Methods and compositions comprising a DNA expression cassette for producing ss-cDNA inside a host cell. The element includes a first magnetic film, a second magnetic film, and a first nonmagnetic layer formed between the first magnetic film and the second magnetic film. The controller is further configured to read the data and determine a number of bits having the first of the plurality of logical states in the read data, and determine a difference between the number of bits of the written data programmed in the first logical state and the number of bits having the first logical state in the read data. A spring urges the nose of the plunger out through an aperture in the spray head. The first regions include collector side and cathode side first regions, and the second regions include collector side and cathode side second regions. The floating bodies for the cells are formed over the buried oxide, the transistors in the logic section are formed in the bulk silicon.