著者
木村 仁 遠藤 真美 小関 道彦 伊能 教夫
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 C編 (ISSN:03875024)
巻号頁・発行日
vol.74, no.740, pp.806-813, 2008-04-25 (Released:2011-03-04)
参考文献数
17
被引用文献数
1 2

A phenomenon that passengers are getting sleepy is often found in running cars or trains. If a mechanism can reproduce this phenomenon, it is feasible to put insomnia patients or infants to sleep without any harmful effects. This will bring extreme benefit for insomnia patients or parents of babies. The purpose of this study is to elucidate the sleep-inducing factors of running cars or trains, and the final goal is to develop a machine which reproduces the environment to put people to sleep. For the first step of this study, we investigated the relationship between sleepiness and vibrations on several trains. The sleepability of each train is discussed by the ratio of sleeping passengers. According to the vibration analyses, the results suggest that comfortable vibration for sleep has mainly low-frequency (2 Hz) vibration with particular fluctuation. In addition, it is also guessed that low level jerks contribute the sleepability.
著者
村澤 智啓 小林 吉之 小関 道彦
出版者
バイオメカニズム学会
雑誌
バイオメカニズム学会誌 (ISSN:02850885)
巻号頁・発行日
vol.46, no.3, pp.176-184, 2022 (Released:2023-03-03)
参考文献数
29

ランニング中の大きな leg stiffnessは優れた長距離走パフォーマンスに関連づけられるが,大きな leg stiffnessに関連づけられる運動学的特徴は十分明らかにされていない.そこで本研究では, 14名の優れた長距離ランナーを含む 28名の実験参加者の,ランニングにおける運動学的変数に対し主成分分析を行い,優れた長距離ランナーの運動学的特徴を記述する主成分と leg stiffnessの間の関係を調べた.その結果,第 1主成分のみが優れた長距離ランナー群で有意に大きく( p ‹ 0.01),かつ leg stiffnessと有意に相関する( r = 0.77, p ‹ 0.01)ことが明らかになった.この主成分は,立脚期における,小さな骨盤下降変位や小さい膝関節の屈曲運動範囲など,大きな leg stiffnessに関係する HRの運動学的特徴を記述していた.
著者
木村 仁 遠藤 真美 小関 道彦 伊能 教夫
出版者
一般社団法人日本機械学会
雑誌
日本機械学會論文集. C編 (ISSN:03875024)
巻号頁・発行日
vol.74, no.740, pp.806-813, 2008-04-25
参考文献数
17

A phenomenon that passengers are getting sleepy is often found in running cars or trains. If a mechanism can reproduce this phenomenon, it is feasible to put insomnia patients or infants to sleep without any harmful effects. This will bring extreme benefit for insomnia patients or parents of babies. The purpose of this study is to elucidate the sleep-inducing factors of running cars or trains, and the final goal is to develop a machine which reproduces the environment to put people to sleep. For the first step of this study, we investigated the relationship between sleepiness and vibrations on several trains. The sleepability of each train is discussed by the ratio of sleeping passengers. According to the vibration analyses, the results suggest that comfortable vibration for sleep has mainly low-frequency (〜2 Hz) vibration with particular fluctuation. In addition, it is also guessed that low level jerks contribute the sleepability.