-
Nicolaisen, J.: Citation analysis (2007)
0.10
0.09830935 = product of:
0.1966187 = sum of:
0.1966187 = sum of:
0.016631123 = weight(_text_:e in 6091) [ClassicSimilarity], result of:
0.016631123 = score(doc=6091,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.2540935 = fieldWeight in 6091, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.125 = fieldNorm(doc=6091)
0.081274554 = weight(_text_:j in 6091) [ClassicSimilarity], result of:
0.081274554 = score(doc=6091,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.5617073 = fieldWeight in 6091, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.125 = fieldNorm(doc=6091)
0.098713025 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
0.098713025 = score(doc=6091,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.61904186 = fieldWeight in 6091, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=6091)
0.5 = coord(1/2)
- Date
- 13. 7.2008 19:53:22
- Language
- e
-
Mingers, J.; Burrell, Q.L.: Modeling citation behavior in Management Science journals (2006)
0.04
0.03686601 = product of:
0.07373202 = sum of:
0.07373202 = sum of:
0.006236671 = weight(_text_:e in 994) [ClassicSimilarity], result of:
0.006236671 = score(doc=994,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.09528506 = fieldWeight in 994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=994)
0.03047796 = weight(_text_:j in 994) [ClassicSimilarity], result of:
0.03047796 = score(doc=994,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.21064025 = fieldWeight in 994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=994)
0.037017386 = weight(_text_:22 in 994) [ClassicSimilarity], result of:
0.037017386 = score(doc=994,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.23214069 = fieldWeight in 994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=994)
0.5 = coord(1/2)
- Date
- 26.12.2007 19:22:05
- Language
- e
-
Ma, N.; Guan, J.; Zhao, Y.: Bringing PageRank to the citation analysis (2008)
0.04
0.03686601 = product of:
0.07373202 = sum of:
0.07373202 = sum of:
0.006236671 = weight(_text_:e in 2064) [ClassicSimilarity], result of:
0.006236671 = score(doc=2064,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.09528506 = fieldWeight in 2064, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=2064)
0.03047796 = weight(_text_:j in 2064) [ClassicSimilarity], result of:
0.03047796 = score(doc=2064,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.21064025 = fieldWeight in 2064, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2064)
0.037017386 = weight(_text_:22 in 2064) [ClassicSimilarity], result of:
0.037017386 = score(doc=2064,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.23214069 = fieldWeight in 2064, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2064)
0.5 = coord(1/2)
- Date
- 31. 7.2008 14:22:05
- Language
- e
-
Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
0.03
0.032548424 = product of:
0.06509685 = sum of:
0.06509685 = product of:
0.09764527 = sum of:
0.010394452 = weight(_text_:e in 3925) [ClassicSimilarity], result of:
0.010394452 = score(doc=3925,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.15880844 = fieldWeight in 3925, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.078125 = fieldNorm(doc=3925)
0.087250814 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
0.087250814 = score(doc=3925,freq=4.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.54716086 = fieldWeight in 3925, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3925)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 7.2006 15:22:28
- Language
- e
-
Nicolaisen, J.: ¬The J-shaped distribution of citedness (2002)
0.03
0.0262338 = product of:
0.0524676 = sum of:
0.0524676 = product of:
0.0787014 = sum of:
0.008315561 = weight(_text_:e in 3765) [ClassicSimilarity], result of:
0.008315561 = score(doc=3765,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.12704675 = fieldWeight in 3765, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0625 = fieldNorm(doc=3765)
0.070385836 = weight(_text_:j in 3765) [ClassicSimilarity], result of:
0.070385836 = score(doc=3765,freq=6.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.48645282 = fieldWeight in 3765, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0625 = fieldNorm(doc=3765)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- A new approach for investigating the correlation between research quality and citation counts is presented and applied to a case study of the relationship between peer evaluations reflected in scholarly book reviews and the citation frequencies of reviewed books. Results of the study designate a J-shaped distribution between the considered variables, presumably caused by a skewed allocation of negative citations. The paper concludes with suggestions for further research.
