1. Dept. of City and Regional Planning, Univ. of California, 2299 Piedmont Ave., Berkeley, CA 94720.
2. Assistant Professor, Dept. of Urban Design and Planning, Hongik Univ., K520, 94 Wausan-ro, Mapo-gu, Seoul 121-791, Republic of Korea (corresponding author).
3. Associate Professor, Dept. of Architecture, Chung-Ang Univ., Heuksukdong-ro 84, Dongjak-gu, Seoul 156-756, Republic of Korea.