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"Digital twin technology is one of the most significant disruptors of global manufacturing seen this century," argues Motor Trend, "and the automobile industry is embracing it in a big way." Roughly three-quarters of auto manufacturers are using digital twins as part of their vehicle development process, evolving not only how they design and develop new cars but also the way they monitor them, fix them, and even build them... Nvidia, best known for its consumer graphics cards, also has a digital twin solution, called Omniverse, which manufacturers such as Mercedes-Benz are using to design their manufacturing processes. "Their factory planners now have every single element in the factory that they can then put in that virtual digital twin first, lay it all out, and then operate it," Danny Shapiro, VP of automotive at Nvidia said. At that point, those planners can run the entire manufacturing process virtually, ensuring every conveyor feeds the next step in the process, identifying and addressing factory floor headaches long before production begins... Software developers can run their solutions within digital twins. That includes the code at the lowest level, basic stuff that controls ignition timing within the engine for example, all the way up to the highest level, like touchscreens responding to user inputs. "We're not just simulating the operation outside the car, but the user experience," Nvidia's Shapiro said. "We can simulate and basically run the real software that would be running in that car and display it on the screens." By bringing all these systems together virtually, developers can find and solve issues earlier, preventing costly development delays or, worse yet, buggy releases... Using unique identifiers, manufacturers can effectively create internal digital copies of vehicles that have been produced. Those copies can be used for ongoing tests and verifications, helping to anticipate things like required maintenance or susceptibility to part failures. By using telematics, in-car services that remotely communicate a car's status back to the manufacturer in real-time, these digital twins can be updated to match the real thing. "By monitoring tire health, tire grip, vehicle weight distribution, and other critical parameters, engineers can anticipate potential problems and schedule maintenance proactively, reducing downtime and extending the vehicle's lifespan," Tactile Mobility's Tzur said.

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Artist Agnieszka Pilat tells The Register how she gets Spot to paint, not pant

Boston Dynamics' "Spot" robot dog has been deployed as a tour guide, a police officer, and a warehouse worker. At the National Gallery Of Victoria's Triennial in Melbourne, Australia, it's now doing duty as an artist.…

Roy Longbottom worked for the U.K. covernment's Central Computer Agency from 1960 to 1993, and "from 1972 to 2022 I produced and ran computer benchmarking and stress testing programs..." Known as the official design authority for the Whetstone benchmark), Longbottom writes that "In 2019 (aged 84), I was recruited as a voluntary member of Raspberry Pi pre-release Alpha testing team." And this week — now at age 87 — Longbottom has created a web page titled "Cray 1 supercomputer performance comparisons with home computers, phones and tablets." And one statistic really captures the impact of our decades of technological progress. "In 1978, the Cray 1 supercomputer cost $7 Million, weighed 10,500 pounds and had a 115 kilowatt power supply. It was, by far, the fastest computer in the world. The Raspberry Pi costs around $70 (CPU board, case, power supply, SD card), weighs a few ounces, uses a 5 watt power supply and is more than 4.5 times faster than the Cray 1." Thanks to long-time Slashdot reader bobdevine for sharing the link.

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What would happen if we built a concert venue in near-Earth orbit? A science policy journalist explores the question in the Washington Post: Forget U2 in the Las Vegas Sphere. Take me to a real concert in the round, where I can float 360 degrees around the stage, watching a guitarist shred from the perspective of a fly and inventing dance moves that Earth's gravity would forbid. Before you dismiss this as a hallucination, consider that we're on the cusp of a new era of space travel. Engineer and space architect Ariel Ekblaw, founder of MIT's Space Exploration Initiative, says that within a decade, a trip off the planet could become as accessible as a first-class airline ticket — and that, in 15 or 20 years, we can expect space hotels in near-Earth orbit. She's betting on it, having founded a nonprofit to design spherical, modular habitats that can assemble themselves in space so as to be lightweight and compact at launch, much like the James Webb Space Telescope that NASA vaulted into deep space two years ago. "The first era of space travel was about survival," she told me as I recently toured her lab. "We're transitioning now to build spaces that are friendlier and more welcoming so that people can thrive in space as opposed to just survive." There's no reason, Ekblaw said, that a concert hall can't be one of those structures. The article ultimately calls this "an impulse for space travel I can get behind: curiosity about who we are and what more we can create when we reach beyond Earth. This is the realm of not just scientists and engineers but of all kinds of dreamers. It's a rendition of space exploration that can engage anyone to imagine what's possible."

