In various embodiments of the present invention, a capsule is provided including a hydrophobic inner layer and at least one hydrophilic outer layer. Specifically, the present invention pertains to a method of using a set of hierarchical rules to enable an efficient and speedy synchronization between multiple copies of a database. A relatively small change in the piston airbag volume provides a change in the spring rate of air spring assembly as the diameter of the rolloff surface is selectively modified. The moveable slide has at least one slot formed on the top rail for receiving a mounting post of an object, such as a server or server mounting arm.