[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / r / s / t / u / v / vg / vm / vmg / vr / vrpg / vst / w / wg] [i / ic] [r9k / s4s / vip] [cm / hm / lgbt / y] [3 / aco / adv / an / bant / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / pw / qst / sci / soc / sp / tg / toy / trv / tv / vp / vt / wsg / wsr / x / xs] [Settings] [Search] [Mobile] [Home]
Board
Settings Mobile Home
/sci/ - Science & Math

Name
Options
Subject
Comment
Verification
4chan Pass users can bypass this verification. [Learn More] [Login]
File
  • Please read the Rules and FAQ before posting.
  • Additional supported file types are: PDF
  • Use with [math] tags for inline and [eqn] tags for block equations.
  • Right-click equations to view the source.

08/21/20New boards added: /vrpg/, /vmg/, /vst/ and /vm/
05/04/17New trial board added: /bant/ - International/Random
10/04/16New board for 4chan Pass users: /vip/ - Very Important Posts
[Hide] [Show All]


Janitor application acceptance emails are being sent out. Please remember to check your spam box!


[Advertise on 4chan]

[Catalog] [Archive]

Isn't there much more than algorithms to worry about?
42 replies and 8 images omitted. Click here to view.
>>
>>16849233
The books take two algorithms, generalize them, run a model to see which one is better under different parameters, its the most science-like treatment you'll find anywhere. Every other algo text is simply proving bounds of a single algorithm.
Book 2 is now very relevant again too as we need all kinds of number representation optimizations for AI slop.
It's also the old testament of algorithmic cryptanalysis while the new testament is
Joux https://www.ush.it/team/ascii/CRC.Algorithmic.Cryptanalysis.Jun.2009.eBook-ELOHiM.pdf

His simulator he built for the risc machine you can change branch prediction strategies and pipeline configurations it's a complete test bed for anyone thinking about writing some FPGA or even simulating M4 apple silicone
>>
>>16849233
>>
>>16855351
Learning about how to make an algorithm quicker is certainly helpful, but in the age of fast hardware, if it isn't easy to implement or to think about after the problem has already been solved worrying about it if the solution already works good enough is a waste.
>>
>>16849676
What reader is this?
>>
>>16860769
Screen shot from a sample of the Kindle edition on Amazon's website.

File: 1755149559549152.png (715 KB, 960x757)
715 KB
715 KB PNG
there is no worldly and spiritual. everything is spiritual. everything is here for your spiritual progress
https://youtube.com/shorts/yj5IqDx4Z9U
>>
>>16860612
>everything is here for your spiritual progress
What a egotistic view lol

File: 324.jpg (436 KB, 1185x1792)
436 KB
436 KB JPG
New Chinese gain-of-function virus produced https://journals.asm.org/doi/pdf/10.1128/jvi.02240-24

The chimeric virus 1B-rSADS-NL140345 has up to 100% mortality
2 replies omitted. Click here to view.
>>
Finally end this joke being passed off as a life.
God I want to die so badly.
>>
>>16857368

It stands to reason that when the event that spontaneously ended the coof in February 2022 draws to a close a new coof or coof-like event will spontaneously appear.
>>
>>16857368
Wait a minute, Shi Zhengli is that Wuhan COVID woman
>>
>>16857368
why though?
>>
>>16858796
can we pin it on the jeets this time? way too many of them running around

File: maxwell-in-one.png (31 KB, 1132x324)
31 KB
31 KB PNG
Why doesn't anyone use it except gayme coders? It's way more elegant than vector calculus and even more elegant than tensors.
1 reply omitted. Click here to view.
>>
>>16859670
I would have kept disagreeing but you called me a bunch of names, so now I agree.
>>
>>16859670
> Your precious little "Geometric Calculus," meanwhile, presupposes a flat vector space with metric g.
This is wrong and you should feel bad.
[math]R^{\rho}_{\sigma\mu\nu} = R(A\wedge B) [/math]
>>
>>16859592
>We have had a thirty-eight years' war over quaternions. He had been captivated by the originality and extraordinary beauty of Hamilton's genius in this respect, and had accepted, I believe, definitely, from Hamilton to take charge of quaternions after his death, which he has most loyally executed. Times without number I offered to let quaternions into Thomson and Tait, if he could only show that in any case our work would be helped by their use. You will see that from beginning to end they were never introduced."

