-
Diodato, V.: Dictionary of bibliometrics (1994)
0.08
0.083397575 = product of:
0.20849393 = sum of:
0.10953143 = weight(_text_:21 in 5666) [ClassicSimilarity], result of:
0.10953143 = score(doc=5666,freq=4.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.67767215 = fieldWeight in 5666, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.109375 = fieldNorm(doc=5666)
0.0989625 = weight(_text_:22 in 5666) [ClassicSimilarity], result of:
0.0989625 = score(doc=5666,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.5416616 = fieldWeight in 5666, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=5666)
0.4 = coord(2/5)
- Date
- 10. 6.1997 21:21:03
- Footnote
- Rez. in: Journal of library and information science 22(1996) no.2, S.116-117 (L.C. Smith)
-
Su, Y.; Han, L.-F.: ¬A new literature growth model : variable exponential growth law of literature (1998)
0.06
0.06211558 = product of:
0.15528895 = sum of:
0.055321723 = weight(_text_:21 in 3690) [ClassicSimilarity], result of:
0.055321723 = score(doc=3690,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.3422761 = fieldWeight in 3690, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.078125 = fieldNorm(doc=3690)
0.09996723 = weight(_text_:22 in 3690) [ClassicSimilarity], result of:
0.09996723 = score(doc=3690,freq=4.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.54716086 = fieldWeight in 3690, 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=3690)
0.4 = coord(2/5)
- Date
- 2. 3.1997 12:16:21
22. 5.1999 19:22:35
-
Chongde, W.; Zhe, W.: Evaluation of the models for Bradford's law (1998)
0.04
0.040322956 = product of:
0.10080738 = sum of:
0.04425738 = weight(_text_:21 in 3688) [ClassicSimilarity], result of:
0.04425738 = score(doc=3688,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.27382088 = fieldWeight in 3688, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0625 = fieldNorm(doc=3688)
0.056550004 = weight(_text_:22 in 3688) [ClassicSimilarity], result of:
0.056550004 = score(doc=3688,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.30952093 = fieldWeight in 3688, 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=3688)
0.4 = coord(2/5)
- Date
- 2. 3.1997 12:16:21
22. 5.1999 19:12:28
-
Tijssen, R.J.W.; Wijk, E. van: ¬The global science base of information and communication technologies : bibliometric analysis of ICT research papers (1998)
0.04
0.040322956 = product of:
0.10080738 = sum of:
0.04425738 = weight(_text_:21 in 3691) [ClassicSimilarity], result of:
0.04425738 = score(doc=3691,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.27382088 = fieldWeight in 3691, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0625 = fieldNorm(doc=3691)
0.056550004 = weight(_text_:22 in 3691) [ClassicSimilarity], result of:
0.056550004 = score(doc=3691,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.30952093 = fieldWeight in 3691, 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=3691)
0.4 = coord(2/5)
- Date
- 2. 3.1997 12:16:21
22. 5.1999 19:26:54
-
Falkingham, L.T.; Reeves, R.: Context analysis : a technique for analysing research in a field, applied to literature on the management of R&D at the section level (1998)
0.04
0.035282582 = product of:
0.088206455 = sum of:
0.03872521 = weight(_text_:21 in 3689) [ClassicSimilarity], result of:
0.03872521 = score(doc=3689,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.23959327 = fieldWeight in 3689, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0546875 = fieldNorm(doc=3689)
0.04948125 = weight(_text_:22 in 3689) [ClassicSimilarity], result of:
0.04948125 = score(doc=3689,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.2708308 = fieldWeight in 3689, 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=3689)
0.4 = coord(2/5)
- Date
- 2. 3.1997 12:16:21
22. 5.1999 19:18:46
-
Ding, Y.: Applying weighted PageRank to author citation networks (2011)
0.04
0.035282582 = product of:
0.088206455 = sum of:
0.03872521 = weight(_text_:21 in 4188) [ClassicSimilarity], result of:
0.03872521 = score(doc=4188,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.23959327 = fieldWeight in 4188, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0546875 = fieldNorm(doc=4188)
