Los Alamos Monitor: The National Nuclear Security Administration and IBM issued separate announcements Wednesday about their $35 million first-phase project to build a new supercomputer that will attempt a sustained speed of up to a quadrillion calculations per second, otherwise known as a petaflop.The high-performance computer to be built for Los Alamos National Laboratory will be known as the Roadrunner. It will be assembled entirely from off-the-shelf hardware and will run on a sophisticated version of open-source Linux software.