A semiconductor memory device that speeds up its operation. The method includes asymmetrical acquisition of under-sampled MRI data, obtaining low resolution images, and then estimating a magnetic field map and phase maps of water and fat image signals from the low resolution images. A wall of the manifold string andor a selectively placed fluid control device diverts fluid mixture flow streams from one passageway to another radially disposed inward or outward passageway to selectively control pressurized fluid communication, thereby forming a plurality of pressure bathers. A capacitor from one pole to the housing can correspond to the difference in capacitance of both poles to the environment.