This research was supported in part by the National Science Foundation through TeraGrid resources provided by Pittsburgh Supercomputing Center under TG-DBS110003; the National Science Foundation under IIS-0713402, IIS-0844507, IIS-0915187, and IIS-0915327; the DARPA GALE program, the U. S. Army Research Laboratory, and the U. S. Army Research Office under contract/grant number W911NF-10-1-0533.
we have also shown that it is possible to control for it with very few replications (Table 2).