Using a record of solar radiation measurements around China going back to the late 1950s, researchers from ETH Zurich found that China's coal-driven air pollution is significantly reducing the output of solar panels by dimming the Sun. Ars Technica reports: The researchers found that, over the entire record between about 1960 and 2015, the average potential solar generation declined by about 13%. Expressed in terms of capacity factor -- the fraction of a solar panel's maximum output that is actually produced on average -- the drop from the start to the lowest point in 2008 was 0.162 to 0.142. The change wasn't the same everywhere, though, as air pollution and local conditions varied. The five worst provinces actually saw potential generation drops of fully 20-28%. These included industrial centers in the east but also some clearer high-elevation areas in the west where a small amount of air pollution can have a big impact.

If China could go back to its 1950s air quality, its existing solar installations in 2016 would have produced an additional 14 terawatt-hours of electricity for free. As more solar panels are built, that number would only grow. By 2030, cleaner air could net an additional 70 terawatt-hours of electricity each year -- about 1% of total projected electricity generation at that point. To put some dollar signs on these numbers, the researchers used the current feed-in tariff of $0.14 per kilowatt-hour and a projected drop to $0.09 per kilowatt-hour in 2030. In 2016, this would mean cleaner air would have brought $1.9 billion worth of electricity. In 2030, the extra 13% or so of solar potential could be worth over $6 billion per year. The study has been published in the journal Nature Energy.

Scientists from the University Hospital of Dresden Technical University in Germany have successfully bio-printed skin and bone samples upside down to help determine if the method could be used in a low-gravity environment. CNET reports: The skin sample was printed using human blood plasma as a "bio ink." The researchers added plant and algae-based materials to increase the viscosity so it wouldn't just fly everywhere in low gravity. "Producing the bone sample involved printing human stem cells with a similar bio-ink composition, with the addition of a calcium phosphate bone cement as a structure-supporting material, which is subsequently absorbed during the growth phase," said Nieves Cubo, a bioprinting specialist at the university. These samples are just the first steps for the ESA's ambitious 3D bio-printing project, which is investigating what it would take to equip astronauts with medical and surgical facilities to help them survive and treat injuries on long spaceflights and on Mars.

An anonymous reader quotes a report from Ars Technica: The Raspberry Pi 4 was announced two weeks ago as a major new upgrade to the line of cheap single-board hobbyist computers. The Pi 4 featured a faster CPU, options for up to 4GB of RAM, and a new, modern USB-C port for power delivery. The Pi 4 was the Raspberry Pi Foundation's first ever USB-C device, and, well, they screwed it up. As detailed by Tyler Ward, the Raspberry Pi 4 has a non-compliant USB-C charging port and doesn't work with as many chargers as it should. Thanks to the open nature of Raspberry Pi (even the schematics are online!), Ward was able to discover that Raspberry Pi just didn't design its USB-C port correctly. Two "CC" pins on a USB-C port are supposed to each get their own 5.1K ohms resistor, but Raspberry Pi came up with its own circuit design that allows them to share a single resistor. This is not a compliant design and breaks compatibility with some of the more powerful USB-C chargers out there.

Whether your USB-C charger works with the Pi 4 has to do with whether it uses an "e-marked" cable. E-marked cables are fully featured USB-C cables with chips inside that negotiate power management, accessory modes, data rates, and other communication specs. Since the Pi 4 USB-C port is wired incorrectly, these smart cables will detect the Pi 4 as an "Audio Adaptor Accessory" and refuse to charge them. Usually, e-marked cables are more expensive and come with larger, higher-powered items, like a USB-C laptop. After reports started popping up on the Internet, Raspberry Pi cofounder Eben Upton admitted to TechRepublic that "A smart charger with an e-marked cable will incorrectly identify the Raspberry Pi 4 as an audio adapter accessory and refuse to provide power." Upton went on to say, "I expect this will be fixed in a future board revision, but for now users will need to apply one of the suggested workarounds. It's surprising this didn't show up in our (quite extensive) field testing program."

