Search Results - "Okamoto, Tatsuki"

Modeling and Analysis of Partial Discharge Phenomena Using Integral Equations by Uehara, Hiroaki, Okamoto, Tatsuki

“…The focus of this study is on partial discharge inception voltage and partial discharge delay time fluctuations that are directly related to the physical…”
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Space charge trapping in electrical potential well caused by permanent and induced dipoles for LDPE/MgO nanocomposite by Takada, T., Hayase, Y., Tanaka, Y.

“…Space charge accumulation in low-density polyethylene film containing a small amount of MgO nanoparticles (LDPE/MgO nanocomposite film) subjected to an…”
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Helical structure of actin stress fibers and its possible contribution to inducing their direction-selective disassembly upon cell shortening by Okamoto, Tatsuki, Matsui, Tsubasa S., Ohishi, Taiki, Deguchi, Shinji

“…Mechanisms of the assembly of actin stress fibers (SFs) have been extensively studied, while those of the disassembly—particularly cell shortening-induced…”
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Circuit Models of Q(t) Data and Analyses of Saturation Time Dependency on Delay Parameters by Kitani, Ryota, Iwata, Shinya, Tsuya, Tomoka, Uehara, Hiroaki, Okamoto, Tatsuki, Takada, Tatsuo

“…In recent years, there has been a considerable increase in the use of DC power equipment in the industry, making it crucial for insulation materials to…”
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Influence of an external electric field on the rupture force of decane, 4-decanone, and dicumyl peroxide molecules: Computational insight by Iwata, Shinya, Uehara, Hiroaki, Okamoto, Tatsuki, Takada, Tatsuo

“…To clarify the degradation of the electrical insulation ability of polymeric materials at the molecular level, the effects of an external electric field on the…”
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Influence of external electric fields and temperature on the behavior of water and acetophenone molecules in C120H242 chains: A molecular dynamics study by Iwata, Shinya, Uehara, Hiroaki, Okamoto, Tatsuki, Sekii, Yasuo, Takada, Tatsuo

“…[Display omitted] •The dynamics of water and acetophenone molecules in C120H242 chains are evaluated.•The effects of external electric fields and temperature…”
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Remaining issues of the degradation models of polymeric insulation used in nuclear power plant safety cables by Fuse, Norikazu, Homma, Hiroya, Okamoto, Tatsuki

“…Aging and degradation phenomena associated with polymeric insulating materials have been investigated over the past 50 years. The results of such…”
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Kinetic degradation model for insulating materials used on nuclear power plant safety cables by Fuse, Norikazu, Homma, Hiroya, Okamoto, Tatsuki

“…A new degradation model for safety cables in nuclear power plants that incorporates the critical antioxidant concentration concept is proposed in order to…”
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Effects of discharge area and surface conductivity on partial discharge behavior in voids under square voltages by Kai Wu, Okamoto, T., Suzuoki, Y.

“…The transitions of partial discharge (PD) behavior with aging in a void under ac voltages with sine wave and square wave were observed. The transition of the…”
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The outlook of the Fundamentals and Materials Society by Okamoto, Tatsuki

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Partial Discharge Current Measurements With Small Discharge Gaps Over Polyimide Film by Okamoto, Tatsuki, Uehara, Hiroaki

“…Partial discharge (PD) characteristics obtained with small gaps are very important to determine the PD resistance of polymers in power equipment. Particularly,…”
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Nanosecond Current Waveforms with Small Discharge Gaps in Needle-Plane Electrode over Three Kinds of Polymer Film by Okamoto, Tatsuki, Uehara, Hiroaki

“…The nanosecond partial discharge (PD) currents have become increasingly important with the recent development of large power modules used in automobile drive…”
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Nanosecond Current Waveforms With Small Discharge Gaps over Polyimide Films by Okamoto, Tatsuki, Uehara, Hiroaki

“…Nanosecond partial discharge (PD) current have been very important with recent development of large power modules used in an automobile drive mechanism. Those…”
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Investigation of Water Tree Degradation in Dry‐Cured and Extruded Three‐Layer (E‐E Type) 6.6‐kV Removed XLPE Cables by KURIHARA, TAKASHI, TSUTSUI, EIJI, NAKANISHI, EIJI, MAKI, KIYOSHI, MURAKAWA, KENICHI, MORIMOTO, KOJI, TAKAHASHI, TOSHIHIRO, OKAMOTO, TATSUKI

“…SUMMARY Dry‐cured and extruded three‐layer (E‐E type) 6.6‐kV cross‐linked polyethylene (XLPE) cables were introduced into electric power systems more than 30…”
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Partial Discharge Current Measurement with Small Discharge Gap over PI, PET, and PEN Films by Okamoto, Tatsuki

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Nanosecond Partial Discharge Current Waveforms with Polyethylene Naphthalate Films on IEC(b) Electrode by Okamoto, Tatsuki, Uehara, Hiroaki

“…The polyethylene naphthalate (PEN) film has been widely applied as a heat‐resistant thin insulation film and sensor film. For the safe and long application of…”
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Compact and large depth of field image scanner for auto document feeder with compound eye system by Kawano, Hiroyuki, Okamoto, Tatsuki, Matsuzawa, Taku, Nakajima, Hajime, Makita, Junko, Toyoda, Yoshitaka, Funakura, Tetsuo, Nakanishi, Takahito, Kunieda, Tatsuya, Minobe, Tadashi

“…We designed a compact and large depth of field image scanner targeted for auto document feeders (ADF) by using a compound eye system design with plural optical…”
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Pulse response measurement for locating water tree degradation in XLPE cables by Hiei, Susumu, Hozumi, Naohiro, Kurihara, Takashi, Okamoto, Tatsuki, Uchida, Katsumi, Tsuji, Taizo

“…Water treeing is a degradation mode of power cable with polymeric insulation. A water tree is composed of small droplets filled with water. As the conductivity…”
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Development of asset management support tools for oil-immersed transformer by Takahashi, Tsuguhiro, Okamoto, Tatsuki

“…Decision support tools (PC programs) for creating a maintenance strategy for electric power equipment based on the asset management technique are being very…”
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Charge Accumulation Dependence on Electric Field, Temperature, and Voltage Application Time in Polymeric Insulating Materials by Current-Integrated Charge Method by Uehara, Hiroaki, Iwata, Shinya, Kitani, Ryota, Okamoto, Tatsuki, Takada, Tatsuo

“…The current-integrated charge (Q(t)) method used in this study can measure all fast-moving carrier charges and accumulated charges, which are shallow and deep…”
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