A method and device for the non-intrusive determination of the electrical power consumed by a subscriber installation. The CPU determines the moving position of the workpiece, the tool, and the drilling tool according to the command from each channel machining sequence storage portion, and outputs the determined position as a command signal in response to the pulse signal generated at the pulse signal generating circuit. The first surface includes a concave surface and a projecting surface which projects towards the second surface, wherein a length between the concave surface and the second surface is longer than a length between the projecting surface and the second surface. In some embodiments, ultrasound or other imaging technologies can be used to locate a joint or other targeted anatomical location. The hair is then separated along the trace with the parting device to created a hair style with a part patterned substantially similar the patterned edge of the stencil device used. The present invention relates to methods and systems for changing the optical properties of tunable resists that can be used in the production of electronic devices such as integrated circuits.