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Detecting Postural Instability in Parkinson’s Disease From IMU-Based Objective Measures

open access: yesIEEE Transactions on Neural Systems and Rehabilitation Engineering
Parkinson’s Disease (PD) is a progressive neurological disorder that affects both motor and non-motor functions. A critical aspect of PD is postural instability, which is associated with a higher risk of falls and a significant decline in mobility.
Kendal Smith   +7 more
doaj   +1 more source

Acoustomechanics of semicrystalline polymers

open access: yesTheoretical and Applied Mechanics Letters, 2016
We develop an acoustomechanical theory for semicrystalline polymers and demonstrate that acoustic radiation force is capable of causing giant deformation in these materials.
Fengxian Xin, Tianjian Lu
doaj   +1 more source

Pull-in behavior analysis of vibrating functionally graded micro-cantilevers under suddenly DC voltage

open access: yesJournal of Applied and Computational Mechanics, 2015
The present research attempts to explain dynamic pull-in instability of functionally graded micro-cantilevers actuated by step DC voltage while the fringing-field effect is taken into account in the vibrational equation of motion.
Jamal Zare
doaj   +1 more source

Precision Balance Assessment in Parkinson’s Disease: Utilizing Vision-Based 3D Pose Tracking for Pull Test Analysis

open access: yesSensors
Postural instability is a common complication in advanced Parkinson’s disease (PD) associated with recurrent falls and fall-related injuries. The test of retropulsion, consisting of a rapid balance perturbation by a pull in the backward direction, is ...
Nina Ellrich   +9 more
doaj   +1 more source

The Pull Test: A Dynamic Test to Confirm Hip Microinstability

open access: yesArthroscopy, Sports Medicine, and Rehabilitation, 2019
Purpose: To define a distraction distance (pull length) cut-off that would differentiate those patients with hip microinstability and those without the disorder, called the Pull-Out Test.
Kostas J. Economopoulos, M.D.   +5 more
doaj   +1 more source

Temperature Sensitivity of Silicon Cantilevers with the Pull-in Instability Method

open access: yesProcedia Chemistry, 2009
AbstractIn this paper the temperature effects on [110] Silicon cantilevers is analyzed and measured in the range of 25 -100 °C. The quasi-static electrostatic pull-in instability method developed recently for ultra-thin cantilevers [“Characterizing Size-dependent Effective Elastic Modulus of Silicon Nanocantilevers Using Electrostatic Pull-in ...
Sadeghian, Hamed   +5 more
openaire   +1 more source

Dynamic pull-in instability of geometrically nonlinear actuated micro-beams based on the modified couple stress theory

open access: yesLatin American Journal of Solids and Structures
This paper investigates the dynamic pull-in instability of vibrating micro-beams undergoing large deflection under electrosatically actuation. The governing equation of motion is derived based on the modified couple stress theory.
Hamid M. Sedighi   +2 more
doaj   +1 more source

Stability, Nonlinearity and Reliability of Electrostatically Actuated MEMS Devices

open access: yesSensors, 2007
Electrostatic micro-electro-mechanical system (MEMS) is a special branch with a wide range of applications in sensing and actuating devices in MEMS. This paper provides a survey and analysis of the electrostatic force of importance in MEMS, its physical ...
Di Chen, Guang Meng, Wen-Ming Zhang
doaj   +1 more source

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