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Journal Articles

The Concept of dose system for radiological protection

Hirayama, Hideo*; Nakashima, Hiroshi; Sanami, Toshiya*; Yamaguchi, Yasuhiro; Sato, Osamu*; Takagi, Shunji*; Suzuki, Toshikazu*; Iwai, Satoshi*

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 55(2), p.83 - 96, 2013/02

Since the accident at the Fukushima Daiichi Power Plant, units of radiation doses such as Sv have been frequently reported by newspapers. However, it is not exactly understood even by experts on nuclear engineering that there are two different concepts which are the protection quantity such as the effective dose related to a radiation health risk and the practical quantity such as ambient dose equivalents related to measurements. In this special issue, Radiological Protection Quantity, and Operational Quantity and Radiological Protection Quantity, explain the radiation protection dose system including the protection and practical quantities established by ICRP and ICRU. Relation between Dosimeters used at Fukushima etc. and Radiological Protection Quantity describes a method and its problems to measure radiations from Cs on surface and underground using survey meters and personal dosimeters, and convert the measured values to effective doses.

Journal Articles

A One-dimensional propagation of shock wave supported by atmospheric millimeter-wave plasma

Oda, Yasuhisa; Yamaguchi, Toshikazu*; Shiraishi, Yuya*; Komurasaki, Kimiya*; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi

Journal of Infrared, Millimeter, and Terahertz Waves, 32(6), p.877 - 882, 2011/06

 Times Cited Count:8 Percentile:44.5(Engineering, Electrical & Electronic)

Journal Articles

An Experimental study on high power millimeter wave beam transmission for microwave beaming propulsion

Oda, Yasuhisa; Yamaguchi, Toshikazu*; Komurasaki, Kimiya*; Kajiwara, Ken; Takahashi, Koji; Sakamoto, Keishi

Proceedings of IEEE MTT-S International Microwave Workshop Series (IMWS) on Innovative Wireless Power Transmission (IMWS-IWPT 2011), p.181 - 184, 2011/05

Journal Articles

Mutation induction with ion beam irradiation of lateral buds of chrysanthemum and analysis of chimeric structure of induced mutants

Yamaguchi, Hiroyasu*; Shimizu, Akemi*; Hase, Yoshihiro; Degi, Konosuke*; Tanaka, Atsushi; Morishita, Toshikazu*

Euphytica, 165(1), p.97 - 103, 2009/01

 Times Cited Count:29 Percentile:76.74(Agronomy)

We compared the effects of ion-beam and $$gamma$$-ray irradiation on mutation induction in axillary buds of chrysanthemum, and analyzed the chimeric structure of the resulting mutants. Axillary buds were irradiated with carbon ions (mean LET 122 keV/$$mu$$m), helium ions (9 keV/$$mu$$m), and $$gamma$$ rays. The lower five nodes of shoots elongating from the irradiated buds were cut one by one, and new shoots were allowed to grow. This procedure was repeated twice and flower color mutation was investigated. Chimeric structure was analyzed by comparing the flower color of mutants to that of plants regenerated from the roots. All the flower color mutants induced with $$gamma$$ rays were periclinal chimeras. In contrast, some mutants obtained with ion beams had the same flower color as that of the plants derived from the roots. This suggests that they were solid mutants, where both LI and LIII tissues were derived from the same mutated cell.

Journal Articles

Comparison of the mutation inducing effect between ion beams and $$gamma$$-rays; Guineagrass and sorghum

Nakagawa, Hitoshi*; Inafuku, Masashi*; Kusaba, Makoto*; Yamaguchi, Hiroyasu*; Morishita, Toshikazu*; Morita, Ryohei*; Nishimura, Minoru*; Hoeman, S.*; Yokota, Yuichiro; Hase, Yoshihiro; et al.

JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 72, 2008/03

no abstracts in English

Journal Articles

Comparison of the mutation inducing effect between ion beams and $$gamma$$ ray

Morita, Ryohei*; Morishita, Toshikazu*; Nakagawa, Hitoshi*; Nishimura, Minoru*; Yamaguchi, Hiroyasu*; Yokota, Yuichiro; Hase, Yoshihiro; Tanaka, Atsushi

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 78, 2007/02

no abstracts in English

JAEA Reports

Study on analysis method for FBR cores (III)

Takeda, Toshikazu*; Unesaki, Hironobu*; Nakano, Makoto*; Arakawa, Yasushi*; Sakuma, Hiroomi*; Kurisaka, Kenichi*; Ito, Noboru*; Oe, Takashi*; Yamaguchi, Yoshiharu*

