A double-gate semiconductor device includes a MOS gate and a junction gate, in which the bias of the junction gate is a function of the gate voltage of the MOS gate. In the file downloading mechanism, it is possible to resume downloading of the file from the point at which the download was stopped in the previous data transfer session even though the data transfer link is broken during the downloading of the file due to unexpected network problems or other problems. The planar surfaces are referenced to a coordinate system of the master model through a series of points. The method may further comprise minimizing a change in the rate of change in the oscillating frequency based on the switching of the varactors. Furthermore, the location verification platform may determine a correction-offset to the current geo-location based, at least in part, on an accuracy threshold.