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Are You Afraid of the Park? Ghosts, Conspiracies and Other Weird Happenings in Central Park

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For a while, Central Park, the 770-acre green oasis in the middle of Manhattan, wasn’t considered a place you really wanted to go. In the early 1980s, there were 1,000+ crimes of various types committed in the park every year, but muggers and vandals aren’t the only creeps that have run rampant there. From its opening in 1857 through today, the park has played host to all sorts of scary things going bump in the night.

A Secret and a Mysterious Death
The weirdness starts at the very beginning with Calvert Vaux, co-designer of the park.

If a letter apparently written by Vaux in 1895 is to be believed, he possessed knowledge of a secret of historical importance hidden in the park, as well as a set of papers that could aid in discovering that secret when deciphered. Vaux said in the letter that there were those who wished for the secret to remain hidden and that he feared for his life. He was found drowned in Brooklyn’s Gravesend Bay two months later. Vaux wanted other people to be aware of the secret in the park and the distribution of the “Central Park Papers” is currently administered by David Wise, who sells copies of them through his website.

Are the letter and the secret real, or this is an elaborate game? No one knows, as those who have purchased the papers and discovered the secret are bound by a contract that requires them to fulfill Vaux’s wish to keep their discovery confidential. If you’re in New York, you’ll just have to figure out the truth for yourself.

The Monsters take Manhattan
Over an entrance to Belvedere Castle is a cockatrice, a legendary creature resembling an oversized rooster with a reptilian tail, designed by sculptor Jacob Wrey Mould. While these legendary beasts haven’t been found in the castle, New York City or anywhere else in the world, the park does have it’s share of monsters.


Nick Redfern, author of several books on the paranormal, tells a story about a strange, bipedal humanoid creature spotted at the edge of the park. The thing was covered with rust-colored hair and stood no more than three feet tall. One eyewitness claims the creature charged at him, stopped, stared right into his eyes for several seconds and then disappeared under a bridge.

Not all the park’s monsters are mythical, though. There have been several alligator sightings in and around the park dating back to at least the 1930s, when the New York Times reported that police were searching for a “swarm” of gators seen by two children. In 2007, as part of a restoration project, the park’s lake was dredged and a three-foot-long koi carp and a few 50lb snapping turtles were discovered.

If there's something strange in your neighborhood...
The Dakota building, located at Central Park West at 72nd St., was named such because when it was first built in the 1880s, the Upper West Side was still “rural” and referred to as “The Dakota Territory.” The Dakota is where Rosemary gave birth to the Antichrist and has been called home by horror master Boris Karloff and at least three ghosts. The first is that of a little boy, first seen by construction workers during a renovation in the early 60s. A few years later, the second ghost, girl dressed in early 20th clothing, was reportedly seen by painters a few years later. Both of these apparitions have made several appearances since then, but no clues as to their identities or reasons for haunting the building are available. The final ghost spotted around the Dakota is that of John Lennon, who lived there for a time and was murdered outside building in 1980. Several people have claimed to see his figure near one of the gated entrances to the park.

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iStock // Ekaterina Minaeva
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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
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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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iStock
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Why Your iPhone Doesn't Always Show You the 'Decline Call' Button
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iStock

When you get an incoming call to your iPhone, the options that light up your screen aren't always the same. Sometimes you have the option to decline a call, and sometimes you only see a slider that allows you to answer, without an option to send the caller straight to voicemail. Why the difference?

A while back, Business Insider tracked down the answer to this conundrum of modern communication, and the answer turns out to be fairly simple.

If you get a call while your phone is locked, you’ll see the "slide to answer" button. In order to decline the call, you have to double-tap the power button on the top of the phone.

If your phone is unlocked, however, the screen that appears during an incoming call is different. You’ll see the two buttons, "accept" or "decline."

Either way, you get the options to set a reminder to call that person back or to immediately send them a text message. ("Dad, stop calling me at work, it’s 9 a.m.!")

[h/t Business Insider]

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