Document (#37011)

Author

Thelwall, M.

Title

Assessing web search engines : a webometric approach

Source

Innovations in information retrieval: perspectives for theory and practice. Eds.: A. Foster, u. P. Rafferty

Imprint

London : Facet Publ.

Year

2011

Pages

S.135-145

Abstract

Information Retrieval (IR) research typically evaluates search systems in terms of the standard precision, recall and F-measures to weight the relative importance of precision and recall (e.g. van Rijsbergen, 1979). All of these assess the extent to which the system returns good matches for a query. In contrast, webometric measures are designed specifically for web search engines and are designed to monitor changes in results over time and various aspects of the internal logic of the way in which search engine select the results to be returned. This chapter introduces a range of webometric measurements and illustrates them with case studies of Google, Bing and Yahoo! This is a very fertile area for simple and complex new investigations into search engine results.

Theme

Suchmaschinen

Similar documents (author)

1. Thelwall, M.; Thelwall, S.: ¬A thematic analysis of highly retweeted early COVID-19 tweets : consensus, information, dissent and lockdown life (2020) 4.90

   4.897565 = sum of:
     4.897565 = weight(author_txt:thelwall in 178) [ClassicSimilarity], result of:
       4.897565 = fieldWeight in 178, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         6.926203 = idf(docFreq=117, maxDocs=44218)
         0.5 = fieldNorm(doc=178)
   

2. Thelwall, M.: Extracting macroscopic information from Web links (2001) 4.33

   4.3288765 = sum of:
     4.3288765 = weight(author_txt:thelwall in 6851) [ClassicSimilarity], result of:
       4.3288765 = fieldWeight in 6851, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.926203 = idf(docFreq=117, maxDocs=44218)
         0.625 = fieldNorm(doc=6851)
   

3. Thelwall, M.: Conceptualizing documentation on the Web : an evaluation of different heuristic-based models for counting links between university Web sites (2002) 4.33

   4.3288765 = sum of:
     4.3288765 = weight(author_txt:thelwall in 978) [ClassicSimilarity], result of:
       4.3288765 = fieldWeight in 978, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.926203 = idf(docFreq=117, maxDocs=44218)
         0.625 = fieldNorm(doc=978)
   

4. Thelwall, M.: Text characteristics of English language university Web sites (2005) 4.33

   4.3288765 = sum of:
     4.3288765 = weight(author_txt:thelwall in 3463) [ClassicSimilarity], result of:
       4.3288765 = fieldWeight in 3463, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.926203 = idf(docFreq=117, maxDocs=44218)
         0.625 = fieldNorm(doc=3463)
   

5. Thelwall, M.: Bibliometrics to webometrics (2009) 4.33

   4.3288765 = sum of:
     4.3288765 = weight(author_txt:thelwall in 4239) [ClassicSimilarity], result of:
       4.3288765 = fieldWeight in 4239, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.926203 = idf(docFreq=117, maxDocs=44218)
         0.625 = fieldNorm(doc=4239)
   

Similar documents (content)

1. Thelwall, M.; Sud, P.: ¬A comparison of methods for collecting web citation data for academic organizations (2011) 0.27

