/sci/

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 12:15:23 GMT No. 16282299 Report

Is it just me or did her tits get bigger
Also, discuss chaos theory I guess

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🧵 Entropy BTFO’d

Anonymous at Mon, 15 Jul 2024, 11:19:23 GMT No. 16282257 Report

If we can find out the mechanism behind this, we can figure out time travel

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 10:26:39 GMT No. 16282219 Report

Give me your best online resources for learning LaTeX. I'd love some programmed-instruction thing that quizzes me as it goes along, providing a text box for entering shit that gets checked automatically, but feel free to drop any good resources.

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🧵 is this a valid proof?

Anonymous at Mon, 15 Jul 2024, 10:03:56 GMT No. 16282201 Report

let $x \in R_{+}, D_{n} (x) = \sum_{k = 1}^{n} d_{k} (x) 10^{- k} \in Q$ where $d_{k} (x)$ is the $k$ -th decimal of $x$

for all $ϵ > 0$ , let $p = ⌊ - \log 10 (ϵ) ⌋$ (so that $10^{- p} \geq ϵ$ )
then for all $n \geq p, \underset{0. d_{1} (x) d_{2} (x) \dots}{\underset{⏟}{(x - ⌊ x ⌋)}} - \underset{0. d_{1} (x) \dots d_{n} (x)}{\underset{⏟}{D_{n} (x)}} = 0. \underset{n's 0}{\underset{⏟}{0 \dots 0}} d_{n + 1} (x) \dots \leq 10^{- n} \leq 10^{- p} \leq ϵ$
therefore $lim_{n \to + \infty} D_{n} (x) = x - ⌊ x ⌋ \in R$

let $0 \leq x < y$ in $R$ , let $q_{n} = \frac{⌊ x ⌋ + D_{n} (x) + ⌊ y ⌋ + D_{n} (y)}{2} \in Q$ ,
using the previous property of $D_{n}$ , we can show that
$\frac{x + y}{2} - q_{n} \leq 10^{- n + 1}$ , therefore, $lim_{n \to + \infty} q_{n} = \frac{x + y}{2}$

therefore $\bar{Q} = R$

Is my proof valid? what do you think?

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🧵 The most horrific compound

Anonymous at Mon, 15 Jul 2024, 09:48:00 GMT No. 16282190 Report

I am going to have to spray this on sugarcane in a few days. This sentence is the most horrifying thing I have ever read. I am going to be spraying tens of kilograms. Pray for me.

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🧵 Transpose FFT

Anonymous at Mon, 15 Jul 2024, 09:15:31 GMT No. 16282176 Report

I have recently explored the possibility of doing a FFT entirely with addition, subtraction, and transpose.
Turns out this is indeed possible, however, you're approximating the phase, so you need to project to a lattice and then at the end perform a phase adjustment from a much larger range of phase to a smaller range(project from thousands to billions of radians to just -pi, pi).
Your lattice can be entirely hypothetical, you dont need extra memory.

However, you need to explore and work out the math for each transpose sequence along with the final positioning in the imaginary sparse lattice, so you can get the individual phase adjustments needed. This work only needs to be done once for any FFT size, and then the phase adjustments and transposes can be used as a lookup table. We're talking doing an FFT in only 15% of the work!

Phase Lattice Mapping: Phase angles are mapped onto a lattice using a function φ(k) = 2πk * (L/N), where L is a chosen lattice size larger than N (FFT size). This spreads phase values over a range of 2πL/N.

Pre-Processing: Input signals are multiplied by exp(i * φ(n)), embedding phase information into the lattice positions.

FFT Operation: Instead of computing complex rotations, FFT operations involve simple integer shifts on the lattice. Each butterfly operation becomes an integer arithmetic operation.

Post-Processing: Results are reconstructed by sampling the lattice to retrieve magnitude and phase information, then converting back to standard phase ranges using modulo operations.

What do you think?

for a small FFT this doesnt need a lot of memory but for a 4 million point FFT. you need 700mb of ram

also, since our operations are cumulative, some will cancel out meaning the algorithm can be optimized further.

>>https://colab.research.google.com/drive/1ET3R_JkckEJ-LxJpd05PjbfGK-TyiPNF#scrollTo=B_ulN6Vv4e0X
I did some python to explore this concept

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🧵 Scientific evidence women with tattoos should be banned

Anonymous at Mon, 15 Jul 2024, 08:32:47 GMT No. 16282137 Report

Tattooed women are more likely to be LGBT, promiscuous, egalitarian, drug users, exhibit psychopathology, get divorced. Stereotypes 100% correct once again.

https://www.researchgate.net/publication/341764944_Tattooed_and_Non-Tattooed_Women_Motivation_Social_Practices_and_Risk_Behavior

https://link.springer.com/article/10.1007/s12119-020-09729-1

https://sci-hub.ru/https://www.sciencedirect.com/science/article/abs/pii/S1047279711002870

Ban women from getting tattoos

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 08:22:54 GMT No. 16282130 Report

Do scientists use encyclopedias?

