Australian scientists have joined an elite club of just eight around the world, making a perovskite solar cell that can hit 30 per cent efficiency.
Led by storied University of Sydney professor Anita Ho-Baillie, the Sydney team’s work was weighed and measured by the US National Renewable Energy Laboratory (NREL).
“It shows that we are capable of producing high performance cells. The next step we will achieve is higher performance, either by double junction or triple junction,” Ho-Baillie says.
A team of applied physicists at Columbia University, working with a colleague from Henry M. Gunn High School, and another from the University of California, Los Angeles, has found that using corrugated siding on outdoor building walls can passively reduce wall temperatures.
In their paper published in the journal Nexus, the group describes how they added corrugated siding to a small test building and found that doing so lowered the wall temperatures.
Prior research has shown that covering the tops of buildings with radiative cooling materials can reduce the amount of heat that makes its way inside by up to 20%. This is because they are made in such a way as to reflect sunlight and radiate heat into outer space.
Could the astonishing language abilities of LLMs hint at a deeper, more fundamental consciousness woven into the fabric of reality itself?
Something seems to be missing from the universe, and the favored model of physics calls it “dark matter” – but despite a century of searching, it remains a no-show. A new paper proposes an alternative hypothesis, showing how gravity could exist without mass and produce many of the same effects we ascribe to dark matter.
Einstein’s theory of general relativity is still our best model for describing gravity. As you might remember from high school physics class, gravity is the force that arises from masses resting on the fabric of spacetime. The more mass an object has, the deeper the “dip” in spacetime and the stronger the gravitational pull.
But starting in the 1930s, some strange astronomical observations began to raise questions. Galaxy clusters seemed to be moving much too fast to stay stable based on visible matter, suggesting that far more matter was present than we could see. That led to the hypothesis that huge amounts of invisible stuff – which was dubbed dark matter – pervaded the universe. The idea has held surprisingly strong in observations in the decades since, backed up by the motions of stars within galaxies and the bending and magnifying of light through gravitational lenses.
Quantum computing is one of those “just around the corner” technologies that have the scientific community split. Tech outfits such as Google and IBM have gone full throttle with both research and development and marketing as if they’re already here, while many independent researchers have claimed quantum computers will never work.
Most people working in the field, however, believe that quantum computers will be able to solve problems that classical computers can’t solve within the next 10 years.
This is according to a recent survey of 927 people with associations to the field of quantum computing (researchers, executives, press, enthusiasts, etc.) conducted by QuEra. Of those surveyed, 74.9% “expect quantum to be a superior alternative to classical computing for certain workloads” within the next 10 years.
Posted in health
Photon Bose–Einstein condensation is observed in a semiconductor laser, where thermalization and condensation of photons occur using an InGaAs quantum well and an open microcavity. The distinction between regimes of photon Bose–Einstein condensation and conventional lasing are clearly identified.
Anyone who’s tried to neatly gather a fitted sheet can tell you: folding is hard. Get it wrong with your laundry and the result can be a crumpled, wrinkled mess of fabric, but when folding fails among the approximately 7,000 proteins with an origami-like complexity that regulate essential cellular functions, the result can lead to one of a multitude of serious diseases ranging from emphysema and cystic fibrosis to Alzheimer’s disease.
A very dangerous position to be in the world community of scientist should gather in agreement those friendly to the values and principles of democracy to advance science for the good humanity and freedom.
The U.S. sorely needs a coordinated national research strategy, says Marcia McNutt, president of the U.S. National Academy of Sciences.
In a first-ever “State of the Science” address at the end of June, National Academy of Sciences president Marcia McNutt warned that the U.S. was ceding its global scientific leadership to other countries—highlighting China in particular. McNutt, a widely respected geophysicist, said this slippage could make it harder for the U.S. to maintain the strength of its economy and protect its national security. She also laid out a provisional plan of action to reverse the decline.
