A video picture information delivering apparatus delivers moving pictures according to a request from a terminal device. The adjusting assembly further comprises a fixing block disposed between the stationary frame and the movable frame and received in the stationary frame, the fixing block having a passage with a first rectangular cross-section, and rotating blocks received in the upper frame and the lower frame respectively and having a rotating handle and an adjusting shaft perpendicular to the rotating handle. From the sensor measurements, the extent of exhaust gas catalytic converter ageing may be assessed. An integral, simple and convenient means is provided to vary the intensity and pattern of the heat output, thereby controlling the cooking performance of the stove. The invention also provides silicate-based glass compositions for use in immobilizing radioactive andor hazardous waste.