How to calculate the impact factor and h-index презентация

The Hirsch index
The h-index, or the Hirsch index, is the science-metric indicator proposed in 2005 by the Argentine-American physicist Jorge Hirsch of the University of California at San Diego, initially to assess the scientific productivity of physicists. The Hirsch index is a quantitative characteristic of the productivity of a scientist, a group of scientists, a scientific organization, or the country as a whole, based on the number of publications and the number of citations of these publications

How the index is calculated
The index is calculated on the basis of the distribution of citations of the researcher's work. According to Hirsch:
The scientist has an index h if h from his Np articles are cited at least h times each, while the remaining (Np-h) articles are cited no more than h times each.
In other words, the scientist with the index h published h articles, each of which was referred to at least h times. So, if this researcher published 100 articles, for each of which there is only one reference, his h-index is 1. The same is the h-index of the researcher who published one article, which was referenced 100 times

At the same time (more realistic case), if among the publications of the researcher there is 1 article with 9 citations, 2 articles (including the already mentioned article with 9 citations) with not less than 8 citations, 3 articles with not less than 7 citations, ..., 9 articles with not less than 1 citation of each of them, then its h-index is equal to 5 (since 5 articles were referred to at least 5 times).

Criticism
The Hirsch index, of course, is not ideal. A number of his shortcomings were noted in Hirsch's original paper [1]. It is not difficult to think of a situation where the h-index gives a completely incorrect estimate of the significance of the researcher. In particular, the short career of the scientist leads to an underestimation of the significance of his work. Thus, the h-index of the deceased in his youth and having managed to publish only four articles of Evariste Galois is 4 and will remain so forever.

The Hirsch index is a quantitative characteristic of the scientist's productivity for the entire period of scientific activity; It is presented in the abstract databases Scopus and Web of Science. The h-Index can also be calculated using free public databases on the Internet - for example, using Google Scholar

H-The index is often criticized, because Sometimes it gives a completely incorrect estimate of the significance of the researcher. In particular, the short career of the scientist leads to an underestimation of his work. The value of the indicator essentially depends on the field of science and the age of the researcher. In biology and medicine, the h-index is much higher than in physics or chemistry.