Benjamin Bergen Frank Hülsemann Ulrich Rüde Is 1.7 x 10^10 Unknowns the Largest Finite Element System that Can Be Solved Today? 5 2005 conf/sc/2005 SC http://doi.acm.org/10.1145/1105760.1105770 db/conf/sc/sc2005.html#BergenHR05