   0.26951548 = sum of:
     0.26951548 = product of:
       0.9625553 = sum of:
         0.08621803 = weight(abstract_txt:yahoo in 4626) [ClassicSimilarity], result of:
           0.08621803 = score(doc=4626,freq=3.0), product of:
             0.12027824 = queryWeight, product of:
               1.0258048 = boost
               6.6217136 = idf(docFreq=159, maxDocs=44218)
               0.017707285 = queryNorm
             0.7168215 = fieldWeight in 4626, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.6217136 = idf(docFreq=159, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
         0.15972467 = weight(abstract_txt:bing in 4626) [ClassicSimilarity], result of:
           0.15972467 = score(doc=4626,freq=2.0), product of:
             0.20768258 = queryWeight, product of:
               1.347942 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.017707285 = queryNorm
             0.7690807 = fieldWeight in 4626, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
         0.0217216 = weight(abstract_txt:results in 4626) [ClassicSimilarity], result of:
           0.0217216 = score(doc=4626,freq=1.0), product of:
             0.09979996 = queryWeight, product of:
               1.6184415 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.017707285 = queryNorm
             0.21765138 = fieldWeight in 4626, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
         0.051095597 = weight(abstract_txt:engines in 4626) [ClassicSimilarity], result of:
           0.051095597 = score(doc=4626,freq=1.0), product of:
             0.15420356 = queryWeight, product of:
               1.6426059 = boost
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.017707285 = queryNorm
             0.3313516 = fieldWeight in 4626, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
         0.100288354 = weight(abstract_txt:engine in 4626) [ClassicSimilarity], result of:
           0.100288354 = score(doc=4626,freq=3.0), product of:
             0.16760951 = queryWeight, product of:
               1.7125194 = boost
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.017707285 = queryNorm
             0.5983452 = fieldWeight in 4626, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
         0.0938277 = weight(abstract_txt:search in 4626) [ClassicSimilarity], result of:
           0.0938277 = score(doc=4626,freq=5.0), product of:
             0.18353383 = queryWeight, product of:
               2.8334415 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.017707285 = queryNorm
             0.5112284 = fieldWeight in 4626, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
         0.4496793 = weight(abstract_txt:webometric in 4626) [ClassicSimilarity], result of:
           0.4496793 = score(doc=4626,freq=2.0), product of:
             0.59721094 = queryWeight, product of:
               3.9590929 = boost
               8.518833 = idf(docFreq=23, maxDocs=44218)
               0.017707285 = queryNorm
             0.75296557 = fieldWeight in 4626, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.518833 = idf(docFreq=23, maxDocs=44218)
               0.0625 = fieldNorm(doc=4626)
       0.28 = coord(7/25)
   

2. Thelwall, M.: Quantitative comparisons of search engine results (2008) 0.25

   0.253571 = sum of:
     0.253571 = product of:
       0.90561074 = sum of:
         0.04611512 = weight(abstract_txt:contrast in 2350) [ClassicSimilarity], result of:
           0.04611512 = score(doc=2350,freq=1.0), product of:
             0.114303 = queryWeight, product of:
               6.45514 = idf(docFreq=188, maxDocs=44218)
               0.017707285 = queryNorm
             0.40344626 = fieldWeight in 2350, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.45514 = idf(docFreq=188, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
         0.12193071 = weight(abstract_txt:yahoo in 2350) [ClassicSimilarity], result of:
           0.12193071 = score(doc=2350,freq=6.0), product of:
             0.12027824 = queryWeight, product of:
               1.0258048 = boost
               6.6217136 = idf(docFreq=159, maxDocs=44218)
               0.017707285 = queryNorm
             1.0137388 = fieldWeight in 2350, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.6217136 = idf(docFreq=159, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
         0.061147757 = weight(abstract_txt:investigations in 2350) [ClassicSimilarity], result of:
           0.061147757 = score(doc=2350,freq=1.0), product of:
             0.1379587 = queryWeight, product of:
               1.0986155 = boost
               7.0917172 = idf(docFreq=99, maxDocs=44218)
               0.017707285 = queryNorm
             0.44323233 = fieldWeight in 2350, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.0917172 = idf(docFreq=99, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
         0.03071898 = weight(abstract_txt:results in 2350) [ClassicSimilarity], result of:
           0.03071898 = score(doc=2350,freq=2.0), product of:
             0.09979996 = queryWeight, product of:
               1.6184415 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.017707285 = queryNorm
             0.30780554 = fieldWeight in 2350, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
         0.102191195 = weight(abstract_txt:engines in 2350) [ClassicSimilarity], result of:
           0.102191195 = score(doc=2350,freq=4.0), product of:
             0.15420356 = queryWeight, product of:
               1.6426059 = boost
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.017707285 = queryNorm
             0.6627032 = fieldWeight in 2350, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
         0.0938277 = weight(abstract_txt:search in 2350) [ClassicSimilarity], result of:
           0.0938277 = score(doc=2350,freq=5.0), product of:
             0.18353383 = queryWeight, product of:
               2.8334415 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.017707285 = queryNorm
             0.5112284 = fieldWeight in 2350, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
         0.4496793 = weight(abstract_txt:webometric in 2350) [ClassicSimilarity], result of:
           0.4496793 = score(doc=2350,freq=2.0), product of:
             0.59721094 = queryWeight, product of:
               3.9590929 = boost
               8.518833 = idf(docFreq=23, maxDocs=44218)
               0.017707285 = queryNorm
             0.75296557 = fieldWeight in 2350, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.518833 = idf(docFreq=23, maxDocs=44218)
               0.0625 = fieldNorm(doc=2350)
       0.28 = coord(7/25)
   

