A method and a system is provided for Coordinate Rotation Digital Computer based matrix inversion of input digital signal streams from multiple antennas using an bi-directional ring-bus architecture. The composition is formed from particles having a mean mass aerodynamic diameter of from 1 to 250 microns, and an envelope density of from 0. The jogging platform is capable of being folded along a fixed path due to the linking of the urging frame and the pull rod. The adaptor comprises a second main body comprising a second surface, and an electrical interface disposed on the second surface.