The invention relates to a method for decision support of a first combat aircraft in a duel situation with a second combat aircraft. The invention further provides methods of identifying differentially methylated DNA biomarker sequences and their use the detection and diagnosis of ovarian cancer. The first n-type active area and the second n-type active area are contiguously formed together. In another embodiment, both the first and second gears are composite gears having an outer toothed ring formed from a robust and thermally stable molded polymer. Means for identifying the customer associated with a particular processed bill after the deposit transaction has been completed is also included in the system.