- Ruma, M Ahasan Habib, SHR Hosseini, T. Sakugawa, H. Akiyama, “ Treatment of Wastewater by Underwater Discharge in Gas Bubbling Water”, Int. Journal of Renewable Energy and Environmental Engineering, ISSN 2348-0157, Vol. 03, No. 03, pp. 189-194, July 2015.
- Ruma, S H R Hosseini, M Akiyama, T Sakugawa, P Lukes, and H Akiyama, “Properties of water surface discharge at different pulse repetition rates”, Journal of Applied Physics 116, 123304, October 2014.
- Yoshihara, Ruma, S H R Hosseini, T Sakugawa, and H Akiyama, “Study of hydrogen peroxide generation by water surface discharge”, IEEE Transactions on Plasma Science, Vol.42, No.10, pp.3226-3230, October 2014.
- Ruma, P Lukes, N Aoki, E Spetlikova, S H R Hosseini, T Sakugawa and H Akiyama, ” Effects of pulse frequency of input power on the physical and chemical properties of pulsed streamer discharge plasmas in water”, Journal of Physics D: Applied Physics (j. Phys. D: Appl. Phys), pp. 1-10, 46, February 2013.
- Ruma, N Aoki, T Sakugawa, H Akiyama and M Akiyama, “Hydrogen peroxide generation by pulsed discharge in bubbling water”, IEEJ Transaction on Fundamentals and Materials, Vol. 133, No.12, pp. 636-641, June, 2013.
- Ruma and M A Choudhury, “Two Stage Voltage Control Strategy Using Cûk Regulator with Three Phase Rectifier”, Journal of Electrical Engineering, The Institution of Engineers, Bangladesh,Vol.1, Issue 2, pp. 19-24, June 2011.
- Ruma and M.A. Choudhury, “Power Factor Improvement of a Three Phase Rectifier by Boost Regulator”, Journal of Electrical Engineering, The Institution of Engineers, Bangladesh,Vol.EE 36,No.II, December 2009.
- Ruma, Md. Raju Ahmed and M.A. Choudhury, “Performance Comparisons of Cûk and Boost regulated Rectifier”, Journal of Electrical Engineering, The Institution of Engineers, Bangladesh, Vol.EE 35, No.II, pp. 27-33, December 2008.
- Ruma, H Nagaoka, K Yoshihara, S H R Hosseini, T Sakugawa and H Akiyama, “Removal of organic dye by high-voltage pulsed streamer discharge in gas bubbling water”, 9th International Forum on Strategic Technology (IFOST), IEEE Xplore digital library, pp. 516-518, Cox’s Bazar, Bangladesh, 21-23 October, 2014.
- Ruma, K Yoshihara, H. Nagaoka, S H R Hosseini, T Sakugawa and H Akiyama, ” Characteristics of pulsed discharge plasma processing on water surface for radical generation”, 8th International Conf. on Reactive Plasma, ICRP-8, 4P-PM-S09-P22, Fokuoka, Japan, 4-7 February, 2014.
- Ruma, K Yoshihara, H Nagaoka, T Sakugawa and H Akiyama, “Chemically active species formation by pulsed streamer-like discharge in bubbling water”,International Student Conf. on Advanced Science and Technology, ICAST 2013, Kumamoto university, Japan, pp. 25-26, December 12-13, 2013.
- P Lukes, Ruma, N Aoki, SHR Hosseini, T Sakugawa and H Akiyama, “Effects of pulse frequency on plasmachemical activity of electrical discharge in water”,International Conf. on Phenomena in Ionized Gases, XXXI (31st) ICPIG, Granada, Spain, PS3-061 ISBN N.-(ICPIG.31), pp. 10, July 14-19, 2013.
- Ruma, N Aoki, K Yoshihara, S H R Hosseini, P Lukes, T Sakugawa and H Akiyama, ” Variation of Physical and Chemical Properties of Pulsed Streamer Discharge in Water by Input Power Pulse Repetition Rate”, 4th Euro-Asian Pulsed Power Conference, EAPPC 2012, P. 99, September 30-October 4, 2012, Karlsruhe, Germany.
- Ruma, N Aoki, K Yoshihara, M Akiyama, T Sakugawa, P Lukes and H Akiyama, “Effects of gap distance on hydrogen peroxide generation by pulsed discharge in bubbling water”, 9th International Bioelectrics Symposium, Kumamoto, Japan, Paper No. P-2B-5, September 5-8, 2012.
- Ruma, N. Aoki, H. Miura, M. Akiyama, T Sakugawa and H Akiyama, “Analysis of Hydrogen Peroxide Measurement in Pulsed Discharge Bubbling Water”, IEEJ Conference 2012, pp. 33-37, PPT-12-015, Kumamoto, Japan, March 7-8, 2012.
- Md. Raju Ahmed, Ruma and M.J. Alam, “Improvement of Input Side Current of a Three Phase Rectifier Using Cûk Converter in Discontinuous Conduction Mode Operation”, Second IEEE International Power and Energy Conf. PECon 2008, Johor Bahru, Malaysia, 1st-3rd December, 2008.