3. Vaughan, L.: New measurements for search engine evaluation proposed and tested (2004) 0.24

   0.24102268 = sum of:
     0.24102268 = product of:
       0.86079526 = sum of:
         0.2526479 = weight(abstract_txt:measurements in 2535) [ClassicSimilarity], result of:
           0.2526479 = score(doc=2535,freq=4.0), product of:
             0.1707753 = queryWeight, product of:
               1.2223166 = boost
               7.890225 = idf(docFreq=44, maxDocs=44218)
               0.017707285 = queryNorm
             1.4794172 = fieldWeight in 2535, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.890225 = idf(docFreq=44, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
         0.0325824 = weight(abstract_txt:results in 2535) [ClassicSimilarity], result of:
           0.0325824 = score(doc=2535,freq=1.0), product of:
             0.09979996 = queryWeight, product of:
               1.6184415 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.017707285 = queryNorm
             0.32647708 = fieldWeight in 2535, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
         0.07664339 = weight(abstract_txt:engines in 2535) [ClassicSimilarity], result of:
           0.07664339 = score(doc=2535,freq=1.0), product of:
             0.15420356 = queryWeight, product of:
               1.6426059 = boost
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.017707285 = queryNorm
             0.4970274 = fieldWeight in 2535, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
         0.08675377 = weight(abstract_txt:precision in 2535) [ClassicSimilarity], result of:
           0.08675377 = score(doc=2535,freq=1.0), product of:
             0.16748278 = queryWeight, product of:
               1.7118719 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.017707285 = queryNorm
             0.51798624 = fieldWeight in 2535, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
         0.17370452 = weight(abstract_txt:engine in 2535) [ClassicSimilarity], result of:
           0.17370452 = score(doc=2535,freq=4.0), product of:
             0.16760951 = queryWeight, product of:
               1.7125194 = boost
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.017707285 = queryNorm
             1.0363643 = fieldWeight in 2535, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
         0.097721696 = weight(abstract_txt:recall in 2535) [ClassicSimilarity], result of:
           0.097721696 = score(doc=2535,freq=1.0), product of:
             0.18131702 = queryWeight, product of:
               1.7811704 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.017707285 = queryNorm
             0.5389549 = fieldWeight in 2535, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
         0.14074156 = weight(abstract_txt:search in 2535) [ClassicSimilarity], result of:
           0.14074156 = score(doc=2535,freq=5.0), product of:
             0.18353383 = queryWeight, product of:
               2.8334415 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.017707285 = queryNorm
             0.7668426 = fieldWeight in 2535, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.09375 = fieldNorm(doc=2535)
       0.28 = coord(7/25)
   

4. Bar-Ilan, J.: On the overlap, the precision and estimated recall of search engines : a case study of the query 'Erdös' (1998) 0.23

