Document (#24522)

Author
Iyengar, S.S.
Title
Visual based retrieval systems and Web mining
Issue
Introduction
Source
Journal of the American Society for Information Science and technology. 52(2001) no.10, S.829-830
Year
2001
Abstract
Relevance has been a difficult concept to define, let alone measure. In this paper, a simple operational definition of relevance is proposed for a Web-based library catalog: whether or not during a search session the user saves, prints, mails, or downloads a citation. If one of those actions is performed, the session is considered relevant to the user. An analysis is presented illustrating the advantages and disadvantages of this definition. With this definition and good transaction logging, it is possible to ascertain the relevance of a session. This was done for 905,970 sessions conducted with the University of California's Melvyl online catalog. Next, a methodology was developed to try to predict the relevance of a session. A number of variables were defined that characterize a session, none of which used any demographic information about the user. The values of the variables were computed for the sessions. Principal components analysis was used to extract a new set of variables out of the original set. A stratified random sampling technique was used to form ten strata such that each new strata of 90,570 sessions contained the same proportion of relevant to nonrelevant sessions. Logistic regression was used to ascertain the regression coefficients for nine of the ten strata. Then, the coefficients were used to predict the relevance of the sessions in the missing strata. Overall, 17.85% of the sessions were determined to be relevant. The predicted number of relevant sessions for all ten strata was 11 %, a 6.85% difference. The authors believe that the methodology can be further refined and the prediction improved. This methodology could also have significant application in improving user searching and also in predicting electronic commerce buying decisions without the use of personal demographic data
Theme
Internet
Multimedia
Form
Bilder

Similar documents (content)

  1. Cooper, M.D.; Chen, H.-M.: Predicting the relevance of a library catalog search (2001) 2.75
    2.7510448 = sum of:
      2.7510448 = sum of:
        0.04270556 = weight(abstract_txt:logistic in 1520) [ClassicSimilarity], result of:
          0.04270556 = score(doc=1520,freq=1.0), product of:
            0.09360365 = queryWeight, product of:
              8.342641 = idf(docFreq=27, maxDocs=43254)
              0.011219907 = queryNorm
            0.45623818 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.342641 = idf(docFreq=27, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.045116823 = weight(abstract_txt:prints in 1520) [ClassicSimilarity], result of:
          0.045116823 = score(doc=1520,freq=1.0), product of:
            0.0970947 = queryWeight, product of:
              1.0184773 = boost
              8.496791 = idf(docFreq=23, maxDocs=43254)
              0.011219907 = queryNorm
            0.46466824 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.496791 = idf(docFreq=23, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.04894147 = weight(abstract_txt:stratified in 1520) [ClassicSimilarity], result of:
          0.04894147 = score(doc=1520,freq=1.0), product of:
            0.10250723 = queryWeight, product of:
              1.0464798 = boost
              8.730406 = idf(docFreq=18, maxDocs=43254)
              0.011219907 = queryNorm
            0.47744405 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.730406 = idf(docFreq=18, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.055605017 = weight(abstract_txt:buying in 1520) [ClassicSimilarity], result of:
          0.055605017 = score(doc=1520,freq=1.0), product of:
            0.11161241 = queryWeight, product of:
              1.0919678 = boost
              9.109896 = idf(docFreq=12, maxDocs=43254)
              0.011219907 = queryNorm
            0.49819744 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.109896 = idf(docFreq=12, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.058720455 = weight(abstract_txt:nonrelevant in 1520) [ClassicSimilarity], result of:
          0.058720455 = score(doc=1520,freq=1.0), product of:
            0.11574337 = queryWeight, product of:
              1.111992 = boost
              9.27695 = idf(docFreq=10, maxDocs=43254)
              0.011219907 = queryNorm
            0.5073332 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.27695 = idf(docFreq=10, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.06261403 = weight(abstract_txt:california's in 1520) [ClassicSimilarity], result of:
