computers

28 Apr 2026

Slashdot

Electrical Current Might Be the Key To a Better Cup of Coffee

An anonymous reader quotes a report from Ars Technica: University of Oregon chemist Christopher Hendon loves his coffee -- so much so that studying all the factors that go into creating the perfect cuppa constitutes a significant area of research for him. His latest project: discovering a novel means of measuring the flavor profile of coffee simply by sending an electrical current through a sample beverage. The results appear in a new paper published in the journal Nature Communications. [...] The coffee industry typically uses a method for measuring the refractive index of coffee -- i.e., how light bends as it travels through the liquid -- to determine strength, but it doesn't capture the contribution of roast color to the overall flavor profile. So for this latest study, Hendon decided to focus on roast color and beverage strength, the two variables most likely to affect the sensory profile of the final cuppa. His solution turned out to be quite simple. Hendon repurposed an electrochemical tool called a potentiostat, typically used to test battery and fuel cell performance. Hendon used the tool to measure how electricity interacted with the liquid. He found that this provided a better measurement of the flavor profile. He even tested it on four different samples of coffee beans and successfully identified the distinctive signature of a batch that had failed the roaster's quality-control process. Granted, one's taste in coffee is fairly subjective, so Hendon's goal was not to achieve a "perfect" cup but to give baristas a simple tool to consistently reproduce flavor profiles more tailored to a given customer's taste. "It's an objective way to make a statement about what people like in a cup of coffee," said Hendon. "The reason you have an enjoyable cup of coffee is almost certainly that you have selected a coffee of a particular roast color and extracted it to a desired strength. Until now, we haven't been able to separate those variables. Now we can diagnose what gives rise to that delicious cup." Outside of his latest electrical-current experiment, Christopher Hendon's coffee research has shown that espresso can be made more consistently by modeling extraction yield -- how much coffee dissolves into the final drink -- and controlling water flow and pressure. He also found that static electricity from grinding causes fine coffee particles to clump, which disrupts brewing. The solution: adding a small squirt of water to beans before grinding (known as the Ross droplet technique) to reduce that static, cut clumping and waste, and lead to a stronger, more consistent espresso.

Apple Vision Pro Used In World-First Cataract Surgery

Apple's Vision Pro has been used in what's described as the world's first cataract surgery performed with the headset. MacRumors reports: [New York opthalmologist] Dr. Eric Rosenberg of SightMD completed the initial procedure in October 2025 and has since performed hundreds of additional cases using ScopeXR, a surgical platform he co-developed for Apple's mixed reality device. ScopeXR streams live feeds from 3D digital surgical microscopes directly into the Vision Pro, which lets the surgeon view the operative field in stereoscopic 3D while overlaying preoperative diagnostic data. The platform also supports real-time remote collaboration, allowing surgeons to virtually join procedures and see exactly what the operating surgeon sees. "We are now able to bring the world's best surgeon into any operating room, at any hour, from anywhere on the planet," said Dr. Rosenberg in a company press release. "From residents performing their first cases to surgeons facing unexpected complications, this technology democratizes access to expertise and that will save vision."

Sony Rolls Out 30-Day Online DRM Check-In For PlayStation Digital Games

Sony is reportedly rolling out a 30-day online check-in requirement for some digital PS4 and PS5 games, meaning players could temporarily lose access if their console does not reconnect to renew the license. Tom's Hardware reports: In the info page of an affected game, you'd see a new validity period and a "remaining time" deadline. At first, this seemed like a software bug, but now PlayStation Support has confirmed its authenticity to multiple users. PlayStation owners are furious about the change. From what we've seen, this DRM is intended for digital game copies. It works by instating a mandatory online check-in where you have to connect to the internet within a rolling 30-day window or risk losing access to the game. Afterward, you can still restore access, but you'll need an internet connection to renew the game's license first. So far, it seems like only games installed after the recent March firmware update are affected. Affected customers report that setting your PS4 or PS5 as the primary console doesn't alleviate this check-in policy either. No matter what, any game you download from now on will feature this new requirement, effectively eliminating the concept of offline play for even single-player titles.

