Tomohiro Kawashima, Kazuki Yamada, Tetsuhiro Obana, Yoshinobu Murakami, Masayuki Nagao and Naohiro Hozumi: "Fundamental electrical insulation property of slush nitrogen under high electric field", Journal of Physics D: Applied Physics, Vol.59, No.13, 6 pages(2026)
Tomohiro Kawashima, Toru Harigai, Tetsuhiro Obana, Yoshinobu Murakami and Naohiro Hozumi: "Development of Measurement System for Creepage Discharge using Array-type Coaxial Probe", IEEE Transactions on Dielectrica and Electrical Insulation, Vol.33, No.2, pp.968-971(2026)
Yeongguk An, Xiaoxin Li, Tomohiro Kawashima, Yoshinobu Murakami, Yasuhiro Tanaka and Naohiro Hozumi: "Laplace Deconvolution for Improvement of Signal Processing in Space Charge Measurement Applied to Full-scale Cables", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.33, No.2, pp.1212-1220(2026)
Xiaoxin Li, Yeong-Guk An, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Acoustic Propagation Paths for Space-Charge Measurement in Thick Insulating Materials", Chinese Journal of Electrical Engineering, Vol.11, No.3, pp.38-46(2025)
Shafira Zahra, Masaki Utagawa, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Peter Morshuis, Young-Il Cho and Yoon-Hyoung Kim: "Two-dimensional Space Charge Measurement in Cable Joint Model Using the Pulsed Electroacoustic Method", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.31, No.5, pp.2350-2357(2024)
Yoshinobu Murakami, Yujin Ichiba, Tomohiro Kawashima and Naohiro Hozumi: "Filler Particle Size Effect on Electrically and Thermally Properties of Thermal Conductive Thermoplastic Polyimide/Hexagonal Boron Nitride Composite Materials Fabricated by the Electrostatic Adsorption Method", IEEJ Transactions on Electrical and Electronic Engineering, Vol.19, No.10, pp.1590-1595(2024)
Xiaoxin Li, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi and Peter Morshuis: "Calibration for Pulsed Electroacoustic Space Charge Measurement Using Frequency-Resolved Analysis", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.32, No.2, pp.797-904(2024)
Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Muneaki Kurimoto, Shigeyoshi Yoshida, Takahiro Umemoto,,Takahiro Mabuchi and Hirotaka Muto: "Nano-size Filler Effect on Propagation of Electron Avalanche in terms of Waveform Characteristics of Partial Discharge", IEEE Transactions on Dielectrica and Electrical Insulation, Vol.30, No.6, pp.2642-2649(2023)
Ryo Ikenomata, Tomohiro Kawashima, Naohiro Hozumi and Yoshinobu Murakami: "Electrical Properties of Alicyclic Epoxy Resins for Application to Varnish of Rotating Machine Winding", IEEJ Transactions on Electrical and Electronic Engineering, Vol.18, No.10, pp.1583-1588(2023)
Yoshinobu Murakami, Takahisa Wada, Tomohiro Kawashima and Naohiro Hozumi: "Influence of Bridging between Insulating Materials on the Partial Discharge Inception Voltage in Insulating Material-Air Gap-Insulating Material Electrode Systems", IEEJ Transactions on Fundamentals and Materials, Vol.142, No.12, pp.446-450(2022)
Yoshinobu Murakami, Daichi Yamada, Norihiko Kodama, Tomohiro Kawashima, Naohiro Hozumi, Shigeyoshi Yoshida, Takahiro Umemoto, Takahiro Mabuchi and Hirotaka Muto: "Electrical Treeing Breakdown Characteristics of Epoxy/TiO2 Nanocomposites Influenced by Aggregates of Nano-sized TiO2", IEEJ Transactions on Electrical and Electronic Engineering, Vol.17, No.3, pp.486-492(2022)
Yoshinobu Murakami, Takeshi Noda, Tomohiro Kawashima and Naohiro Hozumi: "Electrical treeing breakdown characteristics of epoxy/spherical boron nitride with card-house structure composites", IEEJ Transactions on Electrical and Electronic Engineering, Vol.17, No.2, pp.169-173(2022)
Edo Bagus Prastika, Taichi Shintani, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Tomas Tiong Kwong Soon, Sachiko Yoshida, Ryo Nagaoka and Kazuto Kobayashi: "Time and frequency domain deconvolution for cross-sectional cultured cell observation using an acoustic impedance microscorp", Ultrasonics, Vol.119, No.106601, 9 pages(2022)
Edo Bagus Prastika, Atsushi Imori, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Sachiko Yoshida, Ryo Nagaoka and Kazuto Kobayashi: "Three-dimensional acoustic impedance mapping of human skin by improved time–frequency domain analysis", Japanese Journal of Applied Physics, Vol.60, No.SDDE22, 12 pages(2021)
Yoshinobu Murakami, Akio Kikuike, Norikazu Hamasaki, Tomohiro Kawashima and Naohiro Hozumi: "Development of Thermal Conductive tpPI/oriented h-BN Insulating Composite Material Using the Electrostatic Adsorption Method", IEEJ Transactions on Electrical and Electronic Engineering, Vol.15, No.11, pp.1580-1584(2020)
Takuto Matsui, Kosuke Tatsumi, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi and Toru Matsumoto: "Frequency determination in nondestructive test of semiconductor devices with ultrasound heating", Japanese Journal of Applied Physics, Vol.59, No.SKKBN07, 8 pages(2020)
Kazuyuki YAMADA, Tomohiro KAWASHIMA, Tetsuhiro. OBANA, Yoshinobu MURAKAMI, Masayuki NAGAO and Naohiro HOZUMI: "Discrimination of Partial Discharges in Gaseous and Liquid Nitrogen by Using Waveform Characteristics", Plasma and Fusion Research, Vol.15, pp.24010245-1-24010245-４(2020)
Edo Bagus Prastika, Atsushi Imori, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Sachiko Yoshida, Ryo Nagaoka and Kazuto Kobayashi: "Acoustic impedance interpretation of cross-sectional human skin by using time and frequency domain deconvolution", Japanese Journal of Applied Physics, Vol.59, No.SKKB06, 7 pages(2020)
Eka Putra Waldi, Asri Indah Lestari, Fernandez Rudy, Mulyadi, Syaifa, Yoshinobu Murakami and Naohiro Hozumi: "Rogowski coil sensor in the digitization process to detect partial discharge", Telecommunication Computing Electronics and Control( Telkomnika), Vol.18, No.2, pp.1062-1071(2020))
Nhet Ra, Ryota Yamane, Hiroyuki Futami, Tomohiro Kawashima, Yoshinobu Murakami:"Assessment of charge behavior in water tree‐degraded cables under pulse voltages,IEEJ Transactions on Electrical and Electronic Engineering,Vol14,No8,pp1126-1132(2019)
Nhet Ra, Nur Sabihah Binti Mustafa, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi:"Development of Partial Discharge Measuring Method for Long-Distance Cable Line,IEEJ Transactions on Electrical and Electronic Engineering,Vo14,No7,pp996-1001(2019)
