Norbert Wiener the amount of noise present in a signal by comparison with an estimate of the desired noiseless signal. Wiener developed the filter at the Radiation Laboratory at MIT to predict the position of German bombers from radar reflections. It is necessary to predict the future, because by the time the shell reaches the vicinity of the target, the target has moved, and maybe has changed direction slightly. They even modeled the muscle response of the pilot, which led eventually to cybernetics. The unmanned V1's were particularly easy to model, and on a good day, American guns fitted with Wiener filters
Systematics – study of multi-term systems meta-scientific context, but Bennett proposed that there was a 'law' for every integral number, and that this could help people understand practical things such as management and education. Parallels can be drawn between Bennettian Systematics and the work of C. G. Jung and Marie Louise von Franz on number as archetypal, as well as with the philosophies of engineers such as Buckminster Fuller and Arthur Young. Bennettian Systematics has an integrative programme. Throughout all cultures and throughout all disciplines there are discernible threads of meaning associated with multi-term systems that might otherwise be missed. Bennettian Systematics links with understanding which