Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Wang, Y.*; Kajihara, Shun*; Matsuoka, Hideki*; Saika, B. K.*; Yamagami, Kohei*; Takeda, Yukiharu; Wadachi, Hiroki*; Ishizaka, Kyoko*; Iwasa, Yoshihiro*; Nakano, Masaki*
Nano Letters, 22(24), p.9964 - 9971, 2022/12
Times Cited Count:15 Percentile:84.45(Chemistry, Multidisciplinary)Yamagami, Kohei*; Fujisawa, Yuita*; Pardo-Almanza, M*; Smith, B. R. M.*; Sumida, Kazuki; Takeda, Yukiharu; Okada, Yoshinori*
Physical Review B, 106(4), p.045137_1 - 045137_8, 2022/07
Times Cited Count:2 Percentile:32.25(Materials Science, Multidisciplinary)Fujiwara, Hidenori*; Umetsu, Rie*; Kuroda, Fumiaki*; Miyawaki, Jun*; Kashiuchi, Toshiyuki*; Nishimoto, Kohei*; Nagai, Kodai*; Sekiyama, Akira*; Irizawa, Akinori*; Takeda, Yukiharu; et al.
Scientific Reports (Internet), 11(1), p.18654_1 - 18654_9, 2021/09
Times Cited Count:0 Percentile:0(Multidisciplinary Sciences)Yoshimatsu, Kohei*; Ishimaru, Junya*; Watarai, Keisuke*; Yamamoto, Kohei*; Hirata, Yasuyuki*; Wadachi, Hiroki*; Takeda, Yukiharu; Horiba, Koji*; Kumigashira, Hiroshi*; Sakata, Osami*; et al.
Physical Review B, 99(23), p.235129_1 - 235129_8, 2019/06
Times Cited Count:11 Percentile:49.16(Materials Science, Multidisciplinary)Ishigami, Keisuke*; Yoshimatsu, Kohei*; Toyota, Daisuke*; Takizawa, Masaru*; Yoshida, Teppei*; Shibata, Goro*; Harano, Takayuki*; Takahashi, Yukio*; Kadono, Toshiharu*; Verma, V. K.*; et al.
Physical Review B, 92(6), p.064402_1 - 064402_5, 2015/08
Times Cited Count:46 Percentile:84.31(Materials Science, Multidisciplinary)Shibata, Goro*; Yoshimatsu, Kohei*; Sakai, Enju*; Singh, V. R.*; Verma, V.*; Ishigami, Keisuke*; Harano, Takayuki*; Kadono, Toshiharu*; Takeda, Yukiharu; Okane, Tetsuo; et al.
Physical Review B, 89(23), p.235123_1 - 235123_5, 2014/06
Times Cited Count:23 Percentile:67.74(Materials Science, Multidisciplinary)Takeda, Kiyoko; Tejima, Kohei*; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 107, 2013/01
Tejima, Kohei*; Yokoyama, Tadashi*; Sato, Katsuya; Takeda, Kiyoko; Narumi, Issei
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 112, 2013/01
Tejima, Kohei; Sato, Katsuya; Takeda, Kiyoko; Yokoyama, Tadashi*; Narumi, Issei
Radioisotopes, 61(4), p.161 - 171, 2012/04
A biofertilizer is a substance that holds beneficial microorganisms for plant growth in a carrier material. To demonstrate the effect of -sterilization, the survival of the was monitored to assess the shelf life of biofertilizers. As biofertilizer carriers, five kinds of typical Japanese soil-based materials were used. Following the sterilization of carrier materials by -irradiation or autoclaving, was inoculated into each material. The biofertilizer was stored for 12 months at 4C or 30C. After storage, viable inoculants in the biofertilizer were enumerated. Results indicated that inoculant density after storage was greater than the initial density in biofertilizers made from sterilized carriers, whereas it decreased significantly in biofertilizers made from non-sterilized carriers. -sterilization was superior to autoclave sterilization in enhancing inoculant survival in some cases.
Takeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 110, 2012/01
Nakazato, Tomoharu*; Shimizu, Toshihiko*; Yamanoi, Kohei*; Sakai, Kohei*; Takeda, Kohei*; Nishi, Ryosuke*; Minami, Yuki*; Cadatal-Raduban, M.*; Sarukura, Nobuhiko*; Nishimura, Hiroaki*; et al.
Japanese Journal of Applied Physics, 50(12), p.122202_1 - 122202_4, 2011/12
Times Cited Count:10 Percentile:37.91(Physics, Applied)We demonstrate the potential of a hydrothermal method-grown ZnO as a high-spatial resolution imaging device for in-situ soft X-ray laser diagnostics by characterizing the exciton emission patterns. By plotting the emission pattern radii at each position, we estimated the evolution of the beam radius around the focal point. The beam profile of the Ni-like Ag ion plasma laser was estimated from the waist radii as 29 and 21m, the divergence angle as 7.2 and 11 mrad and the M2 factor as 47 and 50 in the horizontal- and vertical-axis, respectively. Spatial resolution of the magnifier was estimated to be 6m and is expected to improve by optimizing the optics of the magnifier and using a telescope. Our results would enhance the use of ZnO as an imaging device that would play a crucial role in the development and application of soft X-ray light sources.
Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 75, 2011/01
Obayashi, Hironari; Yamaguchi, Kohei*; Kon, Seiji*; Takeda, Yasushi*
Nihon Ryutai Rikigakkai Nenkai 2006 Koen Rombunshu (CD-ROM), 4 Pages, 2006/09
The velocity vector of fluid is expressed with the function of the velocity components of three directions, and the function of time. Therefore, in order to understand the flow structure, it becomes very important to measure these components. We propose the new equipment that enables three-dimensional velocity vector measurement of the flow field of the name of Vector-UVP. It consists of a central emitter, symmetrically surrounded by three receivers. If the plane transducer is used for the emitter, the ultrasonic beam will spread in the practical range, consequently measurement volume will become too large. Thus, the characteristic of the ultrasonic beam from the emitter has great influence on the performance of Vector-UVP. For the solution of this problem, and in order to simplify our equipment, we use commercial focused transducer for the emitter. We developed 2D Vecotor-UVP system. And this system successfully applied to an actual flow field for two-dimensional velocity vector measurements.
Yachi, Shigeyasu; Sato, Tadashi; Suga, Shinichi*; Komuro, Yuichi; Uchida, Masaaki; Nakajima, Kunihisa; Nakamura, Jinichi; Amezawa, Hiroo; Omura, Hideaki*; Minato, Kazuo; et al.
JAERI-Review 2003-025, 162 Pages, 2003/09
The report contains example of answers to the Problems of 31st(1999) to 35th(2003) Examinations for the Chief Engineer of Nuclear Fuel which were conducted as a national qualification examination. Brief explanations or references are given to some answers.
Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
no journal, ,
no abstracts in English
Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
no journal, ,
no abstracts in English
Yokoyama, Tadashi*; Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei
no journal, ,
no abstracts in English
Yokoyama, Tadashi*; Takeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei
no journal, ,
no abstracts in English
Takeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
no journal, ,
no abstracts in English
Tejima, Kohei; Yokoyama, Tadashi*; Sato, Katsuya; Takeda, Kiyoko; Narumi, Issei
no journal, ,
Biofertilizer is a substance that holds beneficial microorganism for plant growth (e.g. Rhizobia) in the carrier such as peat, perlite, charcoal and soil. To use biofertilizer more efficiently, it is necessary to keep the amount of viable inoculants in the biofertilizer for a definite period of time. The inoculants survival in the biofertilizer could be affected by the physical and chemical properties of carrier materials and by the competition with native microorganisms in the carrier. -irradiation is expected to sterilize the carrier materials without changes in physical and chemical properties. In an effort to demonstrate the advantage of -sterilization, the survivals of inoculants were monitored to assess the shelf life of biofertilizer.