Document (#27587)

Author

Tombros, A.
Villa, R.
Rijsbergen, C.J. Van

Title

¬The effectiveness of query-specific hierarchic clustering in information retrieval

Source

Information processing and management. 38(2002) no.4, S.559-582

Year

2002

Abstract

Hierarchic document clustering has been widely applied to information retrieval (IR) on the grounds of its potential improved effectiveness over inverted file search (IFS). However, previous research has been inconclusive as to whether clustering does bring improvements. In this paper we take the view that if hierarchic clustering is applied to search results (query-specific clustering), then it has the potential to increase the retrieval effectiveness compared both to that of static clustering and of conventional IFS. We conducted a number of experiments using five document collections and four hierarchic clustering methods. Our results show that the effectiveness of query-specific clustering is indeed higher, and suggest that there is scope for its application to IR.

Similar documents (author)

1. Tombros, T.; Crestani, F.: Users' perception of relevance of spoken documents (2000) 1.87

   1.8707383 = sum of:
     1.8707383 = product of:
       3.7414765 = sum of:
         3.7414765 = weight(author_txt:tombros in 4996) [ClassicSimilarity], result of:
           3.7414765 = score(doc=4996,freq=1.0), product of:
             0.78770727 = queryWeight, product of:
               1.1307708 = boost
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.073330075 = queryNorm
             4.749831 = fieldWeight in 4996, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.5 = fieldNorm(doc=4996)
       0.5 = coord(1/2)
   

2. Tao, Y.; Tombros, A.: How collaborators make sense of tasks together : a comparative analysis of collaborative sensemaking behavior in collaborative information-seeking tasks (2017) 1.87

   1.8707383 = sum of:
     1.8707383 = product of:
       3.7414765 = sum of:
         3.7414765 = weight(author_txt:tombros in 3429) [ClassicSimilarity], result of:
           3.7414765 = score(doc=3429,freq=1.0), product of:
             0.78770727 = queryWeight, product of:
               1.1307708 = boost
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.073330075 = queryNorm
             4.749831 = fieldWeight in 3429, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.5 = fieldNorm(doc=3429)
       0.5 = coord(1/2)
   

3. Tombros, A.; Ruthven, I.; Jose, J.M.: How users assess Web pages for information seeking (2005) 1.40

   1.4030538 = sum of:
     1.4030538 = product of:
       2.8061075 = sum of:
         2.8061075 = weight(author_txt:tombros in 5255) [ClassicSimilarity], result of:
           2.8061075 = score(doc=5255,freq=1.0), product of:
             0.78770727 = queryWeight, product of:
               1.1307708 = boost
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.073330075 = queryNorm
             3.5623734 = fieldWeight in 5255, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.375 = fieldNorm(doc=5255)
       0.5 = coord(1/2)
   

4. Sahib, N.G.; Tombros, A.; Stockman, T.: ¬A comparative analysis of the information-seeking behavior of visually impaired and sighted searchers (2012) 1.40

   1.4030538 = sum of:
     1.4030538 = product of:
       2.8061075 = sum of:
         2.8061075 = weight(author_txt:tombros in 4989) [ClassicSimilarity], result of:
           2.8061075 = score(doc=4989,freq=1.0), product of:
             0.78770727 = queryWeight, product of:
               1.1307708 = boost
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.073330075 = queryNorm
             3.5623734 = fieldWeight in 4989, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.375 = fieldNorm(doc=4989)
       0.5 = coord(1/2)
   

5. Sahib, N.G.; Tombros, A.; Stockman, T.: Investigating the behavior of visually impaired users for multi-session search tasks (2014) 1.40

   1.4030538 = sum of:
     1.4030538 = product of:
       2.8061075 = sum of:
         2.8061075 = weight(author_txt:tombros in 1181) [ClassicSimilarity], result of:
           2.8061075 = score(doc=1181,freq=1.0), product of:
             0.78770727 = queryWeight, product of:
               1.1307708 = boost
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.073330075 = queryNorm
             3.5623734 = fieldWeight in 1181, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.375 = fieldNorm(doc=1181)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Kirriemuir, J.W.; Willet, P.: Identification of duplicate and near-duplicate full-text records in database search-outputs using hierarchic cluster analysis (1995) 0.51

