Session Organizer and Chair, World Forum on Smart Materials and Smart Structures Technology, Electroactive Sensors and Actuators, Chongqing, China, 2007. 5. 22-27

Program Committee, Active and Passive Smart Structures and Integrated Systems (Conference 6525),
The 14th SPIE's 2007 International Symposium on Smart Structures and Materials, San Diego, California, U.S.A., 2007.3.18-22.

International Organization Committee,
The International Symposium on Smart Materials for Engineering & Biomedical
Application (SMEBA) 2006, KAIST, Daejon, Korea, 2006.9.21-23

Session Chairman, Session FB1,
The International Symposium on Smart Materials for Engineering & Biomedical
Application (SMEBA) 2006, KAIST, Daejon, Korea, 2006.9.21-23

International Scientific Committee,
The 10th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Lake Tahoe, Nevada, USA, 2006.6.18-6.22.

Session Chairman, Session 4 of Conference 6173(Energy Harvest and haptic Devices),
The 13th SPIE's 2006 International Symposium on Smart Structures and Materials, San Diego, California, U.S.A., 2006.2 26.-3.2.

Program Committee, Smart Structures and Integrated Systems (Conference 6173),
The 13th SPIE's 2006 International Symposium on Smart Structures and Materials,
San Diego, California, U.S.A., 2006.2 26.-3.2.

Program Committee, Smart Structures and Integrated Systems(Conference 5764),
The 12th SPIE's 2005 International Symposium on Smart Structures and Materials, San Diego, California, U.S.A., 2005.3.6-3.10.

International Scientific Committee,
The 9th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Beijing, China, August 29 -September 3, 2004.

Program Committee,
Smart Structures and Integrated Systems(Conference 5390), The 11th SPIE's 2004 International Symposium on Smart Structures and Materials, San Diego, California, U.S.A., 2004.3.14-3.18.

International Organization Committee,
The 14th International Conference on Adaptive Structures and Technologies,
Seoul National University, Seoul, Korea, October 7-9, 2003.

Program Committee, Smart Structures and Integrated Systems(Conference 5056),
The 10th SPIE's 2003 International Symposium on Smart Structures and Materials, San Diego, California, U.S.A., 2003.3.2-3.6.

Session Chairman, Session 01(ER/MR Fluids and Devices),
The 9th SPIE's 2002 International Symposium on Smart Structures and Materials,
San Diego, California, U.S.A., 2002.3.17-3.21.

Program Committee,
Smart Structures and Integrated Systems(Conference 4701), The 9th SPIE's 2002 International Symposium on Smart Structures and Materials, San Diego, California,
U.S.A., 2002.3.17-3.21.

Session Chairman, Session D-IV(Physical Mechanisms),
The 8th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Nice,
France, July 19-13, 2001.

International Scientific Committee,
The 8th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Nice, France, July 19-13, 2001.

Session Chairman, Session 11(Piezoactuators 1),
The 8th SPIE's 2001 International Symposium on Smart Structures and Materials,
Newport Beach, California, U.S.A., 2001.3.4-3.8.

Program Committee, Smart Structures and Integrated Systems(ss02),
The 8th SPIE's 2001 International Symposium on Smart Structures and Materials,
Newport Beach, California, U.S.A., 2001.3.5-3.8.

Session Chairman, Division of Smart Structures and Devices, Session 9;
Optoelectronics and MOEMS, SPIE's 2000 Symposium on Smart Materials and MEMS, Melbourne, Australia, 13-15 December, 2000.

Program Committee, Division of Smart Structures and Devices,
SPIE's 2000 Symposium on Smart Materials and MEMS, Melbourne, Australia, 13-15 December, 2000.

Session Chairman, Session of Vibration,
The 2nd Asian-Australian Conference on Composite Materials,
Kyongju, Korea, 18-20 August, 2000.

Scientific Committee,
The Third Korea-Japan Symposium on Frontiers in Vibration Science and Technology, Yonsei University, Seoul, June 15-16, 2000.

Session Chairman,
Session 8(Neural, Fuzzy, and Genetic Algorithm) and Session 9(Actuators),
The 7th SPIE's 2000 International Symposium on Smart Structures and Materials,
Newport Beach, California, U.S.A., 2000.3.5-3.9.

Session Chairman, Session D-II(Materials and Properties),
The 7th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Honolulu, Hawaii, U.S.A., July 19-23, 1999.

International Advisory Committee,
The 7th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Honolulu, Hawaii, U.S.A., July 19-23, 1999.

Organizing Committee,
'The First Korea-Japan Symposium on Frontiers in Vibration Science and Technology, KAIST, Taejon, Korea, '98.9.24-9.25.

Session Chairman,
Session 14(Vibrations and Noise Control),
SPIE's 1998 Symposium on Smart Structures and Materials, San Diego, California,
U.S.A., '98.3.1-3.5.

Program Committee, '97 Asia-Pacific Vibration Conference, Kyongju, Korea, '97.11.9-13.

Session Chairman, Session 15(Active Devices),
SPIE's 1997 Symposium on Smart Structures and Materials, San Diego,
California, U.S.A, '97.3.3-3.6.

Session Chairman, Session X,
The 6th Int. Conference on ER Fluids, MR Suspensions, and Their Applications,
Yonezawa, Japan, '97.7.22-7.25.

International Advisory Committee,
The 6th International Conference on Electrorheological Fluids, Magnetorheological Suspensions, and Their Applications, Yonezawa, Japan, '97.7.22-7.25.

Session Chairman,
Session 2B, International Symposium on Vehicle NVH, Seoul, Korea, '96.6.17-6.19.

Session Chairman, Session 3A, '95 Asia-Pacific Vibration Conference,
Kuala Lumpur, Malaysia, '95.11.27-12.1.

Session Chairman,
The 5th International Conference on Electro-Rheological Fluids,
Magneto-Rheological Suspensions and Associated Technology, Sheffield, England, ‘95.7.10-7.15.

Session Chairman,  Session FS0, 
‘94 International Conference on Vibration Engineering, Beijing, China, ‘94.6.14-6.18.