Document (#36539)

Author

Lewandowski, D.

Title

¬The retrieval effectiveness of search engines on navigational queries

Source

Aslib proceedings. 63(2011) no.4, S.354-363

Year

2011

Abstract

Purpose - The purpose of this paper is to test major web search engines on their performance on navigational queries, i.e. searches for homepages. Design/methodology/approach - In total, 100 user queries are posed to six search engines (Google, Yahoo!, MSN, Ask, Seekport, and Exalead). Users described the desired pages, and the results position of these was recorded. Measured success and mean reciprocal rank are calculated. Findings - The performance of the major search engines Google, Yahoo!, and MSN was found to be the best, with around 90 per cent of queries answered correctly. Ask and Exalead performed worse but received good scores as well. Research limitations/implications - All queries were in German, and the German-language interfaces of the search engines were used. Therefore, the results are only valid for German queries. Practical implications - When designing a search engine to compete with the major search engines, care should be taken on the performance on navigational queries. Users can be influenced easily in their quality ratings of search engines based on this performance. Originality/value - This study systematically compares the major search engines on navigational queries and compares the findings with studies on the retrieval effectiveness of the engines on informational queries.

Theme

Suchmaschinen

Similar documents (author)

1. Lewandowski, D.: Informationsarmut : sowohl ein quantitatives als auch ein qualitatives Problem (1999) 4.75

   4.749678 = sum of:
     4.749678 = weight(author_txt:lewandowski in 4647) [ClassicSimilarity], result of:
       4.749678 = fieldWeight in 4647, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.599485 = idf(docFreq=59, maxDocs=44083)
         0.625 = fieldNorm(doc=4647)
   

2. Lewandowski, D.: Wie können sich Bibliotheken gegenüber Wissenschaftssuchmaschinen positionieren? (2007) 4.75

   4.749678 = sum of:
     4.749678 = weight(author_txt:lewandowski in 6113) [ClassicSimilarity], result of:
       4.749678 = fieldWeight in 6113, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.599485 = idf(docFreq=59, maxDocs=44083)
         0.625 = fieldNorm(doc=6113)
   

3. Lewandowski, D.: "Find what I mean not what I say" : Neuere Ansätze zur Qualifizierung von Suchmaschinen-Ergebnissen (2001) 4.75

   4.749678 = sum of:
     4.749678 = weight(author_txt:lewandowski in 6933) [ClassicSimilarity], result of:
       4.749678 = fieldWeight in 6933, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.599485 = idf(docFreq=59, maxDocs=44083)
         0.625 = fieldNorm(doc=6933)
   

4. Lewandowski, D.: Alles nur noch Google? : Entwicklungen im Bereich der WWW-Suchmaschinen (2002) 4.75

   4.749678 = sum of:
     4.749678 = weight(author_txt:lewandowski in 1998) [ClassicSimilarity], result of:
       4.749678 = fieldWeight in 1998, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.599485 = idf(docFreq=59, maxDocs=44083)
         0.625 = fieldNorm(doc=1998)
   

5. Lewandowski, D.: Aktualität als erfolgskritischer Faktor bei Suchmaschinen (2006) 4.75

   4.749678 = sum of:
     4.749678 = weight(author_txt:lewandowski in 2817) [ClassicSimilarity], result of:
       4.749678 = fieldWeight in 2817, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.599485 = idf(docFreq=59, maxDocs=44083)
         0.625 = fieldNorm(doc=2817)
   

Similar documents (content)

1. Lewandowski, D.: Evaluating the retrieval effectiveness of web search engines using a representative query sample (2015) 0.70

