A diode is described with a III-N material structure, an electrically conductive channel in the III-N material structure, two terminals, wherein a first terminal is an anode adjacent to the III-N material structure and a second terminal is a cathode in ohmic contact with the electrically conductive channel, and a dielectric layer over at least a portion of the anode. This eliminates any external input terminal for inputting such fixed-logic signal. An estimated actual peak of the compression is then determined in a similar fashion. The rotor plate attachment to the bearing system is done in parallel to the rim attachment and is preventing loosening up.