Search (27 results, page 1 of 2)

  • × theme_ss:"Retrievalstudien"
  • × year_i:[1990 TO 2000}
  1. Krause, J.; Womser-Hacker, C.: PADOK-II : Retrievaltests zur Bewertung von Volltextindexierungsvarianten für das deutsche Patentinformationssystem (1990) 0.01
    0.008148543 = product of:
      0.073336884 = sum of:
        0.073336884 = product of:
          0.14667377 = sum of:
            0.14667377 = weight(_text_:bewertung in 2653) [ClassicSimilarity], result of:
              0.14667377 = score(doc=2653,freq=4.0), product of:
                0.18575147 = queryWeight, product of:
                  6.31699 = idf(docFreq=216, maxDocs=44218)
                  0.02940506 = queryNorm
                0.78962374 = fieldWeight in 2653, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  6.31699 = idf(docFreq=216, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2653)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Abstract
    Vorgestellt werden die Ergebnisse extensiver Retrievaltests von zwei Varianten von Inhalteserschließungen (Freitext und PASSAT) für das deutsche Patentinformationssystem auf der Basis von Volltexten. Die Tests führte die Fachgruppe Linguistische Informationswissenschaft der Universität Regensburg von 1986-1989 in Zusammenarbeit mit dem Deutschen Patentamt, dem Fachinformationszentrum Karlsruhe und meheren industrieellen Partnern durch. Der Schwerpunkt des Berichts liegt auf dem allgemeinen Ansatz der Bewertung der Ziele des Projekts und auf der Darstellung der statistischen Evaluierungsergebnisse.
  2. Pemberton, J.K.; Ojala, M.; Garman, N.: Head to head : searching the Web versus traditional services (1998) 0.01
    0.0066170194 = product of:
      0.029776588 = sum of:
        0.013840669 = product of:
          0.027681338 = sum of:
            0.027681338 = weight(_text_:web in 3572) [ClassicSimilarity], result of:
              0.027681338 = score(doc=3572,freq=2.0), product of:
                0.09596372 = queryWeight, product of:
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.02940506 = queryNorm
                0.2884563 = fieldWeight in 3572, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3572)
          0.5 = coord(1/2)
        0.015935918 = product of:
          0.031871837 = sum of:
            0.031871837 = weight(_text_:22 in 3572) [ClassicSimilarity], result of:
              0.031871837 = score(doc=3572,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.30952093 = fieldWeight in 3572, 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=3572)
          0.5 = coord(1/2)
      0.22222222 = coord(2/9)
    
    Source
    Online. 22(1998) no.3, S.24-26,28
  3. Kaltenborn, K.-F.: Endnutzerrecherchen in der CD-ROM-Datenbank Medline : T.1: Evaluations- und Benutzerforschung über Nutzungscharakteristika, Bewertung der Rechercheergebnisse und künftige Informationsgewinnung; T.2: Evaluations- und Benutzerforschung über Recherchequalität und Nutzer-Computer/Datenbank-Interaktion (1991) 0.00
    0.0043214173 = product of:
      0.038892757 = sum of:
        0.038892757 = product of:
          0.077785514 = sum of:
            0.077785514 = weight(_text_:bewertung in 5105) [ClassicSimilarity], result of:
              0.077785514 = score(doc=5105,freq=2.0), product of:
                0.18575147 = queryWeight, product of:
                  6.31699 = idf(docFreq=216, maxDocs=44218)
                  0.02940506 = queryNorm
                0.41876122 = fieldWeight in 5105, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  6.31699 = idf(docFreq=216, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5105)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
  4. Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998) 0.00
    0.0030986508 = product of:
      0.027887857 = sum of:
        0.027887857 = product of:
          0.055775713 = sum of:
            0.055775713 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
              0.055775713 = score(doc=6418,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = 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)
      0.11111111 = coord(1/9)
    
    Source
    Online. 22(1998) no.6, S.57-58
  5. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 0.00
    0.0030986508 = product of:
      0.027887857 = sum of:
        0.027887857 = product of:
          0.055775713 = sum of:
            0.055775713 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
              0.055775713 = score(doc=5089,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = 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)
      0.11111111 = coord(1/9)
    
