A system and method for operating a mobile electronic device is disclosed. A computer-readable storage medium recording a broadcast program search program for a digital broadcasting radio receiving apparatus is also disclosed. Said electric valve is disposed in the lead so that a flow of current through the lead can be released and blocked. An O-ring seal is positioned between the rotor and the exterior surface of the housing stem. Metals, such as precious metals, that are contained within the sulfur-bearing materials advantageously may be recovered from processing products by established precious metals recovery technology.