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As the year comes to a close, "one constant, reliable source of awe and beauty is the sky over our head..." writes astronomer Phil Plait in Scientific America "And every year we see new things, or old things in new ways, and I've been set the wonderful task of selecting my favorites and relaying them and their import to you." End-of-year lists, especially those displaying astronomical imagery, tend to be splashy and colorful. That's understandable, but what they sometimes miss are the more subtle photographs, those that hide momentous discoveries in minor visual details or offer fresh perspectives on familiar objects. They may not leap off the page, but they still have an impact. That's what I've kept in mind while sorting through this year's celestial treasure trove. This gallery is by no means complete, but it shows what I think are some of the most interesting astronomical portraits to have emerged in 2023. No gallery such as this would be complete without something from the James Webb Space Telescope (JWST), our newest infrared eye on the sky. This monster observatory has already brought so many small revolutions to astronomy that picking one from the past year is no small task. Should it be a baby star throwing an immense tantrum or a massive old star shedding material at colossal rates before it inevitably explodes as a supernova? Or should it be a map of a mind-stomping 100,000 galaxies? Well, how about something very, very different — such as the skeletal structure of a nearby galaxy's intricate web of dust [also displayed at the top of Scientiic American's article]...? [I]t has a beautiful spiral structure and shows the effects of a smaller galaxy colliding with it. In the phenomenally sharp and decidedly eerie false-color view from JWST's Mid-Infrared Instrument, we see countless clouds of cosmic dust in a skeletonlike pattern. Each of these clouds is made up of small grains of rocky and sooty carbon-based molecules expelled by dying stars... Astronomers captured this image to better understand how stars are born in stellar nurseries and how they evolve over time.

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It was a half a century ago that America passed legislation to protect vanishing species and their habitats — and since then, more than five dozen species have recovered. Just one example: In 1963 only 417 nesting pairs of bald eagles were found in the lower 48 states. But today there's more than 300,000 bald eagles, writes USA Today. "[T]hough its future remains uncertain, many experts say it remains one of the nation's crowning achievements." But 1,252 species are still listed as endangered in the U.S. — 486 animals, and 766 plants — with 417 more species categorized as "threatened." The perils of the changing climate add urgency to calls for increased funding and more protection. In North Carolina, for example, the rising sea steadily creeps over a refuge that's home to the sole remaining wild red wolf population. Off New England, warming waters forced changes in the foraging habits of the endangered North Atlantic right whale, putting the massive marine mammals in harm's way more often... One in 5 plant and animal species in the nation remain at risk of extinction, says Susan Holmes, executive director of the Endangered Species Coalition. "Loss of habitat and climate change are absolutely some of the most important threats that we have." "We are at what I would say is a pivotal moment with the threats of climate change," she said. "We have to act faster than ever in order to ensure that these species are going to thrive."