Norikazu Hamasaki, Shuhei Yamaguchi, Shohei Use, Tomohiro Kawashima, Hiroyuki Muto, Masayuki Nagao, Naohiro Hozumi and Yoshinobu Murakami: " Electrical and Thermal Properties of PMMA/h-BN Composite Material Produced by Electrostatic Adsorption Method", IEEJ Transactions on Fundamentals and Materials, Vol.139, No.2, pp.60-65(2019)
Tomohiro Kawashima, Nhet Ra, Yuki Yamashita, Yoshinobu Murakami, Naohiro Hozumi, Kazuyuki Toyama and Masayuki Nagao: " Nonlinear Distortion of AC Dissipation Current Waveform and Space Charge in EVA Film", IEEJ Transactions on Electrical and Electronic Engineering, Vol.138, No.7, pp.948-952(2018)
Yoshinobu Murakami, Tomohiro Kawashima, Naohiro Hozumi, Masayuki Nagao and Masumi Fukuma: " Effect of Interfacial Condition between Film and Earthed Electrode on Space Charge aMeasurement", Sensors and Materials, Vol.29, No.8, pp.1191-1198(2017)
Giovanni Mazzanti, George Chen, John Fothergill, Naohiro Hozumi, Jian Li, Massimo Marzinotto, Peter Morshuis, Frank Mauseth, Clive Reed, Antonios Tzimas, Kai Wu: " A protocol for space charge measurements in full-size HVDC extruded cables", IEEE Transactions on Dielectrics and Electrical Insulation,Volume: 22, Issue: 1Pages: 21 - 34(2014)
Kurihara, T. ; Central Res. Inst. of Electr. Power Ind., Yokosuka, Japan ; Okamoto, T. ; Myong Hwan Kim ; Hozumi, N. : " Measurement of residual charge using pulse voltages for water tree degraded xLPE cables diagnosis", IEEE Transactions on Dielectrics and Electrical Insulation,Volume:2, Issue: 1, pp. 321 - 330 (2014)
Muneaki Kurimoto, Tomohiro Kawashima, Daichi Kusaba, Yoshinobu Murakami and Masayuki Nagao: " DC Dielectric Breakdown Characteristic of Mesoporous-Alumina/Epoxy Composite", IEEJ Transactions on Fundamentals and Materials, Vol.133, No.3, pp.111-115(2013)
Youichi Nakamura,Kengo Fukushima Kusano,Kazufumi Nakamura,Kazuto Kobayashi,Naohiro Hozumi,Yoshifumi Saijo,Tohru Ohe: " A New diagnostic feasibility for cardiomyopathy utilizing acoustic microscopy", World Journal of Cardiovascular Diseases,2013,3,22-30 doi:10.4236/wjcd.2012.31006 Published Online January 2013,doi:10.4236/wjcd.2012.31006 Published Online January 2013(2013)
Eka Putra Waldi, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Breakdown of Air-Polymer Composite Insulation due to Partial Discharge and Influence of Thermal Insulation", IEEJ Transactions on Fundamentals and Materials, Vol.132, No.11, pp.1039-1044(2012)
Yoshinobu Murakami, Hiroki Kitani, Jotaro Shirai, Masayuki Nagao, Norikazu Naito, Kazuhisa Hatano and Hirotoshi Kawamura: " Basic study of aerial flashover characteristics generated from pore of insulating solid", Electrical Engineering in Japan, Vol.180, No.3, pp.9-117(2012)
Jotaro Shirai, Akinao Shigefuku, Yoshinobu Murakami, Naohiro Hozumi, Masayuki Nagao, Kenji Natsume, Norikazu Naito, Kazuhisa Hatano and Hirotoshi Kawamura: " Aerial flashover caused by surface flashover generated from microscopic pores of insulating solid", Electrical Engineering in Japan, Vol.178, No.4, pp.16-23(2012)
Yoshida S, Minowa R, Masaki S, Yamamoto S, Kobayashi K, Hozumi N. : " Charactarization techniques of particular proteins in cerebellar cortex using acoustic impedance microscope.", J Acoust Soc Am. ,131(4)pp.3495.(2012)
Yoshinobu Murakami, Shunsuke Okuzumi, Masayuki Nagao, Masumi Fukuma, Yoitsu Sekiguchi, Manabu Goshowaki and Yoshinao Murata: " Space Charge Measurement in MgO/LDPE Nanocomposite up to Breakdown under DC Ramp Voltage", IEEJ Transactions on Electrical and Electronic Engineering, Vol.5, No.4, pp.395-399(2010)
Yoshinobu Murakami, Masayuki Nagao and Masamitsu Kosaki: " Electrical Insulation Performance of Paper-Ice Composite Insulation System at Cryogenic Temperature", IEEJ Transactions on Electrical and Electronic Engineering, Vol.4, No.5, pp.640-644(2009)
Rudi Kurnianto, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Investigation of Filler Effect on Treeing Phenomenon in Epoxy Resin under ac Voltage", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.15, No.4, pp.1112-1119(2008)
Yoshinobu Murakami, Masanori Nemoto, Shynsuke Okuzumi, Suguru Masuda, Masayuki Nagao, Naohiro Hozumi, Yoitsu Sekiguchi and Yoshinao Murata: " DC Conduction and Electrical Breakdown of MgO/LDPE Nanocomposite", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.15, No.1, pp.33-39(2008)
Yoshinobu Murakami, Nobutaka Hayashi, Eka Putra Waldi, Naohiro Hozumi and Masayuki Nagao: " Estimation of Charge Mobility and Charge Density in Polyimide Film by Charge Chromatography", Japanese Journal of Applied Physics, Vol.46, No.4A, pp.1553-1556(2007)
Rudi Kurnianto, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Characterization of Tree Growth in Filled Epoxy Resin: The Effect of Filler and Moisture Contents", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.14, No.2, pp.427-435(2007)
Rudi Kurnianto, Yoshinobu Murakami, Naohiro Hozumi, Masayuki Nagao and Yoshinao Murata: " Treeing Breakdown in Inorganic-filer/LDPE Nano-composite Material", IEEJ Transactions on Fundamentals and Materials, Vol.127, No.1, pp.29-34(2007)
Atsushi Minoda, Masayuki Nagao, Takehiro Ishizuka, Yoshinobu Murakami, Naohiro Hozumi and Shuichi Yamada: " Flashover characteristics along spacer aｔ cryogenic temperature influenced by minute gaps between spacer and electrode", Fusion Engineering and Design, Vol.81, pp.2577-2582(2006)
Rudi Kurnianto, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " The Use of Fractal Dimension in Characterizing Tree Growth in Filled Epoxy Resin under Humid Conduction", IEEJ Transactions on Fundamentals and Materials, Vol.126, No.11, pp.1187-1192(2006)
Yoshinobu Murakami, Masanori Nemoto, Rudi Kurnianto, Naohiro Hozumi, Masayuki Nagao and Yoshinao Murata: " Space Charge Characteristic of Nano-composite Film of MgO/LDPE ", IEEJ Transactions on Fundamentals and Materials, Vol.126, No.11, pp.1078-1083(2006)
Rudi Kurnianto, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Some Aspects on Treeing Phenomena in Filled Epoxy Resin Under Artificial Tropical Condition", IEEJ Transactions on Fundamentals and Materials, Vol.126, No.6, pp.525-530(2006)
Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: "Surface Temperature Measurement and Analysis of Thermal Breakdown with Ethylene-vinyl Acetate Copolymer in Room-Temperature Region", Japanese Journal of Applied Physics, Vol.43, No.9A, pp.6184-6187(2004)
Kohei Kuroki, Tomohiro Kawashima, Yoshinobu Murakami and Naohirao Hozumi: "Proposal of Approximate Method for Two-Dimensional Electric Field Distribution Using One-Dimensional Space Charge Distribution", The 24th International Symposium on High Voltage Engeneering, No.PS4-26, 4 pages(2025)
Hayato Katsume, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Assessment of Electrical Tree Size in Silicone Gel using Waveform Characteristics of Partial Discharge", The 24th International Symposium on High Voltage Engeneering, No.PS3-37, 4 pages(2025)
Yoshinobu Murakami, Naomine Hamada and Tomohiro Kawashima: "Charge Behavior Measurement in Epoxy/BN Composite Material", The 24th International Symposium on High Voltage Engeneering, No.PS1-40, 4 pages(2025)
Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Fundamental Study on Partial Discharge Measurement in High-Voltage Cable Terminal Joint Model and Waveform Reconstruction by Deconvolution Processing", 2024 10th International Conference on Condition Monitering and Diagnosis (CMD), No.0751, pp.669-672(2024)
Yoshinobu Murakami, Yujin Ichiba, Tomohiro Kawashima and Naohiro Hozumi: "Thermally Properties of Thermal Conductive Thermoplastic Polyimide/Hexagonal Boron Nitride Composite Materials Fabricated by the Electrostatic Adsorption Method", 2024 10th International Conference on Condition Monitering and Diagnosis (CMD), No.0917, pp.550-553(2024)
Shosuke MORITA, Norikazu FUSE, Takayuki MATSUBARA, Yoshinao MURATA, Yoshinobu MURAKAMI and Naohiro HOZUMI: "Novel Space Charge Measurement System for Full-size XLPE cables under Actual Operating Voltage and Temperature Conditions", CIGRE2024 Settion paper, No.11053, 10 pages(2024)
Shafira Zahra, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Insulation Conditions Assessment using Time Series Analysis of Partial Discharge Waveform Characteristics", Proceedings of 14th International Conference on Properties and Applications of Dielectric Materials, No.201, pp.63-66(2024)
Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Condition Assessment of Dielectric Liquid Actuator Based on High Voltage Dielectric Spectrum", Proceedings of 14th International Conference on Properties and Applications of Dielectric Materials, No.200, pp.59-62(2024)
Xiaoxin Li, Shosuke Morita, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Correlative calibration for space charge measurement in cables using PEA method", Proceedings of the 5th International Conference on Dielectrics, No.3C-12, 4 pages(2024)
Shosuke Morita, Norikazu Fuse, Toshihiro Takahashi, Yoshinobu Murakami and Naohiro Hozumi: "Fundamental study for correction technique in space charge measurements of cables under loadcycle using pulsed electro-acoustic method", Proceedings of the 5th International Conference on Dielectrics, No.2-5, 4 pages(2024)
Tomoaki Sakakibara, Tomohiro Kawashima, Naohiro Hozumi and Yoshinobu Murakami: "Measurement of Spark Discharge Inception Voltage Using CIGRE Method-II Type Metal-Air Gap-Metal Electrode System", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.MVP5-3, pp.390-392(2023)
Kana Yasuda, Xiaoxin Li, Tomohiro Kawashima , Yoshinobu Murakami and Naohiro Hozumi: "Observation of Interfacial Charge Formation Process by Space Charge Microscopy", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.MVP4-4, pp.370-373(2023)
Yusuke Sato, Tomohiro Kawashima, Naohiro Hozumi and Yoshinobu Murakami: "Insulating Property Estimation using Q(t) Method of tpPI/hBN Composite Materials Produced by Electrostatic Adsorption Method", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.MVP3-3, pp.277-279(2023)
Xiaoxin Li, Masaki Utagawa, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Calibration of space charge distribution by frequency-resolved analysis", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.MVP1-3, pp.229-232(2023)
Shosuke Morita, Norikazu Fuse, Toshihiro Takahashi, Yoshinobu Murakami and Naohiro Hozumi: "Examination of Electric Field Distribution measured under 24-hour Load Cycle Condition", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.N1, pp.208-211(2023)
Wikanda Nantanawut, Quang Ho, Tomohiro Kawashima, Yoshinobu Murakami, Boonchai Techaumnat and Naohiro Hozumi: "Assessment of Surface Resistivity of Insulation System Using Waveform Characteristics of Partial Discharg", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.G3, pp.107-110(2023)
Tomohiro Kawashima, Quang Ho, Yoshinobu Murakami and Naohiro Hozumi : "Discrimination of Insulation Condition based on Partial Discharge Waveform using Deep Learning", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.F3, pp.92-95(2023)
Shafira Zahra, Masaki Utagawa, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Peter Morshuis, Young-il Cho and Yoon-hyoung Kim: "Two-dimensional Space Charge Measurement of Scaled Cable Joint Model and Signal Compensation", Proceedings of 2023 International Symposium on Electrical Insulating Materials, No.C3, pp.49-51(2023)
An Yeongguk, Xiaoxin Li, Tomohiro Kawashima, and Yoshinobu Murakami: "Signal Processing for Space Charge Measurement Using Laplace Deconvolution", 2022 9th International Conference on Condition Monitering and Diagnosis (CMD), pp.811-814(2022)
Yasuda Kana, Li Xiaoxin, Utagawa Masaki , Kawashima Tomohiro, Murakami Yoshinobu and Hozumi Naohiro: "Three-dimensional Space Charge Microscopy Using a Focused Ultrasound Transducer", 2022 9th International Conference on Condition Monitering and Diagnosis (CMD), No.P4-22, pp.807-810(2022)
Kanta Yoshikawa, Kanata Takeda, Tomohiro Kawashima, and Yoshinobu Murakami: "Reconstruction of Partial Discharge Waveform in Mock Simulated of Insulation Joint by Deconvolution Processing", 2022 9th International Conference on Condition Monitering and Diagnosis (CMD), No.P3-13, pp.619-623(2022)
Keigo Yata, Masaki Utagawa, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Dielectric Spectroscopy under Extremely High Voltages", 2022 9th International Conference on Condition Monitering and Diagnosis (CMD), No.P1-33, pp.392-395(2022)
