The present disclosure describes systems and techniques relating to generating three dimensional models from range sensor data. In one embodiment, the bipolar transistor includes a base, a collector, a plurality of emitter sections coupled to a common emitter and a ballast emitter for each emitter section. The compositions and methods of the invention are useful in transferring nucleotide sequences of interest into a cell, including, but not limited to, in gene therapy applications. During trimming of the internal voltage, the first trimming circuit trims an externally supplied first target voltage in accordance with first trimming data. In this manner, the process of communicating information from a wireless communication device is accomplished in one communication system rather than two. Virtual private network configuration can be accomplished with merely local intervention by preprovisioning extra channel identifiers at each customer edge device and by advertising label base and range information corresponding to a list of channel identifiers.