Energy distribution of gamma rays scattered around a soil density probe.

At head of title: Project report.

Scale model study of low-density concrete impact attenuators. Final report.

Ohio Department of Transportation, Columbus

A sediment density meter /

A sediment density meter has been developed for in situ measurement of ocean bottom materials in the range from about 1.0 to 2.0 gms per cc. The device is about 26 feet long and is powered by self-contained batteries.

Back scattering of a plane electromagnetic wave from an infinite cylinder of plasma with small axial gradients and arbitrary radial gradients of electron density : normal incidence /

"Prepared under contract no. NOrd 18053."