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YouTube / HBO

Tonight on Vice: Greenland is Melting

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YouTube / HBO

Vice is a documentary series on HBO. It builds on the success of Vice's web presence (indeed, I've covered some of their online films before), and it employs a style of first-person journalism that's often engaging and sometimes shocking. Tonight's episode covers two topics: the melting glaciers of Greenland, and modern-day slavery in Pakistan. Here's a 40-second preview of the full episode:

Greenland is Melting

The Greenland segment attempts to put some scale to the concept of climate change. In the film, Vice co-founder Shane Smith heads to Greenland and sees firsthand what massive melting looks like. In one memorable scene, Smith stands with climatologist Jason Box, who is measuring the annual melt by burying long metal poles and returning the next year to see how much ice has melted away. As they stand there, Box explains that from last year to this year, the spot they're standing on has descended by 27 feet. Writing that, it doesn't mean much, it's just numbers. Seeing it, you get a real sense of scale—these two lonely guys on a huge sheet of ice, all of which is melting rapidly.

The Greenland segment puts out some useful facts and figures. For instance, if Greenland melts entirely, it will (by itself) account for a global sea level increase of 21 feet. That puts most major coastal cities well underwater...and it doesn't account for Antarctica, which is melting too. While alarming, the segment is not alarmist, and it's well done—gets in fast, gets the job done, and gets out of there. They make the point that while some forms of climate change benefit certain populations (increasing rainfall in an area, for instance), sea level rise helps no one. Here's a clip from the Greenland segment:

Slavery in Pakistan

The second segment of tonight's show covers a form of indentured servitude that amounts to modern-day slavery. In Pakistan, families get pulled into making mud bricks in order to pay off small debts. Predictably, the debts never go away, and the families are prevented from leaving their servitude, largely because the brickworks are located in the middle of nowhere (with no means of transportation and no place to run toward, plus no help from the police, it's a grim situation). In the segment, Vice correspondent Fazeelat Aslam travels to Pakistan and rides along with a local activist trying to free these workers. During the segment, a large family attempts to escape slavery (quite literally), and you'll have to tune in to find out what happens. Here's a clip:

When to Watch

Tonight's show debuts Friday, March 21 at 11pm on HBO. It airs again at 12:30am, and again a bunch of times over the following week on HBO and HBO2. (Basically, if you get HBO, you will be able to find an air date.) For more on Vice, check out their HBO site. You can also watch the first episode of Season 2 online for free to get a taste of what the series is like.

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technology
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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Health
One Bite From This Tick Can Make You Allergic to Meat
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iStock

We like to believe that there’s no such thing as a bad organism, that every creature must have its place in the world. But ticks are really making that difficult. As if Lyme disease wasn't bad enough, scientists say some ticks carry a pathogen that causes a sudden and dangerous allergy to meat. Yes, meat.

The Lone Star tick (Amblyomma americanum) mostly looks like your average tick, with a tiny head and a big fat behind, except the adult female has a Texas-shaped spot on its back—thus the name.

Unlike other American ticks, the Lone Star feeds on humans at every stage of its life cycle. Even the larvae want our blood. You can’t get Lyme disease from the Lone Star tick, but you can get something even more mysterious: the inability to safely consume a bacon cheeseburger.

"The weird thing about [this reaction] is it can occur within three to 10 or 12 hours, so patients have no idea what prompted their allergic reactions," allergist Ronald Saff, of the Florida State University College of Medicine, told Business Insider.

What prompted them was STARI, or southern tick-associated rash illness. People with STARI may develop a circular rash like the one commonly seen in Lyme disease. They may feel achy, fatigued, and fevered. And their next meal could make them very, very sick.

Saff now sees at least one patient per week with STARI and a sensitivity to galactose-alpha-1, 3-galactose—more commonly known as alpha-gal—a sugar molecule found in mammal tissue like pork, beef, and lamb. Several hours after eating, patients’ immune systems overreact to alpha-gal, with symptoms ranging from an itchy rash to throat swelling.

Even worse, the more times a person is bitten, the more likely it becomes that they will develop this dangerous allergy.

The tick’s range currently covers the southern, eastern, and south-central U.S., but even that is changing. "We expect with warming temperatures, the tick is going to slowly make its way northward and westward and cause more problems than they're already causing," Saff said. We've already seen that occur with the deer ticks that cause Lyme disease, and 2017 is projected to be an especially bad year.

There’s so much we don’t understand about alpha-gal sensitivity. Scientists don’t know why it happens, how to treat it, or if it's permanent. All they can do is advise us to be vigilant and follow basic tick-avoidance practices.

[h/t Business Insider]

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