The AD Scientific Index is published by Murat Alper and Cihan Doger of the University of Health Sciences, Ankara. It is a ranking system based on Google Scholar h-index scores.

There are various tables for countries, scientists, and universities, including research institutes, based on the h-index while additional indicator ranks are available for universities.

The leading university is Harvard and the leading country is the USA.  Among the interesting revelations in these rankings is the rapid improvement in Asian universities shown by a comparison of their total h-index rank with the rank over five years. The ranks for Tsinghua University, China, are 87^th in total and 33^rd   over five years, for King Abdullah University of Science and Technology 198^th and 116^th, for the Indian Institute of Technology Bombay, 849^th and 677^th, for the University of Tehran, Iran, 713^th and 387^th, and for the Korea Advanced Institute of Science and Technology 298^th and 227th.

The world’s top five scientists according to this measure (CERN excluded) are:

1. Robert Langer, Massachusetts Institute of Technology, USA, Engineering and Technology/Bioengineering
2. Eric Lander, Harvard University, USA, Natural Sciences/Mathematics,
3. Michael Graetzel, École Polytechnique Fédérale de Lausanne, Switzerland, Engineering and Technology/Energy Engineering
4. Bert Vogelstein, Johns Hopkins University, USA, Natural Sciences/Molecular Biology and Genetics
5. Gordon Guyatt, McMaster University, Canada. Medical and Health Sciences/Epidemiology and Public Health.

Source

AD Scientific Index 2023