Circuitry including a logic circuitry portion and a delay circuitry portion, with the circuitry having the following features: the logic circuitry is designed to receive a set of input signals including a first input signal and a second input signal; and the delay circuitry portion includes a transistor connected so that the first input signal gates the second input signal. The method at a first node includes: receiving a request from a client application; determining that the first node cannot service the request successfully; forwarding the request from the first node to a second peer node; receiving a response at the first node on completion of the request by the second peer node; and forwarding the response from the first node to the client application. The process of the invention allows a seed layer for the coil to be deposited on the side walls of the trenches for the first and second coil layers. The method and system also include etching the insulating layer to provide at least one contact hole. Said interference filter comprises a plurality of alternating layers of magnesium fluoride and zirconium oxide, where the diffuserinterference filterdetector system has a spectral response equivalent to the erythema action curve CIE.