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"Electric cars are already upending America," argues a new article in the Atlantic, citing booming sales and new models that are "finally starting to push us into the post-gas age." Americans are on track to buy a record 1.44 million of them in 2023, according to a forecast by BloombergNEF, about the same number sold from 2016 to 2021 total. "This was the year that EVs went from experiments, or technological demonstrations, and became mature vehicles," Gil Tal, the director of the Electric Vehicle Research Center at UC Davis, told me.... Nearly 40 new EVs have debuted since the start of 2022, and they are far more advanced than their ancestors. For $40,000, the Hyundai Ioniq 6, released this year, can get you 360 miles on a single charge; in 2018, for only a slightly lower cost, a Nissan Leaf couldn't go half that distance.... All of these EVs are genuinely great for the planet, spewing zero carbon from their tailpipes, but that's only a small part of what makes them different. In the EV age, cars are no longer just cars. They are computers... The million-plus new EVs on the road are ushering in a fundamental, maybe existential, change in how to even think about cars — no longer as machines, but as gadgets that plug in and charge like all the others in our life. The wonderful things about computers are coming to cars, and so are the terrible ones: apps that crash. Subscription hell. Cyberattacks... If cars are gadgets now, then carmakers are also now tech companies. An industry that has spent a century perfecting the internal combustion engine must now manufacture lithium-ion batteries and write the code to govern them. Imagine if a dentist had to pivot from filling cavities to performing open-heart surgery, and that's roughly what's going on here. "The transition to EVs is completely changing everything," Loren McDonald, an EV consultant, told me. "It's changing the people that automotive companies have to hire and their skills. It's changing their suppliers, their factories, how they assemble and build them. And lots of automakers are struggling with that...." Job cuts are already happening, and more may come — even after the massive autoworker strike this year that largely hinged on electrification. Such a big financial investment is needed to electrify the car industry that from July to September, Ford lost $60,000 for every EV it sold. Or peel back one more onion layer to car dealerships: Tesla, Rivian, and other EV companies are selling directly to consumers, cutting them out. EVs also require little service compared with gas vehicles, a reality that has upset many dealers, who could lose their biggest source of profit. None of this is the future. It is happening right now.

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"Since the 1960s engineers around the world have been fiddling with a novel type of jet called a rotating detonation engine (RDE), but it has never got beyond the experimental stage," reports the Economist. "That could be about to change." GE Aerospace, one of the world's biggest producers of jet engines, recently announced it was developing a working version. Earlier this year America's Defence Advanced Research Projects Agency awarded a $29m contract to Raytheon, part of RTX, another big aerospace group, to develop an RDE called Gambit. Both engines would be used to propel missiles, overcoming the range and speed limitations of current propulsion systems, including rockets and existing types of jet engines. However, if the companies are successful in getting them to work, RDEs might have a much broader role in aviation — including the possibility of helping revive supersonic air travel. In a nutshell, an RDE "replaces fire with a controlled explosion", explains Kareem Ahmed, an expert in advanced aerospace engines at the University of Central Florida. In technical terms, this is because a jet engine relies on the combustion of oxygen and fuel, which is a subsonic reaction that scientists call deflagration. Detonation, by comparison, is a high-energy explosion that takes place at supersonic speeds. As a result it is a more powerful and potentially a more efficient way of producing thrust, the force that drives an aircraft forward... By modifying an aircraft's fuselage and wings, engineers believe they can reduce the boom's impact on the ground below. Such work will help to determine whether or not future supersonic passenger planes will, like Concorde, be restricted to flying beyond the speed of sound only over oceans. Thanks to long-time Slashdot reader SpzToid for sharing the article.

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TechCrunch argues that in 2023, "established technologies relied on by millions hit a chaos curve, making people realize how beholden they are to a proprietary platform they have little control over." The OpenAI fiasco in November, where the ChatGPT hit-maker temporarily lost its co-founders, including CEO Sam Altman, created a whirlwind five days of chaos culminating in Altman returning to the OpenAI hotseat. But only after businesses that had built products atop OpenAI's GPT-X large language models (LLMs) started to question the prudence of going all-in on OpenAI, with "open" alternatives such as Meta's Llama-branded family of LLMs well-positioned to capitalize. Even Google seemingly acknowledged that "open" might trump "proprietary" AI, with a leaked internal memo penned by a researcher that expressed fears that open source AI was on the front foot. "We have no moat, and neither does OpenAI," the memo noted. Elsewhere, Adobe's $20 billion megabucks bid to buy rival Figma — a deal that eventually died due to regulatory headwinds — was a boon for open source Figma challenger Penpot, which saw signups surge amid a mad panic that Adobe might be about to unleash a corporate downpour on Figma's proverbial parade. And when cross-platform game engine Unity unveiled a controversial new fee structure, developers went berserk, calling the changes destructive and unfair. The fallout caused Unity to do a swift about turn, but only after a swathe of the developer community started checking out open source rival Godot, which also now has a commercial company driving core development. Thanks to wiggles (Slashdot reader #30,088) for sharing the article.