   0.5066329 = sum of:
     0.5066329 = product of:
       2.1109705 = sum of:
         0.014752558 = weight(abstract_txt:results in 2429) [ClassicSimilarity], result of:
           0.014752558 = score(doc=2429,freq=1.0), product of:
             0.04518712 = queryWeight, product of:
               1.2404729 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.010460343 = queryNorm
             0.32647708 = fieldWeight in 2429, 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=2429)
         0.01653778 = weight(abstract_txt:been in 2429) [ClassicSimilarity], result of:
           0.01653778 = score(doc=2429,freq=1.0), product of:
             0.048762716 = queryWeight, product of:
               1.2886171 = boost
               3.617579 = idf(docFreq=3226, maxDocs=44218)
               0.010460343 = queryNorm
             0.33914804 = fieldWeight in 2429, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.617579 = idf(docFreq=3226, maxDocs=44218)
               0.09375 = fieldNorm(doc=2429)
         0.029616483 = weight(abstract_txt:search in 2429) [ClassicSimilarity], result of:
           0.029616483 = score(doc=2429,freq=3.0), product of:
             0.04985993 = queryWeight, product of:
               1.3030342 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.010460343 = queryNorm
             0.59399366 = fieldWeight in 2429, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.09375 = fieldNorm(doc=2429)
         0.018588295 = weight(abstract_txt:that in 2429) [ClassicSimilarity], result of:
           0.018588295 = score(doc=2429,freq=4.0), product of:
             0.041839465 = queryWeight, product of:
               1.6880606 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.010460343 = queryNorm
             0.44427657 = fieldWeight in 2429, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.09375 = fieldNorm(doc=2429)
         1.4501374 = weight(title_txt:hierarchic in 2429) [ClassicSimilarity], result of:
           1.4501374 = score(doc=2429,freq=1.0), product of:
             0.689289 = queryWeight, product of:
               6.8516574 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.010460343 = queryNorm
             2.1038163 = fieldWeight in 2429, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.21875 = fieldNorm(doc=2429)
         0.5813381 = weight(abstract_txt:clustering in 2429) [ClassicSimilarity], result of:
           0.5813381 = score(doc=2429,freq=3.0), product of:
             0.57592845 = queryWeight, product of:
               8.857155 = boost
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.010460343 = queryNorm
             1.009393 = fieldWeight in 2429, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.09375 = fieldNorm(doc=2429)
       0.24 = coord(6/25)
   

2. Baeza-Yates, R.; Hurtado, C.; Mendoza, M.: Improving search engines by query clustering (2007) 0.22

   0.22269495 = sum of:
     0.22269495 = product of:
       0.92789567 = sum of:
         0.029616483 = weight(abstract_txt:search in 601) [ClassicSimilarity], result of:
           0.029616483 = score(doc=601,freq=3.0), product of:
             0.04985993 = queryWeight, product of:
               1.3030342 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.010460343 = queryNorm
             0.59399366 = fieldWeight in 601, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.09375 = fieldNorm(doc=601)
         0.02763038 = weight(abstract_txt:document in 601) [ClassicSimilarity], result of:
           0.02763038 = score(doc=601,freq=1.0), product of:
             0.0686585 = queryWeight, product of:
               1.5290692 = boost
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.010460343 = queryNorm
             0.40243202 = fieldWeight in 601, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.09375 = fieldNorm(doc=601)
         0.009294148 = weight(abstract_txt:that in 601) [ClassicSimilarity], result of:
           0.009294148 = score(doc=601,freq=1.0), product of:
             0.041839465 = queryWeight, product of:
               1.6880606 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.010460343 = queryNorm
             0.22213829 = fieldWeight in 601, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.09375 = fieldNorm(doc=601)
         0.09749628 = weight(abstract_txt:query in 601) [ClassicSimilarity], result of:
           0.09749628 = score(doc=601,freq=3.0), product of:
             0.12630439 = queryWeight, product of:
               2.5400064 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.010460343 = queryNorm
             0.7719152 = fieldWeight in 601, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.09375 = fieldNorm(doc=601)
         0.09258684 = weight(abstract_txt:effectiveness in 601) [ClassicSimilarity], result of:
           0.09258684 = score(doc=601,freq=1.0), product of:
             0.19370727 = queryWeight, product of:
               3.6321847 = boost
               5.098378 = idf(docFreq=733, maxDocs=44218)
               0.010460343 = queryNorm
             0.47797295 = fieldWeight in 601, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.098378 = idf(docFreq=733, maxDocs=44218)
               0.09375 = fieldNorm(doc=601)
         0.6712715 = weight(abstract_txt:clustering in 601) [ClassicSimilarity], result of:
           0.6712715 = score(doc=601,freq=4.0), product of:
             0.57592845 = queryWeight, product of:
               8.857155 = boost
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.010460343 = queryNorm
             1.1655467 = fieldWeight in 601, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.09375 = fieldNorm(doc=601)
       0.24 = coord(6/25)
   