          0.06261403 = score(doc=1520,freq=1.0), product of:
            0.12080483 = queryWeight, product of:
              1.1360456 = boost
              9.47762 = idf(docFreq=8, maxDocs=43254)
              0.011219907 = queryNorm
            0.5183073 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.47762 = idf(docFreq=8, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.06497757 = weight(abstract_txt:saves in 1520) [ClassicSimilarity], result of:
          0.06497757 = score(doc=1520,freq=1.0), product of:
            0.123826094 = queryWeight, product of:
              1.1501638 = boost
              9.595404 = idf(docFreq=7, maxDocs=43254)
              0.011219907 = queryNorm
            0.5247486 = fieldWeight in 1520, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.595404 = idf(docFreq=7, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.03368036 = weight(abstract_txt:catalog in 1520) [ClassicSimilarity], result of:
          0.03368036 = score(doc=1520,freq=2.0), product of:
            0.0799014 = queryWeight, product of:
              1.3066094 = boost
              5.4502864 = idf(docFreq=504, maxDocs=43254)
              0.011219907 = queryNorm
            0.42152405 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.4502864 = idf(docFreq=504, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.011820299 = weight(abstract_txt:this in 1520) [ClassicSimilarity], result of:
          0.011820299 = score(doc=1520,freq=5.0), product of:
            0.03975473 = queryWeight, product of:
              1.4572464 = boost
              2.4314568 = idf(docFreq=10335, maxDocs=43254)
              0.011219907 = queryNorm
            0.29733062 = fieldWeight in 1520, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              2.4314568 = idf(docFreq=10335, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.06629891 = weight(abstract_txt:predict in 1520) [ClassicSimilarity], result of:
          0.06629891 = score(doc=1520,freq=2.0), product of:
            0.12549914 = queryWeight, product of:
              1.6375289 = boost
              6.830658 = idf(docFreq=126, maxDocs=43254)
              0.011219907 = queryNorm
            0.52828175 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              6.830658 = idf(docFreq=126, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.037114054 = weight(abstract_txt:methodology in 1520) [ClassicSimilarity], result of:
          0.037114054 = score(doc=1520,freq=3.0), product of:
            0.085243665 = queryWeight, product of:
              1.6528951 = boost
              4.5965033 = idf(docFreq=1185, maxDocs=43254)
              0.011219907 = queryNorm
            0.43538782 = fieldWeight in 1520, product of:
              1.7320508 = tf(freq=3.0), with freq of:
                3.0 = termFreq=3.0
              4.5965033 = idf(docFreq=1185, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.07141477 = weight(abstract_txt:regression in 1520) [ClassicSimilarity], result of:
          0.07141477 = score(doc=1520,freq=2.0), product of:
            0.13187481 = queryWeight, product of:
              1.678609 = boost
              7.002016 = idf(docFreq=106, maxDocs=43254)
              0.011219907 = queryNorm
            0.54153454 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.002016 = idf(docFreq=106, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.029303834 = weight(abstract_txt:user in 1520) [ClassicSimilarity], result of:
          0.029303834 = score(doc=1520,freq=4.0), product of:
            0.07282036 = queryWeight, product of:
              1.7640464 = boost
              3.6792014 = idf(docFreq=2967, maxDocs=43254)
              0.011219907 = queryNorm
            0.40241265 = fieldWeight in 1520, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.6792014 = idf(docFreq=2967, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.029392645 = weight(abstract_txt:were in 1520) [ClassicSimilarity], result of:
          0.029392645 = score(doc=1520,freq=4.0), product of:
            0.07296742 = queryWeight, product of:
              1.7658267 = boost
              3.6829145 = idf(docFreq=2956, maxDocs=43254)
              0.011219907 = queryNorm
            0.40281877 = fieldWeight in 1520, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.6829145 = idf(docFreq=2956, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.08832274 = weight(abstract_txt:demographic in 1520) [ClassicSimilarity], result of:
          0.08832274 = score(doc=1520,freq=2.0), product of:
            0.15194446 = queryWeight, product of:
              1.8018185 = boost
