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9 Things Invented For Military Use That You Now Encounter In Everyday Life

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A surprising number of military inventions have found their ways into our civilian lives. Here are just a few military-turned-everyday items.

1. GPS

When you rely on the GPS app on that Android phone to keep yourself from getting lost, you’re using the same Global Positioning System satellites set up by the U.S. Department of Defense in the early 1990s. At President Clinton’s behest, the system became available to civilian users in 1996.

2. Freeze drying

Dippin’ Dots, anyone? The technology that’s now used to make freeze-dried ice cream was first used widely during World War II as a way of preserving medical supplies that otherwise required refrigeration.

3. EpiPen

EpiPens, the auto-injecting syringes that allow you to give yourself a quick shot of epinephrine to stave off an allergic reaction, sprung from a similar device designed to protect soldiers from nerve agents and chemical weapons.

4. Cargo pants

British soldiers began sporting cargo pants in the 1930s because they offered a convenient way to carry vital military gear like ammunition. American troops adopted them just a few years later, and the general public began to wear them in the 1990s.

5. Duct tape

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In 1942, duct tape was invented for the military as a way to seal ammunition cases so that water couldn’t get in. Soldiers during WWII quickly realized that it worked well for fixing army gear, too.

6. Jerrycan

You know those canisters you use in order to get gasoline to put in your lawnmower? They were initially developed for the German military in the 1930s.

7. Jeep

The Jeep has come a long way since it was first manufactured for American troops to use on reconnaissance missions in WWII. Now celebrating its 70th anniversary, some new models of the world’s oldest SUV come equipped with luxuries such as leather-wrapped steering wheels, DVD players, and touchscreen media consoles.

8. Computers

ENIAC, the first electronic computer that was capable of being programmed to serve many different purposes, was designed for the U.S. military during WWII. The army paid for the computer to be built so they could use it in their Ballistic Research Laboratory.

9. Microwave

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In 1945, an American scientist realized accidentally that the radar transmitters used by the U.S. Army throughout WWII actually released enough heat—in the form of “microwaves”—that they could cook food. This technology was used to construct the first microwave oven within the next 2 years.

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iStock // Ekaterina Minaeva
Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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Opening Ceremony
These $425 Jeans Can Turn Into Jorts
May 19, 2017
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Opening Ceremony

Modular clothing used to consist of something simple, like a reversible jacket. Today, it’s a $425 pair of detachable jeans.

Apparel retailer Opening Ceremony recently debuted a pair of “2 in 1 Y/Project” trousers that look fairly peculiar. The legs are held to the crotch by a pair of loops, creating a disjointed C-3PO effect. Undo the loops and you can now remove the legs entirely, leaving a pair of jean shorts in their wake. The result goes from this:


Opening Ceremony

To this:


Opening Ceremony

The company also offers a slightly different cut with button tabs in black for $460. If these aren’t audacious enough for you, the Y/Project line includes jumpsuits with removable legs and garter-equipped jeans.

[h/t Mashable]