Document (#1105)

Author

Larson, R.R.

Title

¬The decline of subject searching : long-term trends and patterns of index use in an online catalog

Source

Journal of the American Society for Information Science. 42(1991), S.197-215

Year

1991

Abstract

Search index usage in a large university online catalog system over a six-year period (representing about 15,3 million searches) was investigated using transaction monitor data. Mathematical models of trends and patterns in the data were developed and tested using regression techniques. The results of the analyses show a consistent decline in the frequency of subject index use by online catalog users, with a corresponding increase in the frequency of title keyword searching. Significant annual patterns in index usage were also identified. Analysis of the transaction data, and related previous studies of online catalog users, suggest a number of factors contributing to the decline in subject search frequency. Chief among these factors are user difficulties in formulating subject queries with LCSH, leading to search failure, and the problem of "information overload" as database size increases. This article presents the models and results of the transaction log analysis, discusses the underlying problems with subject searching contributing to the observed decline, and reviews some proposed improvements to online catalog systems to aid in overcoming these problems

Theme

OPAC
Benutzerstudien

Similar documents (author)

1. Larson, R.R.: Between Scylla and Charybdis : searching in the online catalog (1991) 5.21

   5.2066784 = sum of:
     5.2066784 = weight(author_txt:larson in 462) [ClassicSimilarity], result of:
       5.2066784 = fieldWeight in 462, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.330686 = idf(docFreq=27, maxDocs=42740)
         0.625 = fieldNorm(doc=462)
   

2. Larson, R.R.: Evaluation of advanced retrieval techniques in an experimental online catalog (1992) 5.21

   5.2066784 = sum of:
     5.2066784 = weight(author_txt:larson in 481) [ClassicSimilarity], result of:
       5.2066784 = fieldWeight in 481, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.330686 = idf(docFreq=27, maxDocs=42740)
         0.625 = fieldNorm(doc=481)
   

3. Larson, R.R.: Experiments in automatic Library of Congress Classification (1992) 5.21

   5.2066784 = sum of:
     5.2066784 = weight(author_txt:larson in 1054) [ClassicSimilarity], result of:
       5.2066784 = fieldWeight in 1054, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.330686 = idf(docFreq=27, maxDocs=42740)
         0.625 = fieldNorm(doc=1054)
   

4. Larson, R.R.: Classification clustering, probabilistic information retrieval, and the online catalog (1991) 5.21

   5.2066784 = sum of:
     5.2066784 = weight(author_txt:larson in 1070) [ClassicSimilarity], result of:
       5.2066784 = fieldWeight in 1070, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.330686 = idf(docFreq=27, maxDocs=42740)
         0.625 = fieldNorm(doc=1070)
   

5. Larson, R.R.: Users look at online catalogs : Pt.2: interacting with online catalogs. Final report for the Council on Library Resources (1983) 5.21

   5.2066784 = sum of:
     5.2066784 = weight(author_txt:larson in 2424) [ClassicSimilarity], result of:
       5.2066784 = fieldWeight in 2424, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.330686 = idf(docFreq=27, maxDocs=42740)
         0.625 = fieldNorm(doc=2424)
   

Similar documents (content)

1. Hunter, R.N.: Successes and failures of patrons searching the online catalog at a large academic library : a transaction log analysis (1991) 0.62

