Search

At KOREC, first of all, a prototype of a powered gait orthosis(PGO) has been developed to reduce the energy consumption and the muscle fatigue. Each hip joint of the PGO is flexed by an air muscle operated by pressurized air enabling the patient to walk. In this study, we compared gait characteristic of powered gait orthosis in parallel bar and walker about 3 paraplegic patients. As results, hip jont and pelvic angle is similar angle about RGO and PGO in parallel bar gait and walker gait. But gait speed and gait cycle parameter is decrease more than RGO gait. It will can improve by gait training about balance and speed.

It is well known that the damped bubble oscillation due to finite heat exchange with surrounding liquid displays an available power loss where there is entropy production. However, the nonlinear bubble analysis using a polytropic relation of the form, PVn=const (P is the pressure inside the bubble, V is the bubble volume, and n is the polytropic exponent) fails to account for such thermal damping. In this study, a self‐consistent model for the dynamics of a spherical bubble driven into oscillation in a liquid by employing the energy equation and the equation of state for a vapor inside a bubble, and the momentum and energy equations for the surrounding liquid is formulated. The heat transfer between vapor inside the bubble and the surrounding liquid is assumed to occur through the thin boundary layer adjacent to the bubble wall. The heat transfer due to an instantaneous temperature distribution inside the bubble is also considered in this analysis. The calculated frequency response curves for the forced o...