Statistical analysis for segmental duration rules in Japanese speech synthesis

A carrier is provided for a portable heater, the heater comprising a solid combustible fuel element and an air permeable incombustible casing, said carrier being in the form of a bag of air pervious material having a zippered opening, and a flap secured to an outer wall of the bag at the upper and lower margins, leaving hand openings at either end. The openings may be provided with sleeves, and the flap-covered outer wall may have a slit to provide access to the bag interior.