S-index (h-mixed synthetic index)
The S-index (Ye 2010) is an h-mixed synthetic index which combines multiple metrics together into a single value. It is calculated as
$$S=100\log_{10}\left(h \times C/P\right),$$where C/P is the mean number of citations per publication.
History
| Year | S |
|---|---|
| 1997 | -47.7121 |
| 1998 | 77.8151 |
| 1999 | 116.6331 |
| 2000 | 148.2261 |
| 2001 | 169.3140 |
| 2002 | 197.2287 |
| 2003 | 218.6000 |
| 2004 | 242.2284 |
| 2005 | 260.6074 |
| 2006 | 277.8473 |
| 2007 | 294.0299 |
| 2008 | 306.2004 |
| 2009 | 316.5541 |
| 2010 | 321.5803 |
| 2011 | 331.4893 |
| 2012 | 343.3381 |
| 2013 | 346.7668 |
| 2014 | 351.9787 |
| 2015 | 356.0103 |
| 2016 | 359.0524 |
| 2017 | 364.3801 |
| 2018 | 364.7286 |
| 2019 | 367.2725 |
| 2020 | 370.8233 |
| 2021 | 373.7938 |
| 2022 | 376.0055 |
| 2023 | 378.2731 |
| 2024 | 379.9906 |
| 2025 | 382.1686 |
References
- Ye, F.Y. (2010) Two H-mixed synthetic indices for the assessment of research performance. Journal of Library and Information Studies 8:1–9.