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Netflix To Take On Google and Amazon By Building Its Own Ad Server (techcrunch.com) 20

Lauren Forristal writes via TechCrunch: Netflix announced during its Upfronts presentation on Wednesday that it's launching its own advertising technology platform only a year and a half after entering the ads business. This move pits it against other industry heavyweights with ad servers, like Google, Amazon and Comcast. The announcement signifies a significant shake-up in the streaming giant's advertising approach. The company originally partnered with Microsoft to develop its ad tech, letting Netflix enter the ad space quickly and catch up with rivals like Hulu, which has had its own ad server for over a decade.

With the launch of its in-house ad tech, Netflix is poised to take full control of its advertising future. This strategic move will empower the company to create targeted and personalized ad experiences that resonate with its massive user base of 270 million subscribers. [...] Netflix didn't say exactly how its in-house solution will change the way ads are delivered, but it's likely it'll move away from generic advertisements. According to the Financial Times, Netflix wants to experiment with "episodic" campaigns, which involve a series of ads that tell a story rather than delivering repetitive ads. During the presentation, Netflix also noted that it'll expand its buying capabilities this summer, which will now include The Trade Desk, Google's Display & Video 360 and Magnite as partners. Notably, competitor Disney+ also has an advertising agreement with The Trade Desk. Netflix also touted the success of its ad-supported tier, reporting that 40 million global monthly active users opt for the plan. The ad tier had around 5 million users within six months of launching.

Android

Android 15 Gets 'Private Space,' Theft Detection, and AV1 Support (arstechnica.com) 37

An anonymous reader quotes a report from Ars Technica: Google's I/O conference is still happening, and while the big keynote was yesterday, major Android beta releases have apparently been downgraded to Day 2 of the show. Google really seems to want to be primarily an AI company now. Android already had some AI news yesterday, but now that the code-red requirements have been met, we have actual OS news. One of the big features in this release is "Private Space," which Google says is a place where users can "keep sensitive apps away from prying eyes, under an additional layer of authentication."

First, there's a new hidden-by-default portion of the app drawer that can hold these sensitive apps, and revealing that part of the app drawer requires a second round of lock-screen authentication, which can be different from the main phone lock screen. Just like "Work" apps, the apps in this section run on a separate profile. To the system, they are run by a separate "user" with separate data, which your non-private apps won't be able to see. Interestingly, Google says, "When private space is locked by the user, the profile is paused, i.e., the apps are no longer active," so apps in a locked Private Space won't be able to show notifications unless you go through the second lock screen.

Another new Android 15 feature is "Theft Detection Lock," though it's not in today's beta and will be out "later this year." The feature uses accelerometers and "Google AI" to "sense if someone snatches your phone from your hand and tries to run, bike, or drive away with it." Any of those theft-like shock motions will make the phone auto-lock. Of course, Android's other great theft prevention feature is "being an Android phone." Android 12L added a desktop-like taskbar to the tablet UI, showing recent and favorite apps at the bottom of the screen, but it was only available on the home screen and recent apps. Third-party OEMs immediately realized that this bar should be on all the time and tweaked Android to allow it. In Android 15, an always-on taskbar will be a normal option, allowing for better multitasking on tablets and (presumably) open foldable phones. You can also save split-screen-view shortcuts to the taskbar now.

An Android 13 developer feature, predictive back, will finally be turned on by default. When performing the back gesture, this feature shows what screen will show up behind the current screen you're swiping away. This gives a smoother transition and a bit of a preview, allowing you to cancel the back gesture if you don't like where it's going. [...] Because this is a developer release, there are tons of under-the-hood changes. Google is a big fan of its own next-generation AV1 video codec, and AV1 support has arrived on various devices thanks to hardware decoding being embedded in many flagship SoCs. If you can't do hardware AV1 decoding, though, Android 15 has a solution for you: software AV1 decoding.

AI

Slashdot Asks: How Do You Protest AI Development? (wired.com) 170

An anonymous reader quotes a report from Wired: On a side street outside the headquarters of the Department of Science, Innovation and Technology in the center of London on Monday, 20 or so protesters are getting their chants in order. "What do we want? Safe AI! When do we want it?" The protesters hesitate. "Later?" someone offers. The group of mostly young men huddle for a moment before breaking into a new chant. "What do we want? Pause AI! When do we want it? Now!" These protesters are part of Pause AI, a group of activists petitioning for companies to pause development of large AI models which they fear could pose a risk to the future of humanity. Other PauseAI protests are taking place across the globe: In San Francisco, New York, Berlin, Rome, Ottawa, and ahandful of other cities. Their aim is to grab the attention of voters and politicians ahead of the AI Seoul Summit -- a follow-up to the AI Safety Summit held in the UK in November 2023. But the loosely organized group of protesters itself is still figuring out exactly the best way to communicate its message.