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TechCrunch reports: Apple's warnings in late October that Indian journalists and opposition figures may have been targeted by state-sponsored attacks prompted a forceful counterattack from Prime Minister Narendra Modi's government. Officials publicly doubted Apple's findings and announced a probe into device security. India has never confirmed nor denied using the Pegasus tool, but nonprofit advocacy group Amnesty International reported Thursday that it found NSO Group's invasive spyware on the iPhones of prominent journalists in India, lending more credibility to Apple's early warnings. "Our latest findings show that increasingly, journalists in India face the threat of unlawful surveillance simply for doing their jobs, alongside other tools of repression including imprisonment under draconian laws, smear campaigns, harassment, and intimidation," said Donncha Ã" Cearbhaill, head of Amnesty International's Security Lab, in the blog post. Cloud security company Lookout has also published "an in-depth technical look" at Pegasus, calling its use "a targeted espionage attack being actively leveraged against an undetermined number of mobile users around the world." It uses sophisticated function hooking to subvert OS- and application-layer security in voice/audio calls and apps including Gmail, Facebook, WhatsApp, Facetime, Viber, WeChat, Telegram, Apple's built-in messaging and email apps, and others. It steals the victim's contact list and GPS location, as well as personal, Wi-Fi, and router passwords stored on the device... According to news reports, NSO Group sells weaponized software that targets mobile phones to governments and has been operating since 2010, according to its LinkedIn page. The Pegasus spyware has existed for a significant amount of time, and is advertised and sold for use on high-value targets for multiple purposes, including high-level espionage on iOS, Android, and Blackberry. Thanks to Slashdodt reader Mirnotoriety for sharing the news.

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"Remote-work numbers have dwindled over the past few years as employers issue return-to-office mandates," reports USA Today. "But will that continue in 2024?" The numbers started to slide after spring 2020, when more than 60% of days were worked from home, according to data from WFH Research, a scholarly data collection project. By 2023, that number had dropped to about 25% â' much lower than its peak but still a fivefold increase from 5% in 2019. But work-from-home numbers have held steady throughout most of 2023. And according to remote-work experts, they're expected to rebound in the years to come as companies adjust to work-from-home trends. "Return-to-office died in '23," said Nick Bloom, an economics professor at Stanford University and work-from-home expert. "There's a tombstone with 'RTO' on it...." Though a number of companies issued return-to-work mandates this year, most are allowing employees to work from home at least part of the week. That makes 2024 the year for employers to figure out the hybrid model. "We're never going to go back to a five-days-in-the-office policy," said Stephan Meier, professor of business at Columbia University. "Some employers are going to force people to come back, but I think over the next year, more and more firms will actually figure out how to manage hybrid well." Thirty-eight percent of companies require full-time in-office work, down from 39% one quarter ago and 49% at the start of the year, according to software firm Scoop Technologies... [Stanford economics professor] Bloom called remote-work numbers in 2023 "pancake-flat." Yes, large companies like Meta and Zoom made headlines by ordering workers back to the office. But, Bloom said, just as many other companies were quietly reducing office attendance to cut costs. Bloom thinks holograms and VR devices are possible within five years. "In the long run, the thing that really matters is technology." One paper estimates that currently 37% of America's jobs can be done entirely at home, according to the article, and ZipRecruiter's chief economist seems to agree, predicting as much as 33% America's work days will eventually be completed from home. "I think the numbers will gradually go up as this becomes more of an accepted norm as future generations grow up with it being so widely available, and as the technology for for doing it gets better." And the article notes that the ZipRecruiter economist sees another factor fueling the trend. "Reluctant leaders aging out of the workforce will help, too, she said."

