J. B. Johnson (swimmer)
J. B. Johnson may refer to: * John Bertrand Johnson, Swedish-born American electrical engineer and physicist * J. B. Johnson (Florida politician), American attorney and politician * John Butler Johnson, engineer who developed Johnson's parabolic formula In structural engineering, Johnson's parabolic formula is an empirically based equation for calculating the critical buckling stress of a column. The formula was developed by John Butler Johnson in 1893 as an alternative to Euler's critical load ...

John Bertrand Johnson
John Erik Bertrand Johnson (born Johan Erik Bertrand; October 2, 1887 – November 27, 1970) was a Swedish-born American electrical engineer and physicist. He created the first cathode-ray tube oscilloscope and detailed a fundamental source of random interference with information traveling on wires, now called Johnson–Nyquist noise. Early life Johan Erik Bertrand was born in Gothenburg, Sweden on October 2, 1887 to the 20-year-old, unmarried Augusta Johansdotte. The family had lived in extreme poverty until his uncle John A. Johnson helped them emigrate to the United States. The younger John emigrated to the United States on July 3, 1904 where his uncle arranged for his education. He graduated from the University of North Dakota in 1913, receiving his Masters degree the following year. Career Johnson received a PhD in Physics at Yale University in 1917, after which he went to work for Western Electric in their engineering department, primarily studying ionized gases. There he ...
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