An anonymous reader quotes a report from Science Daily: Data from more than 17,000 teenagers show little evidence of a relationship between screen time and well-being in adolescents. The study, published in Psychological Science, a journal of the Association for Psychological Science, casts doubt on the widely accepted notion that spending time online, gaming, or watching TV, especially before bedtime, can damage young people's mental health. The research found that adolescents' total screen time per day had little impact on their mental health, both on weekends and weekdays. It also found that the use of digital screens 2 hours, 1 hour, or 30 minutes before bedtime didn't have clear associations with decreases in adolescent well-being, even though this is often taken as a fact by media reports and public debates.

Unlike other studies, the Oxford research analyzed data from Ireland, the US, and the UK to support its conclusions. The researchers used a rigorous methodology to gather how much time an adolescent spends on screens per day, including both self-reported measures and time-use diaries. This is important as many studies are based solely on self-reported digital technology use, even though recent work found only one third of participants give accurate accounts of how much time they spend online when asked after the fact. The researchers were also able to create a comprehensive picture of teens' well-being, examining measures of psychosocial functioning, depression symptoms, self-esteem, and mood, with data provided by both young people and their caregivers. Additionally, the final of the three studies conducted was preregistered, meaning that the researchers publicly documented the analyses they would run before they analyzed the data. This prevents hypothesizing after the results are known, a challenge for controversial research topics.

Samsung Electronics has started mass-producing its 5G chips, the company said. From a report: Among the company's new chip offerings is the Exynos Modem 5100, which contains a 5G multi-mode chipset; it is the same chipset that is used to power the Galaxy S10 5G, which became available for sale in South Korea as of Wednesday. The model, unveiled in August, is the world's first 5G modem to be compatible with the 3GPP's 5G New Radio (5G-NR) standard. Mass production for its single-chip radio frequency transceiver, the Exynos RF 5500, and supply modulator solution, the Exynos SM 5800, have also started, Samsung said. These technologies also power Samsung's flagship 5G phone. The Exynos RF 5500 has 14 receiver paths for download, 4x4 MIMO (Multiple-Input, Multiple-Output), and a higher-order 256 QAM (Quadrature Amplitude Modulation) scheme for data transfer in 5G networks; and the Eyxnos SM5800 is 30% more power efficient than previous offerings.

The updated fifth-generation iPad mini has been torn apart by iFixit, revealing an "amalgamation of components and designs from other iPads -- the internals of a previous iPad mini, the camera system of an iPad Pro, and the exterior design of an iPad Air," reports Ars Technica. From the report: iFixit has published its teardown of the new, fifth-generation iPad mini -- the first update to Apple's smaller-sized tablet since 2015. The iFixit team -- which sells gear for repairing and servicing gadgets and uses these teardown series to promote said gearâ"noted that the iPad mini looks on the outside like a smaller version of the new iPad Air. But on the inside, it's an updated iPad mini 4, the team wrote.

On opening the tablet up, iFixit discovered a 19.32Wh battery -- the same capacity as the previous-generation iPad mini. But there are some notable changes. The front-facing camera module has been updated to a 7-megapixel Æ'/2.2, like the 10.5-inch iPad Pro. That's a marked improvement over the iPad mini 4. There's also Apple's A12 Bionic system-on-a-chip (the same found in the iPhone XS, XS Max, and XR) with 3GB of LPDDR4X DRAM. The updated microphone array has been moved near the selfie cam, and new ambient light sensors support the True Tone feature, which adjusts the white balance of the display based on ambient light conditions for user comfort. The repair site gave the 2019 iPad mini a score of two out of 10 for repairability. "The only positive cited was that a single Phillips screwdriver can deal with all the screws in the device," Ars reports. "However, replacing the battery is 'unnecessarily difficult,' there's adhesive everywhere, and removing the home button (no small feat) is required in order to replace the screen."

