Perfomance Index


Performance Index

  • Impact Factor is one of the journals indexes that can be searched by Clarivate Analytics in the Journal Citation Reports. It calculates only the journals indexed to the Web of Science for three consecutive years. If the current SCI (E) journal is not listed for 3 consecutive years, the Impact Factor value may not be available

    According to Clarivate Analytics’s database, the journal of SCI / SCIE / SSCI / A & HCI is listed in the Web of Science. Based on the citation information of Web of Science, various indexes of JCR are calculated It’s possible

    JWhile the Web of Science can cite citations to specific articles, the JCR can see the authority of specific journals. 

    Journal Citation Reports consists of a Science edition and a Social Science edition. After a new version is released at the end of June every year, it is revised for about four months and the final index is set at the end of October. As of 2014, JCR 2012, the latest edition, provides a quotation index for 8,471 scientific journals in the Science edition and a quotation index for 3,047 journals in the social science journal. Journals listed in both editions can be duplicated.

    Social Science edition provides academic journals in the social sciences, but it contains a number of journals in the fields of Nursing, Psychiatry, Rehabilitation, Social Science: Biomedical and Substance Abuse.

    [Impact Factor view screen]

    [Output formula] 
    The number of citations published in the previous two years of the JCR edition year divided by the number of citations in the JCR edition year 

  • An index that measures the research results of researchers published by Jorge Hirsch, a physicist at the University of California, San Diego campus in 2005, based on the number of researchers’ papers and the number of citations for each paper. The method of calculation is h -Index of the researcher’s ranking of the last thesis in which the number of citations is greater than or equal to the thesis rank after arranging the individual theses in reverse order of cited citations. 

    h -Index has the advantage of simple formula, easy calculation method and strong index, but it is influenced by self-citation and has a low discrimination power due to frequent tie values. There is a problem that the h -index becomes high because it is likely to become large.

    h -Index can be easily confirmed by author search in Web of Science or SCOPUS, but it is difficult to calculate accurate h -Index of researcher because author search of both DBs is not perfect. In order to supplement these problems, the medical library has applied a service to calculate accurate h- indexes for YRI-registered papers.

  • Eigenfactor Score / Article Influence Score is an index of influences of journals developed by Professor Carl Bergstrom of the University of Washington, Department of Biology, based on the total number of articles and the number of citations published in the journal for five years. Unlike the Impact Factor, however, it does not include self citations and does not distinguish between scientific and social sciences. 

    The Eigenfactor Score is measured by varying the weight of the score according to the citation index of the journal. The weights vary depending on whether the journals under evaluation are influenced by other journals or whether they are cited in influential journals such as Nature or Cell. The higher the eigenfactor score, the greater the influence of journals. The Eigenfactor Score is calculated from the sum of the Eigenfactor Scores of all the journals in the JCR as 100, and the journal with the highest Eigenfactor Score among the total of 10,000 in the JCR2012 is Nature 1.56539. 

    The Article Influence Score measures the average impact of a journal article. JCR is a journal in which the average of all journals is set to 1, and journals are used more than average if they are larger than 1, and journals that are used less than average if journals are smaller than 1. Of the 10,000 total species included in JCR 2012, the highest Article Influence Score is the Reviews of Modern Physics, which is 32.565, which means that it has 32 times more influence than the average journals listed in JCR. 

    As of January 2014, the Eigenfactor homepage ( allows searches from 1997 to 2011, Journal Citation Reports ( You can search from 2007 edition to 2012 edition.

    [Eigenfactor Score View on Eigenfactor Homepage]

    [JCR Eigenfactor Score view screen] 

  • SJR (SCImago Journal Rank) is a journal impact index that weights based on the number of citations, reputation and citations of citations citing the journal, assuming all citations are not equal. Therefore, SJR is quoted in various journals, cited as highly reputed journals, and indexed more frequently, quoted by SCOPUS for 3 years. 

    The SNIP (Source Normalized Impact Per Paper) is a measure of per-paper impact, which measures the citation of individual journals based on the total number of citations in a subject area, and calculates how quickly they are cited. The impact per citation is given a higher value in subject areas with few citations, so you can use SNIP to compare themes. SNIP is based on SCOPUS citation information for 3 years.

  • The Korea Citation Index (KCI) provides various citations and statistical information on selected journals and candidate journals from the Korea Research Foundation’s journals. The various citation indexes provided by KCI are similar to the Journal Citation Reports, but the Korean citation index (Kor-Factor) is similar to the SCOPUS-based SJR. Unlike other citation indexes, which are usually based on citation information for a fixed period of two to three years, KCI can check the citation index if the user selects from two years to five years.
    It also provides researcher citation information based on data registered in KCI. You can check the total number of papers, the total number of citations, the average number of citations, and the H index.

    [Source: KCI Homepage]

  • The Korean Medical Citation Index (KoMCI) provides citation information and evaluation indexes based on the reference analysis of the articles in domestic medical journals selected by the Korean Journal of Medical Journal Editors’ Corresponds to JCR of.

    KoMCI is searchable from the 2000 edition on the web, and consists mainly of KoMCI Web and KoMCI Journal Web. KoMCI Web corresponds to Clarivate Analytics’s Web of Science and KoMCI Journal Web corresponds to Journal Citation Reports. 

    Since Web of Science and SCOPUS do not contain many domestic medical journals, refer to KoMCI for citation evaluation information on domestic medical journals.

    As of May 2017, we have registered 242 domestic medical journals.

    [Impact Factor view screen]

    [Output formula]
    The number of citations published in the previous two years of the KoMCI edition year divided by the number of citations in the KoMCI edition year 

    Confirming registered journals
    Journal evaluation criteria