An anonymous reader writes "A new study by researchers in the Built Environment Research Group at the Illinois Institute of Technology shows that commercially available desktop 3D printers can have substantial emissions of potentially harmful nanosized particles in indoor air. Many desktop 3D printers rely on a process where a thermoplastic feedstock is heated, extruded through a small nozzle, and deposited onto a surface to build 3D objects. Similar processes have been shown to have significant aerosol emissions in other studies using a range of plastic feedstocks, but mostly in industrial environments. In this study, researchers measured ultrafine particle concentrations resulting from a popular commercially available desktop 3D printer using two different plastic feedstocks inside an office. Ultrafine particles (or UFPs) are small, nanosized particles less than 100 nanometers in diameter. Inhalation of UFPs may be important from a health perspective because they deposit efficiently in the lung and can even translocate to the brain. Estimates of emission rates of total UFPs in this study were high, ranging from about 20 billion particles per minute for a 3D printer utilizing a lower temperature polylactic acid (PLA) feedstock to about 200 billion particles per minute for the same type of 3D printer utilizing a higher temperature acrylonitrile butadiene styrene (ABS) feedstock. The emission rates were similar to those measured in previous studies of several other devices and indoor activities, including cooking on a gas or electric stove, burning scented candles, operating laser printers, or even burning a cigarette."
Catch up on stories from the past week (and beyond) at the Slashdot story archive
mdsolar writes "Around 2,000 people who have worked at Japan's wrecked Fukushima nuclear plant face a heightened risk of thyroid cancer, its operator said Friday. Tokyo Electric Power (TEPCO) said 1,973 people — around 10 percent of those employed in emergency crews involved in the clean-up since the meltdowns — were believed to have been exposed to enough radiation to cause potential problems. The figure is a 10-fold increase on TEPCO's previous estimate of the number of possible thyroid cancer victims and comes after the utility was told its figures were too conservative. Each worker in this group was exposed to at least 100 millisieverts of radiation, projections show."
Vigile writes "While 4K displays have been popping up all over the place recently with noticeably lower prices, one thing that kind of limits them all is a 30 Hz refresh rate panel. Sony is selling 4K consumer HDTVs for $5000 and new-comer SEIKI has a 50-in model going for under $1000 but they all share that trait — HDMI 1.4 supporting 3840x2160 at 30 Hz. The new ASUS PQ321Q monitor is a 31.5-in 4K display built on the same platform as the Sharp PN-K321 and utilizes a DisplayPort 1.2 connection capable of MST (multi-stream transport). This allows the screen to include two display heads internally, showing up as two independent monitors to some PCs that can then be merged into a single panel via AMD Eyefinity or NVIDIA Surround. Thus, with dual 1920x2160 60 Hz signals, the PQ321Q can offer 3840x2160 at 60 Hz for a much better viewing experience. PC Perspective got one of the monitors in for testing and review and found that the while there were some hurdles during initial setup (especially with NVIDIA hardware), the advantage of a higher refresh rate made the 4K resolution that much better."
An anonymous reader writes "This article is an eye opening perspective on another side effect of power generation — water usage: 'More than 40 percent of fresh water used in the United States is withdrawn to cool power plants. Renewable energy generally uses far less water, but there are glaring exceptions, such as geothermal and concentrating solar.' The article also mentions that power plants have to shut down if the incoming water is too warm to cool the plant. 'Also, even though some newer plants might use far less water, they could find that there’s far less water available as water temperatures go up and water flows go down. Another study found that nearly half of 423 U.S. plants were at risk of lower power output during droughts because their intake pipes for water were less than 3 meters below the surface.'"
RoccamOccam sends this news from the Associated Press: "A landmark federal study on hydraulic fracturing, or fracking, shows no evidence that chemicals from the natural gas drilling process moved up to contaminate drinking water aquifers at a western Pennsylvania drilling site. After a year of monitoring, the researchers found that the chemical-laced fluids used to free gas trapped deep below the surface stayed thousands of feet below the shallower areas that supply drinking water."
