-
McCain, K.W.: Co-cited author mapping as a valid representation of intellectual structure (1986)
0.01
0.0058858437 = product of:
0.082401805 = sum of:
0.082401805 = weight(_text_:representation in 5505) [ClassicSimilarity], result of:
0.082401805 = score(doc=5505,freq=2.0), product of:
0.11578492 = queryWeight, product of:
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.025165197 = queryNorm
0.71167994 = fieldWeight in 5505, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.109375 = fieldNorm(doc=5505)
0.071428575 = coord(1/14)
-
Shaw, W.M.: Subject and citation indexing : pt.2: the optimal, cluster-based retrieval performance of composite representations (1991)
0.00
0.00475648 = product of:
0.06659072 = sum of:
0.06659072 = weight(_text_:representation in 4842) [ClassicSimilarity], result of:
0.06659072 = score(doc=4842,freq=4.0), product of:
0.11578492 = queryWeight, product of:
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.025165197 = queryNorm
0.57512426 = fieldWeight in 4842, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.0625 = fieldNorm(doc=4842)
0.071428575 = coord(1/14)
- Abstract
- Fortsetzung von pt.1: experimental retrieval results are presented as a function of the exhaustivity and similarity of the composite representations and reveal consistent patterns from which optimal performance levels can be identified. The optimal performance values provide an assessment of the absolute capacity of each composite representation to associate documents relevant to different queries in single-link hierarchies. The effectiveness of the exhaustive representation composed of references and citations is materially superior to the effectiveness of exhaustive composite representations that include subject descriptions
-
Shaw, W.M.: Subject and citation indexing : pt.1: the clustering structure of composite representations in the cystic fibrosis document collection (1991)
0.00
0.0035673599 = product of:
0.049943037 = sum of:
0.049943037 = weight(_text_:representation in 4841) [ClassicSimilarity], result of:
0.049943037 = score(doc=4841,freq=4.0), product of:
0.11578492 = queryWeight, product of:
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.025165197 = queryNorm
0.4313432 = fieldWeight in 4841, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.046875 = fieldNorm(doc=4841)
0.071428575 = coord(1/14)
- Abstract
- The presence of clustering structure in the CF document collection (cystic fibrosis) is evaluated as a function of the exhaustivity of 5 composite representations. The composite representations are constructed from 2 subject descriptions, based on MeSH and subheadings, and 2 citation indexes, based on the complete set of references an and a comprehensive set of citations to each document. Experiment results reveal observable evidence of clustering structure diminishes as the exhaustivity of each representation is decreased. The representation composed of references and citations shows less evidence of clustering structure at the exhaustive level but more uniform evidence of clustering structure over a wide range of exhaustivity levels than composite representations that include subject descriptions. The structures imposed on the CF document collection by all composite representations satisfy the necessary condition for a meaningful clustering outcome
-
Wouters, P.: ¬The signs of science (1998)
0.00
0.0033633395 = product of:
0.04708675 = sum of:
0.04708675 = weight(_text_:representation in 1023) [ClassicSimilarity], result of:
0.04708675 = score(doc=1023,freq=2.0), product of:
0.11578492 = queryWeight, product of:
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.025165197 = queryNorm
0.40667427 = fieldWeight in 1023, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.0625 = fieldNorm(doc=1023)
0.071428575 = coord(1/14)
- Abstract
- Since the 'Science Citation Index' emerged within the system of scientific communication in 1964, an intense controversy about its character has been raging: in what sense can citation analysis be trusted? This debate can be characterized as the confrontation of different perspectives on science. Discusses the citation representation of science: the way the citation creates a new reality of as well as in the world of science; the main features of this reality; and some implications for science and science policy
-
Leydesdorff, L.: Caveats for the use of citation indicators in research and journal evaluations (2008)
0.00
0.0025225044 = product of:
0.03531506 = sum of:
0.03531506 = weight(_text_:representation in 1361) [ClassicSimilarity], result of:
0.03531506 = score(doc=1361,freq=2.0), product of:
0.11578492 = queryWeight, product of:
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.025165197 = queryNorm
0.3050057 = fieldWeight in 1361, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.046875 = fieldNorm(doc=1361)
0.071428575 = coord(1/14)
- Abstract
- Aging of publications, percentage of self-citations, and impact vary from journal to journal within fields of science. The assumption that citation and publication practices are homogenous within specialties and fields of science is invalid. Furthermore, the delineation of fields and among specialties is fuzzy. Institutional units of analysis and persons may move between fields or span different specialties. The match between the citation index and institutional profiles varies among institutional units and nations. The respective matches may heavily affect the representation of the units. Non-Institute of Scientific Information (ISI) journals are increasingly cornered into transdisciplinary Mode-2 functions with the exception of specialist journals publishing in languages other than English. An externally cited impact factor can be calculated for these journals. The citation impact of non-ISI journals will be demonstrated using Science and Public Policy as the example.
