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Murase, Kiyoka*; Kataoka, Ryuho*; Nishiyama, Takanori*; Nishimura, Koji*; Hashimoto, Taishi*; Tanaka, Yoshimasa*; Kadokura, Akira*; Tomikawa, Yoshihiro*; Tsutsumi, Masaki*; Ogawa, Yasunobu*; et al.
Journal of Space Weather and Space Climate (Internet), 12, p.18_1 - 18_16, 2022/06
Times Cited Count：1 Percentile：20.65(Astronomy & Astrophysics)We identified two energetic electron precipitation (EEP) events during the growth phase of moderate substorms and estimated the mesospheric ionization rate for an EEP event for which the most comprehensive dataset from ground-based and space-born instruments was available. The mesospheric ionization signature reached below 70 km altitude and continued for ~15 min until the substorm onset, as observed by the PANSY radar and imaging riometer at Syowa Station in the Antarctic region. We also used energetic electron flux observed by the Arase and POES 15 satellites as the input for the air-shower simulation code PHITS to quantitatively estimate the mesospheric ionization rate. Combining the cutting-edge observations and simulations, we shed new light on the space weather impact of the EEP events during geomagnetically quiet times, which is important to understand the possible link between the space environment and climate.
Kusano, Kanya*; Ichimoto, Kiyoshi*; Ishii, Mamoru*; Miyoshi, Yoshizumi*; Yoden, Shigeo*; Akiyoshi, Hideharu*; Asai, Ayumi*; Ebihara, Yusuke*; Fujiwara, Hitoshi*; Goto, Tadanori*; et al.
Earth, Planets and Space (Internet), 73(1), p.159_1 - 159_29, 2021/12
Times Cited Count：6 Percentile：49.29(Geosciences, Multidisciplinary)The PSTEP is a nationwide research collaboration in Japan and was conducted from April 2015 to March 2020, supported by a Grant-in-Aid for Scientific Research on Innovative Areas from the Ministry of Education, Culture, Sports, Science and Technology of Japan. It has made a significant progress in space weather research and operational forecasts, publishing over 500 refereed journal papers and organizing four international symposiums, various workshops and seminars, and summer school for graduate students at Rikubetsu in 2017. This paper is a summary report of the PSTEP and describes the major research achievements it produced.
Saito, Shinzo; Okamoto, Koji*; Kataoka, Isao*; Sugiyama, Kenichiro*; Muramatsu, Ken*; Ichimiya, Masakazu*; Kondo, Satoru; Yonomoto, Taisuke
Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 10 Pages, 2015/05
Ishimori, Kenichiro*; Watanabe, Masayuki; Kimura, Takaumi; Yaita, Tsuyoshi; Yamada, Takashi*; Kataoka, Yumiko*; Shinoda, Satoshi*; Tsukube, Hiroshi*
Chemistry Letters, 34(8), p.1112 - 1113, 2005/08
Times Cited Count：13 Percentile：44.74(Chemistry, Multidisciplinary)Stereochemical substitution on tripod ligand significantly offered efficient separation of trivalent actinides from trivalent lanthanides. Liquid-liquid extraction using chiral tris(2-pyridylmethyl)amine ligands as an extractant exhibited high efficiency and selectivity for trivalent actinides. A combination of chiral ligand and 2-bromodecanoic acid further enhanced extraction performance for trivalent actinides.
Fusaeda, Shigeki*; Yanagisawa, Ichiro*; Kataoka, Shinichi*; Shimada, Takashi*; *; *; *
PNC TJ1216 98-007, 46 Pages, 1998/02
None
Fusaeda, Shigeki*; Yanagisawa, Ichiro*; Kataoka, Shinichi*; Shimada, Takashi*; *; *; *
PNC TJ1216 98-006, 673 Pages, 1998/02
None
Kataoka, Shinichi*; Kitao, Hideo*; Tachikawa, Hirokazu*; Shimada, Takashi*; Maeda, Kazuto*; Nemoto, Kazuaki*; Yanagisawa, Ichiro*
PNC TJ1216 98-002, 676 Pages, 1998/02
None
*; Fusaeda, Shigeki*; Kataoka, Shinichi*; Nemoto, Kazuhiko*; Yanagisawa, Ichiro*; Fukui, Hiroshi*; Doi, Motoo*
PNC TJ1216 97-007, 77 Pages, 1997/03
None
*; *; Kataoka, Shinichi*; Nemoto, Kazuhiko*; Yanagisawa, Ichiro*; Fukui, Hiroshi*; Doi, Motoo*
PNC TJ1216 97-006, 202 Pages, 1997/03
None
Nariai, Hideki*; Sugiyama, Kenichiro*; Kataoka, Isao*; Mishima, Kaichiro*; *; Monde, Masanori*; Sugimoto, Jun; ; Hidaka, Akihide; *; et al.