   0.70277333 = sum of:
     0.70277333 = product of:
       1.5972121 = sum of:
         0.021083413 = weight(abstract_txt:were in 3158) [ClassicSimilarity], result of:
           0.021083413 = score(doc=3158,freq=2.0), product of:
             0.051959556 = queryWeight, product of:
               1.0113086 = boost
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.013989792 = queryNorm
             0.40576583 = fieldWeight in 3158, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.007073026 = weight(abstract_txt:with in 3158) [ClassicSimilarity], result of:
           0.007073026 = score(doc=3158,freq=1.0), product of:
             0.036181126 = queryWeight, product of:
               1.0335646 = boost
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.013989792 = queryNorm
             0.19548939 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.039973814 = weight(abstract_txt:effectiveness in 3158) [ClassicSimilarity], result of:
           0.039973814 = score(doc=3158,freq=1.0), product of:
             0.10028405 = queryWeight, product of:
               1.4049695 = boost
               5.1021557 = idf(docFreq=728, maxDocs=44083)
               0.013989792 = queryNorm
             0.3986059 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1021557 = idf(docFreq=728, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.06589066 = weight(abstract_txt:google in 3158) [ClassicSimilarity], result of:
           0.06589066 = score(doc=3158,freq=2.0), product of:
             0.1110676 = queryWeight, product of:
               1.4785794 = boost
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.013989792 = queryNorm
             0.59324825 = fieldWeight in 3158, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.10347302 = weight(abstract_txt:performance in 3158) [ClassicSimilarity], result of:
           0.10347302 = score(doc=3158,freq=3.0), product of:
             0.16515909 = queryWeight, product of:
               2.549865 = boost
               4.6299257 = idf(docFreq=1168, maxDocs=44083)
               0.013989792 = queryNorm
             0.62650514 = fieldWeight in 3158, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.6299257 = idf(docFreq=1168, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.06082102 = weight(abstract_txt:major in 3158) [ClassicSimilarity], result of:
           0.06082102 = score(doc=3158,freq=1.0), product of:
             0.16714521 = queryWeight, product of:
               2.565151 = boost
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.013989792 = queryNorm
             0.36388132 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.11121811 = weight(abstract_txt:german in 3158) [ClassicSimilarity], result of:
           0.11121811 = score(doc=3158,freq=1.0), product of:
             0.22708872 = queryWeight, product of:
               2.5893714 = boost
               6.2688794 = idf(docFreq=226, maxDocs=44083)
               0.013989792 = queryNorm
             0.4897562 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2688794 = idf(docFreq=226, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.41179597 = weight(abstract_txt:navigational in 3158) [ClassicSimilarity], result of:
           0.41179597 = score(doc=3158,freq=3.0), product of:
             0.41476852 = queryWeight, product of:
               4.040814 = boost
               7.3371205 = idf(docFreq=77, maxDocs=44083)
               0.013989792 = queryNorm
             0.99283326 = fieldWeight in 3158, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.3371205 = idf(docFreq=77, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.13253738 = weight(abstract_txt:search in 3158) [ClassicSimilarity], result of:
           0.13253738 = score(doc=3158,freq=4.0), product of:
             0.2319127 = queryWeight, product of:
               4.5323086 = boost
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.013989792 = queryNorm
             0.57149684 = fieldWeight in 3158, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.44168872 = weight(abstract_txt:queries in 3158) [ClassicSimilarity], result of:
           0.44168872 = score(doc=3158,freq=6.0), product of:
             0.45200795 = queryWeight, product of:
               6.327472 = boost
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.013989792 = queryNorm
             0.9771702 = fieldWeight in 3158, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
         0.20165698 = weight(abstract_txt:engines in 3158) [ClassicSimilarity], result of:
           0.20165698 = score(doc=3158,freq=1.0), product of:
             0.4869987 = queryWeight, product of:
               6.567818 = boost
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.013989792 = queryNorm
             0.41408116 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.078125 = fieldNorm(doc=3158)
       0.44 = coord(11/25)
   

2. Spink, A.; Jansen, B.J.; Blakely, C.; Koshman, S.: ¬A study of results overlap and uniqueness among major Web search engines (2006) 0.59

