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"ScienceAlert is reporting that researchers may have finally determined why, for many years, power grids around the world have been pulsing every 60 seconds," writes longtime Slashdot reader fahrbot-bot. The likely culprit? Uninterruptible power supplies running routine battery checks. From the report: Every minute, some uninterruptible power supplies perform routine battery checks, creating small but measurable surges in electricity demand. And it's like clockwork. "Even benign control routines can become systemically relevant when many devices act coherently," writes a team led by physicist Dirk Witthaut of the University of Cologne, Germany, in a paper published in Nature Energy. "Unintended synchronization can generate recurrent and potentially amplified oscillatory behavior in large-scale cyber-physical energy systems." To figure it out, Witthaut and his colleagues analyzed high-resolution electricity measurements from buildings at the Forschungszentrum Julich research campus in Germany. [... they found that] the 60-second pattern appeared in four buildings, all of which contained uninterruptible power supplies. None of the buildings they measured without these systems showed the same pattern. Following the electrical signals more closely, the researchers detected tiny bursts of current from the batteries at precisely one-minute intervals. They were able to trace the resulting fluctuations through one building's electrical system, all the way to the connection with the public high-voltage grid. The manufacturer subsequently confirmed the culprit's identity -- routine battery self-tests, conducted automatically by the systems' management software. But why would equipment in different buildings, let alone different countries, be doing this at the same time? The answer appears to lie in the clocks. Digital devices can synchronize their internal clocks using external time signals, meaning that independently operating systems can end up performing their scheduled tasks together. Individually, these small checks are insignificant. But when enough devices act in synchrony, their combined electricity demand can produce a measurable effect across an entire power grid.

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12 Nov 2026 7:00am GMT

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12 Nov 2026 5:49am GMT

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12 Nov 2026 4:32am GMT

An anonymous reader quotes a report from PBS: The historic ocean liner SS United States will be intentionally sunk Wednesday off the coast of the Florida panhandle. Live coverage of the sinking of the SS United States is expected to start at 1 p.m. EST, with the sinking expected at 2 p.m. EST. Watch live in the video player above. In its heyday, the SS United States crushed the trans-Atlantic speed record, which it still holds. The luxury ocean liner took only three days to cross from New York to Europe on its maiden voyage in 1952. Carrying presidents and Hollywood stars, the nearly 1,000-foot vessel was a technical marvel of its time. However, the rise of air travel and high operating costs sunk its economic viability, and the ship was pulled from service in 1969. The ocean liner sat at Philadelphia's Pier 82 for nearly 30 years. After a contentious back and forth with a pier landlord over rent and docking fees, Okaloosa County in Florida eventually stepped in to purchase the ship and bring it to the Gulf of Mexico to become the world's largest artificial reef. The multi-million dollar project is also aimed at creating an economic development opportunity as a major diving attraction. "It was our goal to make sure that she wasn't lost forever," said David Lawrence, a member of the board for the SS United States Conservancy, the group that sold the vessel to the Florida county. Like the ship's unconventional life, it will also have an unconventional sinking. Federal environmental and explosives rules prevent the county from using explosives. Instead, tanks inside the ship have been removed and large holes were cut into the decks. Once the valves are opened, water will flood the hull, sinking the ship. Resting at 180 feet below the surface of the water, the SS United States will join more than 500 artificial reefs in Okaloosa County, which the county relies on to support the underwater ecosystem.

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12 Nov 2026 3:30am GMT

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12 Nov 2026 3:18am GMT

United Airlines is banning unauthorized third-party AI agents from booking flights, checking in passengers or making account changes on travelers' behalf. CBS News reports: To make an airline booking, an AI agent requires access to a customer's personal information, including credentials like payment information. United has a problem with that, saying that "sharing account credentials with personal, third-party, AI assistants can expose sensitive information, and actions taken by these tools may result in unintended purchases, account changes, or use of MileagePlus miles." The carrier also said that using an AI agent to, for example, check in for a flight could violate federal regulations, including rules requiring travelers to verify in person that their luggage does not contain banned substances. "As a result, United is taking steps to restrict access -- directly within our digital platforms and indirectly via travel agencies and aggregators -- to prohibit use by unauthorized, third-party personal AI agents or assistants," said the airline, which is updating its booking and ticketing policies to reflect the new rule. "United is saying they don't want to add yet another, and potentially even more powerful, intermediary than they already face in terms of Google search, price-comparison metasearch sites and online travel agencies," said Henry Harteveldt, an aviation analyst at Atmosphere Research Group. "Flight searches cost airlines money, and undoubtedly United wants to avoid the expense associated with the surge of AI bot flight searches."

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12 Nov 2026 12:00am GMT

Microsoft releases .NET 11 with C# 15, runtime optimizations, faster SDK tooling, improved Native AOT performance, and new ASP.NET Core features.

11 Nov 2026 11:44pm GMT

Valve's latest Steam Client update brings a 64-bit Linux application, Steam Runtime containerization, HDR improvements, and crash fixes.

11 Nov 2026 10:15pm GMT

Red Hat Enterprise Linux 10.3 ships with Linux kernel 6.12, GCC 16, sealed OS images, MCP-based diagnostics, and updated developer tools.

11 Nov 2026 6:45pm GMT