24 citations · 65 across the 36 of their papers we have counts for
24 papers · 1 filter
The Generation of Large Networks from Web-of-Science Data
Loet Leydesdorff, Gohar Feroz Khan, Lutz Bornmann
During the 1990s, one of us developed a series of freeware routines (http://www.leydesdorff.net/indicators) that enable the user to organize downloads from the Web-of-Science (Thom…
The Operationalization of "Fields" as WoS Subject Categories (WCs) in Evaluative Bibliometrics: The cases of "Library and Information Science" and "Science & Technology Studies"
Loet Leydesdorff, Lutz Bornmann
Normalization of citation scores using reference sets based on Web-of-Science Subject Categories (WCs) has become an established ("best") practice in evaluative bibliometrics. For…
Matching MEDLINE/PubMed Data with Web of Science (WoS): A Routine in R language
Daniele Rotolo, Loet Leydesdorff
We present a novel routine, namely medlineR, based on R-language, that enables the user to match data from MEDLINE/PubMed with records indexed in the ISI Web of Science (WoS) datab…
How Can Journal Impact Factors be Normalized across Fields of Science? An Assessment in terms of Percentile Ranks and Fractional Counts
Loet Leydesdorff, Ping Zhou, Lutz Bornmann
Using the CD-ROM version of the Science Citation Index 2010 (N = 3,705 journals), we study the (combined) effects of (i) fractional counting on the impact factor (IF) and (ii) tran…
Statistics for the Dynamic Analysis of Scientometric Data: The evolution of the sciences in terms of trajectories and regimes
Loet Leydesdorff
The gap in statistics between multi-variate and time-series analysis can be bridged by using entropy statistics and recent developments in multi-dimensional scaling. For explaining…
An Integrated Impact Indicator (I3): A New Definition of "Impact" with Policy Relevance
Caroline S. Wagner, Loet Leydesdorff
Allocation of research funding, as well as promotion and tenure decisions, are increasingly made using indicators and impact factors drawn from citations to published work. A debat…