              7.515962 = idf(docFreq=63, maxDocs=43254)
              0.011219907 = queryNorm
            0.58128303 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.515962 = idf(docFreq=63, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.11019904 = weight(abstract_txt:ascertain in 1520) [ClassicSimilarity], result of:
          0.11019904 = score(doc=1520,freq=2.0), product of:
            0.17609826 = queryWeight, product of:
              1.9397516 = boost
              8.091326 = idf(docFreq=35, maxDocs=43254)
              0.011219907 = queryNorm
            0.62578154 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.091326 = idf(docFreq=35, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.06420504 = weight(abstract_txt:definition in 1520) [ClassicSimilarity], result of:
          0.06420504 = score(doc=1520,freq=3.0), product of:
            0.12284268 = queryWeight, product of:
              1.9842156 = boost
              5.517866 = idf(docFreq=471, maxDocs=43254)
              0.011219907 = queryNorm
            0.52266073 = fieldWeight in 1520, product of:
              1.7320508 = tf(freq=3.0), with freq of:
                3.0 = termFreq=3.0
              5.517866 = idf(docFreq=471, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.12078955 = weight(abstract_txt:coefficients in 1520) [ClassicSimilarity], result of:
          0.12078955 = score(doc=1520,freq=2.0), product of:
            0.1872073 = queryWeight, product of:
              2.0 = boost
              8.342641 = idf(docFreq=27, maxDocs=43254)
              0.011219907 = queryNorm
            0.6452182 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.342641 = idf(docFreq=27, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.03141219 = weight(abstract_txt:used in 1520) [ClassicSimilarity], result of:
          0.03141219 = score(doc=1520,freq=5.0), product of:
            0.07627262 = queryWeight, product of:
              2.018473 = boost
              3.3678792 = idf(docFreq=4051, maxDocs=43254)
              0.011219907 = queryNorm
            0.411841 = fieldWeight in 1520, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              3.3678792 = idf(docFreq=4051, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.059065044 = weight(abstract_txt:relevant in 1520) [ClassicSimilarity], result of:
          0.059065044 = score(doc=1520,freq=4.0), product of:
            0.11619574 = queryWeight, product of:
              2.2283258 = boost
              4.6475306 = idf(docFreq=1126, maxDocs=43254)
              0.011219907 = queryNorm
            0.50832367 = fieldWeight in 1520, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.6475306 = idf(docFreq=1126, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.09512181 = weight(abstract_txt:variables in 1520) [ClassicSimilarity], result of:
          0.09512181 = score(doc=1520,freq=3.0), product of:
            0.15964547 = queryWeight, product of:
              2.2619996 = boost
              6.29035 = idf(docFreq=217, maxDocs=43254)
              0.011219907 = queryNorm
            0.5958316 = fieldWeight in 1520, product of:
              1.7320508 = tf(freq=3.0), with freq of:
                3.0 = termFreq=3.0
              6.29035 = idf(docFreq=217, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.09871887 = weight(abstract_txt:relevance in 1520) [ClassicSimilarity], result of:
          0.09871887 = score(doc=1520,freq=5.0), product of:
            0.16364521 = queryWeight, product of:
              2.9565842 = boost
              4.933144 = idf(docFreq=846, maxDocs=43254)
              0.011219907 = queryNorm
            0.6032494 = fieldWeight in 1520, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.933144 = idf(docFreq=846, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.25510097 = weight(abstract_txt:session in 1520) [ClassicSimilarity], result of:
          0.25510097 = score(doc=1520,freq=5.0), product of:
            0.30816117 = queryWeight, product of:
              4.0572104 = boost
              6.7695704 = idf(docFreq=134, maxDocs=43254)
              0.011219907 = queryNorm
            0.82781667 = fieldWeight in 1520, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              6.7695704 = idf(docFreq=134, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.413179 = weight(abstract_txt:sessions in 1520) [ClassicSimilarity], result of:
          0.413179 = score(doc=1520,freq=7.0), product of:
            0.4250063 = queryWeight, product of:
              5.6376786 = boost
              6.719018 = idf(docFreq=141, maxDocs=43254)
              0.011219907 = queryNorm
