The communication terminal apparatus measures reception quality and reports the measurement result to the base station apparatus, and the base station apparatus switches the transmission rate based on the reported result of the reception quality. The cooling system includes a cold plate assembly coupled to a heat-generating electronic element, and a heat exchange assembly disposed within the cover of the portable computer. A release structure of the container may release a portion of the liquid scent once a threshold pressure or threshold amount of pressure build-up is reached in the interior of the container. Rope packing seals may be provided on the rams having a vertical offset at the front faces of the rams such that rope packing seals on opposing front faces seal against each other. A second cantilevered support structure is wineglass-shaped to create a second area of packaging space between the rotor and the main shaft. An embedding medium may be employed for securing optical assemblies and protecting optical surfaces thereof.