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The Chemistry Citation Index was first introduced by Eugene Garfield, a chemist by training. His original "search examples were based on [his] experience as a chemist". [17] In 1992, an electronic and print form of the index was derived from a core of 330 chemistry journals, within which all areas were covered.
It is a size-independent indicator and its values order journals by their "average prestige per article" and can be used for journal comparisons in science evaluation processes. The SJR indicator is a free journal metric inspired by, and using an algorithm similar to, PageRank .
ISI maintained citation databases covering thousands of academic journals, including a continuation of its longtime print-based indexing service the Science Citation Index (SCI), as well as the Social Sciences Citation Index (SSCI) and the Arts and Humanities Citation Index (AHCI).
In 1961 Garfield received a grant from the U.S. National Institutes of Health to compile a citation index for Genetics. To do so, Garfield's team gathered 1.4 million citations from 613 journals. [8] From this work, Garfield and the ISI produced the first version of the Science Citation Index, published as a book in 1963. [10]
A gateway to results of DOE research and development and major R&D accomplishments of interest to DOE. Free United States Department of Energy, Office of Scientific and Technical Information. [133] Science Citation Index: Science (General) Part of Web of Science: Subscription Clarivate Analytics: ScienceOpen: Multidisciplinary
The countries with the highest share of articles published in scientific journals according to the Nature Index 2024, which is valid for the calendar year 2023. [2] The "count" is the total number of articles to which nationals of the country have contributed.
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The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.