An on-line primary database is momentarily QUIESCED to enable a physically consistent snapshot of the primary database to be mirrored to a secondary database as a backup while allowing the primary database to continue on servicing multiple user applications. The rotary switch includes a housing whose top portion has a sensing surface. The cucurbituril derivatives are easily prepared as a mixture by one of the three new methods, and each cucurbituril derivative can be separated from the mixture by fractional crystallization. A nut is used to lock the rear outer thread in order to limit the rotation. The delay is calculated taking into account at least in part the correction impedance and the parasitic element effect. The present invention also provides under body armour garments comprising the neck protector.