There is disclosed a method of precisely controlling a discharge capacity of a sodium-sulfur battery in an interconnection system where a power generation device in which an output fluctuates is combined with a power storage compensation device including a plurality of sodium-sulfur batteries. Document creation, manipulition, editing, and output are provided by the present invention. In other embodiments, a radio frequency or microwave plasma flood gun is located in a cavity in at least one of the polepieces or between the polepieces. Each clearance surface has surface portion defining a convex profile, the convex profile forming a crest or transition. Feedwater is introduced into an evaporator, and the feedwater is evaporated to a selected concentration factor to produce a distillate having a small amount of residual solutes, and evaporator blowdown containing residual solids. In one aspect, a utility is disclosed for use in extracting content of interest from at least one website or other online data source.