A system includes a motor for producing motion when current is supplied to the motor and a motor controller coupled to the motor for receiving a motor current signal indicative of the current supplied to the motor. In some embodiments, the capacity of certain geophysical environments, such as continental shelves, islands, etc. The lead patterns connected to the ends of the heat generating resistance are both connected to dummy patterns in the vicinity of electrodes. Before sensing operation, the bit line is driven to the predetermined voltage when the above gate voltage is controlled to decrease.