Slashdot reader volvox_voxel shares an excerpt from the latest blog post from software engineer Ken Shirriff, who is well known for his work on restoring some of the rarest computing hardware to its working condition: We've been restoring an Apollo Guidance Computer1. Now that we have the world's only working AGC, I decided to write some code for it. Trying to mine Bitcoin on this 1960s computer seemed both pointless and anachronistic, so I had to give it a shot. Implementing the Bitcoin hash algorithm in assembly code on this 15-bit computer was challenging, but I got it to work. Unfortunately, the computer is so slow that it would take about a billion times the age of the universe to successfully mine a Bitcoin block. He wasn't kidding about how long it would take to successfully mine a Bitcoin block. "The Apollo Guidance Computer took 5.15 seconds for one SHA-256 hash," writes Shirriff. "Since Bitcoin uses a double-hash, this results in a hash rate of 10.3 seconds per Bitcoin hash. Currently, the Bitcoin network is performing about 65 EH/s (65 quintillion hashes per second). At this difficulty, it would take the AGC 4x10^23 seconds on average to find a block. Since the universe is only 4.3x10^17 seconds old, it would take the AGC about a billion times the age of the universe to successfully mine a block."

"AMD is unleashing an arsenal of products today," writes Slashdot reader MojoKid.

Hot Hardware writes: The Zen 2-based AMD Ryzen 3000 series is easily one of the most anticipated product launches in the PC space in recent memory. AMD has essentially promised to address virtually all of the perceived shortcomings of the original Zen-based Ryzen processors, with the Ryzen 3000 series, while continuing to aggressively challenge Intel on multiple fronts -- performance, power, price, you name it.
MojoKid summarizes their analysis: In the benchmarks, performance has been improved across the board. The AMD Ryzen 9 3900X and Ryzen 7 3700X offered superior single and multi-thread performance versus their second-gen counterparts, and better latency characteristics, that allowed them to occasionally overtake processors with more cores / threads in a few multi-threaded tests. On a couple of occasions, the 12-core / 24-thread Ryzen 9 3900X even outpaced the 16-core / 32-thread Threadripper 2950X. Performance versus Intel is more of a mixed bag, but the Ryzen 3000 series still looks strong. Single-thread performance is roughly on-par with Intel's Coffee Lake based Core i9-9900K, depending on the workload. Multi-threaded scaling is a dogfight strictly in terms of absolute performance, but because AMD offers more cores per dollar, the Ryzen 3000 series is the clear winner here.

Meanwhile, AMD's Radeon RX 5700 and Radeon RX 5700 XT Navi-powered graphics cards are set to take on NVIDIA's GeForce RTX offerings in the midrange
There's more details in the original submission, and PC World writes that AMD's Radeon RX 5700 and Radeon RX 5700 XT graphics cards "represent a fresh start and a bright future for AMD, brimming with technologies that have never been seen in GPUs before." But they're not the only site offering a detailed analysis.

Forbes tested the chips on five high-workload games (including World of Tanks and Shadow of the Tomb Raider) and shared their results: As usual, things are very title and resolution dependent, but in general, [AMD's] RX 5700 XT proved to be a slightly better option at 1080p with the RTX 2060 Super mostly matching it above this... However, the 2060 Super was cooler-running and much quieter than its AMD counterpart, plus I'd argue it's better-looking too... You also get the option of Ray Tracing and DLSS, but even discounting those, the Nvidia card is a slightly better buy overall.
But CNET argues that AMD's new graphics cards "are very quiet. They are bigger and do require more power than the RTX 2060...but the 2060 Super has increased power requirements as well."

TL:DR: There's a chip war going on.

"Life's information-storage system is being adapted to handle massive amounts of information," reports Scientific American, reports Scientific American, calling it "an alternative to hard drives" and noting that DNA "is already routinely sequenced (read), synthesized (written to) and accurately copied with ease.

"DNA is also incredibly stable, as has been demonstrated by the complete genome sequencing of a fossil horse that lived more than 500,000 years ago. And storing it does not require much energy." But it is the storage capacity that shines. DNA can accurately stow massive amounts of data at a density far exceeding that of electronic devices. The simple bacterium Escherichia coli, for instance, has a storage density of about 10**19 bits per cubic centimeter, according to calculations published in 2016 in Nature Materials by George Church of Harvard University and his colleagues. At that density, all the world's current storage needs for a year could be well met by a cube of DNA measuring about one meter on a side.

