An artificial disc device for replacing a damaged nucleus is disclosed. The buffer circuit includes a first buffer unit, a second buffer unit, and a third buffer unit. A data object is established in memory on the first node, wherein defining a data object includes allocating memory for the data object. Metal oxide additives such as B2O3 or SnO2 as well as metal oxide precursor additives such as nitrates or carbonates of metals such as boron or tin can also be included in the ceramic article precursor. Detecting the error condition comprises detecting that the wireless-network entity is incorrectly no longer storing the connection data pertaining to the first data-link-layer connection.