Methods, systems, and computer program instructions for enabling users of pervasive devices to remotely access and manipulate information in ways that might otherwise be impossible or impractical because of inherent limitations of the device. Upon detection of a premature atrial contraction, a pace is delivered to a ventricle at a specified AV interval selected as either a late-pace or early-pace value. Steel strip is delivered downwardly to the nip through a metal delivery system having a tundish and core nozzles. Each separation unit preferably includes a vibration-damping element. The present invention can be applied to a personal computer. The invention also relates to the use of the sleeve composition to prepare sleeves, the sleeves prepared with the sleeve compositions, and the use of the sleeves to prepare metal castings.