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Showing posts with the label Physics

A new holographic microscope allows scientists to see through the skull and image the brain

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A new kind of holographic microscope was created by researchers under the direction of Associate Director CHOI Wonshik of the Center for Molecular Spectroscopy and Dynamics within the Institute for Basic Science, Professor KIM Moonseok of The Catholic University of Korea, and Professor CHOI Myunghwan of Seoul National University. The new microscope reportedly has the ability to "see through" the intact skull and can image the neuronal network in a living mouse brain in high-resolution 3D without removing the skull. * A substantial amount of light energy must be delivered to the sample in order to examine its interior structures using light, and the signal reflected from the target tissue must be precisely measured. It is challenging to produce clear images in live tissues due to the numerous scattering effects and severe aberration1 that frequently happen when light strikes the cells. Light experiences repeated scattering in intricate structures like living tissue, which caus...

Physicists just gifted us ‘quantum spin liquid,’ a weird new state of matter

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Atoms that are essentially locked in an ordered framework make up solids. On the other hand, atoms in a liquid can freely move past and around one another. But consider atoms that are continually shifting magnetic messes and remain non-frozen, similar to those in a liquid. The result is a quantum spin liquid, a hitherto unheard-of quantum strangeness state of matter. Researchers have now achieved this state in the lab by carefully manipulating atoms. On December 2, the researchers published their findings in the journal Science. For years, scientists had debated several spin liquids ideas. The project's coordinator and one of the paper's authors, Harvard University physicist Giulia Semeghini, adds, "But we really got extremely interested in this when these theorists, here at Harvard, eventually established a mechanism to actually make the quantum spin liquids." The laws of quantum mechanics can twist atoms into a variety of exotica when applied under severe circumstan...

Never Shower During a Thunderstorm. A Physicist Explains Why

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For the UK, the Met Office has issued a number of "yellow thunderstorm warnings," emphasizing the likelihood of frequent lightning. While there is a little chance that you will be struck by lightning, it is still crucial to know how to keep safe while a thunderstorm is in the area. Around 24,000 individuals are killed by lightning each year worldwide, and another 240,000 suffer injuries. Basic precautions against thunderstorms, like avoiding standing near windows or beneath trees, are known to the majority of people (mobile phones are safe). But did you know that during a thunderstorm, you shouldn't wash the dishes, take a bath, or take a shower? You must first have a basic understanding of how thunderstorms and lightning function in order to comprehend why. Moisture and rising warm air—two fundamental components that, of course, go hand in hand with summer—are what make thunderstorms thrive. Huge amounts of moist air are produced by the high temperatures and humidity, an...
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The achievement of a fusion reaction that self-perpetuates (instead of fizzling out) last year, confirmed by scientists, brought us one step closer to simulating the chemical reaction that drives the Sun. They are unsure of how to conduct the experiment again, though. When two atoms join to form a heavier atom, nuclear fusion takes place, releasing an enormous amount of energy in the process. It's a process that occurs frequently in nature, but because it requires a high-energy environment to maintain the reaction, it's exceedingly challenging to recreate in the lab. The Sun uses nuclear fusion to produce energy by fusing hydrogen atoms to produce helium. Nuclear fusion is also used by supernovae, which are the explosions of suns, to produce spectacular cosmic fireworks. Heavyer molecules like iron are produced by these reactions because of their strength. However, heat and energy tend to escape from manmade environments on Earth via cooling processes including x-ray radiation...

Artificial Intelligence Discovers Alternative Physics

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Energy, mass, and speed The famous equation E=MC2 of Albert Einstein has these three elements. However, how did Albert Einstein come to hear about these ideas at all? Comprehending relevant variables is a prerequisite to understanding physics. Without the notions of energy, mass, and velocity, not even Einstein could have discovered relativity. But can these kinds of variables be found automatically? This would speed up scientific research significantly. Researchers at Columbia Engineering asked a brand-new artificial intelligence software this inquiry. The AI software was created to use a video camera to examine physical occurrences before attempting to identify the smallest possible collection of fundamental variables that may adequately capture the dynamics being witnessed. On July 25, the work was released in the journal Nature Computational Science. A chaotic swing stick dynamical system is seen moving in the image. Our approach seeks to directly extract from high-dimensional vide...