By increasing an interval between electrodes which drives liquid crystals, a gradient of an electric field applied between the electrodes can be controlled and an optimal electric field can be applied between the electrodes. An adsorption material may be contained in the container and may be configured to adsorb fuel vapor and to allow the adsorbed fuel vapor to be desorbed from the adsorption material as the atmospheric air introduced into the container flows through the adsorption material. Magnetic devices can be formed from the magnetic paste. The software can provide an observation functionality, an analysis functionality, a reporting functionality and a remediation functionality or some subset of those functionalities.