Abstract: A door barricade apparatus includes a blade with a barb at a distal end and a tang at a proximal end. The barb is configured to be disposed within an aperture of a strike plate. A body has a top and a bottom, and the body is operably coupled to the tang of the blade. A paddle is moveably coupled to the body and is configured to selectively move between a first orientation substantially flush with the top of the body and a second orientation protruding from the top of the body. A handle is coupled to the bottom of the body and is configured to keep a user's fingers away from a door jamb. An actuator is in cooperation with the paddle, and is configured to selectively position the paddle between the first orientation and the second orientation.

Abstract: An ultra-wideband (UWB) tracking device, system, and method are provided. The system can include a plurality of anchor transmitters, at least one location device, and a processing system. The anchor transmitters can be arranged in predetermined positions, include a unique identifier, and each transmit an ultra-wide band (UWB) signal including the unique identifier. The location device can receive the UWB signals, and transmit the unique identifiers. The processing system can include a digital map that stores the unique identifiers and the predetermined positions. The processing system can receive the unique identifiers from the location device, and identify a position of the location device based on a comparison of the unique identifiers received and the stored unique identifiers on the digital map.