Shear ultrasound shaking found to lower friction between solids
When high-frequency shaking occurs at an interface between two solids, recent experiments have revealed that the frictional forces between the objects can be weakened. Through a simple new experiment detailed in The European Physical Journal E, Julie.....»»
Glassy shell of microscopic algae inspires tiny ultrasound detectors for medical imaging
A multidisciplinary team of researchers from Skoltech has discovered the resonance frequencies of diatom frustules. These intricately structured silicon dioxide shells of single-celled microalgae provide a promising model for nature-inspired electron.....»»
Grinding coffee with a splash of water reduces static electricity and makes more consistent and intense espresso: Study
The fracturing and friction of coffee beans during grinding generates electricity that causes coffee particles to clump together and stick to the grinder. Researchers report Dec. 6 in the journal Matter that coffee beans with higher internal moisture.....»»
Unlocking the secrets of oobleck—strange stuff that’s both liquid and solid
Scientists tested hypothesis with dense suspensions of piezoelectric nanoparticles. Enlarge / "Oobleck" is a classic kitchen science example of a shear-thickening non-Newtonian fluid. (credit: Screenshot/PBS) Oobleck has.....»»
"Unintended consequences": friction at COP28 over green trade
Inside the negotiating rooms and on the sidelines of the COP28 climate talks, simmering tensions over wealthy countries' "green trade" policies have been bubbling to the surface, with developing nations fearful they will be penalized......»»
Control over friction, from small to large scales
Friction is hard to predict and control, especially since surfaces that come in contact are rarely perfectly flat. New experiments demonstrate that the amount of friction between two silicon surfaces, even at large scales, is determined by the formin.....»»
Acoustic diffraction-resistant adaptive profile technology for elasticity imaging
Acoustic beam shaping with high degrees of freedom is critical for ultrasound imaging, acoustic regulation, and stimulation. The ability to fully regulate the acoustic pressure profile relative to its propagation path remains to be achieved......»»
OpenAI to name ex-Twitch chief Emmett Shear as new boss
The tech firm will reportedly appoint Emmett Shear while ousted chief Sam Altman is joining Microsoft......»»
OpenAI to name new boss after firing co-founder
The tech firm will reportedly appoint Emmett Shear after the chaotic ousting of former chief Sam Altman......»»
The echoes from inflation could still be shaking the cosmos today
In the very early universe, physics were weird. A process known as inflation, during which the universe went from a single infinitesimal point to everything we see today, was one such instance of those weird physics. Now, scientists from the Chinese.....»»
Learning about seismic signatures when the Earth moves: Earthquake risk in Indonesia
Professor Nick Rawlinson is fascinated by the shifting crust of the planet, the jostle of tectonic plates, the rupture of faults and the shaking of the earth......»»
Your next noise-canceling earbuds may use Navy sonar tech
Next-gen driver technology from xMEMS uses ultrasound technology developed in the 1960s by the U.S. Navy......»»
Study leverages chiral phonons for transformative quantum effect
Quantum materials hold the key to a future of lightning-speed, energy-efficient information systems. The problem with tapping their transformative potential is that in solids, the vast number of atoms often drowns out the exotic quantum properties el.....»»
Global warming–induced sea level changes could increase earthquake risk
Earthquakes often occur along plate boundaries, when sudden movements of the "stuck" plates release elastic strain energy, sending out seismic waves that result in the ground shaking familiar to many worldwide. More rarely, earthquakes occur within p.....»»
Generating cold with solids
After more than a century, physicists aim to dethrone the tried-and-tested technology of the refrigerator, as cooling can be made more energy-efficient......»»
Webb findings support long-proposed process of planet formation
Scientists using James Webb Space Telescope just made a breakthrough discovery in revealing how planets are made. By observing water vapor in protoplanetary disks, Webb confirmed a physical process involving the drifting of ice-coated solids from the.....»»
The Vision Pro is the wrong product at the wrong time for Apple
Apple’s rollout of the Vision Pro could hamper its sales, a report has claimed, with a high price and in-person appointments adding to the sales friction......»»
Why does it get hot when you rub things together? Unraveling the mystery of dynamic friction at the atomic level
Friction, an everyday phenomenon, has perplexed scientists for centuries. Though extensively researched, our understanding remains fragmented, primarily due to the multifaceted interactions that span across varying scales. Achieving an accurate grasp.....»»
Concave, umbrella-like metal complexes provide space for giant molecular rotors to operate in solid state
Solid materials are generally known to be rigid and unmoving, but scientists are turning this idea on its head by exploring ways to incorporate moving parts into solids. This can enable the development of exotic new materials such as amphidynamic cry.....»»
Ultrasound may rid groundwater of toxic "forever chemicals"
New research suggests that ultrasound may have potential in treating a group of harmful chemicals known as PFAS to eliminate them from contaminated groundwater......»»
Researchers dynamically tune friction in graphene
The friction on a graphene surface can be dynamically tuned using external electric fields, according to researchers at the University of Illinois Urbana-Champaign led by Professor Rosa Espinosa-Marzal of the Department of Civil and Environmental Eng.....»»