Abstract: A system for real-time monitoring of movement of a person on a mattress includes sensor devices positioned on one or more peripheral surfaces of the mattress and configured to sense lateral accelerations of the peripheral surface(s). The sensor devices includes at least first and second sensor devices positioned on a first side surface of the mattress. A processing subsystem is configured to receive signals indicative of the sensed lateral accelerations of the peripheral surface(s) from the sensor devices, determine whether the sensed lateral accelerations correspond to one or more alert conditions, and selectively cause, or not cause, one or more visual and/or audio indicators to be generated based on whether at least the sensed lateral accelerations correspond to the alert condition(s).

Abstract: A self-stabilizing integrally-molded pillar filling structure for underground mines is provided, belonging to the field of supporting structures, which includes an airbag, and the airbag is provided with a feed filling port and a gas inflation port; a telescopic bearing piece, and the telescopic bearing piece is fixedly provided on an inner surface of the airbag and is capable of expanding and contracting with volume change of an inner cavity of the airbag; and steel hoops, and the steel hoops are fixedly provided on an outer surface of the airbag.