Methods and systems for generating and executing a database process are described. The PAO device includes a self-expanding wire-frame prolate structure which is partially covered with an ePTFE membrane. The first arm is configured to pivot in conjunction with the operation member. The structure also includes a first set of electrodes positioned on the substrate and below the first asymmetrically-shaped mass and a second set of electrodes positioned on the substrate and below the second asymmetrically-shaped mass. The ratio of the two counts relates to finger position on the device, and their sum relates to finger pressure upon the device.