Document (#2940)

Author

Dalrymple, P.W.
Cox, R.

Title

¬An examination of the effects of non-Boolean enhancements to an information retrieval system

Source

Proceedings of the 13th National Online Meeting. Ed.: M.E. Williams

Imprint

New York : Learned Information

Year

1992

Pages

S.75-81

Abstract

One of the problems in information retrieval (IR) research is that few of the non-Boolean features of experimental systems developed by IR researchers have been adopted in commercially available systems which can be evaluated using real users with actual information needs. Without the opportunity to examnine how these features perform with actual bibliographic files and how they affect users in their information-seeking tasks, our understanding of information retrieval remains limited, and system development fails to advance. The research describes here compared two CD-ROM MEDLINE systems for the Macintosh, one of which incorporates many of the features previously identified by research as central to sound and innovative IR design such as: elimination of the need for Boolean logical connectors, acceptance of a natural language query, and ranked output. The other is more traditional in its design. Two groups of search topics selected from the National Library of Medicine's test queries in clinical medicine were searched using both a natural language strategy and a strategy based on MeSH vocabulary. results were compared on the following variables: search input and processing times, set size, overlap between sets produced by the two systems, and evaluative judgements made by subject experts. The findings indicate the these systems differ on these dimensions, and greater variance occurs in the natural language searches

Theme

Retrievalstudien

Object

KnowledgeFinder
MEDLINE
MeSH

Similar documents (author)

1. Dalrymple, P.W.: KnowledgeFinder at Rockford : evaluation of a CD-ROM MEDLINE system in a community-based medical school library and outpatient clinic (1989) 5.94

   5.937289 = sum of:
     5.937289 = weight(author_txt:dalrymple in 4058) [ClassicSimilarity], result of:
       5.937289 = fieldWeight in 4058, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.499662 = idf(docFreq=8, maxDocs=44218)
         0.625 = fieldNorm(doc=4058)
   

2. Dalrymple, T.: ¬The EPIC service from OCLC (1993) 5.94

   5.937289 = sum of:
     5.937289 = weight(author_txt:dalrymple in 763) [ClassicSimilarity], result of:
       5.937289 = fieldWeight in 763, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.499662 = idf(docFreq=8, maxDocs=44218)
         0.625 = fieldNorm(doc=763)
   

3. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 5.94

   5.937289 = sum of:
     5.937289 = weight(author_txt:dalrymple in 5089) [ClassicSimilarity], result of:
       5.937289 = fieldWeight in 5089, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.499662 = idf(docFreq=8, maxDocs=44218)
         0.625 = fieldNorm(doc=5089)
   

4. Dalrymple, P.W.: Improving health care through information : research challenges for health sciences librarians (2003) 5.94

   5.937289 = sum of:
     5.937289 = weight(author_txt:dalrymple in 874) [ClassicSimilarity], result of:
       5.937289 = fieldWeight in 874, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.499662 = idf(docFreq=8, maxDocs=44218)
         0.625 = fieldNorm(doc=874)
   

5. Dalrymple, P.W.; Younger, J.A.: From authority control to informed retrieval : framing the expanded domain of subject access (1991) 4.75

   4.749831 = sum of:
     4.749831 = weight(author_txt:dalrymple in 427) [ClassicSimilarity], result of:
       4.749831 = fieldWeight in 427, 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=427)
   

Similar documents (content)

1. Hersh, W.R.; Hickam, D.H.: ¬An evaluation of interactive Boolean and natural language searching with an online medical textbook (1995) 0.40

