Phase change memory devices may include a semiconductor substrate of a first conductivity type and a plurality of parallel word lines disposed on the semiconductor substrate. The user interface may be invoked in a number of development interfaces such as, for example, a designer or an editor. A cockpit vent comprises a frame defining at least one aperature for introducing ambient air into the cockpit. A signal processor receiving the high fidelity signal representative of the loss of metallic cross section from the detector extracts a wire rope roughness component from the high fidelity signal.