computers

07 May 2026

Slashdot

Single Dose of Magic Mushroom Psychedelic Can Cause Anatomical Brain Changes

A small study found that a single 25mg dose of psilocybin produced measurable brain changes that were still visible a month later, along with reported improvements in psychological insight, wellbeing, and mental flexibility. The Guardian reports: Evidence for the changes came from specialized scans that measured the diffusion of water along nerve bundles in the brain. They suggested that some nerve tracts had become denser and more robust after the drug was taken. While the findings are preliminary, the scientists said the opposite was seen in ageing and dementia. "It's remarkable to see potential anatomical brain changes one month after a single dose of any drug," said Prof Robin Carhart-Harris, a neurologist at the University of California, San Francisco, and senior author on the study. "We don't yet know what these changes mean, but we do note that overall, people showed positive psychological changes in this study, including improved wellbeing and mental flexibility." [...] Writing in Nature Communications, the researchers describe another key finding. Those who had the largest spike in brain entropy after psilocybin were most likely to report deeper psychological insight and better wellbeing a month later, underlining the link between flexible thinking and improved mental health. "It suggests a psychobiological therapeutic action for psilocybin," said Carhart-Harris. Prof Alex Kwan, a neuroscientist at Cornell University in New York, said studies in mice had shown that psychedelics can rewire connections between nerves, a form of "plasticity" that could underlie their therapeutic effects. The big question is whether the same occurs in humans. "This study comes closer than most to addressing that question, by giving evidence of lasting changes in brain structure after psychedelic use," he said. But while the results were "exciting," the study involved a small number of people and DTI provides an indirect and limited view of brain connections, he said.

Sam Altman's Management Style Comes Under the Microscope At OpenAI Trial

Sam Altman's management style came under scrutiny on the seventh day of Elon Musk's high-stakes OpenAI trial, as former OpenAI figures Mira Murati, Shivon Zilis, and Helen Toner took the stand to testify about their experiences working with him. Their testimony resurfaced many of the criticisms that first emerged during Altman's brief ouster as CEO in 2023. An anonymous reader quotes a report from Business Insider: The first witness was Mira Murati, OpenAI's former chief technology officer and now founder of her own AI shop, Thinking Machines Lab. Jurors watched a recorded video deposition of Murati, who was also OpenAI's interim CEO after the board briefly ousted Sam Altman. Murati's testimony focused on her concerns about Altman's "difficult and chaotic" management style. She said Altman had trouble "making decisions on big controversial things." He also had a habit of telling people what they wanted to hear. "My concern was about Sam saying one thing to one person and a completely different thing to another person, and that makes it a very difficult and chaotic environment to work with," said Murati. Murati said that her issue with Altman was not about safety, "it is about Sam creating chaos." She said she supported Altman's return to OpenAI because the company "was at catastrophic risk of falling apart" at the time of his ousting. "I was concerned about the company completely blowing up." Zilis said she was upset that Altman rolled out ChatGPT without involving the board. "It wasn't just me but the entire board raised concern about that whole thing happening without any board communication," she said. Zilis said she was also concerned about a potential OpenAI deal with a nuclear energy startup called Helion Energy because both Altman and Greg Brockman were investors. Although the executives had disclosed the investment to the board, Zilis said the deal talk made her uneasy. It "felt super out of left field," she said. "How is it the case that we want to place a major bet on a speculative technology?" In a video deposition, Helen Toner, a former member of OpenAI's board who resigned in 2023, said she first became aware of ChatGPT's release when an OpenAI employee asked another board member whether the board was aware of the development. [...] Toner also elaborated on why the board, including herself, voted to remove Altman as CEO in 2023. "There were a number of things -- the pattern of behavior related to his honesty and candor, his resistance of board oversight, as well as the concerns that two os his inner management team raised to the board about his management practices, his manipulation of board processes," said Toner. Recap: Brockman Rebuts Musk's Take On Startup's History, Recounts Secret Work For Tesla (Day Six) OpenAI President Discloses His Stake In the Company Is Worth $30 Billion (Day Five) Musk Concludes Testimony At OpenAI Trial (Day Four) Elon Musk Says OpenAI Betrayed Him, Clashes With Company's Attorney (Day Three) Musk Testifies OpenAI Was Created As Nonprofit To Counter Google (Day Two) Elon Musk and OpenAI CEO Sam Altman Head To Court (Day One)

06 May 2026

Slashdot

Microsoft Edge Stores Passwords In Plaintext In RAM

Longtime Slashdot reader UnknowingFool writes: Security researcher Tom Joran Sonstebyseter Ronning has found that Microsoft Edge stores passwords in plaintext in RAM. After creating a password and storing it using Edge's password manager, Ronning found that he could dump the RAM and recover his password which was stored in plaintext. Part of the issue is Edge loads all passwords to all sites upon a single verification check, even if the user was not visiting a specific site. This is very different from Chrome, which only loads passwords for specific websites when challenged for the site's password. Also, Chrome will delete the password from memory once the password has been filled. Edge does not delete the passwords from memory once they are used. Microsoft downplayed the risk noting access would require control over a user's PC like a malware infection: "Access to browser data as described in the reported scenario would require the device to already be compromised," Microsoft said. Ronning countered that it was possible to dump passwords for multiple users using administrative privileges for one user to view the passwords for other logged-on users. "Design choices in this area involve balancing performance, usability, and security, and we continue to review it against evolving threats," Microsoft said. "Browsers access password data in memory to help users sign in quickly and securely -- this is an expected feature of the application. We recommend users install the latest security updates and antivirus software to help protect against security threats."

