著者

菊地 謙次 寺田 信幸 望月 修

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.46, no.2, pp.232-237, 2008-04-10 (Released:2008-10-06)

参考文献数

4

被引用文献数

1

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Many researches and developments have tried to realize a μTAS in several fields, but it has not been realized yet because of a scale effect in the course of miniaturization. It is difficult to make an enough volume of flow in a micro tube. This is a bottleneck of realizing the μTAS. We have tried to apply a unique mechanism of insects to the μTAS devises. In this paper, we focused on a blood-sucking mechanism of a mosquito that can obtain blood at the rate of approximately 1.0 μl/min. To understand the structure of their pumps, we made a mosquito into many slices, and anatomized under a microscope; we also let mosquitoes feed on human blood on a glass plate. We found the following results: 1) a manner of blood sucking, 2) a power density of the pump system by an analysis of flowing red blood cells at a tip of proboscis of mosquito. We have succeeded to reveal the blood-sucking mechanism of the mosquitoes, which can be applied to micro fluid devices.

著者

寺田 信幸 山田 博之 吉田 善一

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.43, no.4, pp.785-789, 2005 (Released:2007-01-19)

参考文献数

5

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Many studies have been carried out in order to understand the real effects of space environment on the human body. Our aim is to create a very small, energy-saving vital signs monitoring device capable of facilitating simple and precise blood tests in an orbiting vehicle where harsh technical conditions experienced. The device also has the potential to be used portable and ubiquitous diagnostics systems for medical care at home or bedside. In this study, we developed a micro-fluid device using laser-processing and resin-lamination methods. A number of heat-hardening resin films are layered on a soda glass. A laser is used to fabricate part of the channel on each film for every lamination. The channels are 45 μm in depth and 50-150 μm in width. The components we have currently produced were : 1) a trident channel structure ; 2) a solid-body flow channel with a micro-pipe, both of which were designed to make blood cells flow in a single line in the channel for cell counting ; and 3) a micro-flow channel simulating a capillary vessel for measuring blood coagulation, platelet aggregation, and transformation of red blood cells. We have successfully observed blood cells flowing in these micro-fluid devices.

著者

嶋宮 民安 北間 敏弘 長田 誠 相部 洋一 小松原 修 野副 晋 篠原 正典 碓氷 章 寺田 信幸 毛利 元彦 Shimamiya Tamiyasu Kitama Toshihiro Osada Makoto Aibe Yoichi Komatsubara Osamu Nozoe Susumu Shinohara Masanori Usui Akira Terada Nobuyuki Mori Motohiko

出版者

宇宙航空研究開発機構宇宙科学研究本部

雑誌

宇宙利用シンポジウム 第24回 平成19年度 = Space Utilization Research: Proceedings of the Twenty-fourth Space Utilization Symposium

巻号頁・発行日

pp.351-352, 2008-03

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Living in space must entail life in a cramped confined space, as well as monotonous sounds, smells, food and scenery. There are still few studies on human health in long-term closed habitation. We have investigated changes in the psycho-physiological status of humans in a series of closed habitations with re-circulated air, water and waste products. In this report, we describe a closed habitation experiment conducted at the Institute for Environmental Sciences and the outcomes obtained through discussion in our working group.

著者

藤澤 政紀 岩瀬 直樹 寺田 信幸

出版者

明海大学

雑誌

基盤研究(C)

巻号頁・発行日

2008

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視覚刺激と重心動揺に対する姿勢制御との間におけるフィードバックループの研究がなされている.しかし,咬筋の収縮が姿勢制御におよぼす影響についてはあまり知られていない.本研究では,重心動揺に影響を与える3D動画を用い,軽度の咬みしめと下顎安静位という下顎位の違いが重心動揺に及ぼす影響について検討した.被験者は顎関節症のない5名の男性とし,左右の咬筋,前脛骨筋,腓腹筋に電極を貼付し,バーチャル空間内の重心動揺計に立たせた.そして,被験者には軽度の咬みしめとして,最大咬合力の10%MVCを維持する練習をさせた.下顎安静位は上下の歯の無接触状態を指示した,その後ジェットコースターの3D動画を80秒間観賞させ,明らかに姿勢が変化した時間帯の筋電図と重心動揺のデータを分析対象区間とした.その結果,右側の腓腹筋以外は筋電値は下顎安静位よりも軽度の咬みしめ時の方が有意に高く,下顎安静位よりも軽度の咬みしめ時の方が,重心動揺は有意に安定することが確認できた.以上により,上下の歯の接触は姿勢の安定化に影響を与えると考えられた.

著者

秋元 俊成 寺田 信幸 松元 明弘

出版者

社団法人日本生体医工学会

雑誌

生体医工学 : 日本エム・イー学会誌 (ISSN:1347443X)

巻号頁・発行日

vol.46, no.1, pp.58-63, 2008-02-10

被引用文献数

1

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We're developing walking robot with the object of bringing the walking of robot close to that of human utilizing pendular motion of legs. First, human gait analysis has been conducted in the study. In particular, we measured joint angle variation and myoelectric signal at a normal walking pace, focusing on the ankle mobility. From the result of the measurement, we realized that ankle mobility of supporting leg not only provides energy in the direction of travel by kicking back but also leads idling leg to swing forward. Then, we conducted modeling of ankle-driven walking and reproduced the motion using highly simplified model. As the result, walking driven only by ankle was realized in simulation. Therefore, it is expected that the system could not only be used for walking robot but also be applied to walking aids or artificial legs, because it reproduces a walking utilizing pendular motion of legs effectively due to the hip of free joint, and it is possible to reduce the number of actuators.