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/sci/ - Science & Math


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9455232 No.9455232 [Reply] [Original] [archived.moe]

Do you think the mistery behind our consciousness is linked to what's happening after death?

>> No.9455247

>>9455232
No.
Consciousness is a process being carried out by brain cells. "Thinking" is a verb, not a noun you can point to.
There was a thread yesterday asking if Steven Hawking was right in his opinion there was nothing after death, any more than an unplugged computer could continue to function. No hardware, no consciousness.
Thread degenerated into theology at that point.
"Belief" vs. "evidence".

Interesting GIF though. Poser?

>> No.9455261

>>9455232
As a christian id say most definitely. The day will come when we rise again and there will be a new kingdom on earth. Consciousness is the key to this transitions.

>> No.9455262

>>9455232
As a christian id say most definitely. The day will come when we rise again and there will be a new kingdom on earth. Consciousness is the key to this transition.



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9455227 No.9455227 [Reply] [Original] [archived.moe]

Hey guys

I am an Ukrainian schoolboy and recently moved on to studying algebra.

In parallel with the lessons at school, I try to read the English literature on mathematics in order to understand the meaning of the relevant terms and not to get confused in them in the future.

Please, tell me some literature and problem books for my level (7-8th grades)



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9455219 No.9455219 [Reply] [Original] [archived.moe]

>there are people on this board RIGHT NOW that are too stupid to understand how map projections work
Is that why so many idiots think its flat?
https://en.wikipedia.org/wiki/Map_projection

>> No.9455258

It should be illegal to be this autistic.



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9455206 No.9455206 [Reply] [Original] [archived.moe]

What does /sci/ think of pic related? Is it a science? Regardless, is it worth learning?

>> No.9455234

>>9455206
it's an extremely weird area of mathematics.

>> No.9455243

It's actual Math, first discussed by John Nash.
Very interesting but sadly my courses on the matter didn't go into depth so I can't tell u very much about it

>> No.9455276

>>9455243
John nash didnt first discuss it. Its quite old. I swear even neumann discussed it.



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9455177 No.9455177 [Reply] [Original] [archived.moe]

>go to an american university for a graduate program
>everyone uses huge fucking yellow pencils to do math and not pens

WHAT THE FUCK IS WRONG WITH YOU PEOPLE

5 replies omitted. Click Reply to view.
>> No.9455226

>>9455186

I actually go to Stanford and Americans here use pencils, nonamericans use pens.

>> No.9455228

>>9455226
I'm not an Amerilard
>>9455212
Physics

>> No.9455236

>>9455177
>giving a shit what someone's writing preference is

I guess I like to doodle a lot during lectures so I use pencil

>> No.9455241

In America our pencils are safe, they're made with graphite, not actual lead. I'm sure where you're from people use actual lead pencils. It's safe now OP, you can use them.

>> No.9455244

What happens when you need to draw a graph or diagram and apply different levels of shading? You should have at least your 2B, your 4B and HB pencils on hand.



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9455155 No.9455155 [Reply] [Original] [archived.moe]

Why do we obsess so much about this piece of shit rock

There's nothing there

>> No.9455173

>There's nothing there

Citation?

>> No.9455196

>>9455173
This. Mars still has a semi-molten core, meaning that if you go down far enough, temperatures will be favorable for life. Combine that with the fact that it used to be covered with water and it seems likely that there's probably some underground caverns on Mars with water and microorganisms in them.

>> No.9455281

lots of fe



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9455128 No.9455128 [Reply] [Original] [archived.moe]

>be me
>in 3rd year software eng class on functional programming
>learning recursion for the millionth time

should i drop out anons? i have learned more about programming from youtube tutorials

>> No.9455130

>>9455128
NO
Only drop out if you have a high paying job developing, otherwise get that piece of paper no matter how ridiculous the classes may seem



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9455102 No.9455102 [Reply] [Original] [archived.moe]

Hi /sci/. I'm developing robust acausal trades for minimally violent first contact with extraterrestrial alien races. I've been able to successfully deescalate in most situations, but I'm starting to run into a particular recursive problem.