   0.4046901 = sum of:
     0.4046901 = product of:
       1.1241391 = sum of:
         0.051704597 = weight(abstract_txt:search in 2651) [ClassicSimilarity], result of:
           0.051704597 = score(doc=2651,freq=3.0), product of:
             0.08704571 = queryWeight, product of:
               1.0035578 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.023711283 = queryNorm
             0.59399366 = fieldWeight in 2651, 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=2651)
         0.030146686 = weight(abstract_txt:were in 2651) [ClassicSimilarity], result of:
           0.030146686 = score(doc=2651,freq=1.0), product of:
             0.08761828 = queryWeight, product of:
               1.006853 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.023711283 = queryNorm
             0.34406847 = fieldWeight in 2651, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.076966174 = weight(abstract_txt:compared in 2651) [ClassicSimilarity], result of:
           0.076966174 = score(doc=2651,freq=1.0), product of:
             0.16366969 = queryWeight, product of:
               1.376109 = boost
               5.0160327 = idf(docFreq=796, maxDocs=44218)
               0.023711283 = queryNorm
             0.47025305 = fieldWeight in 2651, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0160327 = idf(docFreq=796, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.06649475 = weight(abstract_txt:retrieval in 2651) [ClassicSimilarity], result of:
           0.06649475 = score(doc=2651,freq=3.0), product of:
             0.117837414 = queryWeight, product of:
               1.4300655 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.023711283 = queryNorm
             0.5642923 = fieldWeight in 2651, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.13831858 = weight(abstract_txt:actual in 2651) [ClassicSimilarity], result of:
           0.13831858 = score(doc=2651,freq=1.0), product of:
             0.24192941 = queryWeight, product of:
               1.6730659 = boost
               6.0984654 = idf(docFreq=269, maxDocs=44218)
               0.023711283 = queryNorm
             0.57173115 = fieldWeight in 2651, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.0984654 = idf(docFreq=269, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.11589109 = weight(abstract_txt:language in 2651) [ClassicSimilarity], result of:
           0.11589109 = score(doc=2651,freq=3.0), product of:
             0.17065737 = queryWeight, product of:
               1.7209841 = boost
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.023711283 = queryNorm
             0.6790864 = fieldWeight in 2651, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.20764889 = weight(abstract_txt:natural in 2651) [ClassicSimilarity], result of:
           0.20764889 = score(doc=2651,freq=3.0), product of:
             0.25175497 = queryWeight, product of:
               2.0902746 = boost
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.023711283 = queryNorm
             0.8248055 = fieldWeight in 2651, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.12110705 = weight(abstract_txt:systems in 2651) [ClassicSimilarity], result of:
           0.12110705 = score(doc=2651,freq=4.0), product of:
             0.18931046 = queryWeight, product of:
               2.3400548 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.023711283 = queryNorm
             0.6397272 = fieldWeight in 2651, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
         0.31586125 = weight(abstract_txt:boolean in 2651) [ClassicSimilarity], result of:
           0.31586125 = score(doc=2651,freq=2.0), product of:
             0.38117084 = queryWeight, product of:
               2.572019 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.023711283 = queryNorm
             0.8286606 = fieldWeight in 2651, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.09375 = fieldNorm(doc=2651)
       0.36 = coord(9/25)
   

2. Samstag-Schnock, U.; Meadow, C.T.: PBS: an ecomical natural language query interpreter (1993) 0.29

   0.28620932 = sum of:
     0.28620932 = product of:
       0.8944041 = sum of:
         0.05628884 = weight(abstract_txt:search in 5091) [ClassicSimilarity], result of:
           0.05628884 = score(doc=5091,freq=2.0), product of:
             0.08704571 = queryWeight, product of:
               1.0035578 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.023711283 = queryNorm
             0.6466584 = fieldWeight in 5091, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.049008593 = weight(abstract_txt:design in 5091) [ClassicSimilarity], result of:
           0.049008593 = score(doc=5091,freq=1.0), product of:
             0.09999785 = queryWeight, product of:
               1.0756328 = boost
               3.9207718 = idf(docFreq=2382, maxDocs=44218)
               0.023711283 = queryNorm
             0.49009648 = fieldWeight in 5091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9207718 = idf(docFreq=2382, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.038865607 = weight(abstract_txt:research in 5091) [ClassicSimilarity], result of:
           0.038865607 = score(doc=5091,freq=1.0), product of:
             0.098073095 = queryWeight, product of:
               1.3046358 = boost
               3.170338 = idf(docFreq=5046, maxDocs=44218)
               0.023711283 = queryNorm
             0.39629224 = fieldWeight in 5091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.170338 = idf(docFreq=5046, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.05118768 = weight(abstract_txt:retrieval in 5091) [ClassicSimilarity], result of:
           0.05118768 = score(doc=5091,freq=1.0), product of:
             0.117837414 = queryWeight, product of:
               1.4300655 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.023711283 = queryNorm
             0.43439242 = fieldWeight in 5091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.028843839 = weight(abstract_txt:information in 5091) [ClassicSimilarity], result of:
           0.028843839 = score(doc=5091,freq=1.0), product of:
             0.09531426 = queryWeight, product of:
               1.6604187 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.023711283 = queryNorm
             0.3026183 = fieldWeight in 5091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.089213006 = weight(abstract_txt:language in 5091) [ClassicSimilarity], result of:
           0.089213006 = score(doc=5091,freq=1.0), product of:
             0.17065737 = queryWeight, product of:
               1.7209841 = boost
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.023711283 = queryNorm
             0.5227609 = fieldWeight in 5091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.15984818 = weight(abstract_txt:natural in 5091) [ClassicSimilarity], result of:
           0.15984818 = score(doc=5091,freq=1.0), product of:
             0.25175497 = queryWeight, product of:
               2.0902746 = boost
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.023711283 = queryNorm
             0.63493556 = fieldWeight in 5091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
         0.42114836 = weight(abstract_txt:boolean in 5091) [ClassicSimilarity], result of:
           0.42114836 = score(doc=5091,freq=2.0), product of:
             0.38117084 = queryWeight, product of:
               2.572019 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.023711283 = queryNorm
             1.1048808 = fieldWeight in 5091, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.125 = fieldNorm(doc=5091)
       0.32 = coord(8/25)
   

