John D. Kraus (1910–2004) was a legendary American physicist, electrical engineer, and Professor of Electrical Engineering and Astronomy at Ohio State University. He was a pioneer in radio astronomy and antenna design, inventing the helical antenna, the corner reflector antenna, and the W8JK close-spaced array.

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Vector algebra and coordinate systems (Cartesian, Cylindrical, Spherical). Gradient, Divergence, and Curl operations. The Divergence Theorem and Stokes' Theorem. 2. Static and Quasi-Static Fields

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