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Nov 13, 2024
Accelerated muons bring next-gen particle colliders closer to reality
Posted by Genevieve Klien in categories: materials, particle physics
Now, scientists have not only cooled muons but also accelerated them in an experiment at the Japan Proton Accelerator Research Complex, or J-PARC, in Tokai. The muons reached a speed of about 4 percent the speed of light, or roughly 12,000 kilometers per second, researchers report October 15 at arXiv.org.
The scientists first sent the muons into an aerogel, a lightweight material that slowed the muons and created muonium, an atomlike combination of a positively charged muon and a negatively charged electron. Next, a laser stripped away the electrons, leaving behind cooled muons that electromagnetic fields then accelerated.
Muon colliders could generate higher energy collisions than machines that smash protons, which are themselves made up of smaller particles called quarks. Each proton’s energy is divvied up among its quarks, meaning only part of the energy goes into the collision. Muons have no smaller bits inside. And they’re preferable to electrons, which lose energy as they circle an accelerator. Muons aren’t as affected by that issue thanks to their larger mass.
Nov 13, 2024
Graph-based AI model finds hidden links between science and art to suggest novel materials
Posted by Genevieve Klien in categories: robotics/AI, science
Amazon is poised to roll out its newest artificial intelligence chips as the Big Tech group seeks returns on its multibillion-dollar semiconductor investments and to reduce its reliance on market leader Nvidia.
Executives at Amazon’s cloud computing division are spending big on custom chips in the hopes of boosting the efficiency inside its dozens of data centers, ultimately bringing down its own costs as well as those of Amazon Web Services’ customers.
The effort is spearheaded by Annapurna Labs, an Austin-based chip start-up that Amazon acquired in early 2015 for $350 million. Annapurna’s latest work is expected to be showcased next month when Amazon announces widespread availability of ‘Trainium 2,’ part of a line of AI chips aimed at training the largest models.
Nov 13, 2024
Computational method pinpoints how cause-and-effect relationships ebb and flow over time
Posted by Saúl Morales Rodriguéz in categories: computing, neuroscience
A new computational method can identify how cause-and-effect relationships ebb and flow over time in dynamic real-life systems such as the brain.
Nov 13, 2024
New design for photonic time crystals could change how we use and control light
Posted by Saúl Morales Rodriguéz in categories: innovation, materials
An international research team has for the first time designed realistic photonic time crystals–exotic materials that exponentially amplify light. The breakthrough opens up exciting possibilities across fields such as communication, imaging and sensing by laying the foundations for faster and more compact lasers, sensors and other optical devices.
Nov 13, 2024
Raise the roof: How to reduce badminton birdie drift
Posted by Saúl Morales Rodriguéz in category: futurism
“For an existing barrel roof stadium, renovating the opening will be a good solution. Reworking the roof will be much costlier,” Jayanarasimhan explained.
Jayanarasimhan hopes these findings will help the sports community realize that there are better solutions for mitigating wind drift beyond just turning off the ventilation.
“We expect that with this pace of research down the road, wind drift complaints will be negligible from badminton tournaments,” said Jayanarasimhan. “We are preparing to study other roof configurations [and] the deviation of the shuttlecock trajectory in different wind directions and conduct a case study of the existing indoor badminton stadiums.”
Nov 13, 2024
Testing AI systems on hard math problems shows they still perform very poorly
Posted by Saúl Morales Rodriguéz in categories: mathematics, robotics/AI
A team of AI researchers and mathematicians affiliated with several institutions in the U.S. and the U.K. has developed a math benchmark that allows scientists to test the ability of AI systems to solve exceptionally difficult math problems. Their paper is posted on the arXiv preprint server.
Nov 13, 2024
NASA Recorded Something Escaped A Black Hole At Almost The Speed Of Light (Video)
Posted by Saúl Morales Rodriguéz in categories: cosmology, materials
A black hole in the MAXI J1820+070 system ejected about 400 million billion pounds of gas in twin jets—equivalent to 500 million times the mass of the Empire State Building.
In a significant astronomical discovery, NASA’s Chandra X-ray Observatory captured a rare phenomenon: a black hole ejecting massive jets of material at nearly the speed of light. This black hole is part of the binary system MAXI J1820+070, positioned approximately 10,000 light-years away, which is relatively close in cosmic terms. This proximity allowed detailed observations that contribute to our understanding of how black holes interact with companion stars.
The MAXI J1820+070 system features a black hole about eight times the mass of the sun, drawing material from a companion star roughly half the sun’s mass. This process creates an accretion disk—a luminous sphere emitting bright X-rays as material is funneled toward the black hole. While some gas is absorbed, some is expelled in powerful jets that travel in opposite directions.
Nov 13, 2024
James Webb Space Telescope Has Captured A Perfect Einstein Ring 12 Billion Light-Years Away
Posted by Saúl Morales Rodriguéz in category: space
Since the initial James Webb Space Telescope photographs were released in July, our feeds have been inundated with breathtaking images of space, ranging from amazingly detailed images of Jupiter to the furthest distant known star.
This is an updated (quotes and sources) version of the previous article.
Webb has done it again, this time capturing an almost perfect Einstein ring from a distance of 12 billion light-years. And we can’t take our eyes off them.
Nov 13, 2024
A Supermassive Black Hole Shot A Light-Speed Jet Pointing Straight Toward Earth
Posted by Saúl Morales Rodriguéz in category: cosmology
Astronomers have found a supermassive black hole ejecting a jet of energy at nearly the speed of light. This event, called AT2022cmc, is the most distant tidal disruption event (TDE) ever recorded, taking place 12.4 billion light years away from Earth. The international team of researchers shared their findings in papers published on November 30 in Nature and Nature Astronomy, noting that this TDE was observable due to the intense brightness of its jet and the direction it pointed—right toward Earth.
Igon Andreoni, an astronomer at the University of Maryland and co-leader of the study, emphasized how unusual it is to witness such a jet, as it must be aimed almost directly at Earth for detection. The light from AT2022cmc reached Earth after traveling across space for approximately 8.5 billion years, implying that this event happened when the universe was just a third of its current age.
The observation has led researchers to propose that the black hole involved was spinning at a high rate, which likely contributed to the formation of the jet. Despite its classification as “supermassive,” this black hole’s mass, estimated at a few hundred million times that of the Sun, is typical for black holes at the centers of galaxies.