-
Crespo, J.A.; Herranz, N.; Li, Y.; Ruiz-Castillo, J.: ¬The effect on citation inequality of differences in citation practices at the web of science subject category level (2014)
0.02
0.019295435 = product of:
0.03859087 = sum of:
0.03859087 = sum of:
0.0024625852 = weight(_text_:s in 1291) [ClassicSimilarity], result of:
0.0024625852 = score(doc=1291,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.060061958 = fieldWeight in 1291, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=1291)
0.036128286 = weight(_text_:22 in 1291) [ClassicSimilarity], result of:
0.036128286 = score(doc=1291,freq=4.0), product of:
0.13205728 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03771094 = queryNorm
0.27358043 = fieldWeight in 1291, 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=1291)
0.5 = coord(1/2)
- Abstract
- This article studies the impact of differences in citation practices at the subfield, or Web of Science subject category level, using the model introduced in Crespo, Li, and Ruiz-Castillo (2013a), according to which the number of citations received by an article depends on its underlying scientific influence and the field to which it belongs. We use the same Thomson Reuters data set of about 4.4 million articles used in Crespo et al. (2013a) to analyze 22 broad fields. The main results are the following: First, when the classification system goes from 22 fields to 219 subfields the effect on citation inequality of differences in citation practices increases from ?14% at the field level to 18% at the subfield level. Second, we estimate a set of exchange rates (ERs) over a wide [660, 978] citation quantile interval to express the citation counts of articles into the equivalent counts in the all-sciences case. In the fractional case, for example, we find that in 187 of 219 subfields the ERs are reliable in the sense that the coefficient of variation is smaller than or equal to 0.10. Third, in the fractional case the normalization of the raw data using the ERs (or subfield mean citations) as normalization factors reduces the importance of the differences in citation practices from 18% to 3.8% (3.4%) of overall citation inequality. Fourth, the results in the fractional case are essentially replicated when we adopt a multiplicative approach.
- Source
- Journal of the Association for Information Science and Technology. 65(2014) no.6, S.1244-1256
-
Li, Y.; Xu, S.; Luo, X.; Lin, S.: ¬A new algorithm for product image search based on salient edge characterization (2014)
0.00
0.0010663308 = product of:
0.0021326616 = sum of:
0.0021326616 = product of:
0.0042653233 = sum of:
0.0042653233 = weight(_text_:s in 1552) [ClassicSimilarity], result of:
0.0042653233 = score(doc=1552,freq=6.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.10403037 = fieldWeight in 1552, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=1552)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 65(2014) no.12, S.2534-2551
-
Cao, Q.; Lu, Y.; Dong, D.; Tang, Z.; Li, Y.: ¬The roles of bridging and bonding in social media communities (2013)
0.00
7.387756E-4 = product of:
0.0014775512 = sum of:
0.0014775512 = product of:
0.0029551024 = sum of:
0.0029551024 = weight(_text_:s in 1009) [ClassicSimilarity], result of:
0.0029551024 = score(doc=1009,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.072074346 = fieldWeight in 1009, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=1009)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 64(2013) no.8, S.1671-1681
-
Song, J.; Huang, Y.; Qi, X.; Li, Y.; Li, F.; Fu, K.; Huang, T.: Discovering hierarchical topic evolution in time-stamped documents (2016)
0.00
7.387756E-4 = product of:
0.0014775512 = sum of:
0.0014775512 = product of:
0.0029551024 = sum of:
0.0029551024 = weight(_text_:s in 2853) [ClassicSimilarity], result of:
0.0029551024 = score(doc=2853,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.072074346 = fieldWeight in 2853, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=2853)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 67(2016) no.4, S.915-927
-
Luo, P.; Chen, K.; Wu, C.; Li, Y.: Exploring the social influence of multichannel access in an online health community (2018)
0.00
7.387756E-4 = product of:
0.0014775512 = sum of:
0.0014775512 = product of:
0.0029551024 = sum of:
0.0029551024 = weight(_text_:s in 4033) [ClassicSimilarity], result of:
0.0029551024 = score(doc=4033,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.072074346 = fieldWeight in 4033, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=4033)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 69(2018) no.1, S.98-109
-
Liu, J.; Li, Y.; Hastings, S.K.: Simplified scheme of search task difficulty reasons (2019)
0.00
7.387756E-4 = product of:
0.0014775512 = sum of:
0.0014775512 = product of:
0.0029551024 = sum of:
0.0029551024 = weight(_text_:s in 5224) [ClassicSimilarity], result of:
0.0029551024 = score(doc=5224,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.072074346 = fieldWeight in 5224, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=5224)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 70(2019) no.5, S.526-529
-
Li, Y.; Belkin, N.J.: ¬An exploration of the relationships between work task and interactive information search behavior (2010)
0.00
6.156463E-4 = product of:
0.0012312926 = sum of:
0.0012312926 = product of:
0.0024625852 = sum of:
0.0024625852 = weight(_text_:s in 3980) [ClassicSimilarity], result of:
0.0024625852 = score(doc=3980,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.060061958 = fieldWeight in 3980, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=3980)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 61(2010) no.9, S.1771-1789
-
Yang, M.; Kiang, M.; Chen, H.; Li, Y.: Artificial immune system for illicit content identification in social media (2012)
0.00
6.156463E-4 = product of:
0.0012312926 = sum of:
0.0012312926 = product of:
0.0024625852 = sum of:
0.0024625852 = weight(_text_:s in 4980) [ClassicSimilarity], result of:
0.0024625852 = score(doc=4980,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.060061958 = fieldWeight in 4980, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=4980)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 63(2012) no.2, S.256-269
-
Shen, J.; Yao, L.; Li, Y.; Clarke, M.; Wang, L.; Li, D.: Visualizing the history of evidence-based medicine : a bibliometric analysis (2013)
0.00
6.156463E-4 = product of:
0.0012312926 = sum of:
0.0012312926 = product of:
0.0024625852 = sum of:
0.0024625852 = weight(_text_:s in 1090) [ClassicSimilarity], result of:
0.0024625852 = score(doc=1090,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.060061958 = fieldWeight in 1090, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=1090)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 64(2013) no.10, S.2157-2172
-
Arora, S.K.; Li, Y.; Youtie, J.; Shapira, P.: Using the wayback machine to mine websites in the social sciences : a methodological resource (2016)
0.00
6.156463E-4 = product of:
0.0012312926 = sum of:
0.0012312926 = product of:
0.0024625852 = sum of:
0.0024625852 = weight(_text_:s in 3050) [ClassicSimilarity], result of:
0.0024625852 = score(doc=3050,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.060061958 = fieldWeight in 3050, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=3050)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 67(2016) no.8, S.1904-1915
-
Xiao, D.; Ji, Y.; Li, Y.; Zhuang, F.; Shi, C.: Coupled matrix factorization and topic modeling for aspect mining (2018)
0.00
6.156463E-4 = product of:
0.0012312926 = sum of:
0.0012312926 = product of:
0.0024625852 = sum of:
0.0024625852 = weight(_text_:s in 5042) [ClassicSimilarity], result of:
0.0024625852 = score(doc=5042,freq=2.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.060061958 = fieldWeight in 5042, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=5042)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information processing and management. 54(2018) no.6, S.861-873
