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The effect of the 1/6 G environment on the atmospheric\nsuspension was evaluated by means of the cutoff value of an elutriator; the cutoff value in the 1/6 G\nshould be 6 times larger than at the earth’s surface. The results of our experiment confirmed that\nthe falling velocity of SPM in a 1/6G approximates Stokes’ law, and the falling time is inversely\nproportional to the force of gravity. Numerical computation suggested that residual SPM in a\nconvection-free room becomes high in a low-gravity environment or in a high-ceilinged room. These\nresults suggest that once lunar dust intruded into a lunar base, it would take a considerably long\ntime to clean up. Since the suspension time of SPM is different according to the particle size, the\nexposure risk of SPM will also vary according to the particle size. 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Effect of 1/6 Gravity Environment on Atmospheric Suspension of Simulated Lunar Regolith
https://jaxa.repo.nii.ac.jp/records/22582
https://jaxa.repo.nii.ac.jp/records/22582fe3915cf-8d5f-403a-86b2-86b9d738f772
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2015-09-14 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Effect of 1/6 Gravity Environment on Atmospheric Suspension of Simulated Lunar Regolith | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | SPM | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | elutriator | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Stokes' law | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | regolith | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | dust proof | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Maki, Syou
× Maki, Syou× Honma, Yoshiyuki× Tsuchiya, Hidetoshi× Tanaka, Kazunari× Aoki, Shigeru× Takeoka, Hajime× Miki, Takeo× Ohshima, Hiroshi× Yamamoto, Masafumi× Morimoto, Yasuo× Ogawa, Yasutaka× Mukai, Chiaki |
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著者所属(英) | ||||||
en | ||||||
National Institute of Occupational Safety and Health, Japan | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
University of Occupational and Environmental Health, Japan | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Occupational Safety and Health, Japan | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency (JAXA) | ||||||
出版者 | ||||||
出版者 | バイオメディカル・ファジィ・システム学会 | |||||
出版者(英) | ||||||
出版者 | Biomedical Fuzzy Systems Association | |||||
書誌情報 |
en : Biomedical Soft Computing and Human Sciences 巻 20, 号 1, p. 7-19, 発行日 2015-07 |
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関係URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.bmfsa.org/jpn/index.php?action=pages_view_main&page_id=36 | |||||
関連名称 | http://www.bmfsa.org/jpn/index.php?action=pages_view_main&page_id=36 | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | In order to investigate the behavior of suspended particle matter (SPM) in a 1/6 gravity (1/6 G) environment, simulated lunar regolith was diffused in a chamber, realizing a quasi 1/6 gravity environment by parabolic flight. The effect of the 1/6 G environment on the atmospheric suspension was evaluated by means of the cutoff value of an elutriator; the cutoff value in the 1/6 G should be 6 times larger than at the earth’s surface. The results of our experiment confirmed that the falling velocity of SPM in a 1/6G approximates Stokes’ law, and the falling time is inversely proportional to the force of gravity. Numerical computation suggested that residual SPM in a convection-free room becomes high in a low-gravity environment or in a high-ceilinged room. These results suggest that once lunar dust intruded into a lunar base, it would take a considerably long time to clean up. Since the suspension time of SPM is different according to the particle size, the exposure risk of SPM will also vary according to the particle size. Considering that the risk depends only on the drifting time, the actual influence of low gravity on fine particles (Dp ???? 1.0 mm in diameter) and on large particles (Dp > 10 mm) in a 1/6G would be negligible. In contrast, for medium sized particles (2.5 < Dp ???? 10 mm) the difference in the drifting time between that on the earth and on the lunar surface is much larger than can be confirmed with the senses. Safety precautions used for this size of particle on the earth should be altered on the lunar surface. |
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内容記述(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Accepted: 2015-03-09 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11509989 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://dx.doi.org/10.24466/ijbschs.20.1_7 | |||||
関連名称 | info:doi/10.24466/ijbschs.20.1_7 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: PA1510090000 |