A technique that can stably realize highly accurate image adjustment processing regardless of deterioration in an image forming characteristic and the like is provided. The non-volatile memory device includes a semiconductor substrate including a plurality of active regions and a pair of first pillars protruding from each active region. In one embodiment, the sheet of polymeric material comprises a polymer having a porous and preferably a node and fibril microstructure, which in one embodiment is selected from the group consisting of expanded polytetrafluoroethylene and expanded ultra high molecular weight polyethylene. In accordance with another embodiment, the retaining ring is wedged within the radial gap, welded to the disc hub member, and swaged over a top surface of the disc adjacent the interior edge. The append-only sequence is a storage representation of the plurality of events that allows only appending new records that represent new events but does not allow modifying and deleting existing records that represent already existing events. In particular a mixture including the anthocyanins, the bioflavonoids and the phenolics is described for this use.