Disclosed is a method and device for selecting documents, such as Web pages or sites, for presentation to a user, in response to a user expression of interest, during the course of presentation to the user of a document, such as a video or audio selection, whose content varies with time. The vibration-insulating rubber composition of the present invention includes: a rubber component having a conjugated diene compoundnon-conjugated olefin copolymer, and a non-conjugated diene-based polymer; a vulcanizing agent having a bismaleimide compound; and N-phenyl-N-benzenesulfonamide. 001 weight percent of magnesium is formed into an alloy with lead. Periodic structure is discovered in the business processes and their future activity is predicted. In particular, the reference ellipsometer provides a measurement which can be used to determine the total optical thickness of the stack. A butterfly valve disposed in an air passage is moved between a first open position and second closed position in a controlled fashion to prevent the build up un-burnt fuel in the event of the activation of the valve.