   0.59367526 = sum of:
     0.59367526 = product of:
       1.349262 = sum of:
         0.014758389 = weight(abstract_txt:were in 1994) [ClassicSimilarity], result of:
           0.014758389 = score(doc=1994,freq=2.0), product of:
             0.051959556 = queryWeight, product of:
               1.0113086 = boost
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.013989792 = queryNorm
             0.2840361 = fieldWeight in 1994, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.0049511185 = weight(abstract_txt:with in 1994) [ClassicSimilarity], result of:
           0.0049511185 = score(doc=1994,freq=1.0), product of:
             0.036181126 = queryWeight, product of:
               1.0335646 = boost
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.013989792 = queryNorm
             0.13684258 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.015133222 = weight(abstract_txt:findings in 1994) [ClassicSimilarity], result of:
           0.015133222 = score(doc=1994,freq=1.0), product of:
             0.06656875 = queryWeight, product of:
               1.1446854 = boost
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.013989792 = queryNorm
             0.22733223 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.032614216 = weight(abstract_txt:google in 1994) [ClassicSimilarity], result of:
           0.032614216 = score(doc=1994,freq=1.0), product of:
             0.1110676 = queryWeight, product of:
               1.4785794 = boost
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.013989792 = queryNorm
             0.29364294 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.04224642 = weight(abstract_txt:compares in 1994) [ClassicSimilarity], result of:
           0.04224642 = score(doc=1994,freq=1.0), product of:
             0.13198037 = queryWeight, product of:
               1.6117796 = boost
               5.853188 = idf(docFreq=343, maxDocs=44083)
               0.013989792 = queryNorm
             0.32009622 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.853188 = idf(docFreq=343, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.06108321 = weight(abstract_txt:yahoo in 1994) [ClassicSimilarity], result of:
           0.06108321 = score(doc=1994,freq=1.0), product of:
             0.16875786 = queryWeight, product of:
               1.8225647 = boost
               6.6186557 = idf(docFreq=159, maxDocs=44083)
               0.013989792 = queryNorm
             0.36195773 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6186557 = idf(docFreq=159, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.041818127 = weight(abstract_txt:performance in 1994) [ClassicSimilarity], result of:
           0.041818127 = score(doc=1994,freq=1.0), product of:
             0.16515909 = queryWeight, product of:
               2.549865 = boost
               4.6299257 = idf(docFreq=1168, maxDocs=44083)
               0.013989792 = queryNorm
             0.25319907 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6299257 = idf(docFreq=1168, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.060209736 = weight(abstract_txt:major in 1994) [ClassicSimilarity], result of:
           0.060209736 = score(doc=1994,freq=2.0), product of:
             0.16714521 = queryWeight, product of:
               2.565151 = boost
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.013989792 = queryNorm
             0.36022413 = fieldWeight in 1994, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.19126295 = weight(abstract_txt:search in 1994) [ClassicSimilarity], result of:
           0.19126295 = score(doc=1994,freq=17.0), product of:
             0.2319127 = queryWeight, product of:
               4.5323086 = boost
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.013989792 = queryNorm
             0.82471955 = fieldWeight in 1994, product of:
               4.1231055 = tf(freq=17.0), with freq of:
                 17.0 = termFreq=17.0
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.35701272 = weight(abstract_txt:queries in 1994) [ClassicSimilarity], result of:
           0.35701272 = score(doc=1994,freq=8.0), product of:
             0.45200795 = queryWeight, product of:
               6.327472 = boost
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.013989792 = queryNorm
             0.78983724 = fieldWeight in 1994, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
         0.52817196 = weight(abstract_txt:engines in 1994) [ClassicSimilarity], result of:
           0.52817196 = score(doc=1994,freq=14.0), product of:
             0.4869987 = queryWeight, product of:
               6.567818 = boost
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.013989792 = queryNorm
             1.0845449 = fieldWeight in 1994, product of:
               3.7416575 = tf(freq=14.0), with freq of:
                 14.0 = termFreq=14.0
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1994)
       0.44 = coord(11/25)
   