"The Summit didn't actually lead to meaningful regulations," says Joep Meindertsma, the founder of PauseAI. The attendees at the conference agreed to the "Bletchley Declaration," but that agreement doesn't mean much, Meindertsma says. "It's only a small first step, and what we need are binding international treaties." [...] There is also the question of how PauseAI should achieve its aims. On the group's Discord, some members discussed the idea of staging sit-ins at the headquarters of AI developers. OpenAI, in particular, has become a focal point of AI protests. In February, Pause AI protests gathered in front of OpenAI'sSan Francisco offices, after the company changed its usage policies to remove a ban on military and warfare applications for its products. Would it be too disruptive if protests staged sit-ins or chained themselves to the doors of AI developers, one member of the Discord asked. "Probably not. We do what we have to, in the end, for a future with humanity, while we still can." [...]

Director of Pause AI US, Holly Elmore, wants the movement to be a "broad church" that includes artists, writers, and copyright owners whose livelihoods are put at risk from AI systems that can mimic creative works. "I'm a utilitarian. I'm thinking about the consequences ultimately, but the injustice that really drives me to do this kind of activism is the lack of consent" from companies producing AI models, she says. "We don't have to choose which AI harm is the most important when we're talking about pausing as a solution. Pause is the only solution that addresses all of them." [Joseph Miller, the organizer of PauseAI's protest in London] echoed this point. He says he's spoken to artists whose livelihoods have been impacted by the growth of AI art generators. "These are problems that are real today, and are signs of much more dangerous things to come." One of the London protesters, Gideon Futerman, has a stack of leaflets he's attempting to hand out to civil servants leaving the building opposite. He has been protesting with the group since last year. "The idea of a pause being possible has really taken root since then," he says.
According to Wired, the leaders of Pause AI said they were not considering sit-ins or encampments near AI offices at this time. "Our tactics and our methods are actually very moderate," says Elmore. "I want to be the moderate base for a lot of organizations in this space. I'm sure we would never condone violence. I also want Pause AI to go further than that and just be very trustworthy."

Meindertsma agrees, saying that more disruptive action isn't justified at the moment. "I truly hope that we don't need to take other actions. I don't expect that we'll need to. I don't feel like I'm the type of person to lead a movement that isn't completely legal."

Slashdotters, what is the most effective way to protest AI development? Is the AI genie out of the bottle? Curious to hear your thoughts
AI

ChatGPT Is Getting a Mac App 9

OpenAI has launched an official macOS app for ChatGPT, with a Windows version coming "later this year." "Both free and paid users will be able to access the new app, but it will only be available to ChatGPT Plus users starting today before a broader rollout in 'the coming weeks,'" reports The Verge. From the report: In the demo shown by OpenAI, users could open the ChatGPT desktop app in a small window, alongside another program. They asked ChatGPT questions about what's on their screen -- whether by typing or saying it. ChatGPT could then respond based on what it "sees." OpenAI says users can ask ChatGPT a question by using the Option + Space keyboard shortcut, as well as take and discuss screenshots within the app. Further reading: OpenAI Launches New Free Model GPT-4o
Linux

Linux Kernel 6.9 Officially Released (9to5linux.com) 49

"6.9 is now out," Linus Torvalds posted on the Linux kernel mailing list, "and last week has looked quite stable (and the whole release has felt pretty normal)."

Phoronix writes that Linux 6.9 "has a number of exciting features and improvements for those habitually updating to the newest version." And Slashdot reader prisoninmate shared this report from 9to5Linux: Highlights of Linux kernel 6.9 include Rust support on AArch64 (ARM64) architectures, support for the Intel FRED (Flexible Return and Event Delivery) mechanism for improved low-level event delivery, support for AMD SNP (Secure Nested Paging) guests, and a new dm-vdo (virtual data optimizer) target in device mapper for inline deduplication, compression, zero-block elimination, and thin provisioning.

Linux kernel 6.9 also supports the Named Address Spaces feature in GCC (GNU Compiler Collection) that allows the compiler to better optimize per-CPU data access, adds initial support for FUSE passthrough to allow the kernel to serve files from a user-space FUSE server directly, adds support for the Energy Model to be updated dynamically at run time, and introduces a new LPA2 mode for ARM 64-bit processors...

Linux kernel 6.9 will be a short-lived branch supported for only a couple of months. It will be succeeded by Linux kernel 6.10, whose merge window has now been officially opened by Linus Torvalds. Linux kernel 6.10 is expected to be released in mid or late September 2024.

"Rust language has been updated to version 1.76.0 in Linux 6.9," according to the article. And Linus Torvalds shared one more details on the Linux kernel mailing list.

