John Standeven

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PURPOSE To compare accelerational forces to the head in high school-level football, hockey, and soccer athletes. METHODS Acceleration of impact was measured within the helmet of high school hockey and football players during actual game play. A triaxial accelerometer was placed at the vertex of the helmet immediately adjacent to the players head. Peak(More)
PURPOSE Cognitive deficits observed in professional soccer players may be related to heading of a soccer ball. To assess the severity of a single instance of heading a soccer ball, this study experimentally and theoretically evaluated the linear and angular accelerations experienced by the human head during a frontal heading maneuver. METHODS(More)
UNLABELLED There is increasing concern that repetitive blows to the head, such as those from heading a soccer ball, can cause measurable cognitive impairment. Reducing acceleration of impact could reduce neurologic sequelae. OBJECTIVE To measure the effectiveness of four different types of soccer headgear in reducing the acceleration of impact. METHODS(More)
BACKGROUND AND PURPOSE Stroke is the leading cause of long term disability in the United States, and for many it causes loss of gait function. The purpose of this research is to examine stroke survivors' gait adaptations to training on the Powered Ankle Foot Orthosis (PAFO). Of particular interest is the stroke survivors' ability to learn how to store and(More)
— With over 600 thousand people each year surviving a stroke, it has become the leading cause of serious long-term disability in the United States [1], [2]. The adverse financial and social conditions attributed to stroke have prompted researchers and entrepreneurs to explore the viability of rehabilitation robots. The Powered Ankle Foot Orthosis (PAFO)(More)
This paper describes the RaFT simulation environment, a software tool for use in the development of hardware-based fault-tolerant systems using transputers. The concepts behind the RaFT project are presented, together with an overview of previous work into the design of a fault-tolerant transputer node. The simulation environment described seeks to emulate(More)
This paper introduces the concept of process evacuation, a technique for moving processes between processing elements in the presence of faults. The technique forms part of the RaFT support environment, a framework for building fault-tolerant applications on transputers. The paper describes the layered structure of the support environment and how process(More)
Movement therapy is one type of upper extremity intervention for children with cerebral palsy (CP) to improve function. It requires high-intensity, repetitive and task-specific training. Tedium and lack of motivation are substantial barriers to completing the training. An approach to overcome these barriers is to couple the movement therapy with videogames.(More)