"Sheng Wang,Dongming Sun,Junpei Sakurai,Kee-Bong Choi,Seiichi Hata,Akira Shimokohbe","Driving mechanism, design, fabrication process and experiments of a cylindrical ultrasonic linear microactuator",,"IEEE Trans. Ultrasonics, Ferroelectrics, and Frequency Control",,"Vol. 58","No. 1","pp. 168-177",2011,Jan.
"Dongming Sun,Sheng Wang,Junpei Sakurai,Kee-Bong Choi,Akira Shimokohbe,Seiichi Hata","A piezoelectric linear ultrasonic motor with the structure of circular cylindrical stator and slider",,"SMART MATERIALS AND STRUCTURES",,"Vol. 19",,"p. 045008 (9pp)",2010,Feb.
"Dongming Sun,Sheng Wang,Junpei Sakurai,Kee-Bong Choi,Seiichi Hata,Akira Shimokohbe","A traveling wave type of piezoelectric ultrasonic bidirectional linear microactuator",,"Applied Physics Express",,"Vol. 2",,"pp. 046503",2009,Feb.
"�iŽm’‰•F,’£ ‹Å—F,”Ñ“‡ ’m�O,›Á ‹N–P,—› êt�ì,‰º‰Íç³–¾","ƒ‰ƒWƒAƒ‹Ž¥‹CŽ²Žó‚Ì�‚�¸“x�§Œä",,"�¸–§�HŠw‰ïŽ�",,"Vol. 67","No. 11","pp. 1803-1807",2001,Nov.
"’£ ‹Å—F,�iŽm’‰•F,—› êt�ì,›Á ‹N–P,‰º‰Íç³–¾","�¸–§Ž¥‹CŽ²Žó‚ÌŒ¤‹†�i‘æ‚Q•ñ�j?‚QŽ©—R“x�§ŒäŒ^Ž¥‹CŽ²Žó‚̉ñ“]�¸“x?",,"2001”N“x�¸–§�HŠw‰ï�t‹G‘å‰ïŠw�p�u‰‰‰ï�u‰‰�W",,,,"pp. 541",2001,Mar.
"�`�½ˆê,�¼�è�«Œ’,›Á‹N–P,�²“¡ŠC“ñ,‰º‰Í•Ó–¾","ƒoƒ‹ƒN‹à‘®ƒKƒ‰ƒX‚ð—p‚¢‚½”÷�¬‹…–ÊŽ²Žó",,"“ú–{‹@ŠBŠw‰ïIIP2000 �î•ñ�E’m”\�E�¸–§‹@Ší•”–å�u‰‰‰ï�u‰‰˜_•¶�W",,,,"pp. 14-142",2000,
"T. Shinshi,C. Iijima,Z. Xiaoyou,K-B. Choi,K. Sato,A. Shimokohbe","Precision Radial Magnetic Bearing",,"ASPE 15th Annual Meeting",,"Vol. 22",,"pp. 240-243",2000,
"K-B. Choi,S.H. Kim,Y.K. Kwak","Tracking Performance Improvement of a Magnetic Levitation Based Fine Manipulator",,"J. of KSPE",,"Vol. 16","No. 5","pp. 58-65",1999,
"E-J. Shin,T-S. Song,J. Lyou,K-B. Choi","Decentralized Adaptive Control Scheme for Magnetically Levitated Fine Manipulators",,"J. of IEEE Korea Council",,"Vol. 3","No. 2","pp. 250-258",1999,
"I-M. Choi,K-B. Choi,S-H. Kim,Y.K. Kwak","A New Optical Disk Actuator Combining Coarse and Precise Fine Motion in a Single Actuation System",,"KSME(A)",,"Vol. 23","No. 3","pp. 400-408",1999,
"K-B. Choi,S.H. Kim,Y.K. Kwak","Robust Control for Micro Trajectory Motion of a Magnetically Levitated precise Platform",,"Proc. of the 17th IASTED Int. Conference",,,,"pp. 114-117",1998,
"K-H. Lee,K-B. Choi,K. Park,S.H. Kim,Y.K. Kwak","A Study on Three Degree-of-freedom Fine Positioning Device Based on Electromagnetic Force",,"J. of KSPE",,"Vol. 15","No. 11","pp. 199-207",1998,
"›Á‹N–P","A Fine Positioning Mechanism Based on Antagonistic Arrangement of 
Magnetic Levitation Forces",,,,,,,1998,
"D.S. Kim,K-B. Choi,S.H. Kim,Y.K. Kwak","A Study on Precision Drive Mechanism for Monochromator Grating",,"J. of KSPE",,"Vol. 14","No. 11","pp. 42-49",1997,
"K-B. Choi,S.H. Kim,Y.K. Kwak","A Fine Manipulator with Compliance for Wafer Probing System",,"J. of KSPE",,"Vol. 14","No. 9","pp. 68-79",1997,
"K. Park,K-B. Choi,S.H. Kim,Y.K. Kwak","Magnetic Levitated High Precision Positioning System Based on Antagonistic Mechanism",,"IEEE Tran. on Magnetics",,"Vol. 32","No. 1","pp. 208-219",1996,
"K-B. Choi,K. Park,S.H. Kim,Y.K. Kwak","Development of a Noncontacting 6 DOF Micro-Positioner Driven by Magnetic Force - Design, Modeling and Control -",,"Tran. of KSME(A)",,"Vol. 20","No. 4","pp. 1164-1176",1996,
"K-B. Choi,K. Park,S.H. Kim,Y.K. Kwak","Design of Magnetically Suspended Frictionless Manipulator",,"KSME Journal",,"Vol. 9","No. 3","pp. 323-335",1995,
"›Á‹N–P","A Study on the Development of 2-Axis Interpolator for Numerical 
Control and the Position Control",,,,,,,1988,