3. Burgin, R.: ¬The retrieval effectiveness of 5 clustering algorithms as a function of indexing exhaustivity (1995) 0.22

   0.22125496 = sum of:
     0.22125496 = product of:
       0.7901963 = sum of:
         0.027802296 = weight(abstract_txt:improvements in 3365) [ClassicSimilarity], result of:
           0.027802296 = score(doc=3365,freq=1.0), product of:
             0.07170361 = queryWeight, product of:
               1.1049318 = boost
               6.203826 = idf(docFreq=242, maxDocs=44218)
               0.010460343 = queryNorm
             0.38773912 = fieldWeight in 3365, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.203826 = idf(docFreq=242, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
         0.01139939 = weight(abstract_txt:search in 3365) [ClassicSimilarity], result of:
           0.01139939 = score(doc=3365,freq=1.0), product of:
             0.04985993 = queryWeight, product of:
               1.3030342 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.010460343 = queryNorm
             0.22862828 = fieldWeight in 3365, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
         0.031904813 = weight(abstract_txt:document in 3365) [ClassicSimilarity], result of:
           0.031904813 = score(doc=3365,freq=3.0), product of:
             0.0686585 = queryWeight, product of:
               1.5290692 = boost
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.010460343 = queryNorm
             0.46468848 = fieldWeight in 3365, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
         0.008762606 = weight(abstract_txt:that in 3365) [ClassicSimilarity], result of:
           0.008762606 = score(doc=3365,freq=2.0), product of:
             0.041839465 = queryWeight, product of:
               1.6880606 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.010460343 = queryNorm
             0.20943399 = fieldWeight in 3365, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
         0.038787227 = weight(abstract_txt:retrieval in 3365) [ClassicSimilarity], result of:
           0.038787227 = score(doc=3365,freq=7.0), product of:
             0.06749747 = queryWeight, product of:
               1.8568181 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.010460343 = queryNorm
             0.5746471 = fieldWeight in 3365, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
         0.12344912 = weight(abstract_txt:effectiveness in 3365) [ClassicSimilarity], result of:
           0.12344912 = score(doc=3365,freq=4.0), product of:
             0.19370727 = queryWeight, product of:
               3.6321847 = boost
               5.098378 = idf(docFreq=733, maxDocs=44218)
               0.010460343 = queryNorm
             0.6372973 = fieldWeight in 3365, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.098378 = idf(docFreq=733, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
         0.5480909 = weight(abstract_txt:clustering in 3365) [ClassicSimilarity], result of:
           0.5480909 = score(doc=3365,freq=6.0), product of:
             0.57592845 = queryWeight, product of:
               8.857155 = boost
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.010460343 = queryNorm
             0.95166487 = fieldWeight in 3365, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.0625 = fieldNorm(doc=3365)
       0.28 = coord(7/25)
   

4. Park, G.; Baek, Y.; Lee, H.-K.: Re-ranking algorithm using post-retrieval clustering for content-based image retrieval (2005) 0.20

