A device, which conveys and handles material from a combustion boiler, includes at least one conveyor belt and a housing surrounding the conveyor belt. The foldable stand includes a platform formed by two bearing bars that define a bearing surface for supporting a machine. The computer processor allocates a second memory portion corresponding to a second stack, wherein the second stack corresponds to a second class of execution items. A connecting rod may include a follower configured to follow a cam. A method for coordinating uplink transmission in the OFDMA system for reducing uplink interference is also provided.