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They create a dedicated desktop icon for your favorite web-based application — a simplified browser that opens to that single URL. Yet while Linux usually offers the same functionality as other operating systems, "Peppermint OS's Ice and its successor Kumo are the only free software versions of Site-Specific Browsers available on Linux," according to Linux magazine. "Fortunately for those who want this functionality, Peppermint OS is a Debian derivative, and both can be installed on Debian and most other derivatives." Since SSBs first appeared in 2005, they have been available on both Windows and macOS. On Linux, however, the availability has come and gone. On Linux, Firefox once had an SSB mode, but it was discontinued in 2020 on the grounds that it had multiple bugs that were time-consuming to fix and there was "little to no perceived user benefit to the feature." Similarly, Chromium once had a basic SSB menu item, Create Application Shortcut, which no longer appears in recent versions. As for GNOME Web's (Epiphany's) Install Site as Web Application, while it still appears in the menu, it is no longer functional. Today, Linux users who want to try SSBs have no choices except Ice or Kumo. Neither Ice or Kumo appears in any repository except Peppermint OS's. But because Peppermint OS installs packages from Debian 12 ("bookworm"), either can be installed to Debian or a derivative... To install successfully, at least one of Firefox, Chrome, Chromium, or Vivaldi also must be installed... Because both Ice and Kumo are written in Python, they can be run on any desktop. The article concludes that Site-Specific Browsers might make more sense "on a network or in a business where their isolation provides another layer of security. Or perhaps the time for SSBs is past and there's a reason browsers have tried to implement them, and then discarded them."

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"[F]or years it was written off," writes CNN. " 'The economics were just way out,' said Martin Soltau, CEO of the UK-based company Space Solar. "That may now be changing as the cost of launching satellites falls sharply, solar and robotics technology advances swiftly, and the need for abundant clean energy to replace planet-heating fossil fuels becomes more urgent." There's a "nexus of different technologies coming together right now just when we need it," said Craig Underwood, emeritus professor of spacecraft engineering at the University of Surrey in the U.K. The problem is, these technologies would need to be deployed at a scale unlike anything ever done before... "The big stumbling block has been simply the sheer cost of putting a power station into orbit." Over the last decade, that has begun to change as companies such as SpaceX and Blue Origin started developing reusable rockets. Today's launch costs at around $1,500 per kilogram are about 30 times less than in the Space Shuttle era of the early 1980s. And while launching thousands of tons of material into space sounds like it would have a huge carbon footprint, space solar would likely have a footprint at least comparable to terrestrial solar per unit of energy, if not a smaller, because of its increased efficiency as sunlight is available nearly constantly, said Mamatha Maheshwarappa, payload systems lead at UK Space Agency. Some experts go further. Underwood said the carbon footprint of space-based solar would be around half that of a terrestrial solar farm producing the same power, even with the rocket launch... There is still a huge gulf between concept and commercialization. We know how to build a satellite, and we know how to build a solar array, Maheshwarappa said. "What we don't know is how to build something this big in space..." Scientists also need to figure out how to use AI and robotics to construct and maintain these structures in space. "The enabling technologies are still in a very low technology readiness," Maheshwarappa said. Then there's regulating this new energy system, to ensure the satellites are built sustainably, there's no debris risk, and they have an end-of-life plan, as well as to determine where rectenna sites should be located. Public buy-in could be another huge obstacle, Maheshwarappa said. There can be an instinctive fear when it comes to beaming power from space. But such fears are unfounded, according to some experts. The energy density at the center of the rectenna would be about a quarter of the midday sun. "It is no different than standing in front of a heat lamp," Hajimiri said. The article argues that governments and companies around the world "believe there is huge promise in space-based solar to help meet burgeoning demand for abundant, clean energy and tackle the climate crisis." And they cite several specific examples: In 2020 the U.S. Naval Research Lab launched a module on an orbital test vehicle, to test solar hardware in space conditions. This year Caltech electrical engineering professor led a team that successfully launched a 30-centimeter prototype equipped with transmitters — and successfully beamed detectable energy down to earth. In June the U.K. government announced over $5 million in funding to universities and tech companies "to drive forward innovation" in the space-based solar sector. The U.S. Air Force Research Lab plans to launch a small demonstrator in 2025. Europe's its Solaris program aims to prove "the technical and political viability of space-based solar, in preparation for a possible decision in 2025 to launch a full development program." One Chinese spacecraft designer and manufacturer hopes to send a solar satellite into low orbit in 2028 and high orbit by 2030, according to a 2022 South China Morning News report.

