🧵 time dilation & time as a dimension
Anonymous at Tue, 22 Oct 2024 18:56:48 UTC No. 16444515
this still makes no sense to me.
time is a human convention. when you measure the difference between two clocks at a distance, you're measuring a difference induced on the physical clock by some mechanical force or another, you aren't measuring a difference in "time". there is no "time", there are only clocks and human minds to interpret them.
if it had any definition time would be an invariant, inaccessible, and eternal. it makes absolutely no sense to speak of time taking part in the universe, or of "spacetime".
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Anonymous at Tue, 22 Oct 2024 18:38:57 UTC No. 16444485
Riddle me this, cosmologists. Inflation is described a second-order phase transition in Guth’s original paper. This means it needs a scalar field. The Higgs’ vev is too small to account for the inflation rate. Guth coped with this by saying there might be due to a GUT symmetry braking. This was of course before the simplest GUTs were ruled out by setting bounds on proton decay. So the million dollar question is: why is inflation universally accepted in the field if we have no evidence of that scalar field nor a satisfactory particle physics model to include it?
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Anonymous at Tue, 22 Oct 2024 15:04:12 UTC No. 16444201
do we know there aren't any more primes between the new largest prime and now second largest prime? perhaps one that isn't some power of 2 minus 1?
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Anonymous at Tue, 22 Oct 2024 13:45:19 UTC No. 16444110
Why do so many Indians make youtube tutorial science and math videos and they all insist on making complete DOGSHIT presentations and are seemingly COMPLETELY unaware that their accents and fast paced monotone speech is completely incomprehensible to the average person?
Mindboggling
🧵 Best way to transcribe lectures?
Anonymous at Tue, 22 Oct 2024 09:47:44 UTC No. 16443874
Last week i started university and an older colleague (getting his second degree) suggested me to transcribe lectures. I'm trying to do it in the most low effort way possible, because i usually study on my notes so i don't really need the transcriptions.
What i do right now is:
-record the lecture
-get it transcribed by whisper AI
-Get it elaborated by chatGPT (corrects the errors that whisper does).
Whisper works quite well, but the last passage with chatGPT is a pain in the ass. It can't handle long prompts, so i have to divide the trascription in many samples, and the output is often wrong (it cuts out parts of the text even tough i specify to just correct errors and give me back the entire lenght of the text)
If you transcribe lectures too, please tell me your method. I'd like something more straight-forward on the elaboration of the text part. Ty.
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Anonymous at Tue, 22 Oct 2024 08:47:05 UTC No. 16443825
>et al
Seriously who is this al guy and how is he in so many papers? Is he really that smart?
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Anonymous at Tue, 22 Oct 2024 08:19:04 UTC No. 16443786
Do you read books? It feels like they are a relic of the past and inefficient to gather useful information.
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Anonymous at Tue, 22 Oct 2024 07:04:48 UTC No. 16443738
SI prefixes between 0.001 and 1000 are useless
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Anonymous at Tue, 22 Oct 2024 06:26:34 UTC No. 16443712
>superdeterminism is wrong because it hurts my feelings
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Anonymous at Tue, 22 Oct 2024 06:19:48 UTC No. 16443700
Has anyone here ever heard of Synergetics?
No, I don't mean synergy. I mean the idea that all matter is comprised of Tetrahedrons (four sided pyramids).
https://en.wikipedia.org/wiki/Syner
This theory was postulated by Buckminster Fuller, the inventor of the Geodesic Dome, one of the strongest possible 3D structures still used by military today, as well as the concept of Tensegrity.
Tetrahedrons were chosen because of the idea at the time (and still today) that the smallest unit of matter is a sphere. However, if this were true, then the smallest possible alignment of four spheres of equal size would have to be the tetrahedron, making the entire universe fundamentally comprised of a matrix of tetrahedrons, even if the underlying geometry must be spherical.
Personally, I can't stop returning to this theory. It perfectly explains wave-particle duality.
Think of it, if you have two tetrahedrons spinning out of phase with one another, they will always collide at one of their faces or vertices. But if you have two tetrahedrons spinning in perfect phase with one another, then they can technically pass right "through" one another by sharing one face for the duration of one spin.
Think of it like me throwing a knife so that it spins while it flies. If you throw a knife at me with the exact same spin, then they will spin past each other and both hit their targets, even if thrown right at each other.
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Anonymous at Tue, 22 Oct 2024 06:16:41 UTC No. 16443698
>misfolded version of an obscure neural protein
>replicates by ruining normal proteins in cells
>highly resistant to damage
>slowly destroys your brain and nervous system
>can catch it from eating meat from a sick animal
Why the fuck do prions exist like this?
🧵 What is dark matter really?
Anonymous at Tue, 22 Oct 2024 05:45:46 UTC No. 16443668
Are the "fields" which material matter usually experiences really just dark matter which interacts with physical matter under a specific set of conditions? For instance magnetic field is measurable only when a particular charge is under some velocity, likewise an electromagnetic wave is only emitted when the said charge is undergoing some acceleration. An electric field is only observable when a dipole is present, and a gravitational field is only calculable when there's some mass to experience it and thereby prove its existence. In all instances, physical matter had to be in a specific set of conditions for the "field" to prove its existence, or more aptly, interact with the matter. Are those "fields" just different types of dark matter? Is there physical matter which is incapable of "stimulating" the dark matter in order to "prove" its existence? Is it plausible to start experimenting with random physical quantities just to see if we discover some new type of field, ultimately reaching closer to our understanding of what dark matter even is?
