affiliation not provided to SSRN, University of Alabama in Huntsville, University of Alabama in Huntsville, affiliation not provided to SSRN, affiliation not provided to SSRN, NASA Marshall Space Flight Center, affiliation not provided to SSRN, IBM Research Europe, IBM Research, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, IBM Research, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Alabama in Huntsville, University of Alabama in Huntsville, University of Alabama in Huntsville, Clark University, Clark University, Clark University, Clark University, affiliation not provided to SSRN, NASA Marshall Space Flight Center, affiliation not provided to SSRN and NASA Marshall Space Flight Center