My primary interest is in performance and portability issues on high-performance emerging architectures for scientific computing and big data analytics. I have successfully obtained funds to support my research from NSF, DTIC, DoD, Fermilab, Jefferson Laboratory, NASA, Los Alamos, AFRL, NRL, JTASC, Sun Microsystems, Intel, and IBM. I have supervised twelve Ph.D. theses, over thirty-five MS projects/theses, and published over two-hundred papers in refereed conference proceedings and journals.