At its Data-Centric Innovation Day, Intel today announced its Cascade Lake line of Xeon Scalable data center processors. From a report: The second-generation lineup of Xeon Scalable processors comes in 53 flavors that span up to 56 cores and 12 memory channels per chip, but as a reminder that Intel company is briskly expanding beyond "just" processors, the company also announced the final arrival of its Optane DC Persistent Memory DIMMs along with a range of new data center SSDs, Ethernet controllers, 10nm Agilex FPGAs, and Xeon D processors. This broad spectrum of products leverages Intel's overwhelming presence in the data center, it currently occupies ~95% of the worlds server sockets, as a springboard to chew into other markets, including its new assault on the memory space with the Optane DC Persistent Memory DIMMs. The long-awaited DIMMs open a new market for Intel and have the potential to disrupt the entire memory hierarchy, but also serve as a potentially key component that can help the company fend off AMD's coming 7nm EPYC Rome processors.

Apple has released the fifth-generation iPad Mini. So, of course, the repair experts at iFixit needed to tear it apart. From a report: The new 7.9 inch tablet, launched two weeks ago, sticks to its roots as a revamp of the iPad Mini 4, according to iFixit's teardown published Tuesday. One notable change is the battery connector design, which could prevent people trying to fix a device from accidentally killing the backlight during a repair, according to iFixit. The iFixit team calls this tweak "nifty!"

iFixit also noted that both the screen and battery are difficult to remove. The removal of the display, in particular, if not done carefully, could compromise the Touch ID technology. "Battery and screen replacements are the two most common repairs, and the iPad Mini makes both unnecessarily difficult," iFixit said. "The battery lacks pull-to-remove adhesive tabs, and the display requires a tricky removal of the home button if you want to keep Touch ID after your repair."

The Norwegian Road Federation (NRF) said on Monday that almost 60 percent of all new cars sold in the country last month were fully electric, "a global record as the country seeks to end fossil-fueled vehicles sales by 2025," reports Reuters. From the report: Exempting battery engines from taxes imposed on diesel and petrol cars has upended Norway's auto market, elevating brands like Tesla and Nissan, with its Leaf model, while hurting sales of Toyota, Daimler and others. In 2018, Norway's fully electric car sales rose to a record 31.2 percent market share from 20.8 percent in 2017, far ahead of any other nation, and buyers had to wait as producers struggled to keep up with demand.

The surge of electric cars to a 58.4 percent market share in March came as Tesla ramped up delivery of its mid-sized Model 3, which retails from 442,000 crowns ($51,400), while Audi began deliveries of its 652,000-crowns e-tron sports utility vehicle. The sales figures consolidate Norway's global lead in electric car sales per capita, part of an attempt by Western Europe's biggest producer of oil and gas to transform to a greener economy.

In addition to shutting down Google+, Google URL Shortener, and Inbox by Gmail this week, the company has stopped selling its Pixel 2 and Pixel 2 XL smartphones through its online store, which means whatever remaining stock at other retailers will likely be extremely limited. It also means that the $799 Pixel 3 is now the cheapest phone Google sells. PCWorld summarizes the other three products coming to an end this week: Inbox by Gmail: When the Inbox by Gmail app launched in 2015, it was a revelation. A completely new way to view and organize your messages, Inbox boiled your emails down to a smart task manager, with bundles, pins, scheduling, and shortcuts that made managing your inbox a breeze. But over the years, Google's interest in Inbox faded, and it never really got the attention it deserved. Most of its unique features are now part of the Gmail app (though we're still waiting for bundles), and several third-party apps have adopted Inbox's style. Apparently that's good enough for Google, because as of this week you won't be able to use it anymore.

Google URL Shortener (goo.gl): Back in 2009, link shortening was still a novel idea, and Google was one of the first to bring the concept to the masses with the Google URL Shortener. It was a simple way to turn a lengthy web address into a short one that consisted of goo.gl and a short string of letter and numbers. With the rise of bit.ly and similar services, Google's own URL shortener became less important to people's work flow and now, nearly 10 years later, it's gone for good.

Google+: Google+ was once supposed to be the one-stop shop for social and support among Google users, but it never really caught on. And then it was revealed that some 50 million users may have had their name, email address, occupation, and age exposed to third-party developers, which accelerated its demise. Now it's going away for good, but we can't imagine that anyone will actually notice.

Technology writer Tom Chanter explores the life story of venture capitalist Marc Andreessen to ask whether software will not only eat the world, but also the jobs of what one historian predicts will be a "massive new unworking class: people devoid of any economic, political or even artistic value." Can Marc Andreessen prevent a so-called "useless class" who "will not merely be unemployed -- it will be unemployable"?

