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松田 朝陽*; 高橋 悟*; 川端 邦明; 尾田 正二*; 金子 俊一*

電気学会論文誌,D, 139(4), p.424 - 432, 2019/04

In recent years, biology researchers elucidate the biological and behavioral mechanisms based on measurement of observation data. Then, it is accompanied with time cost and misrecognition to measure a trajectory of creature from observation data based on human eyes. Therefore, biology researchers require automated measurement and recording support system. In this paper, we introduce a new method of swimming trajectory generation for analyzing of medaka behavior. Then, in order to recognize medaka behavior a method which combines orientation code matching by rotation invariant multiple-templates and particle filter based on multiple-likelihood functions is introduced. Through experimentations we prove the effectiveness of our method.


Ultra-high temperature creep rupture and transient burst strength of ODS steel claddings

矢野 康英; 関尾 佳弘; 丹野 敬嗣; 加藤 章一; 井上 利彦; 岡 弘; 大塚 智史; 古川 智弘; 上羽 智之; 皆藤 威二; et al.

Journal of Nuclear Materials, 516, p.347 - 353, 2019/04

 パーセンタイル:100(Materials Science, Multidisciplinary)



Enhancement of Fe-N-C carbon catalyst activity for the oxygen reduction reaction; Effective increment of active sites by a short and repeated heating process

保田 諭; 内堀 揚介*; 分島 亮*; 日夏 幸雄*; 小河 浩晃; 矢野 雅大; 朝岡 秀人

RSC Advances (Internet), 8(66), p.37600 - 37605, 2018/11

 被引用回数:1 パーセンタイル:61(Chemistry, Multidisciplinary)



Radiocesium distribution in aggregate-size fractions of cropland and forest soils affected by the Fukushima nuclear accident

小嵐 淳; 西村 周作; 安藤 麻里子; 松永 武*; 佐藤 努*; 長尾 誠也*

Chemosphere, 205, p.147 - 155, 2018/08

 被引用回数:2 パーセンタイル:38.23(Environmental Sciences)



Measurements of neutronic characteristics of rectangular and cylindrical coupled hydrogen moderators

甲斐 哲也; 加美山 隆*; 平賀 富士夫*; 大井 元貴; 広田 克也*; 鬼柳 善明*

Journal of Nuclear Science and Technology, 55(3), p.283 - 289, 2018/03

 パーセンタイル:100(Nuclear Science & Technology)

Extensive simulation calculations were performed in the design studies of the coupled hydrogen moderator for the pulsed spallation neutron source of the Japan Proton Accelerator Research Facility (J-PARC). It was indicated that a para-hydrogen moderator had an intensity-enhanced region at the fringe part, and that pulse shapes emitted from a cylindrical para-hydrogen moderator gave higher pulse-peak intensities with narrower pulse widths than those from a rectangular one without penalizing the time-integrated intensities. To validate the peculiar distribution and advantages in pulse shapes experimentally, some measurements were performed at the neutron source of the Hokkaido University electron linear accelerator facility. It was observed that the neutron intensity was enhanced at edges of the para-hydrogen moderators, whereas it decreased at the same part of the ortho-rich-hydrogen moderator, where the dimension of those moderators was 50 mm in thickness and 120 mm in width and height. The spatial distribution and pulse shapes were also measured for a cylindrical coupled para-hydrogen moderator that has the same dimensions as for the coupled moderator employed for J-PARC. The measured results from the cylindrical moderator were consistent with the results obtained in the design studies for the moderator for J-PARC.


$$delta^{13}$$C and $$delta^{15}$$N values of sediment-trap particles in the Japan and Yamato Basins and comparison with the core-top values in the East/Japan Sea

Khim, B.-K.*; 乙坂 重嘉; Park, K.-A.*; 乗木 新一郎*

Ocean Science Journal, 53(1), p.17 - 29, 2018/03

 被引用回数:1 パーセンタイル:48.94(Marine & Freshwater Biology)



Spin resonance in the new-structure-type iron-based superconductor CaKFe$$_{4}$$As$$_{4}$$

飯田 一樹*; 石角 元志*; 永井 佑紀; 吉田 紘行*; Christianson, A. D.*; 村井 直樹; 川島 健司*; 吉田 良行*; 永崎 洋*; 伊豫 彰*

Journal of the Physical Society of Japan, 86(9), p.093703_1 - 093703_4, 2017/09

 被引用回数:14 パーセンタイル:1.1(Physics, Multidisciplinary)

