A law is designed for simultaneous control of the orientation of an Earth-pointing spacecraft, the energy stored by counter-rotating flywheels, and the angular momentum of the flywheels and control moment gyroscopes used together as an integrated set of actuators for attitude control. General , nonlinear equations of motion are presented in vector-dyadic form, and used to obtain approximate exp...

OBJECTIVE To compare the effects of open and closed kinetic chain exercise on shoulder joint reposition sense. DESIGN AND SETTING Subjects with no previous upper extremity injury participated in a 6-week exercise program consisting of 3 sessions per week. SUBJECTS Thirty-nine healthy male military cadets: 13 each in the open, closed, and control groups. MEASUREMENTS Each subject was prete...