A reclining device of two-point hinged type including a reclining plate element having one end connected via first lock mechanism with lower hinge point about which the reclining plate element is inclined and another end connected via second lock mechanism with upper hinge point about which a seat back is foldable forwardly. Solder bumps are selectively applied in a solder bump integrated circuit packaging process so that portions of a circuit can be effectively disabled. The antenna assembly further including a separate conductive member having an approximate \xbc wavelength or greater dimension, which may be defined as the internal printed wiring board ground plane of the communications device. In a further variation, a modulo arithmetic operation can be employed for a periodic non-linear function. This is made possible by a first motor which is associated with the inverted pendulum and turns it as a function of its angular deviation from the neutral position measured by a first position sensor associated with the inverted pendulum.