"I now have a more powerful arm64 machine (thanks to Ampere), so the last week I've been doing almost as many arm64 builds as I have x86-64, and that should obviously continue during the upcoming merge window too."
Space

Webb Telescope Finds a (Hot) Earth-Sized Planet With an Atmosphere (apnews.com) 28

An anonymous reader shared this report from the Associated Press: A thick atmosphere has been detected around a planet that's twice as big as Earth in a nearby solar system, researchers reported Wednesday.

The so-called super Earth — known as 55 Cancri e — is among the few rocky planets outside our solar system with a significant atmosphere, wrapped in a blanket of carbon dioxide and carbon monoxide. The exact amounts are unclear. Earth's atmosphere is a blend of nitrogen, oxygen, argon and other gases. "It's probably the firmest evidence yet that this planet has an atmosphere," said Ian Crossfield, an astronomer at the University of Kansas who studies exoplanets and was not involved with the research.

The research was published in the journal Nature.

"The boiling temperatures on this planet — which can reach as hot as 4,200 degrees Fahrenheit (2,300 degrees Celsius) — mean that it is unlikely to host life," the article points out.

"Instead, scientists say the discovery is a promising sign that other such rocky planets with thick atmospheres could exist that may be more hospitable."
Space

Is Dark Matter's Main Rival Theory Dead? (theconversation.com) 87

"One of the biggest mysteries in astrophysics today is that the forces in galaxies do not seem to add up," write two U.K. researchers in the Conversation: Galaxies rotate much faster than predicted by applying Newton's law of gravity to their visible matter, despite those laws working well everywhere in the Solar System. To prevent galaxies from flying apart, some additional gravity is needed. This is why the idea of an invisible substance called dark matter was first proposed. But nobody has ever seen the stuff. And there are no particles in the hugely successful Standard Model of particle physics that could be the dark matter — it must be something quite exotic.

This has led to the rival idea that the galactic discrepancies are caused instead by a breakdown of Newton's laws. The most successful such idea is known as Milgromian dynamics or Mond [also known as modified Newtonian dynamics], proposed by Israeli physicist Mordehai Milgrom in 1982. But our recent research shows this theory is in trouble...

Due to a quirk of Mond, the gravity from the rest of our galaxy should cause Saturn's orbit to deviate from the Newtonian expectation in a subtle way. This can be tested by timing radio pulses between Earth and Cassini. Since Cassini was orbiting Saturn, this helped to measure the Earth-Saturn distance and allowed us to precisely track Saturn's orbit. But Cassini did not find any anomaly of the kind expected in Mond. Newton still works well for Saturn... Another test is provided by wide binary stars — two stars that orbit a shared centre several thousand AU apart. Mond predicted that such stars should orbit around each other 20% faster than expected with Newton's laws. But one of us, Indranil Banik, recently led a very detailed study that rules out this prediction. The chance of Mond being right given these results is the same as a fair coin landing heads up 190 times in a row. Results from yet another team show that Mond also fails to explain small bodies in the distant outer Solar System...

The standard dark matter model of cosmology isn't perfect, however. There are things it struggles to explain, from the universe's expansion rate to giant cosmic structures. So we may not yet have the perfect model. It seems dark matter is here to stay, but its nature may be different to what the Standard Model suggests. Or gravity may indeed be stronger than we think — but on very large scales only.

"Ultimately though, Mond, as presently formulated, cannot be considered a viable alternative to dark matter any more," the researchers conclude. "We may not like it, but the dark side still holds sway."
Power

Are Small Modular Nuclear Reactors Costly and Unviable? (cosmosmagazine.com) 215

The Royal Institution of Australia is a national non-profit hub for science communication, publishing the science magazine Cosmos four times a year.

This month they argued that small modular nuclear reactors "don't add up as a viable energy source." Proponents assert that SMRs would cost less to build and thus be more affordable. However, when evaluated on the basis of cost per unit of power capacity, SMRs will actually be more expensive than large reactors. This 'diseconomy of scale' was demonstrated by the now-terminated proposal to build six NuScale Power SMRs (77 megawatts each) in Idaho in the United States. The final cost estimate of the project per megawatt was around 250 percent more than the initial per megawatt cost for the 2,200 megawatts Vogtle nuclear power plant being built in Georgia, US. Previous small reactors built in various parts of America also shut down because they were uneconomical.
The cost was four to six times the cost of the same electricity from wind and solar photovoltaic plants, according to estimates from the Australian Commonwealth Scientific and Industrial Research Organisation and the Australian Energy Market Operator. "The money invested in nuclear energy would save far more carbon dioxide if it were instead invested in renewables," the article agues: Small reactors also raise all of the usual concerns associated with nuclear power, including the risk of severe accidents, the linkage to nuclear weapons proliferation, and the production of radioactive waste that has no demonstrated solution because of technical and social challenges. One 2022 study calculated that various radioactive waste streams from SMRs would be larger than the corresponding waste streams from existing light water reactors...