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"Billions of people" uses social media every month, notes the Wall Street Journal.. But "fewer and fewer are actually posting." Instead they're favoring "a more passive experience, surveys of users and research from data-analytics firms say." In an October report from data-intelligence company Morning Consult, 61% of U.S. adult respondents with a social-media account said they have become more selective about what they post. The reasons are varied: People say they feel they can't control the content they see. They have become more protective about sharing their lives online. They also say the fun of social media has fizzled. This lurker mentality is widespread, across Meta Platforms' Instagram and Facebook along with X and TikTok.... In a survey conducted in the U.S. this summer, research firm Gartner found more than half of respondents believed the quality of social media has declined in the past five years. They cited misinformation, toxicity and the proliferation of bots as reasons it has gotten worse. "The less you trust social-media brands, the less of a good experience you're having," says Gartner analyst Emily Weiss. Users are less likely to share opinions or insight into their lives since the community they are looking for isn't there, she adds. Ads and suggested posts have also sucked the joy out of apps, some users say... The algorithmic spotlight on creators and their hyper-curated content has made some users feel insecure and less likely to share their own photos and videos, says Kevin Tran, media and entertainment analyst at Morning Consult. In turn, some now think of social apps more as sources of entertainment, like YouTube or Netflix. Gartner estimates that 50% of users will either abandon or significantly limit their interactions with social media in the next two years. Any threat to interacting is a threat to business, the article notes, adding "The companies are responding." They are investing in more private user experiences like messaging, and making interactions more secure. And encouraging people to post to a more intimate audience — as with Instagram's recently expanded Close Friends feature... Meta responded to user complaints, saying it would continue to work on improving recommendations to help creators reach more people. The company added a snooze button that pauses suggested posts for 30 days at a time, and chronological feeds that temporarily only show posts from accounts people follow... Meta began shifting its resources toward messaging, including efforts to enable end-to-end encryption by default across all of its messaging services... TikTok has also shown signs of investing more in the messaging portion of its app, nudging users to chat with people they haven't messaged in a while. When the Wall Street Journal posted their article on Threads, Adam Mosseri (head of Instagram) responded that "People are sharing to feeds less, but to Stories more," and "even more still" in Messages ("even photos and videos"). Mosseri also said that Instagram's Notes feature — basically a post where you cab specify a smaller subset of your followers to see it — "have quickly become a big thing, particularly for young people. "So it's no so much that people are sharing less," Mosseri argued, "but rather than they're sharing differently."

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CNN describes them as "towering waves," driven into California's coastline by powerful storms and "posing a significant risk to people and structures along the coast." Monstrous, 20-foot-plus waves on Thursday crashed over seawalls and swept away and injured several people, forced rescues and sent a damaging surge of water through coastal California streets. Dangerous waves continued to slam the coast on Friday, forcing beaches to close. All Ventura County beaches will be closed through New Year's Eve because of the 15- to 20-foot waves expected along the central and Southern California coasts through Saturday evening... Sea levels have risen along most of the California coastline over the past century, NOAA data shows, as global temperatures climb and melt glaciers and ice sheets. Higher sea levels are making coastal flooding events worse and will continue to do so in the future. The first round of dangerous waves hit alongside high tide Thursday morning. Several people were injured by a huge wave that slammed into Pierpont in the Ventura Beach area... Nearly 20 people were briefly swept away in the incident and eight people were taken to the hospital, Ventura officials said. One bystander even filmed what CNN calls a"monster" wave, "the surge sweeping people and vehicles down the street... The massive waves pummeling the coastline, reeking havoc, flooding streets and businesses." CNN's report also includes footage from nearly 300 miles north, showing a wave flooding a beachfront restaurant's courtyard in Santa Cruz, California. ("I just feel bad for the restaurants," says one local. "I know they just went through renovations from the last time this happened.") CNN's original article notes the sheriff's office there briefly issued an evacuation warning for some areas for part of Thursday, including one "where seawater filled beachside roadways and pushed against some homes, CNN affiliate KION reported." And CNN's video report concludes by noting that "Parts of the California coast could see towering waves through the weekend, coastal flood and high surf alerts stretching from the southern border to the Bay Area."

