Methods and apparatus for providing a resistance variable memory device with agglomeration prevention and thermal stability. Information regarding insurance policies to be reinsured, including its terms, are entered into a database in the computer system. The network node then sends the query message to a name server, which is part of a distributed system that provides a global naming service, wherein the name server additionally stores configuration information. The mobile wireless system discards the received message packet in response to determining from the profile that the mobile wireless device is not permitted to pass messages on behalf of tethered devices. It is preferable that the mol ratio of Na and K is to be 2:8\u02dc8:2, the content of CNO\u2212 is to be 5\u02dc35 wt %, the content of CN\u2212 in the salt bath is less than 2 wt % and the temperature of the salt bath is to be 450\u02dc650\xb0 C.