Computer processes are disclosed for identifying and informing users of early adopter items. The spectroscopic analysis technique, which can be based on X-rays, fluorescent X-rays or gamma rays, is used in combination with stripping voltammetric measurement performed on the first electrode. The heater core has a coolant inlet outlet and is located downstream of the evaporator in the HVAC duct. By utilizing callback objects, the middleware wrapper facilitates the transmission of a request and replies between distributed application components by posting the requests or replies on an appropriate request or reply publishsubscribe topic. Multiple species can be identified using the one or more individual velocities or ratio thereof.