Piezoelectric Floating Element Shear Stress Sensor for the Wind Tunnel Flow Measurement. - Kim, Taeyang; Saini, Aditya; Kim, Jinwook; Gopalarathnam, Ashok; Zhu, Yong; Palmieri, Frank L.; Wohl, Christopher J.; Jiang, Xiaoning (IEEE Trans. Ind. Electron., 2017)