A method of installing an application on a device configured with a plurality of personas is disclosed. A method of measuring thickness andor rate of thickness increase of a film comprises applying a voltage across a piezoelectric element from a first electrode to a second electrode, thereby causing the piezoelectric element to vibrate, and measuring the rate of vibration of the piezoelectric element. A plurality of transformers, including a variable autotransformer and a fixed transformer, and load resistor banks are coupled to the power source in a network organized as a plurality of selectable and switchable power paths for interfacing with an Equipment Under Test operable to be disposed in a test chamber. A valve in the pressure modulation mechanism is adjusted to control the amount of fluid utilized for pressure modulation. Also disclosed is a process for preventing slag, ash, and char buildup on a surface, comprising disposing a first surface of the composite on the surface; replacing a component comprising the surface with a component consisting of the composite; or a combination thereof. Capacitance is formed by the gate electrode and the wiring line.