The dynamical spin susceptibility in the new-structure iron-based superconductor CaKFe$$_{4}$$As$$_{4}$$ was investigated by a combination of inelastic neutron scattering (INS) measurements and random phase approximation (RPA) calculations. Powder INS measurements show that the spin resonance at Q$$_{rm res}$$ = 1.17(1) ${AA}$ vector in the tetragonal notation, evolves below Tc. The characteristic energy of the spin resonance E$$_{rm res}$$ = 12.5 meV is smaller than twice the size of the superconducting gap (2$$Delta$$). The broad energy feature of the dynamical susceptibility of the spin resonance can be explained by the RPA calculations which take into account the different superconducting gaps on the different Fermi surfaces. Our INS and PRA studies demonstrated that the superconducting pairing nature in CaKFe$$_{4}$$As$$_{4}$$ is the s$$pm$$ symmetry.


Three-dimensional visualization of methane concentration distribution in tunnels to increase underground safety

名合 牧人*; 本島 貴之*; 宮川 和也; 蟹江 俊仁*; 佐ノ木 哲*

Proceedings of ITA-AITES World Tunnel Congress 2017 (WTC 2017) (USB Flash Drive), 10 Pages, 2017/06



Evaluation of irradiation-induced point defect migration energy during neutron irradiation in modified 316 stainless steel

関尾 佳弘; 山県 一郎; 赤坂 尚昭; 坂口 紀史*

Proceedings of International Conference on Fast Reactors and Related Fuel Cycles; Next Generation Nuclear Systems for Sustainable Development (FR-17) (USB Flash Drive), 8 Pages, 2017/06



Ultra-high temperature tensile properties of ODS steel claddings under severe accident conditions

矢野 康英; 丹野 敬嗣; 岡 弘; 大塚 智史; 井上 利彦; 加藤 章一; 古川 智弘; 上羽 智之; 皆藤 威二; 鵜飼 重治*; et al.

Journal of Nuclear Materials, 487, p.229 - 237, 2017/04

 被引用回数:9 パーセンタイル:4.24(Materials Science, Multidisciplinary)



Evaluation on tolerance to failure of ODS ferritic steel claddings at the accident conditions of fast reactors

上羽 智之; 矢野 康英; 大塚 智史; 永沼 正行; 丹野 敬嗣; 岡 弘; 加藤 章一; 皆藤 威二; 鵜飼 重治*; 木村 晃彦*; et al.

Proceedings of 2017 International Congress on Advances in Nuclear Power Plants (ICAPP 2017) (CD-ROM), 7 Pages, 2017/04



Year-round variations in the fluvial transport load of particulate $$^{137}$$Cs in a forested catchment affected by the Fukushima Daiichi Nuclear Power Plant accident

松永 武; 中西 貴宏; 安藤 麻里子; 竹内 絵里奈; 武藤 琴美; 都築 克紀; 西村 周作; 小嵐 淳; 乙坂 重嘉; 佐藤 努*; et al.

Journal of Radioanalytical and Nuclear Chemistry, 310(2), p.679 - 693, 2016/11


 被引用回数:5 パーセンタイル:23.48(Chemistry, Analytical)



Root endophytic bacteria of a $$^{137}$$Cs and Mn accumulator plant, ${{it Eleutherococcus sciadophylloides}}$, increase $$^{137}$$Cs and Mn desorption in the soil

山路 恵子*; 長田 賢志*; 春間 俊克*; 大貫 敏彦; 小崎 完*; 渡辺 直子*; 難波 謙二*

Journal of Environmental Radioactivity, 153, p.112 - 119, 2016/03

 被引用回数:8 パーセンタイル:42.78(Environmental Sciences)




高橋 悟*; 奥田 泰文*; 川端 邦明; 青沼 仁志*; 佐藤 雄隆*; 岩田 健司*

Journal of Signal Processing, 20(2), p.65 - 74, 2016/03

Multiple tracking methods are widely required in biology field, in particular neuroethology and ecology field. Biology researches have to observe target behavior with recording video and have to spend much time for analyzing video data afterward. Here we focus on fighting behavior between male crickets. Fighting behavior is one of the common behaviors in animals. Animals usually fight for resources like foods, territory, mating partner and so on. During a fight, animals modify their aggressive motivation and behavior. In order to understand how they alter their motivation and behavior, we need to analyze the detail of the time sequence of the fighting. Therefore, we propose the video image processing method for automated observation, which enable us to observe and measure the behavioral characteristics of plural crickets simultaneously. Finally, through experiments we prove the effectiveness of our method.


