Global maps of science based on the new Web-of-Science categories.
Global maps of science based on the new Web-of-Science categories.
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DOI:
10.1007/s11192-012-0784-8
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发表时间:
2013-02
期刊:
影响因子:
3.9
通讯作者:
Rafols I
中科院分区:
文献类型:
--
作者:
Leydesdorff L;Carley S;Rafols I
In August 2011, Thomson Reuters launched version 5 of the Science and Social Science Citation Index in the Web of Science (WoS). Among other things, the 222 ISI Subject Categories (SCs) for these two databases in version 4 of WoS were renamed and extended to 225 WoS Categories (WCs). A new set of 151 Subject Areas was added, but at a higher level of aggregation. Perhaps confusingly, these Subject Areas are now abbreviated “SC” in the download, whereas “WC” is used for WoS Categories. Since we previously used the ISI SCs as the baseline for a global map in Pajek (Pajek is freely available at http://vlado.fmf.uni-lj.si/pub/networks/pajek/) (Rafols et al., Journal of the American Society for Information Science and Technology 61:1871–1887, 2010) and brought this facility online (at http://www.leydesdorff.net/overlaytoolkit), we recalibrated this map for the new WC categories using the Journal Citation Reports 2010. In the new installation, the base maps can also be made using VOSviewer (VOSviewer is freely available at http://www.VOSviewer.com/) (Van Eck and Waltman, Scientometrics 84:523–538, 2010).
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DOI:
10.1002/asi.21509
发表时间:
2011-05-01
影响因子:
--
作者:
Leydesdorff, Loet;Rafols, Ismael
通讯作者:
Rafols, Ismael
影响因子:
3.9
作者:
Porter, Alan L.;Rafols, Ismael
通讯作者:
Rafols, Ismael
影响因子:
2.5
作者:
Porter, Alan L.;Youtie, Jan
通讯作者:
Youtie, Jan
影响因子:
3.9
作者:
Carley, Stephen;Porter, Alan L.
通讯作者:
Porter, Alan L.
DOI:
10.1002/asi.20967
发表时间:
2009-02-01
影响因子:
--
作者:
Leydesdorff, Loet;Rafols, Ismael
通讯作者:
Rafols, Ismael