A roll paper print unit 120 processes roll paper. During operation, the system maintains a priority for each simultaneously executing thread. The first area is substantially level with the second areas. When the duty-cycle is applied to the circuit at time interval N+1, the peak inductor current is kept below a maximum allowable inductor current level. The extract of the present invention can be effectively used for the prevention and the treatment of obesity by inhibiting weight gain by high-fat diet, lowering blood cholesterol and decreasing neutral fat. The LCD touchscreen displays autostereoscopic images so that a game player can reach into the game world and move virtual objects in 3D by pointing to them using the autostereoscopic touchscreen.