Tag: anomaly

NASA Safety Panel Calls For Reviews After Second Starliner Software Problem

A second software problem during a CST-100 Starliner test flight is prompting a NASA safety panel to recommend a review of Boeing’s software verification processes. Space News reports: That new software problem, not previously discussed by NASA or Boeing, was discussed during a Feb. 6 meeting of NASA’s Aerospace Safety Advisory Panel that examined the December uncrewed test flight of Starliner…

New classes of topological crystalline insulators having surface rotation anomaly

In a new report on Science Advances, Chen Fang and Liang Fu from the Beijing National Laboratory for Condensed Matter Physics in China, Kavli Institute for Theoretical Sciences and the Department of Physics, Massachusetts Institute of Technology in the U.S. Detailed the discovery of new types of quantum anomalies in two-dimensional systems with time-reversal symmetry (T) (conservation of entropy) and discrete…

The Next Frontier in AI: Nothing

How an overlooked feature of deep learning networks can turn into a major breakthrough for AI. From a report: Traditionally, deep learning algorithms such as deep neural networks (DNNs) are trained in a supervised fashion to recognize specific classes of things. In a typical task, a DNN might be trained to visually recognize a certain number of classes, say pictures of…

Did asteroid collision trigger Earth’s abrupt cooling 12,800 years ago?

Why did Earth’s climate rapidly cool 12,800 years ago? New evidence suggests that a comet or asteroid collision is to blame, with support coming from the bottom of a South Carolina lake. Source: https://earthsky.org/earth/asteroid-comet-younger-dryas-abrupt-cooling…

Log-periodic quantum oscillations and discrete scale invariance in Dirac materials

One fundamental problem of quantum electrodynamics is the fate of the superheavy atomic nucleus, which is proposed to collapse when the atomic number exceeds certain value. However, this intriguing supercritical collapse phenomenon remains elusive in experiments. Discrete scale invariance (DSI) is a scale anomaly with the violation of the continuous scale symmetry. The intriguing log-periodicity is the characteristic signature of DSI,…

‘No Doubt Left’ About Scientific Consensus on Global Warming, Say Experts

The scientific consensus that humans are causing global warming is likely to have passed 99% https://www.theguardian.com/science/2019/jul/24/scientific-consensus-on-humans-causing-global-warming-passes-99, according to the lead author of the most authoritative study on the subject, and could rise further after separate research that clears up some of the remaining doubts. From a report: Three studies published in Nature and Nature Geoscience use extensive historical data to show…

More amazing images of the July 2 eclipse

Some called it the “astronomer’s eclipse” because it passed near major observatories in Chile. Check out these beautiful images of the July 2, 2019 total solar eclipse. Source: https://earthsky.org/todays-image/images-july-2-2019-total-solar-eclipse…

Study unveils new supersymmetry anomalies in superconformal quantum field theories

Researchers at the University of Southampton and the Korea Institute for Advanced Study have recently showed that supersymmetry is anomalous in N=1 superconformal quantum field theories (SCFTs) with an anomalous R symmetry. The anomaly described in their paper, published in Physical Review Letters, was previously observed in holographic SCFTs at strong coupling, yet their work confirms that it is already present…

What is the mystery mass on the moon?

Scientists have discovered a massive subsurface deposit of dense material – probably metal – beneath the largest crater on the moon. Did it result from a huge asteroid impact or a former lunar ocean of molten rock? Source: https://earthsky.org/space/mystery-mass-moon-south-pole-aitken-basin…