Andreessen grew up in New Lisbon, Wisconsin (population: 1,500), and taught himself the BASIC programming language at age 8. He co-developed the original Mosaic web browser before he'd graduated from college, went on to co-found Netscape, and by age 23 was worth $53 million. He then transformed into a "super angel" investor in companies like Twitter, Airbnb, Lyft, Facebook, Skype, and GitHub. "Having been an innovator in the tech start-up game, Andreessen is now an innovator in the tech venture capital game," writes Chanter. "He is a jedi that has become the master." In 2011, Marc Andreessen published an article in the Wall Street Journal titled, Why Software Is Eating The World. He wrote, "Over the next 10 years, the battles between incumbents and software-powered insurgents will be epic...." 7 years later, it's clear Andreessen was correct. Lyft has destroyed taxi jobs. Airbnb has destroyed hotel jobs. Amazon destroyed independent bookstores. How does Andreessen feel about that? "Screw the independent bookstores," he said in his New Yorker profile. "There weren't any near where I grew up. There were only ones in college towns. The rest of us could go pound sand."
But the 4,900-word article also notes Andreessen's pledge to give half his income to charitable causes -- and his observation in a 2015 interview that outside of the United States, global income inequality is falling, not rising. "He has seen technology transform his own life, and has seen how technology has bridged the global wealth gap. Why shouldn't he be optimistic about the future of America's working class?"

And Andreessen's ultimate answer to the jobs destroyed by technology may be Udacity. The article cites Andreessen's investment in the company in 2012, and points to the online education platform's hopeful mission statement. "Virtually anyone on the planet with an internet connection and a commitment to self-empowerment through learning can come to Udacity, master a suite of job-ready skills, and pursue rewarding employment."

As a boy in Wisconsin he was starved for information. He has created an education institution accessible from Wisconsin to Africa. As a boy in Wisconsin he was starved for connection. He has married an innovative philanthropist and author, Laura Arrillaga-Andreessen. They have a son named John. Andreessen is optimistic for both the working class and the future tech elite.

In his New Yorker profile he says of his son, "He'll come of age in a world where ten or a hundred times more people will be able to contribute in science and medicine and the arts, a more peaceful and prosperous world."

He added, tongue in cheek, "I'm going to teach him how to take over that world!"

An anonymous reader quotes a report from Electrek: Florida Power & Light has joined the race to build the world's largest solar battery storage system, announcing plans for its massive Manatee Energy Storage Center. The utility plans to build a 409 MW/900 MWh battery, to be powered by an existing FPL solar plant in Manatee County, Florida. It will begin serving customers in 2021. FPL says the battery system will be able to power 329,000 homes for two hours. For comparison, FPL notes the battery system is equivalent to 100 million iPhone batteries, or 300 million AA batteries. The system will be used in periods of high demand. The utility company also said that it will accelerate the retirement of two natural gas facilities at a nearby power plant. "FPL says the project will save customers more than $100 million while eliminating more than 1 million tons of carbon emissions, though no cost estimates for the project were disclosed," reports Electrek.

And while the Manatee Energy Storage Center is projected to be the "world's largest solar-powered battery storage system," it will have some competition from Texas where there are plans to build a 495 MW battery storage system that would be paired with an equivalent 495 MW solar farm in Borden County, Texas. It too is due to come online in 2021.

After partnering with HTC to launch the Vive in 2016, Valve has moved ahead with plans to launch its own headset, called the Valve Index, in May 2019. Ars Technica reports: The news came on Friday in the form of a single teaser image, shown above, of a headset with the phrase "Valve Index" written on its front. The front of the headset is flanked by at least two sensors. This shadow-covered hardware matches the leaked headset reported by UploadVR in November of last year. That report hinted to Valve's headset supporting a wider, 135-degree field-of-view (FOV), as opposed to the roughly 110-degree FOV of the original HTC Vive and Oculus Rift.

