To provide a method and a system for creating a mini time key from a time key, a plurality of mini time keys are created within a unit time period. A case back is detachably attached to a back side end part of the case band. The voltage sensitive device is electrically connected between a ground on the ground fault circuit interrupt outlet and a neutral located on the ground fault circuit interrupt outlet. The mechanisms, in response to determining that that locally cached copy is a latest version: perform the write operation on the locally cached copy to generate an updated locally cached copy, and transmit a cluster event notification to other data processing systems of the cluster indicating the shared resource was written to and which data processing system performed the write operation. The nitrogen and phosphorus also prevent defects from forming at the boundary between the resistor layer and metal conductor.