Long-time Slashdot reader BishopBerkeley writes: Varjo follows a completely different model from Apple and Meta for its new AR headset. Computing is done on a connected (via a cable) computer. The tradeoff is that the headset can use the extra computing power of the host computer to drive ultrahigh resolution displays that are far more pixel dense than Apple’s Vision Pro.

The net result is that the headset is truly useful for demanding applications like professional flight simulators, where $10,000 for a headset is a sensible investment. Furthermore, the headset has a longer life span because its PC resident hardware and software are upgradeable.

From IEEE Spectrum:

The Meta Quest 3 is a capable, accessible mixed-reality device. But if you’re a mad scientist working on a secret project in an underground lab, it’s not going to cut it. Finnish headset manufacturer Varjo has a solution: the XR-4, a new generation of flagship mixed-reality headsets built for unusually demanding users. Varjo, based in Helsinki, serves up displays with record-setting pixel counts, auto-focusing cameras, and a “Secure Edition” that looks like it was ripped straight from a Bond film. The goal? A photo-real mixed-reality experience that lets designers, researchers, and creatives build and work with objects that don’t yet physically exist.
“How do you design a car without a clay prototype? How do you sell a yacht you haven’t built yet? How do you train a pilot to fly a plane that’s still on the ground?” says Patrick Wyatt, Varjo’s chief product officer. “Jobs you do right now with physical things, we’re virtualizing those.”
Varjo’s XR-4 headset comes in three different editions, each with escalating features (and price tags). The “entry-level” XR-4, which starts at €3,990 (about US $4,300), homes in on product design and data visualization work that requires crisp virtual reality alongside occasional use of mixed reality. Varjo achieves this with dual 4K displays that leapfrog even the resolution of Apple’s upcoming Vision Pro headset… Simulators might benefit from the XR-4’s more expensive sibling: the XR-4 Focal Edition. Priced at €9,990 (about $11,000), it justifies its cost with dual gaze-directed autofocus cameras… The Secure Edition is available with fixed-focused or autofocus cameras and priced at €7,990 and €13,990 ($8,700 and $15,200), respectively.

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Source: Slashdot – Varjo’s XR-4: Why a Truly Useful Mixed Reality Headset Is Expensive

“As of this year, all new Mac computers are powered by Apple’s own silicon, ending the company’s 15-plus years of reliance on Intel,” according to a new report from CNBC.
“Apple’s silicon team has grown to thousands of engineers working across labs all over the world, including in Israel, Germany, Austria, the U.K. and Japan. Within the U.S., the company has facilities in Silicon Valley, San Diego and Austin, Texas…”

The latest A17 Pro announced in the iPhone 15 Pro and Pro Max in September enables major leaps in features like computational photography and advanced rendering for gaming. “It was actually the biggest redesign in GPU architecture and Apple silicon history,” said Kaiann Drance, who leads marketing for the iPhone. “We have hardware accelerated ray tracing for the first time. And we have mesh shading acceleration, which allows game developers to create some really stunning visual effects.” That’s led to the development of iPhone-native versions from Ubisoft’s Assassin’s Creed Mirage, The Division Resurgence and Capcom’s Resident Evil 4.

Apple says the A17 Pro is the first 3-nanometer chip to ship at high volume. “The reason we use 3-nanometer is it gives us the ability to pack more transistors in a given dimension. That is important for the product and much better power efficiency,” said the head of Apple silicon, Johny Srouji . “Even though we’re not a chip company, we are leading the industry for a reason.” Apple’s leap to 3-nanometer continued with the M3 chips for Mac computers, announced in October. Apple says the M3 enables features like 22-hour battery life and, similar to the A17 Pro, boosted graphics performance…

In a major shift for the semiconductor industry, Apple turned away from using Intel’s PC processors in 2020, switching to its own M1 chip inside the MacBook Air and other Macs. “It was almost like the laws of physics had changed,” Ternus said. “All of a sudden we could build a MacBook Air that’s incredibly thin and light, has no fan, 18 hours of battery life, and outperformed the MacBook Pro that we had just been shipping.” He said the newest MacBook Pro with Apple’s most advanced chip, the M3 Max, “is 11 times faster than the fastest Intel MacBook Pro we were making. And we were shipping that just two years ago.” Intel processors are based on x86 architecture, the traditional choice for PC makers, with a lot of software developed for it. Apple bases its processors on rival Arm architecture, known for using less power and helping laptop batteries last longer.

Apple’s M1 in 2020 was a proving point for Arm-based processors in high-end computers, with other big names like Qualcomm — and reportedly AMD and Nvidia — also developing Arm-based PC processors. In September, Apple extended its deal with Arm through at least 2040.
Since Apple first debuted its homegrown semiconductors in 2010 in the iPhone 4, other companies started pursuing their own custom semiconductor development, including Amazon, Google, Microsoft and Tesla.

