Various aspects of the invention provide various embodiments of attachment members, hooks, hanger components, mounting systems and related methods. The apparatus and method may be used to clean a semiconductor wafer surface andor grow an oxide layer on the wafer surface by oxidation. The estimated input values are used by a feedback controller in the power inverter to control the motor. When it is desired to stop filtering, the restraining mechanism is released and the filter takes a cylindrical shape. The mapping interface may assign a desirable number of read data ports and write data ports to each master to accommodate the requirements of that master. The bumper beam is connected to side brackets, which are bolted to the vehicle frame rails.