Kabushiki Kaisha Toshiba

Oki Data Corporation

The University of Tokyo

Toshiba Infrastructure Systems & Solutions Corporation

Toshiba Corporation

Denka Company Limited

Makoto Takeda

Takashi Takagi

Koji Nishimura

Yosuke Nakazawa

Shinichi Toda

Moritoshi Sato

Kazuya Kodani

Ikuo Yasuoka

Koki Ikarashi

Mitsuhiro Numazaki

Kenzaburo Tani

Takahiko Minami

Shoji Iwakiri

Maino Tahara

Seiji Kobashi

Shinichi Takada

According to one embodiment, a power conversion apparatus includes: semiconductor elements mutually coupled in parallel; gate drivers which corresponds to the respective semiconductor elements and which supplies a drive voltage to the corresponding semiconductor elements; and a controller configured to supply to the respective gate drivers a gate command corresponding to the drive voltage in accordance with a carrier wave, wherein the semiconductor elements are set to a conductive state at different timings in an operation period of the semiconductor elements.

Power conversion apparatus

The purpose of the present invention is to develop a virus vector, the activity of which is rendered controllable. A virus protein gene derived from an RNA virus is provided in which a gene encoding an optical switch protein is inserted into a foreign gene introducible region of the virus protein so as to enable expression of the gene. By means of this virus vector, it is possible to control, with irradiation of light, enzyme activity of the virus protein and virus vector activity based thereon.

Optically controlled virus protein, gene thereof, and virus vector containing said gene

According to one embodiment, an electronic device includes a positive electrode, a negative electrode, a first terminal, a second terminal, a first plurality of switching elements and anti-parallel diodes coupled between the positive electrode and the first terminal and the second terminal, a second plurality of switching elements and anti-parallel diodes coupled between the negative electrode and the first terminal and the second terminal and a PiN diode coupled between the positive electrode and the negative electrode with reverse polarity.

Power conversion device

According to one embodiment, a heatsink includes a base and heat radiation fins placed on one of surfaces of the base and arranged in parallel to each other with a submillimeter narrow pitch. Each of the multiple heat radiation fins has a submillimeter thickness, a length in a width direction of 60 mm or smaller, and a height of 40 mm or smaller. The heatsink assembly may be constituted by allaying a plurality of the heatsinks and thermally connecting each of the heatsinks to each other using a heat transport device.

Heatsink, heatsink assembly, semiconductor module, and semiconductor device with cooling device

An electrophotographic apparatus includes a photoconductor, a plurality of a series of bump portions formed on a surface of the photoconductor, the bump portions having slopes with respect to a circumferential direction of the photoconductor, and each of the bump portions being spaced apart by a predetermined interval from adjacent bump portions with respect to the circumferential direction.

Electrophotographic apparatus, electrophotographic photoconductor drum, developing device and image forming device

A photosensitive body according to this invention includes a photosensitive layer formed on a surface thereof for being electrically charged and having an electrostatic latent image formed thereon by being exposed to light irradiation, and wherein the photosensitive layer has an initial dynamic friction coefficient &#x3bc;kof 0.6 or less against a prescribed member, and wherein where a dynamic friction coefficient of the photosensitive layer against the prescribed member after a prescribed friction is given is defined as a dynamic friction coefficient &#x3bc;k, the photosensitive layer has a dynamic friction coefficient variation amount &#x394;&#x3bc;k, as a difference between the initial dynamic friction coefficient &#x3bc;kand the dynamic friction coefficient &#x3bc;k, of 0.06 or less. The photosensitive layer having the above mentioned structure has superior durability due to superior wear resistance, so that the photosensitive layer can be made thinner while preventing duration deterioration that may occur with the thinner photosensitive layer.

Photosensitive body, developing unit, and image forming apparatus

Growing community of inventors

Tokyo, Japan

Makoto Takeda