Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 75 for “"center of pressure"”.
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Generalizability of Center of Pressure Measurements Across Age Populations
The reliability of common Center of Pressure (COP) measurements was systematically investigated. Studies on the control of posture during quiet standing using force platform data lack standardization in measurement protocols (especially trial length and number). Guidelines for methodology that met …
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The Effects Of Age And Distraction On Interlimb Synchronization Of The Center Of Pressure
… distractibility. This study examines the effects of cognitive distractions on interlimb synchronization and balance in young and older adults. Participants performed quiet standing trials on separate force plates under eyes-open and eyes-closed conditions, with and without cognitive distraction …
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Classification of Human Postural and Gestural Movements Using Center of Pressure Parameters Derived From Force Platforms
… from ground reaction forces and the body's center of pressure (COP). The purpose of this research is to classify human body movements, even the subtle movements, using a carefully selected feature set. For the first time, we propose a method to classify postural and gestural movements using …
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Changes in gait speed, gastrocnemius strength, and center of pressure for individuals living with Parkinson's disease
… changes in independence, and decreased quality of life. The purpose of this study was to create two regression analyses to investigate the relationship of six factors with gait velocity and then gait endurance (the respective gait factor was included in the regression analysis). A secondary and …
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Changes in spinal posture, muscle activation, center of pressure and discomfort while standing with different footrest heights during a standardized computer task
… who are expected to stand for prolonged periods of time in the workplace to reduce the risk of developing low back pain (LBP). The purpose of this study was to examine how footrest usage, and footrests of differing heights, affect measures of posture, muscle activation, weight distribution, …
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Biomechanical Adaptations to an Implemented Ramp Angle in Recreational Alpine Skiers
… industry, but may influence skier balance and pressure control. Thus, joint coordination and center of pressure maintenance in alpine skiers (n = 19) was investigated during simulated ski squat and balance tasks with increasing binding ramp angles (0°, 1°, 2°). Greater sagittal plane center of …
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The Mechanics and Influence of the Foot-Ground Interaction During Bipedal Walking
This dissertation explores one of the most ubiquitous aspects of human daily life: the interaction of the foot with the ground while walking bipedally in our environment. Specifically, this dissertation examines the mechanics of the foot-ground interaction during walking outside of the confines of …
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Effects of deceptive behavior on biomechanical measures of standing posture
The accurate detection of deception has potential applications in many fields including credibility assessment, security screening, homeland security, and counter-terrorism. Techniques currently used for deception detection typically capitalize on deception-related physiological changes, and …
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Postural Time-To-Contact, Real-Time Visual Feedback Of Postural Activity, And Motion Sickness
The postural instability theory of motion sickness predicts that the subjective symptoms of motion sickness will be preceded by unstable control of posture. In previous research, it has been confirmed with measures of the spatial magnitude and temporal dynamic of postural activity. In the first …
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Differences in Balance and Muscle Activation Strategies during Gait Initiation at Different Speeds between Young and Middle-Aged Adults
<p>Middle-age adults’ (MA) self-report of falls are greater compared to younger adults (YA) during ambulation. A previous study found that MA compared to YA use different strategies taking one-step forward at a fast speed. No other studies have compared the effect of two different speeds on balance …
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An Investigation of the Dynamic Effects of Flap Deflection on the Aerodynamic Characteristics of an Airplane Wing Using Computational Fluid Dynamics
… maneuverability. This study shows an application of STAR-CD, a commercial computational fluid dynamics (CFD) software, to an investigation of the dynamic effects of flap deflection on the lift, drag and moment coefficients, as well as on the location of the center of pressure. For this study, a …
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Effects of Manipulating Optic Flow Gain on Dynamic Postural Control During Continuous Support Surface Translations
… postural control has been assessed through use of moveable support surfaces. Limited work utilizes VR-induced optic flow with continuous platform translations to examine balance. SS oscillations perturbed participants in the A-P direction. Kinetic and kinematic information was quantified into …
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Avaliação do Microsoft Kinect v2 como instrumento de medição das oscilações posturais
The measurement of body sway is employed in the assessment of postural control. However, many devices assigned to this function are bulky or require special preparation, such as attachment of markers. In this study, The Microsoft Kinect v2, which is a portable and markerless motion sensor, was used …
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Surrogate Models for Transonic Aerodynamics for Multidisciplinary Design Optimization
… to find two-dimensional aerodynamic properties of a chosen airfoil shape, BACJ, at a number of points over a range of thickness-to-chord ratios, free-stream Mach numbers, and lift coefficients. These points are used to generate surrogate models which can be used for the two-dimensional …
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Steady and Unsteady Maneuvering Forces and Moments on Slender Bodies
… moments have been measured at static angles of attack and sideslip and unsteady pitch ramp maneuvers at a fixed point of rotation at the quarter length of the body. The two bodies are the DARPA Suboff generic submarine shape and a non-Body-of-Revolution scalene ellipsoid with a constant …
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Effects of Yoga on Low Back Stability, Strength and Endurance
AIMS: To investigate the effects of Yoga on improving low back stability (threshold of stability, and mean total velocity of center of pressure), trunk strength (isometric strength in extension and flexion), and back endurance (isometric endurance in extension, flexion, and side laterals). METHODS: …
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Changes in Balance with Brain Inflammation: Sensitivity in Dual Motor Mechanisms
… due to potential long-term consequences of traumatic brain injuries. Evaluating balance alterations is crucial for understanding post-injury motor control strategies. This study introduces a novel approach to understanding center of pressure (COP) dynamics during quiet stance tasks for …
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Analysis of pressure data obtained at transonic speeds on a thin low-aspect-ratio cambered delta wing-body combination
… the aerodynamic loading characteristics of a thin conical cambered low-aspect-ratio delta wing in combination with a basic body and a body indented symmetrically for a Mach number of 1.2 in accordance with the supersonic area rule. The tests were conducted at Mach numbers from 0.60 to …
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An Examination of Contributing Factors to Star Excursion Balance Test in Individuals with and without Chronic Ankle Instability
Objective: The purposes of this study were to determine if differences exist in sagittal plane strength at the ankle and knee, static and dynamic postural control, ankle dorsiflexion range of motion (DFROM), and ankle laxity between individuals with and without chronic ankle instability (CAI) as …
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