3. Kreymer, O.: ¬An evaluation of help mechanisms in natural language information retrieval systems (2002) 0.24

   0.24294803 = sum of:
     0.24294803 = product of:
       0.6748556 = sum of:
         0.01990111 = weight(abstract_txt:search in 2557) [ClassicSimilarity], result of:
           0.01990111 = score(doc=2557,freq=1.0), product of:
             0.08704571 = queryWeight, product of:
               1.0035578 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.023711283 = queryNorm
             0.22862828 = fieldWeight in 2557, 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=2557)
         0.024504296 = weight(abstract_txt:design in 2557) [ClassicSimilarity], result of:
           0.024504296 = score(doc=2557,freq=1.0), product of:
             0.09999785 = queryWeight, product of:
               1.0756328 = boost
               3.9207718 = idf(docFreq=2382, maxDocs=44218)
               0.023711283 = queryNorm
             0.24504824 = fieldWeight in 2557, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9207718 = idf(docFreq=2382, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.027947413 = weight(abstract_txt:these in 2557) [ClassicSimilarity], result of:
           0.027947413 = score(doc=2557,freq=2.0), product of:
             0.099176936 = queryWeight, product of:
               1.3119572 = boost
               3.1881294 = idf(docFreq=4957, maxDocs=44218)
               0.023711283 = queryNorm
             0.28179348 = fieldWeight in 2557, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1881294 = idf(docFreq=4957, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.05118768 = weight(abstract_txt:retrieval in 2557) [ClassicSimilarity], result of:
           0.05118768 = score(doc=2557,freq=4.0), product of:
             0.117837414 = queryWeight, product of:
               1.4300655 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.023711283 = queryNorm
             0.43439242 = fieldWeight in 2557, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.032248393 = weight(abstract_txt:information in 2557) [ClassicSimilarity], result of:
           0.032248393 = score(doc=2557,freq=5.0), product of:
             0.09531426 = queryWeight, product of:
               1.6604187 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.023711283 = queryNorm
             0.33833754 = fieldWeight in 2557, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.089213006 = weight(abstract_txt:language in 2557) [ClassicSimilarity], result of:
           0.089213006 = score(doc=2557,freq=4.0), product of:
             0.17065737 = queryWeight, product of:
               1.7209841 = boost
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.023711283 = queryNorm
             0.5227609 = fieldWeight in 2557, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.15984818 = weight(abstract_txt:natural in 2557) [ClassicSimilarity], result of:
           0.15984818 = score(doc=2557,freq=4.0), product of:
             0.25175497 = queryWeight, product of:
               2.0902746 = boost
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.023711283 = queryNorm
             0.63493556 = fieldWeight in 2557, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.12110705 = weight(abstract_txt:systems in 2557) [ClassicSimilarity], result of:
           0.12110705 = score(doc=2557,freq=9.0), product of:
             0.18931046 = queryWeight, product of:
               2.3400548 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.023711283 = queryNorm
             0.6397272 = fieldWeight in 2557, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
         0.14889842 = weight(abstract_txt:boolean in 2557) [ClassicSimilarity], result of:
           0.14889842 = score(doc=2557,freq=1.0), product of:
             0.38117084 = queryWeight, product of:
               2.572019 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.023711283 = queryNorm
             0.39063436 = fieldWeight in 2557, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.0625 = fieldNorm(doc=2557)
       0.36 = coord(9/25)
   

