The new rankings by both Shanghai and SciMago for universities is now available. The former ranks the top 500 universities while the latter ranks 3290 institutions.
In the Shanghai overall rankings, only IISc figures in the list from India. After dropping from the list of 201-300 in 2004, it has maintained its rank in the bracket of 301-400 till now. Couple of other IITs used to find a place in the Shanghai overall rankings but now no longer figure in the top 500. In the subject category, IISc maintains its top 50 rank in chemistry and top 100 rank in engineering.
All IITs and some other Indian institutions figure in the SciMago rankings. In these rankings also, IISc is the top Indian institution with a rank of 376. IIT-KGP with a rank of 460 follows. These are the only Indian institutions in the top 500.
For the rankings, both Shanghai and SciMago use the quality of publication output i.e., it calculates the ratio of publications that an institution publishes in the most influential scholarly journals of the world; those ranked in the top 20% (Shanghai) or top 25% (SciMago) in their categories. While India publishes around 10% of the papers in the top 25% journals, IISc publishes 54.2% of the total number of papers (8,573 in a five year period of 2006-2010) in the top 25% journals.
Update: Fudging data to climb up the rankings (Through Abi's blog)