Abstract: Disclosed is a system comprising an illumination component, an electrical apparatus, a cable configured to be mechanically connected to the illumination component, a winch configured to wind and/or unwind the cable, and a connector device comprising a bearing and configured to mechanically connect the illumination component to the cable in such a manner that, in a connected state, at least part of the illumination component is rotationally decoupled from the cable via the bearing. The system is configured to supply power and/or data to the illumination component via the cable.

Abstract: Disclosed is a system comprising an illumination component, an electrical apparatus, a cable configured to be mechanically connected to the illumination component, a winch configured to wind and/or unwind the cable, and a connector device comprising a bearing and configured to mechanically connect the illumination component to the cable in such a manner that, in a connected state, at least part of the illumination component is rotationally decoupled from the cable via the bearing. The system is configured to supply power and/or data to the illumination component via the cable.

Abstract: A method for configuring a wireless network or a central station of a wireless network including at least the central station and at least two peripheral stations, includes in a first task, the central station ascertaining the peripheral stations which are reachable by wireless signals of the central station. In a second task, the central station configures at least one of the peripheral stations, which were ascertained in the first task, test-wise as a repeater, which receives and re-transmits the wireless signals of the central station. If the central station ascertains that more peripheral stations are reachable by the central station via the repeater, in a third task, the central station configures the peripheral stations, configured test-wise as repeaters, permanently as repeaters.

Abstract: A sound absorber for a flow of gas which is subjected to a noise, including a pipe section which is substantially straight along an axis, is bounded by two openings which are situated one behind the other with respect to the axis and which has a guide body which is fitted into the pipe section approximately on the axis and is held by at least one spoke. A projection of the guide body parallel to the axis on a surface which contains the openings covers this opening substantially completely, and gas can flow around the guide body and an inner surface which faces said guide body substantially without turbulence in the flow.