"J Index" is an academic evaluation index, which is used to evaluate the achievements of scholars in the field of scientific research. This index is mainly used to measure the quantity and quality of papers published by academic scholars, and consider the frequency of these papers being cited.
First, the calculation method
Jordan index was put forward by American statistician Edward J. Hirsch, and its calculation method is based on the number of papers published by the author and the cited frequency of these papers.
A scholar's J index is equal to the number n of papers published in the academic field and the square root of the cited frequency of these papers, that is, J = √(n).
The significance of this indicator is that if a scholar's J index is J, it means that at least J papers have been cited more than J times in all his published papers.
Second, the significance and application
Jordan index can be used to evaluate the academic influence and research contribution of scholars. It not only considers the number of papers, but also considers the citation of these papers. A scholar with a high J index means that his published papers have had a wide influence in academic circles and are frequently cited by other scholars, thus reflecting his academic contribution and influence.
Three. Limitations and controversies
Although Jordan index is an index to measure academic influence, it also has certain limitations and controversies. For example, the index is biased towards older scholars, because the older they are, the more times they are cited, which will lead to some young and emerging researchers being underestimated. At the same time, the applicability to different disciplines is also controversial, because different disciplines may cite and publish in different ways.
Generally speaking, Jordan index is an index to measure the academic influence of scholars, which can provide scholars with a way to measure their own research results. However, as one of the indicators for evaluating academic influence, scholars' academic contributions should be comprehensively evaluated together with other indicators.