"Gate Driving Circuit with Active Pull-Down Function for a Solid-State Pulsed Power Modulator" Chan-Hun Yu, Sung-Roc Jang, Hyoung-Suk Kim, and Hong-Je Ryoo , Trans. On Power Electronics , I.F: 7.224 , VOL. 33 , NO. 1 , pg. 240-247 , Jan.2018

"Development of a 1.5 kV, 1.2 kA pulse power supply for light sintering" Chan-Gi Cho, Seung-Ho Song, Su-Mi Park, Hyeon-Il Park, Jung-Soo Bae, Sung-Roc Jang, and Hong-Je Ryoo , Trans. On Plasma Science , I.F: 1.253 , VOL. 45 , NO. 10 , pg. 2683-2690 , Oct.2017

"A 120-kV, 5-kA Multipurpose Pulsed-Power Generator Using a Semiconductor Switch and Magnetic Pulse Compression" Sung-Roc Jang, Geun- Hie Rim, Chan-Gi Cho, Seung-Ho Song, Su-Mi Park, and Hong-Je Ryoo , Trans. On Plasma Science , I.F: 1.253 , VOL. 45 , NO. 10 , pg. 2678-2682 , Oct.2017

"Compact Design of High Voltage Switch for Pulsed Power Applications" G. N. Appiah, S. R. Jang, J. S. Bae, C. G. Cho, S. H. Song, and H.J. Ryoo , Trans. On Dielectrics and Electrical Insulation , I.F: 1.774 , VOL. 24 , NO. 4 , pg. 2006-2013 , Aug.2017

"Development of 50-kV 100-kW Three-Phase Resonant Converter for 95GHz Gyrotron" Sung-Roc Jang, Jung-Ho Seo, and Hong-Je Ryoo , Trans. On Industrial Electronics , I.F: 7.168 , VOL. 63 , NO. 11 , pg. 6674-6683 , Nov.2016

"Robust Design of a Solid-State Pulsed Power Modulator Based on Modular Stacking Structure" Suk-Ho Ahn, Hong-Je Ryoo, Ji-woong Gong, and Sung-Roc Jang , Trans. On Power Electronics , I.F: 4.953 , VOL. 30 , NO. 5 , pg. 2570-2577 , May.2015

"Design and Implementation of a 40-kV 20-kJs Capacitor Charger for Pulsed-Power Application" Ji-Woong Gong, Hong-Je Ryoo, Suk-Ho Ahn, and Sung-Roc Jang , Trans. On Plasma Science , I.F: 1.101 , VOL. 42 , NO. 11 , pg. 3623-3632 , Oct.2014

"Low-Ripple and High-Precision High-Voltage DC Power Supply for Pulsed Power Applications"  Suk-Ho Ahn, Hong-Je Ryoo, Ji-Woong Gong, and Sung-Roc Jang , Trans. On Plasma Science  , I.F: 1.101 , VOL. 42 , NO. 10 , pg. 3023-3033 , Oct.2014

"Design and Test of 35 kJs High-Voltage Capacitor Charger Based on a Delta-Connected 3-Phase Resonant Converter" Suk-Ho Ahn, Hong-Je Ryoo, Ji-Woong Gong, and Sung-Roc Jang , Trans. On Power Electronics   , I.F: 6.008 , VOL. 29 , NO. 8 , pg. 4039-4048 , Aug.2014

"Design and Implementation of Enhanced Resonant Converter for EV Rapid Charger" Suk-Ho Ahn, Ji-Woong Gong, Sung-Roc Jang, Hong-Je Ryoo and Duk-Heon Kim ,  Journal of Electrical Engineering and Selected Topics in Power Electronics , I.F: 3.129 , VOL. 9 , NO. 1 ,  pg. 143-153 , Jan.2014

"Status of KERI’s pulsed power research and development" Geun Hie Rim, Jongsoo Kim, Yun-Sik Jin, Chuhyun Cho, Hong-Je Ryoo, Sung-Roc Jang, Kyung-Ae Cho, Seong-Jun Hong, and Farag K. Aboelyousr ,  Trans. On Plasma Science , I.F: 0.95 , VOL. 41 , NO. 10 , pg. 2584-2592 , Nov.2013

"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