- Jeha Ryu, and Pierce, L., "Development of Draft Depth Control System for Mine Clearing BREACHER," Technical Report BREACHER-TMCS-1993, BMY Combat Systems, Aug., 1993
- Jeha Ryu, and Pierce, L., "Development of Terrain Mapping Control System for Mine Clearing BREACHER", Technical Report BREACHER-TMCS-1993, BMY Combat Systems, Aug., 1993.
- Jeha Ryu, and Mirtaheri, M., "Firing and Mobility Analyses of P52 Tracked Combat Vehicle," Technical Report P52-ANALYSIS-1992, BMY Combat Systems, Dec., 1992.
- Jeha Ryu, and Kim, S. S., "A Comprehensive Computational Algorithm for Recursive Multibody Dynamics (Subtitle : Computational Algorithm for New General-Purpose Dynamics Code)," Technical Report R-142, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Body Classes," Technical Report R-146, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Joint Classes," Technical Report R-147, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Decoupled-Loop System Classes," Technical Report R-148, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Force Classes," Technical Report R-149, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Constraint Classes," Technical Report R-150, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Driver Classes," Technical Report R-151, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, and Kim, S. S., "Object-Oriented Software Design/Implementation for Sensor Classes," Technical Report R-152, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Kim, S. S., Ryu, J, Yang, F. C., Jeong, K. Y., Laughlin, J., Sung, S. G., and Chen, J. S., "New General Purpose Dynamic Simulation Code(NGDC) User's Manual(Version 2.0), Technical Report R-161, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Ryu, J, Yang, F. C., Jeong, K. Y., Laughlin, J., Luh, C. M., and Kim, S. S., "New General Purpose Dynamic Simulation Code(NGDC) Example Manual(Version 2.0), Technical Report R-162, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, Kim, S. S., and Kim, S. S., "When Do Stress Stiffening Effects Become Significant in Flexible Multibody Dynamic Systems?" Technical Report R-133, Center for Computer Aided Design, The U. of Iowa, May, 1992.
- Jeha Ryu, Kim, S. S., and Kim, S. S., "A General Approach to Stress Stiffening Effects on Flexible Multibody Dynamic Systems," Technical Report R-100, Center for Computer Aided Design, The U. of Iowa, Mar., 1991.
- Jeha Ryu, and Kim, S. S., and Kim, S. S., "An Efficient Method of Distributing Inertia Loads for Quasi-Static Analysis in Dynamic Stress Computation," Technical Report R-85, Center for Computer Aided Design, The U. of Iowa, Aug., 1990.