0.04948125 = weight(_text_:22 in 4188) [ClassicSimilarity], result of:
0.04948125 = score(doc=4188,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.2708308 = fieldWeight in 4188, 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=4188)
0.4 = coord(2/5)
- Date
- 22. 1.2011 13:02:21
-
Vieira, E.S.; Cabral, J.A.S.; Gomes, J.A.N.F.: Definition of a model based on bibliometric indicators for assessing applicants to academic positions (2014)
0.04
0.035282582 = product of:
0.088206455 = sum of:
0.03872521 = weight(_text_:21 in 1221) [ClassicSimilarity], result of:
0.03872521 = score(doc=1221,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.23959327 = fieldWeight in 1221, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0546875 = fieldNorm(doc=1221)
0.04948125 = weight(_text_:22 in 1221) [ClassicSimilarity], result of:
0.04948125 = score(doc=1221,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.2708308 = fieldWeight in 1221, 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=1221)
0.4 = coord(2/5)
- Date
- 18. 3.2014 18:22:21
-
Hicks, D.; Wang, J.: Coverage and overlap of the new social sciences and humanities journal lists (2011)
0.03
0.030242214 = product of:
0.075605534 = sum of:
0.033193033 = weight(_text_:21 in 4192) [ClassicSimilarity], result of:
0.033193033 = score(doc=4192,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.20536566 = fieldWeight in 4192, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.046875 = fieldNorm(doc=4192)
0.0424125 = weight(_text_:22 in 4192) [ClassicSimilarity], result of:
0.0424125 = score(doc=4192,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.23214069 = fieldWeight in 4192, 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=4192)
0.4 = coord(2/5)
- Date
- 22. 1.2011 13:21:28
-
Frandsen, T.F.; Nicolaisen, J.: ¬The ripple effect : citation chain reactions of a nobel prize (2013)
0.03
0.030242214 = product of:
0.075605534 = sum of:
0.033193033 = weight(_text_:21 in 654) [ClassicSimilarity], result of:
0.033193033 = score(doc=654,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.20536566 = fieldWeight in 654, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.046875 = fieldNorm(doc=654)
0.0424125 = weight(_text_:22 in 654) [ClassicSimilarity], result of:
0.0424125 = score(doc=654,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.23214069 = fieldWeight in 654, 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=654)
0.4 = coord(2/5)
- Date
- 22. 3.2013 16:21:09
-
Kronegger, L.; Mali, F.; Ferligoj, A.; Doreian, P.: Classifying scientific disciplines in Slovenia : a study of the evolution of collaboration structures (2015)
0.03
0.030242214 = product of:
0.075605534 = sum of:
0.033193033 = weight(_text_:21 in 1639) [ClassicSimilarity], result of:
0.033193033 = score(doc=1639,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.20536566 = fieldWeight in 1639, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.046875 = fieldNorm(doc=1639)
0.0424125 = weight(_text_:22 in 1639) [ClassicSimilarity], result of:
0.0424125 = score(doc=1639,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.23214069 = fieldWeight in 1639, 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=1639)
0.4 = coord(2/5)
- Date
- 21. 1.2015 14:55:22
-
Milard, B.; Pitarch, Y.: Egocentric cocitation networks and scientific papers destinies (2023)
0.03
0.030242214 = product of:
0.075605534 = sum of:
0.033193033 = weight(_text_:21 in 918) [ClassicSimilarity], result of:
0.033193033 = score(doc=918,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.20536566 = fieldWeight in 918, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.046875 = fieldNorm(doc=918)
0.0424125 = weight(_text_:22 in 918) [ClassicSimilarity], result of:
0.0424125 = score(doc=918,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.23214069 = fieldWeight in 918, 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=918)
0.4 = coord(2/5)
- Date
- 21. 3.2023 19:22:14
-
Liu, D.-R.; Shih, M.-J.: Hybrid-patent classification based on patent-network analysis (2011)
0.03
0.025201846 = product of:
0.06300461 = sum of:
0.027660862 = weight(_text_:21 in 4189) [ClassicSimilarity], result of:
