Abstract: The subject disclosure is directed towards a technology in which a mobile device service plays background audio as instructed by a third party audio player application. The service continues to play background audio after the audio player application is deactivated from the foreground, e.g., as another application becomes the foreground application. Also described is launching agents to obtain additional information and/or to handle custom audio formats, and handling of user requests from a universal (system) volume control or the audio player application (when in the foreground).

Abstract: A vibration and shock resistant finned tube counter-flow heat exchanger crising a rigid support member wound about the inner wall of the heat exchanger shell at the same pitch as the finned tube windings, and a radial bumper support, affixed to the unsupported end of the heat exchanger shell and providing a radial space between the concentric shells of the heat exchanger and an anterior insulating shell.