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Revisa els mètodes seleccionats l'un al costat de l'altre; les files que difereixen es ressalten.
| Contemporary h-Index× | m-Quotient (Hirsch m)× | |
|---|---|---|
| Camp | Bibliometria | Bibliometria |
| Família | Process / pipeline | Process / pipeline |
| Any d'origen≠ | 2007 | 2005 |
| Autor original≠ | Antonis Sidiropoulos, Dimitrios Katsaros & Yannis Manolopoulos | Jorge E. Hirsch |
| Tipus≠ | Age-discounted author impact index | Career-length-normalized author impact rate |
| Font seminal≠ | Sidiropoulos, A., Katsaros, D., & Manolopoulos, Y. (2007). Generalized Hirsch h-index for disclosing latent facts in citation networks. Scientometrics, 72(2), 253-280. DOI ↗ | Hirsch, J. E. (2005). An index to quantify an individual's scientific research output. Proceedings of the National Academy of Sciences, 102(46), 16569-16572. DOI ↗ |
| Àlies | hc-index, time-weighted h-index, age-decayed h-index | Hirsch m-quotient, m-parameter, h-index per year |
| Relacionats | 3 | 3 |
| Resum≠ | The contemporary h-index, introduced by Sidiropoulos, Katsaros, and Manolopoulos in 2007, modifies Hirsch's h-index to reward recent scientific activity over old laurels. The plain h-index never decreases and treats a citation earned decades ago the same as one earned last year, so a researcher who has stopped publishing can coast on an aging body of work. The contemporary index assigns each paper an age-discounted score, multiplying its citation count by a factor that shrinks as the paper grows older, and then applies the usual h-index ranking criterion to these scores. The result distinguishes currently active, recently impactful researchers from those whose reputation rests on distant achievements. | The m-quotient, defined by Jorge Hirsch in the same 2005 paper that introduced the h-index, normalizes an author's h-index by the length of their scientific career. Because the h-index can only grow over time and never decreases, raw h-values systematically favor senior researchers and make it unfair to compare early-career scientists with established ones. The m-quotient divides the h-index by the number of years since the researcher's first publication, yielding a rate of impact accumulation per year. Hirsch proposed rough benchmarks on this scale, suggesting that a sustained value near 1 characterizes a successful scientist, near 2 an outstanding one, and near 3 a truly exceptional figure, making the m-quotient a tool for comparing researchers at different career stages. |
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