TY - GEN
T1 - Interactive overlays of journals and the measurement of interdisciplinarity
AU - Leydesdorff, Loet
AU - Rafols, Ismael
AU - Chen, Chaomei
PY - 2013
Y1 - 2013
N2 - Document sets downloaded from the Web of Science can be projected onto global journal maps based on all journals contained in the Journal Citation Reports (JCR) of the Science and Social Science Citation Indices (2011). The disciplinary diversity of a downloaded set is then measured in terms of this map using Rao-Stirling's "quadratic entropy." Since this indicator of interdisciplinarity is normalized between zero and one, the interdisciplinarity of document sets can be compared among one another and across years, both cited and citing. The colors used for the overlays are based on Blondel et al.'s (2008) community-finding algorithms operating on the 10,000+ journals included in JCRs. The results can be exported from VOSViewer with different options such as proportional labels, heat maps, or cluster density maps. The maps can also be web-started and/or animated (e.g., using PowerPoint). The "citing" dimension of the aggregated journal-journal citation matrix was found to provide a more comprehensive description than the matrix based on the cited archive.
AB - Document sets downloaded from the Web of Science can be projected onto global journal maps based on all journals contained in the Journal Citation Reports (JCR) of the Science and Social Science Citation Indices (2011). The disciplinary diversity of a downloaded set is then measured in terms of this map using Rao-Stirling's "quadratic entropy." Since this indicator of interdisciplinarity is normalized between zero and one, the interdisciplinarity of document sets can be compared among one another and across years, both cited and citing. The colors used for the overlays are based on Blondel et al.'s (2008) community-finding algorithms operating on the 10,000+ journals included in JCRs. The results can be exported from VOSViewer with different options such as proportional labels, heat maps, or cluster density maps. The maps can also be web-started and/or animated (e.g., using PowerPoint). The "citing" dimension of the aggregated journal-journal citation matrix was found to provide a more comprehensive description than the matrix based on the cited archive.
UR - http://www.scopus.com/inward/record.url?scp=84896858580&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84896858580&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84896858580
SN - 9783200031357
T3 - Proceedings of ISSI 2013 - 14th International Society of Scientometrics and Informetrics Conference
SP - 1037
EP - 1052
BT - Proceedings of ISSI 2013 - 14th International Society of Scientometrics and Informetrics Conference
T2 - 14th International Society of Scientometrics and Informetrics Conference, ISSI 2013
Y2 - 15 July 2013 through 20 July 2013
ER -