Methods of detecting a plug insertion into a plug aperture of a communications connector are provided in which a control signal is received that is electromagnetically coupled across a plug aperture of the communications connector using a reactive coupling element. The control system determines an axle torque, and longitudinal forces at each tire in response to the axle torque. Zaleplon is the active ingredient of the soporific licensed under the trade name Sonata\xae. The electronic device is adapted to compare newly acquired signatures to the substantially unique signature, and to recognize at least one difference from the substantially unique signature. The compositions comprise choline, or a salt or hydroxide thereof; niacin, or a salt, amide or ester thereof; folic acid, or a salt thereof; methionine or a salt or ester thereof; and glycine or a salt, ester or methylated form thereof.