By msmash from Slashdot's closer-look department
An anonymous reader shares a report: The story of the frog's neuro-abacus is just one example of nature's vast, ancient and versatile number sense, a talent explored in detail in a recent themed issue of Philosophical Transactions of the Royal Society B, edited by Brian Butterworth, a cognitive neuroscientist at University College London, C. Randy Gallistel of Rutgers University and Giorgio Vallortigara of the University of Trento. Scientists have found that animals across the evolutionary spectrum have a keen sense of quantity, able to distinguish not just bigger from smaller or more from less, but two from four, four from ten, forty from sixty. Orb-weaving spiders, for example, keep a tally of how many silk-wrapped prey items are stashed in the "larder" segment of their web. When scientists experimentally remove the cache, the spiders will spend time searching for the stolen goods in proportion to how many separate items had been taken, rather than how big the total prey mass might have been. Small fish benefit from living in schools, and the more numerous the group, the statistically better a fish's odds of escaping predation. As a result, many shoaling fish are excellent appraisers of relative head counts.Read Replies (0)
By BeauHD from Slashdot's coordinated-efforts department
An anonymous reader quotes a report from TechCrunch: In a hearing today before the Senate Banking Committee, Securities and Exchange Commission Chairman Jay Clayton and Commodity Futures Trading Commission Chairman Christopher Giancarlo opened up about what the near-term U.S. regulatory fate of cryptocurrency might look like. In a week of plunging prices and bad news, the hearing struck a tone that coin watchers could reasonably interpret as surprisingly optimistic. Over the course of the open hearing, Clayton and Giancarlo traded testimony over what can be regulated, what should be regulated and how, while offering a broader outlook on the long-term future of virtual currency markets and blockchain tech.
The testimony drew a useful distinction among three pillars of the virtual currency ecosystem (for lack of a better unifying term): cryptocurrencies, "a replacement for dollars;" ICOs, "like a stock offering;" and distributed ledger technologies, or the technical framework generally known as blockchain. Throughout the hearing, on the SEC side, Clayton struck a relatively solemn tone focused on ICO fraud concerns, while the CFTC's Giancarlo came across as genuinely enthusiastic and curious about the emerging market. When asked about the intrinsic value of cryptocurrency, Clayton said: "There are a lot of smart people who think there's something to the value of cryptocurrency and the international exchange and I'm not seeing those benefits manifesting themselves in the market yet. I look at this from the perspective of Main Street investors and they should understand that." On ICOs as a security: "I believe every ICO I've seen is a security... You can call it a coin but if it functions as a security, it is a security... Those who engage in semantic gymnastics or elaborate re-structuring exercises in an effort to avoid having a coin be a security are squarely in the crosshairs of our enforcement provision."Read Replies (0)
By BeauHD from Slashdot's junk-news department
An anonymous reader quotes a report from The Guardian: Low-quality, extremist, sensationalist and conspiratorial news published in the U.S. was overwhelmingly consumed and shared by rightwing social network users, according to a new study from the University of Oxford. The study, from the university's "computational propaganda project", looked at the most significant sources of "junk news" shared in the three months leading up to Donald Trump's first State of the Union address this January, and tried to find out who was sharing them and why. "On Twitter, a network of Trump supporters consumes the largest volume of junk news, and junk news is the largest proportion of news links they share," the researchers concluded. On Facebook, the skew was even greater. There, "extreme hard right pages -- distinct from Republican pages -- share more junk news than all the other audiences put together." The research involved monitoring a core group of around 13,500 politically-active U.S. Twitter users, and a separate group of 48,000 public Facebook pages, to find the external websites that they were sharing.Read Replies (0)
By BeauHD from Slashdot's new-and-improved department
Apple has released new battery health features in iOS 11.3 beta 2, which was seeded to developers today. BGR reports what those battery health functions look like, and how to disable power management if you're using an older iPhone: The feature is contained within a new "Battery Health" menu, which is under the "Battery" tab on iOS 11.3. The page only really has two fields: Maximum Capacity, which shows what percentage of the original charge your battery can still hold; and Peak Performance Capacity, which tells you if your phone's performance is being throttled due to the battery. Right now, there are no options to change anything within the menu. Maximum Capacity should be at 100% for newer phones, and it should fall down to around 80% over the course of about two years of normal use. A Redditor on the iOSBeta forum uploaded a photo of his iPhone 7, which is sitting at 87% capacity. That device still shows peak performance.
On older devices with a worse battery, the phone will show that reduced Maximum Capacity, as well as detail any performance slowdowns due to the decreased battery capacity. On devices that have weaker batteries, the Peak Performance Capability will change to read "This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again." A small blue hyperlink then says "Disable," which lets you manually turn off your iPhone's performance management.Read Replies (0)
By BeauHD from Slashdot's rocket-man department
After nearly a decade of development, SpaceX's Falcon Heavy rocket has successfully launched from pad 39A at NASA's Kennedy Space Center in Florida today. After reaching orbit, the two side boosters simultaneously landed at Landing Zone One. We do not know the status of the central core of the rocket, which was destined to land on the "Of Course I Still Love You" drone ship roughly 8:19 minutes into the flight.
