Samsung Galaxy Note 8 Not DIY FriendlyFactory That Made Exploding Galaxy Note 7 Batteries Catches Fire Stay on target Ever wonder what happened to all those Samsung Galaxy Note 7 smartphones recalled last year after they began exploding?Some found a new life as refurbished handsets offered for rental. Others, it appears, were reborn as the Galaxy Note 7 Fan Edition.Teardown experts iFixit got their hands on the new device—only 400,000 of which are on sale, exclusively in South Korea.“And in case you were wondering—no, there isn’t a tiny fan in there to help prevent battery fires. (We checked.)” iFixit wrote in a blog post.There are, however, subtle differences between the new Fan Edition and its combustible predecessor.“At first glance, it seems like nothing has changed,” the company reported.That is, until you pry off the “nasty glass panel” and take a closer look at the restored hardware: Inside is a new, albeit smaller, battery. Clocking in at 3,200mAh (versus the original Note 7’s 3,500mAh), the petite power source is apparently enough to make the phone safe again.New Fan Edition battery (left) weighs in just under the original power source (right) (via iFixit)The only other hardware disparity is a revamped antenna pattern—likely intended for compatibility with Korean cellular networks.“The Fan Edition inherits just about everything else from the Note 7, including its repairability score,” according to iFixit, which awarded Samsung’s latest gadget a measly four-out-of-10 rating.While many components are modular and can be easily replaced, that pesky battery remains barricaded behind a glued-on rear panel.“No easy pull-to-remove adhesive tabs in sight—which feels like a misstep,” iFixit’s Sam Lionheart wrote in the blog. “A non-removable battery made the Note 7 recall particularly messy. So, why double down and lacquer your replacement battery into the phone again?”Plus, front and back glass “make for double the crackability,” the teardown said.But unless you’re thinking of moving to Korea, there is little chance US consumers will ever get their hands on the Galaxy Note Fan Edition, available in black onyx, blue coral, gold platinum, and silver titanium for about $615.Let us know what you like about Geek by taking our survey.
The nautilus is a weird-looking creature, and a relic of an ancient era of life. But how it gets around has baffled scientists for years. That’s because, unlike many of the aquatic life we are familiar with, the chambered nautilus uses a jet to move through the water. This is notoriously inefficient. Squids and the like are light and can use their tentacles to help guide themselves, but even they waste a lot of energy moving around.Scientists, baffled by how the much heavier and bulkier nautilus swam, started to study the exact process the crustacean uses.Their findings, Published in Royal Society Open Science, were shocking, demonstrating that the critters might be the most efficient jet engine nature has ever produced.The study started by filling a tank with bright, floating flecks of aluminum oxide. Then, they’d add five nautiluses to the tank to observe their movements and how they affected the particles around them. With an advanced system of high-speed cameras and lasers, plus software that could analyze the movement patterns of the particles, the researchers tracked the animals’ method of sucking in water and then jetting it back out. When they ran the numbers, the team found that up to 75% of the energy was transferred to the water and used to propel the creatures.“Squid, they tend to be about 40 to 50 percent efficient,” Graham Askew, a biomechanics professor at the University of Leeds told the New York Times.The issue at hand is that moving water very slowly, like with fins, and requires a lot less effort. That comes from the equations for calculating kinetic energy. Because the total energy is calculated by multiplying velocity-squared by the mass of the thing being moved, you have to commit quite of bit of energy to increase the speed of the water you’re moving, and you don’t get that much extra push out of it.Exactly how the nautilus does this isn’t totally clear. But according to the data, some of it comes from the fact that the creatures suck in water slowly and then allow the fluid to seep out at times, only using the more aggressive movement when they are in trouble.For now, though, Dr. Askew have turned their attention cuttlefish, another creature that uses jets for propulsion. Let us know what you like about Geek by taking our survey.