   0.6168677 = sum of:
     0.6168677 = product of:
       1.1862841 = sum of:
         0.019851582 = weight(abstract_txt:users in 489) [ClassicSimilarity], result of:
           0.019851582 = score(doc=489,freq=1.0), product of:
             0.05925213 = queryWeight, product of:
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.016579984 = queryNorm
             0.33503574 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.02182401 = weight(abstract_txt:analysis in 489) [ClassicSimilarity], result of:
           0.02182401 = score(doc=489,freq=1.0), product of:
             0.06311466 = queryWeight, product of:
               1.0320795 = boost
               3.6883576 = idf(docFreq=2905, maxDocs=42740)
               0.016579984 = queryNorm
             0.34578353 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6883576 = idf(docFreq=2905, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.030959113 = weight(abstract_txt:were in 489) [ClassicSimilarity], result of:
           0.030959113 = score(doc=489,freq=2.0), product of:
             0.06324452 = queryWeight, product of:
               1.0331407 = boost
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.016579984 = queryNorm
             0.48951453 = fieldWeight in 489, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.048676696 = weight(abstract_txt:problems in 489) [ClassicSimilarity], result of:
           0.048676696 = score(doc=489,freq=2.0), product of:
             0.085515454 = queryWeight, product of:
               1.2013521 = boost
               4.2932897 = idf(docFreq=1586, maxDocs=42740)
               0.016579984 = queryNorm
             0.5692152 = fieldWeight in 489, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.2932897 = idf(docFreq=1586, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.025010927 = weight(abstract_txt:data in 489) [ClassicSimilarity], result of:
           0.025010927 = score(doc=489,freq=1.0), product of:
             0.07912083 = queryWeight, product of:
               1.4152691 = boost
               3.3718455 = idf(docFreq=3987, maxDocs=42740)
               0.016579984 = queryNorm
             0.31611052 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3718455 = idf(docFreq=3987, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.03176533 = weight(abstract_txt:search in 489) [ClassicSimilarity], result of:
           0.03176533 = score(doc=489,freq=1.0), product of:
             0.09279115 = queryWeight, product of:
               1.532664 = boost
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.016579984 = queryNorm
             0.34233147 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.07892679 = weight(abstract_txt:usage in 489) [ClassicSimilarity], result of:
           0.07892679 = score(doc=489,freq=1.0), product of:
             0.14870429 = queryWeight, product of:
               1.5841991 = boost
               5.6614757 = idf(docFreq=403, maxDocs=42740)
               0.016579984 = queryNorm
             0.5307633 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6614757 = idf(docFreq=403, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.087840416 = weight(abstract_txt:searching in 489) [ClassicSimilarity], result of:
           0.087840416 = score(doc=489,freq=3.0), product of:
             0.12675355 = queryWeight, product of:
               1.7913222 = boost
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.016579984 = queryNorm
             0.6930016 = fieldWeight in 489, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.09769547 = weight(abstract_txt:patterns in 489) [ClassicSimilarity], result of:
           0.09769547 = score(doc=489,freq=1.0), product of:
             0.19623987 = queryWeight, product of:
               2.228883 = boost
               5.3102612 = idf(docFreq=573, maxDocs=42740)
               0.016579984 = queryNorm
             0.497837 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3102612 = idf(docFreq=573, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.07636822 = weight(abstract_txt:online in 489) [ClassicSimilarity], result of:
           0.07636822 = score(doc=489,freq=2.0), product of:
             0.15670602 = queryWeight, product of:
               2.571348 = boost
               3.6757057 = idf(docFreq=2942, maxDocs=42740)
               0.016579984 = queryNorm
             0.4873343 = fieldWeight in 489, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6757057 = idf(docFreq=2942, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.06500514 = weight(abstract_txt:subject in 489) [ClassicSimilarity], result of:
           0.06500514 = score(doc=489,freq=1.0), product of:
             0.17733142 = queryWeight, product of:
               2.735337 = boost
               3.9101257 = idf(docFreq=2327, maxDocs=42740)
               0.016579984 = queryNorm
             0.3665743 = fieldWeight in 489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9101257 = idf(docFreq=2327, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.35338977 = weight(abstract_txt:transaction in 489) [ClassicSimilarity], result of:
           0.35338977 = score(doc=489,freq=3.0), product of:
             0.32062685 = queryWeight, product of:
               2.8490074 = boost
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.016579984 = queryNorm
             1.1021839 = fieldWeight in 489, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
         0.24897057 = weight(abstract_txt:catalog in 489) [ClassicSimilarity], result of:
           0.24897057 = score(doc=489,freq=2.0), product of:
             0.34454232 = queryWeight, product of:
               3.8127584 = boost
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.016579984 = queryNorm
             0.72261244 = fieldWeight in 489, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.09375 = fieldNorm(doc=489)
       0.52 = coord(13/25)
   

