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Sep 25, 2022
Report: CCP recruited dozens of scientists from top US nuclear lab
Posted by Dan Breeden in categories: government, military
https://www.youtube.com/watch?v=Ggk97CBDqds
According to a revealing private intelligence report published by Strider Technologies, at least 154 Chinese scientists who worked on U.S. government-sponsored research at the country’s top national security laboratory have been recruited to perform scientific work in China. They are working on the design and manufacture of nuclear weapons, which is considered a high national security risk.
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#ChinaRevealed #ChinaNews
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Sep 25, 2022
Lithium-ion battery material breaks barrier on fast charging
Posted by Chima Wisdom in categories: energy, sustainability, transportation
Researchers at the Department of Energy’s Oak Ridge National Laboratory and the University of Tennessee, Knoxville, discovered a key material needed for fast-charging lithium-ion batteries. The commercially relevant approach opens a potential pathway to improve charging speeds for electric vehicles.
Lithium-ion batteries, or LIBs, play an essential role in the nation’s portfolio of clean energy technologies. Most hybrid electric and all–electric vehicles use LIBs. These rechargeable batteries offer advantages in reliability and efficiency because they can store more energy, charge faster and last longer than traditional lead-acid batteries. However, the technology is still developing, and fundamental advances are needed to meet priorities to improve the cost, range and charge time of electric-vehicle batteries.
“Overcoming these challenges will require advances in materials that are more efficient and synthesis methods that are scalable to industry,” said ORNL Corporate Fellow and corresponding author Sheng Dai.
Sep 25, 2022
Intervening to stop bone loss
Posted by 21st Century Tech Blog in category: biotech/medical
U. Penn research finds protein associated with bone loss which may lead to treatment for osteoporosis, periodontitis, rheumatoid arthritis and fractures.
A study led by Shuying (Sheri) Yang of the School of Dental Medicine identified a new role for a protein that keeps osteoclasts—the cells that break down bone—in check, and may guide the development of new therapies to counter bone loss.
Sep 25, 2022
Prototype: I hope we build an artificial super intelligence system soon
Posted by Dan Breeden in category: transportation
Provided to YouTube by Ingrooves.
Prototype · Front Line Assembly.
Continue reading “Prototype: I hope we build an artificial super intelligence system soon” »
Sep 25, 2022
How infinity threatens cosmology
Posted by Dan Breeden in categories: cosmology, mathematics, physics
Infinity is back. Or rather, it never (ever, ever…) went away. While mathematicians have a good sense of the infinite as a concept, cosmologists and physicists are finding it much more difficult to make sense of the infinite in nature, writes Peter Cameron.
Each of us has to face a moment, often fairly early in our life, when we realize that a loved one, formerly a fixture in our life, was not infinite, but has left us, and that someday we too will have to leave this place.
This experience, probably as much as the experience of looking at the stars and wondering how far they go on, shapes our views of infinity. And we urgently want answers to our questions. This has been so since the time, two and a half millennia ago, when Malunkyaputta put his doubts to the Buddha and demanded answers: among them he wanted to know if the world is finite or infinite, and if it is eternal or not.
Sep 25, 2022
Terahertz light from superconducting stripes
Posted by Dan Breeden in categories: materials, quantum physics
Why do some materials carry electrical currents without any resistance only when cooled to near absolute zero while others do so at comparatively high temperatures? This key question continues to vex scientists studying the phenomenon of superconductivity. Now a team of researchers from Andrea Cavalleri’s group at the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg has provided evidence that electron “stripes” in certain copper-based compounds may lead to a break in the material’s crystal symmetry, which persists even in their superconducting state. Their work has been published in PNAS.
Focusing on a range of cuprates, the team investigated the coexistence and competition of their superconducting state with other quantum phases. Such interactions are believed to be crucial to the development of high-temperature superconductivity—a process which remains one of the most important unsolved problems in condensed matter physics today.
The researchers exposed several cuprate crystals, grown and characterized at Brookhaven National Labs, to ultrashort laser light pulses. They observed how the materials began to emit a particular type of terahertz (THz) light—a technique known as THz emission spectroscopy.
Sep 25, 2022
A new experimental study tackles the unsolved mystery of ‘nanobubbles’
Posted by Dan Breeden in category: physics
Nanobubbles are extremely small (i.e., nanoscopic) gaseous cavities that some physicists observed in aqueous solutions, typically after specific substances were dissolved in them. While some studies reported the observation of these incredibly tiny bubbles, some scientists have argued that they are merely solid or oily residues formed during experiments.
Researchers at Centro de Investigación y de Estudios Avanzados Unidad Monterrey and Centro de Investigación en Matemáticas Unidad Monterrey in Mexico have recently carried out an experiment aimed at further investigating the nature of these elusive and mysterious objects, specifically when xenon and krypton were dissolved in water. Their study, featured in Physical Review Letters, identified the formation of what the team refers to as “nanoblobs,” yet found no evidence of nanobubbles.
“Our aim was to create xenon and krypton nanobubbles using a clean method,” Carlos Ruiz Suarez, one of the researchers who carried out the study, told Phys.org. “I must say that many scientists claim that nanobubbles, despite their use in many applications, do not exist. Rather, it is thought that they are oil/solid contaminants formed during the experiments.”
Sep 25, 2022
Substances trapped in nanobubbles exhibit unusual properties
Posted by Dan Breeden in categories: chemistry, information science, nanotechnology, physics
Skoltech scientists modeled the behavior of nanobubbles appearing in van der Waals heterostructures and the behavior of substances trapped inside the bubbles. In the future, the new model will help obtain equations of state for substances in nano-volumes, opening up new opportunities for the extraction of hydrocarbons from rock with large amounts of micro-and nanopores. The results of the study were published in the Journal of Chemical Physics.
The van der Waals nanostructures hold much promise for the study of tiniest samples with volumes from 1 cubic micron down to several cubic nanometers. These atomically thin layers of two-dimensional materials, such as graphene, hexagonal boron nitride (hBN) and dichalcogenides of transition metals, are held together by weak van der Waals interaction only. Inserting a sample between the layers separates the upper and bottom layers, making the upper layer lift to form a nanobubble. The resulting structure will then become available for transmission electron and atomic force microscopy, providing an insight into the structure of the substance inside the bubble.
The properties exhibited by substances inside the van der Waals nanobubbles are quite unusual. For example, water trapped inside a nanobubble displays a tenfold decrease in its dielectric constant and etches the diamond surface, something it would never do under normal conditions. Argon which typically exists in liquid form when in large quantities can become solid at the same pressure if trapped inside very small nanobubbles with a radius of less than 50 nanometers.
