- K. Lee, K. Jung, Y. Yoon, I.-S. Jeung and K.-S. Jeong, “Development of Plannar Imaging Technique for Spray Characterization,” in The Pacific Rim Conference on Lasers and Electro-Optics, Korea, Aug., 1999.
- Kim, J.-H., J. Sim, J. Kim, Y. Yoon and I.-S. Jeung, “Mixing Enhancement of Hydrogen Diffusion Flames in Supersonic Air using Shock Waves,” in 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, USA, Jun., 1999.
- S.-H. Kim, Y. Yoon, and I.-S. Jeung, “Scaling of Nitric Oxide Emission in Turbulent Hydrogen Jet Diffusion Flames: Effect of Coaxial Air,” in 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, USA, Jun., 1999.
- S.-L. Kim., H.-S. Sim., I.-S. Jeung and Y. Yoon, “A Numerical Study on NOx Emission of Turbulent Nonpremixed Hydrogen Air Flame with Coaxial Air,” in 2nd Asia-Pacific Conference on Combustion, Taiwan, May, 1999.
- Kim, S.-H., Y. Yoon and I.-S. Jeung, “Effect of Coaxial Air on Nitric Oxide Emission in Hydrogen Jet Diffusion Flames,” in 2nd Asia-Pacific Conference on Combustion, Taiwan, May, 1999.
- Kim, J. H., Huh, H., Yoon,Y., Jeung, I.S., and Choi, J. Y., “Effects of Shock Waves On a Supersonic Hydrogen-Air Jet Flame in a Model Scramjet Combustor,” in 2nd Asia-Pacific Conference on Combustion, Taiwan, May, 1999.
- Lee, K, K. Jung, Y. Yoon and I.-S. Jeung, “Semi-Quantitative Measurement of Spray Distribution using Planar Imaging Technique,” in 2nd Asia-Pacific Conference on Combustion, Taiwan, May, 1999.
- Y. Yoon, “Mixing Enhancement of Supersonic Flames using Shock Waves,” in 1st Korean-Australian Workshop on Laser Diagnostics for Combustion, USA, Sept., 1999.