A method of manufacturing a compact fiber coupler. A discriminator determines whether the user gets out of the vehicle based on information acquired by a sensor installed in the vehicle when the authentication of the user is completed and outputs an operation signal when the authenticated user gets out of the vehicle. The pressure in the reaction chamber is adjusted to avoid the formation of protonated species and other impurities. The foregoing air conduits spurt cold or hot air, enabling the user to keep warm during the winter and keep cool during the summer, and providing the disabled or patients in the persistent vegetative state with heat-preserving effect, and functions of both body-washing and excrement cleaning while in bed. The tool 26 and the removal procedure enables lancets 14 to be removed without risk of injury or infection from contact with the contaminated needle 18 of the lancet 14. A gateway server in a transaction domain operates to provide a notification of an update in one or more services to one or more gateway servers in one or more remote transaction domains.