The prospect of DNA data storage is not merely theoretical. In 2017, for instance, Church's group at Harvard adopted CRISPR DNA-editing technology to record images of a human hand into the genome of E. coli, which were read out with higher than 90 percent accuracy. And researchers at the University of Washington and Microsoft Research have developed a fully automated system for writing, storing and reading data encoded in DNA. A number of companies, including Microsoft and Twist Bioscience, are working to advance DNA-storage technology... DNA bar coding is now being used to dramatically accelerate the pace of research in fields such as chemical engineering, materials science and nanotechnology.

"Last month, Rob McGinnis fired up a new machine that runs combustion in reverse, using electricity to weld carbon dioxide and water into liquid fuels," writes Slashdot reader sciencehabit: McGinnis, a chemical engineer and entrepreneur, has launched a new start-up called Prometheus, in hopes that he will be able to synthesize fuels more cheaply than energy giants can drill for oil, ship it and refine it. If powered by solar, wind, or other renewable power sources, McGinnis' machine will churn out carbon neutral fuels, eliminating the fossil from fossil fuels. At the heart of McGinnis' machine is proprietary carbon nanotube-based filter that separates fuel molecules from water without the large energy input normally required for this job. Can a former Yale University theater major remake the $2 trillion liquid fuels industry?
The article adds that the startup signed its first deal last month, "to begin to sell carbon-neutral fuel to Boom Supersonic, a Denver company building a supersonic commercial airliner."

Nuclear power plant manufacturers, such as Westinghouse and Framatome, are developing safer nuclear reactors that use so-called accident-tolerant fuels that are less likely to overheat -- and if they do, will produce very little or no hydrogen. As Scientific American reports, commercial reactors use small pellets of uranium dioxide stacked inside long cylindrical rods made of zirconium alloy, which "allows the neutrons generated from fission in the pellets to readily pass among the many rods submerged in water inside a reactor core, supporting a self-sustaining, heat-producing nuclear reaction." The problem is that if the zirconium overheats, it can react with water and produce hydrogen, which can explode. From the report: In some of the variations, the zirconium cladding is coated to minimize reactions. In others, zirconium and even the uranium dioxide are replaced with different materials. The new configurations could be slipped into existing reactors with little modification, so they could be phased in during the 2020s. Thorough in-core testing, which has begun, would have to prove successful, and regulators would have to be satisfied. In a bonus, the new fuels could help plants run more efficiently, making nuclear power more cost-competitive -- a significant motivation for manufacturers and electric utilities because natural gas, solar and wind energy are less expensive.

Russia is also deploying other safety measures; recent installations at home and abroad by the state-run company Rosatom have newer "passive" safety systems that can squelch overheating even if electrical power at the plant is lost and coolant cannot be actively circulated. Westinghouse and other companies have incorporated passive safety features into their updated designs as well. Manufacturers are also experimenting with "fourth generation" models that use liquid sodium or molten salt instead of water to transfer heat from fission, removing the possibility of dangerous hydrogen production. China reportedly intends to connect a demonstration helium-cooled reactor to its grid this year.

An anonymous reader quotes a report from TechCrunch: Toyota is testing a new and improved version of the solar power cells it previously launched on the Japan-exclusive Prius PHV, in a pilot along with partners Sharp and Japanese national research organization NEDO. This demo car's prototype cells can convert solar energy at 34% and up, which is much better than the existing commercial version's 22.5%. And, unlike its predecessor, it also can charge the car's driving battery while the car is actually moving, recouping significant range while the vehicle is in use. The new system will provide up to 44.5 km (27.7 miles) of additional range per day while parked and soaking up sun, and can add up to 56.3 km (35 miles) of power to both the driving system and the auxiliary power battery on board, which runs the AC, navigation and more.

Using a redesigned solar battery cell film that measures only 0.03 mm (that's 0.001 inches), the vehicle's engineers could put the film over a much broader surface area of the vehicle compared to the existing production version, with solar cells that wrap around covered body components, the rear door and the hood with relative ease. And as mentioned, the system can now work while the car is actually driving, thanks to changes in how generated power is fed to the system, which is a huge step up from the last generation, which could only push power to that auxiliary battery to run the radio, etc. when in motion. This new test vehicle will hit the road in Japan in late July, and perform trials across a range of different regions to test its abilities in different weather and driving conditions.