            0.9721715 = fieldWeight in 1520, product of:
              2.6457512 = tf(freq=7.0), with freq of:
                7.0 = termFreq=7.0
              6.719018 = idf(docFreq=141, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
        0.75722456 = weight(abstract_txt:strata in 1520) [ClassicSimilarity], result of:
          0.75722456 = score(doc=1520,freq=5.0), product of:
            0.6364823 = queryWeight, product of:
              5.8308487 = boost
              9.728935 = idf(docFreq=6, maxDocs=43254)
              0.011219907 = queryNorm
            1.1897025 = fieldWeight in 1520, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              9.728935 = idf(docFreq=6, maxDocs=43254)
              0.0546875 = fieldNorm(doc=1520)
    
  2. Chen, H.-M.; Cooper, M.D.: Using clustering techniques to detect usage patterns in a Web-based information system (2001) 0.36
    0.35658938 = sum of:
      0.35658938 = product of:
        0.8104304 = sum of:
          0.07155889 = weight(abstract_txt:california's in 1527) [ClassicSimilarity], result of:
            0.07155889 = score(doc=1527,freq=1.0), product of:
              0.12080483 = queryWeight, product of:
                1.1360456 = boost
                9.47762 = idf(docFreq=8, maxDocs=43254)
                0.011219907 = queryNorm
              0.59235126 = fieldWeight in 1527, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.47762 = idf(docFreq=8, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.027217845 = weight(abstract_txt:catalog in 1527) [ClassicSimilarity], result of:
            0.027217845 = score(doc=1527,freq=1.0), product of:
              0.0799014 = queryWeight, product of:
                1.3066094 = boost
                5.4502864 = idf(docFreq=504, maxDocs=43254)
                0.011219907 = queryNorm
              0.3406429 = fieldWeight in 1527, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4502864 = idf(docFreq=504, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.008543787 = weight(abstract_txt:this in 1527) [ClassicSimilarity], result of:
            0.008543787 = score(doc=1527,freq=2.0), product of:
              0.03975473 = queryWeight, product of:
                1.4572464 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.011219907 = queryNorm
              0.21491244 = fieldWeight in 1527, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.034632567 = weight(abstract_txt:methodology in 1527) [ClassicSimilarity], result of:
            0.034632567 = score(doc=1527,freq=2.0), product of:
              0.085243665 = queryWeight, product of:
                1.6528951 = boost
                4.5965033 = idf(docFreq=1185, maxDocs=43254)
                0.011219907 = queryNorm
              0.40627733 = fieldWeight in 1527, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5965033 = idf(docFreq=1185, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.023681074 = weight(abstract_txt:user in 1527) [ClassicSimilarity], result of:
            0.023681074 = score(doc=1527,freq=2.0), product of:
              0.07282036 = queryWeight, product of:
                1.7640464 = boost
                3.6792014 = idf(docFreq=2967, maxDocs=43254)
                0.011219907 = queryNorm
              0.32519853 = fieldWeight in 1527, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6792014 = idf(docFreq=2967, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.029091174 = weight(abstract_txt:were in 1527) [ClassicSimilarity], result of:
            0.029091174 = score(doc=1527,freq=3.0), product of:
              0.07296742 = queryWeight, product of:
                1.7658267 = boost
                3.6829145 = idf(docFreq=2956, maxDocs=43254)
                0.011219907 = queryNorm
              0.39868718 = fieldWeight in 1527, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6829145 = idf(docFreq=2956, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.07137555 = weight(abstract_txt:demographic in 1527) [ClassicSimilarity], result of:
            0.07137555 = score(doc=1527,freq=1.0), product of:
              0.15194446 = queryWeight, product of:
                1.8018185 = boost
                7.515962 = idf(docFreq=63, maxDocs=43254)
                0.011219907 = queryNorm
              0.46974763 = fieldWeight in 1527, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.515962 = idf(docFreq=63, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.016054811 = weight(abstract_txt:used in 1527) [ClassicSimilarity], result of:
            0.016054811 = score(doc=1527,freq=1.0), product of:
              0.07627262 = queryWeight, product of:
                2.018473 = boost