CNBC reports that Apple is also reportedly working on its own Wi-Fi and Bluetooth chip. Apple’s Srouji wouldn’t comment on “future technologies and products” but told CNBC “we care about cellular, and we have teams enabling that.”

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Source: Slashdot – Apple’s Chip Lab: Now 15 Years Old With Thousands of Engineers

A pull request has been merged to fix a data corruption issue in OpenZFS (the open-source implementation of the ZFS file system and volume manager). “OpenZFS 2.2.2 and 2.1.14 released with fix in place,” reports a Thursday comment on GitHub.

Earlier this week, jd (Slashdot reader #1,658) wrote: All versions of OpenZFS 2.2 suffer from a defect that can corrupt the data. Attempts to mitigate the bug have reduced the likelihood of it occurring, but so far nobody has been able to pinpoint what is going wrong or why.

Phoronix reported on Monday: Over the US holiday weekend it became more clear that this OpenZFS data corruption bug isn’t isolated to just the v2.2 release — older versions are also susceptible — and that v2.2.1 is still prone to possible data corruption. The good news at least is that data corruption in real-world scenarios is believed to be limited but with some scripting help the corruption can be reproduced. It’s also now believed that the OpenZFS 2.2 block cloning feature just makes encountering the problem more likely.

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Source: Slashdot – OpenZFS Fixes Data Corruption Issue

Consumer Reports awarded a “recommended” rating to Tesla’s Modey Y this year, “with owners reporting fewer issues with its suspension, in-car electronics and general build quality than in previous years”. Tesla’s Model 3 also earned a “recommended” rating.

“Tesla’s Model 3 and Model Y are now the sweet spot in the automotive industry when it comes to building electric cars,” says Jake Fisher, the senior director of auto testing for Consumer Reports. “While Tesla is still a relatively new car company, it has more experience producing EVs than any other automaker.”
But how about the larger universe of all automakers?
Electric vehicle owners continue to report far more problems with their vehicles than owners of conventional cars or hybrids, according to Consumer Reports’ newly released annual car reliability survey. The survey reveals that, on average, EVs from the past three model years had 79 percent more problems than conventional cars…
“Most electric cars today are being manufactured by either legacy automakers that are new to EV technology, or by companies like Rivian that are new to making cars,” says Jake Fisher, senior director of auto testing at Consumer Reports. “It’s not surprising that they’re having growing pains and need some time to work out the bugs.” Fisher says some of the most common problems EV owners report are issues with electric drive motors, charging, and EV batteries…

This year’s survey data show that hybrids continue to be among the most reliable vehicle type: Hybrids have 26 percent fewer problems than conventional models, even though they have both a conventional powertrain and an electric motor and therefore more potential problem spots than conventional cars. “It might not seem that long ago, but Toyota launched the Prius hybrid about 25 years ago,” Elek says. “Automakers have been making hybrids long enough that they’ve gotten really good at it. Plus, many hybrids are also made by manufacturers that tend to produce reliable vehicles overall, such as Toyota, Hyundai, and Kia.” Hybrids also are not typically loaded with high-tech features like multiple customizable displays that can be problem-prone, which is why Fisher says they are great options for drivers who are more interested in getting ideal fuel mileage than they are in bells and whistles. “These vehicles are not necessarily a tour de force of technology, so there’s just less that can go wrong with them,” he says.

Plug-in hybrid electric vehicles (PHEVs), which have both a battery for short-range electric driving and an internal combustion engine for long-range driving, are the least reliable category — 146 percent more problems than conventional cars. “PHEVs are sort of like an EV and a conventional car rolled into one, so by their nature they have more things that can go wrong with them,” Fisher says.
There are exceptions, notes the auto testing director. Toyota’s RAV4 Prime plug-in hybrid “is one of the most reliable models in our survey this year. Similarly, the Ford F-150 hybrid has transmission and other issues that buck the trend of strong hybrid reliability.”

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Source: Slashdot – EV Owners Report ‘Far More’ Problems Than Conventional Car Owners, Says Consumer Reports

“Scientists have created tiny living robots from human cells,” reports CNN. The mini-bots “can move around in a lab dish and may one day be able to help heal wounds or damaged tissue, according to a new study. ”

The study’s lead author tells CNN, “We don’t realize all the competencies that our own body cells have.”