3. Bilal, D.: Ranking, relevance judgment, and precision of information retrieval on children's queries : evaluation of Google, Yahoo!, Bing, Yahoo! Kids, and ask Kids (2012) 0.45

   0.45103225 = sum of:
     0.45103225 = product of:
       1.1275806 = sum of:
         0.04035831 = weight(abstract_txt:calculated in 1394) [ClassicSimilarity], result of:
           0.04035831 = score(doc=1394,freq=1.0), product of:
             0.10160804 = queryWeight, product of:
               7.263013 = idf(docFreq=83, maxDocs=44083)
               0.013989792 = queryNorm
             0.39719602 = fieldWeight in 1394, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.263013 = idf(docFreq=83, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.010435757 = weight(abstract_txt:were in 1394) [ClassicSimilarity], result of:
           0.010435757 = score(doc=1394,freq=1.0), product of:
             0.051959556 = queryWeight, product of:
               1.0113086 = boost
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.013989792 = queryNorm
             0.20084386 = fieldWeight in 1394, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.008575588 = weight(abstract_txt:with in 1394) [ClassicSimilarity], result of:
           0.008575588 = score(doc=1394,freq=3.0), product of:
             0.036181126 = queryWeight, product of:
               1.0335646 = boost
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.013989792 = queryNorm
             0.23701829 = fieldWeight in 1394, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.015133222 = weight(abstract_txt:findings in 1394) [ClassicSimilarity], result of:
           0.015133222 = score(doc=1394,freq=1.0), product of:
             0.06656875 = queryWeight, product of:
               1.1446854 = boost
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.013989792 = queryNorm
             0.22733223 = fieldWeight in 1394, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.018990511 = weight(abstract_txt:implications in 1394) [ClassicSimilarity], result of:
           0.018990511 = score(doc=1394,freq=1.0), product of:
             0.07744747 = queryWeight, product of:
               1.2346804 = boost
               4.48375 = idf(docFreq=1352, maxDocs=44083)
               0.013989792 = queryNorm
             0.24520507 = fieldWeight in 1394, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.48375 = idf(docFreq=1352, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.06522843 = weight(abstract_txt:google in 1394) [ClassicSimilarity], result of:
           0.06522843 = score(doc=1394,freq=4.0), product of:
             0.1110676 = queryWeight, product of:
               1.4785794 = boost
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.013989792 = queryNorm
             0.5872859 = fieldWeight in 1394, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.17276941 = weight(abstract_txt:yahoo in 1394) [ClassicSimilarity], result of:
           0.17276941 = score(doc=1394,freq=8.0), product of:
             0.16875786 = queryWeight, product of:
               1.8225647 = boost
               6.6186557 = idf(docFreq=159, maxDocs=44083)
               0.013989792 = queryNorm
             1.023771 = fieldWeight in 1394, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               6.6186557 = idf(docFreq=159, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.06560265 = weight(abstract_txt:search in 1394) [ClassicSimilarity], result of:
           0.06560265 = score(doc=1394,freq=2.0), product of:
             0.2319127 = queryWeight, product of:
               4.5323086 = boost
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.013989792 = queryNorm
             0.2828765 = fieldWeight in 1394, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.35701272 = weight(abstract_txt:queries in 1394) [ClassicSimilarity], result of:
           0.35701272 = score(doc=1394,freq=8.0), product of:
             0.45200795 = queryWeight, product of:
               6.327472 = boost
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.013989792 = queryNorm
             0.78983724 = fieldWeight in 1394, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
         0.37347394 = weight(abstract_txt:engines in 1394) [ClassicSimilarity], result of:
           0.37347394 = score(doc=1394,freq=7.0), product of:
             0.4869987 = queryWeight, product of:
               6.567818 = boost
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.013989792 = queryNorm
             0.766889 = fieldWeight in 1394, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.0546875 = fieldNorm(doc=1394)
       0.4 = coord(10/25)
   

