SlashdotNews for nerds, stuff that matters
May 27th 2026, 03:30 by BeauHD
An anonymous reader quotes a report from Wired: Aerodynamic drag is a major "barrier" in high-speed airplanes, automobiles, and bullet trains. This is because a design with less aerodynamic drag allows the aircraft to move at higher speeds with less energy. When an aircraft or car body moves at high speed, a thin layer of air called the "boundary layer" is formed on its surface. This boundary layer has two states: laminar flow, in which air flows in an orderly fashion, and turbulent flow, which involves turbulence. The longer the air stays in the laminar flow state with low friction, the smaller the air resistance becomes, but as the air speed increases, it transitions to turbulent flow. The key to reducing aerodynamic drag is how to delay this transition to turbulence. For more than 80 years, the principle of "the surface of an object must be smooth" has been the basic premise of aeronautical engineering throughout the world in order to suppress the transition to turbulence and reduce aerodynamic drag. This premise was based on the results of a 1940 study by Ichiro Tani, a Japanese aerodynamicist who quantitatively demonstrated the relationship between "surface roughness" (an indicator of the state of the machined surface) and turbulent transition, arguing that surface roughness, which was unavoidable with the manufacturing technology of the time, prevented laminar flow from being realized. However, in 1989 Tani reinterpreted the experimental data on rough-surface pipes obtained by fluid engineer Johann Nikulase in the 1930s, bringing a new perspective that "roughness may not necessarily only promote turbulent transition and increase fluid resistance." Inheriting this idea, a research group led by Yasuaki Kohama of Tohoku University experimentally demonstrated in the 1990s that fibrous rough surfaces, which have fine fibrous irregularities on their surface, have the effect of delaying transition under certain conditions. The same Tohoku University research team recently announced a discovery that significantly advances this trend. Aiko Yakino, associate professor at Tohoku University's Institute of Fluid Science, and her research group were the first in the world to demonstrate that aerodynamic drag can be reduced by up to 43.6 percent simply by applying distributed micro-roughness (DMR), a surface roughness so fine and irregular that it cannot be distinguished by the naked eye. This technology is fundamentally different from the "rivulet (shark skin) process," which is known as a typical aerodynamic drag reduction technology. The rivulet process mimics the fine longitudinal grooves in shark skin, and by carving grooves approximately 0.1 mm wide along the direction of airflow, it aligns the vortices that occur near the wall surface of turbulent airflow areas. DMR, on the other hand, delays the switch from laminar to turbulent flow by means of random and minute irregularities. The flow zones it affects and the mechanisms it employs are based on completely different concepts.
 
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May 26th 2026, 23:00 by BeauHD
Hobbyist CNCDan is trying to build a real-world version of Windows' classic 3D Pinball for Windows -- Space Cadet, using 3D-printed flippers, bumpers, LEDs, slingshots, and a raised playfield modeled after the original virtual table. But in bringing the digital table into the real world, CNCDan has already run into several physical challenges the software never had to contend with... Ars Technica reports: After scaling and skewing the on-screen, perspective-shifted view of the Space Cadet playfield onto a 1-meter-tall table, he ended up with a rectangular playfield just 56 cm wide. That's on the smaller side for commercial pinball tables and maps to playfield bumpers that are just 53 mm wide -- way smaller than any prebuilt bumpers that are commercially available. Once CNCDan dealt with issues with unreliable plastic microswitches for those tiny bumpers (Hall effect magnets seemed to help), he ran into a separate problem with the even smaller bumpers on the raised playfield. The wiring for those bumpers had to be arranged very carefully to avoid blocking a kickback return alley underneath, a positioning problem that the original designers of the virtual table didn't have to consider at all. CNCDan also ended up adding a physical mechanism to simulate the short delay 3D Space Cadet players may remember, when the ball dropped down a hole from the raised playfield back to the flippers below. CNCDan says he's currently looking for artists to help him with a hand-drawn re-creation of the original Space Cadet playfield, which he doesn't want to use AI for. "I'm sure [AI] can do it, but I'd much rather give this job to a real human being," he said in the video.
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May 26th 2026, 22:00 by BeauHD
An anonymous reader quotes a report from the BBC: Internet access has started to be restored in Iran after being cut off almost three months ago, the country's first vice-president has said. "The first step toward free and regulated access to cyberspace has been taken," Mohammad Reza Aref wrote on X on Tuesday. Internet monitoring groups Netblocks and Kentik reported "partial" restoration around 13:00 GMT, though the latter warned most networks were still down. The Iranian government cut internet access following the launch of US and Israeli attacks on February 28. Officials suggested the aim was to prevent surveillance, espionage and cyber-attacks. It is one of the longest-running national internet shutdowns ever recorded worldwide. A content creator from Tehran told the BBC that he had been able to connect to the internet using his home WiFi on Tuesday. "The main point is, some of my income will come back," he said. Netblocks said it was unclear whether the internet return would be sustained, and told the BBC it was consistent with what it had seen when previous blackouts were lifted -- where restoration could take hours. "Access is not universally back to its original state, with some regional variation," said the global internet tracker's research director Isik Mater on Tuesday. She added that there were signs of "more extensive filtering" than prior to January -- when a similar blackout was imposed during the regime's deadly crackdown on anti-government protests -- "including additional restrictions to messaging apps like WhatsApp."