2. Markey, K.: Searching and browsing the Dewey Decimal Classification in an online catalog (1987) 0.28

   0.27988708 = sum of:
     0.27988708 = product of:
       0.6997177 = sum of:
         0.018716251 = weight(abstract_txt:users in 1510) [ClassicSimilarity], result of:
           0.018716251 = score(doc=1510,freq=2.0), product of:
             0.05925213 = queryWeight, product of:
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.016579984 = queryNorm
             0.31587473 = fieldWeight in 1510, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.020639408 = weight(abstract_txt:were in 1510) [ClassicSimilarity], result of:
           0.020639408 = score(doc=1510,freq=2.0), product of:
             0.06324452 = queryWeight, product of:
               1.0331407 = boost
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.016579984 = queryNorm
             0.32634303 = fieldWeight in 1510, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.00981572 = weight(abstract_txt:with in 1510) [ClassicSimilarity], result of:
           0.00981572 = score(doc=1510,freq=2.0), product of:
             0.04410995 = queryWeight, product of:
               1.0567249 = boost
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.016579984 = queryNorm
             0.22252847 = fieldWeight in 1510, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.01667395 = weight(abstract_txt:data in 1510) [ClassicSimilarity], result of:
           0.01667395 = score(doc=1510,freq=1.0), product of:
             0.07912083 = queryWeight, product of:
               1.4152691 = boost
               3.3718455 = idf(docFreq=3987, maxDocs=42740)
               0.016579984 = queryNorm
             0.21074034 = fieldWeight in 1510, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3718455 = idf(docFreq=3987, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.036679443 = weight(abstract_txt:search in 1510) [ClassicSimilarity], result of:
           0.036679443 = score(doc=1510,freq=3.0), product of:
             0.09279115 = queryWeight, product of:
               1.532664 = boost
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.016579984 = queryNorm
             0.39529032 = fieldWeight in 1510, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.033809792 = weight(abstract_txt:searching in 1510) [ClassicSimilarity], result of:
           0.033809792 = score(doc=1510,freq=1.0), product of:
             0.12675355 = queryWeight, product of:
               1.7913222 = boost
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.016579984 = queryNorm
             0.26673645 = fieldWeight in 1510, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.12470879 = weight(abstract_txt:online in 1510) [ClassicSimilarity], result of:
           0.12470879 = score(doc=1510,freq=12.0), product of:
             0.15670602 = queryWeight, product of:
               2.571348 = boost
               3.6757057 = idf(docFreq=2942, maxDocs=42740)
               0.016579984 = queryNorm
             0.7958136 = fieldWeight in 1510, product of:
               3.4641016 = tf(freq=12.0), with freq of:
                 12.0 = termFreq=12.0
               3.6757057 = idf(docFreq=2942, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.06157801 = weight(abstract_txt:index in 1510) [ClassicSimilarity], result of:
           0.06157801 = score(doc=1510,freq=1.0), product of:
             0.20806314 = queryWeight, product of:
               2.6500897 = boost
               4.7353325 = idf(docFreq=1019, maxDocs=42740)
               0.016579984 = queryNorm
             0.29595828 = fieldWeight in 1510, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7353325 = idf(docFreq=1019, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.11465828 = weight(abstract_txt:subject in 1510) [ClassicSimilarity], result of:
           0.11465828 = score(doc=1510,freq=7.0), product of:
             0.17733142 = queryWeight, product of:
               2.735337 = boost
               3.9101257 = idf(docFreq=2327, maxDocs=42740)
               0.016579984 = queryNorm
             0.6465762 = fieldWeight in 1510, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.9101257 = idf(docFreq=2327, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
         0.26243806 = weight(abstract_txt:catalog in 1510) [ClassicSimilarity], result of:
           0.26243806 = score(doc=1510,freq=5.0), product of:
             0.34454232 = queryWeight, product of:
               3.8127584 = boost
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.016579984 = queryNorm
             0.76170045 = fieldWeight in 1510, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.0625 = fieldNorm(doc=1510)
       0.4 = coord(10/25)
   

