My research interests include Riemann-Hilbert approach to nonlinear integrable systems and WKB approximations with numerical studies of turning points and Stokes lines. These two areas have much in common, including numerical and topological analysis of level curves. My dissertation is on the second transition (second break) in the asymptotic solutions of the semiclassical focusing Nonlinear Sc...

My research interests are in machine perception, particularly the representation, analysis and interpretation of visual and auditory signals. Research in vision and audition is becoming more signiicant in an increasingly computerized world. Artiicial vision and hearing are the technologies that will enable computers to interact more naturally with humans. My interest in machine perception arise...

My primary areas of research are complexity theory and databases. I am also interested in game theory, artificial intelligence, and logic. Everyone has data they want to store. Just as important, you have to be able to get at your data when you need it. This doesn’t just mean having access to the data, but having access to it in a timely manner. Knowing how long it will take to retrieve data fr...

I am interested in the areas of Data Mining, Data Warehousing, and Database Systems applied to the exploration and analysis of large moving object data sets. Recent years have witnessed and enormous increase in moving object data from RFID records in supply chain operations, toll and road sensor readings from vehicles on road networks, or even cell phone usage from different geographic regions....

Conventional wisdom gives us the principle of Design for Security : to create secure software, design it to be secure from the ground up. To date, however, only a small fraction of software developed has followed this principle. Diverse security requirements and economic pressures often force software developers to abandon security and focus instead on functionality and performance. As a result...

My main research interests involve the study of neural information processing, neural coding and information representation in biological systems. In particular I am interested in understanding information processing functions of neural ensemble activity and the biological mechanisms through which these functions are implemented. My current research concentrates on three basic aspects related t...

EDUCATION Mar/00 Aug/04 Ph.D. in Electrical Engineering, Seoul National University (SNU), Seoul, Korea Thesis: Design of adaptive wireless OFDM transceivers (Advisor: Yong-Hwan Lee) Mar/98 Feb/00 M.S. in Electrical Engineering, SNU, Seoul, Korea Thesis: Adaptive channel estimation in pilot channel based DS-CDMA systems Mar/94 Feb/98 B.S. in Electrical Engineering (magna cum laude), SNU, Seoul, ...

2005–present HiStar: a secure operating system [2]. Led the HiStar project on designing and developing a new operating system that allows applications to minimize the amount of trusted code. HiStar allows applications to specify precise data security policies by specifying how different information can flow through the system. As a result, small amounts of trusted code can reason about the secu...