TABLE 2.
Top 10 most productive countries in terms of relevant articles.
| Country | Ps | Percentage (%) | TCa | TC/Pb | H-index |
|---|---|---|---|---|---|
| United States | 602 | 17.17 | 33,188 | 55.13 | 91 |
| China | 538 | 15.34 | 15,962 | 29.67 | 58 |
| India | 432 | 12.32 | 16,896 | 39.11 | 65 |
| Germany | 213 | 6.07 | 10,749 | 50.46 | 49 |
| Iran | 188 | 5.36 | 6,752 | 35.91 | 43 |
| Italy | 186 | 5.30 | 5,811 | 31.24 | 42 |
| France | 172 | 4.90 | 11,161 | 64.89 | 49 |
| Spain | 170 | 4.85 | 8,100 | 47.65 | 43 |
| Brazil | 158 | 4.51 | 4,496 | 28.46 | 30 |
| England | 145 | 4.13 | 7,500 | 51.72 | 42 |
Note: Ps: the total number of articles published. TCa: the total citations for a country. TC/Pb: average number of citations per paper for a country. h-index: according to Hirsch (2005): A scientist has index H if H of his/her Np articles have at least H citations each, and the other Np-H, articles have no more than H citations each, in which Np is the number of articles published during n years. A higher-index indicates greater academic impact.