Search (71 results, page 1 of 4)

  • × theme_ss:"Retrievalstudien"
  1. Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983) 0.07
    0.0696447 = product of:
      0.1392894 = sum of:
        0.1392894 = sum of:
          0.07780732 = weight(_text_:t in 2417) [ClassicSimilarity], result of:
            0.07780732 = score(doc=2417,freq=2.0), product of:
              0.17876579 = queryWeight, product of:
                3.9394085 = idf(docFreq=2338, maxDocs=44218)
                0.04537884 = queryNorm
              0.43524727 = fieldWeight in 2417, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9394085 = idf(docFreq=2338, maxDocs=44218)
                0.078125 = fieldNorm(doc=2417)
          0.06148207 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
            0.06148207 = score(doc=2417,freq=2.0), product of:
              0.15890898 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.04537884 = 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)
    
    Pages
    S.22-25
  2. Ravana, S.D.; Taheri, M.S.; Rajagopal, P.: Document-based approach to improve the accuracy of pairwise comparison in evaluating information retrieval systems (2015) 0.03
    0.03482235 = product of:
      0.0696447 = sum of:
        0.0696447 = sum of:
          0.03890366 = weight(_text_:t in 2587) [ClassicSimilarity], result of:
            0.03890366 = score(doc=2587,freq=2.0), product of:
              0.17876579 = queryWeight, product of:
                3.9394085 = idf(docFreq=2338, maxDocs=44218)
                0.04537884 = queryNorm
              0.21762364 = fieldWeight in 2587, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9394085 = idf(docFreq=2338, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2587)
          0.030741034 = weight(_text_:22 in 2587) [ClassicSimilarity], result of:
            0.030741034 = score(doc=2587,freq=2.0), product of:
              0.15890898 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.04537884 = queryNorm
              0.19345059 = fieldWeight in 2587, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2587)
      0.5 = coord(1/2)
    
