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What Was the Jersey Devil?

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JOHN ANGELILLO/UPI /Landov

Last night the New Jersey Devils defeated the New York Rangers to advance to the Stanley Cup Finals, where they'll face the Los Angeles Kings. In case you were wondering what exactly a New Jersey Devil is, here's a look at the legend.

As the story goes, in the early 18th century a poor woman named Mother Leeds proclaimed, “Let this one be a devil,” while giving birth to her 13th child, only to have the curse come true. The “child” emerged with hooves, leathery wings, horns, and sharp claws, killed the midwives, and began flying around wreaking havoc.

The legend has certainly had staying power. Nearly 200 years later, the Devil became a big deal again in 1909. That January, reports of odd footprints being found in the snow on the roofs of houses caused such a panic that the devil was up to no good that mills and schools closed after workers and students were too terrified to leave their homes.

Since then, the Jersey Devil has received the credit and blame for all sorts of strange happenings around the Garden State. Lose a cow? The devil probably flew off with it. Hear a weird noise? The devil, naturally. In 1960, Camden’s merchants even offered a $10,000 bounty to anyone who could capture the mischievous flying devil, but they never found any takers.

What Does the Jersey Devil Have to Do With Napoleon?

Well, nothing, really. But Napoleon had a brother who lived in New Jersey (seriously!) and Joseph Bonaparte believed he once had a run-in with the Devil.

As Bonaparte recounted the story, he was hunting alone in the woods near his estate when he saw some peculiar tracks on the ground. They looked like they belonged to a horse or a donkey, but one that was walking only on its hind legs. He followed the tracks until they ended abruptly, as if the animal had jumped into the air and flown off. He stopped and stared at them.

A strange hissing noise came from behind him. He whirled around and came face to face with an animal he had never seen before. It had a long neck, wings, legs like a crane with horse’s hooves at the end, stumpy arms with paws, and a face like a horse or a camel. He froze, and for a minute neither he nor the creature moved or even breathed. Then the Devil hissed again and flew away.

Bonaparte later told his friends what happened, and they filled him in on the local legend. Until he returned to Europe, Bonaparte is said to have kept a sharp eye out for the Devil whenever he was in the woods, hoping to kill it and take the body as a trophy.

Devils Hockey

Given that New Jersey has never been known for its mountains, the team needed a new nickname after the Colorado Rockies relocated to the Garden State in 1982. The New Jersey Sports and Exhibition Authority sponsored a statewide newspaper contest to determine the new nickname, and some of the other finalists included Americans, Blades, Coastals, Colonials, Gulls, Jaguars, Meadowlanders, and Meadowlarks. The franchise struggled in its early seasons — in 1984, Wayne Gretzky said, "They're putting a Mickey Mouse operation on the ice," and added New Jersey was "ruining hockey." But the Devils won the Stanley Cup in 1995, 2000 and 2003.

Matt Soniak and Scott Allen contributed to this story.

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iStock // Ekaterina Minaeva
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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
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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:

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Opening Ceremony

To this:

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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]

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