ar-index
The ar-index (Jin 2007; Jin et al. 2007) is an adaptation of the R-index which includes time. Rather than being the square-root of the total citations within the core, it is the square-root of the citations per year within the core,
$$ar=\sqrt{\sum\limits_{i=1}^{h}{\frac{C_i}{Y-Y_i+1}}},$$where Y is the current year.
History
| Year | ar |
|---|---|
| 1997 | 1.0000 |
| 1998 | 2.4495 |
| 1999 | 3.6056 |
| 2000 | 4.3397 |
| 2001 | 5.6613 |
| 2002 | 7.8464 |
| 2003 | 9.4862 |
| 2004 | 11.2810 |
| 2005 | 12.9811 |
| 2006 | 14.6432 |
| 2007 | 15.8193 |
| 2008 | 17.0151 |
| 2009 | 18.2689 |
| 2010 | 18.8154 |
| 2011 | 23.9522 |
| 2012 | 23.9823 |
| 2013 | 24.3068 |
| 2014 | 24.5436 |
| 2015 | 24.8524 |
| 2016 | 24.9007 |
| 2017 | 24.9570 |
| 2018 | 24.9210 |
| 2019 | 24.8575 |
| 2020 | 25.0430 |
| 2021 | 25.1855 |
| 2022 | 25.2328 |
| 2023 | 25.2321 |
| 2024 | 24.6135 |
References
- Jin, B. (2007) The ar-index: Complementing the h-index. ISSI Newsletter 3(1):6.
- Jin, B., L. Liang, R. Rousseau, and L. Egghe (2007) The R- and AR-indices: Complementing the h-index. Chinese Science Bulletin 52(6):855–863.