Abstract: An apparatus as provided for measuring acceleration of a person's head or other object. The apparatus comprises a sensor for sensing acceleration and a controller for controlling recording of data resulting from the sensed acceleration due to an explosive force. The controller is adapted to determine whether or not to enable recording of the data based on the sensed acceleration. A data receiver is provided to receive the sensed acceleration data from the sensing means, and requires electrical power to enable data to be received thereby. The controller controls electrical power to the receiver so that if the sensed acceleration reaches or exceeds a predetermined value, electrical power to the data receiver is enabled. The recorded acceleration data may be used for injury analysis.

Abstract: A method of calibrating a data recording unit for measuring head acceleration, including the steps of providing a data recording unit mounted to a head protector, mounting the head protector on a support, subjecting the head protector and support to a force or pressure, measuring acceleration of the head protector resulting from the force or pressure, measuring acceleration of the support resulting from the force or pressure, and determining a relationship between the measured acceleration of the head protector and of the support.

Abstract: An apparatus for recording data indicative of acceleration of a part of a person's body or other object, including first memory means for receiving acceleration data from an acceleration sensor, second memory means operatively coupled to the first memory means for receiving data from the first memory means, and a data transfer controller for controlling the transfer of data from the first memory means to the second memory means based on the acceleration data.

Abstract: An apparatus as provided for measuring acceleration of a person's head or other object. The apparatus comprises a sensor for sensing acceleration and a controller for controlling recording of data resulting from the sensed acceleration due to an explosive force. The controller is adapted to determine whether or not to enable recording of the data based on the sensed acceleration. A data receiver is provided to receive the sensed acceleration data from the sensing means, and requires electrical power to enable data to be received thereby. The controller controls electrical power to the receiver so that if the sensed acceleration reaches or exceeds a predetermined value, electrical power to the data receiver is enabled. The recorded acceleration data may be used for injury analysis.

Abstract: Vision training eyewear include lenses having a plurality of obscuration zones. The obscuration zones are individually switchable to provide light emission or attenuation that can interfere with normal vision of the wearer. A pattern or sequence of patterns can be selectively activated at a fixed or variable rate while a trainee is exposed to a test situation.

Abstract: Vision training eyewear include lenses having a plurality of obscuration zones. The obscuration zones are individually switchable to provide light emission or attenuation that can interfere with normal vision of the wearer. A pattern or sequence of patterns can be selectively activated at a fixed or variable rate while a trainee is exposed to a test situation.

Abstract: A drawing apparatus and an associated method that allows selective heating of a substrate when a colorant, such as a crayon, is applied to the substrate. The heated substrate at least partially liquefies the colorant. The colorant is then absorbed into the substrate to create a translucent image on the substrate. When the colorant is removed from the substrate, the substrate correspondingly disengages from a heat source and the image formed on the substrate cools and hardens.