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Spherical Harmonics
3D visualization tool of spherical harmonics. Visualize and compare real, imaginary, and complex components by adjusting the degree l and order m parameters.
New
The latest blog posts to take off on Hacker News. 4,455 posts.
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Music and Geometry: Intervals and Scales
An article about music and geometry, in particular about musical intervals and scales and their geometric equivalent ...
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Moon
Interactive article about the Moon
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Ham radio operators receive signals from Voyager 1 on Dwingeloo telescope
We have used the historic Dwingeloo radio telescope to receive signals from the Voyager 1 spacecraft. Only a few telescopes in the world have received these signals, which are very faint due to the distance of Voyager 1: almost 25 billion kilometers, more than four times the distance to Pluto.
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Our muscles will atrophy as we climb the Kardashev Scale
If you like this, you might also like my Instagram channel Nerd on Bars @nerdonbars where I calculate the power output of various athletes and myself.
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The Antikythera mechanism – 254:19 ratio
A couple of followups on a recent episode of In Our Time.
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School smartphone ban results in better sleep and improved mood: study
Psychologists at the University of York, who tested the impact that smartphones have on children’s behaviour for a new two-part documentary series for Channel 4, found that a ban in school impacted positively on sleep and mood.
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Hacking physics from the back of a napkin (2020)
February 24, 2020. The computational power of a humble napkin is awesome. I discuss three napkin algorithms — dimensional analysis, Fermi estimates, and random walks — and use them to figure out why rain falls, the length of the E. coli genome, and the mass of a proton, among other things. These examples suggest a…
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Researchers discover new third class of magnetism
A new class of magnetism called altermagnetism has been imaged for the first time in a new study. The findings could lead to the development of new magnetic memory devices with the potential to increase operation speeds of up to a thousand times.
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Noninvasive imaging method can penetrate deeper into living tissue
MIT researchers developed a non-invasive imaging technique that enables laser light to penetrate deeper into living tissue, capturing sharper images of cells. This could help clinical biologists study disease progression and develop new medicines.
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Study reveals mammoth as key food source for ancient Americans
Scientists have uncovered the first direct evidence that ancient Americans relied primarily on mammoth and other large animals for food. Their research sheds new light on both the rapid expansion of humans throughout the Americas and the extinction of large ice age mammals.
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The case against Google's claims of "quantum supremacy"
The 2019 paper “Quantum supremacy using a programmable superconducting processor” asserted that Google’s Sycamore quantum computer, with 53 qubits and a depth of 20, performed a specific computat…
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ALICE finds first ever evidence of the antimatter partner of hyperhelium-4
The finding also represents the first evidence of the heaviest antimatter hypernucleus yet at the LHC
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Willow, Our Quantum Chip
Our new quantum chip demonstrates error correction and performance that paves the way to a useful, large-scale quantum computer.
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CT Scans of New vs. Used SawStop
CT scans of a new and deployed SawStop brake reveal the fuse wire, spring mechanism, and pawl collapse zones that stop a spinning saw blade in under 5 ms.
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The marvelous disappearing capacitor
The performance of photodiode amplifiers can be improved in a clever way.
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Can life emerge around a white dwarf?
Yes the tidal forces would be a problem with the Roche limit and Hill Sphere. The planet might break apart in the life belt around a white dwarf star or crash into the white dwarf. The planet has to be too close to the white dwarf to be in the life belt.
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Fructose in diet enhances tumor growth: research
Fructose is a sweetener added to ultra-processed foods, typically in the form of high-fructose corn syrup. WashU research shows that the liver turns fructose into lipids that many types of cancers crave.
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The largest open-source dataset of car designs, including their aerodynamics
DrivAerNet++, the largest open-source dataset for car aerodynamics developed to date, can be used to quickly train an AI model to generate novel car designs. This process could potentially lead to more fuel-efficient cars and electric vehicles with longer range.
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Researchers get 'compact' hard X-ray machine to work
After years of research, TU/e scientists Jom Luiten and Peter Mutsaers and their team have successfully generated high-quality hard X-rays with a compact device.
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A pro-science, pro-progress, techno-optimistic health textbook from 1929
"Science and The Way to Health" by Andress and Brown
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Nearly half of teenagers globally cannot read with comprehension
The chart shows the share of children at the end of lower-secondary school age — aged 12 to 15 — who meet the minimum proficiency set by UNESCO in reading comprehension. This means they can connect the main ideas across various texts, understand the author’s intentions, and draw reasoned conclusions.
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Derivative at a Discontinuity
Alok Singh's Blog
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Researchers use AI to turn sound recordings into street images
AUSTIN, Texas — Using generative artificial intelligence, a team of researchers at The University of Texas at Austin has converted sounds from audio
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Square roots and maxima
A brief numerical and graphical check on a 3Blue1Brown video.
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Chinese pebble-bed nuclear reactor passes "meltdown" test
New testing done at China’s Shidaowan nuclear power plant has confirmed its ability to be naturally cooled down, an industry-first milestone for achieving commercial-scale inherent safety, according to researchers.
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Student rocket group shatters amateur space record
Aftershock II is believed to be the world’s first civilian-built rocket to reach an altitude of 470,000 feet.
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Vesuvius Challenge: First letters found in new scroll
PHerc. 172 (Scroll 5) is here.