A user interface aids in creation of customized pre-defined queries that can be used for identifying particular search results relevant to a topic. The overall motion information generator controls a surveillance camera which is an external image capturing system and supplies control information of the surveillance camera to the search region variable-shaped motion detector as overall motion information. A residual echo power estimating unit estimates estimated residual echo power from the received signal power and the estimated amount of acoustic coupling, and a signal-to-echo ratio estimating unit estimates a ratio between the send-mid signal power and the estimated residual echo power. The valve engages the accumulator and selectively administers or obstructs the release of the gas into the tank as directed by an actuator contained within the chamber housing. A pair of rods connects the plates to the transmissions.