JOONHYOUK JANG1, JINMAN JUNG1, YOOKUN CHO1, SANGHOON CHOI2 AND SUNG Y. SHIN3
1School of Computer Science and Engineering
Seoul National University
Seoul, 151-744 Korea
2School of Computing
Soongsil University
Seoul, 156-743 Korea
3Electric Engineering and Computer Science Department
South Dakota State University
Brookings, SD57007 USA