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NASA's Juno spacecraft made its closest flyby yet of Io, one of Jupiter's largest moons, sending back images of "sharp cliffs, edgy mountain peaks, lakes of pooled lava and even a volcanic plume," reports the New York Times. From the report: The Juno spacecraft, designed to study the origin and evolution of Jupiter, arrived at the planet in 2016. NASA extended the mission in 2021, and the orbiter has since captured photos of the Jovian moons Ganymede, Europa and most recently Io. [...] Juno conducted a number of more distant observations of Io in recent years. Its latest flyby occurred on Dec. 30, when the spacecraft came within 932 miles of the moon. The images captured during this visit were made with an instrument called JunoCam and are in visible wavelengths. They are some of the highest resolution views of Io's global structure. The mission's managers shared six images of Io on the mission's website, and members of the public have since uploaded digitally enhanced versions that highlight features on Io's surface. Mission scientists are already at work analyzing these images, searching for differences across Io's surface to learn how often its volcanoes erupt, how bright and hot those eruptions are and how the resulting lava flows. According to Dr. Bolton, the team will also compare Juno's images to older views of the Jovian moon to determine what has changed on Io over a variety of encounters. And they'll get a second set of data to work with in a month, when Juno completes another close flyby of the explosive world on Feb. 3.

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Programmer James Lambert has been working on a demake of Valve's Portal puzzle game for the Nintendo N64. After several years of development, Portal 64: The First Slice is now out of beta with two-thirds of the game's test chambers available to play. PC Gamer reports: In the announcement video Lambert goes through some of the new features in the latest build, including a seriously impressive visual rework on the portal gun itself. The video also showcases just how much of Portal's feel this manages to successfully capture, in particular the mind-bending effects of observing rooms and Chell through the portals themselves. I once called this the most impressive homebrew game I've ever seen and, while admittedly the N64 nostalgia helps, I'd stick by that. While this is obviously the first slice (geddit) and there's more to come, it's an incredible achievement in its own right: The first 13 test chambers of the game all present-and-correct. Portal has 19 test chambers, and Portal: Still Alive (which unbelievably has never seen an official PC release) added a further 14, so Lambert's well on his way to completing a vanilla version of Portal 64. You can follow the Portal 64 project on YouTube and download the game here.

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An anonymous reader quotes a report from Interesting Engineering: Marking a significant advancement in medical science, the world's first partial heart transplant has achieved the expected outcome after over a year of research efforts. Carried out by Duke Health, the patient, a young individual, now exhibits functioning valves and arteries that are growing in tandem with the transplant, as initially expected by the medical team. In spring 2022, doctors carried out the procedure on a baby who needed a new heart valve. Before, they used non-living valves, which didn't grow with the child. This meant the child needed frequent replacements, and the surgeries had a 50 percent chance of being deadly. The new procedure avoids these problems, according to the team. Babies with serious heart valve problems face a tough challenge because there aren't any implants that can grow with them. So, these babies end up needing new implants over and over until they're big enough for an adult-sized valve. It's a problem that doesn't have a solution yet. Duke Health doctors, leading a study published in the Journal of the American Medical Association, discovered that the innovative valve collection method used in the partial heart transplant resulted in two properly functioning valves and arteries that are growing along with the child, resembling natural blood vessels. "This publication is proof that this technology works, this idea works, and can be used to help other children," said Joseph W. Turek, first author of the study and Duke's chief of pediatric cardiac surgery, in a statement. The research also notes that the new procedure requires less immunosuppressant medication, reducing potential long-term side effects. It also facilitates a "domino transplant" method, where one donor heart benefits multiple patients, potentially doubling the number of hearts available for children with heart disease by utilizing previously unused hearts and valves.

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Generative AI models like Google Bard and GitHub Copilot are increasingly being used in various industries, but users often overlook their limitations, leading to serious errors and inefficiencies. Daniel Stenberg of curl and libcurl highlights a specific problem of AI-generated security reports: when reports are made to look better and to appear to have a point, it takes a longer time to research and eventually discard it. "Every security report has to have a human spend time to look at it and assess what it means," adds Stenberg. "The better the crap, the longer time and the more energy we have to spend on the report until we close it." The Register reports: The curl project offers a bug bounty to security researchers who find and report legitimate vulnerabilities. According to Stenberg, the program has paid out over $70,000 in rewards to date. Of 415 vulnerability reports received, 64 have been confirmed as security flaws and 77 have been deemed informative -- bugs without obvious security implications. So about 66 percent of the reports have been invalid. The issue for Stenberg is that these reports still need to be investigated and that takes developer time. And while those submitting bug reports have begun using AI tools to accelerate the process of finding supposed bugs and writing up reports, those reviewing bug reports still rely on human review. The result of this asymmetry is more plausible-sounding reports, because chatbot models can produce detailed, readable text without regard to accuracy. As Stenberg puts it, AI produces better crap. "A crap report does not help the project at all. It instead takes away developer time and energy from something productive. Partly because security work is considered one of the most important areas so it tends to trump almost everything else." As examples, he cites two reports submitted to HackerOne, a vulnerability reporting community. One claimed to describe Curl CVE-2023-38545 prior to actual disclosure. But Stenberg had to post to the forum to make clear that the bug report was bogus. He said that the report, produced with the help of Google Bard, "reeks of typical AI style hallucinations: it mixes and matches facts and details from old security issues, creating and making up something new that has no connection with reality." [...] Stenberg readily acknowledges that AI assistance can be genuinely helpful. But he argues that having a human in the loop makes the use and outcome of AI tools much better. Even so, he expects the ease and utility of these tools, coupled with the financial incentive of bug bounties, will lead to more shoddy LLM-generated security reports, to the detriment of those on the receiving end.

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Qualcomm today unveiled a new Snapdragon XR2+ Gen 2 chipset, a single-chip architecture that will likely power Apple Vision Pro competitors from Meta, Samsung, Google and HTC, among others. ZDNet reports: Succeeding last year's XR2 Gen 2, the plus variant brings improved GPU and CPU frequency -- up 15% and 20% respectively, support for 4.3K per eye resolution at 90fps, and the ability for headsets to field 12 or more cameras with on-device AI capabilities. The latter allows equipped models to better track user movements and surrounding objects for more immersive (and harmonious) VR and MR experiences. As for efficiency gains, you'll still be getting the 50% improvement as the previous XR2 Gen 2 when stacked against the XR2 Gen 1 platform. Basically, there's no change on that front. "(Snapdragon XR2+ Gen 2) will take XR productivity and entertainment to the next level by bringing spectacularly clear visuals to use cases such as room-scale screens, life-size overlays and virtual desktops," said Hugo Swart, vice president and general manager of XR, Qualcomm Technologies, Inc, in a Thursday press release. Clearly, the new silicon is aimed at headsets that can do it all -- with feature parity to the $3,500 gorilla in the room, Apple's upcoming Vision Pro headset -- though Qualcomm says it'll be priced accessibly for manufacturers to build hardware around. How affordable will these competing wearables be? Your guess is as good as mine. But considering we've already gotten products like the $500 Meta Quest 3 fielding the slightly less capable XR2 Gen 2 chip, the future of XR may not be as expensive as it seems. The new Snapdragon XR2+ Gen 2 chipset is made in collaboration with Google and Samsung, both of which bring expertise in the Android ecosystem and developing mobile VR devices. The trio had announced plans to develop an XR platform back in February of 2023, likely in reaction to the then-rumored headset by Apple.

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