A ceramic matrix composite having improved operating characteristics includes a barrier layer. The dielectric element overlies the front surface of a microelectronic element, and contacts exposed on the front surface of the microelectronic element are connected to the pads by elongated leads such as wire bonds. In various embodiments, the sorbent compositions are added directly to the fuel before combustion; are added partially to the fuel before combustion and partially into the flue gas post combustion zone; or are added completely into the flue gas post combustion zone. The clutch wheel is arranged to rotate as the conveyor belt advances. difficile infection and disease in animals, including humans, are described. An image coding unit, including a region that deviates from a boundary of a current picture, is divided to obtain a coding unit having a smaller size than the size of the image coding unit, and encoding is performed only in a region that does not deviate from the boundary of the current picture.