Tag Archives | Department of Defense

UT Austin Engineers Build First Nonreciprocal Acoustic Circulator: A One-Way Sound Device

The Conversation

The Conversation (Photo credit: Wikipedia) (FU)

It appears that snoops may soon have access to a powerful tool that may likely be used to abuse privacy.

via utexas

A team of researchers at The University of Texas at Austin’s Cockrell School of Engineering has built the first-ever circulator for sound. The team’s experiments successfully prove that the fundamental symmetry with which acoustic waves travel through air between two points in space (“if you can hear, you can also be heard”) can be broken by a compact and simple device.

“Using the proposed concept, we were able to create one-way communication for sound traveling through air,” said Andrea Alù, who led the project and is an associate professor and David & Doris Lybarger Endowed Faculty Fellow in the Cockrell School’s Department of Electrical and Computer Engineering. “Imagine being able to listen without having to worry about being heard in return.”

This successful experiment is described in “Sound Isolation and Giant Linear Nonreciprocity in a Compact Acoustic Circulator,” which will be featured on the cover of Science in the Jan.

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Department of Defense Fax Machine That Receives FOIA Requests is Broken

imagesLooks like someone’s getting a STAPLES gift card in his kevlar-lined stocking this Christmas.

Via MuckRock:

Starting two weeks ago, requests faxed to the Office of the Secretary of Defense (OSD) started coming back as undeliverable. After several subsequent attempts and troubleshooting on our end, MuckRock reached out to the OSD. Sure enough, their fax machine is down… possibly until November.

Now, in 2013, you wouldn’t think this would be an issue. But when an agency accepts FOIA requests by a) fax, b) mail or c) a clunky online request portal that doesn’t play nice with other systems, suddenly that fax machine becomes a technical linchpin.

It bears repeating: The office that oversees the most powerful military in history (not to mention the best-funded) is unable to project when its single fax machine will once again be operational.

The OSD’s FOIA section chief confirmed the grim news yesterday, responding that his office “will likely need to procure (purchase) a new fax machine.

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