3. Peters, T.A.; Kurth, M.: Controlled and uncontrolled vocabulary subject searching in an academic library online catalog (1991) 0.27

   0.2678182 = sum of:
     0.2678182 = product of:
       0.74393946 = sum of:
         0.019851582 = weight(abstract_txt:users in 2348) [ClassicSimilarity], result of:
           0.019851582 = score(doc=2348,freq=1.0), product of:
             0.05925213 = queryWeight, product of:
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.016579984 = queryNorm
             0.33503574 = fieldWeight in 2348, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.02182401 = weight(abstract_txt:analysis in 2348) [ClassicSimilarity], result of:
           0.02182401 = score(doc=2348,freq=1.0), product of:
             0.06311466 = queryWeight, product of:
               1.0320795 = boost
               3.6883576 = idf(docFreq=2905, maxDocs=42740)
               0.016579984 = queryNorm
             0.34578353 = fieldWeight in 2348, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6883576 = idf(docFreq=2905, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.0218914 = weight(abstract_txt:were in 2348) [ClassicSimilarity], result of:
           0.0218914 = score(doc=2348,freq=1.0), product of:
             0.06324452 = queryWeight, product of:
               1.0331407 = boost
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.016579984 = queryNorm
             0.34613907 = fieldWeight in 2348, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.010411143 = weight(abstract_txt:with in 2348) [ClassicSimilarity], result of:
           0.010411143 = score(doc=2348,freq=1.0), product of:
             0.04410995 = queryWeight, product of:
               1.0567249 = boost
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.016579984 = queryNorm
             0.23602709 = fieldWeight in 2348, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.07102944 = weight(abstract_txt:search in 2348) [ClassicSimilarity], result of:
           0.07102944 = score(doc=2348,freq=5.0), product of:
             0.09279115 = queryWeight, product of:
               1.532664 = boost
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.016579984 = queryNorm
             0.76547647 = fieldWeight in 2348, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.054000486 = weight(abstract_txt:online in 2348) [ClassicSimilarity], result of:
           0.054000486 = score(doc=2348,freq=1.0), product of:
             0.15670602 = queryWeight, product of:
               2.571348 = boost
               3.6757057 = idf(docFreq=2942, maxDocs=42740)
               0.016579984 = queryNorm
             0.3445974 = fieldWeight in 2348, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6757057 = idf(docFreq=2942, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.09193115 = weight(abstract_txt:subject in 2348) [ClassicSimilarity], result of:
           0.09193115 = score(doc=2348,freq=2.0), product of:
             0.17733142 = queryWeight, product of:
               2.735337 = boost
               3.9101257 = idf(docFreq=2327, maxDocs=42740)
               0.016579984 = queryNorm
             0.5184143 = fieldWeight in 2348, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9101257 = idf(docFreq=2327, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.2040297 = weight(abstract_txt:transaction in 2348) [ClassicSimilarity], result of:
           0.2040297 = score(doc=2348,freq=1.0), product of:
             0.32062685 = queryWeight, product of:
               2.8490074 = boost
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.016579984 = queryNorm
             0.6363462 = fieldWeight in 2348, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
         0.24897057 = weight(abstract_txt:catalog in 2348) [ClassicSimilarity], result of:
           0.24897057 = score(doc=2348,freq=2.0), product of:
             0.34454232 = queryWeight, product of:
               3.8127584 = boost
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.016579984 = queryNorm
             0.72261244 = fieldWeight in 2348, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.09375 = fieldNorm(doc=2348)
       0.36 = coord(9/25)
   