According to Space.com, the Falcon Heavy is the most powerful rocket to launch since NASA's Saturn V -- the iconic vessel that, with 7.5 million pounds of thrust, accomplished the definitive Apollo-era feat of putting astronauts on the moon. Elon Musk says that Falcon Heavy is "twice as powerful as any other booster operating today." As for the payload, it includes a Tesla Roadster electric car. "The Falcon Heavy will send the vehicle around the sun in an elliptical orbit that will extend farther than Mars' orbit," reports Space.com. UPDATE: SpaceX has confirmed The Verge's reporting that the middle core of SpaceX's Heavy Rocket missed the drone ship where it was supposed to land. "The center core was only able to relight one of the three engines necessary to land, and so it hit the water at 300 miles per hour," reports The Verge. "Two engines on the drone ship were taken out when it crashed, SpaceX CEO Elon Musk said in a press call after the rocket launch. It's a small hiccup in an otherwise successful first flight."Read Replies (0)
By BeauHD from Slashdot's locked-and-loaded department
On Tuesday, the review embargo lifted for full reviews of Apple's new HomePod smart speaker. The Verge's Niley Patel shared his thoughts on Apple's new HomePod in video and written form. Patel found that while it offers best-in-class sound for the price, Siri is frustratingly limited and the voice controls only work with Apple Music. Furthermore, Siri can't tell different voices apart, therefore raising some privacy concerns as anyone can come up to the speaker and ask Siri to send and read text messages and other private information aloud. Here's an excerpt from the report: The HomePod, whether Apple likes it or not, is the company's answer to the wildly popular Amazon Echo and Google Home smart speakers. Apple is very insistent that the $349 HomePod has been in development for the past six years and that it's entirely focused on sound quality, but it's entering a market where Amazon is advertising Alexa as a lovable and well-known character during the Super Bowl instead of promoting its actual features. Our shared expectations about smart speakers are beginning to settle in, and outside of engineering labs and controlled listening tests, the HomePod has to measure up. And while it's true that the HomePod sounds incredible -- it sounds far better than any other speaker in its price range -- it also demands that you live entirely inside Apple's ecosystem in a way that even Apple's other products do not. The question is: is beautiful sound quality worth locking yourself even more tightly into a walled garden? As for technical specifications, the HomePod comes in at 6.8 inches high, 5.6 inches wide, and weights 5.5 pounds. It features a high-excursion woofer with custom amplifier, array of seven horn-loaded tweeters, each with its own custom amplifier, six-microphone array, internal low-frequency calibration microphone for automatic bass correction, direct and ambient audio beamforming, and transparent studio-level dynamic processing.Read Replies (0)
By BeauHD from Slashdot's pay-discrimination department
According to a new study by Uber and Stanford economists, male Uber drivers get paid 7 percent more than their female counterparts in the U.S. "That's surprising, because Uber's driver assignments and pay are gender-blind, meaning a driver's gender isn't considered when matching riders or assigning fares," reports Recode. "Rather, pay has to do with trip length, distance and whether it's happening during surge-price hours or not." From the report: There are more male drivers -- women make up 27 percent of Uber drivers in the U.S. -- and male drivers tend to work longer hours. However, on an hourly rate, women still make less, according to the data, which measured trips by 1.8 million drivers from 2015 to 2017. According to the study, discrimination on the customer side isn't the reason for the pay gap, either. So why are female Uber drivers paid less than men? The study points to three reasons that make the gap disappear:
When and where: The times and places female Uber drivers work seem to be less profitable. That could be fewer overnight shifts, shifts with shorter wait times or surge-price shifts than men.
Driver experience: Drivers who've been with Uber longer get paid more, on account of knowing which routes and times tend to pay more. In general, men work for Uber longer than women so they are more experienced. The attrition rate after six months is 77 percent for women and 65 percent for men.
Speed: Male Uber drivers conduct more trips per hour than women, meaning they're actually driving faster, according to the data. More trips mean more money. About 50 percent of the earnings gap is explained away by differences in driving speed.Read Replies (0)
By msmash from Slashdot's horror-movie-plot department
The marbled crayfish looks much like any other freshwater crustacean. It has two claws, ten legs, and an attractive blue-brown marbled shell. Yet this six-inch creature, found in streams and lakes around the world, is far more sinister than you might expect. From a report: Its new scientific name gives a few clues: Procambarus virginalis. Every marbled crayfish, known as a marmorkreb in German, is female -- and they reproduce by cloning themselves. Frank Lyko, a biologist at the German Cancer Research Center, first heard about the marbled crayfish from a hobbyist aquarium owner, who picked up some "Texas crayfish" at a pet shop in 1995. They were strikingly large, and they laid enormous batches of eggs -- hundreds, in a single go. Soon, the New York Times reports, the hobbyist was beset with so many crayfish he was giving them away to his friends. And soon after that, marmorkrebs were showing up in pet stores upon Europe. There was something very strange about these crayfish. They were all female, and they all laid hundreds of eggs without mating. These eggs, in turn, hatched into hundreds more females -- with each one growing up fully able to reproduce by herself. In 2003, scientists sequenced their DNA and confirmed what many owners already believed to be the case: Each baby crayfish was a clone of its mother, and they were filling Europe's fishtanks at alarming speed. Just 25 years ago, the marbled crayfish did not exist at all. Now, they can be found in the wild by the millions in Germany, the Czech Republic, Hungary, Croatia, the Ukraine, Japan, and Madagascar.Read Replies (0)