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Dark Matter Flies Ahead of Normal Matter in Mega Galaxy Cluster Collision

This artist's concept depicts a collision between two massive clusters of galaxies.
This artist’s concept shows what happened when two massive clusters of galaxies, collectively known as MACS J0018.5, collided: The dark matter in the galaxy clusters (blue) sailed ahead of the associated clouds of hot gas, or normal matter (orange). Both dark matter and normal matter feel the pull of gravity, but only the normal matter experiences additional effects like shocks and turbulence that slow it down during collisions.Credit: W.M. Keck Observatory/Adam Makarenko

The research provides a unique look at how this matter decoupling proceeds. Astronomers have untangled a messy collision between two massive clusters of galaxies in which the clusters’ vast clouds of dark matter have decoupled from the so-called normal matter...

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Handheld Device Offers Lab-Quality Diagnostic Testing

Handheld device offers lab-quality diagnostic testing

The LIAMT handheld processor features a window which the user can look through to view fluorescent virus detection signals. Credit: Advanced Science (2024). DOI: 10.1002/advs.202310066

Because of its high accuracy, laboratory-based polymerase chain reaction (PCR) testing is the gold standard for infectious disease diagnostics. However, PCR technology requires highly trained staff and costly equipment, hindering its availability, especially in low-resource settings. New research suggests a different kind of test could be more streamlined without sacrificing performance.

A platform technology developed by researchers at the University of Connecticut uses similar techniques as PCR testing, but within a handheld device rather than several benchtop machines.

In a study publish...

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AI Study reveals Dramatic Reasoning Breakdown in Large Language Models

AI study reveals dramatic reasoning breakdown in LLMs
Strong fluctuations across AIW problem variations. Also for higher performers, eg GPT-4o, GPT-4 and Claude Opus 3, correct response rates vary strongly from close to 1 to close to 0, despite only slight changes introduced in AIW variations (a color per each variation 1–4). This clearly shows lack of model robustness, hinting basic reasoning deficits. Credit: arXiv (2024). DOI: 10.48550/arxiv.2406.02061

Even the best AI large language models (LLMs) fail dramatically when it comes to simple logical questions. This is the conclusion of researchers from the Jülich Supercomputing Center (JSC), the School of Electrical and Electronic Engineering at the University of Bristol and the LAION AI laboratory.

In their paper posted to the arXiv preprint server, titled “Alice in Wonderland: S...

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Lunar Exploration Ground Sites will Enhance the Near Space Network’s Communications Services

NASA’s LEGS can do more than help Earthlings move about the planet. Three Lunar Exploration Ground Sites, or LEGS, will enhance the Near Space Network’s communications services and support of NASA’s Artemis campaign.

NASA’s Space Communications and Navigation (SCaN) program maintains the agency’s two primary communications networks—the Deep Space Network and the Near Space Network, which enable satellites in space to send data back to Earth for investigation and discovery.

Using antennas around the globe, these networks capture signals from satellites, collecting data and enabling navigation engineers to track the mission. For the first Artemis mission, these networks worked in tandem to support the mission as it completed its 25-day journey around the moon...

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