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A House of Puzzles

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Although Miss C. mentioned it last week, I feel that we should devote some additional space to the recent Fifth Avenue apartment that made the New York Times last week.

The long and short of it is that a family paid to have their (fabulously expensive) apartment renovated. The family wanted something special, and boy is that what they got. During the renovation, architect/designer Eric Clough embarked on a multi-year secret project to hide puzzles in the apartment, unbeknownst to the apartment's owners, and not even discovered until months after the project's completion. The project included extensive historical research, puzzles, and even a soundtrack. Here's how it started:

What Ms. Sherry didn't realize until much later was that Mr. Clough had a number of other ideas about her apartment that he didn't share with her. It began when Mr. Klinsky threw in his two cents, a vague request that a poem he had written for and about his family be lodged in a wall somewhere, Ms. Sherry said, "put in a bottle and hidden away as if it were a time capsule."

...

Before long, his firm, 212box, was knee-deep in code and cipher books, furnituremakers were devising secret compartments, and Mr. Clough's former colleague, Heather Bensko, an architectural and graphic designer who had been his best friend at the Yale School of Architecture, found herself researching the lives of 40 historical figures, starting with Francis I of France and ending with Mrs. Post.

Then things got weird, as the family's children began to notice themselves written into seemingly decorative elements within the apartment.

...one night four months later, Cavan Klinsky, who is now 11, had a friend over. The boy was lying on the floor in Cavan's bedroom, staring at dozens of letters that had been cut into the radiator grille. They seemed random — FDYDQ, for example. But all of a sudden the friend leapt up with a shriek, Ms. Sherry said, having realized that they were actually a cipher (a Caesar Shift cipher, to be precise), and that Cavan's name was the first word.

The family soon received a mysterious letter directing them to look deeper into the apartment, to discover its secrets. Through a series of eighteen clues, the family participated in an adventure in their own home, discovering the trail of secrets left for them by during the renovation. The scope and complexity of the puzzle is frankly mind-blowing:

...the finale involved, in part, removing decorative door knockers from two hallway panels, which fit together to make a crank, which in turn opened hidden panels in a credenza in the dining room, which displayed multiple keys and keyholes, which, when the correct ones were used, yielded drawers containing acrylic letters and a table-size cloth imprinted with the beginnings of a crossword puzzle, the answers to which led to one of the rectangular panels lining the tiny den, which concealed a chamfered magnetic cube, which could be used to open the 24 remaining panels, revealing, in large type, the poem written by Mr. Klinsky. (There is other stuff in there, too, but a more detailed explanation might drive a reader crazy.)

You owe it to yourself to take five minutes and read the full story. And if you have an $8.5 million apartment of your own just rusting away, why not hire Mr. Clough to add his personal touch?

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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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Nick Briggs/Comic Relief
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What Happened to Jamie and Aurelia From Love Actually?
May 26, 2017
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Nick Briggs/Comic Relief

Fans of the romantic-comedy Love Actually recently got a bonus reunion in the form of Red Nose Day Actually, a short charity special that gave audiences a peek at where their favorite characters ended up almost 15 years later.

One of the most improbable pairings from the original film was between Jamie (Colin Firth) and Aurelia (Lúcia Moniz), who fell in love despite almost no shared vocabulary. Jamie is English, and Aurelia is Portuguese, and they know just enough of each other’s native tongues for Jamie to propose and Aurelia to accept.

A decade and a half on, they have both improved their knowledge of each other’s languages—if not perfectly, in Jamie’s case. But apparently, their love is much stronger than his grasp on Portuguese grammar, because they’ve got three bilingual kids and another on the way. (And still enjoy having important romantic moments in the car.)

In 2015, Love Actually script editor Emma Freud revealed via Twitter what happened between Karen and Harry (Emma Thompson and Alan Rickman, who passed away last year). Most of the other couples get happy endings in the short—even if Hugh Grant's character hasn't gotten any better at dancing.

[h/t TV Guide]

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