There is provided a compact, high-sensitivity acceleration sensor. In general, embodiments consistent with the present disclosure may be configured to distribute the processing load associated with the detection and tracking of different faces in an image between multiple data processors. Further, a groove area ratio G for a wear rate 20% falls in a range of \u22670. The method further comprises selectively breaking the at least one nanotube using an electrical current, removing the metal contacts, cleaning a remaining nanotube, and depositing a first metal contact in contact with a first end of the nanotube and a second metal contact in contact with a second end of the nanotube.