- S.W. Hong, T.S. Chung, Y.S. Ryu, H.S. Jang, C.K. Lee, "An Approximation Algorithm for a Queuing Model with Bursty Heterogeneous Input Processes," Lecture Notes in Computer Science, Vol. 3314, Springer-Verlag, Dec. 2004.
- Y.S. Ryu, S.W. Hong, H.S. Jang, C.K. Lee, S.H. Cho, "An Admission Control Algorithm for Scheduling Mixed Traffic in Ubiquitous Environment," Lecture Notes in Computer Science, Vol. 3207, Springer-Verlag, pp.849-858, Aug. 2004.
- H.S. Jang, W.S. Jou, K.H. Min, Y.S. Ryu, C.K. Lee, S.W. Hong , "A Path-based Internet Cache Design for GRID Application," Lecture Notes in Computer Science, Vol. 3033, Springer-Verlag, pp.455-458, Apr. 2004.
- Y.S. Ryu, Y.J. Won, S.H. Cho, "실시간 패킷 스케쥴링을 위한 수락 제어 알고리즘," Journal of Korea Multimedia Society , Vol. 7, No. 9, pp. 1273-1281, Sep. 2004.
- J.Y. Park, D.H. Kim, Y.J. Won, Y.S. Ryu, "Optimizing a Multimedia File System for Streaming Servers," Journal of Korea Information Science Society , Vol. 31 No. 5/6, Jun. 2004.
- Y.S. Ryu, " Scheduling Non-real-time Traffic in Earliest-Deadline-First Packet Scheduler," in Proceedings of International Conference on Communications Systems and Applications (CSA 2004), Banff, Canada, Jul. 2004.
- L.Z. Han, Y.S. Ryu, "Performance Comparison of File Systems on Flash Disk and Hard Disk," in Proceeding of Korea Multimedia Society Fall Conference, Nov. 2004.
- Y.S. Ryu, "Method for Controling Flash Memory Device," Korea Patent Application No. 10-2004-0070322, Sep. 2004