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Chris Higgins

"Breakfast on Mars," the Book Your Middle-Schooler Needs

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Chris Higgins

There's a new book by Ransom Riggs, Chris Higgins (me), and dozens of other terrific writers. It's called Breakfast on Mars, and it features essays written for students by writers who can actually make "the dreaded essay assignment" interesting. If you know a middle schooler slogging through boring essays and looking for inspiration, you need this book.

I'm particularly proud of this book because I wrote what became the title essay, "Breakfast on Mars." I was handed this assignment: write a persuasive essay (boo!) on whether we should establish a human settlement on Mars (yay!). Being a big space nerd, I called up some Mars experts, read some of the best work on that question, and wrote up the essay, arguing that we should establish a human colony. And then I went ahead and wrote the counter-argument, arguing that we should instead keep sending robots -- because, let's face it, we're really good at sending robots to Mars these days. (This second essay is also included in the book; it's called "Robots Only" and is based largely on "Fast, Cheap, and Out of Control.") At the end of the day, I think we should do both. But my hope was that, given the right topic, I could make a persuasive argument on either side. Want to find out how I did? Please buy the book. (Also be aware that the essays are about all kinds of topics; Mars is only my little corner of the subject area.)

Who Else is In It?

Here's the complete list of authors, in order of appearance. There are 38 essays in the volume:

Ransom Riggs, Kirsten Miller, Scott Westerfeld, Alan Gratz, Steve Almond, Jennifer Lou, Chris Higgins, Rita Williams-Garcia, Elizabeth Winthrop, Chris Epting, Sloane Crosley, April Sinclair, Maile Meloy, Daisy Whitney, Khalid Birdson, Sarah Prineas, Ned Vizzini, Alane Ferguson, Lise Clavel, Mary-Ann Ochota, Steve Brezenoff, Casey Scieszka, Steven Weinberg, Michael Hearst, Clay McLeod Chapman, Gigi Amateau, Laurel Snyder, Wendy Mass, Marie Rutkoski, Sarah Darer Littman, Nick Abadzis, Michael David Lukas, Léna Roy, Craig Kielburger, Joshua Mohr, Cecil Castellucci, Joe Craig, Ellen Sussman

You'll note Ransom Riggs up there at the top. Since wrapping up his daily blogging gig here at mental_floss, he's been doing pretty well for himself. His first novel Miss Peregrine's Home for Peculiar Children has sold over a million copies, and the movie adaptation is slated for release in July, 2015 -- directed by Tim Burton. (!) The sequel (Hollow City) arrives in early 2014.

I should note that Breakfast on Mars received starred reviews from both Kirkus and Publishers Weekly. I am told that this is a big deal. It also seems important to tell you that this is a charity project for the authors -- we don't get a cut of sales and received only a one-time token payment for the essays themselves. Instead of paying 37 authors piddly royalty checks, the proceeds go to Free the Children. What's not to like?

How Can I Buy It?

I'm so glad you asked. You can find it at your local book store via IndieBound. If you're more of an Amazon buyer, grab it for Kindle (under $9) or in hardcover (under $13). Dig in, everybody!

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iStock // Ekaterina Minaeva
technology
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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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Stephen Missal
crime
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New Evidence Emerges in Norway’s Most Famous Unsolved Murder Case
May 22, 2017
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A 2016 sketch by a forensic artist of the Isdal Woman
Stephen Missal

For almost 50 years, Norwegian investigators have been baffled by the case of the “Isdal Woman,” whose burned corpse was found in a valley outside the city of Bergen in 1970. Most of her face and hair had been burned off and the labels in her clothes had been removed. The police investigation eventually led to a pair of suitcases stuffed with wigs and the discovery that the woman had stayed at numerous hotels around Norway under different aliases. Still, the police eventually ruled it a suicide.

Almost five decades later, the Norwegian public broadcaster NRK has launched a new investigation into the case, working with police to help track down her identity. And it is already yielding results. The BBC reports that forensic analysis of the woman’s teeth show that she was from a region along the French-German border.

In 1970, hikers discovered the Isdal Woman’s body, burned and lying on a remote slope surrounded by an umbrella, melted plastic bottles, what may have been a passport cover, and more. Her clothes and possessions were scraped clean of any kind of identifying marks or labels. Later, the police found that she left two suitcases at the Bergen train station, containing sunglasses with her fingerprints on the lenses, a hairbrush, a prescription bottle of eczema cream, several wigs, and glasses with clear lenses. Again, all labels and other identifying marks had been removed, even from the prescription cream. A notepad found inside was filled with handwritten letters that looked like a code. A shopping bag led police to a shoe store, where, finally, an employee remembered selling rubber boots just like the ones found on the woman’s body.

Eventually, the police discovered that she had stayed in different hotels all over the country under different names, which would have required passports under several different aliases. This strongly suggests that she was a spy. Though she was both burned alive and had a stomach full of undigested sleeping pills, the police eventually ruled the death a suicide, unable to track down any evidence that they could tie to her murder.

But some of the forensic data that can help solve her case still exists. The Isdal Woman’s jaw was preserved in a forensic archive, allowing researchers from the University of Canberra in Australia to use isotopic analysis to figure out where she came from, based on the chemical traces left on her teeth while she was growing up. It’s the first time this technique has been used in a Norwegian criminal investigation.

The isotopic analysis was so effective that the researchers can tell that she probably grew up in eastern or central Europe, then moved west toward France during her adolescence, possibly just before or during World War II. Previous studies of her handwriting have indicated that she learned to write in France or in another French-speaking country.

Narrowing down the woman’s origins to such a specific region could help find someone who knew her, or reports of missing women who matched her description. The case is still a long way from solved, but the search is now much narrower than it had been in the mystery's long history.

[h/t BBC]

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