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.011219907 = queryNorm
              0.21049245 = fieldWeight in 1527, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.08876186 = weight(abstract_txt:variables in 1527) [ClassicSimilarity], result of:
            0.08876186 = score(doc=1527,freq=2.0), product of:
              0.15964547 = queryWeight, product of:
                2.2619996 = boost
                6.29035 = idf(docFreq=217, maxDocs=43254)
                0.011219907 = queryNorm
              0.5559936 = fieldWeight in 1527, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.29035 = idf(docFreq=217, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.13038242 = weight(abstract_txt:session in 1527) [ClassicSimilarity], result of:
            0.13038242 = score(doc=1527,freq=1.0), product of:
              0.30816117 = queryWeight, product of:
                4.0572104 = boost
                6.7695704 = idf(docFreq=134, maxDocs=43254)
                0.011219907 = queryNorm
              0.42309815 = fieldWeight in 1527, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.7695704 = idf(docFreq=134, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
          0.30913046 = weight(abstract_txt:sessions in 1527) [ClassicSimilarity], result of:
            0.30913046 = score(doc=1527,freq=3.0), product of:
              0.4250063 = queryWeight, product of:
                5.6376786 = boost
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.011219907 = queryNorm
              0.727355 = fieldWeight in 1527, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.0625 = fieldNorm(doc=1527)
        0.44 = coord(11/25)
    
  3. Large, A.; Beheshti, J.; Moukdad, H.: Information seeking on the Web : navigational skills of grade-six primary school students (1999) 0.16
    0.16409369 = sum of:
      0.16409369 = product of:
        0.51279277 = sum of:
          0.008543787 = weight(abstract_txt:this in 1546) [ClassicSimilarity], result of:
            0.008543787 = score(doc=1546,freq=2.0), product of:
              0.03975473 = queryWeight, product of:
                1.4572464 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.011219907 = queryNorm
              0.21491244 = fieldWeight in 1546, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.023752844 = weight(abstract_txt:were in 1546) [ClassicSimilarity], result of:
            0.023752844 = score(doc=1546,freq=2.0), product of:
              0.07296742 = queryWeight, product of:
                1.7658267 = boost
                3.6829145 = idf(docFreq=2956, maxDocs=43254)
                0.011219907 = queryNorm
              0.3255267 = fieldWeight in 1546, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6829145 = idf(docFreq=2956, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.07137555 = weight(abstract_txt:demographic in 1546) [ClassicSimilarity], result of:
            0.07137555 = score(doc=1546,freq=1.0), product of:
              0.15194446 = queryWeight, product of:
                1.8018185 = boost
                7.515962 = idf(docFreq=63, maxDocs=43254)
                0.011219907 = queryNorm
              0.46974763 = fieldWeight in 1546, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.515962 = idf(docFreq=63, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.016054811 = weight(abstract_txt:used in 1546) [ClassicSimilarity], result of:
            0.016054811 = score(doc=1546,freq=1.0), product of:
              0.07627262 = queryWeight, product of:
                2.018473 = boost
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.011219907 = queryNorm
              0.21049245 = fieldWeight in 1546, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.033751454 = weight(abstract_txt:relevant in 1546) [ClassicSimilarity], result of:
            0.033751454 = score(doc=1546,freq=1.0), product of:
              0.11619574 = queryWeight, product of:
                2.2283258 = boost
                4.6475306 = idf(docFreq=1126, maxDocs=43254)
                0.011219907 = queryNorm
              0.29047066 = fieldWeight in 1546, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6475306 = idf(docFreq=1126, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.050455336 = weight(abstract_txt:relevance in 1546) [ClassicSimilarity], result of:
            0.050455336 = score(doc=1546,freq=1.0), product of:
              0.16364521 = queryWeight, product of:
                2.9565842 = boost
                4.933144 = idf(docFreq=846, maxDocs=43254)
                0.011219907 = queryNorm
