The topics of control engineering and signal processing continue to ?o- ish and develop. In common with general scienti?c investigation, new ideas, concepts and interpretations emerge quite spontaneously and these are then discussed, used, discardedorsubsumedinto theprevailingsubjectparadigm. Sometimes these innovative concepts coalesce into a new sub-discipline within the broad subject tapestry of control and signal processing. This p- liminary battle between old and new usually takes place at conferences, through the Internet and in the journals of the discipline. After a little more...