1. RIPE & 3D Printing, Hanbat National University, Daejeon, Republic of Korea
2. Department of Creative Convergence Engineering, Hanbat National University, Daejeon, Republic of Korea
3. Department of Electronics Engineering, Sookmyung Women's University, Seoul, Republic of Korea
4. Department of Smart Green Technology Engineering, Pukyong National University, Busan, Republic of Korea