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Shibano, Junichi*; Kajiwara, Kentaro*; Tsukamoto, Takuya*; Kawai, Hirokazu*; Miura, Setsuo*; Zhang, S.*; Shobu, Takahisa
Zairyo, 63(7), p.533 - 538, 2014/07
A ductile damage progress of an aluminum single crystal with the prior activity of the single slip system under tensile loading was verified by a profile analysis using white X-ray obtained in BL28B2 beam line of SPring-8. In profile analysis, an instrumental function was defined in consideration both of a divergence by slits and a response function peculiar to the energy dispersive method. As a result, dislocation density increased as ductile damage progressed, but it was relatively low near the notch. The influence of a release of the strain energy by a ductile damage progress was expected. The characteristics of ductile damage progress near the notch of the aluminum single crystal with a prior activity of a single slip system under the tensile loading were clarified from the distribution of dislocation density.
Shibano, Junichi*; Kajiwara, Kentaro*; Tsukamoto, Takuya*; Kawai, Hirokazu*; Miura, Setsuo*; Zhang, S.*; Shobu, Takahisa; Kobayashi, Michiaki*
Materials Science Forum, 777, p.176 - 181, 2014/02
Times Cited Count：1 Percentile：53.76(Materials Science, Multidisciplinary)Uchida, Kenichi*; Xiao, J.*; Adachi, Hiroto; Oe, Junichiro; Takahashi, Saburo; Ieda, Junichi; Ota, Takeru*; Kajiwara, Yosuke*; Umezawa, Hiromitsu*; Kawai, Hirotaka*; et al.
Nature Materials, 9(11), p.894 - 897, 2010/11
Times Cited Count：1044 Percentile：99.87(Chemistry, Physical)Thermoelectric generation is an essential function in future energy-saving technologies. However, it has so far been an exclusive feature of electric conductors, a situation which limits its application; conduction electrons are often problematic in the thermal design of devices. Here we report electric voltage generation from heat flowing in an insulator. We reveal that, despite the absence of conduction electrons, the magnetic insulator LaY
Fe
O
can convert a heat flow into a spin voltage. Attached Pt films can then transform this spin voltage into an electric voltage as a result of the inverse spin Hall effect. The experimental result require us to introduce a thermally activated interface spin exchange between LaYFeO and Pt. Our findings extend the range of potential materials for thermoelectric applications and provide a crucial piece of information for understanding the physics of the spin Seebeck effect.
Kubo, Junichi*; Rahman, N.*; Takahashi, Nobuaki; Kawai, Takahiko*; Matsuba, Go*; Nishida, Koji*; Kanaya, Toshiji*; Yamamoto, Masahide*
Journal of Applied Polymer Science, 112(3), p.1647 - 1652, 2009/05
Times Cited Count：25 Percentile：62.54(Polymer Science)Aiming at improvement of mechanical and dielectric properties of poly(vinyl alcohol) (PVA) we prepared composites of PVA and magnesium nitrate. It was found that the composites were very soft and rubber-like, and the glass transition temperature decreased with increasing the salt concentration. Wide-angle X-ray diffraction and small-angle X-ray scattering revealed that the crystallites of PVA were destroyed by the additive and it was a cause of the softening.
Yabuta, Naohiro*; Kawai, Jun*; Hikawa, Tamae*; Tokizawa, Takayuki; Sato, Kazuhiko; Koga, Osamu
JAEA-Review 2008-015, 92 Pages, 2008/11
JAEA-Review-2008-015.pdf:11.88MB
On the closure of uranium mine site at Ningyo-Toge Environmental Engineering Center Japan Atomic Energy Agency, the action plans for risk communication with residence and local governments were developed and implemented. Under a practical program of the risk communication, an ethnographical research on Ningyo-Toge Environmental Engineering Center has been conducted by local high school students. The research was focused on several social groups such as engineers at the Center and residents around Ningyo-Toge and described their circumstances from the past to the present, since the discovery of the uranium outcrop 1955. In the second year of the program, the results of the research were presented at symposium and the students had opportunities to exchange their views with others from different high schools that held in similar programs. Through those activities, the importance of the program was rediscovered and some new issues were also identified.
Yabuta, Naohiro*; Kawai, Jun*; Hikawa, Tamae*; Tokizawa, Takayuki; Sato, Kazuhiko; Koga, Osamu
JAEA-Review 2008-014, 133 Pages, 2008/11
JAEA-Review-2008-014.pdf:11.04MB
On the closure of uranium mine site at Ningyo-Toge, the action plans for risk communication with residence and local governments were developed and implemented. Under a practical program of the risk communication, an ethnographical research on Ningyo-toge has been conducted by local high school students. The research was focused on several social groups such as engineers at the Center and residents around Ningyo-toge and described their circumstances from the past to the present. In addition, it should be noted that as a results, the research project led several effects listed below; (1) High school students understood significance of the uranium development projects implemented at Ningyo-toge, (2) Differences of standpoints between local residents and Ningyo-toge became clearer, (3) Foundation to communicate between local communities and Ningyo-toge was found out, (4) The educational program on an ethnographical research was conducted autonomously by local high school students.
Katayama, Hisato*; Kitamura, Harushige*; Mori, Mari*; Nakagawa, Junya*; Yoshida, Takahiro*; Kawai, Toshihiko*; Hase, Yoshihiro; Tanaka, Atsushi
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 94, 2007/02
no abstracts in English
V
O thin filmIshida, Yukiaki*; Hwang, J. I.*; Kobayashi, Masaki*; Takeda, Yukiharu; Mamiya, Kazutoshi*; Okamoto, Jun*; Fujimori, Shinichi; Okane, Tetsuo; Terai, Kota*; Saito, Yuji; et al.
