345 citations · 2k across the 154 of their papers we have counts for
23 papers · 2 filters
The "Tournaments" Metaphor in Citation Impact Studies: Power-Weakness Ratios (PWR) as a Journal Indicator
Loet Leydesdorff, Wouter de Nooy, Lutz Bornmann
Ramanujacharyulu's (1964) Power-Weakness Ratio (PWR) measures impact by recursively multiplying the citation matrix by itself until convergence is reached in both the cited and cit…
Study of Citation Networks in Tribology Research
Bakthavachalam Elango, Lutz Bornmann, Subramaniam Shankar
CitNetExplorer has been used to study the citation networks among the scientific publications on tribology during the 15 years period from 1998-2012. Three data sets from Web of Sc…
Philosophy of science viewed through the lense of "References Publication Years spectrosopy" (RPYS)
K. Brad Wray, Lutz Bornmann
We examine the sub-field of philosophy of science using a new method developed in information science, Referenced Publication Years Spectroscopy (RPYS). RPYS allows us to identify…
A macro level scientometric analysis of world tribology research output (1998 - 2012)
Bakthavachalam Elango, Periyaswamy Rajendran, Lutz Bornmann
Bibliographic records related to tribology research were extracted from SCOPUS and Web of Science databases for the period of 15 years from 1998 to 2012. Macro-level scientometric…
Methods for the generation of normalized citation impact scores in bibliometrics: Which method best reflects the judgements of experts?
Lutz Bornmann, Werner Marx
Evaluative bibliometrics compares the citation impact of researchers, research groups and institutions with each other across time scales and disciplines. Both factors - discipline…
Measuring impact in research evaluations: A thorough discussion of methods for, effects of, and problems with impact measurements
Lutz Bornmann
Impact of science is one of the most important topics in scientometrics. Recent developments show a fundamental change in impact measurements from impact on science to impact on so…