An oil pump unit includes an additional outlet port connected to the downstream side of the pump through the pump cover. In some aspects, a contact lens includes: a substrate; one or more sensors disposed on or within the substrate, wherein the one or more sensors senses fatigue andor an emotional state of a wearer of the contact lens; and an antenna disposed on or within the substrate, that communicates information sensed by the one or more sensors. An insulating material layer and a top electrode material layer are sequentially formed on the surface of the bottom electrode material layer. Embodiments of the invention may be scaled to accommodate larger numbers of caches at a particular cache level and may be implemented among multiple cache levels. The system may further include a control element for controlling the actuation assembly.