Applied Physics Letters, 90(2), p.022510_1 - 022510_3, 2007/01
Times Cited Count：23 Percentile：64.21(Physics, Applied)no abstracts in English
Co
O by X-ray magnetic circular dichroismKobayashi, Masaki*; Ishida, Yukiaki*; Hwang, J. I.*; Mizokawa, Takashi*; Fujimori, Atsushi*; Mamiya, Kazutoshi*; Okamoto, Jun*; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; et al.
Physical Review B, 72(20), p.201201_1 - 201201_4, 2005/11
Times Cited Count：140 Percentile：96.06(Materials Science, Multidisciplinary)no abstracts in English
Yabuta, Nohiro*; Kawai, Jun*; Hikawa, Tamae*
JNC TJ6420 2005-001, 88 Pages, 2005/02
JNC-TJ6420-2005-001.pdf:4.27MB
On the closure of uranium production facilities, settled at Ningyo-Toge Environmental Engineering Center and other area in Okayama and Tottori prefectures, action plans for risk communication with residence and local governments were developed and implemented. With the direction of the action plans for risk communication,
Yabuta, Naohiro*; Takizawa, Masayuki*; Hikawa, Tamae*; Kawai, Jun*
JNC TN6400 2004-004, 89 Pages, 2004/03
JNC-TN6400-2004-004.pdf:2.47MB
On the closure of uranium production facilities, settled at Ningyo-Toge Environmental Engineering Center (NTEEC) and other area in Okayama and Tottori prefectures, Action Plans for risk communication with residence and local governments were developed. Firstly, to clarify requirements for risk communication plans, extensive case study for resemblance project of other fields were performed, such as chemical hazards exposure, industrial waste disposal, metal mining site closure and overseas uranium mining site closure. Secondly, with the understanding of societal environment issues around NTEEC, missions of risk communication at NTEEC case were listed. After considerations above, action plans for risk communication on the uranium mining sites remedy at NTEEC were developed. Plans involves several alternatives and were to be performed in building blocks manner. Emergency management plans during pursuing of risk communication plans were also developed.
Shibata, Keiichi; Kawano, Toshihiko*; Nakagawa, Tsuneo; Iwamoto, Osamu; Katakura, Junichi; Fukahori, Tokio; Chiba, Satoshi; Hasegawa, Akira; Murata, Toru*; Matsunobu, Hiroyuki*; et al.
Journal of Nuclear Science and Technology, 39(11), p.1125 - 1136, 2002/11
Times Cited Count：669 Percentile：96.97(Nuclear Science & Technology)Evaluation for JENDL-3.3 has been performed by considering the accumulated feedback information and various benchmark tests of the previous library JENDL-3.2. The major problems of the JENDL-3.2 data were solved by the new library: overestimation of criticality values for thermal fission reactors was improved by the modifications of fission cross sections and fission neutron spectra for 
U; incorrect energy distributions of secondary neutrons from important heavy nuclides were replaced with statistical model calculations; the inconsistency between elemental and isotopic evaluations was removed for medium-heavy nuclides. Moreover, covariance data were provided for 20 nuclides. The reliability of JENDL-3.3 was investigated by the benchmark analyses on reactor and shielding performances. The results of the analyses indicate that JENDL-3.3 predicts various reactor and shielding characteristics better than JENDL-3.2.
Kawai, Katsuo; Endo, Akira; Kuwabara, Jun; Yamaguchi, Takenori; Mizushita, Seiichi
JAERI-Data/Code 2000-001, p.87 - 0, 2000/01
JAERI-Data-Code-2000-001.pdf:5.11MB
no abstracts in English
Kawai, Jun*; Yabuta, Naohiro*; Furuya, Shunsuke*; Sugiyama, Naoki*
JNC TJ1400 2005-021, 350 Pages, 1998/02
Kawai, Jun*; Yabuta, Naohiro*; Furuya, Shunsuke*; Aoki, Norikatsu*
JNC TJ1400 2005-024, 139 Pages, 1995/03
Tokizawa, Takayuki; Matsumura, Toshihiro; Yabuta, Naohiro*; Kawai, Jun*; Hikawa, Tamae*
no journal, ,
An ethnographical research was conducted by the regional high school students for the Ningyo-Toge uranium production facilities. The research was focused on several social groups around Ningyo-Toge such as engineers in the facilities and residents and described past and present circumstances there from the time firstly discovered an uranium ore 50 years ago. In addition, it should be noted that regional communication around Ningyo-Toge were activated while the research project was conducted.
Kitamura, Harushige*; Katayama, Hisato*; Mori, Mari*; Nakagawa, Junya*; Yoshida, Takahiro*; Kawai, Toshihiko*; Hase, Yoshihiro; Tanaka, Atsushi
no journal, ,
no abstracts in English
Kawai, Jun*; Tokizawa, Takayuki; Sato, Kazuhiko; Koga, Osamu
no journal, ,
On the closure of uranium mine site at and around Ningyo-Toge Environmental Engineering Center, the action plans for risk communication with residence and local governments were developed and implemented. As practical plan of the risk communication, support of local voluntary group for planning regionally activating events has been conducted. Opportunities of studying uranium mine site for regional people have implemented in events. In addition, an ethnographical research was conducted by local high school students. Research was focused on earth scientific forming process of uranium deposit.
