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Aluminum oxide's irregular atomic surface explains its low reactivity

Aluminum oxide's irregular atomic surface explains its low reactivity Gaby Clark Scientific Editor Robert Egan Associate Editor Why do certain surfaces behave very differently from what theoretical calculations suggest? Scientists long assumed that the aluminum oxide surface should be highly reactive and capable of splitting water molecules. In experiments, however, this behavior is barely observed.

Phys.org 7d ago

California's tectonic stress has reached record level, earthquake model reveals

California's tectonic stress has reached record level, earthquake model reveals Gaby Clark Scientific Editor Robert Egan Associate Editor Earthquakes usually occur along fracture zones in Earth's crust, where large tectonic plates slide past one another and become locked. Stress builds up over long periods and is suddenly released in the form of an earthquake. In Southern California, the San Andreas and San Jacinto faults are among the most significant of these zones, accommodating most of...

Phys.org 2d ago

The Russian who invented semiconductors 25 years before the USA

TIL: The Man Who Invented the Future, Then Starved to Death in It The story of Oleg Losev, LEDs, and a lost manuscript describing a new three-electrode semiconductor device There is a particular kind of tragedy reserved for people who are right too early. Oleg Losev was 18 years old, working as a technician at a Soviet radio lab in Nizhny Novgorod, when he built something in early 1922 that the rest of the world would take another 25 years to catch up to. He would never hold a position...

Hacker News 3d ago

Dynamic terahertz wavefront control using stretchable single-walled carbon nanotube-based metasurfaces

Dynamic terahertz wavefront control using stretchable single-walled carbon nanotube-based metasurfaces Sadie Harley Scientific Editor Alexander Pol Deputy Editor The terahertz (THz) frequency regime, sitting between microwaves and infrared light, has long promised revolutionary advances in wireless communication, security imaging and nondestructive sensing. A key roadblock, however, has been the lack of compact, dynamically tunable components capable of manipulating THz beams on demand....

Phys.org 3d ago

CBSE students demand grace marks, fee waiver over evaluation errors

Pune: Several CBSE Std XII students across the country have launched a coordinated demand for grace marks and a complete waiver of verification and re-evaluation fees, claiming that technical problems linked to the board’s new On-Screen Marking (OSM) system led to unusually low scores, unchecked answers and delayed access to answer sheets at a crucial stage of the admission season. The demand came as students applying for engineering, medical, commerce and overseas university programmes said...

Times of India 4d ago

3D-printed nozzle array could streamline production of drug-delivery microparticles

3D-printed nozzle array could streamline production of drug-delivery microparticles Lisa Lock Scientific Editor Robert Egan Associate Editor MIT researchers have demonstrated a low-cost design for specialized electronic nozzles, called triaxial electrospray emitters, that could be used to manufacture time-release drug-delivery particles or self-healing materials efficiently and at scale. Triaxial electrospray emitters use electricity to precisely dispense three liquids from microscopic...

Phys.org 1d ago

2 giant 'super Earths' once orbited near Uranus and Neptune, messed up a bunch of moons, then vanished, new study hints

2 giant 'super Earths' once orbited near Uranus and Neptune, messed up a bunch of moons, then vanished, new study hints Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The findings paint a more crowded picture of the early outer solar system than previously thought. Something doesn’t quite add up about the orbits of our solar system’s eight planets and their hundreds of moons, a new study hints.

Live Science 1d ago

Satellite images reveals mangroves rebounding worldwide — but here's why they could still 'drown'

Satellite images reveals mangroves rebounding worldwide — but here's why they could still 'drown' A new study finds mangrove forests are no longer shrinking worldwide, offering hope for coastal protection and climate resilience. But other research warns sea level rise could reduce their ability to store carbon. Mangrove forests, long considered among the world's most threatened ecosystems, are now showing signs of global rebound, a new study reports.

Live Science 6d ago

'Crystals' of space-time could be the origins of certain rare black holes, theoretical study hints

'Crystals' of space-time could be the origins of certain rare black holes, theoretical study hints By taking general relativity into higher dimensions, a trio of physicists has proven that a mathematical pattern of ripples in space-time geometry could give rise to naked singularities and microscopic black holes. A new theoretical study adds fresh support to the idea that a mathematical pattern of ripples in space-time geometry could give rise to naked singularities and microscopic black...

Live Science 3d ago

Bounded by Risk, Not Capability: Quantifying AI Occupational Substitution Rates via a Tech-Risk Dual-Factor Model

Announce Type: replace Abstract: The deployment of Large Language Models (LLMs) has ignited concerns about technological unemployment. Existing task-based evaluations predominantly measure theoretical "exposure" to AI capabilities, ignoring critical frictions of real-world commercial adoption: liability, compliance, and physical safety. We argue occupations are not eradicated instantaneously, but gradually encroached upon via atomic actions.

arXiv CS 1d ago