citation acceleration
Citation acceleration (Sangwal 2012) is defined as the total number of citations of an author divided by the square of their academic age,
$$a = \frac{C^P}{\left(Y-Y_0+1\right)^2}=\frac{\sum\limits_{i=1}^{P}{C_i}}{\left(Y-Y_0+1\right)^2}.$$History
| Year | a |
|---|---|
| 1997 | 2.0000 |
| 1998 | 3.7500 |
| 1999 | 4.8889 |
| 2000 | 5.2500 |
| 2001 | 5.8000 |
| 2002 | 7.1111 |
| 2003 | 8.1429 |
| 2004 | 10.0156 |
| 2005 | 11.6790 |
| 2006 | 13.5900 |
| 2007 | 14.8430 |
| 2008 | 15.6806 |
| 2009 | 16.2899 |
| 2010 | 17.1224 |
| 2011 | 18.0622 |
| 2012 | 18.6133 |
| 2013 | 19.1315 |
| 2014 | 19.2469 |
| 2015 | 19.2742 |
| 2016 | 19.2225 |
| 2017 | 18.9184 |
| 2018 | 18.6260 |
| 2019 | 18.3006 |
| 2020 | 17.9774 |
| 2021 | 17.7568 |
| 2022 | 17.4822 |
| 2023 | 17.0754 |
| 2024 | 16.7258 |
| 2025 | 15.7788 |
References
- Sangwal, K. (2012) On the relationship between citations of publication output and Hirsch index h of authors: Conceptualization of tapered Hirsch index hT, circular citation area radius R and ciation acceleration a. Scientometrics 93:987–1004.