A number of journal classification systems have been developed in bibliometrics since the launch of the Citation Indices by the Institute of Scientific Information (ISI) in the 1960s. The best known system is the so-called “Web-of-Science Subject Categories” (WCs). Each system has its own advantages and disadvantages. Using the Journal Citation Reports 2014 of the Science Citation Index and the...

Introduction: Traditional citation analysis has been greatly criticized because the process of citation accumulation requires considerable time after publication. So, the term “altmetrics” was proposed in 2010 to measure the scientific and social impact of a paper.We performed a search for certain nuclear medicine topics using the altmetrics approach to report the correlation b...

Aggregated journal-journal citation networks based on the Journal Citation Reports 2004 of the Science Citation Index (5968 journals) and the Social Science Citation Index (1712 journals) are made accessible from the perspective of any of these journals. A vectorspace model is used for normalization, and the results are brought online at http://www.leydesdorff.net/jcr04 as input-files for the v...

Australian Business Deans Council (ABDC); Bacon’s Media Directory; Cabell’s Directories; Compendex (Elsevier Engineering Index); CSA Illumina; DBLP; Gale Directory of Publications & Broadcast Media; GetCited; Google Scholar; INSPEC; JournalTOCs; Library & Information Science Abstracts (LISA); MediaFinder; Norwegian Social Science Data Services (NSD); SCOPUS; The Index of Information Systems Jou...

This literature review describes web indicators for the impact of books, software, datasets, videos and other non-standard academic outputs. Although journal articles dominate academic research in the health and natural sciences, other types of outputs can make equally valuable contributions to scholarship and are more common in other fields. It is not always possible to get useful citation-bas...

Eugene Garfield’s ideas on citation indexing were gradually shaped over the course of the 1950s by his exposure to the thinking of various individuals such as J. D. Bernal, H. G. Wells, Chauncey Leake, William Adair, and Joshua Lederberg. Two key concepts emerged during this early period which guided his later work: the importance of interdisciplinary or cross-disciplinary research and the noti...

ed/Indexed in ISI Thomson Science Citation Index Expanded, Cambridge Scientific Abstracts, Compendex, Current