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| Hirsch index ： ウィキペディア英語版 |
H-index
The ''h''-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications. The index can also be applied to the productivity and impact of a scholarly journal〔(【引用サイトリンク】title=Google Scholar Metrics for Publications - Google Scholar Blog )〕 as well as a group of scientists, such as a department or university or country. The index was suggested in 2005 by Jorge E. Hirsch, a physicist at UCSD, as a tool for determining theoretical physicists' relative quality and is sometimes called the ''Hirsch index'' or ''Hirsch number''.
== Definition and purpose ==
The definition of the index is that a scholar with an index of ''h'' has published ''h'' papers each of which has been cited in other papers at least ''h'' times. Thus, the ''h''-index reflects both the number of publications and the number of citations per publication. The index is designed to improve upon simpler measures such as the total number of citations or publications. The index works properly only for comparing scientists working in the same field; citation conventions differ widely among different fields.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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