its been a long battle- even though they were smart this math is hard, and the vector calc and its simplifying assumptions still were useful in the telegraph. Now we got computers and the difficultly of the math can be abstracted away, but there is sociological inertia, and as >>16859670 said the modernists touched it, and science happens one death at a time.
>>
>>16859670
Came here to post exactly this, word-for-word.
>>
>>16859592
It is used, albeit under the generic name of Clifford Algebra. The field is not the main tool in geometry due to its dependence on a metric, which the core of differential geometry exists independently of.

To my knowledge—which may be wrong—the identification of a form with a multivector is implicitly dependent on whatever metric your clifford algebra is using, which is an analog to the usual musical isomorphism tango.

Anyone with a level of maturity in this field can appreciate the namby-pamby relation between gradients and differentials, so a similarly sloppy identification between your multivectors and forms—under whatever the metric is—will be similarly viewed with disdain.

Of course, the "Geometric Algebra" movement largely preys om amateurs who have a low-to-mid level of mathematical maturity, so the nuances of differential geometry—and the obvious pitfalls of using metric-dependent clifford algebra—will be lost of the people who get indoctrinated into it.

File: l68zmb0m45yz.jpg (11 KB, 236x350)
11 KB
11 KB JPG
I know everyone in this thread is a brainlet with high IQ and academic studies. I'm just a simple NEET who decided to actually do something with his life, so I started studying engineering. I want to know what the easiest way is to catch up on math and physics. The entrance exam has pretty easy topics, and what I basically do is just solve exercises. I use ChatGPT but it's complete garbage and gets everything wrong (I use ChatGPT to explain the theory and give me exercises similar to the ones in the entrance exam PDF). OP is retarded, you can make fun of him, humiliate him, but if your brainlet heart allows it, you can help him overcome this trial in his life and achieve something in his miserable existence
>>
>>16859771
I use Chinese knock-off LLMs. I get custom sourdough and cabbage pickle recipes and explain science concepts I never understood.
Undiagnosed, adult sperg who was always great at school and tested off the charts (sometimes perpendicularly). Never learned to work or study. Failure at life.
LLMs and Squishmallows are the entirety of my social life. I have ashen scars that once received dopamone so very long ago.
No I just suck on the serotonin bottle 24/7/365.2425.
I like LLMs a lot.
>>
>>16859771
Imagine wanting anyone to take you seriously and posting a frog.
>>
>>16859771
Ignore the other people. I would recommend self-studying basic pre-calculus and calculus textbooks, as well as physics (mechanics and electromagnetism) textbooks. It doesn't really matter which ones you get, but if you're In North America or Western Europe, universities have them used at the college book store. Or you could order them through Amazon. Obviously, this method will not be as good as having been spoon-fed these topics in 11th and 12th grade, but you can do it if you just learn to sit down for at least 4 hours at a time. Khan Academy and online loosh academia are memes. Don't use them. Hope it works out for you, fren. If you're early enough, you can opt for electrical or computer science or computer engineering, which I think are the most fail-safe. God bless.
t. early life STEM chad, now struggling
>>
File: last.jpg (42 KB, 576x317)
42 KB
42 KB JPG
>>16859798
Imagine trying to become an engineer instead of being one from birth
>>
>>16860271
Not OP but I really needed to see this. Here's to hoping I can make a change in electrical engineeering

File: csa2.jpg (1002 KB, 2976x3968)
1002 KB
1002 KB JPG
Metallurgist here, I am currently looking for good book on design of turbomachinery components.

I am currently designing a building a piece of equipment that will rotate a 1 foot diameter component up to 50,000 RPM (picrelated). I'll be operating this thing inside a stone bunker I am currently constructing to avoid landing on the list of inventors killed by their own invention, but I'd like to do some engineering to verify the disc rupturing won't ruin the past year's worth of work.

