A compositionally graded semiconductor device and a method of making same are disclosed that provides an efficient p-type doping for wide bandgap semiconductors by exploiting electronic polarization within the crystalline lattice. The event may include an expiration of a timer, a change in an operating condition of the application, a detection of work to be performed by the application, or some other event. An electrically conductive plating is formed on an inner surface of the opening. When receiving a notification message from the application server, the notification message may be examined to forward the notification message directly to the client application without invoking other applications in the client device if the notification message carries a subtopic identifier of the client application. The electronic label units respectively output a plurality of state information to the control unit so that the control unit can monitor operation states of the electronic label units according to the state information. The present invention is particularly well adapted to be formed as a push-pull container closure for sports bottles and the like.