Keyword: Soils

Briefs: Defense

Successful sensor installation is important, as it directly affects how the sensor will perform. If conducted incorrectly, it could seriously degrade the data received and...

Articles: Aerospace

A century-old technology that scientists use to probe the ionosphere — the important atmospheric layer that can interfere with the transmission of radio waves — is getting...

Briefs: Information Technology

In order to enable off-road vehicle dynamics analysis simulations when traveling on soft soil, a deformable Vehicle Terrain Interface (VTI) model that interfaces with...

Briefs: Physical Sciences

Abullet cannot penetrate through a sandbag while an arrow can, so understanding the behavior of granular materials such as sand and its energy absorption in a blast is...

Briefs: RF & Microwave Electronics

During the Apollo Program, astronauts on the Moon encountered a small menace that created big problems: lunar dust. Similar to how tiny bits of Styrofoam behave on Earth — adhering to...

Application Briefs: Defense

U.S. Army and Marine troops have cultivated a creative, lifesaving technology out of heavy-duty telescoping poles. The CMD fiberglass telescoping push/pull rods, normally used for cable and wire management applications,...

Articles: Aerospace

Throughout history, the use of sand tables has been common practice in rehearsing military strategy in the field. Built on piles of sand with scale models of operational...

Application Briefs: RF & Microwave Electronics

One of the greatest dangers to aircraft — playing a role in numerous destructive and fatal accidents around the world — comes in the form of droplets of water. In clean air, cloud...

Briefs: Physical Sciences
Acoustic Detection Using Reverberation

Acoustic detection of undersea objects is difficult due to the uncertain environment and even more difficult when the objects are buried in the seabed. First, sediments generate high backscattering noise due to heterogeneous scatters within the sediments, clouding the object.

Briefs: Materials

Geopolymer concrete has been proposed as an alternative to Portland cement concrete in applications requiring high degrees of fire resistance, because the intrinsic chemistry of the geopolymer binder...

Briefs: Materials

AFRL engineers used prototypes of recently developed ground-penetrating radar (GPR) and electronic cone penetrometer (ECP) devices to determine whether voids and anomalies in a particular airfield's subsoil were...