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May 26th 2026, 21:00 by BeauHD
wiredmikey shares a report from SecurityWeek: Anthropic says its Claude Mythos model discovered thousands of severe vulnerabilities across more than 1,000 open source software (OSS) projects. According to the AI giant, Mythos Preview has identified more than 23,000 potential vulnerabilities. Of these, 1,900 have been reviewed by external security firms, and 1,726 have been confirmed, including over 1,000 rated "high" or "critical" severity. The findings are still being reviewed, and Anthropic estimates that nearly 3,900 critical and high-severity vulnerabilities will be confirmed based only on current findings. As the scans are ongoing, the company believes the number of severe vulnerabilities may reach 6,200. Anthropic says more than 1,100 unverified findings have been reported to vendors, and 75 issues with a critical or high severity rating have been patched. Vendors have published 65 security advisories. "The number of patches is still relatively low for three reasons. First, we're still early in the 90-day window that's set out in our Coordinated Vulnerability Disclosure policy: we expect many more patches to land soon," the AI company explained. "Second, we are likely to be undercounting patches because some vulnerabilities are patched without a public advisory: in those cases, we're reliant on scanning for the patches ourselves using Claude. Third, the low volume of patches reflects a genuine problem: even at our relatively slow pace of disclosures, Mythos Preview is adding to an already-overloaded security ecosystem," it added.
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May 26th 2026, 20:00 by BeauHD
Spain has temporarily blocked Polymarket and Kalshi while it investigates whether the prediction-market platforms are violating gambling laws by operating without a license. Engadget reports: The country's ministry in charge of consumer affairs said it blocked the websites as a precautionary measure pending an official investigation. This investigation will determine if the platforms violate Spain's gambling laws. It's set to complete within the next four months and could mandate that these companies require specific administrative licenses to operate.
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May 26th 2026, 19:00 by BeauHD
An anonymous reader quotes a report from Reuters: Ride-share drivers for app-based companies such as Uber and Lyft have unionized in Massachusetts, forming what state officials and labor leaders said was the first officially recognized organization in the U.S. to represent such gig workers. The newly formed App Drivers Union received certification from the Massachusetts Department of Labor Relations on Friday to represent nearly 70,000 ride-share drivers operating as independent contractors in the state. "It changes the game for ride-share workers across this country," Massachusetts Governor Maura Healey, a Democrat, said at a rally with drivers and labor activists in Boston on Tuesday. The certification occurred after voters in November 2024 approved a ballot measure that created a novel framework to allow drivers for companies like Uber and Lyft to organize and bargain collectively over pay and benefits. That vote followed a years-long, nationwide battle over whether ride-share drivers should be considered independent contractors or employees entitled to benefits and wage protections.
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May 26th 2026, 18:00 by BeauHD
"Following months of public debate and protests against American IT giant Kyndryl's proposed acquisition of Solvinity, a Dutch cloud provider that hosts the Netherlands' online identity platform, the Dutch government has decided to block the acquisition," writes longtime Slashdot reader rastakid. "The deal triggered fears that it would mean that 'DigiD' data would fall under foreign control, and could be demanded by U.S. authorities." Politico reports: In a letter to the national parliament published on Tuesday, State Secretary for Digital Economy Willemijn Aerdts said the national authority charged with screening investments had advised the government to block the acquisition. The purchase was seen as posing "a possible risk to the public interest." The government on Monday decided to adopt the advice and block the acquisition, Aerdts said. "The Netherlands attaches great value to the presence of foreign, especially U.S.-based tech companies, and their added value to the Dutch economy and digital infrastructure, but it maintains, at the same time, an independent investment screening framework aimed at protecting the public interest and which applies equally to all investors, independent of their country of origin," the letter read. Kyndryl said in a statement it was "extremely disappointed" about the decision. "The politicization of this process has overshadowed the clear and important benefits this transaction would have brought to Solvinity's customers and Dutch citizens." Further reading: Challenges Face European Governments Pursuing 'Digital Sovereignty'
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May 26th 2026, 17:00 by BeauHD
Nvidia is retiring its classic Control Panel for GeForce Game Ready and Studio Driver users after 20 years, as it pushes users to a newer, more unified "NVIDIA" app. Longtime Slashdot reader BrendaEM first shared the news, commenting: "Nvidia seems to no long want you to have control over your own video card that you paid your hard-earned money for? WTF!?" VideoCardz.com reports: Existing Control Panel installs will remain on users' systems. NVIDIA says the old panel will only disappear after a clean driver installation. Users who still need it can continue to download it from the Microsoft Store, but NVIDIA will no longer add new features, fixes, or other changes. The retirement currently applies to Game Ready and Studio Drivers. NVIDIA RTX PRO users will continue to receive Control Panel support until the company moves professional features to the NVIDIA app. For GeForce users, NVIDIA says the app now includes the modern functionality previously available through Control Panel. [...] The classic panel is therefore not being removed from every system overnight. It is being moved into maintenance mode for GeForce users...
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