0.027660862 = score(doc=4189,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.17113805 = fieldWeight in 4189, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0390625 = fieldNorm(doc=4189)
0.03534375 = weight(_text_:22 in 4189) [ClassicSimilarity], result of:
0.03534375 = score(doc=4189,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.19345059 = fieldWeight in 4189, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=4189)
0.4 = coord(2/5)
- Date
- 22. 1.2011 13:04:21
-
Heneberg, P.: Supposedly uncited articles of Nobel laureates and Fields medalists can be prevalently attributed to the errors of omission and commission (2013)
0.03
0.025201846 = product of:
0.06300461 = sum of:
0.027660862 = weight(_text_:21 in 660) [ClassicSimilarity], result of:
0.027660862 = score(doc=660,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.17113805 = fieldWeight in 660, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0390625 = fieldNorm(doc=660)
0.03534375 = weight(_text_:22 in 660) [ClassicSimilarity], result of:
0.03534375 = score(doc=660,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.19345059 = fieldWeight in 660, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=660)
0.4 = coord(2/5)
- Date
- 22. 3.2013 19:21:46
-
Cerda-Cosme, R.; Méndez, E.: Analysis of shared research data in Spanish scientific papers about COVID-19 : a first approach (2023)
0.03
0.025201846 = product of:
0.06300461 = sum of:
0.027660862 = weight(_text_:21 in 916) [ClassicSimilarity], result of:
0.027660862 = score(doc=916,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.17113805 = fieldWeight in 916, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0390625 = fieldNorm(doc=916)
0.03534375 = weight(_text_:22 in 916) [ClassicSimilarity], result of:
0.03534375 = score(doc=916,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.19345059 = fieldWeight in 916, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=916)
0.4 = coord(2/5)
- Date
- 21. 3.2023 19:22:02
-
Vakkari, P.; Järvelin, K.; Chang, Y.-W.: ¬The association of disciplinary background with the evolution of topics and methods in Library and Information Science research 1995-2015 (2023)
0.03
0.025201846 = product of:
0.06300461 = sum of:
0.027660862 = weight(_text_:21 in 998) [ClassicSimilarity], result of:
0.027660862 = score(doc=998,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.17113805 = fieldWeight in 998, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.0390625 = fieldNorm(doc=998)
0.03534375 = weight(_text_:22 in 998) [ClassicSimilarity], result of:
0.03534375 = score(doc=998,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.19345059 = fieldWeight in 998, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=998)
0.4 = coord(2/5)
- Abstract
- The paper reports a longitudinal analysis of the topical and methodological development of Library and Information Science (LIS). Its focus is on the effects of researchers' disciplines on these developments. The study extends an earlier cross-sectional study (Vakkari et al., Journal of the Association for Information Science and Technology, 2022a, 73, 1706-1722) by a coordinated dataset representing a content analysis of articles published in 31 scholarly LIS journals in 1995, 2005, and 2015. It is novel in its coverage of authors' disciplines, topical and methodological aspects in a coordinated dataset spanning two decades thus allowing trend analysis. The findings include a shrinking trend in the share of LIS from 67 to 36% while Computer Science, and Business and Economics increase their share from 9 and 6% to 21 and 16%, respectively. The earlier cross-sectional study (Vakkari et al., Journal of the Association for Information Science and Technology, 2022a, 73, 1706-1722) for the year 2015 identified three topical clusters of LIS research, focusing on topical subfields, methodologies, and contributing disciplines. Correspondence analysis confirms their existence already in 1995 and traces their development through the decades. The contributing disciplines infuse their concepts, research questions, and approaches to LIS and may also subsume vital parts of LIS in their own structures of knowledge production.