Supposing that you can demonstrate that there's a tactical need for every sovereign species to be able use everything short of it, is there any reason we shouldn't also assume that any given entity, faction, or polity shouldn't also be able to use the universe as a weapon against itself? That is to say, if you can use everything short of the universe as a weapon to defend yourself from the entire universe, is there any moral, logical, rational, tactical, or metaphysical reason that you shouldn't just be able to make the leap to using the entire universe as a weapon against itself?

If you need any background or context I can explain it. You can assume that any hypothetical faction that opposes your argument would at the very least be able to fully understand it.

4 replies omitted. Click Reply to view.
>> No.9455124

>>9455102
If everything "short of" the universe is already contained within the universe, then aren't those already examples of the universe being used as a weapon / defense against itself? There wouldn't really be a "leap" to begin with.

But really wtf are you talking about

>> No.9455141

>>9455124
No civilization is "born" with hyperweapons. It takes every civilization a long time to reach the level of technology where they can realistically have a weapon that destroy planets. Asteroid colonies are far easier to destroy in comparison; ordinary sabotage of vital life systems works fine.

The thing is, it's hard to "hide" the potential danger of any weapons you develop. At some point in megascale engineering, it becomes impossible to "hide" your intent without equally monumental cloaking technology. There is no default universal authority for any civilization to have right to claim any kind of physical or tactical advantage over any other. Without an inter-civilization contract, everyone has every right to suspect every activity of every other civilization. Thus, because of either physical or distance limitations, certain scales of weaponry aren't possible without interplanetary cooperation. There's no "galactic destroyer," even if you can weaponize black holes. You have to manually go around destroying each civilization in turn, at which point you've lost any capacity to hide what you're doing.

It's a huge metatactical hypothetical game, and every space-faring civilization is a player. The "right" to use any scale of weaponry is the key factor in obtaining any dominion beyond your home world.

>> No.9455175

It is 2018 check your time travel shit

>> No.9455213

>>9455175
The only thing time travel really changes as far as I've found is the nature of universal consensus on the value of predictive technology. In models where time travel is possible, time traveling factions outpace and merge with predictive technologies far faster than "traditionalist" factions. All it really does on a political level is normalize embedded exofactions permanently.

It also allows for tricky things like universal and even multiversal authorities to form, but the non-interventionist parameters hold, for the most part. Eventually every civilization reaches a stable point of peace from which acausal negotiations can be mounted. Peace, you could say, is the only unavoidable outcome.

>> No.9455268

>>9455102
Hi / sci /。我正在開發強大的因果交易,與外星人首次接觸外星人最低限度的暴力。我已經能夠在大多數情況下成功排除,但是我開始遇到一個特定的遞歸問題。

假設你可以證明每一個主權物種的戰術需要都能夠利用一切事物,那麼是否有任何理由我們不應該假設任何特定的實體,派別或政體都不應該也能夠使用宇宙是對自己的武器?也就是說,如果你可以用宇宙中的一切東西作為武器來保衛自己,那麼是否有道德,邏輯,理性,戰術或形而上學的理由,你不應該能夠跳躍使用整個宇宙作為對自己的武器?

如果您需要任何背景或環境,我可以解釋它。你可以假設任何反對你的論點的假設派別至少能夠完全理解它。



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9455097 No.9455097 [Reply] [Original] [archived.moe]

mine just does whatever the fuck it wants to

>> No.9455105

>>9455097
>doesn't train their printer
>complains when it doesn't listen
Bad parenting.

>> No.9455108

>>9455097
Yes. Thy have more free will than some posters on this website I might add

>> No.9455113

>>9455105
>train their printer
Made me wonder - could you devise a printer that would be run by a neural net? Or would it be infeasible power-wise.

Would be funny to have an actual learning printer that you can program to learn from getting yelled at and smacked.