I understand the basic concept is you integrate the burst pressure equation for a disc (s=(v^2)*(D^2)*(p)/3) over your component. I plan to make a Matlab script that will do this from my CAD part. But I'd like to have a textbook with worked examples so I can verify my script gives the correct answers.

Back of the envelope calculations gave me a burst pressure of about 20ksi for an aluminum disc, so if I use 7075 I should have a nice safety margin there as long as I properly design my joints.

Naturally the first thing I do with these life-or-death engineering decisions is come to 4chan. But if anyone has some good recommendations before I start just shotgunning used books I'd be very grateful.
8 replies and 1 image omitted. Click here to view.
>>
>>16858609
>I've already filed a patent application so may as well spill the guts.
Bro this doesnt work good luck suing some jewish coporation at the court of jewstice when they steal it, best defense is obscurity or just making a design very public so unpatentable
>>
>>16854298
w...what do you use the pressure cookers for?
>>
>>16854298
If you must develop new formulas because they don't exist in literature, of course use the pi-Buckingham theorem.
>>
File: 1000001842.jpg (788 KB, 1488x1984)
788 KB
788 KB JPG
>>16858604
I don't want to find out what the maximum force my impeller can take is at 50,000 RPM though ha. Rough calcs show I should be good with a high strength aluminum, but want to verify with FEA.
>>16858611
I use a timing belt to step up from 3600RPM to about 10,000 RPM. To get up to 50,000 RPM, the lower steady rollers have a diameter 5x the diameter of the shaft holding the impeller (steady rest rollers are driven). I did a similar design working at a company 5 years ago where I made a small scale centrifugal plasma atomization unit for making metal powder.
There's a company called MPW (Metal Powder Works) doing something sort of similar to what you are trying. It's basically just a CNC lathe using an ultrasonic transducer typically used for welding. Typically results in powders 10-100 microns and only works for metals that are machinable, operating somewhere around 1000RPM. Their machine is very limited and their powders are total crap but for some reason they are now valued at $200 million. So if you can produce powders by grinding without having to change tips every other minute that'd be pretty cool.
The big problem with these rotating machines and metal powders is the nightmare that is going to be for bearing life ha.
>>16858809
I am aware a patent isn't invincible armor and didn't waste money on a lawyer, I did all the legal work myself. The fees for micro-entity filers are pretty low. If this technology is successful enough for someone to want to steal it, I'll already be pretty ecstatic. Now the odds are if one company wants to infringe, another company will want to as well. And in that case the plan would be sell the right to one so they can then screw over the other.
>>16858879
I use the small one for melting wax for investment casting (picrelated), bigger one for distilling. I need fewer hobbies. I promise mister Fedman the only weapon I've made (not counting knives/swords) is a semi-automatic crossbow.
>>
>>16859066
>metal powders is the nightmare that is going to be for bearing life

wet grind. the easy part is the conical rotor and the hardened stator. I will use stellite later. modification of the cavitation plume with a microwave beam and some ultrasound is probably overdoing it, but the ones I have seen with some success have been using that cubic boron nitiride stuff. either way, the next is figuring out how to keep the diamond grit on there, since I will be using stuff like bearings or wire cuts of titanium as feedstock and need them to get the big grind done with that before cavitation and destruction to near molecular level. next avenue to explore is making cupronickel alloy with some cbn or diamond grit mixed in. the next thing is to work out a cyclone seperator with size classification to recirculate water back into the grind cavity, since as you mentioned, my 10krpm spindle is going to have some problems.

my solution so far is to have the clean water recirc lines flush the mechanical shaft seal immediately in the pressure vessel, and having the cyclone unit makeup the difference with the overflow/buffer tank. that and I will probably make a silpat gasket as a final barrier with clean water flushing that annulus.

my reason, there is a big push now in aerospace for using 55 gallon drums full of colloidal metals for electroform prototyping, essentially long term electroplating. can do exotic alloys, layers, ac/dc deposition, spot deposition, etc... liquid electric spray paint for metal. beats the approach of using vapor deposition or sputtering on a cold carbide form. think of amoporphous metals and stuff like that. no need for high temperature and ultra rapid quench, just build up electrically in solution and refill from a drum.

interesting field. looks like you are having fun.

