Transport apparatus for use and propulsion by an individual includes a receptacle and a support board pivotally attached to the receptacle. The composition is useful in healing of refractory fracture of elderly people and diabetic or osteoporosis patients. Signals transmitted from the V polarization transmitterreceiver 2a and the H polarization transmitterreceiver 3a are received by a V polarization transmitterreceiver 2b and a H polarization transmitterreceiver 3b of a radio 10b, and output to the interface circuit 1b. By such arrangements, plural movable seats can be moved interactively by choosing the distance piece or the scissor type distance piece, thus controlling the angle of the vertical curtain blades. The system includes the affixation of an optically contrasting layer to a mail piece, the layer changing optically upon the application of a stimulus to present a contrasting background for imaging encoded information applied over the layer and related to the mail piece. It can be implemented through software, hardware, firmware or any combination thereof.