    Abstract
    Purpose The purpose of this paper is to propose a method to have more accurate results in comparing performance of the paired information retrieval (IR) systems with reference to the current method, which is based on the mean effectiveness scores of the systems across a set of identified topics/queries. Design/methodology/approach Based on the proposed approach, instead of the classic method of using a set of topic scores, the documents level scores are considered as the evaluation unit. These document scores are the defined document's weight, which play the role of the mean average precision (MAP) score of the systems as a significance test's statics. The experiments were conducted using the TREC 9 Web track collection. Findings The p-values generated through the two types of significance tests, namely the Student's t-test and Mann-Whitney show that by using the document level scores as an evaluation unit, the difference between IR systems is more significant compared with utilizing topic scores. Originality/value Utilizing a suitable test collection is a primary prerequisite for IR systems comparative evaluation. However, in addition to reusable test collections, having an accurate statistical testing is a necessity for these evaluations. The findings of this study will assist IR researchers to evaluate their retrieval systems and algorithms more accurately.
    Date
    20. 1.2015 18:30:22
  3. Strzalkowski, T.; Guthrie, L.; Karlgren, J.; Leistensnider, J.; Lin, F.; Perez-Carballo, J.; Straszheim, T.; Wang, J.; Wilding, J.: Natural language information retrieval : TREC-5 report (1997) 0.03
    0.027509041 = product of:
      0.055018082 = sum of:
        0.055018082 = product of:
          0.110036165 = sum of:
            0.110036165 = weight(_text_:t in 3100) [ClassicSimilarity], result of:
              0.110036165 = score(doc=3100,freq=4.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.6155326 = fieldWeight in 3100, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3100)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  4. 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) 0.02
    0.023342196 = product of:
      0.04668439 = sum of:
        0.04668439 = product of:
          0.09336878 = sum of:
            0.09336878 = weight(_text_:t in 5105) [ClassicSimilarity], result of:
              0.09336878 = score(doc=5105,freq=8.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.5222967 = fieldWeight in 5105, product of:
                  2.828427 = tf(freq=8.0), with freq of:
                    8.0 = termFreq=8.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5105)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Nachrichten für Dokumentation. 42(1991) H.2, S.107-114. (T.1); 42(1991) H.3, S.177-190 (T.2)
  5. Davis, M.; Dunning, T.: ¬A TREC evaluation of query translation methods for multi-lingual text retrieval (1996) 0.02
    0.023342196 = product of:
      0.04668439 = sum of:
        0.04668439 = product of:
          0.09336878 = sum of:
            0.09336878 = weight(_text_:t in 1917) [ClassicSimilarity], result of:
              0.09336878 = score(doc=1917,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.5222967 = fieldWeight in 1917, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.09375 = fieldNorm(doc=1917)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  6. Strzalkowski, T.; Perez-Carballo, J.: Natural language information retrieval : TREC-4 report (1996) 0.02
    0.023342196 = product of:
      0.04668439 = sum of:
        0.04668439 = product of:
          0.09336878 = sum of:
            0.09336878 = weight(_text_:t in 3211) [ClassicSimilarity], result of:
              0.09336878 = score(doc=3211,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.5222967 = fieldWeight in 3211, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3211)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  7. Strzalkowski, T.; Sparck Jones, K.: NLP track at TREC-5 (1997) 0.02
    0.023342196 = product of:
      0.04668439 = sum of:
        0.04668439 = product of:
          0.09336878 = sum of:
            0.09336878 = weight(_text_:t in 3098) [ClassicSimilarity], result of:
              0.09336878 = score(doc=3098,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.5222967 = fieldWeight in 3098, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3098)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  8. Kuriyama, K.; Kando, N.; Nozue, T.; Eguchi, K.: Pooling for a large-scale test collection : an analysis of the search results from the First NTCIR Workshop (2002) 0.02
    0.023342196 = product of:
      0.04668439 = sum of:
        0.04668439 = product of:
          0.09336878 = sum of:
            0.09336878 = weight(_text_:t in 3830) [ClassicSimilarity], result of:
              0.09336878 = score(doc=3830,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.5222967 = fieldWeight in 3830, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3830)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  9. Agata, T.: ¬A measure for evaluating search engines on the World Wide Web : retrieval test with ESL (Expected Search Length) (1997) 0.02
    0.023342196 = product of:
      0.04668439 = sum of:
        0.04668439 = product of:
          0.09336878 = sum of:
            0.09336878 = weight(_text_:t in 3892) [ClassicSimilarity], result of:
              0.09336878 = score(doc=3892,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.5222967 = fieldWeight in 3892, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3892)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  10. Mandl, T.: Neue Entwicklungen bei den Evaluierungsinitiativen im Information Retrieval (2006) 0.02
    0.022007234 = product of:
      0.04401447 = sum of:
        0.04401447 = product of:
          0.08802894 = sum of:
            0.08802894 = weight(_text_:t in 5975) [ClassicSimilarity], result of:
              0.08802894 = score(doc=5975,freq=4.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.49242607 = fieldWeight in 5975, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.0625 = fieldNorm(doc=5975)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Effektive Information Retrieval Verfahren in Theorie und Praxis: ausgewählte und erweiterte Beiträge des Vierten Hildesheimer Evaluierungs- und Retrievalworkshop (HIER 2005), Hildesheim, 20.7.2005. Hrsg.: T. Mandl u. C. Womser-Hacker
