In one embodiment, a hands-free user interface device includes a first plate, a second plate spaced from the first plate, a sensor associated with the plates adapted to detect when the first plate pivots relative to the second plate, and a controller adapted to receive signals from the sensor and output control signals to another component based upon the received signals. A fully-automated, live, reverse-auction based system is integrated into an SNP to enable buyers to initiate desired transactions and take advantage of a subscribers’ network of friends, colleagues, co-workers, family members and connections by connecting buyers and sellers in a non-intrusive, targeted fashion. A sheet-surface portion determination-based offset section subtracts the values of the offset signals from the image data of an inspection object. The method may further include forming a semiconductor layer adjacent the superlattice and comprising at least one first region therein including a first conductivity type dopant. The first thermally sprayed coating portion is disposed on the first wall section. A method for implementing the pre-designed state models is also provided including implementing the runtime code in conjunction with the state table.