A structure for containing a volume of lubricant additive gel which is disposed within a mechanical system, in close proximity to a wear critical surface, and which is configured to provide a release of the contained additives into a flow of lubricant over time or as a function of temperature in a site-specific manner to minimize wear or reduce oil oxidation due to harsh operating conditions. The bits dividing device divides the data recording each pixel point of the digital image, on the basis of bit, into bits for calculating the eigenvalue of the image, bits for hiding the watermark and bits for locating altered regions. Inside-out fill techniques can include selective deposition on etched tungsten layers in features. The article of foot apparel conforms more closely to the actual physiology of the foot and allows the heel of the foot to remain centered in the heel pad when worn. Since this key is transmitted in plaintext this involves security problems. Bosses around the lower opening of the cover inhibit twisting of locked clamp to prevent inadvertent opening.