A feedhorn driving method and apparatus allows the establishment of multiple phase centers using only a single multimode feedhorn. The memory can operate in one of two different modes, a normal mode and a cache line mode. Inclusion of silicone andor wax additive in a filter media has surprisingly been found to increase filtration efficiency, for example, by 10-15%. This invention relates to hybrid corn seeds and plants produced by crossing the inbred line G1704 with at least one other corn line. The present invention accelerates the processing of the C-RNC, thereby improving the system performance.