The present invention is a two-phase liquid cooling system that cools a plurality of electronic components connected in parallel. The TWS comprises a processor coupled to a transceiver, adapted to measure signal strength and sendreceive messages containing station ID and preferably altitude and position data. When switching from PWM wave voltage driving to square-wave voltage driving occurs, the voltage output of the power generator is reduced. Embodiments disclosed herein also include semiconductor constructions having transistor gates surrounding channel regions, as well as constructions in which insulative material entirely separates an upper semiconductor material from a lower semiconductor material. The object control section limits movement of the object so that the object does not move beyond a movement limiting boundary set in the movement area even when it has been determined that the object has moved beyond the movement limiting boundary based on the motion information. Multiple strobe signals can be temporarily activated in an offset or staggered arrangement to reduce the frequency of the strobe signals.