The semiconductor device includes a control signal driver, a control signal latch unit, an internal driver and a buffer. An index manager on the storage system may initially produce the central index by examining each file in a file system and update the central index thereafter by examining only those files that have changed since the central index was initially produced or last updated. The location is detected using the previous histogram, based on a received signal strength included in each most recent check-in data, in order to judge whether the check-in data is correct, depending on whether a location name of the detected location matches the location name designated by the user and included in each most recent check-in data. Of particular interest is the expression of synthase protein factors in conjunction with expression of plant medium-chain acyl-ACP thioesterases for production of increased levels andor modified ratios of medium-chain fatty acids in oils of transgenic plant seeds. A determination is made as to which of the predefined service areas the requesting party is in, when the requesting party is in one of the predefined service areas. In some embodiments, the pole piece is coupled to a back plate inside the tube, which in turn is coupled to the hard magnet.