1. Sejong University, Seoul, South Korea
2. CORIS Institute, Oregon State University, Corvallis, OR, USA
3. Color and Visual Computing Lab, Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway
4. Visual Analytics for Knowledge Laboratory (VIS2KNOW Lab), School of Convergence, College of Computing and Informatics, Sungkyunkwan University, Seoul, South Korea