The invention provides a data decoding apparatus and method by which the data rate can be discriminated at a high speed using a Viterbi decoding process. The semiconductor devices include a semiconductor substrate having first, second and third isolation layers thereon. In one non-limiting embodiment, a single phase microemulsion or other in situ-formed fluid may be created from a polar phase, a nonpolar phase, at least one viscosifier, and at least one surfactant. The engagement surface is at least one of flush with and recessed below the lower surface of the floor panel when the support surface is engaged with the lower surface. generating an empirical model of at least one of the plurality of sub-regions, 5. Also disclosed are a method for using a frequency resource, a method for manufacturing terminals and a telecommunication system.