A conditional read and invalidate operation for use in coherent multiprocessor systems is disclosed. The method generally includes adding comonomer chemical precursors to a solution of styrene and nonionic surfactant. The temperature-condition judgment section makes a judgment on a temperature condition of the electrical storage device based on a temperature detected by an electrical-storage-device temperature detection section. The controller may be configured to track a travel path of the front frame based on the first and second signals, and to regulate operation of the articulation actuator to cause the rear frame to follow the travel path of the front frame. In this context, the same game can be played differently each time it is played. The receiver uses noise-based prescaling of multiple receiver chain signals for optimally combining the receiver chain signals in a composite equalized signal and uses noise-based time-varying postscaling the equalized signal.