BACKGROUND Since 2010, an increasing interest in more portable and flexible hardware for balance and posture assessment led to previously published studies determining whether or not the Wii Balance Board could be used to assess balance and posture, both scientifically and clinically. However, no previous studies aimed at comparing results from different Wii Balance Boards for clinical balance ...

This paper describes a method by which the Kerr [1] mathematical model of a reciprocating compressor having rigid valve plates may be adapted to investigate the dynamic response of flexible valves of certain geometries. The method is restricted to flexible valves which can be modelled by spring-mass systems. Also, the section of the valve plate which is directly over the valve port must remain ...

BACKGROUND The aim of the present study was to verify concurrent validity of the Gyko inertial sensor system for the assessment of vertical jump height. METHODS Nineteen female sub-elite youth soccer players (mean age: 14.7 ± 0.6 years) performed three trials of countermovement (CMJ) and squat jumps (SJ), respectively. Maximal vertical jump height was simultaneously quantified with the Gyko s...

BACKGROUND Inertial measurement unit (IMU) sensor-based techniques are becoming more popular in horses as a tool for objective locomotor assessment. OBJECTIVES To describe, evaluate and validate a method of stride detection and quantification at walk and trot using distal limb mounted IMU sensors. STUDY DESIGN Prospective validation study comparing IMU sensors and motion capture with force ...

Measuring sow weight distribution is vital for scientists to identify lame animals before clinical signs can be visually observed and help livestock producers decrease lameness incidence in their swine breeding herd. In this study, an embedded microcomputer-based force plate system was developed to measure vertical forces produced by each limb of the sow and evaluate data accuracy to the sow's ...

OBJECTIVES To explore the correlation between clinical assessment and force plate measurement of postural control after stroke when selected balance tasks are performed under similar spatial and temporal conditions, and to examine the inter-rater agreement of assessment of weight distribution during quiet stance in subjects with stroke. DESIGN A descriptive and correlational study. METHODS ...

The aims of this study were to compare the validity of two accelerometers with a force plate and to determine the influence of the sensor’s point of attachment on the assessment of squat jump performances. Nine male subjects performed a number of squat jumps (n = 38) on a force plate, either with a Myotest or Mensense system attached to their hips and backs. For evaluation purposes, twoway ANOV...

We study the Casimir piston for massless scalar fields obeying Dirichlet boundary conditions in a three dimensional cavity with sides of arbitrary lengths a, b and c where a is the plate separation. We obtain an exact expression for the Casimir force on the piston valid for any values of the three lengths. As in the electromagnetic case with perfect conductor conditions, we find that the Casimi...

We consider detailed roughness and conductivity corrections to the Casimir force in the recent Casimir force measurement employing an atomic force microscope. The roughness of the test bodies — a metal plate and a sphere — was investigated with the AFM and the SEM respectively. It consists of separate crystals of different heights and a stochastic background. The amplitude of roughness relative...