Forgot your password?
Close
typodupeerror

Submission + - First Nuclear Clocks Start Ticking in Vienna and Beijing (phys.org)

Submitted by necro81
necro81 writes: Two groups, one in Vienna and one in Beijing, have successfully demonstrated the world's first nuclear clocks. Standard atomic clocks, like the caesium clocks that define the second, operate by observing the transition of electrons between different orbits about the nucleus. The resulting radiation is usually in the microwave range, and can produce clocks accurate to one second in 100 billion years.

Nuclear clocks go a step further, and probe energy transitions within the nucleus itself. Nuclei can arrange their protons and neutrons into different configurations, called isomers. The isomer with the lowest energy is the one usually found; higher-energy ones are only metastable and decay quickly. Usually it takes serious energy — x-rays and gamma rays — to excite a nucleus into a higher-energy arrangement. It so happens that thorium-229 can be excited using UV light with a wavelength of 148 nm — just within the capabilities of some exotic lasers.

It's still been quite a challenge. For one thing, Th-229 is not found in nature; it must be extracted from the decay chain of uranium-235. The Beijing team used just a microgram mixed in a crystal of calcium fluoride.

Although these prototype nuclear clocks are not yet more accurate than existing atomic clocks (one second in millions, rather than billions, of years), they show the way towards what may be possible. Because the energy transition is in the nucleus, rather than the electron cloud, it is less susceptible to outside disturbances like magnetic fields. And the fundamental frequency is much higher (five orders of magnitude), which should yield more precise timing. This development could lead to smaller and more reliable time standards across the world (and solar system).

Submission + - Wisconsin U–Madison Prof Francis Halzen named 2026 Nobel laureate in physi (wisc.edu)

Submitted by schwit1
schwit1 writes: Halzen is the principal investigator of the NSF IceCube Neutrino Observatory, the world’s largest — and perhaps strangest — telescope. The U.S. National Science Foundation-funded observatory is operated by an international collaboration of scientists led by the Wisconsin IceCube Particle Astrophysics Center based at UW–Madison.

Embedded in a cubic kilometer of Antarctic ice, IceCube uses thousands of light sensors to survey the universe for neutrinos, nearly massless particles that rarely interact with other matter. Neutrinos provide information about the workings of black holes, galaxies and other objects in the cosmos.

“IceCube is like no other telescope in the world,” says UW–Madison interim Chancellor Eric M. Wilcots. “And there is no other scientist quite like Francis Halzen, whose idea to create a neutrino detector under almost a mile of ice has led to a remarkable multinational and multi-institutional scientific collaboration and a fundamental shift in how we think about the universe.”

Submission + - New Ai-Powered "America.gov" Government Website Uses Gemini and Grok (cnn.com) 3

Submitted by fahrbot-bot
fahrbot-bot writes: CNN is reporting (and others) that President Donald Trump on Tuesday unveiled America.gov, a government website meant to serve as a one-stop shop for people trying to accomplish basic tasks like renewing a passport, enrolling in Medicare or applying for disaster relief.

The site, which launched with some basic functions ahead of a full rollout next year, is designed to serve as an AI-powered guide through the thicket of government agencies that Trump officials pledged would ultimately save people a whole lot of frustration.

The administration’s new initiative aims to allow Americans to access dozens of federal websites through a single point, making America.gov akin to a search tool that pulls information from across the government. And in the same way that people increasingly use AI models like ChatGPT or Google Gemini to compile information and provide customized answers, Trump officials claimed that America.gov would be able to do the same for people’s interactions with the federal government.

Enrolling in Medicare, for example, will become a matter of typing the request into the America.gov AI tool and following its step-by-step instructions. The same goes for applying to a government job — the new tool will now let people upload their resume directly to the site — or answering questions about federal benefits, publicly available documents or other necessities that fall under the federal government’s vast umbrella.

“Our vision is that one day, this type of convenience and simplicity will be across every government service,” said Joseph Gebbia, who leads the government’s National Design Studio.

But the reality is that the most advanced actions won’t be available until some point in 2027, raising questions about how long it will take for the administration to revamp the way the people interact with the government’s websites. The current version of America.gov can only do “answers.”

In related news, Variety notes that America.gov confirms, for now anyway, that Biden won the 2020 election.

Submission + - Microsoft Makes Linux Containers Native on Windows 11 (nerds.xyz)

Submitted by BrianFagioli
BrianFagioli writes: Microsoft has made WSL Containers generally available, giving Windows 11 developers a built in way to build, run, and deploy Linux containers through Windows Subsystem for Linux.

The release includes wslc.exe for managing containers, GPU support, networking improvements, health checks, storage mounts, and integration with Microsoft Defender for Endpoint and Intune. Microsoft also claims up to twice the performance when Linux environments access files stored on Windows.

Docker Desktop, Podman Desktop, and Rancher Desktop are not going anywhere, but developers who only need basic container functionality now have another option built around WSL. One notable feature is still missing: Compose support. Microsoft says adding it is now a priority.

Comment Re:There's no risk whatsoever (Score 1, Troll) 90

by Black Parrot (#66352642) Attached to: Just How Big is the AI Buildout - and How Risky?

How does the AI risk compare with the risk of allowing regimes like the IRGC to have nuclear weapons?

Well, some people think AI will extinctify us within four years, whereas if the IRGC gets nukes they'll figure out like everyone else that they can't actually use them except in self defense without getting erased, so the only difference will be that we won't be able to try crush them anymore.

You'd think common sense would make you want to go after the easy and obvious things first.

Yes, tell us how easy the current effort is turning out to be. Someone grabbed a tiger by the tail and can neither subdue it nor let go. The IRGC is probably laughing its ass off.

Slashdot Top Deals

panic: kernel segmentation violation. core dumped (only kidding)

Close