A method that globally allocates resources of a communication system. The active-matrix element may be positioned behind the interferometric modulator with respect to incident light. At least one conveyor can move food product from the inlet to the outlet. The variable length strut extends from the bracing member to rearward part of seat member and controls pivotal movement of seat member around support beam. The first and second conductive coupling arms extend away from the center of the cylindrical structure to form a microstrip line. The galley chiller may operate on DC power and may be transported from one cart to another to provide chilled air to a particular cart.