Abstract: Systems, methods and apparatus for controlling operation of dual fuel engines are disclosed that regulate the fuelling amounts provided by a first fuel and a second fuel during operation of the engine. The first fuel can be a liquid fuel and the second fuel can be a gaseous fuel. The fuelling amounts are controlled to improve operational outcomes of the duel fuel engine.

Abstract: A multi-deck playing card set includes a combination of at least two standard fifty-two card decks, each card having a front side, a back side, and a top portion and a bottom portion on each side. The multi-deck card set also includes a mark or indicia, either in color, black and white, shades of color, or shades of black and white, on each individual card, located on at least one side of the card to distinguish cards belonging to a particular individual deck of cards. Each individual deck has a unique mark or indicia distinguishing all cards from the particular deck. The multi-deck card set also may be adapted for use in table games or video card playing machines and/or systems.