A memory cell with a charge trapping structure is read by measuring current between the substrate region of the memory cell and one of the source region of the memory cell and the drain region of the memory cell. The present invention includes a frame, at least one fan and at least one fan guard. For each frequency band, multiple spatial directions are sensed for the RF signals using the antenna array. The method and system with unique algorithm is useful in getting instant feedback to stay the course or change in strategy for a desired result during the session. The engagement features may also include one or more functional features that allow the cartridge to effectively transfer the toner to the image forming device. Thereafter, the bulge spacing of the first arc segment is utilized for the remaining arc segments of the enclosed polylinepath.