نتایج جستجو برای: induced vibration

تعداد نتایج: 1025860  

Journal: :Journal of applied physiology 2006
K Krajnak R G Dong S Flavahan D Welcome N A Flavahan

The vascular symptoms of hand-arm vibration syndrome, including cold-induced vasospasm, are in part mediated by increased sensitivity of cutaneous arteries to sympathetic stimulation. The goal of the present study was to use a rat tail model to analyze the effects of vibration on vascular function and alpha-adrenoceptor (AR) responsiveness. Rats were exposed to a single period of vibration (4 h...

2013
Romesh C. Batra

1. Tummala RR (2001) Fundamentals of microsystems packaging. McGraw-Hill International Edition, New York 2. JEDEC (2002) Design standard: design requirements for outlines of solid state and related products; JEDEC Publication 95, Design Guide 4.14-1/D, Ball Grid Array Package, JEDEC Solid State Technology Association 3. Vujosevic M (2006) Warpage of flip chip packages. In: Proceedings of IMECE2...

2016
Michael A. Petrie Amy L. Kimball Colleen L. McHenry Manish Suneja Chu-Ling Yen Arpit Sharma Richard K. Shields

UNLABELLED Skeletal muscle exercise regulates several important metabolic genes in humans. We know little about the effects of environmental stress (heat) and mechanical stress (vibration) on skeletal muscle. Passive mechanical stress or systemic heat stress are often used in combination with many active exercise programs. We designed a method to deliver a vibration stress and systemic heat str...

اعظم, کمال , بهشتی, محمد حسین , علی محمدی, ایرج , نصیری, پروین ,

Introduction: The power tiller is a multipurpose hand tractor designed primarily for rotary tilling and other farm operations. Vibration, transmitted from the handles of the tiller to the operators’ body, causes many injuries such as, pain, musculoskeletal disorders and white finger syndrome. The aim of this study was to evaluate the hand-arm vibration exposure in the operators of tiller model...

Journal: :Brain : a journal of neurology 1997
C Rickards F W Cody

The effects upon the trajectories of practised slow (approximately 9 degrees/s) voluntary wrist-extension movements of applying vibration to the tendon of an antagonist muscle (flexor carpi radialis) during the course of the movement have been studied in patients with idiopathic Parkinson's disease and age-matched healthy individuals. In both patient and control groups, flexor vibration elicite...

2007
Masatsugu Otsuki Takashi Kubota Tatsuaki Okada Yasuharu Kunii

This study presents a synthesis scheme on a target history for the simultaneous control of position and vibration of a space robotic manipulator with a flexible arm. As an essential problem in the manipulator with a flexible arm, its vibration is easily induced by self-motion and external disturbance. Therefore, in this study, the authors develop the long, lightweight and forceful manipulator f...

2015
Liang Ge Pan Hu Ze Hu Qing Yang Zhengyin Wang Junbi Liao

Drilling engineering is a high input and risk underground project, which needs the real-time down-hole diagnosis and forecast technique. Drilling string vibration signals contain full and complex vibration waves, which contains the vibration of the drilling string by itself, the vibration stimulated by the interaction of bit and the formation, the vibration induced by colliding between drill st...

Journal: :Industrial health 2005
Yukio Takahashi Kazuo Kanada Yoshiharu Yonekawa Noriaki Harada

Human body surface vibrations induced by high-level low-frequency pure tones were measured at the chest and the abdomen. At the same time, the subject rated the unpleasantness that he had just perceived during the exposure to low-frequency noise stimulus. Examining the relationship between the measured vibration and the rating score of the unpleasantness revealed that the unpleasantness was in ...

2014
Gian Felice Giaccu Bernardo Barbiellini

Crossties and cable networks are used on cable-stayed bridges to mitigate wind-induced stay vibration. A nonlinear free-vibration analysis of a cable network with random oscillation amplitudes is presented in this study. Specifically, a nonlinear restoring-force spring model is introduced at the crosstie to simulate in-plane network free vibration at large amplitudes. The current constitutive m...

2012
Siawoosh Mohammadi Zoltan Nagy Chloe Hutton Oliver Josephs Nikolaus Weiskopf

Diffusion tensor imaging is widely used in research and clinical applications, but still suffers from substantial artifacts. Here, we focus on vibrations induced by strong diffusion gradients in diffusion tensor imaging, causing an echo shift in k-space and consequential signal-loss. We refined the model of vibration-induced echo shifts, showing that asymmetric k-space coverage in widely used P...

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