The average city street these days sports quite a number of people gazing down into their phones as they walk, unable to tear their eyes from a text or email, or gabbing away to their second cousin while checking their manicure. If you are among those who prefer to walk upright, watching for oncoming semis, you may have noticed that these people don’t look at walk signals to tell when to cross; instead, they wait until their peripheral vision picks up a phoneless pedestrian making a move for it. I am frequently in that pedestrian, and am not above making occasional false starts to watch people jerk like fish on a line. Sorry, folks.
The app, called WalkSafe, uses the phone’s built-in camera to watch traffic and apply vision learning algorithms to identify car-like objects, going on to identify the object’s direction of movement and current speed. It can pick up cars as far away as 160 feet, and if the vehicle is moving at more than 30 mph, the phone will ring and buzz in warning.
However, the camera on the front of the phone does have to be facing traffic. If you’re gazing down into your screen to trade lulz with your bestie, even WalkSafe can’t save you.
Leonardo da Vinci’s “The Last Supper” has survived since the late 1400s on a wall in the Santa Maria delle Grazie Church in Milan, weathering centuries of change and intrigue, such as a World War II bombing. Worried about soiling from air pollution in the city, one of Western Europe’s most heavily polluted, curators installed a ventilation and filtration system to protect it in 2009. The system worked well at reducing levels of fine and coarse particulate matter within the church (according to a new study), which should save the painting from worst effects of air pollution.But a significant threat remains: fatty lipids and organic compounds, such as those emitted from the skin of the 1,000 people that visit the painting each day.
Cranky flightless birds and their green porcine enemies are on every screen these days. But despite the game’s apparent simplicity, it pays to have an expert unpack the fundamental physics of the Angry Birds universe (better gameplay through physics, and all that). That expert is physics prof and graph maker extraordinaire Rhett Allain, whose rationale is summed up thusly in his first Angry Birds post:
But what about the physics? Do the birds have a constant vertical acceleration? Do they have constant horizontal velocity? Let’s find out, shall we? Oh, why would I do this? Why can’t I just play the dumb game and move on. That is not how I roll. I will analyze this, and you can’t stop me.
His latest offering over at Wired delves into what, exactly, is up with those yellow birds, which you can use to smash the piggies’ wooden structures. Turns out they have some iiiinteresting acceleration properties it would behoove you to grok…dig out your high school calculus and check it out.
“Curiosity is inherited with mankind. Frequently we want to know something only because it needs to be kept secret.” Astute psychology on the part of this secret society scribe.
With the most powerful computers ever known <insert maniacal laugh>, you’d think that modern codebreakers would have utterly smashed our forefathers’ puny ciphers. Well…no. There are quite a number of antique documents that remain mysterious, despite cryptologists’ best efforts. Code breaking still relies on good guesses and flashes of insight more than brute force.
Just chillin’…before tearing off at incredible speed.
What’s black, spherical, and can run you down at 40 mph? Japan’s mini Death Star, of course.
The hovering drone was demonstrated at a tech expo in Japan recently, zipping around like a hummingbird and showing off its stability, which is maintained by three gyroscopes. Even if it hits a wall or is whacked by a bystander, the thing hardly pauses.
The drone’s possible uses include reconnaissance and rescue, the presenter for the Defense Ministry remarked. The whole thing weighs just 350 grams and was built from commercially available parts at a cost of about $1400.
You heard me—commercially available parts. So what are you waiting for?
Those classy folks at the Annals of Improbable Research are at it again. Last night, they announced the 2011 winners of some of the most coveted awards in science: the Ig Nobels.
First off, in Physiology…from the Cold-Blooded Cognition Lab at the University of Vienna, Anna Wilkinson, Natalie Sebanz, Isabella Mandle, and Ludwig Huber for their paper No Evidence of Contagious Yawning in the Red-Footed Tortoise, published this year in Current Zoology. As it turns out, if one tortoise is yawning, its buddies won’t join in. Not even if you show them movies of yawning tortoises.
In Chemistry…Makoto Imai, Naoki Urushihata, Hideki Tanemura, Yukinobu Tajima, Hideaki Goto, Koichiro Mizoguchi and Junichi Murakami for determining what concentration of airborne wasabi can awaken sleeping people in case of emergency. They are the inventors of the wasabi alarm, described in US patent application 2010/0308995 A1.
Swimming through a sea of wireless radio waves is de rigeur these days (in fact, you have to move to West Virginia if you think you’re allergic to them). But your body leaves a wake in that sea, and watching it can let observers count your breaths per minute, says a researcher who surrounded himself with twenty wireless units to test the idea. Cute, right? But it also means someone on the sidewalk can tell from disturbances in the wireless where you are in your house, and track you as you move from room to room. A little less cute.
If you swallowed pony beads when you were a kid, you are not alone. So many teeny plastic dooboppies are just crying out to be ingested…and frankly, doctors are tired of all those irresponsible designs. After finding a bread clip in the colon of a patient, several docs have outlined the clips’ “evolutionary heritage” and “species” classification in a new article in BMJ Case Reports, in hopes of prompting someone, anyone, to make one that isn’t the perfect shape for lodging in the digestive nether regions.
The researchers, drawing on several members’ longstanding membership in the illustrious Holotypic Occlupanid Research Group, have given each type of bread clip a handy-dandy Latin name. The bread clip genus (?) is Occlupanidae, presumably for its occluding capabilities, while the species names refer to the relative toothiness—one-toothed, two-toothed, etc.—of the types. They also provide a detailed phylogenetic chart showing the evolution from the smooth proto-bread clip to the many-tined versions adorning our bags today. (more…)
Making a living as a writer is tough, but if you can drink your words, everything will start looking up. A maker going by the handle Morskoiboy has built a typewriter with syringes for keys that does just that: each syringe sucks up a different fluid for each letter, runs the fluid through a microfluidic-style screen to display the letter, then drains the fluid, which can be any booze or mixer you like, into a glass.
That’s walking dangerously—better slip on your flip-flops to avoid the cops.
Your walk is surprisingly distinctive, and it’s not just the way you waggle your fanny: it’s how your feet touch the ground. Just a few steps is enough for a program to recognize you 99% of the time, report scientists who had more than a hundred people leave their prints on sensors. The goal? Identifying people through carpet, of course. In case you can’t get to their fingerprints or retinas and so on.
Discoblog is DISCOVER's compendium of quirky, funny, and surprising science news from the edge of the known universe. It's written by Veronique Greenwood and Valerie Ross. Email tips and suggestions to vgreenwood [at] discovermagazine [dot] com.