  11. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.02
    0.021518724 = product of:
      0.043037448 = sum of:
        0.043037448 = product of:
          0.086074896 = sum of:
            0.086074896 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
              0.086074896 = score(doc=262,freq=2.0), product of:
                0.15890898 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04537884 = 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
  12. Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998) 0.02
    0.021518724 = product of:
      0.043037448 = sum of:
        0.043037448 = product of:
          0.086074896 = sum of:
            0.086074896 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
              0.086074896 = score(doc=6418,freq=2.0), product of:
                0.15890898 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04537884 = 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
  13. Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000) 0.02
    0.021518724 = product of:
      0.043037448 = sum of:
        0.043037448 = product of:
          0.086074896 = sum of:
            0.086074896 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
              0.086074896 = score(doc=6438,freq=2.0), product of:
                0.15890898 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04537884 = 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
  14. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 0.02
    0.021518724 = product of:
      0.043037448 = sum of:
        0.043037448 = product of:
          0.086074896 = sum of:
            0.086074896 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
              0.086074896 = score(doc=5089,freq=2.0), product of:
                0.15890898 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04537884 = 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
  15. Brown, E.W.; Carmel, D.; Franz, M.; Ittycheriah, A.; Kanungo, T.; Maarek, Y.; McCarley, J.S.; Mack, R.L.; Prager, J.M.; Smith, J.R.; Soffer, A.; Zien, J.Y.; Marwick, A.D.: IBM research activities at TREC (2005) 0.02
    0.01945183 = product of:
      0.03890366 = sum of:
        0.03890366 = product of:
          0.07780732 = sum of:
            0.07780732 = weight(_text_:t in 5093) [ClassicSimilarity], result of:
              0.07780732 = score(doc=5093,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.43524727 = fieldWeight in 5093, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.078125 = fieldNorm(doc=5093)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  16. Becks, D.; Mandl, T.; Womser-Hacker, C.: Spezielle Anforderungen bei der Evaluierung von Patent-Retrieval-Systemen (2010) 0.02
    0.01925633 = product of:
      0.03851266 = sum of:
        0.03851266 = product of:
          0.07702532 = sum of:
            0.07702532 = weight(_text_:t in 4667) [ClassicSimilarity], result of:
              0.07702532 = score(doc=4667,freq=4.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.4308728 = fieldWeight in 4667, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=4667)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Information und Wissen: global, sozial und frei? Proceedings des 12. Internationalen Symposiums für Informationswissenschaft (ISI 2011) ; Hildesheim, 9. - 11. März 2011. Hrsg.: J. Griesbaum, T. Mandl u. C. Womser-Hacker
  17. Bellardo, T.; Saracevic, T.: Online searching and search output : relationships between overlap, relevance, recall and precision (1987) 0.02
    0.016505426 = product of:
      0.03301085 = sum of:
        0.03301085 = product of:
          0.0660217 = sum of:
            0.0660217 = weight(_text_:t in 4150) [ClassicSimilarity], result of:
              0.0660217 = score(doc=4150,freq=4.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.36931956 = fieldWeight in 4150, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4150)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  18. Saracevic, T.: Individual differences in organizing, searching and retrieving information (1991) 0.02
    0.015561464 = product of:
      0.031122928 = sum of:
        0.031122928 = product of:
          0.062245857 = sum of:
            0.062245857 = weight(_text_:t in 3692) [ClassicSimilarity], result of:
              0.062245857 = score(doc=3692,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.34819782 = fieldWeight in 3692, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3692)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  19. Barry, C.I.; Schamber, L.: User-defined relevance criteria : a comparison of 2 studies (1995) 0.02
    0.015561464 = product of:
      0.031122928 = sum of:
        0.031122928 = product of:
          0.062245857 = sum of:
            0.062245857 = weight(_text_:t in 3850) [ClassicSimilarity], result of:
              0.062245857 = score(doc=3850,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.34819782 = fieldWeight in 3850, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3850)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Forging new partnerships in information: converging technologies. Proceedings of the 58th Annual Meeting of the American Society for Information Science, ASIS'95, Chicago, IL, 9-12 October 1995. Ed.: T. Kinney
  20. Pfeifer, U.; Poersch, T.; Fuhr, N.: Retrieval effectiveness of proper name search methods (1996) 0.02
    0.015561464 = product of:
      0.031122928 = sum of:
        0.031122928 = product of:
          0.062245857 = sum of:
            0.062245857 = weight(_text_:t in 6982) [ClassicSimilarity], result of:
              0.062245857 = score(doc=6982,freq=2.0), product of:
                0.17876579 = queryWeight, product of:
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.04537884 = queryNorm
                0.34819782 = fieldWeight in 6982, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9394085 = idf(docFreq=2338, maxDocs=44218)
                  0.0625 = fieldNorm(doc=6982)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    

Languages

  • e 57
  • d 10
  • f 1
  • ja 1
  • m 1
  • More… Less…

Types

  • a 64
  • s 5
  • m 4
  • p 1
  • More… Less…