This nondestructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and detects the reflected signals from subsurface structures.

This defect is particularly worrying since it is very difficult to detect using nondestructive methods such as X-ray or ultrasonic testing.

They provide a nondestructive method of determining the extent of vinegar syndrome in film collections.

Greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.

Ground Penetrating Radar (GPR) - GPR is a nondestructive geophysical method that "sees" underground and produces a record of subsurface features-without drilling, probing, digging, or coring.

As a guiding principle, members of the First Earth Battalion seek nondestructive methods of conflict resolution because their first loyalty is to the planet.

A nondestructive method is valuable.

A combination of nondestructive and destructive methods of PIE are common.

The Titans used the technique as an easy, nondestructive method of shutting Quentin down whenever he grew too unruly.

LEAD: An inexpensive and nondestructive method for detecting flaws in concrete has been developed by researchers at the Commerce Department's National Bureau of Standards.