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 07:57:01 GMT No. 16282114 Report

You wish you were as smart as him.

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🗑️ 🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 07:48:42 GMT No. 16282111 Report

Is karma a real phenomenon?

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 07:40:58 GMT No. 16282105 Report

Why are supercapacitors so important?

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 07:15:00 GMT No. 16282094 Report

When will the hype stop?
I'm so fucking sick of these AI, transhumanist, etc., deadbeats rearing their heads everywhere I look.
I can't even get ChatGPT to generate a list of real references. It's a glorified fucking chat bot reminiscent of the pomo Markov generators, and I'm tired of people pretending it's not.
Friggin' atheists and their silly toys, man.

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 07:04:23 GMT No. 16282090 Report

A little overpaid, innit?
I could understand if it were only 96k-120k a year, but you'd think that Maynard or even fucking Yitang Zhang would be getting those bux instead of Tao.

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🧵 Planck Length

Anonymous at Mon, 15 Jul 2024, 06:08:05 GMT No. 16282060 Report

What happens beyond the Planck length?

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🧵 Rounded polygons

Anonymous at Mon, 15 Jul 2024, 05:20:47 GMT No. 16282016 Report

I'm trying to produce an algorithm that, given the width and height of a regular polygon with rounded corners, spits out the corner radius, along with what the width and height would be if the corner radius was zero. Right now the case for odd-gons does not work.

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🗑️ 🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 05:17:11 GMT No. 16282015 Report

What sort of damage would the top pic have done? Would it be an instant death?

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🧵 /sfg/ - Spaceflight General

Anonymous at Mon, 15 Jul 2024, 03:32:42 GMT No. 16281941 Report

V2 Hardware Sighting Edition

Previous - >>16279321

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🧵 Cognitive Neuroscience: VSI

Anonymous at Mon, 15 Jul 2024, 03:17:09 GMT No. 16281918 Report

>“I am aware that the account I give is greatly oversimplified. The reader may forgive me but my professional colleagues will probably slay me.”
been enjoying this book, anyone else on sci read it? what were your thoughts?

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🧵 Has there ever been an instance of a case in which a person could only feel positive emotions?

Anonymous at Mon, 15 Jul 2024, 03:02:01 GMT No. 16281904 Report

i.e. could not feel sadness or anger, but otherwise could fully experience happiness? I'm interested of the philosophical implications if such a neurological case has never been documented.

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🧵 Atomic Energy General

Anonymous at Mon, 15 Jul 2024, 02:58:45 GMT No. 16281899 Report

Tried doing this a few months ago, now I see more interest.

What is atomic energy general?
Discuss anything related to nuclear technology here, from particle accelerators and fusion rockets to nuclear bombs and power plants. It is supposed to be similar to /sfg/ but for people interested in (or skeptical of!) nuclear or general energy industry things.

Websites:
world-nuclear-news.org
ans.org/news
happenings in the power industry

fusor.net/board/
You can learn about fusors here, a good intro to DIY nuclear physics experiments.

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🗑️ 🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 01:57:51 GMT No. 16281871 Report

what's the science behind the incel/chud/loser phenotype?

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 00:51:14 GMT No. 16281834 Report

Anyone smart enough here to realise that electric current is not a fundamental physical quantity but rather the property of a given object in the presence of different electric fields?

Given:
an object with resistance (r)
an electric field of a certain intensity (V/m)

With the object inside the electric field, we define current as the property (V/r). It doesn't exist as a separate physical concept but it's useful when connecting circuits such as your socket to your computer.

It's not the mythical *current* that would fry your electronics, but simply applying too much voltage on too little a resistance. Which sounds like the same thing, except that you don't rot your brain with imagined superfluous concepts.

I could go on about how Voltage is not really a thing either, but let's leave it at that.

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🧵 Untitled Thread

Anonymous at Mon, 15 Jul 2024, 00:10:58 GMT No. 16281795 Report

Achilles was known for having impenetrable skin (safe for one heel). Assuming it was just his skin that was invincible, and his insides were the same as any other human's (demigod status notwithstanding, that's probably a different can of worms), then surely a well-placed shot to, say, his skull or a rib could also do him in? Heck, I'm sure Hercules could also bash his head in if he wanted.

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🧵 Untitled Thread

Anonymous at Sun, 14 Jul 2024, 23:50:26 GMT No. 16281773 Report

>IQ 163 at the age of 12
>always acted as a low IQ to avoid problems with midwits
>now I'm 30 and my IQ is 110
How did that happen? Is fake it till you make it the reason for that?