1. School of Architectural, Civil, Environmental and Energy Engineering, Kyungpook National University, 80 Daehak-Ro, Buk-Gu, Daegu 702-701, Republic of Korea
2. Research Institute of Advanced Energy Technology, Kyungpook National University, 80 Daehak-Ro, Buk-Gu, Daegu 702-701, Republic of Korea