A method and system for scheduling and protecting quiet periods in a quiet zone for incumbent signal detection in a wireless communications system. The determination software, upon receiving a request for a dialing strategy associated with a contact identification, consults the rule set and the contact data, selects a dialing strategy based on the rules and the data, and returns the selected strategy to the outbound dialer. The substrate is etched to form a trench region, and a medium material layer and an oxide layer are subsequently formed on the substrate, filling the trench region. The stub is used to instantiate an object class. Only a final classification step must be trained with supervised learning, which reduces significantly the effort for adaptation to a recognition task.