Quang Ho, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi : "Fundamental Study on Condition Assessment of Insulating Material using Deep Learning based on Waveform Characteristics of Partial Discharge", 2022 9th International Conference on Condition Monitering and Diagnosis (CMD), No.C2-7, pp.241-244(2022)
Naohiro Hozumi, Xiaoxin Li, Tomohiro Kawashima and Yoshinobu Murakami: "Fundamental Study on Calibration of Space Charge Distribution by Frequency-resolved Analysis", 2022 9th International Conference on Condition Monitering and Diagnosis (CMD), No.C1-5, pp.142-145(2022)
Shafira Zahra, Masaki Utagawa, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Peter Morshuis, Young-il Cho and Yoon-hyoung Kim: "Two-dimensional Space Charge Measurement of Scaled Cable Joint Model", Proceedings of the 4th International Conference on Dielectrics, No.4-4, 4 pages(2022)
Xiaoxin LI, Masaki Utagawa, YEONG-GUK AN, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Space Charge Measurement of Thick Insulating Materials", Proceedings of the 4th International Conference on Dielectrics, No.2b-3, 4 pages(2022)
N. Takeda, T. Kawashima, M. Kurimoto, Y. Murakami, N. Hozumi, S. Yoshida, T. Umemoto, T. Mabuchi and H. Muto: "Assessment of charge behavior in electrical tree of composite material based on characteristics of PD waveform", 2020 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, No.E5, pp.334-337(2020)
T. Kawashima, S. Hanamoto, Y. Murakami and N. Hozumi : "Propagation observation of creepage discharge using multi-array coaxial probe", 2020 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, No.2B-2, pp.136-139(2020)
O. Masui, Y. Itakura, T. Kawashima, N. Hozumi and Y. Murakami: "Space Charge Characteristics of Slide-ring Materials under Various Voltage Applications", 2020 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, No.2A-1, pp.108-111(2020)
Nobuyuki Takeda, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Assessment of Charge Behavior in Electrical Tree Tube Based on Characteristics of Partial Discharge Waveform", Proceedings of 2020 International Symposium on Electrical Insulating Materials, No.VL-4, pp.572-575(2020)
Takuto Matsui, Hayato Hayashi, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi and Toru Matsumoto: "Nondestructive Fault Localization of Semiconductor Devices with Ultrasound Heating", Proceedings of 2020 International Symposium on Electrical Insulating Materials, No.VH-4, pp.470-473(2020)
Takeru Tachibana, Kosei Kikuike, Tomohiro Kawashima, Naohiro Hozumi and Yoshinobu Murakami: "Temperature-dependent Electrical and Thermal Characteristics of tpPI/h-BN Composite Insulating Material Using Electrostatic Adsorption Method", Proceedings of 2020 International Symposium on Electrical Insulating Materials, No.VF-2, pp.407-409(2020)
Junichi Hoshi, Kazuya Sakamoto, Tomohiro Kawashima, Naohiro Hozumi, Yoshinobu Murakami, Hiroki Shiota and Kazutake Kadowaki: "Charge Behavior Measurement near the Interface Parallel to the Electric Field", Proceedings of 2020 International Symposium on Electrical Insulating Materials, No.VC-3, pp.325-326(2020)
Edo Bagus Prastika, Shafira Zahra, Xiaoxin Li, Yoshinobu Murakami, Tomohiro Kawashima, Naohiro Hozumi and Yoonhyoung Kim: "The Application of Signal Processing Using Dual Domain Deconvolution for New Space Charge Measurement Method in HVDC Full-Size Cables", Proceedings of 2020 International Symposium on Electrical Insulating Materials, No.VA-5, pp.277-280(2020)
Li, Xiaoxin, Zahra, Shafira, Kawashima, Tomohiro, Murakami, Yoshinobu and Hozumi, Naohiro: "Lock-in Calibration for Space Charge Measurement", Proceedings of the 3rd International Conference on Dielectrics, pp.391-395(2020)
Zahra, Shafira, Kawashima, Tomohiro, Murakami, Yoshinobu and Hozumi, Naohiro: "Small-size Space Charge Measurement Device for Power Cables by Using Electrically Insulated Acoustic Coupler", Proceedings of the 3rd International Conference on Dielectrics, pp.359-362(2020)
Hozumi Naohiro, Prastika Edo Bagus, Zahra Shafira, Kawashima Tomohiro and Murakami Yoshinobu: "Dual-domain Deconvolution Process Applied to Time-resolved Quantitative Dielectric Measurement", Proceedings of the 3rd International Conference on Dielectrics, pp.347-350(2020)
K. Yamada, T. Kawashima, Y. Murakami and , N. Hozumi:"Fundamental study for breakdown characteristic of slush nitrogen as a coolant in superconducting coil",2019 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory,No.6B-7,pp577-580(2019)
T. Kawashima, Totoh Abdul Matin, Y. Murakami, N. Hozumi, S. Yoshida, T. Umemoto, T. Mabuchi and H. Muto:"Fundamental Study for Quantification of Change in PD Waveform on Electrical Treeing",2019 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory,No.4-2,pp418-421(2019)
N. Kodama, D. Yamada, T. Kawashima, N. Hozumi, Y. Murakami, S. Yoshida,T. Umemoto, T. Mabuchi and H. Muto: "Treeing Breakdown Property in Epoxy/TiO2 Nanocomposites",2019 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory,No.2B-3,pp123-126 (2019)
R. Minami, N. Hamasaki, T. Kwashima and Y. Murakami:"Electrical and Thermal Properties of PMMA/h-BN Composite Insulating Materials Produced by Electrostatic Adsorption Method",2019 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory,No.2A-4,pp50-53(2019)
Takuto Matsui, Kousuke Tatsumi, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Shigeru Eura and Toru Matsumoto:"Analysis of sound and temperature fields in ultrasonic beam induced resistance change (SOBIRCH) method aiming to failure analysis for semiconductor devices",The 39th Symposium on Ultrasonic Electronics (USE 2018),No1J2-3(2018)
T. Matsubara, T.Kawashima, N.Hozumi and Y. Murakami : " Electrical Breakdown Characteristics of Epoxy/Hollow Silica Composite Materials", 2018 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.8A-8, pp.708-711(2018)
D.Yamada, D. Isshiki, T.Kawashima, N.Hozumi and Y. Murakami : " Influence of Silica Filler Particle Size in Epoxy Resins on the Electrical Treeing Characteristic", 2018 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.6A-6, pp.423-426(2018)
