Publications
Komorgotsev, O. V., Ryu, Y. S., Koh, D. H., and Gowda, S. M. (2009). Instantaneous Saccade Driven Eye Gaze Interaction. In Proceedings of International Conference on Advances in Computer Entertainment Technology 2009. Athens, Greece.

Pan, Y. H. and Ryu, Y. S. (2009). Insights for TV Interface from Mobile Interface. Journal of Usability Studies. 4(4), 166-177.

Komorgotsev O. V., Ryu, Y. S. and Koh, D. H. (2009). Quick Models for Saccade Amplitude Prediction. Journal of Eye Movement Research, 3(1):1, 1-13.

Ryu, Y. S. (2009). Mobile Phone Usability Questionnaire and Automated Usability Evaluation. In Proceedings of Human Computer Interaction International 2009, San Diego.

Ryu, Y. S., Suh, T., and Dozier, S. (2009). Effects of Design Elements in Magazine Advertisements. In Proceedings of Human Computer Interaction International 2009, San Diego.

Kim, S. Cranor, B. and Ryu, Y. S. (2009). FATIGUE; Working under the Influence. In Proceedings of XXIst Annual International Occupational Ergonomics and Safety Conference 2009, Dallas.

Ryu, Y. S., Suh, T., and Kim, H. S. (2008). Revising the Mobile Phone Usability Questionnaire (MPUQ): An Item Response Theory Approach, In proceedings of Society of Marketing Advances 2008, Ft. Lauderdale.

Ryu, Y. S., Babski-Reeves, K., Smith-Jackson, T. L., and Nussbaum, M. A. (2007). Decision Models for Comparative Usability Evaluation of Mobile Phones Using MPUQ. Journal of Usability Studies. 3(1), 24-40.

Ryu, Y. S., Yi, H. C., Dozier, S., and Mattey, P.(2007). User Preferences of Numeric Entry Methods for Interactive Voice Response System (IVRS), In proceedings of the 10th IFAC/IFIP/IFORS/IEA Symposium on Analysis, Design, and Evaluation of Human-Machine Systems, Seoul, Korea.

Ryu, Y. S., Babski-Reeves, K., Smith-Jackson, T. L., and Nussbaum, M. A. (2007). Enhancing the Mobile Phone Usability Questionnaire (MPUQ) with a Multi-criteria Decision Making Method, In proceedings of HCI International 2007, Beijing, China.

Ryu, Y. S., Nam, C. S., and Smith-Jackson, T. L. (2007). Web-based Instruction for High School Students: Exploration of Individual and Cultural Learning Styles. In proceedings of The Sixth IASTED International Conference on Web-based Education, Chamonix, France.

Ryu, Y. S. and Smith-Jackson, T. L. (2006). Reliability and Validity of Mobile Phone Usability Questionnaire (MPUQ). Journal of Usability Studies. 2(1), 39-53.

Ryu, Y. S., Lee, Y. S., Smith-Jackson, T. L, Nussbaum, M. A., and Tomioka, K. (2006). User-centered Design and Testing Methods for the Development of the Navigation Menu System for Mobile Phones. In Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting, San Francisco.

Ryu, Y. S. and Smith-Jackson, T. L. (2005). Usability Questionnaire Items for Mobile Products and Content Validity. In Proceedings of HCI International 2005, Las Vegas.

Ryu, Y. S., Smith-Jackson, T. L., and Williges, R. C. (2005) Rapid Prototyping Methods to Develop Applications for Seniors. In Proceedings of HCI International 2005, Las Vegas.

Lee, Y. S., Ryu, Y. S., Shin, D. J., Smith-Jackson, T. L, Nussbaum, M. A., and Tomioka, K. (2005). Usability testing with cultural groups in developing a cell phone navigation system. In Proceedings of HCI International 2005, Las Vegas.

Ryu, Y.S., Yost, B., Convertino, G., Chen, J., and North, C. (2003). Exploring Cognitive Strategies for Integrating Multiple-View Visualizations. In Proceedings of the Human Factors and Ergonomics Society 47th Annual Meeting, Denver. (Won Best Student Paper Award by CEDM Technical Group of HFES 2003)

Ryu, Y.S., Williges, R. C., Smith-Jackson, T. L., and Kwahk, J. (2002). Comparison of design requirements methods for monitoring eating patterns of seniors in a Smart House. In Proceedings of the Human Factors and Ergonomics Society 46th Annual Meeting, Baltimore.

Convertino, G. Chen, J., Yost, B., Ryu, Y.S., and North, C. (2003). Exploring Context Switching and Cognition in Dual-View Coordinated Visualizations. In Proceedings of the International Conference on Coordinated & Multiple Views in Exploratory Visualization, London, UK.

Bowman, D. A., Datey A., Ryu, Y. S., Farooq U., and Vasnaik, O. (2002). Empirical comparison of human behavior and performance with different display devices for virtual environments. In Proceedings of the Human Factors and Ergonomics Society 46th Annual Meeting, Baltimore.

Williges, R. C., Smith-Jackson, T. L., Kwahk, J., Ryu, Y. S., and Narayan, S. (2002). Adaptive Telemedical Support Systems Used with Smart House Technology, Technical Report ACE/HCIL-02-01.

Smith-Jackson, T., Williges, R. C., Kwahk, J., Capra, M., Durak, T., Nam, C. S. , and Ryu, Y. S. (2001). User requirements specification for a prototype healthcare information website and an online assessment tool", Technical Report ACE/HCIL-01-01, prepared for Carilion Biomedical Institute at Roanoke Virginia and Medical Automation Research Center at University of Virginia, June 2001

Bowman, D. A., Datey A., Farooq, U., Ryu, Y. S., and Vasnaik, O. (2001). Empirical comparisons of virtual environment diaplays", Technical Report TR-01-09, Department of Computer Science, Virginia Tech, 2001