- Language
- e
-
Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009)
0.02
0.02039016 = product of:
0.04078032 = sum of:
0.04078032 = product of:
0.061170477 = sum of:
0.008819985 = weight(_text_:e in 2763) [ClassicSimilarity], result of:
0.008819985 = score(doc=2763,freq=4.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.13475344 = fieldWeight in 2763, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=2763)
0.05235049 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
0.05235049 = score(doc=2763,freq=4.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.32829654 = fieldWeight in 2763, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2763)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 3.2009 19:22:35
- Language
- e
-
Garfield, E.: Recollections of Irving H. Sher 1924-1996 : Polymath/information scientist extraordinaire (2001)
0.02
0.017825644 = product of:
0.03565129 = sum of:
0.03565129 = product of:
0.05347693 = sum of:
0.010289983 = weight(_text_:e in 6920) [ClassicSimilarity], result of:
0.010289983 = score(doc=6920,freq=4.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.15721233 = fieldWeight in 6920, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0546875 = fieldNorm(doc=6920)
0.043186948 = weight(_text_:22 in 6920) [ClassicSimilarity], result of:
0.043186948 = score(doc=6920,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.2708308 = fieldWeight in 6920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=6920)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 16.12.2001 14:01:22
- Language
- e
-
Pudovkin, A.I.; Garfield, E.: Algorithmic procedure for finding semantically related journals (2002)
0.02
0.017113712 = product of:
0.034227423 = sum of:
0.034227423 = product of:
0.05134113 = sum of:
0.0073499875 = weight(_text_:e in 5220) [ClassicSimilarity], result of:
0.0073499875 = score(doc=5220,freq=4.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.112294525 = fieldWeight in 5220, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=5220)
0.043991145 = weight(_text_:j in 5220) [ClassicSimilarity], result of:
0.043991145 = score(doc=5220,freq=6.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.304033 = fieldWeight in 5220, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=5220)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- Journal Citation Reports provides a classification of journals most heavily cited by a given journal and which most heavily cite that journal, but size variation is not taken into account. Pudovkin and Garfield suggest a procedure for meeting this difficulty. The relatedness of journal i to journal j is determined by the number of citations from journal i to journal j in a given year normalized by the product of the papers published in the j journal in that year times the number of references cited in the i journal in that year. A multiplier of ten to the sixth is suggested to bring the values into an easily perceptible range. While citations received depend upon the overall cumulative number of papers published by a journal, the current year is utilized since that data is available in JCR. Citations to current year papers would be quite low in most fields and thus not included. To produce the final index, the maximum of the A citing B value, and the B citing A value is chosen and used to indicate the closeness of the journals. The procedure is illustrated for the journal Genetics.
- Language
- e
-
Van der Veer Martens, B.; Goodrum, G.: ¬The diffusion of theories : a functional approach (2006)
0.02
0.016821023 = product of:
0.033642046 = sum of:
0.033642046 = product of:
0.050463066 = sum of:
0.0072761164 = weight(_text_:e in 5269) [ClassicSimilarity], result of:
0.0072761164 = score(doc=5269,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.1111659 = fieldWeight in 5269, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0546875 = fieldNorm(doc=5269)
0.043186948 = weight(_text_:22 in 5269) [ClassicSimilarity], result of:
0.043186948 = score(doc=5269,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.2708308 = fieldWeight in 5269, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=5269)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 7.2006 15:20:01
- Language
- e
-
Chan, H.C.; Kim, H.-W.; Tan, W.C.: Information systems citation patterns from International Conference on Information Systems articles (2006)
0.01
0.01441802 = product of:
0.02883604 = sum of:
0.02883604 = product of:
0.04325406 = sum of:
0.006236671 = weight(_text_:e in 201) [ClassicSimilarity], result of:
0.006236671 = score(doc=201,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.09528506 = fieldWeight in 201, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=201)
0.037017386 = weight(_text_:22 in 201) [ClassicSimilarity], result of:
0.037017386 = score(doc=201,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.23214069 = fieldWeight in 201, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=201)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 3. 1.2007 17:22:03
- Language
- e
-
Jacobs, N.; Woodfield, J.; Morris, A.: Using local citation data to relate the use of journal articles by academic researchers to the coverage of full-text document access systems (2000)
0.01
0.012238211 = product of:
0.024476422 = sum of:
0.024476422 = product of:
0.036714632 = sum of:
0.006236671 = weight(_text_:e in 4541) [ClassicSimilarity], result of:
0.006236671 = score(doc=4541,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.09528506 = fieldWeight in 4541, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=4541)
0.03047796 = weight(_text_:j in 4541) [ClassicSimilarity], result of:
0.03047796 = score(doc=4541,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.21064025 = fieldWeight in 4541, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=4541)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Language
- e
-
Leydesdorff, L.; Bihui, J.: Mapping the Chinese Science Citation Database in terms of aggregated journal-journal citation relations (2005)
0.01
0.012238211 = product of:
0.024476422 = sum of:
0.024476422 = product of:
