Compositions including modified carbide-containing nanorods andor modified oxycarbide-containing nanorods andor modified carbon nanotubes bearing carbides and oxycarbides and methods of making the same are provided. The series information storing device feeds the series information to a change state comparing device, and the basic change information storing device feeds the basic change information to the change state comparing device. Next, the IVR Server determines an estimated wait time, generates a token, and links the estimated wait time and the token to the session by mapping the token and the estimated wait time to an entry of the session ID in the queue table.