Michael S. Rosenberg’s Laboratory

Computational Evolutionary Biology & Bioinformatics

E-mail: msr@asu.edu
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dynamic discounted cumulated impact (sharp decay)

The dynamic discounted cumulated impact index (Järvelin and Pearson 2008; Ahlfren and Järvelin 2010) is an addendum to the discounted cumulated impact index which cumulates across different time intervals, rather than a single fixed interval. Formally, it is a vector defined as:

$$\text{dDCI}_Y\left[j\right]=DCI_j\left[j\right] ,$$

where DCIj[j] is essentially the last item in the DCI vector for time interval j. When calculated for a career, where each subsequent interval is the length of the career up to that point, the values calculated for earlier career points are identical those same intervals for later career points, thus we just report the final value for each year, with all values up to that year actually representing the full dDCI vector.

Because DCI can be calculated with varying degrees of citation decay, dDCI is also dependent on this same decay. This version is calculated from the DCI index with a sharp decay of b = 2.

History

YeardDCI (b = 2)
19972.0000
199813.0000
199936.0000
200066.2619
2001127.9402
2002224.8727
2003336.5700
2004524.0147
2005732.3430
2006995.5355
20071219.4386
20081459.1191
20091702.4104
20101971.2244
20112169.5037
20122292.6365
20132440.7251
20142587.9170
20152726.1362
20162835.1046
20172831.3121

References