Shinnosuke Abe, Tomohiro Kawashima, Masayuki Nagao, Naohiro Hozumi, Yoshinobu Murakami, Naruto Miyakawa, Hiroki Shiota and Takao Tsurimoto: " Electrical Treeing Characteristics near Multi-layer Interface", 2017 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.8C-3, pp.741-744(2017)
H. Takahagi, T. Kawashima, N. Hozumi and Y. Murakami : " Spark Discharge Inception Voltage under Surge Voltage Application Influenced by Air Gap Length ", 2017 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.6B-2, pp.525-528(2017)
S. Yamaguchi, N. Hamasaki, S. Use, T. Kawashima, H. Muto, M. Nagao, N. Hozumi and Y. Murakami: " Influence of PMMA and h-BN Particles Sizes on Electrical and Thermal Properties of PMMA/h-BN Composite Materials Produced by Electrostatic Adsorption Method", 2017 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.4A-1, pp.245-248(2017)
Naohiro Hozumi: " Space Charge Measurement System for Full-scale HVDC Cables", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.DM-8, p.796(2017)
Tomohiro Kawashima, Hideyuki Takahagi, Ryoto Kubota, Yoshinobu Murakami, Naohiro Hozumi and Masasyuki Nagao: " Influence of Surface Charge on Insulating Sheet on Partial Discharge Inception Voltage ", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.DN-5, p.792(2017)
Hiroaki Fujimoto, Tomohiro Kawashima, Masyuki Nagao, Naohiro Hozumi and Yoshinobu Murakami: " Flashover Inception Voltage Characteristic on Polyimid Surface under Surge Voltage Application", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.V2-27, pp.585-588(2018)
Hiroyuki Futami, Nhet Ra, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Takashi Kurihara, Tatsuki Okamoto, Kazuhisa Miyajima and Katsumi Uchida: " Study on Short Time Charge Behavior in Pulsed Residual Charge Method for Water Tree Diagnostics of XLPE Cables", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.V2-20, pp.559-562(2017)
Norikazu Hamasaki, Shuhei Yamaguchi, Shohei Use, Tomohiro Kawashima, Hiroyuki Muto, Masyuki Nagao, Naohiro Hozumi and Yoshinobu Murakami: " Influence of Filler Orientation and Molding Temperature on Electrical and Thermal Properties of PMMA/h-BN Composite Material Produced by Electrostatic Adsorption Method ", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.V2-1, pp.485-466(2017)
Nhet Ra, Nur Sabihah Binti Mustafa, Hiroyuki Futami, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi and Toshihiro Takahashi: " Development of The New Partial Discharge Measuring Method and Device for Long Power Cable using Foil Electrode ", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.P1-12, pp.347-350(2017)
Nhet Ra, Hiroyuki Futami, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi, Takashi Kurihara and Tatsuki Okamoto: " Study on Charge Dynamics in Water-Tree XLPE Insulation for Deterioration Diagnosis", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.P1-11, pp.343-346(2017)
Tomohiro Kawashima, Hideyuki Takahagi, Ryoto Kubota, Yoshinobu Murakami, Naohiro Hozumi and Masasyuki Nagao: " Partial Discharge Inception Voltage under Positive Surge Voltage Application Influenced by Surface Charge on Polyimide Film", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.SPD3, pp.163-166(2017)
Yusuke Kikuchi, Takahiro Ishida, Takahisa Ueno, Seiji Kanazawa, Masayuki Nagao, Masayuki Hikita, Yoshinobu Murakami and Masayoshi Nagata: " Recent Progress in Round-Robin Test of Repetitive Partial Discharge Inception Voltage Measurements on Complete Winding of 4 kW Random-Wound Motor", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.SPD2, pp.159-162(2017)
Antonino Imburgia, Pietro Romano, Fabio Viola, Naohiro Hozumi and Shosuke Morita: " Partial Discharges Behavior Under Different Rectified Waveforms ", Proceedings of 2017 International Symposium on Electrical Insulating Materials USB Memory, No.E3, pp.114-117(2017)
S. Use, T. Kawashima, M. Nagao and Y.Murakami : " Development of Thermal Conductive PMMA/BN Electric Insulating Composite Material Produced by Electrostatic Adsorption Method ", 2016 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.4B-11, pp.380-383(2016)
S. Ishikawa, T. Kawashima, M. Nagao and Y. Murakami : " Electrical Breakdown Characteristics of Dielectric Elastomer under Various Conditions ", 2016 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.4B-9, pp.371-374(2016)
Tomohiro Kawashima, Yup Pui San, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Effects of Partial Discharge on DC Breakdown Characteristics of Paper-Ice Composite Insulation System in Liquid Nitrogen", 2016 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3C-18, pp.235-238(2016)
R. Kubota, T. Kawashima, Y. Murakami and M. Nagao: " Partial Discharge Inception Voltage under Surge Voltage Application Influenced by Surface Charge on Insulating Sheet ", 2016 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3C-2, pp.171-174(2016)
Tomohiro Kawashima, Yuki Yamashita, Yoshinobu Murakami, Naohiro Hozumi, Masayuki Nagao and Kazuyuki Toyama: " Nonlinear Distortion of AC Dissipation Current Waveform and Space Charge in EVA Film", Proceedings of the 1st International Conference on Dielectrics, No.Poster 02-8(2016)
H. Tanaka, T. Kawashima, Y. Murakamiand M. Nagao: " Flashover Characteristics of Silicone Rubber Surface Influenced by Surface Charge", 2015 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.8C-6, pp.836-839(2015)
Yoshinobu Murakami, Atsuhiro Fujii, Tomohiro Kawashima and Masayuki Nagao: " Development of Thermal Conductive PMMA/BN Electric Insulating Composite Material Using Electrostatic Adsorption Method", 2015 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.8A-6, pp.680-683(2015)
M. Kida, T. Kawashima, Y. Murakami and M. Nagao: " AC Partial Discharge Characteristic at Minute Air Gap Under Non-Uniform Electric Field", 2015 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.4B-1, pp.322-325(2015))
Masayuki Nagao: "Electrical Breakdown of Polymeric Insulating Materils", Proceedings of 11th International Conference on Properties and Applications of Dielectric Materials, No.PLE-4(2015)
Yoshinobu Murakami, Takuma Sugiyama, Tomohiro Kawashima, Masayuki Nagao and Masumi Fukuma: " Signal Recovery of Space Chrge Distribution Using Acoustic Property in PEA Method", Proceedings of 11th International Conference on Properties and Applications of Dielectric Materials, No.SC2-1(2015)
