A method and apparatus for operating a UE and a BS to perform contention-based scheduling of downlink signal transmissions are disclosed. Configurations of injection and production wells facilitate the in situ combustion. An isotope in the sample is identified using nuclear resonance fluorescence, and the spatial distribution thereof is imaged. A wire harness, including a park detection switch, electrically connects the BTSI to an automotive electrical system. With the action of the press member 100, it becomes possible to prevent the peripheries of the wafers W from being worn and also possible to elongate the span of life of the holding members 95, 96, 97, 98, 99 while performing a chemical processing.