              0.3083215 = fieldWeight in 1546, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.933144 = idf(docFreq=846, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.13038242 = weight(abstract_txt:session in 1546) [ClassicSimilarity], result of:
            0.13038242 = score(doc=1546,freq=1.0), product of:
              0.30816117 = queryWeight, product of:
                4.0572104 = boost
                6.7695704 = idf(docFreq=134, maxDocs=43254)
                0.011219907 = queryNorm
              0.42309815 = fieldWeight in 1546, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.7695704 = idf(docFreq=134, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
          0.17847656 = weight(abstract_txt:sessions in 1546) [ClassicSimilarity], result of:
            0.17847656 = score(doc=1546,freq=1.0), product of:
              0.4250063 = queryWeight, product of:
                5.6376786 = boost
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.011219907 = queryNorm
              0.41993862 = fieldWeight in 1546, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.0625 = fieldNorm(doc=1546)
        0.32 = coord(8/25)
    
  4. Jung, S.; Herlocker, J.L.; Webster, J.: Click data as implicit relevance feedback in web search (2007) 0.16
    0.16384256 = sum of:
      0.16384256 = product of:
        0.585152 = sum of:
          0.007475813 = weight(abstract_txt:this in 2913) [ClassicSimilarity], result of:
            0.007475813 = score(doc=2913,freq=2.0), product of:
              0.03975473 = queryWeight, product of:
                1.4572464 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.011219907 = queryNorm
              0.18804839 = fieldWeight in 2913, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
          0.020720938 = weight(abstract_txt:user in 2913) [ClassicSimilarity], result of:
            0.020720938 = score(doc=2913,freq=2.0), product of:
              0.07282036 = queryWeight, product of:
                1.7640464 = boost
                3.6792014 = idf(docFreq=2967, maxDocs=43254)
                0.011219907 = queryNorm
              0.2845487 = fieldWeight in 2913, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6792014 = idf(docFreq=2967, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
          0.014047959 = weight(abstract_txt:used in 2913) [ClassicSimilarity], result of:
            0.014047959 = score(doc=2913,freq=1.0), product of:
              0.07627262 = queryWeight, product of:
                2.018473 = boost
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.011219907 = queryNorm
              0.18418089 = fieldWeight in 2913, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
          0.04176529 = weight(abstract_txt:relevant in 2913) [ClassicSimilarity], result of:
            0.04176529 = score(doc=2913,freq=2.0), product of:
              0.11619574 = queryWeight, product of:
                2.2283258 = boost
                4.6475306 = idf(docFreq=1126, maxDocs=43254)
                0.011219907 = queryNorm
              0.3594391 = fieldWeight in 2913, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.6475306 = idf(docFreq=1126, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
          0.11680574 = weight(abstract_txt:relevance in 2913) [ClassicSimilarity], result of:
            0.11680574 = score(doc=2913,freq=7.0), product of:
              0.16364521 = queryWeight, product of:
                2.9565842 = boost
                4.933144 = idf(docFreq=846, maxDocs=43254)
                0.011219907 = queryNorm
              0.71377426 = fieldWeight in 2913, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                4.933144 = idf(docFreq=846, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
          0.22816923 = weight(abstract_txt:session in 2913) [ClassicSimilarity], result of:
            0.22816923 = score(doc=2913,freq=4.0), product of:
              0.30816117 = queryWeight, product of:
                4.0572104 = boost
                6.7695704 = idf(docFreq=134, maxDocs=43254)
                0.011219907 = queryNorm
              0.7404218 = fieldWeight in 2913, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.7695704 = idf(docFreq=134, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
          0.156167 = weight(abstract_txt:sessions in 2913) [ClassicSimilarity], result of:
            0.156167 = score(doc=2913,freq=1.0), product of:
              0.4250063 = queryWeight, product of:
                5.6376786 = boost
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.011219907 = queryNorm
              0.3674463 = fieldWeight in 2913, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.0546875 = fieldNorm(doc=2913)
