Methods and apparatus for nonintrusive monitoring of web browser usage are disclosed. The inventive method comprises an n-doping stage during which a donor species is vacuum diffused in a diamond that was initially doped with an acceptor, in order to form donor groups containing the donor species, at a temperature that is less than or equal to the dissociation temperature of the complexes formed between the acceptor and the donor species. A drive bar, oriented perpendicularly to the gantry and to a vertical axis, may travel to support and move the workpiece along its line of orientation. In response to the REFER request message, the second communication device performs operations to terminate the first full-duplex call and establish a second full-duplex call with the hybrid application server.