Nuclear energy itself has been declining in importance as a source of power: the fraction of the world's electricity supplied by nuclear reactors has declined from a maximum of 17.5 percent in 1996 down to 9.2 percent in 2022. All indications suggest that the trend will continue if not accelerate. The decline in the global share of nuclear power is driven by poor economics: generating power with nuclear reactors is costly compared to other low-carbon, renewable sources of energy and the difference between these costs is widening.

Thanks to Slashdot reader ZipNada for sharing the article.
Earth

The World's Largest Vaccuum to Suck Climate Pollution From the Air Just Began Operating (cnn.com) 134

An anonymous reader shared this report from CNN: The "world's largest" plant designed to suck planet-heating pollution out of the atmosphere like a giant vacuum began operating in Iceland on Wednesday. "Mammoth" is the second commercial direct air capture plant opened by Swiss company Climeworks in the country, and is 10 times bigger than its predecessor, Orca, which started running in 2021... Climeworks plans to transport the carbon underground where it will be naturally transformed into stone, locking up the carbon permanently... The whole operation will be powered by Iceland's abundant, clean geothermal energy....

Climeworks started building Mammoth in June 2022, and the company says it is the world's largest such plant. It has a modular design with space for 72 "collector containers" — the vacuum parts of the machine that capture carbon from the air — which can be stacked on top of each other and moved around easily. There are currently 12 of these in place with more due to be added over the next few months. Mammoth will be able to pull 36,000 tons of carbon from the atmosphere a year at full capacity, according to Climeworks. That's equivalent to taking around 7,800 gas-powered cars off the road for a year...

All the carbon removal equipment in the world is only capable of removing around 0.01 million metric tons of carbon a year, a far cry from the 70 million tons a year needed by 2030 to meet global climate goals, according to the International Energy Agency [7,000x more]... Jan Wurzbacher, the company's co-founder and co-CEO, said Mammoth is just the latest stage in Climeworks' plan to scale up to 1 million tons of carbon removal a year by 2030 and 1 billion tons by 2050. Plans include potential DAC plants in Kenya and the United States.

Moon

NASA's Plan To Build a Levitating Robot Train on the Moon (livescience.com) 28

"Does a levitating robot train on the moon sound far-fetched?" asks LiveScience.

"NASA doesn't seem to think so, as the agency has just greenlit further funding for a study looking into the concept." The project, called "Flexible Levitation on a Track" (FLOAT), has been moved to phase two of NASA's Innovative Advanced Concepts program (NIAC) , which aims to develop "science fiction-like" projects for future space exploration. The FLOAT project could result in materials being transported across the moon's surface as soon as the 2030s, according to the agency... According to NASA's initial design, FLOAT will consist of magnetic robots levitating over a three-layer film track to reduce abrasion from dust on the lunar surface. Carts will be mounted on these robots and will move at roughly 1 mph (1.61 km/h). They could transport roughly 100 tons (90 metric tons) of material a day to and from NASA's future lunar base.
"A durable, long-life robotic transport system will be critical to the daily operations of a sustainable lunar base in the 2030's," according to NASA's blog post, arguing it could be used to
  • Transport moon materials mined to produce on-site resources like water, liquid oxygen, liquid hydrogen, or construction materials
  • Transport payloads around the lunar base and to and from landing zones or other outposts

Thanks to long-time Slashdot reader AmiMoJo for sharing the article.


Transportation

Bike Brands Start To Adopt C-V2X To Warn Cyclists About Cars (arstechnica.com) 157

An anonymous reader quotes a report from Ars Technica: There's a fundamental flaw in current car safety tech: It's limited to line of sight. Or, perhaps, line of "sensing" is more accurate, because the way cameras and lidar work is to inspect the perimeter of a vehicle and use predictive algorithms to understand the motion of an object in relation to the motion of the vehicle itself. Which is good, because as carmakers have added elements such as pedestrian and cyclist detection, they're trying to prevent drivers from hurting the most vulnerable road users. And unfortunately this is necessary, because even though 2023 saw a slight reduction in drivers striking cyclists and pedestrians, according to the most recent data from the Governor's Highway Safety Association, since 2019 pedestrian fatalities are still up 14 percent -- and cyclist deaths are up 50 percent since 2010. That doesn't mean lidar and cameras have "failed," but because they rely on what the sensors can pick up, they cannot necessarily ID hazards (and alert drivers) as quickly as we need them to, particularly if that's a cyclist in your lane 300 feet down the road, just over the next rise. Yes, current sensing works well now with figuring out the pace of a traffic jam, and automatic emergency braking can step in to stop your car if you fail to. But for non-automotive obstacles, they're still limited.