Kaito INOUE, Kazuya YOKOMI, Tomohiro KAWASHIMA, Yoshinobu MURAKAMi, Takahiro ISHIDA and Masayuki NAGAO: " Influence of surface charge distribution on insulating sheet on partial discharge inception voltage under DC voltage application", The 4th International Symposium on Technology for Sustainability, No.451(2014)
Atsuhiro Fujii, Yoshinobu Murakami, Tomohiro Kawashima, Hiroyuki Muto and Masayuki Nagao: " Development of PMMA/BN Composite Insulating Material using Electrostatic Absorption Method", The 4th International Symposium on Technology for Sustainability, No.441(2014)
Y. Murakami, H. Suzuki, T. Kwashima and M. Nagao: " Electrical Characteristics of PVDF/BTO Nanocomoposites Under DC Voltage Applicatio", 2014 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.８A-5, pp.683-686(2014)
T. Kawashima, Y. Murakami, M. Nagao, Y. Inagaki, Y. Ashibe and T. Masuda: " DC prestressing effect on breakdown characteristic of insulating paper in liquid nitrogen and insulating oil", 2014 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3A-20, pp.138-141(2014)
M. Yamada, Y. Murakami, T. Kawashima and M. Nagao: " Electrical Breakdown of Dielectric Elastomer and Lamination Effect", 2014 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3A-17, pp.126-129(2014)
T. Sugiyama, M. UQBAH, A. Ishikawa, T. Kawashima, Y. Murakami, M. Fukuma and M. Nagao: " Development of a Space Charge Measurement Method without a Semiconducting Electrode", Proceedings of 2014 International Symposium on Electrical Insulating Materials USB Memory, No.VB10, pp.397-400(2014)
Tomohiro Kawashima, Yoshinobu Murakami, Masayuki Nagao, Yoshihiro Inagaki, Yuichi Ashibe and Takato Masuda: " Influence of Prestressing on The Breakdown of Insulating Paper-Liquid Nitrogen Composite System", Proceedings of 2014 International Symposium on Electrical Insulating Materials USB Memory, No.VA24, pp.272-275(2014)
MyonHwan Kim, Taketo Unok, Yoshinobu Murakami, Masayuki Nagao, Takashi Kurihara, Tatsuki Okamoto, Kazuhisa Miyajima, Katsumi Uchida and Naohiro Hozumi: " Study on Water Tree Degradation Diagnosis of XLPE Cable Using Charge Radar", Proceedings of 2014 International Symposium on Electrical Insulating Materials USB Memory, No.F4, pp.148-151(2014)
Yoshinobu Murakami, Takuma Sugiyama, Tomohiro Kawashim, Masumi Fukuma and Masayuki Nagao: " Space Charge Measurement System Equipped with a Function to Measure Acoustic Properties", Proceedings of 2014 International Symposium on Electrical Insulating Materials USB Memory, No.DS1, p.156(2014)
Mizuki Tairako, Tomohiro Kawashima, Yoshinobu Murakami and Masayuki Nagao: " Surface Electrical Insulation Performance of Silicone Rubber under DC Voltage Application", The 3rd International Symposium on Technology for Sustainability, No.245(2013)
Tomohiro Kawashima, Muneaki Kurimoto, Yoshinobu Murakami and Masayuki Nagao: " Dielectric Characteristic of Insulating Paper — Ice Composite Material in Liquid Nitrogen", IEEJ Transactions on Fundamentals and Materials, Vol.133, No.3, pp.123-124(2013)
Y. Murakami, T. Sugiyama, R. Funo, M. Fukuma and M. Nagao: " Influence of Interfacial Condition between Film and Lower Electrode on Space Charge Measurement", 2013 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.8A-3, pp.1602-1605(2013)
Ryo Kawashima, Yoshinobu Murakami, Hiroki Shiota, Takao Tsurimoto and Masayuki Nagao: " Electrical Treeing Characteristics Influenced by Filler Added Into One Side of the Insulation Layers", 2013 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3D-8, pp.518-521(2013)
Yoshinobu Murakami and Geroge Chen: " Influence of Film Thickness on Space Charge Formation under dc Ramp Voltage", Proccedings of the 2013 IEEE International Conference on Solid Dielectrics, pp.448-451(2013)
T. Kawashima, M. Kurimoto, Y. Murakami, M. Nagao, Y. Inagaki, Y. Ashibe and H. Hirota: " Influence of DC Prestress on Impulse Breakdown Strength of Insulating Paper-liquid Nitrogen Composite System", 2012 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, pp.361-364(2012)
M. Nagao, N. Takamura, M. Kurimoto, Y. Murakami, Y. Inoue and Y. Murata: " Simultaneous Measurement of Space Charge and Conduction Current on LDPE/MgO Nanocomposite", 2012 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, pp.311-314(2012)
M. Kurimoto, T. Kawashima, H. Suzuki, Y. Murakami and M. Nagao: " Dielectric Permittivity Characteristic of Mesoporous-Alumina/Epoxy Composite", 2012 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, pp.307-310(2012)
Myong Hwan Kim, Naohiro Hozumi, Yoshinobu Murakami, Masayuki Nagao, Takashi Kurihara, Tatsuki Okamoto, Taizo Tsuji and Katsumi Uchida: " Location of Water Tree Degradation in a Long Polymeric Cable Line", Proceedings of 2012 IEEE International Conference on Condition Monitoring and Diagnosis, No.IL-7/G-44, pp.141-144(2012)
Muneaki Kurimoto, MohdArif Bin MohdAzman, Risyun Kin, Yoshinobu Murakami and Masayuki Nagao: " Influence of Surface Roughness on Hydrophobic Stability of Silicone Rubber Composites in Dynamic Drop Test", Proceedings of 10th International Conference on Properties and Applications of Dielectric Materials, No.2.5.5(2012)
Muneaki Kurimoto, Tomohiro Kawashima, Hidenori Suzuki, Yoshinobu Murakami and Masayuki Nagao: " Specific Gravity and Dielectric Permittivity Characteristics of Mesoporous-Alumina/Epoxy Composite ", Proceedings of 10th International Conference on Properties and Applications of Dielectric Materials, No.1.3.3(2012)
Muneaki Kurimoto, Yutaka Takenaka, Yoshinobu Murakami and Masayuki Nagao: " Compatibility Evaluation between Dielectric Breakdown Strength and Thermal Conduction in Epoxy/Boron-nitride Composite", 2011 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.5B-11, pp.542-545(2011)
Masayuki Nagao, Muneaki Kurimoto, Ryosuke Takahashi, Yoshinobu Murakami, Takashi Nishimura, Yuichi Ashibe and Takato Masuda: " Dielectric Breakdown Mechanism of PPLP in Liquid Nitrogen Due to Laminated Structure", 2011 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.4-3, pp.419-422(2011)
Yoshinobu Murakami, Soichi Imazawa, Muneaki Kurimoto, Masayuki Nagao, Yoitsu Sekiguchi, C. C. Reddy and Yoshinao Murata: " DC Breakdown Characteristic on LDPE/MgO Nanocomposite Influenced by DC Prestress", 2011 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3B-9, pp.334-337(2011)
