The University of Washington remained No. 15 on the 2015 Academic Ranking of World Universities, conducted by researchers at the Center for World-Class Universities of Shanghai Jiao Tong University, which was released Monday. The UW again ranked 13th among U.S. universities and fourth among public institutions worldwide. The ranking considers several indicators of academic or research performance, including alumni and staff winning Nobel Prizes and Fields Medals, highly cited researchers, papers published in the journals Nature and Science, papers indexed in…