In this paper, dynamic responses of male and female palms were investigated. Transient responses when a levitating block collided with the palms were measured. The impact force is measured using Levitation Mass Method (LMM) proposed by Fujii. Then, experimental results using LMM were reproduced by numerical simulation using FEM. In order to reproduce characteristics of palms of living bodies, they are modeled using nonlinear complex restoring force element. This nonlinear complex element is connected to the levitated block modeled with three-dimensional finite elements. The experimental data were compared with those calculated ones using FEM.

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This paper describes dynamic responses of alive human palms to receive moving objects with / without visual information. We measured transient responses when a levitating block collided with the palms. The impact force is measured using Levitation Mass Method (LMM) proposed by Fuji. Then, experimental results were simulated by numerical analysis using FEM. To reproduce behaviors of palms of living bodies, they are modeled using nonlinear complex restoring force element. This nonlinear complex element including positive / negative nonlinear hysteresis is attached to the block modeled with solid finite elements. The experimental data were compared with calculated ones.

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浮上質量法を用いて手の甲に物体が衝突した際の衝撃力を計測した.手の甲を非線形複素集中ばねとしてモデル化した.計測と同じ初速度を加えることによって高速有限要素法を用いて手の甲の衝撃応答の数値解析を行った.その結果,力を入れた場合,リラックスした場合の手の甲の衝撃応答を定性的に再現できた.

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　カドミウム(Cd)汚染土壌中のCdを植物に吸収させて除去する方法(ファイトレメディエーション法)を検討した・汚染地から採取した沖積土(0 .1M塩酸可溶性Cd:0.70mgkg^-1)と火山灰土(0.1M塩酸可溶性Cd:10.9mgkg^-1)を用い,カラシナ,アブナラ,ヒマワリ,ベニバナをポットで6週間栽培し,Cdの吸収量を調べた。土壌pHの影響も調べるため,低pH処理区も設けた。その結果,乾物収量の大きいヒマワリのCd吸収量が最も大きく,以下,ベニバナ,アブラナ,カラシナの順であった。また,いずれの植物でも低pH処理区のほうがCd吸収量が多かった。最もCd吸収量の多かったヒマワリで,沖積土中の0.1M塩酸可溶性Cdの約22%,火山灰土では約6%が吸収された。これらの結果は,低濃度のCd汚染土からのCdの除去に,ファイトレメディエーション法が有効な手段になりうる可能性のあることを示している。

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In near future, opportunities of contacts between humans and robots will increase. Therefore, it can be said that knowing mechanical properties of human bodies for safety problems becomes important. In addition, machine design for the contact is desired. Under relatively large impact load, human palms have nonlinear restoring forces, and palm may exhibit a non-linear hysteresis in the dynamic characteristics. For the palms, as the compressive deformation increase, the spring of the palm shows hardening characteristics, and hysteresis become langer. We proposed and computed using nonlinear complex restoring force element to simulate experimental impact responses of alive human palms with bio mechanical reactions.

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Department of Social Welfare in Ministry of Health and Welfare organized the Housing Corporation in 1941. Just before it, the department held a conference and made 'the designing standards for housing and its surroundings.' Until now we have considered the house types of the designing standards to be lacking relationship with family members. This study reviews the plans for designing standards in the conference, and clarifies that they were planned based on family members and uses of rooms while asleep and made to determine the designing standards.

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