Digital television broadcasting using COFDM modulation is designed to modulate orthogonal frequency-division-multiplexed mid-band carriers with metadata including synchronization signals and transmission-mode signals. The microstructure has structural members, at least one of which comprises an intermetallic compound. Preferably, the substantially hollow structure includes an end wall that, along with the bottom edge portion, forms a port by which access to the plurality of tattoo needles is had from the exterior of the substantially hollow structure. The EHM unit also includes at least one processing unit operable to be pre-configured to identify a specified fault in the asset using the input signals and an asset-specific model that includes a combination of standard subsystem models.