Valve's dedicated website for the new device includes no other information than the above image and the date "May 2019." It does not include any mention of the new SteamVR Knuckles controllers, which Valve has advertised pretty heavily via developer outreach since their 2016 reveal and a later series of improved prototypes in 2018. This page also doesn't mention a series of three Valve-produced VR games that have been repeatedly advertised by Valve co-founder Gabe Newell since 2017. There's very little information about the headset, but after cranking up the brightness and contrast of the teaser image, Ars Technica's Sam Machkovech was able to find "a series of six dots on one of the headset's surfaces, [...] which may hint to this headset's use of an outside tracking sensor, a la the HTC Vive's infrared trackers." He adds: "Even so, those two giant lenses imply that 'inside-out' tracking, managed entirely by the headset without any extra webcams or sensors, may also be in the cards. Additionally, we can see a giant physical slider, which is likely linked to interpupillary distance (IPD), a precise measurement needed to ensure maximum VR comfort."

After tearing apart Apple's new second-generation AirPods, the repair guide site found that there is no practical way to service or repair them even at a professional shop. They labeled them as "disappointingly disposable." Ars Technica reports: iFixit had to go to almost comical lengths to open the AirPods up, and despite their expertise and tools, the iFixit team was unable to do so without permanently damaging the product. [...] That's disappointing, given that the batteries in the AirPods won't last longer than a few years with heavy use, and they're hard to recycle. Apple does offer to recycle headphones through partners as part of its Apple GiveBack program, but the GiveBack Web portal does not offer a product-specific category for AirPods to consumers like it does with most other Apple products. Consumers may simply select a general "headphones & speakers" category on the site.

The teardown also revealed some differences from the first-generation AirPods. The battery is the same size, but iFixit identified the new, Bluetooth 5-ready H1 chip in the earbuds themselves. The site also found some small differences likely related to Apple's efforts to increase the case's water resistance. For all the details, visit iFixit's teardown page for the product. All told, iFixit gave the AirPods a 0 out of 10 for repairability -- that's low even for Apple products. By contrast, the site also opened up Samsung's Galaxy Buds and gave them a 6 out of 10.

One and a half years after announcing a wireless charging mat for iPhones, Apple Watches, and AirPods called AirPower, Apple has unexpectedly cancelled the accessory. From a report: It notably missed its expected shipping dates multiple times, including a potential release alongside the second-generation version of AirPods and charging case this week. "After much effort, we've concluded AirPower will not achieve our high standards and we have cancelled the project," said Apple SVP of Hardware Engineering Dan Riccio in a statement today. "We apologize to those customers who were looking forward to this launch. We continue to believe that the future is wireless and are committed to push the wireless experience forward." Mark Gurman of Bloomberg, adds, "This is fairly unprecedented and unbelievable. The AirPods even have a picture of the AirPower on the box."

New submitter pecosdave writes: I need suggestions for commercially-made ARM systems that will work in temperature ranges from -35F to 140F (-37C to 60C) for an engineering project. These things are going to be in metal boxes on the side of Texas Highways. The existing Intel systems we're using in other areas are all fan-less, but I'm not going to rule out systems with fans. Considering the extremes of Texas temperatures I'm actually contemplating putting fans on top of our fan-less systems anyways. Almost everything I can find pre-made with ARM is a bare board, or something not nearly as temperature tolerant as some Intel systems I can find. The very nature of an ARM processor should be more tolerant simply because they produce less heat, but I can't seem to find any manufacturers exploiting that fact. Slashdot reader pecosdave added more details in a comment: "It's more closely related to speed cameras, but it's not a speed camera. It's for a toll road, and its main job is to take pictures of a sign at about 10 FPS, though less is probably fine, with a time-stamp so if someone runs the toll we have a separate picture of the current price. If there's a problem with the sign it shows up as well. They just want something local to store it I guess in case the fiber link goes down. We're going to run it rather low-res too to keep the CPU and storage overhead low. I figure 640x480@10FPS is reasonable, but that's not set in stone."

prpplague writes: Despite Linus Torvald's recent claims ARM won't win in the server space, there are very specific use cases where ARM is making advances into the datacenter. One of those is for use with software-defined storage with open-source projects like CEPH. In a recent The Register article, Softiron's CTO Phil Straw states about their ARM-based CEPH appliances: "It's a totally shitty computer, but what we are trying to do here is storage, and not compute, so when you look at the IO, when you look at the buffering, when you look at the data paths, there's amazing performance -- we can approach something like a quarter of a petabyte, at 200Gbps wireline throughput." Straw claimed that, on average, SoftIron servers run 25C cooler than a comparable system powered by Xeons." So... ARM in the datacenter might be saying, "I'm not quite dead yet!"