   0.20161925 = sum of:
     0.20161925 = product of:
       0.72006875 = sum of:
         0.02866774 = weight(abstract_txt:conventional in 1005) [ClassicSimilarity], result of:
           0.02866774 = score(doc=1005,freq=1.0), product of:
             0.07318401 = queryWeight, product of:
               1.1162798 = boost
               6.2675414 = idf(docFreq=227, maxDocs=44218)
               0.010460343 = queryNorm
             0.39172134 = fieldWeight in 1005, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2675414 = idf(docFreq=227, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
         0.019670079 = weight(abstract_txt:results in 1005) [ClassicSimilarity], result of:
           0.019670079 = score(doc=1005,freq=4.0), product of:
             0.04518712 = queryWeight, product of:
               1.2404729 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.010460343 = queryNorm
             0.43530276 = fieldWeight in 1005, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
         0.008762606 = weight(abstract_txt:that in 1005) [ClassicSimilarity], result of:
           0.008762606 = score(doc=1005,freq=2.0), product of:
             0.041839465 = queryWeight, product of:
               1.6880606 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.010460343 = queryNorm
             0.20943399 = fieldWeight in 1005, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
         0.03591 = weight(abstract_txt:retrieval in 1005) [ClassicSimilarity], result of:
           0.03591 = score(doc=1005,freq=6.0), product of:
             0.06749747 = queryWeight, product of:
               1.8568181 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.010460343 = queryNorm
             0.5320199 = fieldWeight in 1005, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
         0.06499752 = weight(abstract_txt:query in 1005) [ClassicSimilarity], result of:
           0.06499752 = score(doc=1005,freq=3.0), product of:
             0.12630439 = queryWeight, product of:
               2.5400064 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.010460343 = queryNorm
             0.5146101 = fieldWeight in 1005, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
         0.06172456 = weight(abstract_txt:effectiveness in 1005) [ClassicSimilarity], result of:
           0.06172456 = score(doc=1005,freq=1.0), product of:
             0.19370727 = queryWeight, product of:
               3.6321847 = boost
               5.098378 = idf(docFreq=733, maxDocs=44218)
               0.010460343 = queryNorm
             0.31864864 = fieldWeight in 1005, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.098378 = idf(docFreq=733, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
         0.5003362 = weight(abstract_txt:clustering in 1005) [ClassicSimilarity], result of:
           0.5003362 = score(doc=1005,freq=5.0), product of:
             0.57592845 = queryWeight, product of:
               8.857155 = boost
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.010460343 = queryNorm
             0.8687472 = fieldWeight in 1005, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.0625 = fieldNorm(doc=1005)
       0.28 = coord(7/25)
   

5. Liu, W.; Dog(an, R.I.; Kim, S.; Comeau, D.C.; Kim, W.; Yeganova, L.; Lu, Z.; Wilbur, W.J.: Author name disambiguation for PubMed (2014) 0.19

   0.19094764 = sum of:
     0.19094764 = product of:
       0.5967114 = sum of:
         0.01803359 = weight(abstract_txt:increase in 1240) [ClassicSimilarity], result of:
           0.01803359 = score(doc=1240,freq=1.0), product of:
             0.05873136 = queryWeight, product of:
               5.6146684 = idf(docFreq=437, maxDocs=44218)
               0.010460343 = queryNorm
             0.30705217 = fieldWeight in 1240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6146684 = idf(docFreq=437, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.018582055 = weight(abstract_txt:improved in 1240) [ClassicSimilarity], result of:
           0.018582055 = score(doc=1240,freq=1.0), product of:
             0.059916213 = queryWeight, product of:
               1.0100367 = boost
               5.6710215 = idf(docFreq=413, maxDocs=44218)
               0.010460343 = queryNorm
             0.310134 = fieldWeight in 1240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6710215 = idf(docFreq=413, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.017211318 = weight(abstract_txt:results in 1240) [ClassicSimilarity], result of:
           0.017211318 = score(doc=1240,freq=4.0), product of:
             0.04518712 = queryWeight, product of:
               1.2404729 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.010460343 = queryNorm
             0.38088992 = fieldWeight in 1240, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.009974466 = weight(abstract_txt:search in 1240) [ClassicSimilarity], result of:
           0.009974466 = score(doc=1240,freq=1.0), product of:
             0.04985993 = queryWeight, product of:
               1.3030342 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.010460343 = queryNorm
             0.20004974 = fieldWeight in 1240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.0076672803 = weight(abstract_txt:that in 1240) [ClassicSimilarity], result of:
           0.0076672803 = score(doc=1240,freq=2.0), product of:
             0.041839465 = queryWeight, product of:
               1.6880606 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.010460343 = queryNorm
             0.18325473 = fieldWeight in 1240, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.01282767 = weight(abstract_txt:retrieval in 1240) [ClassicSimilarity], result of:
           0.01282767 = score(doc=1240,freq=1.0), product of:
             0.06749747 = queryWeight, product of:
               1.8568181 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.010460343 = queryNorm
             0.19004668 = fieldWeight in 1240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.03283554 = weight(abstract_txt:query in 1240) [ClassicSimilarity], result of:
           0.03283554 = score(doc=1240,freq=1.0), product of:
             0.12630439 = queryWeight, product of:
               2.5400064 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.010460343 = queryNorm
             0.2599715 = fieldWeight in 1240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
         0.4795795 = weight(abstract_txt:clustering in 1240) [ClassicSimilarity], result of:
           0.4795795 = score(doc=1240,freq=6.0), product of:
             0.57592845 = queryWeight, product of:
               8.857155 = boost
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.010460343 = queryNorm
             0.83270675 = fieldWeight in 1240, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.2162485 = idf(docFreq=239, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1240)
       0.32 = coord(8/25)