The effective amplitude of alternating current relative to direct current RMS values may refer to voltage levels or current levels, and is equal to 0 707 times the peak value
- Square root of the arithmetical average of a set of squared instantaneous values DSAs perform rms averaging digitally on successive vibration spectra, frequency line by frequency line
Square root of the mean square value of a random variable Rupture front The instantaneous boundary between the slipping and locked parts of a fault during an earthquake Rupture in one direction on the fault is referred to as unilateral Rupture may radiate outward in a circular manner or it may radiate toward the two ends of the fault from an interior point, behavior referred to as bilateral Rupture velocity The speed at which a rupture front propagates during an earthquake S wave A seismic body wave that involves a shearing motion in a direction perpendicular to the direction of propagation When it is resolved into two orthogonal components in the plane perpendicular to the direction of propagation, SH denotes the horizontal component and SV denotes the orthogonal component
A measure of the amount of "unexplained" variation remaining when a set of tics or control points are registered A polynomial regression equation is fitted to relate the digitizer coordinates to real-world coordinates
The square root of the average square of the instantaneous values of an AC output For a sine wave the RMS value is 0 707 times the peak value The equivalent value of AC current, I, that will produce the same heating in a conductor with resistence, R, as a DC current of value I the corrosion of the protected structure