1. Researcher, Dept. of Mechanical Engineering, Andong Univ., 1375, Gyeongdong (SongCheon-dong), Andong, Gyeongsangbuk-do 36729, South Korea-100038.
2. Research Professor, Dept. of Mechanical Engineering, Andong Univ., 1375, Gyeongdong (SongCheon-dong), Andong, Gyeongsangbuk-do 36729, South Korea-100038.
3. Full Professor, Dept. of Mechanical Engineering, Andong Univ., 1375, Gyeongdong (SongCheon-dong), Andong, Gyeongsangbuk-do 36729, South Korea-100038 (corresponding author).