Univ. of Auckland, Engineering Science, B.E. 2007.
Univ. of Auckland, Engineering Science, M.E. 2009.
KAIST, Civil & Environmental Engineering, Ph.D. 2013.
Na, Wongi S; History data free piezoelectric based non-destructive testing technique for debonding detection of composite structures. Composite Structures 226, 111225. Elsevier. 2019.
Na, Wongi S; Park, Ki-Tae; Toward Creating a Portable Impedance-Based Nondestructive Testing Method for Debonding Damage Detection of Composite Structures. Applied Sciences 9(15), 3189. MDPI. 2019.
Na, Wongi S; Baek, Jongdae; Piezoelectric Impedance-Based Non-Destructive Testing Method for Possible Identification of Composite Debonding Depth. Micromachines 10(9), 621. MDPI. 2019.
Tawie, Rudy; Park, Hee Beom; Baek, Jongdae; Na, Wongi S; Damage detection performance of the electromechanical impedance (emi) technique with various attachment methods on glass fibre composite plates. Sensors 19(5), 1000. MDPI. 2019.
Na, Wongi S; Low cost technique for detecting adhesive debonding damage of glass epoxy composite plate using an impedance based non-destructive testing method. Composite Structures 189, 99-106. Elsevier. 2018.
Na, Wongi S; Baek, Jongdae; A review of the piezoelectric electromechanical impedance based structural health monitoring technique for engineering structures. Sensors 18(5), 1307. MDPI. 2018.
Na, Wongi S; Seo, Dong-Woo; Kim, Byeong-Cheol; Park, Ki-Tae; Effects of applying different resonance amplitude on the performance of the impedance-based health monitoring technique subjected to damage. Sensors 18(7), 2267. MDPI. 2018
Na, Wongi S; Park, Ki-Tae; A cost-effective impedance-based structural health monitoring technique for steel structures by monitoring multiple areas. Journal of Intelligent Material Systems and Structures 28(2), 154-162. Sage Publications. 2017.
Na, Wongi S; Distinguishing crack damage from debonding damage of glass fiber reinforced polymer plate using a piezoelectric transducer based nondestructive testing method. Composite Structures 159, 517-527. Elsevier. 2017.
Na, Wongi S; Baek, Jongdae; Impedance-based non-destructive testing method combined with unmanned aerial vehicle for structural health monitoring of civil infrastructures. Applied Sciences 7(1), 15. MDPI. 2017.
Park, Eunil; Kim, Ki Joon; Kwon, Sang Jib; Han, Taeil; Na, Wongi S; Del Pobil, Angel P; Economic feasibility of renewable electricity generation systems for local government office: Evaluation of the Jeju special self-governing Province in South Korea. Sustainability 9(1), 82. MDPI. 2017.
Na, Wongi S; Possibility of detecting wall thickness loss using a PZT based structural health monitoring method for metal based pipeline facilities. NDT & E International 88, 42-50. Elsevier. 2017.
Na, Wongi S; Baek, Jongdae; Adhesive Defect Monitoring of Glass Fiber Epoxy Plate Using an Impedance-Based Non-Destructive Testing Method for Multiple Structures. Sensors 17(6), 1439. MDPI. 2017.
Na, Wongi S; Baek, Jongdae; Impedance Based Health Monitoring Technique with Probabilistic Neural Network for Possible Wall Thinning Detection of Metal Structures. Journal of Sensors 2017, Hindawi. 2017.
Na, Wongi S; Lee, Hyeonseok; Experimental investigation for an isolation technique on conducting the electromechanical impedance method in high-temperature pipeline facilities. Journal of Sound and Vibration 383, 210-220. Elsevier. 2016.
Na, Wongi S; Progressive damage detection using the reusable electromechanical impedance method for metal structures with a possibility of weight loss identification. Smart Materials and Structures 25(5), 55039. IOP Publishing. 2016.
Yang, BJ; Na, Sam; Jang, Jeong Gook; Kim, HK; Lee, Haeng-Ki; Thermo-mechanical analysis of road structures used in the on-line electric vehicle system. Structural Engineering and Mechanics 53(3), 519-536. Techno-press. 2015.
Ha, SK; Na, Sam; Bang, YK; Lee, Haeng-Ki; An experimental study on sag-resistance ability and applicability of sprayed FRP system on vertical and overhead concrete surfaces. Materials and Structures 48, 21-33. Springer. 2015.
Na, Sam; Lee, Haeng-Ki; Neural network approach for damaged area location prediction of a composite plate using electromechanical impedance technique. Composites Science and Technology 88, 62-68. Elsevier. 2013.
Na, Sam; Lee, Haeng-Ki; A multi-sensing electromechanical impedance method for non-destructive evaluation of metallic structures. Smart Materials and Structures 22(9), 95011 IOP Publishing. 2013.
Ha, Seong-Kug; Na, Sam; Lee, Haeng-Ki; Bond characteristics of sprayed FRP composites bonded to concrete substrate considering various concrete surface conditions. Composite Structures 100, 270-279. Elsevier. 2013.
Na, Sam; Lee, Haeng-Ki; Steel wire electromechanical impedance method using a piezoelectric material for composite structures with complex surfaces. Composite Structures 98, 79-84. Elsevier. 2013.
Na, Sam; Tawie, Rudy; Lee, Haeng-Ki; Electromechanical impedance method of fiber-reinforced plastic adhesive joints in corrosive environment using a reusable piezoelectric device. Journal of Intelligent Material Systems and Structures 23(7), 737-747. Sage Publications. 2012.
Na, Sam; Lee, Haeng-Ki; A technique for improving the damage detection ability of the electro-mechanical impedance method on concrete structures. Smart Materials and Structures 21(8), 85024. IOP Publishing 2012.
Na, Sam; Lee, Haeng-Ki; Resonant frequency range utilized electro-mechanical impedance method for damage detection performance enhancement on composite structures. Composite Structures 94(8), 2383-2389. Elsevier. 2012.
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