1. Dept. of Geological Engineering, Missouri Univ. of Science and Technology, 129 McNutt Hall, 1400 N. Bishop Ave., Rolla, MO 65409 (corresponding author).
2. Dept. of Geological Engineering, Missouri Univ. of Science and Technology, 129 McNutt Hall, 1400 N. Bishop Ave., Rolla, MO 65409.
3. Dept. of Computer and Electrical Engineering, Missouri Univ. of Science and Technology, 305 McNutt Hall, 1400 N. Bishop Ave., Rolla, MO 65409.