1. Korea Research Institute of Ships and Ocean Engineering, 32 1312beon-gil Yuseong-daero, Yuseong-gu, Daejeon 34103, Korea
2. Marine Physical Laboratory, Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0238, USA
3. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, Georgia 30332-0405, USA