Abstract: A system that enables digital distribution of copyrighted sheet music—and allows musician to view the copyrighted sheet music on personal computing devices—while preventing the unauthorized distribution of copyrighted sheet music. An electronic commerce platform provides functionality to purchase copies of copyrighted sheet music. A network security module provides login credentials for purchasers and musicians (and, in some embodiments, limits the number of simultaneous logins). A graphical user interface provides functionality for each purchaser to distribute each purchased copy to one—and only one—musician. In some embodiments, the system allows purchasers to recall sheet music distributed to a first musician and distribute the recalled sheet music to a second musician (without providing functionality for the first musician to view the recalled sheet music).

Abstract: The present disclosure describes a catalytic aftertreatment system that includes a dosing compartment including a doser configured to introduce a diesel exhaust fluid (DEF) including urea into a diesel exhaust; a mixing chamber subsequent to the doser configured to mix the DEF with the diesel exhaust, the mixing chamber including an optional static metallic mixer, and a catalyst substrate including a combined urea hydrolysis-selective catalytic reduction binary catalyst coated thereon; and a SCR unit subsequent to the mixing chamber unit, including an SCR catalyst configured to facilitate reduction of nitrogen oxide (NOx) in the diesel exhaust with NH3.