4. Vigil, P.J.: Associative and Boolean retrieval : a comparative analysis (1994) 0.23

   0.23395824 = sum of:
     0.23395824 = product of:
       0.7311195 = sum of:
         0.034934267 = weight(abstract_txt:these in 1941) [ClassicSimilarity], result of:
           0.034934267 = score(doc=1941,freq=2.0), product of:
             0.099176936 = queryWeight, product of:
               1.3119572 = boost
               3.1881294 = idf(docFreq=4957, maxDocs=44218)
               0.023711283 = queryNorm
             0.35224184 = fieldWeight in 1941, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1881294 = idf(docFreq=4957, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.07836481 = weight(abstract_txt:retrieval in 1941) [ClassicSimilarity], result of:
           0.07836481 = score(doc=1941,freq=6.0), product of:
             0.117837414 = queryWeight, product of:
               1.4300655 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.023711283 = queryNorm
             0.6650249 = fieldWeight in 1941, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.018027399 = weight(abstract_txt:information in 1941) [ClassicSimilarity], result of:
           0.018027399 = score(doc=1941,freq=1.0), product of:
             0.09531426 = queryWeight, product of:
               1.6604187 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.023711283 = queryNorm
             0.18913643 = fieldWeight in 1941, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.055758126 = weight(abstract_txt:language in 1941) [ClassicSimilarity], result of:
           0.055758126 = score(doc=1941,freq=1.0), product of:
             0.17065737 = queryWeight, product of:
               1.7209841 = boost
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.023711283 = queryNorm
             0.32672557 = fieldWeight in 1941, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.07129399 = weight(abstract_txt:features in 1941) [ClassicSimilarity], result of:
           0.07129399 = score(doc=1941,freq=1.0), product of:
             0.20104264 = queryWeight, product of:
               1.8679206 = boost
               4.5391517 = idf(docFreq=1283, maxDocs=44218)
               0.023711283 = queryNorm
             0.35462123 = fieldWeight in 1941, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5391517 = idf(docFreq=1283, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.09990512 = weight(abstract_txt:natural in 1941) [ClassicSimilarity], result of:
           0.09990512 = score(doc=1941,freq=1.0), product of:
             0.25175497 = queryWeight, product of:
               2.0902746 = boost
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.023711283 = queryNorm
             0.39683473 = fieldWeight in 1941, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0794845 = idf(docFreq=747, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.05046127 = weight(abstract_txt:systems in 1941) [ClassicSimilarity], result of:
           0.05046127 = score(doc=1941,freq=1.0), product of:
             0.18931046 = queryWeight, product of:
               2.3400548 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.023711283 = queryNorm
             0.26655298 = fieldWeight in 1941, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
         0.32237455 = weight(abstract_txt:boolean in 1941) [ClassicSimilarity], result of:
           0.32237455 = score(doc=1941,freq=3.0), product of:
             0.38117084 = queryWeight, product of:
               2.572019 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.023711283 = queryNorm
             0.8457482 = fieldWeight in 1941, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.078125 = fieldNorm(doc=1941)
       0.32 = coord(8/25)
   

5. Frants, V.I.; Shapiro, J.; Taksa, I.; Voiskunskii, V.G.: Boolean search : current state and perspectives (1999) 0.22

   0.2162026 = sum of:
     0.2162026 = product of:
       0.7721521 = sum of:
         0.029851666 = weight(abstract_txt:search in 2954) [ClassicSimilarity], result of:
           0.029851666 = score(doc=2954,freq=1.0), product of:
             0.08704571 = queryWeight, product of:
               1.0035578 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.023711283 = queryNorm
             0.34294242 = fieldWeight in 2954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
         0.02964271 = weight(abstract_txt:these in 2954) [ClassicSimilarity], result of:
           0.02964271 = score(doc=2954,freq=1.0), product of:
             0.099176936 = queryWeight, product of:
               1.3119572 = boost
               3.1881294 = idf(docFreq=4957, maxDocs=44218)
               0.023711283 = queryNorm
             0.29888713 = fieldWeight in 2954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1881294 = idf(docFreq=4957, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
         0.03839076 = weight(abstract_txt:retrieval in 2954) [ClassicSimilarity], result of:
           0.03839076 = score(doc=2954,freq=1.0), product of:
             0.117837414 = queryWeight, product of:
               1.4300655 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.023711283 = queryNorm
             0.3257943 = fieldWeight in 2954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
         0.03059351 = weight(abstract_txt:information in 2954) [ClassicSimilarity], result of:
           0.03059351 = score(doc=2954,freq=2.0), product of:
             0.09531426 = queryWeight, product of:
               1.6604187 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.023711283 = queryNorm
             0.32097518 = fieldWeight in 2954, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
         0.08555278 = weight(abstract_txt:features in 2954) [ClassicSimilarity], result of:
           0.08555278 = score(doc=2954,freq=1.0), product of:
             0.20104264 = queryWeight, product of:
               1.8679206 = boost
               4.5391517 = idf(docFreq=1283, maxDocs=44218)
               0.023711283 = queryNorm
             0.42554545 = fieldWeight in 2954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5391517 = idf(docFreq=1283, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
         0.17127123 = weight(abstract_txt:systems in 2954) [ClassicSimilarity], result of:
           0.17127123 = score(doc=2954,freq=8.0), product of:
             0.18931046 = queryWeight, product of:
               2.3400548 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.023711283 = queryNorm
             0.9047109 = fieldWeight in 2954, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
         0.38684946 = weight(abstract_txt:boolean in 2954) [ClassicSimilarity], result of:
           0.38684946 = score(doc=2954,freq=3.0), product of:
             0.38117084 = queryWeight, product of:
               2.572019 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.023711283 = queryNorm
             1.0148978 = fieldWeight in 2954, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.09375 = fieldNorm(doc=2954)
       0.28 = coord(7/25)