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At the Libraries: One Pumpkin to Rule Them All

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Each week Miss Kathleen provides links to a variety of stories about libraries, authors, and books. If there’s something noteworthy going on in your local library, leave us a comment!


All hail our November Blog of the Month: Interesting Pile, a compilation of helpful links for all areas of your life. The posts might be infrequent, but there is a serious amount of info to wile away an afternoon. Enjoy!
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Halloween might be over, but I still love me some pumpkin carvings. Check out these amazing Jack-o-lanterns based on (what else?) kids books! Not so sure about the Twilight ones, but the rest are great!
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Okay, so that list was cool, but here is one photo to rule them all!
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And are you ready for some serious LOTR parodying? You...shall...not...trash!
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A truly scary headline that makes my skin crawl: Live bedbugs found in library books. Aaaaaaaiiiiiiiii!
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Here's an interesting question: Would you be turned off from reading a book if you knew it won a children's award? I know a lot of y'all love children's books, so maybe not, but publishers are betting Neil Gaiman's adult fans would be. Seems like a shame to me — give the man his props!

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Remember that kidlit parody that had everyone (including Samuel L. Jackson!) talking a few months ago? Yup, it's a trend. I think the answer is, only briefly.
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In case you have been wondering what the first ever book for children was, well, we have the answer! Long title, and it seems a bit stodgy, but hey, still pretty cool.
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Ever felt like this in your local library? I sure hope not, but it does have a kernel of truth to it, I know. Unless you've all internalized the Dewey Decimal System, like I have?
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Whoa! Lifty is a new service touting free books for online reading. They don't have every book, for sure, but there is a pretty decent collection so far. Check out the details and please let me know if you try it out!
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Have you ever wanted your very own Bookmobile? Of course you have, and now, thanks to artist Bob Staake, you can fulfill your dream. Just maybe a little smaller than you thought, but more fuel-efficient! (Thanks, Bart!)
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Thanks for reading, and don't forget to say hi in the comments! Send me an email if you have any great library news to share. I'll see you guys next week!

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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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Name the Author Based on the Character
May 23, 2017
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