Dr. Byounghyun Yoo is a senior research scientist of the Imaging Media Research Center (IMRC) at the Korea Institute of Science and Technology (KIST). Before he joined the KIST, he was a research scientist of the Center for Environmental Sensing and Modeling (CENSAM) at the Singapore-MIT Alliance for Research and Technology (SMART) Centre and a visiting research scientist of the Center for Educational Computing Initiative (CECI) at MIT. He had been a research fellow in the Modeling, Virtual Environments, and Simulation (MOVES) Institute at the Naval Postgraduate School in Monterey California. He served as the first Web3D fellow of the Web3D Consortium, the nonprofit organization that develops and maintains the international standard for 3D graphics on the Web. In this role he worked with the X3D Earth Working Group on scientific and engineering challenges that are particularly important for advancing the X3D standard into open geospatial computing platforms. Previously, he was the chief research director of the virtual reality group at PartDB Co., Ltd., a KAIST spinoff founded in 1999 and a research fellow of the Intelligent Computer Aided Design (iCAD) laboratory at the Korea Advanced Institute of Science and Technology (KAIST). The principal focus of his research has been the fusion of geospatial information and virtual reality technology. He developed a geometric modeling kernel for a 3D CAD system and image-based techniques for modeling large-scale urban environments from aerial photographs and digital maps. He has also contributed to the development of various virtual reality simulators including bicycle VR simulators, a sports helicopter simulator and multi-sensory VR effects systems, and the construction of large-scale virtual environments for these simulators. His research interests include modeling and visualization large-scale virtual environment, convergence of virtual reality and geographic information system, image-based modeling and rendering, multi-sensory VR system, physics based virtual reality, and Web3D techniques. He is also the inventor of 9 patents in computer graphics technology and human computer interface, which are granted by Korean Intellectual Property Office (KIPO), German Patent and Trade Mark Office (DPMA), Japan Patent Office (JPO) and United States Patent and Trademark Office (USPTO).