Byoung-Goo Kim
Korea National Open University, Korea. 
E-mail: bgkim@knou.ac.kr

Dong-Ho Kim
SUNY Empire State College, USA. 

Wujin Chu

Seoul National University, Korea. 

Dongjin Shin

Paichai University, Korea.

Tae-Joong Kim

Chungnam National University, Korea.  

Yong-Ki Lee

Sejong University, Korea.  

Min-Soo Kang

Eulji University, Korea. 

Won Jae Seo

Eulji University, Korea. 

Young-Ah Rha

Eulji University, Korea.

Young-Eun Park

Prince Sultan University, Kingdom of Saudi Arabia 

Hoe-Chang Yang

Jangan University, Korea

Kang-Young Lee 

Chungbuk National University, Korea