A method to predict heat transfer coefficients for metal castings during quenching andor cooling is provided. A spectroscopic probe and a device for analyzing a sample by spectroscopy implementing the method are also disclosed. Upon the removal of stock from a warehouse, an inventory management system may be updated to indicate a transport unit of a vehicle that is being used to move the stock and, thus, provide visibility of the stock while it is in transit. The control subsystem generates control signals to selectively activate switching elements of the circuit to control the direction and the amount of electrical power flowing through the circuit between the first and second sources. More particularly, the present invention relates to a method and system for managing, via at least one intermediary server, access to information and the transfer thereof. The plunger is provided with a structure that is positionally fixed on the plunger.