A method utilizes sputter transport techniques to produce arrays or layers of self-forming, self-oriented columnar structures characterized as discrete, single-crystal Group III nitride posts or columns on various substrates. Such corrosive effects are especially inhibited in the treatment of sour wells where H2S corrosion is a potential problem as well as conduits used during the treatment of subterranean formations. The detector arrangement is positionable such that a section of the detector arrangement is torque-free. Each of the at least two versions is evaluated using a plurality of operating conditions. The compounds are useful for the treatment andor prophylaxis of diseases which are associated with the modulation of CB1 receptors, including obesity. A hitch assembly is removably connected to a vehicle and includes a docking structure for removably connecting to an upper portion of the power chair to permit the drive assembly and wheels of the power chair to be raised while the chair is in a docking position.