    Date
    22. 7.2006 18:43:54
  6. Clarke, S.J.; Willett, P.: Estimating the recall performance of Web search engines (1997) 0.00
    0.0030757042 = product of:
      0.027681338 = sum of:
        0.027681338 = product of:
          0.055362675 = sum of:
            0.055362675 = weight(_text_:web in 760) [ClassicSimilarity], result of:
              0.055362675 = score(doc=760,freq=8.0), product of:
                0.09596372 = queryWeight, product of:
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.02940506 = queryNorm
                0.5769126 = fieldWeight in 760, product of:
                  2.828427 = tf(freq=8.0), with freq of:
                    8.0 = termFreq=8.0
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.0625 = fieldNorm(doc=760)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Abstract
    Reports a comparison of the retrieval effectiveness of the AltaVista, Excite and Lycos Web search engines. Describes a method for comparing the recall of the 3 sets of searches, despite the fact that they are carried out on non identical sets of Web pages. It is thus possible, unlike previous comparative studies of Web search engines, to consider both recall and precision when evaluating the effectiveness of search engines
  7. Agata, T.: ¬A measure for evaluating search engines on the World Wide Web : retrieval test with ESL (Expected Search Length) (1997) 0.00
    0.002306778 = product of:
      0.020761002 = sum of:
        0.020761002 = product of:
          0.041522004 = sum of:
            0.041522004 = weight(_text_:web in 3892) [ClassicSimilarity], result of:
              0.041522004 = score(doc=3892,freq=2.0), product of:
                0.09596372 = queryWeight, product of:
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.02940506 = queryNorm
                0.43268442 = fieldWeight in 3892, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3892)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
  8. Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997) 0.00
    0.002213322 = product of:
      0.019919898 = sum of:
        0.019919898 = product of:
          0.039839797 = sum of:
            0.039839797 = weight(_text_:22 in 3103) [ClassicSimilarity], result of:
              0.039839797 = score(doc=3103,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = 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)
      0.11111111 = coord(1/9)
    
    Date
    27. 2.1999 20:55:22
  9. 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) 0.00
    0.002213322 = product of:
      0.019919898 = sum of:
        0.019919898 = product of:
          0.039839797 = sum of:
            0.039839797 = weight(_text_:22 in 3107) [ClassicSimilarity], result of:
              0.039839797 = score(doc=3107,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = 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)
      0.11111111 = coord(1/9)
    
    Date
    27. 2.1999 20:59:22
  10. Sanderson, M.: ¬The Reuters test collection (1996) 0.00
    0.0017706576 = product of:
      0.015935918 = sum of:
        0.015935918 = product of:
          0.031871837 = sum of:
            0.031871837 = weight(_text_:22 in 6971) [ClassicSimilarity], result of:
              0.031871837 = score(doc=6971,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = 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)
      0.11111111 = coord(1/9)
    