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NBC News reports that the Chinese spy balloon that flew across the U.S. in February "used an American internet service provider to communicate, according to two current and one former U.S. official familiar with the assessment." it used the American ISP connection "to send and receive communications from China, primarily related to its navigation." Officials familiar with the assessment said it found that the connection allowed the balloon to send burst transmissions, or high-bandwidth collections of data over short periods of time. The Biden administration sought a highly secretive court order from the federal Foreign Intelligence Surveillance Court to collect intelligence about it while it was over the U.S., according to multiple current and former U.S. officials. How the court ruled has not been disclosed. Such a court order would have allowed U.S. intelligence agencies to conduct electronic surveillance on the balloon as it flew over the U.S. and as it sent and received messages to and from China, the officials said, including communications sent via the American internet service provider... The previously unreported U.S. effort to monitor the balloon's communications could be one reason Biden administration officials have insisted that they got more intelligence out of the device than it got as it flew over the U.S. Senior administration officials have said the U.S. was able to protect sensitive sites on the ground because they closely tracked the balloon's projected flight path. The U.S. military moved or obscured sensitive equipment so the balloon could not collect images or video while it was overhead. NBC News is not naming the internet service provider, but says it denied that the Chinese balloon had used its network, "a determination it said was based on its own investigation and discussions it had with U.S. officials." The balloon contained "multiple antennas, including an array most likely able to collect and geolocate communications," according to reports from a U.S. State Depratment official cited by NBC News in February. "It was also powered by enormous solar panels that generated enough power to operate intelligence collection sensors, the official said. Reached for comment this week, a spokesperson for the Chinese Embassy in Washington told NBC News that the balloon was just a weather balloon that had accidentally drifted into American airspace.

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As we argue over freeing ourselves from fossil fuels, can SRM buy us time to develop green energy we need?

In-depth At the American Geophysical Union annual meeting (AGU23) in San Francisco the other week, the 25,000-plus science folks in attendance pretty much all agreed on one unequivocal fact: the Earth is warming and it's warming quickly. Discussions centered not on "if" — that's been settled — but on how to best measure that rise, how to best model it, and what best to do about it.…

An anonymous reader quotes a report from New Atlas: Researchers have developed a new, lightweight foam made from carbon nanotubes that, when used as a helmet liner, absorbed the kinetic energy caused by an impact almost 30 times better than liners currently used in US military helmets. The foam could prevent or significantly reduce the likelihood of concussion in military personnel and sportspeople. Among sportspeople and military vets, traumatic brain injury (TBI) is one of the major causes of permanent disability and death. Injury statistics show that the majority of TBIs, of which concussion is a subtype, are associated with oblique impacts, which subject the brain to a combination of linear and rotational kinetic energy forces and cause shearing of the delicate brain tissue. To improve their effectiveness, helmets worn by military personnel and sportspeople must employ a liner material that limits both. This is where researchers from the University of Wisconsin-Madison come in. Determined to prevent -- or lessen the effect of -- TBIs caused by knocks to the body and head, they've developed a new lightweight foam material for use as a helmet liner. For the current study, Thevamaran built upon his previous research into vertically aligned carbon nanotube (VACNT) foams -- carefully arranged layers of carbon cylinders one atom thick -- and their exceptional shock-absorbing capabilities. Current helmets attempt to reduce rotational motion by allowing a sliding motion between the wearer's head and the helmet during impact. However, the researchers say this movement doesn't dissipate energy in shear and can jam when severely compressed following a blow. Instead, their novel foam doesn't rely on sliding layers. VACNT foam sidesteps this shortcoming via its unique deformation mechanism. Under compression, the VACNTs undergo collective sequentially progressive buckling, from increased compliance at low shear strain levels to a stiffening response at high strain levels. The formed compression buckles unfold completely, enabling the VACNT foam to accommodate large shear strains before returning to a near initial state when the load is removed. The researchers found that at 25% precompression, the foam exhibited almost 30 times higher energy dissipation in shear -- up to 50% shear strain -- than polyurethane-based elastomeric foams of similar density. The study has been published in the journal Experimental Mechanics.

