A method and apparatus for locating a remote unit is provided herein. The light transmissionreflection component includes a light entrance section, a light transmissionreflection section, and a light emission section. The driver includes an application program interface which is coupled with one or more personality modules, one for each scanner device. The assay results are used to diagnose the presence of chronic immune disease activity andor characterize chronic immune disease activity in the subject, e. In addition, the electronic device may include a gate electrode that is in proximity to the nanotubes and not in electrical contact with the nanotubes.