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Harry Nyquist (/ ˈ n aɪ k w ɪ s t /, Swedish: [ˈnŷːkvɪst]; February 7, 1889 – April 4, 1976) was a Swedish-American physicist and electronic engineer who made important contributions to communication theory.
The name Nyquist–Shannon sampling theorem honours Harry Nyquist and Claude Shannon, but the theorem was also previously discovered by E. T. Whittaker (published in 1915), and Shannon cited Whittaker's paper in his work.
Early uses of the term Nyquist frequency, such as those cited above, are all consistent with the definition presented in this article.Some later publications, including some respectable textbooks, call twice the signal bandwidth the Nyquist frequency; [6] [7] this is a distinctly minority usage, and the frequency at twice the signal bandwidth is otherwise commonly referred to as the Nyquist rate.
The Nyquist plot for () = + + with s = jω.. In control theory and stability theory, the Nyquist stability criterion or Strecker–Nyquist stability criterion, independently discovered by the German electrical engineer Felix Strecker [] at Siemens in 1930 [1] [2] [3] and the Swedish-American electrical engineer Harry Nyquist at Bell Telephone Laboratories in 1932, [4] is a graphical technique ...
Harry Nyquist: 1927 Developed the Nyquist stability criterion for feedback systems (1932) and co-developed Nyquist–Shannon sampling theorem. Lev Pontryagin: Main author of Pontryagin's minimum principle for optimal control problems. Vasile Popov: Developed the Kalman–Yakubovich–Popov lemma and the Popov criterion for stability. John R ...
Harry Nyquist's 1924 paper, Certain Factors Affecting Telegraph Speed, contains a theoretical section quantifying "intelligence" and the "line speed" at which it can be transmitted by a communication system, giving the relation W = K log m (recalling the Boltzmann constant), where W is the speed of transmission of intelligence, m is the number ...
Aside from his history work, Harry Kelsey was key in helping establish downtown Los Angeles' Broadway Theater and Commercial Historic District. Harry Kelsey, former chief curator at L.A.'s Natural ...
The American Physical Society honors members with the designation Fellow for having made significant accomplishments to the field of physics. [1]The following list includes those fellows selected in the first 50 years of the tradition, that is, from 1921 through 1971.