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Los Angeles will be the first US city to install body scanners in the subway


Euler

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From CNN

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They scan your naturally occurring body waves looking for any indication of concealed weapons or explosive devices.

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They scan your body for objects that are blocking your naturally produced body waves. Both metallic and nonmetallic objects can be picked up by the scanner.

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No radiation is emitted and the scanners will not display anatomical details.

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Body waves, huh?

 

Is that the stuff that makes my aura glow? I'm not sure I like it if my firearm blocks my aura.

 

Or maybe they're saying the machine can detect when a firearm blocks the flow of chi between my yin and my yang. In that case, I'm concerned that the TSA is helping police look at my yang without my consent, whether or not there are any "details."

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So, are they going to be having officers at all the station to search each person that triggers the alarm? I'm guessing having a backpack on you or carrying a computer bag on your shoulder will block your "aura" from coming through. I can see this system creating a nightmare for commuters.

 

“When an object is hidden in clothing or strapped to a person, these waves are blocked and detected by the system’s software,”

 

 

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Los Angeles' public transit system has announced that it is the first in the U.S. to purchase millimeter wave scanners to screen Metro riders for suspicious objects as they move through stations.

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[T]hey do not release any form of radiation; instead, they detect radiation released by riders' bodies.

Millimeter waves are radio waves around 100 MHz. So human bodies emit radio waves? And the energy emitted is strong enough that these scanners can pick it up at a distance? At high enough resolution to form an image?

 

Am I stupid? Did NPR get it wrong? Is somebody lying?

 

I think NPR got it wrong. This SCPR article from March says it's heat.

... the scanner is calibrated to display the natural heat waves emitted by the human body without revealing too many intimate anatomical details....

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  • 2 weeks later...

... A frequency of 30 GHz has a wavelength of approximately 10 mm. A frequency of 300 GHz has a wavelength of approximately 1 mm.

Yeah, I don't know why I was off by 103 (c = l f, if l = wavelength). But still, radio frequencies aren't emitted by human bodies and don't provide sufficient resolution to image a human body with an aperture as small as their scanner.

 

I wonder if it will detect/report silicon? :drool:

Presumably you mean silicone. Silicone is so dense, everything detects it. It's even opaque to X-rays.

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