26.jpg

New geographical technology

We asked experts about how these advances might help firefighters deal with challenging, wind-driven wildfires like the fatal blaze in Yarnell Hill, Arizona. (Related: "Who Are the Hotshots? A Wildland Firefighting Primer.")

Better Fire Shelters

When trapped by the fire, some of the Arizona firefighters who died were forced to deploy tent-like, foil-covered structures as a last—and ultimately futile—attempt at survival.

All federal, state, and local wildland firefighters are required to carry these so-called fire shelters while battling federal fires. The fire shelters are meant as a last line of defense when facing a fire entrapment, to be used only when there are no other options. (Watch a video of fighting wildfires.)

The U.S. Forest Service (USFS) began distributing the newest generation of fire shelters in 2003. This latest version consists of an outside layer made of high-temperature resistant silica cloth and an inside layer composed of a lightweight, fiberglass scrim cloth. Both layers are laminated to aluminum foil, which is an excellent reflector of radiant heat.

The aluminum foil is "designed to slow heat transfer from the outside to the inside of the shelter, " explained Tony Petrilli, project leader for the USFS Technology Program, at a press conference on Monday.

As a result, Petrilli added, current fire shelters work really well against radiant heat. But they're challenged if they come into contact with direct flames.

Flames "break down the glue much quicker than in a radiant environment, " Petrilli explained. "And when you lose that aluminum foil as your barrier, it's easier for the heat to enter into the fire shelter."

"It would keep that aluminum foil in place longer, and keep it better sealed for a longer amount of time, " Petrilli said.

Improved Wind Models

To better combat these kinds of fires, researchers are developing computer models to simulate how wind moves across the landscape.

"Computationally, it's a pretty complex and intensive problem. This is basically like fluid dynamics. You have a wind stream going across topography in three dimensions."

But thanks largely to improved modeling software, scientists can now predict wind motion on ever smaller scales. Whereas the grid cells in simulations used to be about half a mile to six miles (one to ten kilometers) on a side, they are now much smaller—in some micro-scale models, only a few hundred meters on a side.

"The technology is improving to the point where we can actually model fairly fine-scale wind patterns, and that's important for fires because fires respond very strongly to wind, " Moritz said.

You might also like
How to Focus Your Mind and Achieve ANY goal (
How to Focus Your Mind and Achieve ANY goal (www ...
Ph.Diva and the Mystery Band - Animation of Life in the
Ph.Diva and the Mystery Band - Animation of Life in the ...

Anything new about stirling engines in Cal?

Looking for an update. Everything I find from google news is almost a year old. This is from the stirling engine deal with Southern Edison to build a 500MW plant outside of LA.
What geographical areas are best suited for a solar dish farm?
The southwest region of the United States is ideally suited for this. In fact, a solar farm 100 miles by 100 miles could satisfy 100% of the America’s annual electrical needs. Solar technology primarily addresses the peak power demands facing utility companies in the Southwest U.S. and other solar-rich areas.

Depends

by tlbrink

The cost of living and job markets are better than the national average, but the best job strategy is not to go for averages, but look at your specific skills and experiences, figure out which careers that relates to, and then go to that geographical area:
technology - Silicon Valley
finance - New York
There are other factors to consider. How important are mountains? the ocean? good weather? I have met many midwesterners in Acapulco during the winter, and none ever told me
"I got to get back to Omaha. I just miss those snow covered plains."

4,000 Year Old Greenlander

by BurpBoohickie

WASHINGTON (Reuters) – Scientists have sequenced the DNA from four frozen hairs of a Greenlander who died 4,000 years ago in a study they say takes genetic technology into several new realms.
Surprisingly, the long-dead man appears to have originated in Siberia and is unrelated to modern Greenlanders, Morten Rasmussen of the University of Copenhagen and colleagues found.
"This provides evidence for a migration from Siberia into the New World some 5,500 years ago, independent of that giving rise to the modern Native Americans and Inuit," the researchers wrote in Thursday's issue of the journal Nature

The University of North Carolina Press The North Carolina Atlas: Portrait for a New Century
Book (The University of North Carolina Press)
  • Used Book in Good Condition

Solar study: U of M students seek state's sunniest places  — Rick Kupchella's BringMeTheNews
The students are using geographic information systems technology and Lidar data, which is 3D aerial imaging of the Earth's surface, gathered by aircraft with laser-based technology, the students note in a 10-minute video that explains the project (below).

University of Chicago Press The Mapping of New Spain: Indigenous Cartography and the Maps of the Relaciones Geograficas
Book (University of Chicago Press)
Grove Press Neutral Buoyancy: Adventures in a Liquid World
Book (Grove Press)
  • Used Book in Good Condition
WallMonkeys.com Show Wall Decals Billabong Pro Tahiti 2004 - 18 inches x 13 inches - Peel and Stick Removable Graphic
Home (WallMonkeys.com)
  • Easy to install, simply peel & stick!
  • Available in a variety of sizes.
  • Fast delivery, printed on demand just for you.
  • Paint-safe self-adhesive. Sticks to any smooth surface.
  • Repositionable. Can be moved again and again.
Mohu Mohu Leaf Paper-Thin Indoor HDTV Antenna - Made in USA
Home Theater (Mohu)
  • Designed and Manufactured in USA with a 1-year Limited Warranty
  • The Original Paper-Thin Indoor antenna
  • Based on discrete mudflap antenna designed for the U.S. Military
  • Reversible and paintable to match decor
  • 30-mile range, includes 10 ft. High Performance Cable
Related Posts