-
Shi, D.; Rousseau, R.; Yang, L.; Li, J.: ¬A journal's impact factor is influenced by changes in publication delays of citing journals (2017)
0.04
0.036979202 = product of:
0.073958404 = sum of:
0.073958404 = product of:
0.14791681 = sum of:
0.14791681 = weight(_text_:journals in 3441) [ClassicSimilarity], result of:
0.14791681 = score(doc=3441,freq=6.0), product of:
0.25656942 = queryWeight, product of:
5.021064 = idf(docFreq=792, maxDocs=44218)
0.05109862 = queryNorm
0.5765177 = fieldWeight in 3441, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
5.021064 = idf(docFreq=792, maxDocs=44218)
0.046875 = fieldNorm(doc=3441)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- In this article we describe another problem with journal impact factors by showing that one journal's impact factor is dependent on other journals' publication delays. The proposed theoretical model predicts a monotonically decreasing function of the impact factor as a function of publication delay, on condition that the citation curve of the journal is monotone increasing during the publication window used in the calculation of the journal impact factor; otherwise, this function has a reversed U shape. Our findings based on simulations are verified by examining three journals in the information sciences: the Journal of Informetrics, Scientometrics, and the Journal of the Association for Information Science and Technology.
-
Liu, X.; Bu, Y.; Li, M.; Li, J.: Monodisciplinary collaboration disrupts science more than multidisciplinary collaboration (2024)
0.02
0.021349952 = product of:
0.042699903 = sum of:
0.042699903 = product of:
0.08539981 = sum of:
0.08539981 = weight(_text_:journals in 1202) [ClassicSimilarity], result of:
0.08539981 = score(doc=1202,freq=2.0), product of:
0.25656942 = queryWeight, product of:
5.021064 = idf(docFreq=792, maxDocs=44218)
0.05109862 = queryNorm
0.33285263 = fieldWeight in 1202, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.021064 = idf(docFreq=792, maxDocs=44218)
0.046875 = fieldNorm(doc=1202)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Collaboration across disciplines is a critical form of scientific collaboration to solve complex problems and make innovative contributions. This study focuses on the association between multidisciplinary collaboration measured by coauthorship in publications and the disruption of publications measured by the Disruption (D) index. We used authors' affiliations as a proxy of the disciplines to which they belong and categorized an article into multidisciplinary collaboration or monodisciplinary collaboration. The D index quantifies the extent to which a study disrupts its predecessors. We selected 13 journals that publish articles in six disciplines from the Microsoft Academic Graph (MAG) database and then constructed regression models with fixed effects and estimated the relationship between the variables. The findings show that articles with monodisciplinary collaboration are more disruptive than those with multidisciplinary collaboration. Furthermore, we uncovered the mechanism of how monodisciplinary collaboration disrupts science more than multidisciplinary collaboration by exploring the references of the sampled publications.
-
Min, C.; Ding, Y.; Li, J.; Bu, Y.; Pei, L.; Sun, J.: Innovation or imitation : the diffusion of citations (2018)
0.02
0.017791625 = product of:
0.03558325 = sum of:
0.03558325 = product of:
0.0711665 = sum of:
0.0711665 = weight(_text_:journals in 4445) [ClassicSimilarity], result of:
0.0711665 = score(doc=4445,freq=2.0), product of:
0.25656942 = queryWeight, product of:
5.021064 = idf(docFreq=792, maxDocs=44218)
0.05109862 = queryNorm
0.2773772 = fieldWeight in 4445, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.021064 = idf(docFreq=792, maxDocs=44218)
0.0390625 = fieldNorm(doc=4445)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Citations in scientific literature are important both for tracking the historical development of scientific ideas and for forecasting research trends. However, the diffusion mechanisms underlying the citation process remain poorly understood, despite the frequent and longstanding use of citation counts for assessment purposes within the scientific community. Here, we extend the study of citation dynamics to a more general diffusion process to understand how citation growth associates with different diffusion patterns. Using a classic diffusion model, we quantify and illustrate specific diffusion mechanisms which have been proven to exert a significant impact on the growth and decay of citation counts. Experiments reveal a positive relation between the "low p and low q" pattern and high scientific impact. A sharp citation peak produced by rapid change of citation counts, however, has a negative effect on future impact. In addition, we have suggested a simple indicator, saturation level, to roughly estimate an individual article's current stage in the life cycle and its potential to attract future attention. The proposed approach can also be extended to higher levels of aggregation (e.g., individual scientists, journals, institutions), providing further insights into the practice of scientific evaluation.
-
Zhu, Q.; Kong, X.; Hong, S.; Li, J.; He, Z.: Global ontology research progress : a bibliometric analysis (2015)
0.01
0.012238529 = product of:
0.024477057 = sum of:
0.024477057 = product of:
0.048954114 = sum of:
0.048954114 = weight(_text_:22 in 2590) [ClassicSimilarity], result of:
0.048954114 = score(doc=2590,freq=4.0), product of:
0.17893866 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05109862 = queryNorm
0.27358043 = fieldWeight in 2590, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2590)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2015 18:30:22
17. 9.2018 18:22:23
-
Lin, X.; Li, J.; Zhou, X.: Theme creation for digital collections (2008)
0.01
0.012115525 = product of:
0.02423105 = sum of:
0.02423105 = product of:
0.0484621 = sum of:
0.0484621 = weight(_text_:22 in 2635) [ClassicSimilarity], result of:
0.0484621 = score(doc=2635,freq=2.0), product of:
0.17893866 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05109862 = queryNorm
0.2708308 = fieldWeight in 2635, 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=2635)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Metadata for semantic and social applications : proceedings of the International Conference on Dublin Core and Metadata Applications, Berlin, 22 - 26 September 2008, DC 2008: Berlin, Germany / ed. by Jane Greenberg and Wolfgang Klas
-
Li, J.; Shi, D.: Sleeping beauties in genius work : when were they awakened? (2016)
0.01
0.010384736 = product of:
0.020769471 = sum of:
0.020769471 = product of:
0.041538943 = sum of:
0.041538943 = weight(_text_:22 in 2647) [ClassicSimilarity], result of:
0.041538943 = score(doc=2647,freq=2.0), product of:
0.17893866 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05109862 = queryNorm
0.23214069 = fieldWeight in 2647, 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=2647)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 1.2016 14:13:32
-
Zheng, R.; Li, J.; Chen, H.; Huang, Z.: ¬A framework for authorship identification of online messages : writing-style features and classification techniques (2006)
0.01
0.008653947 = product of:
0.017307894 = sum of:
0.017307894 = product of:
0.03461579 = sum of:
0.03461579 = weight(_text_:22 in 5276) [ClassicSimilarity], result of:
0.03461579 = score(doc=5276,freq=2.0), product of:
0.17893866 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05109862 = queryNorm
0.19345059 = fieldWeight in 5276, 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=5276)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 16:14:37
