One embodiment of the present invention processes a signal of interest through an optional reference channel, combines the resulting signal with white noise, and then processes the noisy signal through a reference receiver. The vias may be filled with a conductive material such as, for example, a fritless ink. The bearing has a groove into which the pressure plate having a groove into which the outer surface of the ring snap-fits. In addition, the client devices can send and receive poll communications that may be used during processing of the project to control, manage and coordinate the project activities of the distributed devices. The composition for film formation contains at least one member selected from an aromatic polyarylene and an aromatic poly, a polyvinylsiloxane, and an organic solvent.