Menu

Blog

Page 280

Aug 19, 2024

The surprising wall pattern that could keep buildings cooler

Posted by in category: space

A zigzag design can maximise how much heat walls radiate into space, while minimising heat absorption from the ground.

By Michael Le Page

Aug 19, 2024

AI boosts the power of EEGs, enabling neurologists to quickly, precisely pinpoint signs of dementia

Posted by in categories: biotech/medical, health, robotics/AI

ROCHESTER, Minn. — Mayo Clinic scientists are using artificial intelligence (AI) and machine learning to analyze electroencephalogram (EEG) tests more quickly and precisely, enabling neurologists to find early signs of dementia among data that typically go unexamined.

The century-old EEG, during which a dozen or more electrodes are stuck to the scalp to monitor brain activity, is often used to detect epilepsy. Its results are interpreted by neurologists and other experts trained to spot patterns among the test’s squiggly waves.

Continue reading “AI boosts the power of EEGs, enabling neurologists to quickly, precisely pinpoint signs of dementia” »

Aug 19, 2024

Computer simulations suggest more than half of people on Earth have limited access to safe drinking water

Posted by in categories: computing, sustainability

A multi-institutional team of environmental scientists has built a computer simulation showing that more than half of all people globally have limited access to safe drinking water. The findings are published in the journal Science.

Aug 19, 2024

3D-printed decoupled structural lithium-ion batteries that are stable, robust and customizable

Posted by in categories: 3D printing, energy, sustainability, transportation

The widespread adoption of electric vehicles greatly relies on the development of robust and fast-charging battery technologies that can support their continuous operation for long periods of time. One proposed energy storage solution to improve the endurance of electric vehicles entails the use of so-called structural batteries.

Structural batteries are batteries that can serve two purposes, acting both as structural components of vehicles and solutions. Instead of being external components that are added to an electronic or electric device, these batteries are thus directly embedded into the structure.

Researchers at Shanghai University and their collaborators recently devised a promising strategy to fabricate highly performing structural batteries with customizable geometric configurations. Their strategy, outlined in a paper published in Composites Science and Technology, enables the 3D-printing of structural lithium-ion batteries for different geometrical configurations.

Aug 19, 2024

Scientists discover phenomenon impacting Earth’s radiation belts

Posted by in category: climatology

Two University of Alaska Fairbanks scientists have discovered a new type of “whistler,” an electromagnetic wave that carries a substantial amount of lightning energy to the Earth’s magnetosphere.

Aug 19, 2024

New twist on synthesis technique promises sustainable manufacturing

Posted by in categories: materials, sustainability

James Tour’s lab at Rice University has developed a new method known as flash-within-flash Joule heating (FWF) that could transform the synthesis of high-quality solid-state materials, offering a cleaner, faster and more sustainable manufacturing process. The findings were published in Nature Chemistry on Aug. 8.

Aug 19, 2024

Novel electrolyte design shows promise for longer-lasting lithium-metal batteries

Posted by in categories: energy, sustainability

Lithium-metal batteries could exhibit significantly higher energy densities than lithium-ion batteries, which are the primary battery technology on the market today. Yet lithium-metal cells also typically have significant limitations, the most notable of which is a short lifespan.

Researchers at University of Science and Technology of China and other institutes recently introduced a new electrolyte design that could be used to develop highly performing lithium-metal pouch cells with longer lifespans. This electrolyte, presented in a paper in Nature Energy, has a unique nanometer-scale solvation structure, with pairs of ions densely packed together into compact ion-pair aggregates (CIPA).

“The primary objectives of our recent work are to markedly accelerate the practical applications of lithium-metal batteries and offer deep mechanistic understandings of this complicated system,” Prof. Shuhong Jiao, co-author of the paper, told Tech Xplore.

Aug 19, 2024

New statistical mechanics formula suggests urban street networks and building density shape severity of floods

Posted by in categories: climatology, engineering, physics

Cities around the globe are experiencing increased flooding due to the compounding effects of stronger storms in a warming climate and urban growth. New research from the University of California, Irvine suggests that urban form, specifically the building density and street network of a neighborhood, is also affecting the intensity of flooding.

For a paper published today in Nature Communications, researchers in UC Irvine’s Department of Civil and Environmental Engineering turned to statistical mechanics to generate a new formula allowing to more easily assess flood risks presented by land development changes.

Co-author Mohammad Javad Abdolhosseini Qomi, UC Irvine associate professor of civil and environmental engineering who holds a joint appointment in UC Irvine’s Department of Materials Science and Engineering, said that he and his colleagues were inspired by how physicists study intricate systems such as disordered porous solids, glasses and complex fluids to develop universal theories that can explain city-to-city variations in flood hazards.

Aug 19, 2024

Geophysicists find link between seismic waves called PKP precursors and strange anomalies in Earth’s mantle

Posted by in category: futurism

For the decades since their discovery, seismic signals known as PKP precursors have challenged scientists. Regions of Earth’s lower mantle scatter incoming seismic waves, which return to the surface as PKP waves at differing speeds.

Aug 19, 2024

Revolutionary Quantum Compass Could Soon Make GPS-Free Navigation a Reality

Posted by in categories: computing, mobile phones, particle physics, quantum physics, satellites

Peel apart a smartphone, fitness tracker or virtual reality headset, and inside you’ll find a tiny motion sensor tracking its position and movement. Bigger, more expensive versions of the same technology, about the size of a grapefruit and a thousand times more accurate, help navigate ships, airplanes and other vehicles with GPS assistance.

Now, scientists are attempting to make a motion sensor so precise it could minimize the nation’s reliance on global positioning satellites. Until recently, such a sensor — a thousand times more sensitive than today’s navigation-grade devices — would have filled a moving truck. But advancements are dramatically shrinking the size and cost of this technology.

For the first time, researchers from Sandia National Laboratories have used silicon photonic microchip components to perform a quantum sensing technique called atom interferometry, an ultra-precise way of measuring acceleration. It is the latest milestone toward developing a kind of quantum compass for navigation when GPS signals are unavailable.

Page 280 of 11,884First277278279280281282283284Last