1. Major, Republic of Korea Marine Corps, P.O. Box #601-206-12, Bongdam, Hwasung, South Korea, 445-899.
2. Professor Emeritus and Director, Recycled Material Resource Center, Univ. of Wisconsin-Madison, 2228 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706 (corresponding author).
3. Wisconsin Distinguished Professor and Director, Office of Sustainability Research and Education, Univ. of Wisconsin, Madison, WI 53706.
4. Assistant Professor, Dept. of Engineering Professional Development, Univ. of Wisconsin, Madison, WI 53706.