0.036714632 = sum of:
0.006236671 = weight(_text_:e in 4813) [ClassicSimilarity], result of:
0.006236671 = score(doc=4813,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.09528506 = fieldWeight in 4813, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=4813)
0.03047796 = weight(_text_:j in 4813) [ClassicSimilarity], result of:
0.03047796 = score(doc=4813,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.21064025 = fieldWeight in 4813, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=4813)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Language
- e
-
Lin, X.; White, H.D.; Buzydlowski, J.: Real-time author co-citation mapping for online searching (2003)
0.01
0.012238211 = product of:
0.024476422 = sum of:
0.024476422 = product of:
0.036714632 = sum of:
0.006236671 = weight(_text_:e in 1080) [ClassicSimilarity], result of:
0.006236671 = score(doc=1080,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.09528506 = fieldWeight in 1080, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=1080)
0.03047796 = weight(_text_:j in 1080) [ClassicSimilarity], result of:
0.03047796 = score(doc=1080,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.21064025 = fieldWeight in 1080, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=1080)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Language
- e
-
Gabel, J.: Improving information retrieval of subjects through citation-analysis (2006)
0.01
0.010198509 = product of:
0.020397019 = sum of:
0.020397019 = product of:
0.030595526 = sum of:
0.005197226 = weight(_text_:e in 61) [ClassicSimilarity], result of:
0.005197226 = score(doc=61,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.07940422 = fieldWeight in 61, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=61)
0.0253983 = weight(_text_:j in 61) [ClassicSimilarity], result of:
0.0253983 = score(doc=61,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.17553353 = fieldWeight in 61, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=61)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Language
- e
-
Gabel, J.: Improving information retrieval of subjects through citation-analysis : a study (2006)
0.01
0.010198509 = product of:
0.020397019 = sum of:
0.020397019 = product of:
0.030595526 = sum of:
0.005197226 = weight(_text_:e in 225) [ClassicSimilarity], result of:
0.005197226 = score(doc=225,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.07940422 = fieldWeight in 225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=225)
0.0253983 = weight(_text_:j in 225) [ClassicSimilarity], result of:
0.0253983 = score(doc=225,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.17553353 = fieldWeight in 225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=225)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Language
- e
-
Lai, K.-K.; Wu, S.-J.: Using the patent co-citation approach to establish a new patent classification system (2005)
0.01
0.010198509 = product of:
0.020397019 = sum of:
0.020397019 = product of:
0.030595526 = sum of:
0.005197226 = weight(_text_:e in 1013) [ClassicSimilarity], result of:
0.005197226 = score(doc=1013,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.07940422 = fieldWeight in 1013, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=1013)
0.0253983 = weight(_text_:j in 1013) [ClassicSimilarity], result of:
0.0253983 = score(doc=1013,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.17553353 = fieldWeight in 1013, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=1013)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Language
- e
-
Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003)
0.01
0.010186083 = product of:
0.020372165 = sum of:
0.020372165 = product of:
0.030558247 = sum of:
0.0058799903 = weight(_text_:e in 5171) [ClassicSimilarity], result of:
0.0058799903 = score(doc=5171,freq=4.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.08983562 = fieldWeight in 5171, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.03125 = fieldNorm(doc=5171)
0.024678256 = weight(_text_:22 in 5171) [ClassicSimilarity], result of:
0.024678256 = score(doc=5171,freq=2.0), product of:
0.15946099 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04553648 = queryNorm
0.15476047 = fieldWeight in 5171, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=5171)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- Ahlgren, Jarneving, and. Rousseau review accepted procedures for author co-citation analysis first pointing out that since in the raw data matrix the row and column values are identical i,e, the co-citation count of two authors, there is no clear choice for diagonal values. They suggest the number of times an author has been co-cited with himself excluding self citation rather than the common treatment as zeros or as missing values. When the matrix is converted to a similarity matrix the normal procedure is to create a matrix of Pearson's r coefficients between data vectors. Ranking by r and by co-citation frequency and by intuition can easily yield three different orders. It would seem necessary that the adding of zeros to the matrix will not affect the value or the relative order of similarity measures but it is shown that this is not the case with Pearson's r. Using 913 bibliographic descriptions form the Web of Science of articles form JASIS and Scientometrics, authors names were extracted, edited and 12 information retrieval authors and 12 bibliometric authors each from the top 100 most cited were selected. Co-citation and r value (diagonal elements treated as missing) matrices were constructed, and then reconstructed in expanded form. Adding zeros can both change the r value and the ordering of the authors based upon that value. A chi-squared distance measure would not violate these requirements, nor would the cosine coefficient. It is also argued that co-citation data is ordinal data since there is no assurance of an absolute zero number of co-citations, and thus Pearson is not appropriate. The number of ties in co-citation data make the use of the Spearman rank order coefficient problematic.