Ford and Volkswagen have reached an outline agreement to share electric and autonomous car tech, extending their alliance beyond a cooperation on commercial vehicles. Reuters reports: VW will share its MEB electric vehicle platform [a part bin and toolkit for building electric vehicles] with Ford, the source said. Volkswagen's supervisory board is due to discuss deepening the alliance at a meeting on July 11, 2019, a second source told Reuters. A Ford spokeswoman said, "Our talks with Volkswagen continue. Discussions have been productive across a number of areas. We'll share updates as details become more firm."

On July 1st, California became the first state in the nation to try to reduce the power of bots by requiring that they reveal their "artificial identity" when they are used to sell a product or influence a voter. Violators could face fines under state statutes related to unfair competition. From a report: Just as pharmaceutical companies must disclose that the happy people who say a new drug has miraculously improved their lives are paid actors, bots in California -- or rather, the people who deploy them -- will have to level with their audience. "It's literally taking these high-end technological concepts and bringing them home to basic common-law principles," Robert Hertzberg, a California state senator who is the author of the bot-disclosure law, told me. "You can't defraud people. You can't lie. You can't cheat them economically. You can't cheat 'em in elections."

California's bot-disclosure law is more than a run-of-the-mill anti-fraud rule. By attempting to regulate a technology that thrives on social networks, the state will be testing society's resolve to get our (virtual) house in order after more than two decades of a runaway Internet. We are in new terrain, where the microtargeting of audiences on social networks, the perception of false news stories as genuine, and the bot-led amplification of some voices and drowning-out of others have combined to create angry, ill-informed online communities that are suspicious of one another and of the government. Regulating bots should be low-hanging fruit when it comes to improving the Internet. The California law doesn't even ban them outright but, rather, insists that they identify themselves in a manner that is "clear, conspicuous, and reasonably designed."

intensivevocoder writes: One of the consequences of the explosive popularity of the Raspberry Pi is the flourishing of competing ecosystems of single-board computers (SBCs). Aside from the accessibility a $35 price tag offers, the foremost benefit of the Raspberry Pi is the community -- the proliferation of projects and integrations that center around the Raspberry Pi, and the ease-of-use that creates, makes competing products that look better on spec sheets a disappointment when taken out of the box. PINE64 has attempted to head this off by fostering an involved community; the PINE64 website explains their philosophy as "the community gets to actively shape the devices, as well as the social platform, of PINE64 from the ground up. The goal is to deliver ARM64 devices that you really wish to engage with and a platform that you want to be a part of." The first-generation Pinebook was available in an 11.6" or 14" configuration, with a quad-core Allwinner A64, 2GB RAM, 16GB eMMC, and 1366x768 display for $99, beating Nicolas Negroponte's OLPC XO-1, a decade after that project sputtered.

PINE64 is differentiating itself by building not just SBCs, but notebooks, tablets, and phones with community input and feedback. Ahead of the release of the Pinebook Pro this summer, a Rockchip RK3399-based ARM laptop with 4GB LPDDR4 RAM, 64GB eMMC, and a 14" 1080p display, TechRepublic interviewed PINE64 community manager Lukasz Erecinski about the Pinebook Pro, and the PINE64 community philosophy. An excerpt from the interview: TechRepublic: Why is Pine64 building a device ecosystem of not just SBCs, but also finished devices, like tablets, laptops, and phones?
Lukasz Erecinski: While SBCs are and will remain our bread and butter, there is no denying that our vision for PINE64 has expanded beyond the SBC market. The core aim of our project remains the same however -- to foster a community and bring affordable ARM64 devices to developers and end-users. You have correctly identified that we are building eco-systems; that is to say, we strive for convergence between our SBCs and other ARM64 devices we manufacture. In result, when evaluating future SOCs, we're not only considering if they'll make for good SBCs but also laptops, modules, tablets, etc. As time progresses, you will see more and more of this type of convergence across devices from us. Allwinner A64 and Rockchip RK3399 are two examples of what we strive for: the Pine64-LTS, the SOPine, Pinebook, PineTab and PinePhone all share the Allwinner A64, whilst the RockPro64, Pinebook Pro and SORock (upcoming module akin to the SOPine) use the Rockchip RK3399.