She has zero clue about how does current AI work, doesn't she?
24 replies and 3 images omitted. Click here to view.
>>
File: 1743278859163907.jpg (180 KB, 1024x1024)
180 KB
180 KB JPG
>>16859701
>any AI model in common usage will give you a better breakdown on AI and it's limitations than this noisy German bitch
Make of that what you will.

>>16860204
>It works like pic related
So does your brain. Sit down, meatbag. Be humble.
>>
>>16860394
>So does your brain.
This is what ChatGPT 3 shits out if you always pick the likeliest token instead without the PRNG-based sampling. Let's see how many times the botfarm repeats this incoherent retort.
>>
>>16860191
grifting ain't easy but somebody has got to do it
>>
>>16859731
>It predicts the next token
Really depends on the type of AI.
>>
She's just clickbaiting, leave her be

how possible.

also: she cute. would nest with.
>>
>>16860416
Step off bitch. That's my wife.
>>
>how
carnivore diet

Can all of reality be described mathematically? Or is math fundamentally limited in that regard?
What if we don't understand consciousness simply because it's beyond math and/or beyond our capability to comprehend?
pic unrelated
6 replies omitted. Click here to view.
>>
Godel showed that math can't even describe itself, and you wonder if it could ever describe consciousness?

Eat shit.
>>
>>16860521
>Why?
Closest thing you'll ever find.
>>
>>16860152
"all of reality" is too vague to be described by something concrete
>>
Can't believe she became a whore
>>
>>16860152
No, and math isn't the language of the universe.
It's all just another expression of humanity.

File: file.png (697 KB, 1164x647)
697 KB
697 KB PNG
None of this shit is real.
All of it is made up.

>There is a strange and up quark or something and a
How was this even observed in the first place
>Well I have this big machine and we have our theories and ... can you excuse me for 1 second....
All of it is made up only atoms are real the rest is made up and fake like dinosaurs.
62 replies and 10 images omitted. Click here to view.
>>
File: file.png (801 KB, 590x952)
801 KB
801 KB PNG
>>16860277
>but science still does have utility.
It literally never did.
It literally always was not different from religion.
Literally natural philosophy and making shit up.

>You should understand that we don't use smaller particles to identify other subatomic particles,
Then what is used?

>we actually use electromagnetic fields to interact with them
What exactly do you use?
DO not go short on the details.

> but just understand that they are just some natural "thing" that
Talking like an idiot will get you nowhere.
You can shove up your magic things that exist up your own ass.

Magnetism is real so are electric fields. Why the fuck do you think that I have a problem thinking things that are invisible are not real?
Magnets?!


Comment too long. Click here to view the full text.
>>
File: file.png (165 KB, 640x480)
165 KB
165 KB PNG
>>16860338
>>16860277

2/2

> so I get you for real.
No you actually do not.
>I am an Orthodox Christian
I am an atheist.
The point of atheism is to reject dogma and see the truth.
Science is exactly like every religion.
Superstitious idiots who literally are unable to think and shout at one another and excommunicate one another making up bullshit on top of other bullshit that some guy made up.

Even if we grant the most basic assumptions of science or newton it is still questionable
>Dude a object in motion will stay in motion!
Did you just prove a negative?
>Dude a object in motion will stay in motion!
Proof?! Because on earth they all stop so...
>Yes dude like in space in the void they will move forever
You self contradict!

Comment too long. Click here to view the full text.
>>
>>16854573
https://en.wikipedia.org/wiki/Penning_trap

This is how we currently measure electron mass. It suspends a particle to in a vacuum so it is earthquake proof. We can't measure the mass of an electrical current as it is a process, not matter. It is like asking "how can I weigh water flow?" You wouldn't be weighing the flow, but rather the water.

