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“#Inexpensive, accessible device provides visual proof that masks block droplets” Credit: Pixabay/CC0 Public Domain Duke physician Eric Westman was one of the first champions of masking as a means to curtail the spread of coronavirus, working with a local non-profit to provide free masks to at-risk and under-served populations in the greater Durham community. But…
“#Scientists develop principles for the creation of an ‘acoustic diode’” Credit: CC0 Public Domain In research published in Science Advances, a group led by scientists from the RIKEN Center for Emergent Matter Science (CEMS) have used the principle of magneto-rotation coupling to suppress the transmission of sound waves on the surface of a film in…
“#Measuring electron emission from irradiated biomolecules” Credit: Pixabay/CC0 Public Domain When fast-moving ions cross paths with large biomolecules, the resulting collisions produce many low-energy electrons which can go on to ionize the molecules even further. To fully understand how biological structures are affected by this radiation, it is important for physicists to measure how electrons…
“#Updating Turing’s model of pattern formation” Credit: CC0 Public Domain In 1952, Alan Turing published a study which described mathematically how systems composed of many living organisms can form rich and diverse arrays of orderly patterns. He proposed that this ‘self-organization’ arises from instabilities in un-patterned systems, which can form as different species jostle for…
“#Researchers tease out the unique chemical fingerprint of the most aggressive free radical in living things” The ionization of water produces a hydroxyl radical, an extremely powerful oxidizing agent that damages living organisms. Using LCLS, a team hit this shortlived radical with an ultrafast x-ray laser pulse (blue arrow), exciting one of its electrons (red…
“#Q&A: Harnessing sound to better monitor aging pipeline infrastructure” Animation showing focusing of L(0,2) pipe mode along a 4-inch pipe with GRIN lens. Credit: Tol Lab Underground pipelines, some as old as the cities they service, are often far past their intended lifespan and the need for replacing them looms as an expense most municipalities…
“#Demonstrating the Mpemba effect in a controlled setting” Schematic of the energy landscape and Boltzmann distribution for the Mpemba effect. Credit: Nature (2020). DOI: 10.1038/s41586-020-2560-x A pair of physicists at Simon Fraser University has developed a means for demonstrating the Mpemba effect in a controlled setting. In their paper published in the journal Nature, Avinash…
“#Harnessing chaos could help climate modeling take leap forward” Credit: CC0 Public Domain Understanding the chaotic variability of the climate and its response to climate change could help scientists better forecast changes that still elude even the most sophisticated models. A mathematical framework proposed in the journal Reviews of Modern Physics aims to incorporate coherently…
“#ATLAS experiment reports the observation of photon collisions producing weak-force carriers” A 2018 ATLAS event display consistent with the production of a pair of W bosons from two photons, and the subsequent decay of the W bosons into a muon and an electron (visible in the detector) and neutrinos (not detected). Credit: CERN During the…
“#Professor’s milestone in nuclear physics seeks to understand the universe itself” An atom. Credit: Florida International University A nuclear physics professor from Florida International University was among a team of researchers that proposed something so out of this world, colleagues first hesitated to accept it was possible. In 1993, they boldly predicted how the densest…