objectives: altered movement strategy and postural control has been observed in low back pain (lbp) patients. objective of this study was to determine postural response following support surface translation, also correlations between postural response related measures and disability caused by lbp. methods: 20 healthy subjects and 20 patients with recurrent non specific lbp participated in this ...

Swing options are the main type of volumetric contracts in commodity markets. A swing contract gives the holder the right (but not the obligation) to adjust volume of received commodity at her discretion. Unlike paper assets, trading in physical commodities often takes place over time and therefore involves volume as a second key state variable. Often consumption rates of the commodity are unpr...

This study analyzed the biomechanical and physiological effects of the arm swing in roller ski skating, and compared leg-skating (i.e. ski skating without poles) using a pronounced arm swing (SWING) with leg-skating using locked arms (LOCKED). Sixteen elite male cross-country skiers performed submaximal stages at 10, 15 and 20kmh(-1) on a 2% inclined treadmill in the two techniques. SWING demon...

Swing is a musical performance technique, whose magnitude is indicated by the swing ratio. This study examines the effects of swing on music-listening appreciation. In Experiment 1, 21 participants were presented with synthesized performances with three swing ratios, and were asked to rate their impressions using the semantic differential method. The results show that there exists a certain rel...

OBJECTIVE To investigate the immediate biomechanical effects after transition to a new microprocessor-controlled prosthetic knee joint. DESIGN Intervention cross-over study with repeated measures. Only prosthetic knee joints were changed. SETTING Motion analysis laboratory. PARTICIPANTS Men (N=11; mean age ± SD, 36.7±10.2y; Medicare functional classification level, 3-4) with unilateral tr...

In this study, a new servo control system is presented for the overhead crane based on discrete-time state feedback approach. It provides both robust tracking and load swing suppression. Inspired from independent joint and computed torque control in robot manipulator field, a new model is derived in which the crane actuators are considered as the main plant. The crane nonlinearities are then tr...

The process of matching clubs with appropriate shafts to individual players is largely one of trial and error. Bending stiffness or shaft flex, mass, damping, torsional stiffness, and bend point are widely accepted as being the five main shaft properties that affect performance in golf. Considerable debate surrounds the individual and combined dynamic influence of these factors during the golf ...

There are over 72 million people in the US are obese (BMI>30). Falls have been identified as the most common cause of injuries in the obese, and obese elderly fell almost twice as frequently as their lean counterparts per year. Falls among older adults often occur during walking, and gait dysfunction is included among the many risk factors for falls. As such, this study evaluated gait functions...

Measurements are presented of the speed at which six different rods could be swung by four male students. Three of the rods had the same mass but their swing-weight (i.e. moment of inertia) differed by large factors. The other three rods had the same swing-weight but different masses. Our primary objective was to quantify the effects of mass and swing-weight on swing speed. The result has a dir...