A distributed code development environment includes baseline code that is logically divided into a plurality of labels, each including a plurality of transactions authored by respective developers. Methods for increasing the power rating, power density andor power conversion efficiency of a sinewave-modulated pulse-width-modulated inverter having a either half-bridge or full-bridge topology, including minimizing uncoupled inductances and loop inductances in the primary winding by employing either ribbon-like conductors having a high crossectional aspect ratio or litz-wire. The refractive index of the film varies according to heat excitation, and the film comprises crystal grains of an oxide and amorphous portions present between the crystal grains.