Yuuya Shimizu, Yoshinobu Murakami, Muneaki Kurimoto and Masayuki Nagao: " Study of Possibility of Electrical Control on Drug Movement in Tape for Percutaneous Absorption", 2011 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena USB-Memory, No.3B-5, pp.260-263(2011)
T. Kawashima, M. Kurimoto, Y. Murakami and M. Nagao: " Dielectric Characteristic of Insulating Paper - Ice Composite Material in Liquid Nitrogen", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP2-27, pp.433-436(2011)
N. Takamura, Y. Murakami, M. Kurimoto, M. Nagao, Y. Inoue, C. C. Reddy and Y. Murata: " Space Charge Formation and Conduction Current in LDPE/MgO Nanocomposite under DC Ramp Field", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP2-12, pp.374-377(2011)
R. Kin, M. Kuriomto, Y. Murakami and M. Nagao: " Dynamic Behavior of Water Droplet on Silicone Rubber Surface in Dynamic Drop Test", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP1-7, pp.249-252(2011)
Y. Murakami, S. Kida, M. kurimoto, M. Nagao and N. Hozumi: " Visualization of Electrical Trees by 80 MHz-band Pulsed Ultrasound", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.GB4, pp.209-212(2011)
M. Kurimoto, D. Kusaba, H. Suzuki, Y. Murakami and M. Nagao: " DC Dielectric Breakdown Characteristics of Mesoporous-Alumina/Epoxy Composite", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.FB7, pp.165-168(2011)
MyongHwan Kim, Yoshinobu Murakami, Masayuki Nagao, Takashi Kurihara, Tatsuki Okamoto, Taizo Tsuji and Naohiro Hozumi: " Fundamental Study on Location of Water Tree Degradation in Power Cables", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.E6, pp.113-116(2011)
Masami Fukuma, Ruji Funo, Yoshinobu Murakami, Masayuki Nagao and Naohiro Hozumi: " Measurement of Acoustic Property for Signal Recovery in PEA method", Proceedings of 2011 International Symposium on Electrical Insulating Materials CD-ROM, No.C7, pp.69-72(2011)
Y. Murakami, T. Okazaki, M. Nagao, Y. Sekiguchi, C. C. Reddy and Y. Murata: " Space Charge Formation and Conduction Current of MgO/LDPE Nanocomosite", 2010 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.556-559(2010)
K. Kimura, M. Hikita, N. Hayakawa, M. Nagata, K. Kadowaki and Y. Murakami: " Round-Robin Test on Repetitive PD Inception Voltage of Twisted-Pairs", 2010 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.489-492(2010)
Takahiro Takino, Kenji Nanao, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Evaluation of Partial Discharge Under Inverter Surge Application Using Current Waveform", 2010 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.446-449(2010)
S. Torimoto, S. Koike, Y. Murakami and M. Nagao: " Specimen Development for Evaluating Electrical Properties and Study of Breakdown Mechanism on Extremely Thin PEN Film", 2010 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.381-384(2010)
Y. Murakami, T. Okazaki, M. Nagao, Y. Sekiguchi, C. C. Reddy and Y. Murata: " Space Charge Formation in Low-Density Polyethylene Up to Breakdown Influenced by Addition of MgO Nano-Filler Under DC Ramp Voltage", 2009 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, No.7B-12(2009)
T. Okazaki, S. Okuzumi, S. Imazawa, Y. Murakami, M. Nagao, Y. Sekiguchi, C. C. Reddy and Y. Murata: " Electric Characteristics of MgO/LDPE Nanocomposite up to Breakdown under DC Ramp Voltage", 2009 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, No.7B-5(2009)
Takahiro Takino, Kenji Nanao, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Observation of Partial Discharge Current Waveform under Inverter Surge Application", 2009 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, No.5A-20(2009)
Masato Kawano, Yoshinobu Murakami, Masayuki Nagao, Yoitsu Sekiguchi, C. C. Reddy and Yoshinao Murata: " Treeing Breakdown Phenomena in MgO/LDPE Nanocomposite Material", Proceedings of 9th International Conference on Properties and Applications of Dielectric Materials, No.H-28, pp.837-840(2009)
Shunsuke Okuzumi, Yoshinobu Murakami, Masayuki Nagao, Yoitsu Sekiguchi, Ch. Chakradhar Reddy and Yoshinao Murata: " DC Breakdown Strength and Conduction Current of MgO/LDPE Composite Influenced by Filler Size", 2008 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, pp.722-725(2008)
Shunta Imai, Kazuyuki Tohyama, Yoshinobu Murakami and Masayuki Nagao: " Frequency Dependence of Electroluminescence and Dissipation Current Waveform in LDPE Film", 2008 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, pp.694-697(2008)
Y. Murakami, T. Okazaki, S. Okuzumi, M. Nagao, Y. Sekiguchi, C. C. Reddy and Y. Murata: " Temperature Dependent Space Charge Formation Up to the Breakdown Under DC Ramp Voltage in MgO/LDPE Nanocomposite", 2008 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, pp.686-689(2008)
Kenji Nanao, Yoshinobu Murakami and Masayuki Nagao: " Analysis of Internal Partial Discharge Based on PD Current Waveform", 2008 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena CD-ROM, pp.475-478(2008)
M. Nagao, S. Watanabe, Y. Murakami , Y. Murata, Y. Sekiguchi and M. Goshowaki: " Water Tree Retardation of MgO/LDPE and MgO/XLPE Nanocomposites", Proceedings of 2008 International Symposium on Electrical Insulating Materials CD-ROM, No.P2-27, pp.483-486(2008)
Yoshinobu Murakami, Shunsuke Okuzumi, Masayuki Nagao, Masumi Fukuma, Yoitsu Sekiguchi, and Manabu Goshowaki: " The Space Charge Measurement in MgO/LDPE Nanocomposite up to the Breakdown under DC Ramp Voltage", Proceedings of 2008 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP1-4-5, pp.159-162(2008)
A. Fujita, K. Tohyama, Y. Murakami , M. Nagao, M. Goshowaki, Y. Sekiguchi and Y. Murata: " Charge Behavior Observation in LDPE/MgO Nanocomposite Material under AC High Field", Proceedings of 2008 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP1-4-6, pp.151-154(2008)
T. Kobayashi, T. Takai , Y. Murakami , M. Nagao, M. Satou and Y. Itou: " Temporal Change of Accumulated Charge and Diffusion of Drug in Tape for Percutaneous Absorption", Proceedings of 2008 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP1-4-2, pp.143-146(2008)
