The present invention relates to the reservation of agents with respect to work requiring particular agent skills. The recording is at least partially based on an indication that the user-level interrupt is undeliverable to a recipient application thread executing on a processor core of a plurality of processor cores in a multi-core system. A first electrode and a second electrode assembly disposed within the channel and configured to apply an electrical potential across at least a portion of the channel to electrically excite the vaporous material. The tissue anchor can be used to help stabilize tissue in a surgical procedure, e.