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 | 4.0000 |
| 1999 | 4.8889 |
| 2000 | 5.3125 |
| 2001 | 5.9200 |
| 2002 | 7.1667 |
| 2003 | 8.1429 |
| 2004 | 9.9844 |
| 2005 | 11.6296 |
| 2006 | 13.5100 |
| 2007 | 14.7851 |
| 2008 | 15.6389 |
| 2009 | 16.2426 |
| 2010 | 17.1071 |
| 2011 | 18.0267 |
| 2012 | 18.5430 |
| 2013 | 19.0830 |
| 2014 | 19.2284 |
| 2015 | 19.2576 |
| 2016 | 19.1975 |
| 2017 | 18.8912 |
| 2018 | 18.5909 |
| 2019 | 18.2760 |
| 2020 | 17.9688 |
| 2021 | 17.7264 |
| 2022 | 17.4423 |
| 2023 | 17.0412 |
| 2024 | 16.6671 |
| 2025 | 15.9524 |
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.