Nihon Genshiryoku Gakkai-Shi, 39(9), p.739 - 752, 1997/00
Times Cited Count：1 Percentile：10.53(Nuclear Science & Technology)no abstracts in English
*; *; *; *; *; *
PNC TN942 85-01, 64 Pages, 1985/03
In the case of fast breeder reactors, the in-service inspection of the reactor vessel must be conducted under such severe conditions as relatively high temperature, high radiation dose, and narrow space. Therefore, the heat- and radiation- resistant sensors are required, which also should be compact and flexible for remote handling and installing. Authors reviewed the state of the fiber scopes for the visual in-service examination, and discussed some problems about applicability to FBR conditions. This report presents the technical information obtained from the survey conducted in 1983, and the brief draft of the development plan including some remained problems about application to FBR.
Watanabe, Masayuki; Ishimori, Kenichiro; Wada, Atsushi*; Kataoka, Yumiko*; Murata, Masaki*; Shinoda, Satoshi*; Nishihara, Hiroshi*; Tsukube, Hiroshi*; Kimura, Takaumi
no journal, ,
Soft-donor extractants containing sulfur- or nitrogen-donor are applicable to the separation of trivalent actinides (An(III)) from lanthanides (Ln(III)) by solvent extraction method. We designed two ligand systems which are expected to efficiently separate An(III) from Ln(III). The one is "Oligo-pyridine" ligand containing multiple pyridine moieties. The other is "Chirality-controlled" ligand containing chiral centers in the ligand. We synthesized more than thirty ligands and found out the ability on the separation of An(III) from Ln(III). In this presentation, we will discuss about the comprehensive results on the separation ability of An(III) from Ln(III) by means of "Oligo-pyridine" and "Chirality-controlled" ligands, and the extraction equilibrium of An(III) with selected tripodal ligands in detail.
Hamada, Nobuyuki*; Hara, Takamitsu*; Funayama, Tomoo; Sakashita, Tetsuya; Kataoka, Keiko*; Sora, Sakura; Suzuki, Michiyo; Fukamoto, Kana; Yokota, Yuichiro; Omura, Motoko*; et al.
no journal, ,
no abstracts in English
Sora, Sakura; Hamada, Nobuyuki*; Hara, Takamitsu*; Funayama, Tomoo; Sakashita, Tetsuya; Kataoka, Keiko*; Suzuki, Michiyo; Fukamoto, Kana; Yokota, Yuichiro; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Kobayashi, Yasuhiko; Funayama, Tomoo; Sakashita, Tetsuya; Furusawa, Yoshiya*; Shao, C.*; Hamada, Nobuyuki*; Wada, Seiichi*; Yokota, Yuichiro; Kakizaki, Takehiko*; Fukamoto, Kana; et al.
no journal, ,
-ray irradiation on the basal slowing response in 
Suzuki, Michiyo; Sakashita, Tetsuya; Funayama, Tomoo; Fukamoto, Kana; Hamada, Nobuyuki*; Yokota, Yuichiro; Kataoka, Keiko*; Sora, Sakura; Tsuji, Toshio*; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Hamada, Nobuyuki*; Hara, Takamitsu*; Funayama, Tomoo; Sakashita, Tetsuya; Kataoka, Keiko*; Sora, Sakura; Suzuki, Michiyo; Fukamoto, Kana; Yokota, Yuichiro; Omura, Motoko*; et al.
no journal, ,
no abstracts in English
Hamada, Nobuyuki*; Hara, Takamitsu*; Kataoka, Keiko*; Sora, Sakura*; Omura, Motoko*; Funayama, Tomoo; Sakashita, Tetsuya; Yokota, Yuichiro; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Hamada, Nobuyuki*; Hara, Takamitsu*; Kataoka, Keiko*; Sora, Sakura*; Funayama, Tomoo; Sakashita, Tetsuya; Yokota, Yuichiro; Omura, Motoko*; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