Magnetic anisotropy and thermodynamic anomaly in the superconducting mixed state of UBe$$_{13}$$ probed by static dc magnetization measurements

清水 悠晴*; 芳賀 芳範; 柳澤 達也*; 網塚 浩*

Physical Review B, 93(2), p.024502_1 - 024502_8, 2016/01

 被引用回数:7 パーセンタイル:43.79(Materials Science, Multidisciplinary)

Static dc magnetization measurements were performed for a heavy fermion superconductor UBe$$_{13}$$ single crystal. For the fields along the [100] and [110] directions of cubic lattice, a magnetic anomaly was found at a characteristic field $$H_{rm Mag}^{*}$$ within the superconducting mixed state. It was also found that magnetic anisotropy became more significant above this field. The present study shows that the thermodynamic property of superconductivity changes as a function of magnetic field.



中村 詔司; 藤 暢輔; 木村 敦; 片渕 竜也*

核データニュース(インターネット), (112), p.7 - 19, 2015/10

2015年8月4日、東京工業大学原子炉工学研究所にて開催された「第4回ANNRI研究会」の会議内容について報告するものである。本研究会は、日本原子力研究開発研究機構原子力基礎工学研究センター, J-PRACセンター(JAEA & KEK), 東京工業大学原子炉工学研究所、及び首都大学東京との共同主催にて実施された。本研究会では、J-PRAC物質・生命科学実験施設(MLF)に設置された中性子核反応装置(ANNRI)を用いた横断的なプロジェクト課題「パルス中性子による中性子核反応研究」を推進していくために、ANNRIにおける研究の状況と得られた成果、検討課題等の情報交換を行うとともに、今後必要な取組について総合的に討議した。


Effect of minerals on accumulation of Cs by fungus ${{it Saccaromyces cerevisiae}}$

大貫 敏彦; 坂本 文徳; 山崎 信哉*; 香西 直文; 塩津 弘之; 宇都宮 聡*; 渡辺 直子*; 小崎 完*

Journal of Environmental Radioactivity, 144, p.127 - 133, 2015/06

 被引用回数:5 パーセンタイル:65.18(Environmental Sciences)



Field-orientation dependence of low-energy quasiparticle excitations in the heavy-electron superconductor UBe$$_{13}$$

清水 悠晴*; 橘高 俊一郎*; 榊原 俊郎*; 芳賀 芳範; 山本 悦嗣; 網塚 浩*; 堤 康雅*; 町田 一成*

Physical Review Letters, 114(14), p.147002_1 - 147002_6, 2015/04

 被引用回数:22 パーセンタイル:11.79(Physics, Multidisciplinary)

Low-energy excitation in the superconducting state of UBe$$_{13}$$ were studied by means of specific-heat measurements in a rotating field. Quite unexpectedly, the magnetic-field dependence of specific heat is linear in field at low fields with an isotropic field-angle dependence. The observation implies that the gap is fully open over the Fermi surfaces, in contrast to the previous expectation.


Void denuded zone formation for Fe-15Cr-15Ni steel and PNC316 stainless steel under neutron and electron irradiations

関尾 佳弘; 山下 真一郎; 坂口 紀史*; 高橋 平七郎*

Journal of Nuclear Materials, 458, p.355 - 360, 2015/03

 被引用回数:7 パーセンタイル:22.72(Materials Science, Multidisciplinary)



Response function for the measurement of (n,$$gamma$$) reactions with the ANNRI-Cluster Ge detectors at J-PARC

原 かおる; 後神 進史*; 原田 秀郎; 廣瀬 健太郎; 木村 敦; 金 政浩*; 北谷 文人; 小泉 光生; 中村 詔司; 藤 暢輔; et al.

JAEA-Conf 2014-002, p.88 - 92, 2015/02

Recently, neutron shields of a large Ge detector array at the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) in the Japan Proton Accelerator Research Complex (J-PARC) were modified to suppress the background from boron rubber sheets to enriched $$^{6}$$LiF tiles. For the new experimental set-up, efficiencies and response functions of the cluster Ge detectors with the BGO anti-coincidence detectors were measured with $$gamma$$-rays from standard sources and prompt $$gamma$$-rays from the $$^{28}$$Si(n,$$gamma$$) and $$^{35}$$Cl(n,$$gamma$$) reactions. The simulation parameters were adjusted with the EGS5 code so as to reproduce the data set of efficiencies and response functions. Based on this information, a pulse height weighting function will be deduced in the energy range of 0.1-10 MeV.

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