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9455085 No.9455085 [Reply] [Original] [archived.moe]

hey guys, chemistry brainlet here. Does this molecule mean anything?

>> No.9455198

Use Chemspider



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9454937 No.9454937 [Reply] [Original] [archived.moe]

Help me understand how Bragg's Law works.

What I don't understand is how interference works. Every single explanation out there says that the two incoming X-Ray beams are reflected from the crystal planes and there are the two outgoing beams and *BOOM MAGIC* they interfere and they add up. But why? Literally every diagram like pic related only shows the two leaving beams parallel to each other and not interfering at all. Wtf is going on here?

Is it even real interference or is it just that many parallel beams have a more intense mark in the detector/on the film?

For interference to happen, shouldn't the two (or more) outgoing beams be not only parallel but actually in line?

What am I missing?

12 replies omitted. Click Reply to view.
>> No.9455230

>>9455136
Two light rays pass right through each other and go their separate ways. But at the intersection, the electric field is the sum of the electric fields of the individual rays. The photons die and their energy is absorbed when they hit a surface. If the intersection point occurs AT the point of contact, the electric field may be stronger or weaker than the field of an individual photon. So you get brighter and dimmer areas,
Note that a localized cancellation does not mean that energy has been destroyed. It just shows up at one of the extra-bright areas. Interference does not change the total energy.

Seems to be something wrong with 4Chan today. Can't upload images.

>> No.9455242

>>9454937
Do you understand how young's interference experiment works, and the math that describes it? It's basically just that.

>> No.9455253

>>9454937
Does this help? Won't let me upload pictures
https://chem.libretexts.org/@api/deki/files/12295/Bragg'sLaw.jpg?revision=1&size=bestfit&width=444&height=236

>> No.9455254

>>9455210
>You get a geometric pattern of light and dark spots
But the X ray detector is positioned where the brightest spot is then, right?

>>9455242
Yeah, I guess it is. It's still kinda weird that nowhere did I read that it's similar to the double slit experiment or diffraction grating.

So in essence, what we really get is pic related (sort of), but we are only interested in the angle that corresponds to the "central bright fringe"?

>> No.9455266

>>9455254
They look at the entire pattern to determine the angles. Of course, that's when they used film. Maybe they scan the detector and measure one pixel at a time these days. But you need the whole thing.
Damn, I wish I could upload an image.
Think of the two-slit experiment. The spot directly between the 2 slits is bright. Because it's an equal distance from slit A and slit B. The waves travel the same distance, so they arrive in synch and reinforce. A little to one side they're out of phase and the screen is dark. A little further and the path difference is exactly one wavelength, so they reinforce again. Dark. Bright when the path lengths differ by two wavelengths, and so on.
From the wavelength of the light and the spacing of the dark lines on the screen you can calculate the distance between the slits. Follow?
Each successive peak corresponds to the next angle at which the difference in path-lengths between slit A and slit B is an integer multiple of the wavelength.
In Bragg diffraction you are calculating the equivalent of spacing between slits -- the spacing between atoms in the crystal. .



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9454556 No.9454556 [DELETED]  [Reply] [Original] [archived.moe]

What is a degree that actually pays well? Don't wanna go with some meme tier degree that is only capable of landing me a job at subway.

15 replies omitted. Click Reply to view.
>> No.9455112

>>9454556
I am currently in Mechanical engineer 1st year 1st semester so far so good a bit boring but mechanical engineering is such a broad degree that you are almost guaranteed to land a more than decent paying job, and it has been required by the market as soon as it was created,imo.

>> No.9455154

>>9454595
I agree with this, but you really need to love the subject matter in order to stay enthusiastic throughout undergrad in order to be accepted to a top 50 US med school, and then to stay motivated throughout med school and residency. That being said, medicine is so broad nowadays that it honestly is not that difficult to find a field you are thrilled about. You get the meme idealists (i.e. "we need to save all the lives we can" or "medicine is a right" bullshit), skilled hands-on craftsman who go into surgery, and others who end up in the pharm/managerial/executive end. There are many more beyond that, but hopefully that gives you some idea. I elaborated a bit because I started off college wanting nothing to do with medicine since I thought the field was somewhat isolated to the meme idealists, but was later exposed to the latter two, of which I really enjoy the prospective career of. Currently a M2 at a pretty good med school.

