| http://www.w3.org/ns/prov#value | - are shown to be the largest for a SV wave incident on the surface containing the crack at an angle just above the critical angle for longitudinal waves.A method which provides information on whether a fracture is surface-breaking or subsurface has been modelled and its optimal experimental set-up examined in Paper C. The main assumption of the model is that water carried by pressurized pipes infi
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