Abstract: A base unit of a sports swing mechanics training device receives from a swing detector a swing detection message indicating a swing motion by a player, and in response, displays a visual symbol for a predetermined period of time. When the device receives a user selection of a visual symbol from the player, it is compared with the displayed visual symbol. If they match, the device indicates a symbol match. Otherwise, the device indicates a symbol mismatch. The base unit is placed at a location where the displayed visual symbol would be visible to the player immediately following contact with a ball when the player's eyes are in a desired position during the swing motion. The device trains players to keep their heads and eyes correctly directed at the point of collision with the ball during and immediately following the ball collision.

Abstract: A base unit of a sports swing mechanics training device receives from a swing detector a swing detection message indicating a swing motion by a player, and in response, displays a visual symbol for a predetermined period of time. When the device receives a user selection of a visual symbol from the player, it is compared with the displayed visual symbol. If they match, the device indicates a symbol match. Otherwise, the device indicates a symbol mismatch. The base unit is placed at a location where the displayed visual symbol would be visible to the player immediately following contact with a ball when the player's eyes are in a desired position during the swing motion. The device trains players to keep their heads and eyes correctly directed at the point of collision with the ball during and immediately following the ball collision.

Abstract: A feedback control loop around a gain element controls the output signal of said gain element responsive to an input or reference signal, and is additionally responsive to a non-linear feedback signal. The feedback loop of this invention comprises computation means for exponentiating a signal representing the output of the gain element to generate said non-linear feedback signal. The control loop of invention provides exceptional transient response when used for driving reactive loads.

Abstract: A power-conversion regulator comprising an inductive reactor, an output filter reactor, and a switch for admitting energy to the inductive reactor, additionally comprises computation circuitry responsive to the flux in the inductive reactor, to a reference signal, to an output voltage, and sometimes to an output load current, for computing the quantity of energy that must be supplied to a load and to the output filter reactor to regulate the output voltage or current to a desired relationship with the reference signal during each chopping waveform cycle driving the switch. As the inductive reactor is charged from an input energy source, the computation circuitry predicts whether the energy in the inductive reactor has become adequate for the regulation.

Abstract: An accelerometer senses equine respiratory structural vibrations. The accelerometer includes a sensing surface configured to be attached to one of hair, skin, bone, ligament, cartilage, and other tissue of a horse. The accelerometer is responsive to respiratory structural vibrations of the horse and outputs a signal corresponding to the respiratory structural vibrations.