"Design of High-Voltage Capacitor Charger with Improved Efficiency Power Density and Reliability" H. J. Ryoo, S. R. Jang, Y. S. Jin, J. S. Kim, Y. B. Kim,  S. H. Ahn, J. W. Gong, B. H. Lee, and D. H. Kim , Trans. On Dielectrics and Electrical Insulation , I.F: 1.228 , VOL. 20 , NO. 4 , pg. 1076-1084 , Oct.2013

"Design and Comparison of Capacitor Chargers for Solid-State Pulsed Power Modulator" Hong-Je Ryoo, Suk-Ho Ahn, Ji-Woong Gong, and Sung-Roc Jang , Trans. On Plasma Science  , I.F: 0.95 , VOL. 41 , NO. 10 , pg. 2675-2683 , Aug.2013

"Design of High Efficiency 40kV, 150A, 3kHz Solid-State Pulsed Power Modulator" Seung-Bok Ok, Hong-Je Ryoo, Sung-Roc Jang, Suk-Ho Ahn, and Gennadi Goussev , Trans. On Plasma Science  , I.F: 0.868 , VOL. 40 , NO. 10 , pg. 2569-2577 , Feb.2012

"Comparative Study of MOSFET and IGBT for High Repetitive Pulsed Power Modulators" Sung-Roc Jang, Hong-Je Ryoo, Gennadi Goussev, and Geun Hie Rim , Trans. On Plasma Science  , I.F: 0.868 , VOL. 40 , NO. 10 , pg. 2561-2568 , Feb.2012

"Fabrication and Operation Testing of a Duel Resonance Pulse Transformer for PFL Pulse Charging" SooWon Lim, ChuHyun Cho, Hong-Je Ryoo, Jong-Soo Kim, Geun-Hie Rim and Yun-Sik Jin ,  Journal of Korean Physical Society , I.F: 0.464 , VOL. 59 , NO. 6 , pg. 3679-3682 , Dec.2011

"Long Gap Discharge in Water" Yun-Sik Jin, Chuhyun Cho, Hong-Je Ryoo, Jong-Su Kim and Geun-Hie Rim, Korea SooWon Lim , Journal of Korean Physical Society , I.F: 0.464 , VOL. 59 , NO. 6 , pg. 3640-3643 , Dec.2011

"The Design of High Efficiency Soft-Switching Converters for High Power Microwave Generation" Sung-Roc Jang, Suk-Ho Ahn, Hong-Je Ryoo, and Jong-Soo Kim , Journal of Korean Physical Society , I.F: 0.464 , VOL. 59 , NO. 6 , pg. 3688-3693 , Dec.2011

"Development and Optimization of High Voltage Power Supply System for Industrial Magnetron" Sung-Roc Jang, Hong-Je Ryoo, Suk-Ho Ahn, Jongsoo Kim, and Geun Hie Rim ,  Trans. On Industrial Electronics  , I.F: 5.16 , VOL. 59 , NO. 3 , pg. 1453-1461 , Aug.2011

"Compact and High Repetitive Pulsed Power Modulator Based on Semiconductor Switches" S. R. Jang, H. J. Ryoo, and G. Goussev , Trans. On Dielectrics and Electrical Insulation , I.F: 1.094 , VOL. 18 , NO. 4 , pg. 1242-1249 , Aug.2011

"Pulsed-Power System for Leachate Treatment Applications" Sung-Roc Jang, Hong-Je Ryoo, and Seung-Bok Ok , Journal of Power Electronics , I.F: 0.842 , VOL. 11 , NO. 4 , pg. 612-619 , Jul.2011

"Development of Rectangle-Pulse Marx Generator Based on PFN" Hongtao Li, Hong-Je Ryoo, Jong-Soo Kim, Geun-Hie Rim, Young-Bae Kim, and Jianjun Deng , Trans. On Plasma Science  , I.F: 1.043 , VOL. 37 , NO. 1 , pg. 190-194 , Jan.2009