OBJECTIVES To determine the patterns of wheelchair use in terms of locations of use, whether wheelchair use in one location was related to wheelchair use in other locations, and factors associated with wheelchair use in different locations. DESIGN Longitudinal cohort study. SETTING Patients prescribed wheelchairs by clinicians at one of two teaching hospitals (one Veterans Affairs hospital ...

voltage stability may be improved by various control functions. in this paper, it is shown that how high side voltage control (hivc) may be employed for this purpose. two test systems, namely a 22- bus and ieee u8-bus systems are used to demonstrate the proposed tuning strategy for hsvc control parameters.

Our main objective in carrying out this project was to provide the quadriplegic patient, who cannot use his arms, with means of control over his direct environment. Residual head motion was considered to be adequate, first, to control an electric wheelchair and, second, to extend that same control to an orthotic device which may include an active elbow and a prehension orthosis . The latter is ...

The development of an intelligent wheelchair (IW) platform that may be easily adapted to any commercial electric powered wheelchair and aid any person with special mobility needs is the main objective of the IntelllWheels project. To be able to achieve this main objective, three distinct control methods were implemented in the IW: manual, shared and automatic. Several algorithms were developed ...

in this paper, a robust pid control scheme is proposed for micro-electro-mechanical-systems(mems) optical switches. the proposed approach is designed in a way which solves twochallenging and important problems. the first one is successful reference tracking and the second ismitigating the system nonlinearities. the overall system composed of nonlinear mems dynamicsand the pid controller is prov...

As participation in wheelchair sports increases, the need of quantitative assessment of biomechanical performance indicators and of sports- and population-specific training protocols has become central. The present study focuses on junior wheelchair basketball and aims at (i) proposing a method to identify biomechanical performance indicators of wheelchair propulsion using an instrumented in-fi...

stability study of biological products plays an important role for determination of product changes in maintenance period and ensuring of safety and efficacy of vaccines. in this research, accelerated and long-term stability study performed for six batches of full and reduced-dose cattle iriba strain brucellosis vaccine that manufactured by razi vaccine and serum research institute as a new vac...

the repetitious nature of propelling a wheelchair has been associated with the high incidence of injury among manual wheelchair users (mwus), mainly in the shoulder, elbow and wrist. recent literature has found a link between handrim biomechanics and risk of injury to the upper extremity. the valid measurement of three‑dimensional net joint forces and torques, however, can lead to a better unde...

OBJECTIVE To determine whether hemiplegic patients can propel a leg-pedalling wheelchair and whether it is easier and faster for them to pedal the wheelchair using both legs alternately than to propel an ordinary wheelchair with their unaffected hand and leg. DESIGN Within-subject comparison. SUBJECTS Subjects comprised 10 hemiplegic in-patients (8 males, 2 females), aged 63.7 (SD 12.7) yea...

The experimental and theoretical procedures used to gather ergonomic data and derive theoretical estimates of stability, effort, and safety in use of a curb-climbing aid for standard manual wheelchairs are presented. The aid, intended for use of paraplegic persons, employs ramps which the user while seated in the chair can deploy and retrieve using attached telescoping rods. Ramps and rods may ...