4. Chen, H.-M.; Cooper, M.D.: Stochastic modeling of usage patterns in a Web-based information system (2002) 0.26

   0.26001668 = sum of:
     0.26001668 = product of:
       0.590947 = sum of:
         0.009925791 = weight(abstract_txt:users in 1578) [ClassicSimilarity], result of:
           0.009925791 = score(doc=1578,freq=1.0), product of:
             0.05925213 = queryWeight, product of:
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.016579984 = queryNorm
             0.16751787 = fieldWeight in 1578, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.018958509 = weight(abstract_txt:were in 1578) [ClassicSimilarity], result of:
           0.018958509 = score(doc=1578,freq=3.0), product of:
             0.06324452 = queryWeight, product of:
               1.0331407 = boost
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.016579984 = queryNorm
             0.29976523 = fieldWeight in 1578, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.010411143 = weight(abstract_txt:with in 1578) [ClassicSimilarity], result of:
           0.010411143 = score(doc=1578,freq=4.0), product of:
             0.04410995 = queryWeight, product of:
               1.0567249 = boost
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.016579984 = queryNorm
             0.23602709 = fieldWeight in 1578, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.022465916 = weight(abstract_txt:models in 1578) [ClassicSimilarity], result of:
           0.022465916 = score(doc=1578,freq=1.0), product of:
             0.102143325 = queryWeight, product of:
               1.3129646 = boost
               4.6921606 = idf(docFreq=1064, maxDocs=42740)
               0.016579984 = queryNorm
             0.21994503 = fieldWeight in 1578, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6921606 = idf(docFreq=1064, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.04202158 = weight(abstract_txt:search in 1578) [ClassicSimilarity], result of:
           0.04202158 = score(doc=1578,freq=7.0), product of:
             0.09279115 = queryWeight, product of:
               1.532664 = boost
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.016579984 = queryNorm
             0.45286193 = fieldWeight in 1578, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.096665174 = weight(abstract_txt:usage in 1578) [ClassicSimilarity], result of:
           0.096665174 = score(doc=1578,freq=6.0), product of:
             0.14870429 = queryWeight, product of:
               1.5841991 = boost
               5.6614757 = idf(docFreq=403, maxDocs=42740)
               0.016579984 = queryNorm
             0.6500497 = fieldWeight in 1578, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.6614757 = idf(docFreq=403, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.0358607 = weight(abstract_txt:searching in 1578) [ClassicSimilarity], result of:
           0.0358607 = score(doc=1578,freq=2.0), product of:
             0.12675355 = queryWeight, product of:
               1.7913222 = boost
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.016579984 = queryNorm
             0.28291672 = fieldWeight in 1578, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.08460675 = weight(abstract_txt:patterns in 1578) [ClassicSimilarity], result of:
           0.08460675 = score(doc=1578,freq=3.0), product of:
             0.19623987 = queryWeight, product of:
               2.228883 = boost
               5.3102612 = idf(docFreq=573, maxDocs=42740)
               0.016579984 = queryNorm
             0.43113947 = fieldWeight in 1578, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.3102612 = idf(docFreq=573, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.07999218 = weight(abstract_txt:index in 1578) [ClassicSimilarity], result of:
           0.07999218 = score(doc=1578,freq=3.0), product of:
             0.20806314 = queryWeight, product of:
               2.6500897 = boost
               4.7353325 = idf(docFreq=1019, maxDocs=42740)
               0.016579984 = queryNorm
             0.3844611 = fieldWeight in 1578, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7353325 = idf(docFreq=1019, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.10201485 = weight(abstract_txt:transaction in 1578) [ClassicSimilarity], result of:
           0.10201485 = score(doc=1578,freq=1.0), product of:
             0.32062685 = queryWeight, product of:
               2.8490074 = boost
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.016579984 = queryNorm
             0.3181731 = fieldWeight in 1578, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
         0.088024385 = weight(abstract_txt:catalog in 1578) [ClassicSimilarity], result of:
           0.088024385 = score(doc=1578,freq=1.0), product of:
             0.34454232 = queryWeight, product of:
               3.8127584 = boost
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.016579984 = queryNorm
             0.25548208 = fieldWeight in 1578, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.046875 = fieldNorm(doc=1578)
       0.44 = coord(11/25)
   

5. Chen, H.-M.; Cooper, M.D.: Using clustering techniques to detect usage patterns in a Web-based information system (2001) 0.25