>> No.9455159

>>9455112
Thanks for giving us all advice Mr. College Freshman, but I'm an actual mechanical engineering graduate and I can tell you with a great deal of certainty that there are no jobs and that you've been lied to. Of course this is the part where you try to say it was my fault for being subpar, but no: everyone in my graduating class at a high-tier state university is in the same boat. Best case scenario you get a job paying $50k a year working on air conditioners.

>> No.9455162

>college is about education

Only a little bit. 85% of college is showing your future employers you were able to commit to something for several years and finish in good standing.

>> No.9455165

>muh high-paying degree!

Fools. The lot of ya. If you don't have connections, you're fucked. "It's not what you know, it's who you know," is perhaps the most prescient advice I could give to any young adult. It really doesn't matter what your degree says.



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9454544 No.9454544 [Reply] [Original] [archived.moe]

If humanity manages to irreversibly fuck up Earth's climate, will we finally get our shit together and expand outward? Would this not be a preferable long-term solution to dying out in some paleo-hippie hedonist commune?

I say let it all burn.

11 replies omitted. Click Reply to view.
>> No.9454627

>>9454607
>eco techs
the technologiess you need to do macroscopic geoengineering are not the same that you need to create closed-cycle habitation in space. There might be overlap, but you won't develop it without actually doing it for the explicit purpose of space habitation.

And ultimately, I didn't ask whether you think it's possible to irreversibly fuck over Earth. I asked if you think being kicked off the planet by our own stupidity could prove a benefit in the long term.
>muh /pol/
get a life
>>9454616
But if you can sustain life in inhospitable environments, you can sustain millions of times more of it in the solar system. Why stick to this shitty fucking dustball? Why is investing all our shit into half assed containment measures and throttled back frugality preferable to kicking our dependency on this single tiny body?

>> No.9454660

>>9454627
We would have to set up sustainable environments prior to the Earth getting fucked up not during times of desperation. It would take thousands of years to make another planet livable and I think that most people feel no need to expand out. There's no real benefit in colonizing another planet and the only reason is fueled by fear.

If the Earth ever does get to the point where humans have to live in some kind of artificial life support containment dome, or whatever the fuck, I'm pretty sure that we would put all our efforts into being able to live the natural environment once more. Although it may not seem like it, humans aren't so irresponsible that they would just let the place they have been living in for the past thousands of years to become unlivable.

>> No.9454666

>>9454593
Humans won't be able to get off if fuck things up that badly

>> No.9454734

>>9454544
>irreversibly fuck up Earth's climate

Can't happen. Humanity is too disorganized to get its shit together to do something to that degree.

>get our shit together and expand outward

Some are trying right now to do that. You don't need much of a reason to do so if you have the money to do it and don't mind "wasting" money.

>Would this not be a preferable long-term solution to dying out in some paleo-hippie hedonist commune?

Do both.

>> No.9455031

>>9454544
>If humanity manages to irreversibly fuck up Earth's climate

Please be so kind as to tell what is the "correct" earth climate... the global ice ball it has been several times, the hot house of no surface ice it has been several times. We are now in an inter glacial period of an ice age. What climate is the "correct" climate?



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9454507 No.9454507 [Reply] [Original] [archived.moe]

>tfw the soy meme is real

https://theconversation.com/the-y-chromosome-is-disappearing-so-what-will-happen-to-men-90125

>> No.9455068

Actually, the rate of Y-chromosome degeneration is a lot lower than it originally was. At a time it was losing 4.6 genes per million years, but over the last 7 or so million years the human Y chromosome hasn't lost any genes.

