Introduction
The h index is a metric for evaluating the cumulative impact of an author’s scholarly output and performance.
The h-index may be a number intended to represent both the productivity and therefore the impact of a specific scientist or scholar, or a gaggle of scientists or scholars (such as a departmental or research group). In short, It is defined as the highest number of publications of a scientist that received h or more citations each.
Calculation
The h-index is calculated by counting the number of publications that an author has been cited by other authors a minimum of that very same number of times. For instance, an h-index of 17 means that the scientist has published at least 17 papers that have each been cited at least 17 times.