Cyberneticist Cyberneticist A cyberneticist or a cybernetician is a person who practices cybernetics. Heinz von Foerster once told Stuart Umpleby that Norbert Wiener preferred the term "cybernetician" rather than "cyberneticist", perhaps because Wiener was a mathematician rather than a physicist. The word cyberneticist was used by Nicolas Rashevsky who began as a theoretical physicist, Robert Rosen, who began his career as a mathematician, regarded Neuro cybernetics—and more generally Biocybernetics—as fields closely allied to Mathematical Biology and Mathematical Biophysics in which control theory and dynamical system theories also play significant roles. Today "cybernetician" is preferred by members of the American Society for
Wiener filter criterion of the latter does not rely on cross-correlations or auto-correlations. Its solution converges to the Wiener filter solution. For complex signals, the derivation of the complex Wiener filter is performed by minimizing formula_55 =formula_56. This involves computing partial derivatives with respect to both the real and imaginary parts of formula_32, and requiring them both to be zero. The resulting Wiener-Hopf equations are: which can be rewritten in matrix form: Note here that:formula_60 The Wiener coefficient vector is then computed as:formula_61 The Wiener filter has a variety of applications in signal processing, image processing, control systems, and digital communications. These