Polonium were marketed by Firestone from 1940 to 1953. While the amount of radiation from the plugs was minuscule and not a threat to the consumer, the benefits of such plugs quickly diminished after approximately a month because of polonium's short half-life and because buildup on the conductors would block the radiation that improved engine performance. (The premise behind the polonium spark plug, as well as Alfred Matthew Hubbard's prototype radium plug that preceded it, was that the radiation would improve ionization of the fuel in the cylinder and thus allow the motor to fire more quickly and efficiently.) Polonium is
Field with one element discrete Fourier transform (complex-valued) and the related number-theoretic transform (Z/"n"Z-valued). Field with one element In mathematics, the field with one element is a suggestive name for an object that should behave similarly to a finite field with a single element, if such a field could exist. This object is denoted F, or, in a French–English pun, F. The name "field with one element" and the notation F are only suggestive, as there is no field with one element in classical abstract algebra. Instead, F refers to the idea that there should be a way to replace sets and operations, the