Xiaomi is teasing a new 100W quick-charging solution for mobile phones that can fully charge a large 4,000mAh battery in just 17 minutes. Ars Technica reports: The video shows a charging race between two phones, Xiaomi's unnamed "100W" prototype and a phone with "50W" charging from "Brand O," which looks like it's an Oppo RX17 Pro. I put both of these wattage ratings in quotations because neither phone actually hits its rated charging speed. Xiaomi's video shows a live, in-line power reading, and the "100W" charging shows a sustained ~80W (18V / 4.5A) from about 5-30 percent, with a peak of 88W. The competing 50W Oppo quick-charge solution caps out at around 40W.

Branding aside, what matters is the actual charging speed, and Xiaomi's ability to fully charge a phone battery in 17 minutes is impressive. The test stops when the Xiaomi phone fills up, leaving the Oppo battery stuck at a mere 65 percent. Considering that Xiaomi was charging a 4000mAh battery and that Oppo only had a 3700mAh battery, Xiaomi's solution is about 1.6 times faster than Oppo's quick charge, which is currently the fastest charging scheme on the market. Unfortunately, Xiaomi didn't offer any specifics on how its charging solution works.

GITAI is a robotics startup with offices in Japan and the United States that's developing tech to put humanoid telepresence robots in space to take over for astronauts. IEEE: This week, GITAI is announcing a joint research agreement with JAXA (the Japanese Aerospace Exploration Agency) to see what it takes for robots to be useful in orbit, with the goal of substantially reducing the amount of money spent sending food and air up to those demanding humans on the International Space Station. It's also worth noting that GITAI has some new hires, including folks from the famous (and somewhat mysterious) Japanese bipedal robot company SCHAFT.

[...] GITAI says that their robots will "reduce the cost of space work to 10 percent" of the cost of using a real astronaut, by instead relying on earthbound humans for immersive teleoperation. As you might expect, the trouble with immersive teleoperation between Earth and orbit is getting data back and forth over a restrictive network. Part of GITAI's secret sauce involves compressing "data of 360-degree camera with resolution of 2.7K from original data volume of 800 Mbps to average 2.5 Mbps." At the same time, they've managed to reduce latency to 60 ms, which is really quite good, for talking to space. The plan is to get all of this working in low Earth orbit by 2020.

Massachusetts Senator and Democratic Presidential hopeful Elizabeth Warren has become the highest profile politician to support right to repair legislation in the United States. From a report: On Wednesday, Warren outlined a sweeping plan to support family farms and diminish the power of corporate agriculture. At the top of the list, she supports a national right-to-repair law for tractors and other agricultural equipment. That means she supports the simple idea that people who own a tractor should be able to repair it without permission from John Deere or any other manufacturer. "Farmers should be able to repair their own equipment or choose between multiple repair shops," Warren said in a Medium post outlining her proposal. "That's why I strongly support a national right-to-repair law that empowers farmers to repair their equipment without going to an authorized agent." For now, Warren's proposal would apply only to farm equipment, not consumer electronics.

[...] Farmers operating John Deere tractors have been fighting against John Deere's repair monopoly for years. Device manufacturers don't want people repairing their own stuff and they've taken pains to make it difficult to do so. Newer John Deere equipment comes loaded with software and firmware that make it impossible for farmers to fix their own equipment. Instead, they have to call an authorized dealer and wait for them to show up -- a fix that's too slow and too costly for a farmer. "The national right-to-repair law should require manufacturers of farm equipment to make diagnostic tools, manuals, and other repair-related resources available to any individual or business, not just their own dealerships and authorized agents," Warren said. "This will not only allow individuals to fix their own equipment -- reducing delays -- but it will also create competition among dealers and independent repair shops, bringing down prices overall." Further reading: Grandson of Legendary John Deere Inventor Calls Out Company On Right To Repair.