    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
  11. Lespinasse, K.: TREC: une conference pour l'evaluation des systemes de recherche d'information (1997) 0.00
    0.0017706576 = product of:
      0.015935918 = sum of:
        0.015935918 = product of:
          0.031871837 = sum of:
            0.031871837 = weight(_text_:22 in 744) [ClassicSimilarity], result of:
              0.031871837 = score(doc=744,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.30952093 = fieldWeight in 744, 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=744)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Date
    1. 8.1996 22:01:00
  12. ¬The Fifth Text Retrieval Conference (TREC-5) (1997) 0.00
    0.0017706576 = product of:
      0.015935918 = sum of:
        0.015935918 = product of:
          0.031871837 = sum of:
            0.031871837 = weight(_text_:22 in 3087) [ClassicSimilarity], result of:
              0.031871837 = score(doc=3087,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.30952093 = fieldWeight in 3087, 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=3087)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Abstract
    Proceedings of the 5th TREC-confrerence held in Gaithersburgh, Maryland, Nov 20-22, 1996. Aim of the conference was discussion on retrieval techniques for large test collections. Different research groups used different techniques, such as automated thesauri, term weighting, natural language techniques, relevance feedback and advanced pattern matching, for information retrieval from the same large database. This procedure makes it possible to compare the results. The proceedings include papers, tables of the system results, and brief system descriptions including timing and storage information
  13. Ellis, D.: Progress and problems in information retrieval (1996) 0.00
    0.0017706576 = product of:
      0.015935918 = sum of:
        0.015935918 = product of:
          0.031871837 = sum of:
            0.031871837 = weight(_text_:22 in 789) [ClassicSimilarity], result of:
              0.031871837 = score(doc=789,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.30952093 = fieldWeight in 789, 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=789)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Date
    26. 7.2002 20:22:46
  14. MacCall, S.L.; Cleveland, A.D.: ¬A relevance-based quantitative measure for Internet information retrieval evaluation (1999) 0.00
    0.0016311385 = product of:
      0.014680246 = sum of:
        0.014680246 = product of:
          0.029360492 = sum of:
            0.029360492 = weight(_text_:web in 6689) [ClassicSimilarity], result of:
              0.029360492 = score(doc=6689,freq=4.0), product of:
                0.09596372 = queryWeight, product of:
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.02940506 = queryNorm
                0.3059541 = fieldWeight in 6689, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.046875 = fieldNorm(doc=6689)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Abstract
    An important indicator of a maturating Internet is the development of metrics for its evaluation as a practical tool for enduser information retrieval. However, the Internet presents specific problems for traditional IR measures, such as the need to deal with the variety of classes of retrieval tools. This paper presents a metric for comparing the performance of common classes of Internet information retrieval tool, including human indexed catalogs of web resources and automatically indexed databases of web pages. The metric uses a relevance-based quantitative measure to compare the performance of endusers using these Internet information retrieval tools. The benefit of the proposed metric is that it is relevance-based (using enduser relevance judgments), and it facilitates the comparison of the performance of different classes of IIR tools
  15. Smithson, S.: Information retrieval evaluation in practice : a case study approach (1994) 0.00
    0.0015493254 = product of:
      0.013943928 = sum of:
        0.013943928 = product of:
          0.027887857 = sum of:
            0.027887857 = weight(_text_:22 in 7302) [ClassicSimilarity], result of:
              0.027887857 = score(doc=7302,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.2708308 = fieldWeight in 7302, 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=7302)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Abstract
    The evaluation of information retrieval systems is an important yet difficult operation. This paper describes an exploratory evaluation study that takes an interpretive approach to evaluation. The longitudinal study examines evaluation through the information-seeking behaviour of 22 case studies of 'real' users. The eclectic approach to data collection produced behavioral data that is compared with relevance judgements and satisfaction ratings. The study demonstrates considerable variations among the cases, among different evaluation measures within the same case, and among the same measures at different stages within a single case. It is argued that those involved in evaluation should be aware of the difficulties, and base any evaluation on a good understanding of the cases in question
  16. Blair, D.C.: STAIRS Redux : thoughts on the STAIRS evaluation, ten years after (1996) 0.00
    0.0015493254 = product of:
      0.013943928 = sum of:
        0.013943928 = product of:
          0.027887857 = sum of:
            0.027887857 = weight(_text_:22 in 3002) [ClassicSimilarity], result of:
              0.027887857 = score(doc=3002,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.2708308 = fieldWeight in 3002, 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=3002)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Source
    Journal of the American Society for Information Science. 47(1996) no.1, S.4-22
  17. Losee, R.M.: Determining information retrieval and filtering performance without experimentation (1995) 0.00
    0.0015493254 = product of:
      0.013943928 = sum of:
        0.013943928 = product of:
          0.027887857 = sum of:
            0.027887857 = weight(_text_:22 in 3368) [ClassicSimilarity], result of:
              0.027887857 = score(doc=3368,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.2708308 = fieldWeight in 3368, 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=3368)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Date
    22. 2.1996 13:14:10
  18. Brown, M.E.: By any other name : accounting for failure in the naming of subject categories (1995) 0.00
    0.0015493254 = product of:
      0.013943928 = sum of:
        0.013943928 = product of:
          0.027887857 = sum of:
            0.027887857 = weight(_text_:22 in 5598) [ClassicSimilarity], result of:
              0.027887857 = score(doc=5598,freq=2.0), product of:
                0.10297151 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.02940506 = queryNorm
                0.2708308 = fieldWeight in 5598, 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=5598)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Date
    2.11.1996 13:08:22
  19. Davis, C.H.: From document retrieval to Web browsing : some universal concerns (1997) 0.00
    0.0013456206 = product of:
      0.012110585 = sum of:
        0.012110585 = product of:
          0.02422117 = sum of:
            0.02422117 = weight(_text_:web in 399) [ClassicSimilarity], result of:
              0.02422117 = score(doc=399,freq=2.0), product of:
                0.09596372 = queryWeight, product of:
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.02940506 = queryNorm
                0.25239927 = fieldWeight in 399, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=399)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
  20. Wu, C.-J.: Experiments on using the Dublin Core to reduce the retrieval error ratio (1998) 0.00
    0.0013456206 = product of:
      0.012110585 = sum of:
        0.012110585 = product of:
          0.02422117 = sum of:
            0.02422117 = weight(_text_:web in 5201) [ClassicSimilarity], result of:
              0.02422117 = score(doc=5201,freq=2.0), product of:
                0.09596372 = queryWeight, product of:
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.02940506 = queryNorm
                0.25239927 = fieldWeight in 5201, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.2635105 = idf(docFreq=4597, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=5201)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Abstract
    In order to test the power of metadata on information retrieval, an experiment was designed and conducted on a group of 7 graduate students using the Dublin Core as the cataloguing metadata. Results show that, on average, the retrieval error rate is only 2.9 per cent for the MES system (http://140.136.85.194), which utilizes the Dublin Core to describe the documents on the World Wide Web, in contrast to 20.7 per cent for the 7 famous search engines including HOTBOT, GAIS, LYCOS, EXCITE, INFOSEEK, YAHOO, and OCTOPUS. The very low error rate indicates that the users can use the information of the Dublin Core to decide whether to retrieve the documents or not