Following data writing into a memory cell array according to an internal address signal, the data read out from each memory cell is compared with expected value data in a readout operation. A torsion bar supports a mirror and defines a rotational axis of the mirror. , stomach, of a patient to treat obesity is disclosed. Indicator systems include an indicator device coupled to an enclosure containing critical equipment. Embodiments include defining separate areas of the wafer, providing separate sections of the thermal energy transfer unit for each separate area, and separately detecting the temperature of each separate area to separately control the supply of thermal energy relative to the thermal energy transfer unit associated with the separate area. 35 \u03bcm and 3 \u03bcm and is oriented at 45\xb0 relative to a liquid-crystal direction of the liquid crystal display device, wherein the liquid crystal layer has a thickness between 0.