Joanna Stern, writing for the Wall Street Journal [the link may be paywalled]: Why is the breaking of my MacBook Air keyboard so insanely maddening? Let's take a trip down Memory Lane.
April 2015: Apple releases the all-new MacBook with a "butterfly" keyboard. In order to achieve extreme thinness, the keys are much flatter than older generations but the butterfly mechanism underneath, for which the keyboard is named, aims to replicate the bounce of a more traditional keyboard.
October 2016: The MacBook Pro arrives with a second-generation butterfly keyboard. A few months later, some begin to report that letters or characters don't appear, that keys get stuck or that letters unexpectedly repeat.
June 2018: Apple launches a keyboard repair program for what the company says is a "small percentage" of MacBook and MacBook Pro keyboards impacted.
July 2018: Apple releases a new high-end MacBook Pro with the third-generation of the keyboard that's said to fix the issues.
October 2018: Apple's new MacBook Air also has the third-generation keyboard. I recommend it, and even get one for myself.

Which brings us to the grand year 2019 and my MacBook Air's faulty E and R keys. Others have had problems with Apple's latest laptops, too. A proposed nationwide class-action suit alleges that Apple has been aware of the defective nature of these keyboards since 2015 yet sold affected laptops without disclosing the problem. "We are aware that a small number of users are having issues with their third-generation butterfly keyboard and for that we are sorry," an Apple spokesman said in a statement. "The vast majority of Mac notebook customers are having a positive experience with the new keyboard." If you have a problem, contact Apple customer service, he added. John Gruber, a long time Apple columnist: I consider these keyboards the worst products in Apple history. MacBooks should have the best keyboards in the industry; instead they're the worst. They're doing lasting harm to the reputation of the MacBook brand.

Engineers at the University of Michigan have built the first millimeter-scale stand-alone device that meets Bluetooth Low Energy (BLE) specifications. "Consuming just 0.6 milliwatts during transmission, it would broadcast for 11 years using a typical 5.8-mm coin battery," reports IEEE Spectrum. "Such a millimeter-scale BLE radio would allow these ant-sized sensors to communicate with ordinary equipment, even a smartphone." From the report: The transmitter chip, which debuted last month at IEEE International Solid-State Circuits Conference, had to solve two problems. The first is power consumption, and the second is the size of the antenna. An ordinary transmitter circuit requires a tunable RF oscillator to generate the frequency, a power amplifier to boost its amplitude, and an antenna to radiate the signal. The Michigan team combined the oscillator and the antenna in a way that made the amplifier unnecessary. They called their invention a power oscillator. The key part of an oscillator is the resonant tank circuit: an inductor and a capacitor. Energy sloshes back and forth between the inductor's magnetic field and the capacitor's electric field at a resonant frequency determined by the capacitance and inductance. In the new circuit, the team used the antenna itself as the inductor in the resonant tank. Because it was acting as an inductor, the antenna radiated using changing magnetic field instead of an electric field; that meant it could be more compact.

However, size wasn't the only thing. Quality factor, or Q, is a dimensionless quantity that basically says how efficient your resonator is. As a 14-mm long loop of conductor, the antenna was considerably larger than an on-chip inductor for a millimeter-scale radio could be. That led to a Q was that was about five times what an on-chip inductor would deliver. Though it was a much more efficient solution, in order to meet BLE specifications, the team needed a better way to power the power oscillator. Their solution was to build an on-chip transformer into the circuit that supplies power to it. The transformer looks like two nested coils. One coil is attached to the supply voltage end of the oscillator circuit, and the other is attached to ground side. Pumping the transformer at a frequency twice that of the power amplifier wound up efficiently boosting the flow of power to the antenna.

Two variants of the Pixel Slate, a tablet-laptop hybrid that Google unveiled last year, have been "out of stock" for months now, leading many to believe that Google may have quietly gotten rid of them. From a report: [The Pixel Slate that are powered by the Celeron processor] are nowhere to be seen. They've been out of stock on the Google Store -- the only place these models were very briefly available -- since shortly after launch, four months ago. The $599 and $699 versions of the Pixel Slate brought sub-iPad Pro pricing to Google's prosumer tablet, even if it turned out that the tablet itself beat the iPad in pretty much no sense that mattered. Marques Brownlee, typically known for his easy-going takes and willingness to embrace misunderstood tech products, basically called the cheaper Celeron Slate a turd. This was not a good look for Google. Shortly after that, the Celeron Pixel Slate showed up as sold out on the Google Store, and that status hasn't changed since.