OSnews

Apple wants to kill your Time Capsule, but they run NetBSD so they can’t

It seems like Apple is finally going to remove support for AFP from macOS, twelve years after first moving from AFP to SMB for its default network file-sharing technology. This change shouldn't impact most people, as it's highly unlikely you're using AFP for anything in 2026. Still, there is one small group of people to whom this change has an actual impact: owners of Apple's Time Capsule devices. Time Capsules only support AFP and SMB1, and with SMB1 being removed from macOS ages ago, and now AFP being on the chopping block as well, macOS 27 would render your Time Capsule more or less unusable. It's important to note that the last Time Capsule sold by Apple, the fifth generation, was released in 2013, and the product line as a whole was discontinued in 2018. If you bought a Time Capsule in the twilight years of the line's availability, I think you have a genuine reason to be perturbed by Apple cutting you off from your product if you upgrade to macOS 27, but at least you have the option of keeping an older version of macOS around so you can keep interacting with your time Capsule. It still feels like a bit of a shitty move though, as those fifth generation models came with up to 3TB of storage, which can still serve as a solid NAS solution. Thank your lucky stars, then, that open source can, as usual, come to the rescue when proprietary software vendors do what they always do and screw over their customers. Did you know every generation of Time Capsule actually runs NetBSD, and that it's trivially easy to add support for Samba 4 and SMB3 authentication to your Time Capsule, thereby extending its life expectancy considerably? TimeCapsuleSMB does exactly that. If the setup completes successfully, your Time Capsule will run its own Samba 4 server, advertise itself over Bonjour (show up automatically in the "Network" folder on macOS), and accept authenticated SMB3 connections from macOS. You should then be able to open Finder, choose Connect to Server, and use a normal SMB URL instead of relying on Apple's legacy stack. You should also be able to use the disk for Time Machine backups. ↫ TimeCapsuleSMB It's compatible with both NetBSD 4 and NetBSD 6-based Time Capsules, although you'll need to run a single SMB activation command every time a NetBSD 4-based Time Capsule reboots. This will also disable any AFP and SMB1 support, but that is kind of moot since those are exactly the technologies that don't and won't work anymore once macOS 27 is released. The installation is also entirely reversible if, for whatever reason, you want to undo the addition of Samba 4. This whole saga is such an excellent example of why open source software protects users' rights, by design.

28 Apr 2026 8:54pm GMT

Ars Technica

Flesh-eating bacteria devour man's arm and leg in just three days

When doctors saw him, his limbs were discolored and crackling.

28 Apr 2026 8:15pm GMT

FCC orders review of ABC licenses after Kimmel joke offends Trump and first lady

Kimmel joke calling Melania an "expectant widow" followed quickly by FCC order.

28 Apr 2026 7:57pm GMT

Drone pilot makes US rescind no-fly zones around unmarked, moving ICE vehicles

Civil liberty concerns spur FAA to revise drone no-fly zones near ICE vehicles.

28 Apr 2026 7:37pm GMT

27 Apr 2026

OSnews

Dillo 3.3.0 released

Dillo is an amazing web browser for those of us who want their web browsing experience to be calmer and less flashing. Dillo also happens to be a very UNIX-y browser, and their latest release, 3.3.0, underlines that. A new dilloc program is now available to control Dillo from the command line or from a script. It searches for Dillo by the PID in the DILLO_PID environment variable or for a unique Dillo process if not set. ↫ Dillo 3.3.0 release notes You can use this program to control your Dillo instance, with basic commands like reloading the current URL, opening a new URL, and so on, but also things like dumping the current page's contents. I have a feeling more commands and features will be added in future releases, but for now, even the current set of commands can be helpful for scripting purposes. I'm sure some of you who live and die in the terminal are already thinking of all the possibilities here. You can now also add page actions to the right-click context menu, so you can do things like reload a page with a Chrome curl impersonator to avoid certain JavaScript walls. This, too, is of course extensible. Dillo 3.3.0 also brings experimental support for building the browser with FLTK 1.4, and implemented a fix specifically to make OAuth work properly.

27 Apr 2026 9:47pm GMT

Ubuntu is going to integrate “AI”, but Canonical remains vague about the how and why

Ubuntu, being one of the more commercial Linux distributions, was always going to jump on the "AI" bandwagon, and Jon Seager, Canonical's VP Engineering, published a blog post with more details. Throughout 2026 we'll be working on enabling access to frontier AI for Ubuntu users in a way that is deliberate, secure, and aligned with our open source values. By focusing on the combination of education for our engineers, our existing knowledge of building resilient systems and our strengthening silicon partnerships, we will deliver efficient local inference, powerful accessibility features, and a context-aware OS that makes Ubuntu meaningfully more capable for the people who rely on it Ubuntu is not becoming an AI product, but it can become stronger with thoughtful AI integration. ↫ Jon Seager at Ubuntu Discourse The problem with this entire post is that, much like all other corporate communications about "AI", it's all deceptively vague, open-ended, and weasely. Adjectives like "focused", "principled", "thoughtful", and "tasteful" don't really mean anything, and leave everything open for basically every type of slop "AI" feature under the sun. Their claims about open weights and open source models are also weakened by words like "favour" and "where possible", again leaving the door wide open for basically any shady "AI" company's models and features to find their way into your default Ubuntu installation. There's also very little in terms of concrete plans and proposed features, leaving Ubuntu users in the dark about what, exactly, is going to be added to their operating system of choice during the remainder of the year. There's mentions of improved text-to-speech/speech-to-text and text regurgitators, but that's about it. None of it feels particularly inspired or ground-breaking, and the veneer of open source, ethical model creation, and so on, is particularly thin this time around, even for Canonical. I don't really feel like I know a lot more about Canonical's "AI" intentions for Ubuntu after reading this post than I did before, other than Ubuntu users might be able to generate text in their email client or whatever later this year. Is that really something anybody wants?

27 Apr 2026 9:32pm GMT