An electrical stimulation method and an electrical clinical apparatus using a variant assignment method applied in treatment of dysfunction such as urinary incontinence is disclosed. A sensor is positioned in the sealed environment. The tunable pulsed source is operable to provide an output signal having an average power. An apparatus for language subset validation includes at least one memory having program instructions and at least one processor configured to use the program instructions to validate multiple program modules that together form a program. A plurality of layers is applied over the activated substrate surface layer.