   0.25150436 = sum of:
     0.25150436 = product of:
       0.57160085 = sum of:
         0.013234388 = weight(abstract_txt:users in 527) [ClassicSimilarity], result of:
           0.013234388 = score(doc=527,freq=1.0), product of:
             0.05925213 = queryWeight, product of:
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.016579984 = queryNorm
             0.22335717 = fieldWeight in 527, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.5737147 = idf(docFreq=3258, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.020575872 = weight(abstract_txt:analysis in 527) [ClassicSimilarity], result of:
           0.020575872 = score(doc=527,freq=2.0), product of:
             0.06311466 = queryWeight, product of:
               1.0320795 = boost
               3.6883576 = idf(docFreq=2905, maxDocs=42740)
               0.016579984 = queryNorm
             0.3260078 = fieldWeight in 527, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6883576 = idf(docFreq=2905, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.025278011 = weight(abstract_txt:were in 527) [ClassicSimilarity], result of:
           0.025278011 = score(doc=527,freq=3.0), product of:
             0.06324452 = queryWeight, product of:
               1.0331407 = boost
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.016579984 = queryNorm
             0.39968696 = fieldWeight in 527, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.69215 = idf(docFreq=2894, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.006940762 = weight(abstract_txt:with in 527) [ClassicSimilarity], result of:
           0.006940762 = score(doc=527,freq=1.0), product of:
             0.04410995 = queryWeight, product of:
               1.0567249 = boost
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.016579984 = queryNorm
             0.15735139 = fieldWeight in 527, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.5176222 = idf(docFreq=9369, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.01667395 = weight(abstract_txt:data in 527) [ClassicSimilarity], result of:
           0.01667395 = score(doc=527,freq=1.0), product of:
             0.07912083 = queryWeight, product of:
               1.4152691 = boost
               3.3718455 = idf(docFreq=3987, maxDocs=42740)
               0.016579984 = queryNorm
             0.21074034 = fieldWeight in 527, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3718455 = idf(docFreq=3987, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.021176886 = weight(abstract_txt:search in 527) [ClassicSimilarity], result of:
           0.021176886 = score(doc=527,freq=1.0), product of:
             0.09279115 = queryWeight, product of:
               1.532664 = boost
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.016579984 = queryNorm
             0.22822097 = fieldWeight in 527, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6515355 = idf(docFreq=3014, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.07441289 = weight(abstract_txt:usage in 527) [ClassicSimilarity], result of:
           0.07441289 = score(doc=527,freq=2.0), product of:
             0.14870429 = queryWeight, product of:
               1.5841991 = boost
               5.6614757 = idf(docFreq=403, maxDocs=42740)
               0.016579984 = queryNorm
             0.5004085 = fieldWeight in 527, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.6614757 = idf(docFreq=403, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.04781427 = weight(abstract_txt:searching in 527) [ClassicSimilarity], result of:
           0.04781427 = score(doc=527,freq=2.0), product of:
             0.12675355 = queryWeight, product of:
               1.7913222 = boost
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.016579984 = queryNorm
             0.3772223 = fieldWeight in 527, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.267783 = idf(docFreq=1627, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.09210817 = weight(abstract_txt:patterns in 527) [ClassicSimilarity], result of:
           0.09210817 = score(doc=527,freq=2.0), product of:
             0.19623987 = queryWeight, product of:
               2.228883 = boost
               5.3102612 = idf(docFreq=573, maxDocs=42740)
               0.016579984 = queryNorm
             0.4693652 = fieldWeight in 527, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.3102612 = idf(docFreq=573, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.1360198 = weight(abstract_txt:transaction in 527) [ClassicSimilarity], result of:
           0.1360198 = score(doc=527,freq=1.0), product of:
             0.32062685 = queryWeight, product of:
               2.8490074 = boost
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.016579984 = queryNorm
             0.4242308 = fieldWeight in 527, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.787693 = idf(docFreq=130, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
         0.11736585 = weight(abstract_txt:catalog in 527) [ClassicSimilarity], result of:
           0.11736585 = score(doc=527,freq=1.0), product of:
             0.34454232 = queryWeight, product of:
               3.8127584 = boost
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.016579984 = queryNorm
             0.34064278 = fieldWeight in 527, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4502845 = idf(docFreq=498, maxDocs=42740)
               0.0625 = fieldNorm(doc=527)
       0.44 = coord(11/25)