2 edition of Instability detector for quiet standing. found in the catalog.
Instability detector for quiet standing.
Xavier Tortolero Baena
Published
2005
.
Written in
Incorporating a measure of stability into a portable sensor has a number of clinically relevant applications. This study investigated the feasibility of developing a real-time assessment tool to monitor balance during quiet standing. Forward and backward perturbations were performed on 16 able-bodied subjects using a pulley system attached to the subjects" waist. A linear relationship was found between the maximum centre of pressure (COP) velocity and the maximum COP position caused by the perturbations. As the maximum COP velocity occurs considerably before the maximum COP position, this model serves as an instability predictor. A sensor that measures COP velocity can use the model to predict a maximum COP position and compare it with an instability threshold. Results show that the proposed model is a viable solution to quantitatively measure stability in real-time.
| The Physical Object | |
|---|---|
| Pagination | 83 leaves. |
| Number of Pages | 83 |
| ID Numbers | |
| Open Library | OL19214555M |
| ISBN 10 | 0494021438 |
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A quietstanding index is developed for tracking the postural sway of healthy and diabetic adults over a range of ages. Several postural sway features are combined into a single composite feature C that increases with age features are ranked based on the r 2-values of their linear regression models, and the composite feature is a weighted sum of selected sway features with optimal Cited by: A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.
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The predicted growth rate of the KBI instability is on the order of O(1/10) of the ion magnetic drift frequency which depends on Instability detector for quiet standing. book azimuthal mode number, and plasma temper. Additionally, in the case of a quiet stance, interference of individual signal systems is implemented, including for instance closed eyes, or standing on unstable foam surface (Kim et al., ).
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Figure 1: Kelvin{Helmholtz instability: Initial perturbed state Using (3) equation (4) can be written as h t + u h x = vh at y = h(x;t) (5) where vh is the vertical component of uid velocity at the interface.
Equation (5) is the kinematic boundary condition which states that the interface moves up and down with a velocityFile Size: KB. Klein-Gordon-Hartree equation standing waves strong instability The first author is supported by the Key Project of Chinese Ministry of Education (Grant No.
) and Sichuan Province Science Foundation for Youths (Grant No. JQ); the second author is supported by National Natural Science Foundation of China (Grant No. )Cited by: 1.
A soft dielectric membrane is prone to snap-through instability. We present theory and experiment to show that the instability can be harnessed to achieve giant voltage-triggered deformation. We mount a membrane on a chamber of a suitable volume, pressurize the membrane into a Cited by: Boundary control, quiet boundaries, super-stability and super-instability Firdaus E.
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The original object, called the progenitor, either. The proposed instability detection algorithm will be implemented in a sensor system using insole sheets in shoes with minitur- ized pressure sensors by which the COPv can be continuously measured.
The sensor system will be integrated in a closed-loop feedback system with a neuroprosthesis for standing.
5 Multipoint analysis of compressive fluctuations in the fast and slow solar wind O.W. Roberts,1 X. Li,2, Y. Narita3., C.P. Escoubet1 H. Laakso1,4File Size: KB. Kelvin-Helmholtz Instability Author: Aleksandar Vujinovic Supervisor: Dr.
Jo ze Rakovec Kranj, May 4, Abstract Kelvin-Helmholtz instability (KHI) is an instability at the interface between two parallel streams with di erent velocities and densities, with the heavier File Size: KB.growth time of the KH instability is on the order of 14 minutes.
3. Kelvin-Helmholtz instability The KH instability in fluids arises when the fluids exhibit velocity discontinuity over an interface between fluids in relative motion.
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