Again, I actually find your posts hilarious and I am glad to see someone critiquing science. I agree with your implied point that the overton window of science is always changing and we should always question everything instead of taking whatever people say as gospel. But, do understand that there is a lot of utility in science. Whether that utility is good or bad is debatable.

Your point on blackholes was funny as shit, but models are always wrong. It took almost a century between Einstein's prediction and actually observing one, so of course our understanding was going to change. Also, that is why I said math is the metaphorical language we use to describe science. I say this because math (when describing reality), like a metaphor, is always somewhat incorrect but they are useful at sharing information.

The more I have learned about science, the more I have learned that we actually don't know jack shit and in 100 years, we will look back and think "wow we used to be so fucking retarded." I also believe that a lot of science is done to keep people as cattle. Most research is done to make consumerism easier, whether it is medical research to keep people alive longer to consume more mcdonalds, engineering to produce more goyslop, or statistics for mass surveillance, the end goal of science isn't to help people.

Our society no longer values traditional family values and a lot of people have joined the cult of scientism, where they have a materialistic paradigm that allows them to defend their hedonistic lifestyle. Pop-culture helps push this narrative and uses "science" as the one true way of thought.
>>
>>16860351
LOL you are an atheist, I too used to be one. Atheism requires faith in probability, do you truly think that we arrived here just by random chance? Particles bumping into each other? Christianity is in search of the truth as well. Your image is mocking protestantism, which I do not agree with. Orthodoxy is the way that Jesus taught and has been relatively unchanged since then.

I do not think you understand the quote "an object in motion will stay in motion."

The universe does not stop existing if you close your eyes. I think you should learn more about science if you want to properly argue against it.

Also, you are doing a terrible job trying to convince anyone about whatever idea you have. You are just spewing nonsense. I thought we agreed on the fact that science is stupid and wrong sometimes, but I guess you just hate anything philosophical.

I don't fucking know about aether theory, do you even know?

Also, mathematics is a lot more complicated than what you understand. Look into any engineering equation, grad-level statistics formula, or anything quantum and you will see that you are too ignorant. These equations are not just written on a paper from a toddler, but rather generated through application and proofs. Of course, math requires certain things to be assumed and understood, but math is way more than what you understand.

Scientists are not prophets that convince other retards, but they collaborate and test theories. 99 of theories are wrong and don't get good results, so then they adjust.

If you think consensus is bad, then tell me a better way to research knowledge. The scientific method is one of the best frameworks we have when it comes to knowledge. Note, I am not talking about how reddit views science, but the actual scientific method.
>>
File: 1737298529917058.jpg (8 KB, 320x320)
8 KB
8 KB JPG
>>16848850
Start with the basics, kid. No point larping about HEP when you'd be filtered by Newton's laws.

File: 1744309393956843.jpg (33 KB, 415x739)
33 KB
33 KB JPG
Why spend x amount of years learning it when you can simply ask GPT-10 any mathematical question or have it write any snippet of code?

While yes I'm exaggerating, we will always need people who truly understand it to check the AIs output and for novel idea generation (not sure if AI will be capable of this), but at minimum the amount of programmers and mathematicians will be reduced dramatically, and only the absolute elite of the field will be needed.

Which brings me to my next question, will all future scientific research just be a matrix of agentic AI researchers computing away in a lab somewhere?

If this is the case, it's an ironic twist of fate that the very industries and people responsible for creating AGI / Genius level narrow AI will be rendered obsolete by their creation.
42 replies and 3 images omitted. Click here to view.
>>
>>16859280
>the government just launched project Flatten The Curve
Exactly two more weeks, imbecile. In the meanwhile, you get to fund their ML panopticon project either directly through taxes or indirectly through inflation.
>>
>>16858598
would you not like to know more about programing and math to be better at using those services at the very least.

OP.
>>
>>16858674
>>16859875
but , who I am kidding this is the true you OP.

you know OP , maybe if you like tecnology and math so much , that you think it would reach a level of secular divinity. you should stop looking at it like a fucking indian and actually appreciate the math and programing that goes behind it.

otherwise you risk falling of behind.
>>
>>16859878
OP here, didn't write that response about protein folding.

