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The Missing Links: A One Man Tour of Rock Guitar History

Riffing on Rock History
In this video Alex Chadwick of the Chicago Music Exchange flies through 100 iconic guitar riffs in just over 12 minutes. It’s amazing that he can do that. And it’s amazing how many of them I knew.

100 Riffs (A Brief History of Rock N' Roll) from Chicago Music Exchange on Vimeo.

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Now, I’m No Social Media Guru, But I Think Crowdsourcing Synergy Will Send This Thing Viral on the Information Superhighway Blogosphere
I agree with most of these 15 tech terms and phrases that have run their course.

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In Some Places This Would Be A HUGE Compliment to the Chef

I’m not sure where I'd find those mythical places where belching is high praise. All I know is that they aren’t anywhere I’ve ever been. But if you happen to travel to one of them, or your 4th of July cookout is just entirely too classy and needs to be brought down a peg, this video could help.

I’m not sure this classifies as NSFW. But it certainly qualifies as STWIMNOAAYWWPCPTLTOOY (Something That, While It May Not Offend Anyone At Your Work, Will Probably Cause People To Lower Their Opinion Of You).

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Scientists Use Sound to Project Images on Screens Made of Soap Bubbles
That’s the headline of this article. I had to read it 11 times just to understand what it was saying and how and why. That’s the kind of concept that seems so incredibly confusing to figure out that typically if someone told me about that happening, I would just think they were stringing a bunch of words together to make up a nonsensical scientific concept to see if I would buy it, so they could run off and make fun of me to other people.

Guy #1: “Did you hear what we told Perkins? We actually got him to believe you could use sound waves to project images! Sound waves! What an idiot!”

Guy #2: “And tell them what you said that these “scientists” projected these sound wave images onto.”

Guy #1: “Oh yeah, it gets even better. We told him they projected them onto, wait for it, a screen made of soap bubbles.

Guy #2: “And he totally went for it!”

Crowd: “What an idiot!”

Yeah, well guess what, Group-Of-People-I-Just-Made-Up, this is real.

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Getting All Tuned Up For the Olympics. The Choral Music Olympics, That Is.
If you hate swimming and floor routines and javelins, but love the show Glee, you’ll want to skip London and head straight for Cincinnati.

Also: I know I’d be much more likely to watch the Olympics if some of these discontinued events were brought back.

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Rest in Peace, Sheriff Taylor
As you know by now, the great Andy Griffith has passed away. The AV Club rounded up 20 wonderfully irrelevant Andy Griffith Show conversations.

Original image
iStock // Ekaterina Minaeva
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technology
Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
Original image
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!

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