-
Gabel, J.: Improving information retrieval of subjects through citation-analysis : a study (2006)
0.00
0.0021020873 = product of:
0.02942922 = sum of:
0.02942922 = weight(_text_:representation in 225) [ClassicSimilarity], result of:
0.02942922 = score(doc=225,freq=2.0), product of:
0.11578492 = queryWeight, product of:
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.025165197 = queryNorm
0.25417143 = fieldWeight in 225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.600994 = idf(docFreq=1206, maxDocs=44218)
0.0390625 = fieldNorm(doc=225)
0.071428575 = coord(1/14)
- Abstract
- Citation-chasing is proposed as a method of discovering additional terms to enhance subjectsearch retrieval. Subjects attached to OCLC records for cited works are compared to those attached to original citing sources. Citing sources were produced via a subject-list search in a library catalog using the LCSH "Language and languages-Origin." A subject-search was employed to avoid subjectivity in choosing sources. References from the sources were searched in OCLC where applicable, and the subject headings were retrieved. The subjects were ranked by citation-frequency and tiered into 3 groups in a Bradford-like distribution. Highly cited subjects were produced that were not revealed through the original search. A difference in relative importance among the subjects was also revealed. Broad extra-linguistic topics like evolution are more prominent than specific linguistic topics like phonology. There are exceptions, which appear somewhat predictable by the amount of imbalance in citation-representation among the 2 sources. Citation leaders were also produced for authors and secondary-source titles.
-
Nicolaisen, J.: Citation analysis (2007)
0.00
0.0012988712 = product of:
0.018184196 = sum of:
0.018184196 = product of:
0.05455259 = sum of:
0.05455259 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
0.05455259 = score(doc=6091,freq=2.0), product of:
0.08812423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.025165197 = 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)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 13. 7.2008 19:53:22
-
Døsen, K.: One more reference on self-reference (1992)
0.00
0.0012988712 = product of:
0.018184196 = sum of:
0.018184196 = product of:
0.05455259 = sum of:
0.05455259 = weight(_text_:22 in 4604) [ClassicSimilarity], result of:
0.05455259 = score(doc=4604,freq=2.0), product of:
0.08812423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.025165197 = queryNorm
0.61904186 = fieldWeight in 4604, 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=4604)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 7. 2.2005 14:10:22
-
Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
0.00
0.0011480509 = product of:
0.016072711 = sum of:
0.016072711 = product of:
0.04821813 = sum of:
0.04821813 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
0.04821813 = score(doc=3925,freq=4.0), product of:
0.08812423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.025165197 = 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)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 22. 7.2006 15:22:28
-
Williams, R.M.: ISI search network research front specialities (1983)
0.00
0.0011468288 = product of:
0.016055603 = sum of:
0.016055603 = product of:
0.048166804 = sum of:
0.048166804 = weight(_text_:29 in 445) [ClassicSimilarity], result of:
0.048166804 = score(doc=445,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.5441145 = fieldWeight in 445, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.109375 = fieldNorm(doc=445)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Source
- Deutscher Dokumentartag 1982, Lübeck-Travemünde, 29.-30.9.1982: Fachinformation im Zeitalter der Informationsindustrie. Bearb.: H. Strohl-Goebel
-
Remler, A.: Lässt sich wissenschaftliche Leistung messen? : Wer zitiert wird, liegt vorne - in den USA berechnet man Forschungsleistung nach einem Zitat-Index (2000)
0.00
0.0011468288 = product of:
0.016055603 = sum of:
0.016055603 = product of:
0.048166804 = sum of:
0.048166804 = weight(_text_:29 in 5392) [ClassicSimilarity], result of:
0.048166804 = score(doc=5392,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.5441145 = fieldWeight in 5392, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.109375 = fieldNorm(doc=5392)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 30.10.2000 17:47:29
-
Lindholm-Romantschuk, Y.: Scholarly book reviewing in the social sciences and humanities : the flow of ides within and among disciplines (1998)
0.00
8.1916346E-4 = product of:
0.011468288 = sum of:
0.011468288 = product of:
0.034404863 = sum of:
0.034404863 = weight(_text_:29 in 4063) [ClassicSimilarity], result of:
0.034404863 = score(doc=4063,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.38865322 = fieldWeight in 4063, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.078125 = fieldNorm(doc=4063)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 29. 3.1996 18:19:32
-
Garfield, E.; Stock, W.G.: Citation Consciousness : Interview with Eugene Garfiels, chairman emeritus of ISI; Philadelphia (2002)
0.00
8.1179454E-4 = product of:
0.011365123 = sum of:
0.011365123 = product of:
0.03409537 = sum of:
0.03409537 = weight(_text_:22 in 613) [ClassicSimilarity], result of:
0.03409537 = score(doc=613,freq=2.0), product of:
0.08812423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.025165197 = queryNorm
0.38690117 = fieldWeight in 613, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=613)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Source
- Password. 2002, H.6, S.22-25
-
Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009)
0.00
6.8883057E-4 = product of:
0.009643627 = sum of:
0.009643627 = product of:
0.02893088 = sum of:
0.02893088 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
0.02893088 = score(doc=2763,freq=4.0), product of:
0.08812423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.025165197 = 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)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 22. 3.2009 19:22:35
-
Pao, M.L.: Term and citation retrieval : a field study (1993)
0.00
6.553308E-4 = product of:
0.00917463 = sum of:
0.00917463 = product of:
0.027523888 = sum of:
0.027523888 = weight(_text_:29 in 3741) [ClassicSimilarity], result of:
0.027523888 = score(doc=3741,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.31092256 = fieldWeight in 3741, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0625 = fieldNorm(doc=3741)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Source
- Information processing and management. 29(1993) no.1, S.95-112
-
Rousseau, R.: Timelines in citation research (2006)
0.00
6.553308E-4 = product of:
0.00917463 = sum of:
0.00917463 = product of:
0.027523888 = sum of:
0.027523888 = weight(_text_:29 in 1746) [ClassicSimilarity], result of:
0.027523888 = score(doc=1746,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.31092256 = fieldWeight in 1746, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0625 = fieldNorm(doc=1746)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 18. 8.2006 14:29:40
-
Garfield, E.; Pudovkin, A.I.; Istomin, V.S.: Why do we need algorithmic historiography? (2003)
0.00
6.553308E-4 = product of:
0.00917463 = sum of:
0.00917463 = product of:
0.027523888 = sum of:
0.027523888 = weight(_text_:29 in 1606) [ClassicSimilarity], result of:
0.027523888 = score(doc=1606,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.31092256 = fieldWeight in 1606, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0625 = fieldNorm(doc=1606)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 29. 3.2003 19:52:23
-
Kurtz, M.J.; Eichhorn, G.; Accomazzi, A.; Grant, C.; Demleitner, M.; Henneken, E.; Murray, S.S.: ¬The effect of use and access on citations (2005)
0.00
6.553308E-4 = product of:
0.00917463 = sum of:
0.00917463 = product of:
0.027523888 = sum of:
0.027523888 = weight(_text_:29 in 1064) [ClassicSimilarity], result of:
0.027523888 = score(doc=1064,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.31092256 = fieldWeight in 1064, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0625 = fieldNorm(doc=1064)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 27.12.2007 17:16:29
-
Bensman, S.J.: Eugene Garfield, Francis Narin, and PageRank : the theoretical bases of the Google search engine (2013)
0.00
6.494356E-4 = product of:
0.009092098 = sum of:
0.009092098 = product of:
0.027276294 = sum of:
0.027276294 = weight(_text_:22 in 1149) [ClassicSimilarity], result of:
0.027276294 = score(doc=1149,freq=2.0), product of:
0.08812423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.025165197 = queryNorm
0.30952093 = fieldWeight in 1149, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1149)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Date
- 17.12.2013 11:02:22
-
East, J.W.: Citations to conference papers and the implications for cataloging (1985)
0.00
5.734144E-4 = product of:
0.008027801 = sum of:
0.008027801 = product of:
0.024083402 = sum of:
0.024083402 = weight(_text_:29 in 7928) [ClassicSimilarity], result of:
0.024083402 = score(doc=7928,freq=2.0), product of:
0.08852329 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.025165197 = queryNorm
0.27205724 = fieldWeight in 7928, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0546875 = fieldNorm(doc=7928)
0.33333334 = coord(1/3)
0.071428575 = coord(1/14)
- Source
- Library resources and technical services. 29(1985), S.189-194