A tiny phone, tablet and laptop charger, the first to use gallium nitride rather than silicon chips, has seen sales four times greater than predicted [Editor's note: the link may be paywalled], prompting the Chinese company behind it to try to ramp up production. From a report: Anker, a Shenzhen-based company that specialises in computer and mobile phone accessories, unveiled a line of chargers using gallium nitride (GaN), which conducts electrons 1,000 times faster than silicon, in January. The use of GaN allowed Anker to virtually halve the size of its charger, while retaining full-speed charging. Another Chinese-owned company, RAVPower, has also started using GaN in its chargers. "Silicon limits have been pushed almost to the extreme," said Steven Yang, co-founder and chief executive of Anker. "But GaN is at [the next] phase."

The introduction of the new semiconductor into the consumer market came after a series of military and other commercial applications, in everything from electric vehicles to radar systems. Raytheon, the US defence group, said in 2017 that it had spent $300m researching GaN since 1999. Like some of its peers, it uses the material in its active electronically scanned array (AESA) radars, which are able to detect stealth fighters at long range. "Once the power technology is out of the box it will be widely adopted around the world and that means everyone can produce power-switching modules," said Stephen Bryen, a former deputy undersecretary of defence and senior fellow at the American Center for Democracy. "And that is what is used in the radars -- that's the nexus between commercial and military use."

schwit1 quotes a report from ZDNet: On Tuesday, the U.S. Department of Justice (DoJ) said that Yi-Chi Shih, a part-time Los Angeles resident, attempted to secure semiconductor chips used in US military applications in order to transfer them to Chinese associates. The 64-year-old was subject to a six-week trial in a Los Angeles, California federal court. Prosecutors alleged that Shih, alongside co-defendant Kiet Ahn Mai of Pasadena, California, conspired to gain access to a sensitive system belonging to an unnamed U.S. firm which manufactured semiconductor chips and Monolithic Microwave Integrated Circuits (MMICs).

The victim company's PC systems were accessed fraudulently after Mai posed as a potential customer, giving Shih the opportunity to obtain custom processors. While the firm in question believed the chips would only be used in the United States, Shih transferred the products to the Chengdu GaStone Technology Company (CGTC), a Chinese firm building an MMIC manufacturing plant. Evidence suggested that Shih managed to "defraud the U.S. company out of its proprietary, export-controlled items, including its design services for MMICs." A sentencing hearing is yet to be scheduled. The range of charges could see Shih face a maximum sentence of 219 years in federal prison, and the judge presiding over the case is also considering the prosecution's request for hundreds of thousands of dollars to be made forfeit.

According to Thurrott's Brad Sams, Microsoft is still developing a low-cost, cloud-based Xbox console. "Sams suggests the low-power box will be just capable enough to allow a player to 'move around in a virtual environment,' but crucially, game elements like NPCs, interactables, text and even graphics won't be there," reports VG247. From the report: This is obviously not playable, but the idea is that having movement calculations run locally reduces input lag compared to a 100% streamed game. Though this might make technical sense, it's hard to imagine the company pushing this hard unless the difference is really perceptible. Of course, there's a lot we still don't know about the streaming market, and some segment of that audience may opt to pay $80 or so to get an experience better than running the game through a web browser.

The Indian Institute of Technology (IIT) Madras has released the software development kit (SDK) for its open-source Shakti processor. Shakti is based on the open-source RISC-V instruction set architecture and was funded by the Indian Ministry of Electronics and Information Technology. The institute promised that a development board will also be released soon. Tom's Hardware reports: The RISE group at IIT Madras started working on the Shakti project in 2016 with a plan to release a family of six classes of processors, each serving a different market. The group promised that the reference processors will be competitive with commercial offerings in terms of area, performance and power consumption. Now India, like China and the European Union, are showing interest in designing their own processors, rather than relying on ones designed by U.S. manufacturers. With the release of the Shakti SDK, developers can begin to develop applications for the Shakti processors, even before they're commercialized.

Apple says a "very small number" of MacBook Air models have an issue with the main logic board and can be replaced at no cost to customers. 9to5Mac reports: Apple's memo to repair staff notes that it has identified "an issue" with the main logic board specifically in Retina, 13-inch, 2018 MacBook Air models with certain serial numbers. Apple will be emailing customers with machines with the serial numbers they've identified as being affected, otherwise customers can take their machine to Apple Stores or authorized repair staff to have their devices checked out. Apple's documents list symptoms as issues with "power," but do not elaborate on what problems users are experiencing exactly. A quick search online for problems with the 2018 MacBook Air logic board shows reports back to when the device first launched with some users' machines not able to power on at all. The affected machines will be covered for four years from the original purchase date. Users that think they might be experiencing the issue can take their MBA to Apple Stores or an Apple authorized service provider.

