A memory circuit includes a plurality of word lines, a plurality of bit lines, and a plurality of memory cells. The first substrate is formed to be thinner than the second substrate. The control signal indicates a request to change the scope of participation of at least one user in the session. Filling may include plastic, various rocks, various stones, pebbles, synthetic materials and the like. The system and method employing the use of a catalytic device coaxial-arranged dual leg apparatus comprising a housing having a first flow path and a second flow path having coaxially arranged portions, a device for selectively directing the exhaust gases between the first flow path and the second flow path, and a first NOx adsorbing catalyst contained in the first flow path.