walls

Video: Wi-Fi Imaging Lets You See Through Walls

Researchers use a perimeter of wireless nodes to detect moving human bodies inside buildings

SWAT teams and rescue workers may soon take advantage of wireless networks to locate people moving around inside buildings.

We previously examined this nifty wireless concept that uses off-the-shelf technology to locate humans to within 3 feet on the other side of walls. Now the researchers have released a couple of awesome videos showing the person-tracking tech in action.

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Green Dream

The Green Dream Gets Walls


I’m standing on top of the third floor after a very productive day of putting the Kama Eebs panels and the upper joists in place. When the panels arrived, we had just put them in piles all around my site so it was a bit of work just playing the find-and-seek game to get the proper panel to the correct wall location. But then it was just a matter of gluing and screwing the track into place, spraying foam onto both the shiplap joint and the track and tilting the panel into place. Once you have a tight fit, you screw the track and the shiplap joint together and move on to the next unit.

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Green Dream

Green Dream: The Walls Are Here!

The delivery of the first batch of walls sets off a flurry of activity

One of the most unique things about my green home is the walls: instead of a standard "stick-frame" construction, I'm using special insulated panels from a company called Kama-Eebs, which have all sorts of advantages in efficiency and heat retention.

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December 2009: Best of What's New

In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.

Check out the best of what's new here.

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