Expression and stability of desirable proteins in transgenic plants are promoted and maintained by treatment with a protein transport enhancer. The use of a variety of parametrization metrics may be supplemented and improved by the fine-to-coarse look ahead techniques of the invention. Subsequently, the call park number and the location of the second user agent are sent to a server, which authorizes the second user agent for call parking. By analyzing the change in distances with respect to time, the occupant’s motion can be tracked.