A method is provided to quantify andor qualify psychological and physiological components of stress in mammals, in which a stimulus can be applied to the test subject’s environment during the test. An ink feed passage opens into the ink channel to transport ink into the channel from an ink reservoir. Standardized DC sockets accommodate a variety of voltage requirements typical of portable digital devices. The network devices may include a combination routerswitch, which has the capability of switching both digital data and RF data, RFID readers, RFID readerwriter pads, and other devices. Pharmaceutical compositions of the ester-containing thiazolidinedione analogs are also taught.