Abstract: A method of deicing an airfoil is provided. In preferred embodiments, the method comprises coupling a plurality of piezo-electric transducers (PETs) to an inside surface of an airfoil. The PETs are electrically coupled to a DC-DC converter and a first inverter. The PETs are driven by sweeping the driving frequency of the plurality of PETs over a frequency range that spans at least 10 kHz and 100 kHz. In preferred embodiments, some PETs are driven at a phase shift to the other PETs.

Abstract: A concrete form panel system for the pouring of structural concrete panels having integrated furring strips for receiving fasteners includes a form panel body having top and bottom surfaces, opposing first and second ends, and opposing first and second sides. A longitudinally extending beam channel is formed through the top surface of the body from the first end to the second end and parallel to the first and second sides for housing a concrete beam. A furring strip longitudinally extends across the body between the first and the second ends and extends at least in part upwardly into the beam slot. The furring strip is provided with a lower fastener portion extending at least in part parallel to the bottom surface of the body.