The present invention provides a method for combining a fluid delivery system with an analysis system for performing immunological or other chemical of biological assays. The substrate has an upper surface and a lower surface and further has a receiving area. 50 weight % of at least one oxide of element selected from the group consisting of Fe, Co, Ni, Cu, and Zn in terms of FeO32, CoO43, NiO, CuO, and ZnO, 0. The strand of material may be attached to the anchor by a connecting region. One or more of the signal paths may include an adjustable delay circuit.