In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The display may be applied directly to the core, or to a thin, flexible secondary sheet applied in turn to the core. Computing a set of parameters representing a predetermined data processing function, using a redundancy in the set of parameters to incorporate the data string into a bit representation of the set of parameters. The attachment system is additionally intended to universally mate to a corresponding engagement device for securing of a wheelchair in position. The method includes receiving a message via the messaging service, evaluating the message received relative to a message profile stored on the smart card, and disposing of the message received based on the evaluation of the message received relative to the message profile stored on the removable smart card. The heat exchanger further comprising sheet material that separates the first set from the second set, and provides for the transfer of heat between said first set and said second set of passages.