← Back to introduction

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

Yearar
19971.0000
19982.8284
19993.6286
20004.4347
20015.5408
20027.4677
20038.9675
200410.9680
200512.7129
200614.3248
200715.5255
200816.7775
200917.8566
201018.4934
201123.6398
201223.7216
201324.0850
201424.3352
201524.6657
201624.7126
201724.7891
201824.7529
201924.7066
202024.9217
202125.0222
202225.1362
202325.0264
202425.0509
202525.8335

References