In a large-scale mail system such as that of a mobile phone carrier, in case that a mail gateway has encountered a fault due to a fault-inducing mail in arrival thereat, the mail gateway identifies the cause of the fault to prevent the recurrence thereof. The preparation method includes: preparing BaMg2 particles or particles in which MgCO3 or Mg2 are attached to the outside of BaMg2; and sintering the particles at a high temperature. The logic description for implementing the modules on a programmable chip can be dynamically generated, allowing extensive parameterization of various modules. In one embodiment, putting the device in the HAME mode includes locking user input features. Once the balloon is completely filled and curing of the curable nucleus replacement material is accomplished, the catheter and ports are removed, and the annular defect can be sealed. Also disclosed is a lubricating oil composition containing at least a major amount of a base oil of lubricating viscosity and a minor amount of the molybdated succinimide complex.