A New Version of the Hirsh Index: The j-Index

摘要

The history of creating unbiased criteria of assess- ing scientific activity will always remember the name of the American physicist Jorge E. Hirsch, who, in his original article [1] in 2005, introduced a citation index of an individual researcher, which was named after him the h-index (the Hirsch index, or simply the Hir- sch). As the creator of this term himself puts it, "A sci- entist has index h if h of his/her Np papers have at least h citations each, and the other (Np – h) papers have no more than h citations each" [1, p. 16569]. Later, Hir- sch proposed a more complicated definition of the above-mentioned scientometric parameter: "A scien- tist has index h if h of his/her papers belong to his/her h-core. A paper belongs to the h-core of a scientist if it has ≥h citations. The h-core set is not necessarily unique because there may be more than one paper with citation count = h'' [2, p. 742].