Statistical timing analysis methods for circuits having latches and feedback loops are described wherein the circuit yield, andor the critical cycle mean, may be iteratively calculated with high speed and accuracy, thereby allowing their ready usage in the analysis and validation of proposed circuit designs. The resonance frequency of the resonator is tunable by changing a distance between a) an outer plate and b) a ceramic disc and an end cap where the ceramic disc is located between the outer plate and the end cap. A peripheral conductive member may run around the edges of the display and housing. An electrical cable disposed within the mast connects the electrical component to the distribution component subassembly of the power distribution assembly through a breakaway connector set. Slots are created between the lip and side walls of the cavity that are sufficiently wide to receive the curved or straight upper edges of a waste container.