A method for the operation of an in-line coating configuration comprising 2n+1 chambers, where n is an integer, and specifically is preferably 2. The subject ranking management system determines, using a taxonomy, one or more parent subject items related to one or more matching subject items that match a given set of search terms. The base station may determine, based on the current location, a set of future locations for the user device. The second medium and the metallic film are positioned in evanescent communication with respect to the excitation radiation, and the metallic film comprises lithographically patterned features designed to intensify surface plasmon resonance along the metallic film to promote the emission of Raman radiation from the analyte molecules.