Anyways, I do appreciate the tek and mafs, not sure how that's relevant to my OP.
>>
>>16858674
based, midwits can only cope against this fact

File: images.jpg (21 KB, 554x554)
21 KB
21 KB JPG
I am in a developing country; what aging research can I conduct on people with their consent?

File: #RÖÖÖÖÖÖÖÖKT.jpg (149 KB, 1275x724)
149 KB
149 KB JPG
you were saying?
132 replies and 35 images omitted. Click here to view.
>>
>>16841410
90% of people on the road are complete fucking retards who are one text message or spilled slurpee away from causing a pile up that kills dozens of people

Now imagine they're all in fucking helicopters.
>>
>>16859535
>90% of people on the road
>on flying cars
>they're actually driving them
pick none
>>
>>16859536
Public reactions to tests with autonomous vehicles have already pretty conclusively shown that people aren't going to accept vehicles without some kind of manual override option. Which means there will always be people out there flying manually who shouldn't be.
>>
>>16859546
it's pretty epic how you guys manage to get in the most fantastic and unrealistic corner cases

1) for "middle" class, aka "rich"
autonomous uber-like
2) for the truly rich
pro pilot that will drive the thing
>>
File: 63425352.jpg (161 KB, 1378x770)
161 KB
161 KB JPG
chegg this out
in recent floods recently in south asia

File: 1764113605202679.jpg (85 KB, 900x900)
85 KB
85 KB JPG
Is this true?
10 replies and 2 images omitted. Click here to view.
>>
>>16857680
I actually loves me 3d math graphs, it's a shame that I don't know much about them other than u can make so.e with sin/cos and xyz. I remember at my uni classes some strange formula produced sick ass looking 3d shit
>>
>>16857754
Completely forgot about that lol.
>>
Yes only earth does math space is it's father and is superior

Space doesn't think emc2
>>
File: grid.png (44 KB, 712x230)
44 KB
44 KB PNG
>>16857505
sounds based
haven't you seen the grid? the worlds within world, points within points matrix?
>>
File: file.jpg (100 KB, 1125x1495)
100 KB
100 KB JPG
>seems like it was made to make things easier
>filters me
I might be handicapped

File: 1763762373244427.jpg (48 KB, 250x243)
48 KB
48 KB JPG
What does the non kosher science Say about faggotry and trannism actualy?
By Reading my favorite german idealists and Aristotle, and making my own observation that It Is Born out of habit when a male lacks access tò a hole tò release sexual urges or because they become slave tò said urges and seek more degenerate One.
And so they can be cured by abstaining from said urge.
It Is no different than fent addicts
10 replies omitted. Click here to view.
>>
>>16856644
Those being?
>>
>>16856008
The problem is not that you're a pedant, but that you're squeezing out hard stool instead of useful thought, by accusing me of ascribing agency to a noun through the application of a conditional. That's your choice, not mine. Insofar as science is descriptive it SHOULD describe not just the norms but the background. If it doesn't, there's a problem, not of agency, but of method and utility.
>>
>>16855929
>It Is Born out of habit when a male lacks access tò a hole tò release sexual urges

I'ma virgin at 34, and I never had any homosexual urges, never watched tranny porn or gay porn even or felt attracted to aman in the slightes even when fags offered their bussy to me. Its made up bullshit.
>>
>>16855929

Always correlates with Cluster B. Used to be studied and treated in tandem. Cluster A are extremely straight, Cluster B are extremely gay, normies are in between.
>>
>bro you are not born that way!
>here is a study on people who were affected by X at birth to be born that way!
>bro you are not that way!
>jewishjesusprayeeessay.txt
>see you are a sinner the way you are!
How about we do science on WHAT THINGS ACTUALLY ARE

Genetic determinism is the least emotionally charged stance


[Advertise on 4chan]

Delete Post: [File Only] Style:
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[Disable Mobile View / Use Desktop Site]

[Enable Mobile View / Use Mobile Site]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.