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Apr 1, 2024

Supercomputer simulations decode the mass puzzle of the first stars

Posted by in category: supercomputing

Ching-Yao Tang and Ke-Jung Chen used the powerful supercomputer at Berkeley National Lab to create the world’s first high-resolution 3D hydrodynamics simulations of turbulent star-forming clouds for the first stars. Their results indicate that supersonic turbulence effectively fragments the star-forming clouds into several clumps, each with dense cores ranging from 22 to 175 solar masses, destined to form the first stars of masses of about 8 to 58 solar masses that agree well with the observation.

Furthermore, if the turbulence is weak or unresolved in the simulations, the researchers can reproduce similar results from previous simulations. This result first highlights the importance of turbulence in the first star formation and offers a promising pathway to decrease the theoretical mass scale of the . It successfully reconciles the mass discrepancy between simulations and observations, providing a strong theoretical foundation for the first star formation.

Apr 1, 2024

Open-source voice cloning model “Voice Craft” steamrolls over OpenAI’s ethical concerns

Posted by in categories: biotech/medical, robotics/AI

The open-source voice cloning model ‘Voice Craft’ makes OpenAI’s ethical restrictions on its voice model ‘Voice Engine’ seem irrelevant.

Apr 1, 2024

China: Hypersonic missile scientists build sensor to boost rail safety

Posted by in categories: electronics, military

A team of researchers from China, who are originally engaged in hypersonic missile development, have developed a mechanical sensor that can boost the safety on the country’s high-speed rail network.

As per an article in the South China Morning Post, the scientists have proposed using a high-sensitivity technology to paint a complete picture of every turn of the train’s wheels.

Apr 1, 2024

Scientists use X-rays to reveal speed of neutron star jets

Posted by in category: space

Astronomers measured neutron star jets, reaching one-third light speed. They utilized X-ray bursts to time the jet launch.

Apr 1, 2024

Hydrogen to power Japan’s new passenger jet by 2035

Posted by in categories: economics, energy, transportation

As AFP reports, in a meeting with industry experts, an economy ministry official outlined a target completion date of post-2035. To achieve this ambitious goal, a significant investment of five trillion yen ($33 billion) will be allocated over the next decade, fueling research and development of the new passenger plane.

This latest endeavor seeks to establish Japan as a leader in passenger aircraft production – a position it hasn’t held in over half a century. Building on the challenges that Mitsubishi Heavy Industries (MHI) encountered, which canceled its long-delayed passenger jet project in 2023, the new public-private consortium strongly emphasizes clean energy.

Apr 1, 2024

New device maximizes solar energy with self-cleaning tech

Posted by in categories: solar power, sustainability

Solar energy is vital for sustainable future, but dust and other environmental factors dramatically reduces its energy efficiency.

Apr 1, 2024

Princeton Lab pushes plasma limit with lithium in fusion breakthrough

Posted by in category: innovation

Lithium-lined tokamaks can help keep the plasma hot and stable while also providing more room for it to move inside the donut-shaped vessel.

Apr 1, 2024

Paper page — Unsolvable Problem Detection: Evaluating Trustworthiness of Vision Language Models

Posted by in category: futurism

Unsolvable problem detection evaluating trustworthiness of vision language models.

Evaluating trustworthiness of vision language models.

This paper introduces a novel and significant challenge for Vision Language Models (VLMs), termed Unsolvable Problem Detection (UPD).

Continue reading “Paper page — Unsolvable Problem Detection: Evaluating Trustworthiness of Vision Language Models” »

Apr 1, 2024

For the first time, U.S. dairy cows have tested positive for bird flu

Posted by in category: biotech/medical

Livestock in Texas, Kansas and Michigan are confirmed to have the virus, and herds in New Mexico and Idaho have also tested positive. The threat to the public is low, federal officials say.

Apr 1, 2024

Scientists Reveal Incredible Image of Magnetic Fields Spiraling from Supermassive Black Hole

Posted by in category: cosmology

This new view of the black holes Sagittarius A. and Messier 87 has shown their magnetic fields are strikingly similar.

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