Y. Tanaka, E. Nakamura, Y. Murakami, S. Yamada and M. Nagao: " Identification of Surface Discharge Based on Discharge Current Waveform in Composite Insulation System of LN2 and Solid Insulator", Proceedings of 2008 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP1-3-7, pp.135-138(2008)
Y. Kurimoto, Y. Tashiro, Y. Murakami, H. Homma and M. Nagao: " Variation of Leakage Current Caused by Hydrophobicity Loss of Silicone Rubber in Dynamic Drop Test", Proceedings of 2008 International Symposium on Electrical Insulating Materials CD-ROM, No.MVP1-3-1, pp.111-114(2008)
Masayuki Nagao, Yoshinobu Murakami, Yoshinao Murata , Yasyhiro Tanaka, Yoshimichi Ohki and Toshikatsu Tanaka: " Material Challenge of MgO/LDPE Nanocomposite for High Field Electrical Insulation", CIGRE2008 Set of papers CD-ROM, Vol.42, No.D1-301, pp.1-8(2008)
Eka Putra Waldi, Yoshinobu Murakami and Masayuki Nagao: " Effect of Humidity on Breakdown of Low Density Polyethylene Film due to Partial Discharge", Proceedings of 2008 International Conference on Condition Monitoring and Diagnosis, No.G-6, pp.655-658(2008)
Y. Murakami, M. Nagao, Y. Sekiguchi and Y. Murata: " Assessment of diffusion coefficient of acetophenone in insulating polymer by using conduction current measurement", 2007 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.776-779(2007)
Suguru Masuda, Shunsuke Okuzumi, Rudi Kurnianto, Yoshinobu Murakami, Masayuki Nagao, Yoshinao Murata and Yoitsu Sekiguchi: " DC Conduction and Electrical Breakdown of MgO/LDPE Nanocomposite", 2007 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.290-293(2007)
R. Kurnianto, Y. Murakami, N. Hozumi, M. Nagao and Y. Murata: " Some Fundamentals on Treeing Breakdown in Inorganic-filler/LDPE Nano-composite Material", 2006 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.373-376(2006)
Eka PW, Y. Murakami, N. Hozumi and M. Nagao: " Heat Effect of Discharge on Breakdown of Air-polymer Composite Insulation", Proceedings of 8th International Conference on Properties and Applications of Dielectric Materials, No.P2-14, pp.518-521(2006)
Zainuddin Nawawi, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Effect of Humidity on Time Lag of Partial Discharge in Insulation-Gap-Insulation System", Proceedings of 8th International Conference on Properties and Applications of Dielectric Materials, No.G-6, pp.199-203(2006)
Y. Murakami, S. Okada, T. Takai, N. Hozumi, M. Nagao, A. Tani and M. Ezoe: " Visualization of Diffusion Process of an Antistatic Agent in Insulating Polymer Using Space Charge Measurement and Its Numerical", Proceedings of 8th International Conference on Properties and Applications of Dielectric Materials, No.E-4, pp.143-146(2006)
R. Kurnianto, Y. Murakami, N. Hozumi and M. Nagao: " Characterization of Tree Growth in Inorganic-filler/Epoxy Resin Composite Material", Proceedings of 8th International Conference on Properties and Applications of Dielectric Materials, No.D4, pp.123-126(2006)
Yoshinao Murata, Youitsu Sekiguchi, Yoshiyuki Inoue, Mamoru Kodama, Yoshinobu Murakami, Masanori Nemoto, Naohiro Hozumi and Masayuki Nagao: " Basic Study on Filler Added Insulation Material for HVDC Extruded Cable",2005 Korea-Japan Joint Symposium on ED & HVE, pp.6-9(2005)
Y. Murata, Y. Murakami, M. Nemoto, Y. Sekiguchi, Y. Inoue, M. Kodama, N. Hozumi and M. Nagao: "Effect of Nano-sized MgO-filler on Electrical Phenomena under DC Voltage Application in LDPE", 2005 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.158-161(2005)
Rudi Kurnianto, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: " Electrical Tree Propagation in Epoxy Resin under Different Characteristics", Proceedings of 2005 International Symposium on Electrical Insulating Materials, pp.718-720(2005)
Naohiro Hozumi, Tetsuo Nakamae, Yoshinobu Murakami, Masayuki Nagao, Katsumi Uchida, Gilbert Teyssedre and Christian Laurent: " Study on Space Charge Behavior Reled to the Residual Charge Method for Diagnosing Water Tree Degradation of Polymer Insulated Power Cables", Proceedings of 2005 International Symposium on Electrical Insulating Materials, pp.588-591(2005)
Y. Murakami, M. Nemoto, N. Hozumi and M. Nagao: " Carrier Mobility in Insulating Polymer Influenced by Hsyteresis of Applied Voltage", Proceedings of 2005 International Symposium on Electrical Insulating Materials, pp.572-575(2005)
Atsushi Tani, Minoru Ezoe, Noriko Abe, Yoshinobu Murakami, Naohiro Hozumi and Masayuki Nagao: "A Study of the Antistatic Agent Behavior By Space Charge Observation", Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, pp.190-192(2004)
Y. Murakami, N. Hozumi, M. Nagao, S. Mitsumoto and M. Fukuma: "Analysis of Thermal Breakdown Process with EVA Film in Room Temperature Region", Proceedings of 7th International conference on properties and Applications of Dielectric Materials, No.S12-4, pp.962-965(2003)
M. Nagao, Y. Murakami, N. Hozumi and M. Fukuma: "Space Charge Measurement in EVA film at Cryogenic through Room Temperature Region", The 2001 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, pp.496-499(2001)
Naohiro Hozumi, Hiromi Matusmura, Yoshinobu Murakami, Yuji Muramoto, Masayuki Nagao and Shin-ichi Mitsumoto: "Carrier Mobility in Acetophenone-soaked Polyethylene Estimated by Transient Space Charge", Proceedings of 6th International Conference on Properties and Applications of Dielectric Materials, pp.943-946(2000)
Shafira Zahra、Tomohiro Kawashima、Yoshinobu Murakami、Naohiro Hozumi：「Simplification of Dielectric Breakdown Test Using a Multi-Element Electrode System and its Weibull Analysis」、電気学会研究会資料 誘電･絶縁材料/電線・ケーブル合同研究会 DEI-25-067～78/ EWC-25-005～016、No.DEI-25-049/EWC-25-012、pp.45-48(2025)
Soshiro Murata, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Fundamental Study on Waveform Characteristics Analysis of Partial Discharge in Artificial Defect at Cryogenic", The 1st Asian Symposium for Building Future of Plasma, 1 page(2024)
An Yeongguk, Xiaoxin Li, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Improvement Stability of Signal for Interpreting Space Charge by Using Laplace Deconvolution", 第53回 電気電子絶縁材料システムシンポジウム予稿集, No.MVP-1-5, pp.179-180(2022)
Quang Heo, Tomohiro Kawashima, Yoshinobu Murakami and Naohiro Hozumi: "Fundamental study on classification of partial discharge waveform by deep learning", The 2022 ANNUAL MEETING RECORD I.E.E. JAPAN, No.2-002, p.2(2022)
