The invention provides an immunostimulatory nucleic acid comprising CpG motifs, and methods of use thereof in stimulating immunity. The filter element comprises at least two flanks, each of these flanks comprises a ceramic plate. Code books for transcoded documents received at a wireless mobile communication device are either retrieved from a memory on the device or requested from a data server. A tolerance ring is interposed between each end of the ceramic spool and the end cap. When the sweeping mechanism moves backwards, the cleaner member moves in contact with the recordation medium surface to clean the recordation medium surface.