Apparatus and methods for cutting compressible cellular polymers such as polyurethane foam, are characterized by a first die roller and a pressure roller, wherein both rollers define raised portions separated by recesses or depressions, and the raised portions on the first die roller register with the recesses of the pressure roller at a nip formed between the rollers. In particular, a component of the computing environment which is associated with at least a portion of a unit of work is updated from one version to another version. The printed circuit board is positioned on the base board. Motion speed is calculated for each picture of the GOF with respect to the first picture of the GOF.