In a radiation imaging apparatus having a radiation generator, an imaging unit including a detecting unit for detecting radiation to generate a radiation image data, a carriage for carrying the radiation generator, and an operating unit for providing an interface to a user, it is decided whether the radiation imaging apparatus is in a moving state or not. The electrical terminal is resilient and movable in directions towards and away from a body part of the screening device, and the resilience of the electrical terminal is configured so that retaining of the coupling member on the bracket member may, at least in part, be fulfilled by the resilience of the resilient electrical terminal. The frame pivots on the outer side of the glazing for quick loading and unloading of the glazing and the protective sheet on the outside of the glazing, and the frame also pivots closed to seal the glazing and protective sheets securely within the window protector assembly. Tags may be attached to passive assets to provide location identification information to network devices. The method comprising receiving a plurality of wheel identifiers at the wireless receiver and selecting one of the plurality of wheel identifiers that corresponds to the first wheel based on the number of times that the selected one of the plurality of wheel identifiers is received at the wireless receiver.