Proposal of air compressing device using walking vibration energy regeneration for pneumatic driven assistive device

Pneumatically driven wearable assistive devices for walking have been developed recently. These devices can achieve flexible assistance without control; however, they require large and heavy air compressors for activation. In this study, a pneumatically driven source using vibration energy regeneration from walking was developed. The aim was to activate the cylinder using vibrations due to walking and compressed air. A mass element, which is connected to a human body via a spring and a cylinder, vibrates along with the human gait cycle. Next, a prototype was developed and tested. In walking experiments, stored pressure was measured at several gait cycles and masses for comparison. Results indicate that the gait cycle period and masses affect the stored pressure; the highest pressure recorded was 0.08 MPa

Topological Effect on Polymer Crystallization of Linear and Ring Polymers(Knots and soft-matter physics: Topology of polymers and related topics in physics, mathematics and biology)

この論文は国立情報学研究所の電子図書館事業により電子化されました。テトラヒドロフランの開環重合によりポリテトロヒドロフランを作成し、この高分子の希薄溶液において同一分子鎖の末端同士を反応させることにより環状高分子を作成した。合成した環状高分子および直鎖状高分子の分子量は約5,000でその分子量分布は1.14であった。両高分子を融体から広い温度範囲で等温結晶化させた。結晶化速度の温度依存性は両高分子とも釣鐘型の曲線を示し、明瞭な極大結晶化速度(G_)が得られた。環状高分子のG_値は直鎖状高分子のG_の約40近くまで減少した。環状高分子の速度が遅くなる理由として多くの原因が考えられるが、主に環状分子のトポロジカルな立体構造に原因すると考えられる。また、球晶構造にも大きな違いが見出された。環状高分子は同心円状の球晶が観察されるが、直鎖状高分子は一般に観察される負の球晶が得られた。環状高分子ではトポロジカルな影響から高分子鎖の折りたたみ方向が上下のラメラ面で異なり、この違いがラメラの捩れを発現させ、球晶のパターンが同心円状になったと考えられる。Cyclic poly (tetrahydrofuran)s (Mn of ca. 5,000) were been prepared through the metathesis polymer cyclization of a telechelic precursor having allyl groups in the presence of a Grubbs catalyst, and the subsequent hydrogenation of the linking in the presence of an Adams' catalyst (PtO_2). A remarkable topology effect was subsequently been observed upon the isothermal crystallization of the model polymer, showing distinctive spherulite growths rate and spherulite morphologies in comparison with the relevant linear poly (tetrahydrofuran) counterpart. The maximum growth rate of the ring polymer reduced about 40% against the linear polymer. The reduction of the growth rate in the ring polymer might be ascribed either to the conformational entropy in the molten state, to the adsorption mechanism on the crystal growth front in the secondary nucleation process, to the chain folding surface energy, or topological effect of the molecular arrangement from the melt on the crystal surface. The spherulite of the linear polymer showed a negative birefringence, as normally observed in polymer spherulites. On the contrary, the ring polymer showed a negative spherulite with a banded structure with a concentric ring

Proposal of air compressing device using walking vibration energy regeneration for pneumatic driven assistive device

Pneumatically driven wearable assistive devices for walking have been developed recently. These devices can achieve flexible assistance without control; however, they require large and heavy air compressors for activation. In this study, a pneumatically driven source using vibration energy regeneration from walking was developed. The aim was to activate the cylinder using vibrations due to walking and compressed air. A mass element, which is connected to a human body via a spring and a cylinder, vibrates along with the human gait cycle. Next, a prototype was developed and tested. In walking experiments, stored pressure was measured at several gait cycles and masses for comparison. Results indicate that the gait cycle period and masses affect the stored pressure; the highest pressure recorded was 0.08 MPa

Calcium/Calmodulin-mediated Action of Calcitonin on Lipid Metabolism in Rats

The effects of calcitonin on lipid metabolism were investigated in three kinds of rats, one strain of rabbits, and a primary culture of rat hepatocytes. In a short-term experiment, calcitonin decreased serum cholesterol and triglycerides after injection in rats on either an ordinary or high-fat diet. In a longterm experiment, calcitonin decreased the serum cholesterol and triglycerides in uremic rats, hypothalamic obese rats, and Watanabe-heritable hyperlipidemic rabbits. In cultured hepatocytes, calcitonin reduced the incorporation of [14Cjacetate into cholesterol and triglycerides in a dose-dependent way. Treatment with W7, a calmodulin inhibitor, overcame the decrease caused by calcitonin in serum lipids in rats and in the synthesis of triglycerides from acetate or palmitate in the hepatocytes, but did not alter the intracellular cAMP level or incorporation of [2PIPi into PI in the cells. The results suggest that calcitonin lowers serum lipid levels and lipogenesis in hepatocytes in a calcium/calmodulin-dependent way

Robust and Automatic Calibration of a Projection See-Through Integral Imaging Display using Homography Based Mirror Identification

info:eu-repo/semantics/publishe

Homography based identification for automatic and robust calibration of projection integral imaging displays

Recent advances in the creation of microlens arrays as holographic optical elements allow the creation of projector-based see-through light field displays suitable for augmented reality. These systems require an accurate calibration of the projector with relation to the microlens array, as any small misalignment causes the 3D reconstruction to fail. The methods reported so far require precise placement of the calibration camera w.r.t. the lens array screen, which affects the display configuration. We propose a calibration approach which is more robust, and which allows free camera placement. Hence, it does not limit the capabilities of the system. Both a homography-based technique and structured light play a central role in realizing such a method. The method was tested on a projection-based integral imaging display system consisting of a consumer-grade projector and a digitally designed holographic optical element based micromirror array screen. The calibration method compensates for the lens distortion, intrinsics, and positioning of the projector with relation to the screen. The method uses a single camera and does not require the use of obtrusive markers as reference. We give an in-depth explanation of the different steps of the algorithm, and verify the calibration using both a simulated and a real-world setup.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

The International Linear Collider: Report to Snowmass 2021

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. Its experiments will challenge the Standard Model of particle physics and will provide a new window to look beyond it. This document brings the story of the ILC up to date, emphasizing its strong physics motivation, its readiness for construction, and the opportunity it presents to the US and the global particle physics community