Junichiro Makino Kei Hiraki Mary Inaba GRAPE-DR: 2-Pflops massively-parallel computer with 512-core, 512-Gflops processor chips for scientific computing. 18 2007 SC http://doi.acm.org/10.1145/1362622.1362647 conf/sc/2007 db/conf/sc/sc2007.html#MakinoHI07