Innumeracy: The meaning of the numbers we use [Testing Ourselves]
KünyeSEVGİ, L. (2007). Innumeracy: The meaning of the numbers we use [Testing Ourselves]e. IEEE Antennas and Propagation Magazine, 49 (2), pp. 184-190. http://dx.doi.org/10.1109/MAP.2007.376629.
Frequency analysis is one of the key issues in engineering. Numerically, discrete or fast Fourier transformations (DETs orFFTs) are used to obtain the frequency content of a time signal. These are totally different from the mathematical Fourier transform, based on infinitely extended time- or frequency-domain integrations. Remember, once you use a computer, you enter into a non-physical, unrealistic, synthetic environment.