A coating apparatus for coating a material to be coated with a solution is disclosed, preferably for coating pharmaceuticals. A network switch includes first and second port circuitry and control circuitry. These steps include minting and distributing the chip card, establishing that the key pair and card are given to the right person, and creating the certificate library. The physical calibration results are combined with simulation based calibration results to calibrate timing propagation delay between the ATE component and the DUT component. Assays for screening candidate agents that inhibit goblet cell proliferation are also provided.