DavidGilbert99 writes "Microsoft took everyone by surprise last year with the Surface tablet. It was something completely new from the company everyone knew as a software company. However nine months later and the sheen has worn off the Surface tablet and Microsoft's financial results on Thursday revealed it has taken a $900 million write down on the Surface RT tablets, leading David Gilbert in IBTimes to estimate it is sitting on a stockpile of six million unsold tablets."
DeviceGuru writes with this excerpt from LinuxGizmos: "GlassUp, an Italian startup, has started taking pre-orders on Indiegogo for an Android eyewear display system billed as a simpler, lower-cost alternative to Google Glass. The GlassUp device is a receive-only Bluetooth accessory to a nearby mobile device, providing a monochrome, 320 x 240-pixel augmented reality display of incoming messages and notifications. GlassUp was unveiled at CeBit in March, and is now up for crowdfunding on Indiegogo, where pre-sales opened today ranging from $199 to $399, depending on whether it's a pre-release, pre-production, or full-production version. This is less than a quarter the price of the $1,500 Google Glass Developer Edition. Already almost two years in development, GlassUp is expected to ship to presales customers in Feb. 2014, around the same time Google Glass is expected to ship in commercial production form." And for Google Glass itself, there's at least one project to bring Google's own hardware an alternative operating system.
An anonymous reader writes "Peru is looking to provide free electricity to over 2 million of its poorest citizens by harvesting energy from the sun. Energy and Mining Minister Jorge Merino said that the National Photovoltaic Household Electrification Program will provide electricity to poor households through the installation of photovoltaic panels."
sciencehabit writes "The newest source of battery power for your cell phone is both cheap and abundant. Scientists report that microbial fuel cells using human urine can directly power a cell phone battery. However, the devices are not quite portable enough to come in handy during a marathon pub crawl. One consists of six, 4-inch-long ceramic cylinders; the other is a network of 25 smaller fuel cells borrowed from the team's waste-fueled EcoBot. And urine-powered conversations would have to be short and sweet. After 24 hours of charging, a Samsung phone stayed alive for 25 minutes—enough to send several texts and make a 6-minute, 20-second call."
Nerval's Lobster writes "BitTorrent Sync has reached its Beta milestone. The tool, which allows for secure file-syncing between devices, has been under development for quite some time: BitTorrent released a limited pre-Alpha program in January, planning to use any feedback to refine the software before release. Key features include the use of peer-to-peer technology for direct synchronization, rather than storing files in the cloud—a key differentiator from similar storage services on the market. 'It fits into our overall goal of making a better Internet using P2P,' BitTorrent Inc. told TorrentFreak when that pre-Alpha rolled out. In the intervening months, of course, former federal contractor Edward Snowden leaked a variety of top-secret documents about NSA surveillance to The Guardian, kicking off several weeks' worth of discussions and handwringing over government snooping. Several of those documents suggested that an NSA program codenamed PRISM siphoned user data from nine major technology companies, including Google and Microsoft; the named companies have stridently denied any involvement. Those revelations about the NSA—even if totally unsurprising to the paranoid—could kick off renewed interest in software tools capable of securing data against prying eyes. In other words, this could be just the moment for something like BitTorrent Sync to hit the market. 'Sync is a response to what we see as real, fundamental challenges to personal data movement: the limitations on speed, size, space, privacy, and security that come with cloud dependency,' read a July 17 note on the BitTorrent Blog."
DeviceGuru writes "Linaro has just published videos and slides from keynotes, technical presentations, and panel discussions at last week's Linaro Connect Europe 2013 event held in Dublin, Ireland. Linaro is a nonprofit organization focused on consolidating and optimizing open source software for the ARM architecture, including the GCC toolchain, the Linux kernel, ARM power management, graphics and multimedia interfaces. The conference's sessions spanned a wide range of topics, including Android, Builds and Baselines, Enterprise, Graphics and Multimedia, Linux Kernel, Network, Project Management Tools, Training, and more." The list of videos, hosted on Youtube and many with slides available.
super_rancid writes "In a 7,000 word interview with Raspberry Pi's founder posted on TuxRadar.com, Eben Upton talks about the challenges of managing such a successful project, what may be in the Raspberry Pi mark 2, and why he wishes he'd backed the Parallela Kickstarter." On interesting answer: "We were thinking of booting into Python or booting into Scratch. For younger kids, boot into Scratch. Have an environment where it’s Linux underneath, boots into Scratch and hold down a key at a particular point during boot and it doesn’t boot into Scratch it just drops into the prompt. So you can play with Scratch for six months, once you’re happy with Scratch you turn over the page and 'Hold down F1 during boot,' and it’s like 'Oh look - it’s a PC!' So I think that’s something we’d really like to do."