For that, we need better tech, which is emerging and is called Connected Vehicle to Everything (C-V2X). The idea isn't that complicated. Boiled down, it's a chipset that operates on a portion of the cellular bandwidth, and vehicles with this tech embedded (say in an e-bike or car) monitor anything with a C-V2X chip as well as broadcast their own location at a pulse of 10 times a second. This precision location system would then warn a driver of a cyclist on the road ahead, even beyond line of sight, and in an emergency -- possibly because a cyclist was right in a car's path -- could prevent a collision. [W]ith C-V2X, you don't need Verizon or ATT or anything like that," explains Audi's Kamal Kapadia. Because it isn't using the cellular network -- it's using a portion of cellular bandwidth to allow direct object, or vehicle-to-vehicle, communication. Audi has been working on C-V2X for nearly a decade, and it's part of a group in the US called the Coalition for Cyclist Safety, which also includes suppliers like Bosch, a tech startup in the space called Spoke Safety, and bike brands such as massive Trek, parts supplier Shimano, more niche bikemakers like Switzerland's Stromer, as well as mega telco suppliers and networks such as Qualcomm, Deutsche Telekom, and TELUS. [...]

Mio Suzuki is Trek Bicycle's director of embedded systems, "and we are exploring all sorts of safety," she says. For instance, Trek recently introduced its own radar tail light, which warns riders of a car approaching rapidly -- Garmin has had similar systems for several years. But Suzuki is intrigued by C-V2X because it offers more advanced warning than rear-facing radar. "And unlike cars, we have a very vulnerable road user so we need to augment our senses and the rider's awareness of the riding environment, because we don't have a big metal shield around us." What Suzuki envisions this direct communication might enable is an e-bike where the rider has a display that would warn a rider "of an imminent danger that's approaching; a car might be coming from the side, but the view of the car is obstructed by a building, so the rider can't see." Franz Reindl is CTO of Stromer, a high-end Swiss brand that only makes e-bikes with very top tech, including ABS brakes. Reindl says they're also studying C-V2X. "Safety is one of our biggest promises, and we need to do everything we can with products and technologies to make it more safe for customers."
Right now, only Audi and the VW Group have openly talked about using the tech. "Trek's Suzuki thinks that together, the Coalition and so many bike brands within it do have a strong voice," reports Ars. "She also envisions municipalities deploying the technology, especially around work crews and EMS, which should build broader momentum and pressure on automakers."
Earth

G5 Severe Geomagnetic Storm Watch Issued For First Time Since 2003 (axios.com) 32

Longtime Slashdot reader davidwr shares a report from Space Weather Prediction Center (SWPC): On Thursday, May 9, 2024, the NOAA Space Weather Prediction Center issued a Severe (G4) Geomagnetic Storm Watch. At least five earth-directed coronal mass ejections (CMEs) were observed and expected to arrive as early as midday Friday, May 10, 2024, and persist through Sunday, May 12, 2024. Several strong flares have been observed over the past few days and were associated with a large and magnetically complex sunspot cluster (NOAA region 3664), which is 16 times the diameter of Earth. [The agency notes this is the first time it's issued a G4 watch since January, 2005.] "Geomagnetic storms can impact infrastructure in near-Earth orbit and on Earth's surface, potentially disrupting communications, the electric power grid, navigation, radio and satellite operations," NOAA said. "[The Space Weather Prediction Center] has notified the operators of these systems so they can take protective action." The agency said it will continue to monitor the ongoing storm and "provide additional warnings as necessary."

A visual byproduct of the storm will be "spectacular displays of aurora," also known as the Northern Lights, that could be seen for much of the northern half of the country "as far south as Alabama to northern California," said the NOAA. "Northern Montana, Minnesota, Wisconsin and the majority of North Dakota appear to have the best chances to see it," reports Axios, citing the SWPC's aurora viewline. "Forecast models Friday showed the activity will likely be the strongest from Friday night to Saturday morning Eastern time."

UPDATE 6:54 P.M. EDT: G5 conditions have been observed -- the first time since 2003, says Broadcast Meteorologist James Spann.

This is a developing story. More information is available at spaceweather.gov, Google News, and the NOAA.
Medicine

The Most Detailed 3D Reconstruction of Human Brain Tissue (interestingengineering.com) 25

An anonymous reader quotes a report from Interesting Engineering: Imagine exploring the intricate world within a single cubic millimeter of human brain tissue. It might seem insignificant, but within that tiny space lies a universe of complexity -- 57,000 individual cells, 230 millimeters of blood vessels, and a staggering 150 million synapses, the junctions where neurons communicate. All this information translates to a mind-boggling 1,400 terabytes of data. That's the kind of groundbreaking achievement researchers from Harvard and Google have just accomplished.