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Anonymous at Tue, 22 Oct 2024 05:09:17 UTC No. 16443635
Thanks to Sabine Hossenfelder I now understand that theoretical physics is a worthless field for pseudointellectual frauds and that physics students should be spat on
🗑️ 🧵 Nonlinear Nonlocal Analysis Problem
Anonymous at Tue, 22 Oct 2024 05:05:02 UTC No. 16443631
Is there a function [math] g: R -> R [\math] such that [math] g^2=g*g [\math], where * denotes convolution? We can take g to be integrable and bounded. This problem is hard because it’s both nonlinear and non-local. Obvious strategies all fail, with simple inequalities failing to rule out a solution and Fourier transforming getting you back to where you started.
Attempting to do power series or other forms of expansion end poorly because what is well behaved for the square term isn’t for the autoconvolution, and vice versa. Simple inequalities show that no such solution can exist which is supported on (1/e, infinity), even over the shared domain of [math] g^2 [\math] and [math] g*g [\math]. In general, no finite support works because the convolution will double it.
It’s worth noting that a solution to the problem can be horizontally rescaled to a solution for [math] g^2= c g*g [\math]. This isn’t the case if we define the problem over the domain (0,1) and take the convolution to be periodic (modulo 1). In that case, Jensen immediately rules out solutions to [math] g^2= c g*g [\math] unless c>1. Beyond that I have no idea. Another way to solve the problem would be to find a function who is its own Fourier transform, and whose square is its own Fourier transform as well. This is evidently difficult. Any new strategies would be greatly appreciated.
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Anonymous at Tue, 22 Oct 2024 04:28:03 UTC No. 16443588
> images can be expressed as an equation that defines the color of each pixel
> such equation can be compressed into a very small file size or even a single long number
> convert image of cp into equation, number
how would you stop this? you'd have to not only ban those numbers but also every way of expressing and converting them
https://en.wikipedia.org/wiki/Illeg
🧵 Children IQ
Anonymous at Tue, 22 Oct 2024 04:03:16 UTC No. 16443553
Is it true that 10~14 year old girls are smarter than boys? why does this happen? In my school years I noticed that girls were less messy, but I couldn't measure the intelligence issue.
Does this mean that in our 10~14 years old, boys are like Ben Tennyson and his cousin?
🧵 Isn't the asian cold possible?
Anonymous at Tue, 22 Oct 2024 03:37:39 UTC No. 16443524
I actually do catch a cold every time I sleep with the AC on or leave the window open. Isn't it possible that asians as a race simply have their immune systems damaged by having the AC on and so on? Maybe other races just don't have this trait.
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Anonymous at Tue, 22 Oct 2024 03:14:25 UTC No. 16443511
it is impossible to understand human society without reading these 2 books. what are some other books that should be mandatory to read to understand physics, chem, bio, history etc.?
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Anonymous at Tue, 22 Oct 2024 02:41:01 UTC No. 16443496
Is there even a point in measuring your iq?
I graduated top of my class in school (private) and college (top ranked, stem major). My parents are stem academics.
Will knowing my iq somehow change my life? What's even the point?
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Anonymous at Tue, 22 Oct 2024 02:37:07 UTC No. 16443491
I did terribly on a grade 12 chemistry test. Please make fun of me. I feel stupid.
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Anonymous at Tue, 22 Oct 2024 02:36:18 UTC No. 16443488
do you look like a scientist?
🧵 Bio
Anonymous at Tue, 22 Oct 2024 00:09:51 UTC No. 16443350
im going into college soon, and i have to decide on either Environmental earth and ocean science ( geology and Oceanography, i pick which one i want to major in later on) or environmental biology (ecology), does anyone who works in these fields (or any field relating to these) have anything to advice? are these good majors to find jobs or should i bite the bullet and major in regular bio
🧵 Argentina’s researchers face catastrophe under Javier Milei
Anonymous at Tue, 22 Oct 2024 00:05:27 UTC No. 16443347
https://www.chemistryworld.com/news
>The situation facing chemists and other researchers in Argentina is continuing to worsen under the country’s hard right President Javier Milei, who assumed the country’s helm in December. The sharp cuts to higher education, science budgets and professors’ salaries persist, prompting an estimated 1000 academics to take to the streets on 2 October to protest.
>After less than six months in office, Milei had already demoted the country’s science ministry and frozen funding for the National Scientific and Technical Research Council (Conicet), which funds the work of about 12,000 scientists at 300 research institutions. He has also frozen budgets at the country’s public universities that conduct most of the research carried out in the country, at their 2023 levels. And now, less than a year after becoming president, he has drastically reduced funding at public universities, crippling the salaries of professors and staff there.
>‘Salaries have lost about 50% of buying capacity while accumulated inflation is about 144% in one year,’ Alberto Kornblihtt, a molecular biologist and emeritus professor at the University of Buenos Aires, tells Chemistry World. The country’s annual inflation rate has been estimated at nearly 300%.
>In addition, although Argentina’s Congress approved legislation to regulate the budgets of national universities with adjustments that account for inflation for current expenses, as well as salaries, Milei vetoed the measure on the evening of the 2 October demonstrations. On 9 October, Congress upheld Milei’s veto.