Learn how to do the whip in west coast swing dance from dance champion Robert Royston in this Howcast dance video.
modulation transfer function (MTF) a quantitative measure of the ability of an imaging system to reproduce patterns that vary in spatial frequency. The MTF is useful in predicting image degradation in a series of radiographic components.
SecurActive Performance Vision. Modulation is the addition of information to an electronic or optical carrier signal. A carrier signal is one with a steady waveform -- constant height (amplitude) and frequency. Frequency modulation (FM), in which the frequency of the carrier waveform is varied to reflect the frequency of the data. 2  Phase modulation (PM), in which the frequency of the carrier waveform is varied to reflect changes in the frequency of the data (similar but not the same as FM).