After receiving an alert for distribution in a target geographic area, a wireless carrier network may identify a first set of one or more coverage areas that are entirely encompassed within the target geographic area and a second set of one or more coverage areas that are only partially encompassed within the target geographic area. The variables R, R1, R2, R3, and R4 are defined herein. The grain size of the zirconia-based ceramic material can be controlled by the addition of lanthanum. Responsive to identifying the first directional RFID communicator of the first vehicle, sending the first message selection to the first directional RFID communicator from the second directional RFID communicator. The first end cooperates with the first surface to define a second holding space communicating with the first holding space.