An aqueous coating composition having improved adhesion to friable surfaces is provided. A plurality of templates is provided and updated using a plurality of qualified beats. The bladeless, closed and tapered tip is adapted to penetrate tissue. After the information signal is fed back through a feedback path to the non-inverting input terminal of the operational amplifier, that signal is amplified and the amplified information signal is binarized by a binarizing circuit, thereby data transmitted from the interrogator is demodulated. For example, the device can be used as a torchiere or wall sconce.