A system for locating one or more objects. In one implementation, a computer-implemented method performs a multifactor authentication of a user prior to executing a function of a programmatic interface. When the vehicle speed stabilizes, energy is stored in the supercapacitor. The method is useful for diagnosing andor therapeutically controlling celiac disease. Consequently, a wavelength converter capable of ensuring a stable high output up to watt-class is achieved. Auxiliary mode enables user to track data that can be unrelated to activity data.