A team at Tufts University and Harvard University’s Wyss Institute have dubbed these creations anthrobots. The research builds on earlier work from some of the same scientists, who made the first living robots, or xenobots, from stem cells sourced from embryos of the African clawed frog (Xenopus laevis)…

The scientists used adult human cells from the trachea, or windpipe, from anonymous donors of different ages and sexes… The tracheal cells are covered with hairlike projections called cilia that wave back and forth. They usually help the tracheal cells push out tiny particles that find their way into air passages of the lungs. Earlier studies had also shown that the cells can form organoids — clumps of cells widely used for research. Study coauthor Gizem Gumuskaya experimented with the chemical composition of the tracheal cells’ growth conditions and found a way to encourage the cilia to face outward on the organoids. Once she had found the right matrix, the organoids became mobile after a few days, with the cilia acting a bit like oars…

“In our method, each anthrobot grows from a single cell.” It’s this self-assembly that makes them unique. Biological robots have been made by other scientists, but they were constructed by hand by making a mold and seeding cells to live on top of it, said study author Michael Levin… They survived up to 60 days in laboratory conditions.

The experiments outlined in this latest study are at an early stage, but the goal is to find out whether the anthrobots could have medical applications, Levin and Gumuskaya said. To see whether such applications might be possible, researchers examined whether the anthrobots were able to move over human neurons grown in a lab dish that had been “scratched” to mimic damage. They were surprised to see the anthrobots encouraged growth to the damaged region of the neurons, although the researchers don’t yet understand the healing mechanism, the study noted.

Read more of this story at Slashdot.

Source: Slashdot – Tiny Living Robots Made From Human Cells Surprise Scientists

“Structured concurrency is a new way to use multithreading in Java,” reports InfoWorld.

“It allows developers to think about work in logical groups while taking advantage of both traditional and virtual threads.”

Available in preview in Java 21, structured concurrency is a key aspect of Java’s future, so now is a good time to start working with it… Java’s thread model makes it a strong contender among concurrent languages, but multithreading has always been inherently tricky. Structured concurrency allows you to use multiple threads with structured programming syntax. In essence, it provides a way to write concurrent software using familiar program flows and constructs. This lets developers focus on the business at hand, instead of the orchestration of threading.

As the JEP for structured concurrency says, “If a task splits into concurrent subtasks then they all return to the same place, namely the task’s code block.” Virtual threads, now an official feature of Java, create the possibility of cheaply spawning threads to gain concurrent performance. Structured concurrency provides the simple syntax to do so. As a result, Java now has a unique and highly-optimized threading system that is also easy to understand…

Between virtual threads and structured concurrency, Java developers have a compelling new mechanism for breaking up almost any code into concurrent tasks without much overhead… Any time you encounter a bottleneck where many tasks are occurring, you can easily hand them all off to the virtual thread engine, which will find the best way to orchestrate them. The new thread model with structured concurrency also makes it easy to customize and fine-tune this behavior. It will be very interesting to see how developers use these new concurrency capabilities in our applications, frameworks, and servers going forward.
It involves a new class StructuredTaskScope located in the java.util.concurrent library. (InfoWorld points out that “you’ll need to use –enable-preview and –source 21 or –source 22 to enable structured concurrency.”)

Their reporter shared an example on GitHub, and there’s more examples in the Java 21 documentation. “The structured concurrency documentation includes an example of collecting subtask results as they succeed or fail and then returning the results.”

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Source: Slashdot – Java Tries a New Way to Use Multithreading: Structured Concurrency

It can regenerate bits of its body. Ancient Mexicans revered it as a mischievous, shape-shifting god.

They named it axolotl — translation: “water monster” — and it’s a “salamander with a Mona Lisa smile,” reports the Washington Post, “an alien-looking creature with a permanent grin and a crown of feathery gills”.

But while there’s over a million in the world’s scientific laboratories, back in its only natural habitat — the canals of Lake Xochimilco in Mexico City — it’s on the brink of extinction.

In hopes of preventing the annihilation of a species with mystifying traits, ecologists at Mexico’s National Autonomous University are giving the public the chance to virtually adopt an axolotl. For $30, $180 or $360, donors can choose the sex, age and name of the little buddy they get to call theirs for a month, six months or a year, respectively. The axolotls stay in Mexico, but donors receive an adoption kit with an infographic, the axolotl’s identification card, a certificate of adoption and a personalized thank-you letter.

The campaign also includes options to buy an axolotl a meal for $10 or to fix up one of their homes for $50. And for those wanting to splurge a bit more, participants can adopt the axolotl’s refuge of chinampas — the artificial islands that dot Lake Xochimilco — for one, six or 12 months starting at $450. The funds will go toward building refuges for the axolotl and restoring its habitat, which has been devastated by the effects of Mexico City’s urbanization over the last decades, said Luis Zambrano, an ecologist at Mexico’s National Autonomous University.

“A species can’t be a species without its habitat,” Zambrano said.

Axolotls have “helped scientists understand how organs develop in vertebrates, uncover the causes of the birth defect spina bifida and discover thyroid hormones…”

“The salamanders have also become beloved exotic pets — to the point that ‘there’s claw machines in Japan that let you pick up an axolotl to take home,’ Zambrano added.”

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Source: Slashdot – Why Mexico Wants You to Virtually Adopt an Axolotl Salamander