 6967) [ClassicSimilarity], result of:
            0.03044497 = score(doc=6967,freq=2.0), product of:
              0.13114879 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.037451506 = queryNorm
              0.23214069 = fieldWeight in 6967, 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=6967)
      0.5 = coord(1/2)
    
    Source
    Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
  5. Cuadra, C.A.; Katter, R.V.: Experimental studies of relevance judgements: final report : Vol.2: description of individual studies (1967) 0.02
    0.018136691 = product of:
      0.036273383 = sum of:
        0.036273383 = product of:
          0.072546765 = sum of:
            0.072546765 = weight(_text_:r in 5356) [ClassicSimilarity], result of:
              0.072546765 = score(doc=5356,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.5851765 = fieldWeight in 5356, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.125 = fieldNorm(doc=5356)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    r
  6. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.02
    0.017759565 = product of:
      0.03551913 = sum of:
        0.03551913 = product of:
          0.07103826 = sum of:
            0.07103826 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
              0.07103826 = score(doc=262,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = 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)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    20.10.2000 12:22:23
  7. Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998) 0.02
    0.017759565 = product of:
      0.03551913 = sum of:
        0.03551913 = product of:
          0.07103826 = sum of:
            0.07103826 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
              0.07103826 = score(doc=6418,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = queryNorm
                0.5416616 = fieldWeight in 6418, 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=6418)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Online. 22(1998) no.6, S.57-58
  8. Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000) 0.02
    0.017759565 = product of:
      0.03551913 = sum of:
        0.03551913 = product of:
          0.07103826 = sum of:
            0.07103826 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
              0.07103826 = score(doc=6438,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = queryNorm
                0.5416616 = fieldWeight in 6438, 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=6438)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    11. 8.2001 16:22:19
  9. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 0.02
    0.017759565 = product of:
      0.03551913 = sum of:
        0.03551913 = product of:
          0.07103826 = sum of:
            0.07103826 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
              0.07103826 = score(doc=5089,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = queryNorm
                0.5416616 = fieldWeight in 5089, 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=5089)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 7.2006 18:43:54
  10. Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 0.02
    0.015869606 = product of:
      0.031739213 = sum of:
        0.031739213 = product of:
          0.063478425 = sum of:
            0.063478425 = weight(_text_:r in 3858) [ClassicSimilarity], result of:
              0.063478425 = score(doc=3858,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.51202947 = fieldWeight in 3858, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.109375 = fieldNorm(doc=3858)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    r
  11. Hancock-Beaulieu, M.; McKenzie, L.; Irving, A.: Evaluative protocols for searching behaviour in online library catalogues (1991) 0.02
    0.015869606 = product of:
      0.031739213 = sum of:
        0.031739213 = product of:
          0.063478425 = sum of:
            0.063478425 = weight(_text_:r in 347) [ClassicSimilarity], result of:
              0.063478425 = score(doc=347,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.51202947 = fieldWeight in 347, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.109375 = fieldNorm(doc=347)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    r
  12. Grunder, R.: Qualitätskriterien für Datenbanken : Grundsätzliche Überlegungen und Untersuchung ausgewählter Aspekte am Beispiel bibliographischer Online-Datenbanken (1995) 0.02
    0.015869606 = product of:
      0.031739213 = sum of:
        0.031739213 = product of:
          0.063478425 = sum of:
            0.063478425 = weight(_text_:r in 7107) [ClassicSimilarity], result of:
              0.063478425 = score(doc=7107,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.51202947 = fieldWeight in 7107, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.109375 = fieldNorm(doc=7107)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  13. Voorbij, H.: Titelwoorden - trefwoorden : een vergelijkend onderzoek (1997) 0.02
    0.015869606 = product of:
      0.031739213 = sum of:
        0.031739213 = product of:
          0.063478425 = sum of:
            0.063478425 = weight(_text_:r in 3175) [ClassicSimilarity], result of:
              0.063478425 = score(doc=3175,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.51202947 = fieldWeight in 3175, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.109375 = fieldNorm(doc=3175)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    r
  14. Krause, J.; Mutschke, P.: Indexierung und Fulcrum-Evaluierung (1999) 0.02
    0.015869606 = product of:
      0.031739213 = sum of:
        0.031739213 = product of:
          0.063478425 = sum of:
            0.063478425 = weight(_text_:r in 6256) [ClassicSimilarity], result of:
              0.063478425 = score(doc=6256,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.51202947 = fieldWeight in 6256, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6256)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    r
  15. Aitchison, T.M.: Comparative evaluation of index languages : Part I, Design. Part II, Results (1969) 0.02
    0.015869606 = product of:
      0.031739213 = sum of:
        0.031739213 = product of:
          0.063478425 = sum of:
            0.063478425 = weight(_text_:r in 561) [ClassicSimilarity], result of:
              0.063478425 = score(doc=561,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.51202947 = fieldWeight in 561, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.109375 = fieldNorm(doc=561)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    r
  16. Burnett, M.; Fisher, C.; Jones, R.: InTEXT precision indexing in TREC4 (1996) 0.01
    0.013602519 = product of:
      0.027205039 = sum of:
        0.027205039 = product of:
          0.054410078 = sum of:
            0.054410078 = weight(_text_:r in 7529) [ClassicSimilarity], result of:
              0.054410078 = score(doc=7529,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.4388824 = fieldWeight in 7529, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.09375 = fieldNorm(doc=7529)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  17. Burnett, M.; Jones, R.; Pape, L.: InTEXT automatic query enhancements in TREC-5 (1997) 0.01
    0.013602519 = product of:
      0.027205039 = sum of:
        0.027205039 = product of:
          0.054410078 = sum of:
            0.054410078 = weight(_text_:r in 3091) [ClassicSimilarity], result of:
              0.054410078 = score(doc=3091,freq=2.0), product of:
                0.12397416 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.037451506 = queryNorm
                0.4388824 = fieldWeight in 3091, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3091)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  18. Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997) 0.01
    0.012685404 = product of:
      0.025370808 = sum of:
        0.025370808 = product of:
          0.050741617 = sum of:
            0.050741617 = weight(_text_:22 in 3103) [ClassicSimilarity], result of:
              0.050741617 = score(doc=3103,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = queryNorm
                0.38690117 = fieldWeight in 3103, 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=3103)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    27. 2.1999 20:55:22
  19. Ng, K.B.; Loewenstern, D.; Basu, C.; Hirsh, H.; Kantor, P.B.: Data fusion of machine-learning methods for the TREC5 routing tak (and other work) (1997) 0.01
    0.012685404 = product of:
      0.025370808 = sum of:
        0.025370808 = product of:
          0.050741617 = sum of:
            0.050741617 = weight(_text_:22 in 3107) [ClassicSimilarity], result of:
              0.050741617 = score(doc=3107,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = queryNorm
                0.38690117 = fieldWeight in 3107, 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=3107)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    27. 2.1999 20:59:22
  20. Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983) 0.01
    0.012685404 = product of:
      0.025370808 = sum of:
        0.025370808 = product of:
          0.050741617 = sum of:
            0.050741617 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
              0.050741617 = score(doc=2417,freq=2.0), product of:
                0.13114879 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.037451506 = 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)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Pages
    S.22-25

Languages

  • e 55
  • d 15
  • f 1
  • nl 1
  • More… Less…

Types

  • a 54
  • r 12
  • s 5
  • m 3
  • x 1
  • More… Less…