        0.28 = coord(7/25)
    
  5. Chen, H.-M.; Cooper, M.D.: Stochastic modeling of usage patterns in a Web-based information system (2002) 0.16
    0.15514311 = sum of:
      0.15514311 = product of:
        0.4309531 = sum of:
          0.053669173 = weight(abstract_txt:california's in 2578) [ClassicSimilarity], result of:
            0.053669173 = score(doc=2578,freq=1.0), product of:
              0.12080483 = queryWeight, product of:
                1.1360456 = boost
                9.47762 = idf(docFreq=8, maxDocs=43254)
                0.011219907 = queryNorm
              0.44426346 = fieldWeight in 2578, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.47762 = idf(docFreq=8, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.020413382 = weight(abstract_txt:catalog in 2578) [ClassicSimilarity], result of:
            0.020413382 = score(doc=2578,freq=1.0), product of:
              0.0799014 = queryWeight, product of:
                1.3066094 = boost
                5.4502864 = idf(docFreq=504, maxDocs=43254)
                0.011219907 = queryNorm
              0.25548217 = fieldWeight in 2578, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4502864 = idf(docFreq=504, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.0045310273 = weight(abstract_txt:this in 2578) [ClassicSimilarity], result of:
            0.0045310273 = score(doc=2578,freq=1.0), product of:
              0.03975473 = queryWeight, product of:
                1.4572464 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.011219907 = queryNorm
              0.11397454 = fieldWeight in 2578, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.040183205 = weight(abstract_txt:predict in 2578) [ClassicSimilarity], result of:
            0.040183205 = score(doc=2578,freq=1.0), product of:
              0.12549914 = queryWeight, product of:
                1.6375289 = boost
                6.830658 = idf(docFreq=126, maxDocs=43254)
                0.011219907 = queryNorm
              0.3201871 = fieldWeight in 2578, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.830658 = idf(docFreq=126, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.018366693 = weight(abstract_txt:methodology in 2578) [ClassicSimilarity], result of:
            0.018366693 = score(doc=2578,freq=1.0), product of:
              0.085243665 = queryWeight, product of:
                1.6528951 = boost
                4.5965033 = idf(docFreq=1185, maxDocs=43254)
                0.011219907 = queryNorm
              0.21546109 = fieldWeight in 2578, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5965033 = idf(docFreq=1185, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.028082302 = weight(abstract_txt:user in 2578) [ClassicSimilarity], result of:
            0.028082302 = score(doc=2578,freq=5.0), product of:
              0.07282036 = queryWeight, product of:
                1.7640464 = boost
                3.6792014 = idf(docFreq=2967, maxDocs=43254)
                0.011219907 = queryNorm
              0.38563806 = fieldWeight in 2578, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.6792014 = idf(docFreq=2967, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.021818383 = weight(abstract_txt:were in 2578) [ClassicSimilarity], result of:
            0.021818383 = score(doc=2578,freq=3.0), product of:
              0.07296742 = queryWeight, product of:
                1.7658267 = boost
                3.6829145 = idf(docFreq=2956, maxDocs=43254)
                0.011219907 = queryNorm
              0.2990154 = fieldWeight in 2578, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6829145 = idf(docFreq=2956, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.012041109 = weight(abstract_txt:used in 2578) [ClassicSimilarity], result of:
            0.012041109 = score(doc=2578,freq=1.0), product of:
              0.07627262 = queryWeight, product of:
                2.018473 = boost
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.011219907 = queryNorm
              0.15786934 = fieldWeight in 2578, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.3678792 = idf(docFreq=4051, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
          0.23184784 = weight(abstract_txt:sessions in 2578) [ClassicSimilarity], result of:
            0.23184784 = score(doc=2578,freq=3.0), product of:
              0.4250063 = queryWeight, product of:
                5.6376786 = boost
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.011219907 = queryNorm
              0.54551625 = fieldWeight in 2578, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.046875 = fieldNorm(doc=2578)
        0.36 = coord(9/25)