- Date
- 22. 6.2023 18:15:06
-
Nicholls, P.T.: Empirical validation of Lotka's law (1986)
0.02
0.022620002 = product of:
0.11310001 = sum of:
0.11310001 = weight(_text_:22 in 5509) [ClassicSimilarity], result of:
0.11310001 = score(doc=5509,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.61904186 = fieldWeight in 5509, 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=5509)
0.2 = coord(1/5)
- Source
- Information processing and management. 22(1986), S.417-419
-
Nicolaisen, J.: Citation analysis (2007)
0.02
0.022620002 = product of:
0.11310001 = sum of:
0.11310001 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
0.11310001 = score(doc=6091,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = 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)
0.2 = coord(1/5)
- Date
- 13. 7.2008 19:53:22
-
Fiala, J.: Information flood : fiction and reality (1987)
0.02
0.022620002 = product of:
0.11310001 = sum of:
0.11310001 = weight(_text_:22 in 1080) [ClassicSimilarity], result of:
0.11310001 = score(doc=1080,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.61904186 = fieldWeight in 1080, 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=1080)
0.2 = coord(1/5)
- Source
- Thermochimica acta. 110(1987), S.11-22
-
Tonta, Y.; Ünal, Y.: Scatter of journals and literature obsolescence reflected in document delivery requests (2005)
0.02
0.020161478 = product of:
0.05040369 = sum of:
0.02212869 = weight(_text_:21 in 3271) [ClassicSimilarity], result of:
0.02212869 = score(doc=3271,freq=2.0), product of:
0.16162895 = queryWeight, product of:
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.052173212 = queryNorm
0.13691044 = fieldWeight in 3271, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0979297 = idf(docFreq=5425, maxDocs=44218)
0.03125 = fieldNorm(doc=3271)
0.028275002 = weight(_text_:22 in 3271) [ClassicSimilarity], result of:
0.028275002 = score(doc=3271,freq=2.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = queryNorm
0.15476047 = fieldWeight in 3271, 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=3271)
0.4 = coord(2/5)
- Abstract
- In this paper we investigate the scattering of journals and literature obsolescence reflected in more than 137,000 document delivery requests submitted to a national document delivery service. We first summarize the major findings of the study with regards to the performance of the service. We then identify the "core" journals from which article requests were satisfied and address the following research questions: (a) Does the distribution of (core) journals conform to the Bradford's Law of Scattering? (b) Is there a relationship between usage of journals and impact factors, journals with high impact factors being used more often than the rest? (c) Is there a relationship between usage of journals and total citation counts, journals with high total citation counts being used more often than the rest? (d) What is the median age of use (half-life) of requested articles in general? (e) Do requested articles that appear in core journals get obsolete more slowly? (f) Is there a relationship between obsolescence and journal impact factors, journals with high impact factors being obsolete more slowly? (g) Is there a relationship between obsolescence and total citation counts, journals with high total citation counts being obsolete more slowly? Based an the analysis of findings, we found that the distribution of highly and moderately used journal titles conform to Bradford's Law. The median age of use was 8 years for all requested articles. Ninety percent of the articles requested were 21 years of age or younger. Articles that appeared in 168 core journal titles seem to get obsolete slightly more slowly than those of all titles. We observed no statistically significant correlations between the frequency of journal use and ISI journal impact factors, and between the frequency of journal use and ISI- (Institute for Scientific Information, Philadelphia, PA) cited half-lives for the most heavily used 168 core journal titles. There was a weak correlation between usage of journals and ISI-reported total citation counts. No statistically significant relationship was found between median age of use and journal impact factors and between median age of use and total citation counts. There was a weak negative correlation between ISI journal impact factors and cited half-lives of 168 core journals, and a weak correlation between ISI citation halflives and use half-lives of core journals. No correlation was found between cited half-lives of 168 core journals and their corresponding total citation counts as reported by ISI. Findings of the current study are discussed along with those of other studies.
- Date
- 20. 3.2005 10:54:22
-
Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
0.02
0.019993445 = product of:
0.09996723 = sum of:
0.09996723 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
0.09996723 = score(doc=3925,freq=4.0), product of:
0.1827017 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052173212 = 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)
0.2 = coord(1/5)
- Date
- 22. 7.2006 15:22:28