4. Lewandowski, D.: ¬The retrieval effectiveness of web search engines : considering results descriptions (2008) 0.41

   0.40522113 = sum of:
     0.40522113 = product of:
       1.0130528 = sum of:
         0.017295111 = weight(abstract_txt:findings in 3346) [ClassicSimilarity], result of:
           0.017295111 = score(doc=3346,freq=1.0), product of:
             0.06656875 = queryWeight, product of:
               1.1446854 = boost
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.013989792 = queryNorm
             0.25980827 = fieldWeight in 3346, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.030333627 = weight(abstract_txt:purpose in 3346) [ClassicSimilarity], result of:
           0.030333627 = score(doc=3346,freq=2.0), product of:
             0.07684124 = queryWeight, product of:
               1.2298386 = boost
               4.466167 = idf(docFreq=1376, maxDocs=44083)
               0.013989792 = queryNorm
             0.39475712 = fieldWeight in 3346, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.466167 = idf(docFreq=1376, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.0306933 = weight(abstract_txt:implications in 3346) [ClassicSimilarity], result of:
           0.0306933 = score(doc=3346,freq=2.0), product of:
             0.07744747 = queryWeight, product of:
               1.2346804 = boost
               4.48375 = idf(docFreq=1352, maxDocs=44083)
               0.013989792 = queryNorm
             0.39631122 = fieldWeight in 3346, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.48375 = idf(docFreq=1352, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.03197905 = weight(abstract_txt:effectiveness in 3346) [ClassicSimilarity], result of:
           0.03197905 = score(doc=3346,freq=1.0), product of:
             0.10028405 = queryWeight, product of:
               1.4049695 = boost
               5.1021557 = idf(docFreq=728, maxDocs=44083)
               0.013989792 = queryNorm
             0.31888473 = fieldWeight in 3346, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1021557 = idf(docFreq=728, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.07454678 = weight(abstract_txt:google in 3346) [ClassicSimilarity], result of:
           0.07454678 = score(doc=3346,freq=4.0), product of:
             0.1110676 = queryWeight, product of:
               1.4785794 = boost
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.013989792 = queryNorm
             0.6711838 = fieldWeight in 3346, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.09872537 = weight(abstract_txt:yahoo in 3346) [ClassicSimilarity], result of:
           0.09872537 = score(doc=3346,freq=2.0), product of:
             0.16875786 = queryWeight, product of:
               1.8225647 = boost
               6.6186557 = idf(docFreq=159, maxDocs=44083)
               0.013989792 = queryNorm
             0.585012 = fieldWeight in 3346, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.6186557 = idf(docFreq=159, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.08427607 = weight(abstract_txt:major in 3346) [ClassicSimilarity], result of:
           0.08427607 = score(doc=3346,freq=3.0), product of:
             0.16714521 = queryWeight, product of:
               2.565151 = boost
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.013989792 = queryNorm
             0.50420874 = fieldWeight in 3346, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.118545026 = weight(abstract_txt:search in 3346) [ClassicSimilarity], result of:
           0.118545026 = score(doc=3346,freq=5.0), product of:
             0.2319127 = queryWeight, product of:
               4.5323086 = boost
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.013989792 = queryNorm
             0.5111623 = fieldWeight in 3346, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.20400727 = weight(abstract_txt:queries in 3346) [ClassicSimilarity], result of:
           0.20400727 = score(doc=3346,freq=2.0), product of:
             0.45200795 = queryWeight, product of:
               6.327472 = boost
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.013989792 = queryNorm
             0.45133558 = fieldWeight in 3346, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
         0.32265118 = weight(abstract_txt:engines in 3346) [ClassicSimilarity], result of:
           0.32265118 = score(doc=3346,freq=4.0), product of:
             0.4869987 = queryWeight, product of:
               6.567818 = boost
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.013989792 = queryNorm
             0.6625298 = fieldWeight in 3346, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.0625 = fieldNorm(doc=3346)
       0.4 = coord(10/25)
   

