著者

大野 宗祐 三宅 範宗 奥平 修 石橋 高 河口 優子 梯 友哉 前田 恵介 山田 学 山岸 明彦 山田 和彦 福家 英之 吉田 哲也 高橋 裕介 野中 聡 Ohno Sohsuke Miyake Norimune Okudaira Osamu Ishibashi Ko Kawaguchi Yuko Kakehashi Yuya Maeda Keisuke Yamada Manabu Yamagishi Akihiko Yamada Kazuhiko Fuke Hideyuki Yoshida Tetsuya Takahashi Yusuke Nonaka Satoshi Segawa Takahiro Ishikawa Yuko Tokoro Gensuke Yamanouchi Kazuya Matsui Takafumi

出版者

宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)

雑誌

第18回宇宙科学シンポジウム 講演集 = Proceedings of the 18th Space Science Symposium

巻号頁・発行日

2018-01

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第18回宇宙科学シンポジウム (2018年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県

著者

青木 茂樹 井上 達貴 尾崎 圭太 小坂 哲矢 柴山 恵美 鈴木 州 高橋 覚 立石 友里恵 田中 僚 田輪 周一 原 俊雄 水谷 深志 薮 美智 山田 恭平 児玉 康一 斎藤 芳隆 田村 啓輔 濱田 要 吉田 哲也 佐藤 禎宏 手塚 郁夫 伊代野 淳 山本 紗矢 石黒 勝己 大塚 直登 河原 宏晃 北川 暢子 駒谷 良輔 小松 雅宏 﨏 隆志 佐藤 修 中 竜大 長縄 直祟 中野 敏行 中村 光廣 丹羽 公雄 宮西 基明 森下 美沙希 森島 邦博 吉本 雅浩 六條 宏紀 Aoki Shigeki Ozaki Keita Kosaka Tetsuya Shibayama Emi Suzuki Atsumu Takahashi Satoru Tateishi Yurie Hara Toshio Mizutani Fukashi Yamada Kyohei Kodama Koichi Saito Yoshidata Tamura Keisuke Hamada Kaname Yoshida Tetsuya Sato Yoshihiro Tezuka Ikuo Iyono Atsushi Ishiguro Katsumi Otsuka Naoto Kawahara Hiroaki Kitagawa Nobuko Komatani Ryosuke Komatsu Masahiro Sako Takashi Sato Osamu Naka Tatsuhiro Naganawa Naotaka Nakano Toshiyuki Nakamura Mitsuhiro Niwa Kimio Miyanishi Motoaki Morishima Kunihiro Yoshimoto Masahiro Rokujo Hiroki

出版者

宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)

雑誌

大気球シンポジウム: 平成27年度 = Balloon Symposium: 2015

巻号頁・発行日

2015-11

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大気球シンポジウム 平成27年度(2015年11月5-6日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)), 相模原市, 神奈川県著者人数: 41名資料番号: SA6000044043レポート番号: isas15-sbs-043

著者

Yoshida Tetsuya Takanishi Toshimasa Nakai Seiichi YORIMOTO Akira MORIMOTO Taketoshi

出版者

Japan Society of Exercise and Sports Physiology

雑誌

Advances in exercise and sports physiology (ISSN:13403141)

巻号頁・発行日

vol.8, no.3, pp.71-76, 2002-10

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YOSHIDA, T., TAKANISHI, T., NAKAI, S., YORIMOTO, A. and MORIMOTO, T., Relationship between Dehydration, Rehydration and Decreases in Esercise Performance During Various Sports in Hot Environments. Abv. Exerc. Sports Physiol., Vol.8, No.3 pp.71-76, 2002. The purpose of this study was to analyze the effects of dehydration and rehydration on exercise performance during sports activities in summer. We repeated measurements of the step test score (STS), vertical jump (VJ), side step (SS),back strength (BS), and whoke body reaction time (RT) before and after sports activities of Judo (n=9), Tennis (n=6), American footboll (n=8), and Baseball (n=7). the subjects were allowed free access to a sports beverage during each sport activity. Body mass loss(△mb, % of initial body mass), total sweat loss (msw,tot), and rehydration level (REH, % of fluid intake to msw,tot) were slso determined, and correlations between each parameter and changes of exercise performance were assessed. The STS significantly (p<0.05) decreased while VJ, BS, SS, and RT showed no significant decrease with sports activity. In all of the subjects (n=30), the change in STS(%STS) correlated significantly with △mb(r=-0.649, p<0.001) and the RED (r=0.589, p<0.001), but not with msw,tot. However, VJ, BS, SS, and RT were not correlated with △mb, REH or msw,tot. These results suggest that a decrease of aerobic performance is found during various sports activities in hot environments, and it is related to the degree of dehydration and rehydration during sports activity.

著者

Ito Hiroshi Maeda Tetsuhiko Nakano Akihiro Hwang Chul Min Ishida Masayoshi Kato Atsushi Yoshida Tetsuya

出版者

Elsevier Ltd.

雑誌

International journal of hydrogen energy (ISSN:03603199)

巻号頁・発行日

vol.37, no.9, pp.7418-7428, 2012-05

被引用文献数

132 11

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Experimentalstudy on proton exchange membrane (PEM) electrolyzer was carried out focusing on the effect of pore structural properties of currentcollectors, such as porosity and pore diameter. Various titanium (Ti)-felt substrates with different porosities and pore diameters (measured by capillary flow porometry) were used as the anode currentcollector. Results show that when the mean pore diameter of the currentcollector was larger than 10 μm, the electrolysis performance improved with decreasing pore diameter. In contrast, changes in porosity had no significant effect on the cell performance when the porosity exceeded 0.50. The flow pattern of two-phase flow in the flow channel was discussed in terms of its relationship to bubble size and to pore diameter of the currentcollector. Finally, correlation between the calculated membrane resistance and the measured pore diameter of the currentcollectors suggest that larger bubbles generated from larger pores tend to become long bubbles in the channel, thus hindering the water supply to the membrane.