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Ambulatory Center of Mass Prediction Using Body Accelerations and Center of Foot Pressure
IEEE Transactions on Biomedical Engineering, 2008The center of body mass (COM), center of foot pressure (COP), and body segment acceleration signals are commonly used to indicate movement performance and stability during standing activities and walking. For balance maintenance and restoration, the human brain is capable of estimating and predicting the COM even in the absence of visual or vestibular ...
Aimee L, Betker +2 more
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Performance of Low Pressure Center Pivot Systems
Transactions of the ASAE, 1984ABSTRACT A computer simulation model was used to compare the effect of sprinkler spacing and terrain on the theoretical performance of six center pivots. Systems with impact sprinklers and low pressure fixed head spray sprinklers had the highest uniformities for constant spacings of 12 and 1.5 m, respectively.
null L. G. James, null S. K. Blair
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Pressure dependence of F-center hyperfine interactions
Journal of Physics and Chemistry of Solids, 1972Abstract We report a study of the effects of intense hydrostatic stress (10 Kbar) on the ENDOR spectra of F -centers in several alkali halides. In LiF, KCl, and KBr, the first shell contact hyperfine interaction constant, a I , increases with compression, while the second shell term, a II , decreases.
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Biomechanical relationship between center of gravity and center of pressure during standing
IEEE Transactions on Rehabilitation Engineering, 1994The relationship between the position of a body's center of gravity (CG) as determined by a whole body kinematic model and that given by 3 CG position estimation techniques using the ground reaction force center of pressure (CP) has been investigated in this study. The CG and CP are related by the Newtonian mechanics equations of motion.
B.J. Benda, P.O. Riley, D.E. Krebs
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Instability Prediction by Monitoring Center of Pressure During Standing
2006 International Conference of the IEEE Engineering in Medicine and Biology Society, 2006Incorporating an instability predictor into a portable sensor has a number of clinically relevant applications. This study investigated the feasibility of developing a real-time assessment tool to predict stepping during standing by monitoring Center of Pressure (COP) measurements.
Xavier, Tortolero +3 more
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Microcantilevers Bend to the Pressure of Clustered Redox Centers
Langmuir, 2014The redox-activated deflection of microcantilevers has attracted interest for nanoactuation and chemical sensing. Microcantilever sensors are devices that transduce (bio)chemical reactions into a quantifiable nanomechanical motion via surface stress changes. Despite promising applications in analytical science, poor signal-to-noise ratios and a limited
Eric R, Dionne +2 more
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On the center of pressure of a body
Fluid Dynamics, 1983It is shown that under conditions of local interaction of a flow with the surface of a body the position of the center of pressure does not depend on the angle of attack or the form of the model of the flow past the body for a large class of configurations including conical, cylindrical, spherical, and flat elements. The problem of finding the shape of
Bunimovich, A. I., Dubinskij, A. V.
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Detection of Gait Instability Using the Center of Mass and Center of Pressure Inclination Angles
Archives of Physical Medicine and Rehabilitation, 2006To define a parameter that quantifies balance control during gait and better identifies elderly people who are at a higher risk of falling.Controlled study.University research laboratory.Twelve elderly patients (mean age, 76.9+/-6y) with complaints of imbalance during walking, or with a history of falls, and 12 matched healthy elderly adults.Not ...
Heng-Ju, Lee, Li-Shan, Chou
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Dynamical structure of center of pressure fluctuations in elderly people
Gait & Posture, 2009This study investigates whether aging has an influence on the dynamics of the fluctuations of the displacement of the center of pressure (COP), during quiet standing. Two groups of healthy subjects were compared (11 young and 12 elderly) for two visual feedback conditions (eyes open and eyes closed).
Benoît, Seigle +2 more
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