Kabushiki Kaisha Toshiba

Japan Atomic Energy Agency

Shin Hasegawa

Yasunari Maekawa

Kenji Sano

Minoru Saito

Takashi Nakajima

Hideyuki Tsuji

Shiro Maruyama

Yasuyuki Suzuki

Arisa Yamada

Akihiro Matsui

Toshiyuki Saida

Hiroyuki Hayata

Shinichi Sawada

Shuichi Takahashi

A partial discharge monitoring system includes: electromagnetic wave detection sensors disposed in insulating gas enclosures being objects to be monitored, converting devices, and an interface device. The interface device includes: a detecting part detecting a zero cross point of a voltage signal synchronous with a voltage signal applied to conductors disposed in the insulating gas enclosures, and deciding a sampling timing of signals of electromagnetic waves; a transmitting part notifying the sampling timing decided by the detecting part to the converting devices; an integrating part integrating digital data which are received from the converting devices on per converting device basis; and a transmitting part transmitting the integrated digital data to a monitoring device.

Partial discharge monitoring system and partial discharge monitoring method

Provision of, and a method for production of, a polymer electrolyte membrane, which is characterized by introducing a vinyl monomer into an aromatic polymer membrane substrate, typified by polyether ether ketone, polyether imide, or polysulfone, as graft chains by graft polymerization, and then chemically converting some of the graft chains or/and part of the aromatic polymer chain into sulfonic groups.

Polymer electrolyte membrane composed of aromatic polymer membrane base and method for producing the same

According to one embodiment, a desalination treatment membrane includes a desalting membrane and a base material which is disposed in close contact with the desalting membrane, wherein a solid salt is fixed to the base material by a graft-polymerization.

Desalination treatment membrane

Polymer electrolyte membranes for use in fuel cells are produced by first graft polymerizing acrylic acid derivatives or vinylketone derivatives as monomers on polymer substrates and by then performing selective conversion to a sulfonic acid group of hydrogen atoms on the carbon atom adjacent to the carbonyl in the ketone or carboxyl group on the graft chains.

Polymer electrolyte membranes comprising alkyl graft chains and a process for producing the same

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Takasaki, Japan

Shin Hasegawa