Systems and methods are disclosed for managing deduplicated images of data objects that change over time. The interconnected two flat parts are provided with a number of optically functional sections ane, on the sides of the flat parts facing one another positioning aids are formed which facilitate alignment of at least two flat parts to one another. The cooling hole includes a metering section that extends from an inlet in the first surface of the wall to a transition, a diffusing section that extends from the transition to an outlet in the second surface of the wall, and a cusp on the transition. Remaining data regions in the nitride read-only memory cell are programmed in a time order according to their descending Vt values. Alternatively, re-encoded symbol energy may be used as the second dimension of the quality metric. Each of the Mtop pad and the Mtop-1 pad has positive enclosures to the bond ball in all horizontal directions.