5. Bar-Ilan, J.; Levene, M.; Mat-Hassan, M.: Methods for evaluating dynamic changes in search engine rankings : a case study (2006) 0.36

   0.3619884 = sum of:
     0.3619884 = product of:
       0.90497094 = sum of:
         0.018075261 = weight(abstract_txt:were in 742) [ClassicSimilarity], result of:
           0.018075261 = score(doc=742,freq=3.0), product of:
             0.051959556 = queryWeight, product of:
               1.0113086 = boost
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.013989792 = queryNorm
             0.34787175 = fieldWeight in 742, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.0070019388 = weight(abstract_txt:with in 742) [ClassicSimilarity], result of:
           0.0070019388 = score(doc=742,freq=2.0), product of:
             0.036181126 = queryWeight, product of:
               1.0335646 = boost
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.013989792 = queryNorm
             0.19352463 = fieldWeight in 742, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.5022643 = idf(docFreq=9813, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.021401607 = weight(abstract_txt:findings in 742) [ClassicSimilarity], result of:
           0.021401607 = score(doc=742,freq=2.0), product of:
             0.06656875 = queryWeight, product of:
               1.1446854 = boost
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.013989792 = queryNorm
             0.3214963 = fieldWeight in 742, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1569324 = idf(docFreq=1875, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.018767973 = weight(abstract_txt:purpose in 742) [ClassicSimilarity], result of:
           0.018767973 = score(doc=742,freq=1.0), product of:
             0.07684124 = queryWeight, product of:
               1.2298386 = boost
               4.466167 = idf(docFreq=1376, maxDocs=44083)
               0.013989792 = queryNorm
             0.2442435 = fieldWeight in 742, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.466167 = idf(docFreq=1376, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.046123464 = weight(abstract_txt:google in 742) [ClassicSimilarity], result of:
           0.046123464 = score(doc=742,freq=2.0), product of:
             0.1110676 = queryWeight, product of:
               1.4785794 = boost
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.013989792 = queryNorm
             0.4152738 = fieldWeight in 742, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.3694706 = idf(docFreq=557, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.04224642 = weight(abstract_txt:compares in 742) [ClassicSimilarity], result of:
           0.04224642 = score(doc=742,freq=1.0), product of:
             0.13198037 = queryWeight, product of:
               1.6117796 = boost
               5.853188 = idf(docFreq=343, maxDocs=44083)
               0.013989792 = queryNorm
             0.32009622 = fieldWeight in 742, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.853188 = idf(docFreq=343, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.060209736 = weight(abstract_txt:major in 742) [ClassicSimilarity], result of:
           0.060209736 = score(doc=742,freq=2.0), product of:
             0.16714521 = queryWeight, product of:
               2.565151 = boost
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.013989792 = queryNorm
             0.36022413 = fieldWeight in 742, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.13916424 = weight(abstract_txt:search in 742) [ClassicSimilarity], result of:
           0.13916424 = score(doc=742,freq=9.0), product of:
             0.2319127 = queryWeight, product of:
               4.5323086 = boost
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.013989792 = queryNorm
             0.60007167 = fieldWeight in 742, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               3.6575797 = idf(docFreq=3090, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.17850636 = weight(abstract_txt:queries in 742) [ClassicSimilarity], result of:
           0.17850636 = score(doc=742,freq=2.0), product of:
             0.45200795 = queryWeight, product of:
               6.327472 = boost
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.013989792 = queryNorm
             0.39491862 = fieldWeight in 742, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1062794 = idf(docFreq=725, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
         0.37347394 = weight(abstract_txt:engines in 742) [ClassicSimilarity], result of:
           0.37347394 = score(doc=742,freq=7.0), product of:
             0.4869987 = queryWeight, product of:
               6.567818 = boost
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.013989792 = queryNorm
             0.766889 = fieldWeight in 742, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               5.3002386 = idf(docFreq=597, maxDocs=44083)
               0.0546875 = fieldNorm(doc=742)
       0.4 = coord(10/25)