$h_{t}$ -index and $A_{t}$ -index for Evaluating Scientific Performance of Researchers

With fast increasing number of scientific publications, evaluation of the scientific performance of researchers has recently become an important issue. Nowadays, while the h-index and other Hirsh type indices take into consideration citation count of publications in the h-core, however, publication and citation count in the h-tail is omitted. This paper analyzes Hirsh type indices and proposes two new indices, the $h_{t}$ -index and the $A_{t}$ -index. The $h_{t}$ -index is defined as the h-index and the $A_{t}$ -index is defined as the A-index for the papers in the h-tail. These indices give information about the publications' quality in the h-tail. The proposed indices allow comparing researchers with the same h- and A-indices. For evaluation of the proposed indices experiment is conducted for 30 researchers in the fields of Data Mining. Results of the experiment demonstrated that if h-index and A-index of researchers are the same, then it is acceptable to compare them for their $h_{t}$ -index and $A_{t}$ -index.