PNC TJ2605 87-001, 204 Pages, 1987/03

PNC-TJ2605-87-001.pdf:3.82MB

no abstracts in English

Oral presentation

Comparison of the mutation inducing effect between ion beams and $$gamma$$ rays

Morita, Ryohei*; Morishita, Toshikazu*; Nakagawa, Hitoshi*; Nishimura, Minoru*; Yamaguchi, Hiroyasu*; Yokota, Yuichiro; Hase, Yoshihiro; Tanaka, Atsushi

no journal, , 

no abstracts in English

Oral presentation

Flower breeding by quantum beam technology and their commercialization

Okamura, Masachika*; Momose, Masaki*; Umemoto, Naoyuki*; Toguri, Toshihiro*; Tanaka, Atsushi; Hase, Yoshihiro; Yamaguchi, Hiroyasu*; Morishita, Toshikazu*

no journal, , 

no abstracts in English

Oral presentation

Comparison of the mutagenesis effect between ion beams and $$gamma$$ ray; Guinea grass and sorghum

Nakagawa, Hitoshi*; Inafuku, Masashi*; Kusaba, Makoto*; Yamaguchi, Hiroyasu*; Morishita, Toshikazu*; Morita, Ryohei*; Nishimura, Minoru*; Hoeman, S.*; Yokota, Yuichiro; Hase, Yoshihiro; et al.

no journal, , 

no abstracts in English

Oral presentation

Comparison of "efficiency" between ion beams and $$gamma$$ rays with irradiation to rice seed

Yamaguchi, Hiroyasu*; Hase, Yoshihiro; Tanaka, Atsushi; Shikazono, Naoya; Degi, Konosuke*; Shimizu, Akemi*; Morishita, Toshikazu*

no journal, , 

no abstracts in English

Oral presentation

Difference of chimera structure in mutants induced with ion beam and $$gamma$$ ray irradiation to lateral buds of chrysanthemum

Yamaguchi, Hiroyasu*; Shimizu, Akemi*; Hase, Yoshihiro; Tanaka, Atsushi; Degi, Konosuke*; Morishita, Toshikazu*

no journal, , 

no abstracts in English

Oral presentation

Difference of chimera structure in mutants induced with ion beam and $$gamma$$ ray irradiation to lateral buds of chrysanthemum

Yamaguchi, Hiroyasu*; Shimizu, Akemi*; Hase, Yoshihiro; Tanaka, Atsushi; Degi, Konosuke*; Morishita, Toshikazu*

no journal, , 

no abstracts in English

Oral presentation

Characteristics of the semidwarf mutants of Tartary buckwheat induced by $$gamma$$ rays and ion beams irradiation

Morishita, Toshikazu*; Shimizu, Akemi*; Yamaguchi, Hiroyasu*; Degi, Konosuke*; Mukasa, Yuji*; Aii, Jotaro*; Hase, Yoshihiro; Shikazono, Naoya; Tanaka, Atsushi; Miyazawa, Yutaka*; et al.

no journal, , 

no abstracts in English

Oral presentation

Thrust optimization of the microwave rocket by microwave power and ambient pressure

Shiraishi, Yuya*; Yamaguchi, Toshikazu*; Komurasaki, Kimiya*; Oda, Yasuhisa; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi

no journal, , 

no abstracts in English

Oral presentation

Shock wave in dense gas generated by high power millimeter wave

Oda, Yasuhisa; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi; Yamaguchi, Toshikazu*; Komurasaki, Kimiya*

no journal, , 

Oral presentation

Shock wave generation by atmospheric breakdown plasma on a high power millimeter wave beam

Oda, Yasuhisa; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi; Yamaguchi, Toshikazu*; Komurasaki, Kimiya*

no journal, , 

Oral presentation

Structure formation of atmospheric millimeter wave breakdown on non-gaussian beam

Oda, Yasuhisa; Yamaguchi, Toshikazu*; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Komurasaki, Kimiya*; Sakamoto, Keishi

no journal, , 

Oral presentation

Visualization of millimeter wave plasma for microwave propulsion at the begining of the phenomena

Yamaguchi, Toshikazu*; Oda, Yasuhisa; Shiraishi, Yuya*; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi; Komurasaki, Kimiya*; Arakawa, Yoshihiro*

no journal, , 

no abstracts in English

Oral presentation

Plasma structures of atmospheric millimeter wave breakdown on different beam profiles

Yamaguchi, Toshikazu; Oda, Yasuhisa; Kajiwara, Ken; Takahashi, Koji; Kasugai, Atsushi; Komurasaki, Kimiya*; Sakamoto, Keishi

no journal, , 

no abstracts in English

37 (Records 1-20 displayed on this page)