Ars Technica

SpaceX is starting to move on from the world's most successful rocket

Vandenberg Space Force Base in California is set to become SpaceX's busiest launch site-for now.

06 May 2026 10:28pm GMT

Anthropic raises Claude Code usage limits, credits new deal with SpaceX

Deal follows others with Microsoft, Amazon, and more.

06 May 2026 10:09pm GMT

TSMC taps wind power as AI chip demand soars, Taiwan feels energy crunch

TSMC backs renewables during record demand for energy-hungry chip manufacturing.

06 May 2026 9:47pm GMT

05 May 2026

OSnews

The text mode lie: why modern TUIs are a nightmare for accessibility

There is a persistent misconception among sighted developers: if an application runs in a terminal, it is inherently accessible. The logic assumes that because there are no graphics, no complex DOM, and no WebGL canvases, the content is just raw ASCII text that a screen reader can easily parse. The reality is different. Most modern Text User Interfaces (TUIs) are often more hostile to accessibility than poorly coded graphical interfaces. The very tools designed to improve the Developer Experience (DX) in the terminal-frameworks like Ink (JS/React), Bubble Tea (Go), or tcell-are actively destroying the experience for blind users. ↫ Casey Reeves The core reason should be obvious: the command-line interface, at its core, is just a stream of data with the newest data at the bottom, linearly going back in time as you go up. Any screen reader can deal with this fairly easily, and while I personally have no need for such a tool, I've heard from those that do that kernel-level screen readers are quite good at what they do. TUIs, or text-based user interfaces, made with modern frameworks are actually very different: they're "2D grid of pixels, where every character cell is a pixel. abandons the temporal flow for a spatial layout." It should become immediately obvious that screen readers won't really know what to do with this, and Reeves gives countless examples, but the short version is this: the cursor jumps all over the place with every screen update, which makes screen readers go nuts. Various older TUIs, made in a time well before these modern TUI frameworks came about, were designed in a much more terminal-friendly way, or give you options to hide the cursor to solve the problem that way. Irssi, for example, uses VT100 scrolling regions instead of redrawing the whole screen every time something changes. I had never really stopped to think about TUIs and screen readers, as is common among us sighted people. The problems Reeves describes seem to stem not so much from TUIs being inherently inaccessible, but from modern frameworks not actually making use of the terminal's core feature set. I really hope this Reeves' article shines a light on this problem, and that the people developing these modern TUIs start taking accessibility more seriously.

05 May 2026 10:03pm GMT

Using duplicity to back up your FreeBSD desktop

Backing up in modern times, we've had ZFS snapshots and replication to make this task extremely easy. However, you may not have access to another ZFS endpoint for replication, need to diversify risk by using a non-ZFS tool for backup, or are simply using UFS2, living the old skool life. For these situations, my first recommendation is to lean on Tarsnap for its ease of use and simplicity, making restoration just as easy as backing up. But some situations call for a different approach. Maybe you have a strict firewall at your company that doesn't allow Tarsnap data streams to egress from your corporate network, or you have internal/easy access to storage endpoints, such as S3-compatible object storage or a large-file storage location with SFTP access. When you are faced with the latter, the duplicity (sysutils/duplicity in ports) utility is available as an easily installable package onto your FreeBSD system. ↫ Jason Tubnor at the FreeBSD Foundation The rest of the article explains how to use duplicity on FreeBSD for the purpose described above.

05 May 2026 9:36pm GMT

04 May 2026

OSnews

Testing MacOS on the Apple Network Server 2.0 ROMs

Earlier this year, Mac OS and Windows NT-capable ROMs were discovered for Apple's unique AIX Network Server. Cameron Kaiser has since spent more time digging into just how capable these ROMs are, and has published another one of his detailed stories about his efforts. Well, thanks to Jeff Walther who generously built a few replica ROM SIMMs for me to test, we can now try the "2.0" MacOS ROMs on holmstock, our hard-working Apple Network Server 700 test rig (stockholm, my original ANS 500, is still officially a production unit). And there are some interesting things to report, especially when we pit the preproduction ROMs and this set head-to-head in MacBench, and even try booting Rhapsody on it. ↫ Cameron Kaiser A great read, as always.

04 May 2026 10:52pm GMT