An anonymous reader writes "Despite backing from the Clinton Climate Initiative, and a $111 million investment from Subway Restaurant mogul Fred DeLuca, a planned city for Central Florida called 'Destiny' was doomed from the start, according to memos retrieved from Florida's Department of Community Affairs. According to state officials, despite a great deal of hype about Destiny, Florida, becoming the first fully sustainable city in the U.S., plans to build the city were rejected almost immediately due to concerns over 'possible urban sprawl, energy inefficient land use patterns, the endangerment of natural resources, and the undermining of agriculture.'"
dryriver sends this quote from Phys.org: "Harvesting waste heat from power stations and even vehicle exhaust pipes could soon provide a valuable supply of electricity. A small team of Monash University researchers ... has developed an ionic liquid-based thermocell (abstract). Thermocell technology is based on harnessing the thermal energy from the difference in temperature between two surfaces and converting that energy into electricity. The new thermocell could be used to generate electricity from low grade steam in coal fired power stations at temperatures around 130C. This would be implemented by having the steam pass over the outer surface of the hot electrode to keep it hot while the other electrode is air or water cooled."
New submitter Anita Hunt (lissnup) writes "This snooping hack-in-a-backpack could become a hot Summer accessory, since Reuters reported that 'researchers at iSec hacked into a Verizon network extender, which anyone can buy online, and turned it into a cell phone tower (video interview) small enough to fit inside a backpack capable of capturing and intercepting all calls, text messages and data sent by mobile devices within range.'"
Lasrick writes "John Mecklin explores the context that was missed when the LA Times and the San Diego Union Tribune reported on the closing of the remaining two San Onofre nuclear reactors: 'U-T San Diego published a similar flurry of well-reported stories that covered the basics of the reasons for the closure, as well as the impact on consumers, workers, and the electricity supply. At both papers, coverage included infographics that effectively explained the problem that forced the plant to close—vibration that caused wear in tubes for the plant's steam generators. (The Times's tick-tock takeout on the history of the steam generator snafu, published in July, is especially comprehensive.) The specifics of the San Onofre closing were covered well and thoroughly. The context within which those basics reside, however, was far less well-examined, and the two major newspapers closest to the San Onofre plant both therefore missed a real opportunity to inform readers about the major energy choices California and the country will need to make in the coming decade.' Excellent work at the Columbia Journalism Review."
tlhIngan writes "In an interesting move since Apple decided to partner with TSMC a few weeks ago, the Korea Economic Daily is reporting that Apple has re-signed a contract with Samsung to produce the A-series chips Apple uses to power its iPads, iPhones and iPods. TSMC is still to produce chips for Apple, though Samsung is poised to take over from 2015."
New submitter jarold writes to note that Samsung has launched two extra-large cellphones: a 6.3 inch LTE ready version, and a 5.8 inch version. "Branded as Galaxy Mega, one would struggle to fit [either in a] pocket or use it with just one hand. The good thing, it is only 8mm thin and weighs under 200 grams. More portable than a tablet, it comes with a durable polycarbonate body. Unlike most of Samsung's latest smartphones, it does not have a super AMOLED panel. Instead, it has an HD super clear LCD display, which is bright enough to please most users. It features split screen and multitasking between video and other apps." For a phone that big, users might need to brush up on their side-talking skills.
McGruber writes "Thursday, The Verge broke the news that Microsoft was slashing the price of its tablets — the price of the 32-gig Surface RT plummeted by 42%! Staples, TigerDirect and many other retailers are already selling the tablets at the lowered prices. I wonder what Microsoft will do for customers who purchased a tablet right before the price drop?"