- Date
- 9. 7.2006 10:22:35
- Language
- e
-
De Bellis, N.: Bibliometrics and citation analysis : from the Science citation index to cybermetrics (2008)
0.01
0.008158807 = product of:
0.016317613 = sum of:
0.016317613 = product of:
0.02447642 = sum of:
0.0041577807 = weight(_text_:e in 3585) [ClassicSimilarity], result of:
0.0041577807 = score(doc=3585,freq=2.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.063523374 = fieldWeight in 3585, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.03125 = fieldNorm(doc=3585)
0.020318639 = weight(_text_:j in 3585) [ClassicSimilarity], result of:
0.020318639 = score(doc=3585,freq=2.0), product of:
0.144692 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.04553648 = queryNorm
0.14042683 = fieldWeight in 3585, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.03125 = fieldNorm(doc=3585)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Footnote
- Rez. in: JASIS 61(2010) no.1, S.205-207 (Jeppe Nicolaisen) Weitere Rez. in: Mitt VÖB 63(2010) H.1/2, S.134-135 (J. Gorraiz u. M. Wieland): "Das Buch entwickelte sich aus einem mehrjährigen Forschungsprojekt mit dem Ziel, den schwer verständlichen quantitativen Kern der Bibliometrie in einem für primär italienische Bibliothekare leichteren historischen und philosophischen Kontext zu vermitteln, wie der Autor im Vorwort erklärt. Dank einer Empfehlung von Eugene Garfield steht dieses Werk nun auch in englischer Übersetzung einer internationalen Leserschaft zur Verfügung. Die über 400 Seiten lange Monografie von de Bellis gibt in acht Kapiteln einen detaillierten und sehr präzisen Überblick über die Bibliometrie und die Zitationsanalyse, ihre Natur und Entwicklung, ihre Kontroverse und Prognose. . . . Das Buch von de Bellis ist sehr empfehlenswert für alle die beabsichtigen, sich mit dieser neuen Wissenschaft zu beschäftigen. Es endet mit folgendem Statement: "Scientometricians have to learn to live in a multidimensional world". Und genau hier liegt die Herausforderung und Schönheit dieses Metiers."
- Language
- e
-
¬The Web of knowledge : Festschrift in honor of Eugene Garfield (2000)
0.00
0.0030006198 = product of:
0.0060012396 = sum of:
0.0060012396 = product of:
0.018003719 = sum of:
0.018003719 = weight(_text_:e in 461) [ClassicSimilarity], result of:
0.018003719 = score(doc=461,freq=6.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.2750643 = fieldWeight in 461, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.078125 = fieldNorm(doc=461)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Biographed
- Garfield, E.
- Footnote
- Rez. in: Knowledge organization 28(2001) no.1, S.45-46 (M.J. López Huertas u. E. Jiménez-Contreras); Password 2002, H.3, S.14-19 (W.G. Stock)
- Language
- e
-
Yakel, E.: Seeking information, seeking connections, seeking meaning : genealogists and family historians (2004)
0.00
0.0029399951 = product of:
0.0058799903 = sum of:
0.0058799903 = product of:
0.01763997 = sum of:
0.01763997 = weight(_text_:e in 4206) [ClassicSimilarity], result of:
0.01763997 = score(doc=4206,freq=4.0), product of:
0.06545277 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.04553648 = queryNorm
0.26950687 = fieldWeight in 4206, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.09375 = fieldNorm(doc=4206)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Language
- e
