1. Ph.D. Candidate, Bradley Dept. of Electrical and Computer Engineering, Virginia Tech, 302 Whittemore Hall, Blacksburg, VA 24060.
2. National Center for Supercomputing Applications (NCSA) Faculty Fellow and Assistant Professor, Dept. of Civil and Environmental Engineering and Dept. of Computer Science, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801 (corresponding author).
3. Assistant Professor, Dept. of Electrical Engineering and Computer Science, Vanderbilt Univ., 2301 Vanderbilt Place, Nashville, TN 37235.