Abstract: A method includes generating, with a mobile device having a camera, images of a portion of a real space containing an object having a position. The control device tracks the position of the object based at least on the images received from the mobile device. The control device monitors the position of the object for an event conforming to a rule specified at the control device. The event is based on the rule and the position of the object in the real space. The control device, or a client device, generates an indication that the event has been detected by the control device.

Abstract: A folding hanger includes of a pair of arms and a hook. Above-mentioned pair of arms and the hook have a common axis of rotation and each arm of the arms is structured by two parallel boards and an intermediate board connecting the two parallel boards. An angle between the center line of the arm and an edge line, which passes through the common axis of rotation and an edge of the intermediate board, is set between 50 degrees and 80 degrees.