Ballistic shield made of plastic bags. Free Technical Library News

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Ballistic shield made of plastic bags

23.01.2020

The bulletproof shields used by the police certainly save lives, but they are quite heavy and bulky. The origami-inspired Swift Shield offers an alternative to the traditional one as it folds into a lightweight envelope when not needed.

The device was developed three years ago by a team from Brigham Young University in Utah and manufactured by the American company ATCS (Advanced Technology Compliant Solutions). The first version of the shield consisted of Kevlar plates that stopped bullets. The new one contains what is described as "ultra-high molecular weight polyethylene materials". The coating of these materials is a waterproof, chemically resistant and durable yet flexible shell made from hypalon. It is a kind of polyethylene. So the shield can easily be called a relative of the package.

The folding shield can be easily folded, weighs only 2,3 kg and is more like a hardcover book in dimensions. In any danger, police, military or other interested special forces can quickly deploy it into a rectangle with a handle measuring 0,6 by 0,9 m. The shield provides protection against bullets and shrapnel with an area of 0,6 square meters.

The U.S. National Institute of Justice has given the shield a Class IIIA armor rating. This means that it can stop a .357 SIG FMJ FN bullet traveling at about 448 m/s and a .44 Magnum SJHP round traveling at 436 m/s.

"The Swift Shield represents a new category in law enforcement personal protection because it's ready to be deployed and protected at any time," says Chet Linton, CEO of AEGIX Global. She will sell the product to the police force and other interested parties by becoming an ATCS reseller. "Its foldable nature allows the shield to be stored in an officer's car door, between the front seats, or in a backpack. It can be deployed on the windshield, or cover the hood of an officer's car."

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Advertising poster look counter 10.06.2007

Canadian scientists have figured out how to count the people who look at this or that advertising poster.

"For fifteen years we have been working on a device that will allow you to control a computer with your eyes as freely as a mouse. But it turned out that this technology can be used in advertising," says Roel Vertegaal, professor at Queen's University (Canada).

The device invented by him and his colleagues is a miniature camera. From a distance of 20 meters, she will see if a person is looking at her. How much attention an advertisement attracts is estimated on the Internet by the number of clicks on a banner.

In the case of other types of advertising, direct measurements are difficult. However, if you put a camera near a shield or a plasma screen that can "notice" that someone's gaze is directed at it, and even measure how long this gaze lingers on the object, then a control method will appear. Until recently, such devices were expensive and only worked at a distance of half a meter.

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