Leading the charge at Harvard is Professor Jeff Lichtman, a renowned expert in brain structure. Partnering with Google AI, Lichtman's team has co-created the most detailed 3D reconstruction of a human brain fragment to date. This intricate map, published in Science, offers an unprecedented view of the human temporal cortex, the region responsible for memory and other higher functions. Envision a piece of brain tissue roughly half the size of a rice grain but magnified to reveal every cell and its web of neural connections in vivid detail. This remarkable feat is the culmination of nearly a decade of collaboration between Harvard and Google. Lichtman's expertise in electron microscopy imaging is combined with Google's cutting-edge AI algorithms. [...]

The newly published map in Science reveals previously unseen details of brain structure. One such discovery is a rare but powerful set of axons, each connected by up to 50 synapses, potentially influencing a significant number of neighboring neurons. The team also encountered unexpected structures, like a small number of axons forming intricate whorls. Since the sample came from a patient with epilepsy, it's unclear if these formations are specific to the condition or simply uncommon occurrences.

Mars

NASA's Proposed Plasma Rocket Would Get Us to Mars in 2 Months (gizmodo.com) 176

Last week, NASA announced it is working with a technology development company on a new propulsion system that could transport humans to Mars in only two months -- down from the current nine month journey required to reach the Red Planet. Gizmodo reports: NASA's Innovative Advanced Concepts (NIAC) program recently selected six promising projects for additional funding and development, allowing them to graduate to the second stage of development. The new "science fiction-like concepts," as described by John Nelson, NIAC program executive at NASA, include a lunar railway system and fluid-based telescopes, as well as a pulsed plasma rocket.

The potentially groundbreaking propulsion system is being developed by Arizona-based Howe Industries. To reach high velocities within a shorter period of time, the pulsed plasma rocket would use nuclear fission -- the release of energy from atoms splitting apart -- to generate packets of plasma for thrust. It would essentially produce a controlled jet of plasma to help propel the rocket through space. Using the new propulsion system, and in terms of thrust, the rocket could potentially generate up to 22,481 pounds of force (100,000 Newtons) with a specific impulse (Isp) of 5,000 seconds, for remarkably high fuel efficiency. [...]

The pulsed plasma rocket would also be capable of carrying much heavier spacecraft, which can be then equipped with shielding against galactic cosmic rays for the crew on board. Phase 2 of NIAC is focused on assessing the neutronics of the system (how the motion of the spacecraft interacts with the plasma), designing the spacecraft, power system, and necessary subsystems, analyzing the magnetic nozzle capabilities, and determining trajectories and benefits of the pulsed plasma rocket, according to NASA.

Earth

Heat Waves In North Pacific May Be Due To China Reducing Aerosols 54

Computer models have found that recent heat waves in the north Pacific may be due to a large reduction in aerosols emitted by factories in China. The findings have been published in the Proceedings of the National Academy of Sciences. Phys.Org reports: In this new effort, the research team noted that the onset of the heat waves appeared to follow successful efforts by the Chinese government to reduce aerosol emissions from their country's factories. Beginning around 2010, factories and power generating plants in China began dramatically reducing emissions of aerosols such as sulfate, resulting in much cleaner air. Noting that aerosols can act like mirrors floating in the air, reflecting heat from the sun back into space, and also pointing out that earlier research efforts had suggested that massive reductions of aerosols in one place could lead to warming in other places -- they wondered if reductions of aerosols in China might be playing a role in the heat waves that began happening in the north Pacific.

To find out if that might be the case, the team began collecting data and then input it into 12 different computer climate models. They ran them under two conditions -- one where emissions from East Asia remained as they were over the past several decades and one where they dropped in the way they had in reality. They found that the models with no declines did not cause much change elsewhere, whereas those with aerosol drops showed heat waves occurring in the northeast parts of the Pacific Ocean.

The models also showed why -- as less heat was reflected back into space over China, warming of coastal regions in Asia began, resulting in the development of high-pressure systems. That in turn made low-pressure systems in the middle Pacific more intense. And that resulted in the Aleutian Low growing bigger and moving south which weakened the westerly winds that typically cool the sea surface. The result was hotter conditions.
Transportation

Minor Car Crashes Mean High Tech Repairs (cnn.com) 105

"With all the improvements in car safety over the decades, the recent addition of a plethora of high tech sensors and warnings comes with increased costs," writes longtime Slashdot reader smooth wombat. "And not just to have to have them on your car. Any time you get into an accident, even a minor one, it will most likely require a detailed examination of any sensors which may have been affected and their subsequent realignment, replacement, and calibration." CNN reports: Some vehicles require "dynamic calibration," which means, once the sensors and cameras are back in place, a driver needs to take the vehicle out on real roads for testing. With proper equipment attached the car can, essentially, recalibrate itself as it watches lane lines and other markers. It requires the car to be driven for a set distance at a certain speed but weather and traffic can create problems. "If you're in Chicago or L.A., good luck getting to that speed," said [Hami Ebrahimi, chief commercial officer at Caliber] "or if you're in Seattle or Chicago or New York, with snow, good luck picking up all the road markings."

