Damping factor universality

Seed, H. B., Idriss, I. M. (1970). Soil modules and damping factors for dynamic response analyses. Report EERC 70-10, Earthquake Engineering Research Center, University of California, Berkeley. 

Kasemo s laboratory at Chalmers University of Technology and Goteborg University was the source of the QCM-D technique [10], now embodied in instrumentation offered by Q-Sense AB. They define the dissipation, A as the inverse of the quality factor Q of the quartz crystal resonator [47] (see equation (4)). In the Q-Sense instrumentation, the driving RF power to the oscillator, causing it to respond at resonant frequency f, is switched off and the exponentially damped sinusoidal wave decays with a time constant r, where D -. .More than 100... 

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