MojoKid writes: NVIDIA just launched three new GeForce RTX gaming GPUs to battle against AMD's forthcoming Radeon RX 5700 series. The GeForce RTX 2080 Super, GeForce RTX 2070 Super and GeForce RTX 2060 Super will all be shipping this month. GeForce RTX 2070 Super and RTX 2060 Super cards are out making the rounds in benchmark reviews, while the RTX 2080 Super will arrive in a couple of weeks. The GeForce RTX 2070 Super is more than just an overclocked RTX 2070 but actually based on the GeForce RTX 2080's TU104 NVIDIA Turing GPU with 40 active SMs, for a total of 2,560 CUDA cores at 1,605MHz and 1,770MHz base and boost clocks, respectively. The RTX 2060 Super is still based on the original TU106 GPU, but it has four additional SMs enabled, which brings the CUDA core count up to 2,176 (from 1,920) at a somewhat higher 1470MHz base clock and boost clock 30MHz lower at 1,650MHz.

There is an additional 2GB of GDDR6 memory on the card too for a total of 8GB now. Performance-wise, both cards are significant upgrades over the originals, with roughly 10 -- 23 percent gains, depending on the resolution or application. The GeForce RTX 2070 Super is often faster than the pricier AMD Radeon VII, especially at 1440p. At 4K, however, the Radeon VII's memory bandwidth advantage often gives it an edge. The new GeForce RTX 2060 Super is faster than a Radeon RX Vega 64 more often than not. It will be interesting to see how these cards compete with AMD's Radeon RX 5700 Navi-based card when they arrive later this month. NVIDIA could have just thrown a wrench in the works for AMD.

carbonnation writes: As Spock so elegantly opined, "Logic clearly dictates that the needs of the many outweigh the needs of the few." Today Stanford U researchers presented the clearest proof to date that self-sacrifice can also benefit wind farms. In their demonstration at an Alberta wind farm, one turbine sacrifices a fifth of its generating potential to enable better performance by neighboring turbines, boosting the group's collective output. And all it takes to harness this altruistic behavior is a small (but intelligent) tweak to their control systems. "It is called 'wake steering' because rotors are turned about their towers to point slightly away from the oncoming wind and thus deflect their wakes away from downstream turbines," reports IEEE Spectrum. "To determine the best yaw angle for their experiment, the Stanford team fed five years of wind speed, wind direction and power generation data from the six test turbines to their proprietary optimization algorithm. Combining that data with a simple wind model, the algorithm projected that yawing each of the five upstream turbines about 20 degrees to the north would maximize the group's generation from the northwest winds."

Next, since the researchers couldn't reprogram the control systems running at Pincher Creek, they repositioned the direction-tracking wind vanes atop the turbines' nacelles during the 10-day test and thereby tricked the control system to turn 20 degrees off the wind. The results were significant: power generation rose 13 percent under 7-8 meters per second (mps) wind speeds. "Steering had a still greater impact amidst slower northwest winds by reducing the times when the wind hitting turbines fell below the 5 mps -- the threshold at which they automatically shut down," the report adds. "For 5-6 mps winds wake steering boosted generation by up to 47 percent."

On July 1st, 1979, Sony revolutionized the way we listen to music when it released the iconic Walkman TPS-L2, the first real portable music player. "Boomboxes and portable radios had been around for a while, but the Walkman made portable music private, ushering in a whole new era of people listening to music away from home," writes Chaim Gartenberg for The Verge. The Walkman stood the test of time by continuing to sell well even through the CD era. "[It] would go on to see numerous hardware iterations over the years, including 'Discman' CD models and MiniDisc players, as well as more modern portable media player devices that Sony still sells today," writes Gartenberg. It wasn't until Apple unveiled the iPod in 2001 and digital downloads began to dominate that Walkman sales started to plummet.

What do you remember about the Sony Walkman? Do you have any fond memories of the music player that are worth sharing? Let us know in a comment.