Disclosed is a simple, analytical method that can be utilized by hydrogen filling stations for directly and accurately calculating the end-of-fill temperature in a hydrogen tank that, in turn, allows for improvements in the fill quantity while tending to reduce refueling time. In one embodiment, a request for a user to play a game is received at a validation service. First channel information is generated based on a first set of a first type CSI-RS and a second type CSI-RS. The lens units are elongated prisms each having a substantially triangular cross section. So, the difference in abrasion amount makes it possible to lower a level irregularity of the wear rail. The control circuit for controlling the charging and discharging of the flexible textile capacitor, and the charging part is electrically coupled with the flexible textile capacitor the power source, and the charging part.