   0.23077224 = sum of:
     0.23077224 = product of:
       0.82418656 = sum of:
         0.108154535 = weight(abstract_txt:returned in 3753) [ClassicSimilarity], result of:
           0.108154535 = score(doc=3753,freq=1.0), product of:
             0.15398003 = queryWeight, product of:
               1.1606556 = boost
               7.4921947 = idf(docFreq=66, maxDocs=44218)
               0.017707285 = queryNorm
             0.70239323 = fieldWeight in 3753, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.4921947 = idf(docFreq=66, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.04607847 = weight(abstract_txt:results in 3753) [ClassicSimilarity], result of:
           0.04607847 = score(doc=3753,freq=2.0), product of:
             0.09979996 = queryWeight, product of:
               1.6184415 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.017707285 = queryNorm
             0.4617083 = fieldWeight in 3753, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.13275026 = weight(abstract_txt:engines in 3753) [ClassicSimilarity], result of:
           0.13275026 = score(doc=3753,freq=3.0), product of:
             0.15420356 = queryWeight, product of:
               1.6426059 = boost
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.017707285 = queryNorm
             0.8608767 = fieldWeight in 3753, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.12268837 = weight(abstract_txt:precision in 3753) [ClassicSimilarity], result of:
           0.12268837 = score(doc=3753,freq=2.0), product of:
             0.16748278 = queryWeight, product of:
               1.7118719 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.017707285 = queryNorm
             0.7325432 = fieldWeight in 3753, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.15043253 = weight(abstract_txt:engine in 3753) [ClassicSimilarity], result of:
           0.15043253 = score(doc=3753,freq=3.0), product of:
             0.16760951 = queryWeight, product of:
               1.7125194 = boost
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.017707285 = queryNorm
             0.8975178 = fieldWeight in 3753, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.13819936 = weight(abstract_txt:recall in 3753) [ClassicSimilarity], result of:
           0.13819936 = score(doc=3753,freq=2.0), product of:
             0.18131702 = queryWeight, product of:
               1.7811704 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.017707285 = queryNorm
             0.7621974 = fieldWeight in 3753, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.12588307 = weight(abstract_txt:search in 3753) [ClassicSimilarity], result of:
           0.12588307 = score(doc=3753,freq=4.0), product of:
             0.18353383 = queryWeight, product of:
               2.8334415 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.017707285 = queryNorm
             0.68588483 = fieldWeight in 3753, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
       0.28 = coord(7/25)
   

5. 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) 0.21

   0.2089338 = sum of:
     0.2089338 = product of:
       0.74619216 = sum of:
         0.040350728 = weight(abstract_txt:contrast in 393) [ClassicSimilarity], result of:
           0.040350728 = score(doc=393,freq=1.0), product of:
             0.114303 = queryWeight, product of:
               6.45514 = idf(docFreq=188, maxDocs=44218)
               0.017707285 = queryNorm
             0.35301548 = fieldWeight in 393, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.45514 = idf(docFreq=188, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
         0.12319427 = weight(abstract_txt:yahoo in 393) [ClassicSimilarity], result of:
           0.12319427 = score(doc=393,freq=8.0), product of:
             0.12027824 = queryWeight, product of:
               1.0258048 = boost
               6.6217136 = idf(docFreq=159, maxDocs=44218)
               0.017707285 = queryNorm
             1.0242441 = fieldWeight in 393, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               6.6217136 = idf(docFreq=159, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
         0.19764918 = weight(abstract_txt:bing in 393) [ClassicSimilarity], result of:
           0.19764918 = score(doc=393,freq=4.0), product of:
             0.20768258 = queryWeight, product of:
               1.347942 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.017707285 = queryNorm
             0.95168877 = fieldWeight in 393, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
         0.118287966 = weight(abstract_txt:engines in 393) [ClassicSimilarity], result of:
           0.118287966 = score(doc=393,freq=7.0), product of:
             0.15420356 = queryWeight, product of:
               1.6426059 = boost
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.017707285 = queryNorm
             0.7670897 = fieldWeight in 393, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               5.3016257 = idf(docFreq=598, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
         0.14313643 = weight(abstract_txt:precision in 393) [ClassicSimilarity], result of:
           0.14313643 = score(doc=393,freq=8.0), product of:
             0.16748278 = queryWeight, product of:
               1.7118719 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.017707285 = queryNorm
             0.8546337 = fieldWeight in 393, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
         0.071649455 = weight(abstract_txt:engine in 393) [ClassicSimilarity], result of:
           0.071649455 = score(doc=393,freq=2.0), product of:
             0.16760951 = queryWeight, product of:
               1.7125194 = boost
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.017707285 = queryNorm
             0.42747846 = fieldWeight in 393, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5272765 = idf(docFreq=477, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
         0.051924117 = weight(abstract_txt:search in 393) [ClassicSimilarity], result of:
           0.051924117 = score(doc=393,freq=2.0), product of:
             0.18353383 = queryWeight, product of:
               2.8334415 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.017707285 = queryNorm
             0.28291306 = fieldWeight in 393, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0546875 = fieldNorm(doc=393)
       0.28 = coord(7/25)