A non-contact voltage detecting method and device are provided. The network neighbor reachability represents the reachability of another computer on the network. One or more updated physiological measures recorded subsequent to the initial observation period are periodically received. Said system also comprises a Flatness Determination Unit, said unit being arranged for calculating the flatness of the strip based exclusively on signals derived from measurement output signal values generated by said measuring devices and information about the values of the width and thickness of the strip. According to the present invention, a semiconductor device is provided which comprises a supporting substrate and a plurality of semiconductor layers provided on the supporting substrate, wherein the uppermost layer of the semiconductor layers has a surface of non-uniform roughness. The data receiving module receives data indicative of a temperature of a compressor of the heat pump system, data indicative of an ambient temperature, and data indicative of a current date and a current time.