Publications by authors named "James P Wacker"
Background: To ensure the safety of trees, two NDT (nondestructive testing) techniques, electric resistance tomography and stress wave tomography, were employed to quantitatively detect and characterize the internal decay of standing trees. Comparisons between those two techniques were done to make full use of the individual capability for decay detection.
Methods: Eighty trees (40 and 40 ) were detected, then wood increment cores were obtained from each cross disc trial.