times the magnitude of the reciprocal of the fractional energy loss over one period of oscillation, i.e. 
[P5.2]
for: an oscillator
is: a 'figure of merit' describing the quality of the oscillator. [P5.2]
is: the factor by which the power absorption of a driven oscillator on resonance exceeds that for the oscillator when the frequency of the driving force is well away from the resonance frequency. [P5.3]
is equal: to the ratio of the resonance frequency to the resonance bandwidth between the two half-power points. [P5.3]
is also given: by times the magnitude of the reciprocal of the fractional energy loss over one period of oscillation, i.e. [P5.2]
Copyright 1997, The Open University