More commonly, vehicles need "static calibration," which can be done using machinery inside a closed workshop with a flat, level floor. Special targets are set up around the vehicle at set distances according to instructions from the vehicle manufacturer. "The car [views] those targets at those specific distances to recalibrate the world into the car's computer," Ebrahimi said. These kinds of repairs also demand buildings with open space that meet requirements including specific colors and lighting. And it requires special training for employees to perform these sorts of recalibrations, he said

"The change that we've seen in the last five years is greater than we've seen, probably, in the last five decades," said Todd Dillender, chief operating officer of Caliber Collision, one of the biggest auto body repair companies in the United States with more than 1,700 locations across 41 states. [...] With a rapidly changing industry, qualified auto body repair technicians are in short supply, just as they are in the engine repair business. That's also led to upward pressure on pay in the industry as technicians have to be highly qualified and educated, Dillender said. That's good for people who work in the industry, of course, but tougher for those who pay, and for the insurance companies who, in turn, pay for the repairs.
A new study from consumer automotive group AAA says the cost to fix sensors and cameras in new vehicles "now accounts for more than a third of the post-crash repair costs," reports CNN. However, "no one, including AAA, recommends not getting these features because of repair costs," since many of them can cut crash rates in half and improve a car's overall safety.

"They're not going to prevent everything," said Greg Brannon, director of automotive engineering at AAA. "And when you are in a crash, there are additional costs so it's sort of the old 'there's no free ride' when it comes to these things."
Games

Jane Street Gets Into Mobile Gaming (ft.com) 11

Financial Times Alphaville: Look, we know we write a lot about Jane Street, but it's a fascinating place, and people seem interested in it. So it was hard to resist writing about the trading shop entering the mobile phone game space (kinda). Back in 2013 Jane Street developed a card game called "Figgie," which it made to simulate open outcry trading, teach trading nous, and generally burnish its reputation for quirkiness -- de rigueur in the industry.

All you need are 40 cards from a normal deck, and the rules have been public for a while. During Covid, Jane Street made a virtual version for remote interns. Now it's a mobile game that's publicly available on the official Apple and Google app stores.

Space

Boeing Starliner's First Crewed Mission Scrubbed (techcrunch.com) 45

"Out of an abundance of caution," Boeing says its historic Starliner launch has been postponed, citing an issue with the oxygen relief valve on the Atlas V rocket's upper stage. It was expected to launch tonight at 10:34 p.m. ET. TechCrunch reports: There are backup launch opportunities on May 7, 10 and 11. After years of delays and over $1 billion in cost overruns, the mission is set to be Boeing's first attempt to transport astronauts to the International Space Station. Once the issue is resolved with the upper stage, the United Launch Alliance Atlas V will carry the CST-100 Starliner capsule to orbit along with the two onboard astronauts -- Butch Wilmore and Sunny Williams -- from Florida's Cape Canaveral at 10:34 PM local time Monday evening. The mission also marks the first time ULA's Atlas will carry crew. The rocket boasts a success rate of 100% across 99 missions. (ULA is a joint venture of Boeing and Lockheed Martin.)

The astronauts would now dock at the station at the earliest on Thursday, where they would remain for at least eight days. The two astronauts will return to Earth in the capsule no earlier than May 16. If all goes to plan, Boeing will be able to finally certify its Starliner for human transportation and begin fulfilling the terms of its $4.2 billion NASA astronaut taxi contract. That contract, under the agency's Commercial Crew Program, was awarded in 2014. Elon Musk's SpaceX was also granted a contract under that program, for its Crew Dragon capsule, and has been transporting astronauts to and from the ISS since 2020.

Cloud

Alternative Clouds Are Booming As Companies Seek Cheaper Access To GPUs (techcrunch.com) 13

An anonymous reader quotes a report from TechCrunch: CoreWeave, the GPU infrastructure provider that began life as a cryptocurrency mining operation, this week raised $1.1 billion in new funding from investors, including Coatue, Fidelity and Altimeter Capital. The round brings its valuation to $19 billion post-money and its total raised to $5 billion in debt and equity -- a remarkable figure for a company that's less than 10 years old. It's not just CoreWeave. Lambda Labs, which also offers an array of cloud-hosted GPU instances, in early April secured a "special purpose financing vehicle" of up to $500 million, months after closing a $320 million Series C round. The nonprofit Voltage Park, backed by crypto billionaire Jed McCaleb, last October announced that it's investing $500 million in GPU-backed data centers. And Together AI, a cloud GPU host that also conducts generative AI research, in March landed $106 million in a Salesforce-led round.

