Lifeboat Foundation

Via testing with a skin stand-in, a trio of physicists at Technical University of Denmark has ranked the types of paper that are the most likely to cause a paper cut. In an article published in Physical Review E, Sif Fink Arnbjerg-Nielsen, Matthew Biviano and Kaare Jensen tested the cutting ability and circumstances involved in paper cuts to compile their rankings.

Scientists may have found a new way to unlock the vast secrets of the Big Bang—the cosmic event thought to have kicked off the expansion of the universe billions of years ago. The revelation came in 2023, when scientists found nearly imperceptible ripples within the very fabric of space and time as we know it.

The ripples appear to be associated directly with rapidly spinning neutrons that we call pulsar timing arrays. Researchers believe that studying gravitational waves—more specifically, the low-frequency background hum they emit—may allow us to learn more about the Big Bang and the universe’s very beginning.

For a long time, researchers have believed that the low-frequency background hum of gravitational waves in our universe was part of a “phase transition” that occurred just after the Big Bang. However, a new bit of research could further unlock the secrets of the Big Bang and suggests that this might not be the case at all.

Dark matter remains one of the most enigmatic components of our universe. In this episode of Cosmology 101, we explore the evidence for dark matter and its critical role in shaping the cosmos. From galaxy rotations to cosmic web structures, discover how dark matter’s invisible hand influences the universe’s evolution and our understanding of fundamental physics.

Join Katie Mack, Perimeter Institute’s Hawking Chair in Cosmology and Science Communication, on an incredible journey through the cosmos in our new series, Cosmology 101.

Continue reading “Dark Matter Explained | Cosmology 101 Episode 7” »

Several pulsar timing array collaborations recently reported evidence of a stochastic gravitational wave background (SGWB) at nHz frequencies. While the SGWB could originate from the merger of supermassive black holes, it could be a signature of new physics near the 100 MeV scale. Supercooled first-order phase transitions (FOPTs) that end at the 100 MeV scale are intriguing explanations, because they could connect the nHz signal to new physics at the electroweak scale or beyond. Here, however, we provide a clear demonstration that it is not simple to create a nHz signal from a supercooled phase transition, due to two crucial issues that could rule out many proposed supercooled explanations and should be checked. As an example, we use a model based on nonlinearly realized electroweak symmetry that has been cited as evidence for a supercooled explanation.

University of Arizona researchers have developed an ‘attomicroscopy’ technique using a novel ultrafast electron microscope that captures moving electrons in unprecedented detail, paving the way for significant scientific breakthroughs in physics and other fields.

Imagine having a camera so advanced that it can capture freeze-frame images of a moving electron—an object so fast it could orbit the Earth multiple times in just a second. Researchers at the University of Arizona have developed the world’s fastest electron microscope capable of this remarkable feat.

They believe their work will lead to groundbreaking advancements in physics, chemistry, bioengineering, materials sciences, and more.

A superconductivity theory proposed by a Würzburg physics team has been validated in an international experiment that showed Cooper pairs display wave-like distribution in Kagome metals. The finding will enable new technological applications such as superconducting diodes.

To produce light, lasers typically rely on optical cavities, pairs of mirrors facing each other that amplify light by bouncing it back and forth. Recently, some physicists have been investigating the generation of “laser light” in open air without the use of optical cavities, a phenomenon known as cavity-free lasing in atmospheric air.

IOP Publishing has retracted a total of 350 papers from two different 2021 conference proceedings because an “investigation has uncovered evidence of systematic manipulation of the publication process and considerable citation manipulation.”

The case is just the latest involving the discovery of papers full of gibberish – aka “tortured phrases” – thanks to the work of Guillaume Cabanac, a computer scientist at the University of Toulouse, Cyril Labbé, of University Grenoble-Alpes and Alexander Magazinov, of Skoltech, in Moscow. The tool detects papers that contain phrases that appear to have been translated from English into another language, and then back into English, likely with the involvement of paper-generating software.

The papers were in the Journal of Physics: Conference Series (232 articles), and IOP Conference Series: Materials Science and Engineering (118 articles), plus four editorials.

Sometimes leaving well-enough alone is the best policy. Ask Teja Santosh Dandibhotla.

Upset that a paper of his had been retracted from the Journal of Physics: Conference Series, Santosh, a computer scientist at the CVR College of Engineering in Hyderabad, India, contacted us to plead his case. (We of course do not make decisions about retractions, we reminded him.)

Santosh’s article, “Intelligent defaulter Prediction using Data Science Process,” had been pulled along with some 350 other papers in two conference proceedings because IOP Publishing had “uncovered evidence of systematic manipulation of the publication process and considerable citation manipulation.”