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Chilling With Sound

Have a hankering to chill your Cherry Garcia™ and to listen to Jerry Garcia using the same system? The concept may not be too far off. The Office of Naval Research has long funded researchers at Penn State who now have proved they can build a compact freezer case substituting sound waves for...

December 06, 2002

Cool Running Semiconductors

Solid-state semiconductors don't handle heat very well. If they're operated at high power, they tend to burn out. Heat poses other problems as well—the hotter the device, the greater the electrical resistance (and the lower the efficiency). Digital semiconductor devices also have capacitive elements...

December 06, 2002

Detecting Breast Cancer with a New Algorithm

What does remote sensing for camouflaged enemy ground vehicles have to do with breast cancer diagnosis? By next year, perhaps plenty. A smart sensor fusion algorithm modeled on the human visual/brain "unsupervised" learning system and a 200 channel hyperspectral remote sensing capability have been...

September 04, 2002

Eyes on the Skies

No question about it, Toto and Auntie Em could have used a few extra minutes to find Dorothy and get into the storm cellar. When severe weather sweeps through an area, every second of warning time is critical. More time equals more lives saved — the equation is that simple. A unique partnership has...

February 06, 2002

Felling Antenna Forests AMRC-C

In today's new world of network centric warfare, where there is an ever-greater dependence on vast amounts of information that must be received and transmitted, too many antennas are a shipboard problem. They're heavy, they tend to interfere with one another, and they're unstealthy because they...

December 03, 2002

Felling Antenna Forests ONR's AMRF

As the services scramble to adapt to 21st century visions of "network-centric warfare" that call for vast growth in tactical information exchange, they'll be looking for innovative ways to multiply communications networking capabilities—while slashing costs. All the services are looking at...

December 01, 2002

Fiery Ice From the Sea

If you know anything about methane gas – and the Office of Naval Research thinks you should – it probably has something to do with swamp gas, and a faintly unpleasant sulfurous smell that rises from country marshes on sultry, summer evenings, or perhaps – for more romantic types – stories of Will-o'...

November 01, 2002

Fish Tales

Something strange is going on in a shallow, marshy area of Virginia's Elizabeth River, and the Office of Naval Research is onto it. Here is a site so polluted that when the riverbed there is disturbed, oil generally bubbles up and forms a slick on the water's surface. Yet, in this foul soup there is...

March 19, 2002

Flying High

What do the hawkmoth, the fruit fly, and the bird-wrasse fish all have in common? Over millions of years, each of these animals seems to have figured out how to achieve high-lift in their respective medium…. quickly, and with more stability and less heave, pitch, yaw, torque, drag and cavitation...

February 05, 2002

From Tanks to Tumors

What does remote sensing for camouflaged enemy ground vehicles have to do with breast cancer diagnosis? By next year, perhaps plenty. Both find threats in hidden in innocent clutter. The Office of Naval Research's newly developed 200 channel hyperspectral remote sensing capability — modeled on the...

August 22, 2002