Circuits, systems, methods and software for controlling a power conversion andor correcting andor controlling a power factor in such conversion. 5, and pellet form B is provided with a polymer coating which, in the USP release test, releases less than 20% of the active ingredient at pH 6. The receiving element defines an internal bore sized to receive the shank portion of the fixation element and a seat adapted to support the head portion of the fixation element. The end cap assembly has a body with a housing affixed to one end thereof. Because of the compact size of this system, the IMU housing contains and protects the elastomeric member from potential contamination and damage, as well as eliminates the need for delicate mechanical and electrical interfaces.