In one or more embodiments, a composite die includes a die face defining a protrusion and including a first metal, and a die base supporting the die face, the die base including a housing, a first filler positioned within the housing and contacting the protrusion, and a bridging member reinforcing the housing, the housing including a second metal different than the first metal. The data structure includes data entities and representations of relationships between the data entities. A patient-monitor interface unit receives at least one patient vital-sign signal from the patient, and then transmits to the remote terminal via the communicating unit.