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21	Elliptical Rolling Link Toggle Mechanisms for Passive Force Closures with Self-Adjustment Montierth, Jacob Ross 19 July 2007 (has links) (PDF) This thesis presents elliptical rolling contact joints as an alternative to circular rolling contact and conventional revolute joints where high quality force transmission "low friction and backlash" with variable output are desired. Parameters specific to the joint and its position are developed in terms of relative link angles and elliptical surface geometry. These parameters are used to generate the basic forward kinematics for elliptical rolling link toggle mechanisms with oscillatory motion and high mechanical advantage. As large compressive loads are characteristic of such mechanisms, stress conditions are identified and principles for joint stability with variable, precision outputs are discussed. Finally, application is made to self-adjusting passive force closures with a case study of the MUSCLE Brake (Multi-toggle Self-adjusting Connecting-Linked Electromechanical) disc brake caliper. Elliptical rolling contact joints are shown to offer several benefits over circular rolling contact, including: reduced Hertz contact stresses and flexure bending stresses, variable output velocity, maximum use of contact interface by distributing small rotations across surfaces of small curvature, reduced forces on stabilizing members, increased mechanical advantage due to eccentricity, and no-slip pure rolling provided exclusively by connecting links (or flexures) without the need for gear teeth or friction. rolling link mechanisms elliptical rolling contact joints toggle linkages passive force closures self-adjustment high quality force transmission no-slip condition mechanical advantage self-locking reliability contact angles precision output electromechanical disc brake caliper Engineering Mechanical Engineering
22	健康成人集団での超音波による腹腔内脂肪厚計測と血清脂質およびレプチン測定近藤, 高明, 玉腰, 浩司, 豊嶋, 英明 03 1900 (has links) 科学研究費補助金研究種目:基盤研究(C)(2) 課題番号:11670368 研究代表者:近藤高明研究期間:1999-2000年度 LDL cholesterol LDLコレステロール caliper leptin physical activity skinfold thickness ultrasonography visceral fat waist hip ratio ウェストヒッブ比ウェストヒップ比キャリパーレプチン内蔵脂肪皮下脂肪厚肥満腹腔内脂肪超音波超音波検査身体活動

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Elliptical Rolling Link Toggle Mechanisms for Passive Force Closures with Self-Adjustment

健康成人集団での超音波による腹腔内脂肪厚計測と血清脂質およびレプチン測定