According to the latest Nature Index ranking system, which is based on internationally recognized journal articles published between December 2021 and November 2022, Shiraz University became the top university in the country.
Reported by the Public Relations of Shiraz University, quoting from the Department of Public Relations and International Scientific Cooperation of the Citation and Monitoring Institute of Science and Technology of the Islamic World (ISC), in the current edition of the Nature Index ranking, which covers the date of December 1, 2021, to November 30, 2022, Iran has been ranked 30th among the countries of the world.
In this ranking, 95 Iranian organizations are present, of which 78 are universities. Shiraz University ranked 921st among all the organizations and 754th world rank among universities, thus achieving the first rank in the country in both sections.
This ranking is based on four major subject areas of Physics, Chemistry, Earth and Environmental Sciences, and Biological Sciences. Iran's performance in these four subject areas is indicated in the table below based on the number and share of articles.
| Subject Areas | Global Ranking | Number of Articles | Share of the Article |
| Physics | 27 | 149 | 64.99 |
| Chemistry | 28 | 56 | 35.91 |
| Earth and Environmental Sciences | 38 | 18 | 6.24 |
| Biological Sciences | 51 | 34 | 5.29 |
The rank of other organizations in the country is also shown in the table below.
It bears mentioning that the Nature Index is an organizational dependency database composed of authors who have published articles in 82 leading natural science journals. The Nature Index provides absolute and relative counts of article publication at the organizational and national levels, thus providing an index of quality output and collaboration in research at a global level. The Nature Index is updated monthly and displays data for 12 months on its website.
The output of a paper for an institution, country, region, or city is calculated in two ways:
Number: If one or more authors of a research paper are from that institution or location, without regard to how many co-authors are from outside that institution or location, one point is awarded to the institution or location.
Share: A fractional count that takes into account the number of authors from an institution or country/region and the number of affiliated institutions in each article to calculate the share, the participation of all authors in the article is taken into account equally.
