A semiconductor device and methods for protecting a semiconductor device. The system further includes processing means for reducing the effects of scatter in images of the object reconstructed from the x-rays detected by method of estimating an amount of scatter caused only by the presence of the object corrected by an amount of scattered x-ray when presence or absence of object. The first layer has an overhanging portion extending into the opening. In accordance with the present invention, an external baffle is positioned adjacent to the open free end of the drying cylinder to prevent external air from leaking in or infiltrating the drying cylinder. A pay-out lock is operatively connected to the winding drum and constructed to act upon the winding drum in response to a sensed acceleration of the occupant, wherein the winding drum so interacts with the control mechanism and the pay-out lock as to be either securable in place by the control mechanism or acted upon by the pay-out lock, when the occupant assumes the standing position.