So why all the enthusiasm for -- and cash pouring into -- the alternative cloud space? The answer, as you might expect, is generative AI. As the generative AI boom times continue, so does the demand for the hardware to run and train generative AI models at scale. GPUs, architecturally, are the logical choice for training, fine-tuning and running models because they contain thousands of cores that can work in parallel to perform the linear algebra equations that make up generative models. But installing GPUs is expensive. So most devs and organizations turn to the cloud instead. Incumbents in the cloud computing space -- Amazon Web Services (AWS), Google Cloud and Microsoft Azure -- offer no shortage of GPU and specialty hardware instances optimized for generative AI workloads. But for at least some models and projects, alternative clouds can end up being cheaper -- and delivering better availability.

On CoreWeave, renting an Nvidia A100 40GB -- one popular choice for model training and inferencing -- costs $2.39 per hour, which works out to $1,200 per month. On Azure, the same GPU costs $3.40 per hour, or $2,482 per month; on Google Cloud, it's $3.67 per hour, or $2,682 per month. Given generative AI workloads are usually performed on clusters of GPUs, the cost deltas quickly grow. "Companies like CoreWeave participate in a market we call specialty 'GPU as a service' cloud providers," Sid Nag, VP of cloud services and technologies at Gartner, told TechCrunch. "Given the high demand for GPUs, they offers an alternate to the hyperscalers, where they've taken Nvidia GPUs and provided another route to market and access to those GPUs." Nag points out that even some Big Tech firms have begun to lean on alternative cloud providers as they run up against compute capacity challenges.
Microsoft signed a multi-billion-dollar deal with CoreWeave last June to help provide enough power to train OpenAI's generative AI models.

"Nvidia, the furnisher of the bulk of CoreWeave's chips, sees this as a desirable trend, perhaps for leverage reasons; it's said to have given some alternative cloud providers preferential access to its GPUs," reports TechCrunch.
Star Wars Prequels

How 'Star Wars' was Influenced by San Francisco - and Architecture (sfgate.com) 49

"Without San Francisco, Star Wars wouldn't exist," says David Reat, the culture studies director of the architecture department at Glasgow's University of Strathclyde.

SFGate reports: Lucas was born and raised in Modesto, where his father expected him to run the family stationery store once he turned 18, but Lucas instead left for Los Angeles, where he studied film production at the University of Southern California, before moving to San Francisco. Despite all that these cities had to offer, Lucas constantly found himself conflicted over his feelings toward them. "The battle of living in the country versus living in the city is huge with Lucas," says Reat, who notes that this theme runs throughout the likes of "THX 1138," "American Graffiti" and the "Star Wars" series. "He sees cities as the givers and takers of things. He's fascinated by cities. He doesn't actually want to live in one. He now lives in a ranch near one. He wants to orbit them. He's a paradox."

When Lucas moved to San Francisco in the late 1960s, there were a number of huge building projects taking place across the city that piqued the burgeoning filmmaker's interest, most notably the construction of BART and a new terminal at San Francisco airport. "Infrastructure really fascinated Lucas. They were these big huge alienating spaces," says Reat. "I think Lucas was driving around San Francisco, looking at them, and seeing that they looked alien." There's a reason why Lucas was particularly interested in the architecture in San Francisco: "He's on record as saying he wanted to be an architect," says Reat. "He has referred to himself as a frustrated architect." Lucas' interest provoked him and his creative team to put extra care and thought into each of the "Star Wars" buildings, vehicles, houses, villages, cities, worlds and galaxies, especially when it came to what they symbolized and represented.

"The architecture in the films play a key role for younger viewers," says Reat, explaining that it helps to indicate who is good and who is evil. When it comes to the Death Star there are "no women, no plants, no signs of life, and it's basically the Nazis in space," continues Reat. "Lucas doesn't like modernism. He always uses it for bad things, a bit like every James Bond baddie." Meanwhile, Luke Skywalker and the rest of the light side of the Force are seen living in "exaggerated domesticity" as they sit around drinking blue milk, surrounded by creatures. "There's a care and a weirdness to their architecture, plus it's loaded with color," says Reat, who adds that these choices help to make those characters more appealing and relatable....

The San Francisco International Airport also played a key role in the making of "Phantom Menace." A tour of its maintenance bay gave the film's creative designers a jolt of inspiration when they were creating Anakin's podracer and other vehicles.

The article also adds that the inspiration for the Theed Royal Palace on Naboo in The Phantom Menace was "the Marin County Civic Center, where Lucas once served jury duty."

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