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"Predating even Toy Story, ReBoot was the first 3D animated television show," writes longtime Slashdot reader sandbagger, sharing a new report from Global News. "The master tapes have been located in storage but the hardware needed to play the 1990s-era media has yet to be located." From the report: Produced in Vancouver by Mainframe Entertainment, it aired on YTV between 1994 and 2001, and decades later still has a committed fan base. Among those super fans are Jacob Weldon and Raquel Lin, a B.C. duo now crafting a documentary about the creation of the show and its impact in the film and TV world. Weldon said he wants to see ReBoot recognized for its place in the evolution of computer animation -- recognition he said it rarely gets. When ReBoot was finally cancelled -- cut short in its fourth and final season -- its protagonists were left in peril and the show ended on a cliffhanger. It's another factor that Lin and Weldon say has helped immortalize the show and has helped fans hoping for a revival that might finally explain the characters' fate. Earlier this month, the documentary also got a potential major boost. Mainframe allowed Lin and Weldon to come to the studio to look for the show's original master tapes, recordings some believed might have been permanently lost. They struck gold. "They had boxes upon boxes upon boxes, hundreds of tapes," Lin said. "It's original resolution, original frame rate, uncompressed. If we could get a deck to play these, they would look beautiful," Weldon said. Finding that deck, however, is the pair's next major challenge. The recordings are on a rare digital tape format called D1, a technology that Weldon said was cutting edge and rare when Mainframe was using it. It's even harder to find today, and even Mainframe doesn't have the equipment to play the tapes back. Weldon and Lin have since put out a call on social media for a working Bosch BTS D1 deck that would allow them to play the tapes, and incorporate them into their documentary. "I can't tell you how many people have called us, DM'd us, emailed us -- people from all over the world," Lin said. While the pair still haven't secured the deck, they're aiming to release their documentary by next summer. They're hoping it will help renew interest in the show, introduce it to new generations and perhaps see it get new life on a streaming platform.

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SpaceX on Thursday launched two rockets into orbit, only three hours apart, bringing its total number of launches to 98 in 2023. Space.com reports: The first SpaceX mission to take to the skies Thursday (Dec. 28) was a Falcon Heavy rocket carrying the U.S. military's secretive X-37B space plane, designed mission USSF-52. That blasted off from NASA's Kennedy Space Center in Florida at 8:07 p.m. EST (0107 GMT on Dec. 29). This marked the second Falcon Heavy flight of 2023. Second up on the launch docket for Thursday, hours later, was a Falcon 9 liftoff carrying 23 SpaceX Starlink units to low Earth orbit from nearby Cape Canaveral Space Force Station. This launch took place at 11:01 p.m. EST (0401 GMT on Dec. 29). This was SpaceX's 98th and final launch of 2023, and the 96th flight for a Falcon 9 rocket this year. SpaceX's 97th launch overall for this year marked the seventh flight for X-37B, but the first time the space plane hitched a lift atop a Falcon Heavy rocket. The X-37B/Falcon Heavy launch had been scrubbed several times previously due to bad weather and an issue with ground equipment. The launch of 23 Starlink broadband satellites from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida that capped off 2023 was also the 96th launch of a Falcon 9 rocket during this year. SpaceX's next launch is targeted for Jan. 2, 2024 and will see a further 21 Starlink satellites lift to orbit to join the over 5,500 internet supplying units currently orbiting Earth.

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