>> No.9455094

>>9454507
>I don't know how genetics works.
happens to lots of people
>I also linked an article I clearly haven't read in full.
great

>> No.9455157

>theconversation.com
/pol/shits will believe anything if it supports their narrative

>> No.9455168

>The Y chromosome may be a symbol of masculinity.
Stopped reading right there.

>> No.9455172

>>9455068
meaning nu-male get to pass on their genes.



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9454489 No.9454489 [Reply] [Original] [archived.moe]

>95% of all processed foods contain MSG in the US alone
>It can cause neurological disorders

/sci/fags, does your food contain MSG? Check additives, it's not even labeled.

Use your (((GCMS)))

>> No.9455180

Another thread with fear mongering mom-tier pseudoscience, just what we needed



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9454476 No.9454476 [Reply] [Original] [archived.moe]

Essentially what Quantum Mechanics and the uncertainty principle boils down to is that "nothing is really true, but some things are truer than others". This should sound familiar to those who have read Orwell's 1984.

Is quantum mechanics pseudo-science meant to brainwash us into thinking that certain political ideologies such as communism and fascism are principles inherent to reality?

7 replies omitted. Click Reply to view.
>> No.9454497

>>9454496
... or inertial, I should say.

>> No.9454506

>>9454476
As Feynman himself said, "if you think you understand quantum mechanics, you do not understand quantum machanics". What he was alluding to was the uncertainty principle. In QM nothing is supposed to be definite, and if nothing is definite no true understanding can exist, so if you think you understand quantum mechanics you don't "get it".

If on the other hand you KNEW you understood quantum mechanics, you would understand that yes it is nothing but kike pseudoscience propaganda.

>> No.9454517

>>9454482
I had a laff

>> No.9454519

>>9454506
>What he was alluding to was the uncertainty principle.
Or maybe he was alluding to hardass QCD calculations, not popsci memes lmao

>> No.9454553

>>9454493
σt * σω > 1/2
σx * σk > 1/2
p=ℏk
σx * σp > ℏ/2
QED



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9454462 No.9454462 [Reply] [Original] [archived.moe]

Prove me wrong

Protip: You can't

20 replies omitted. Click Reply to view.
>> No.9454989

@9454980
Fuck off retard.

>> No.9454994

>>9454537
>local man doesn't understand vectors

>> No.9455000

you're all dumb desu

>> No.9455059

>>9454994
ever seen a vector in the wild? yea thought so

>> No.9455117

>>9454994
>muh magical meme arrows
I vectored my dick into your mom last night, how about that



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9454456 No.9454456 [Reply] [Original] [archived.moe]

Now, I know it is all very well and good to simply point my inquiry to a search engine or a /sci/ reading list, however, they only give limited and often minimum requirements for such things.
Whereas, I would like, from those in the know, a comprehensive requirement for truly understanding quantum computing.
So, what're your suggestions mathematicians, physicists; computer scientists and engineers?

16 replies omitted. Click Reply to view.
>> No.9454533

>>9454528
I chose it for looks.

>> No.9454538

Oh and OP if you're interested in solid state physics, I can only recommend this lecture and the accompanying book.
https://podcasts.ox.ac.uk/series/oxford-solid-state-basics

Be warned, like the lecturer said in the first vid, SSP is deep. Deeper than we expect when we get into it.

>> No.9454539

>>9454532
>Ayumi is a world-class shogi (Japanese chess) player who can’t be beaten—that is, until she loses to a powerful computer called the Shooting Star. Ayumi vows to find out everything she can about her new nemesis. Lucky for her, Yuu Kano, the genius programmer behind the Shooting Star, is willing to teach her all about the inner workings of the microprocessor—the “brain” inside all computers, phones, and gadgets.

>> No.9454543

>>9454538
I'll take a look at it is certainly within my realm of interest, thank you.

>> No.9454890

You don’t need all that shit to understand quantum computing. It’s like saying you have to understand CPUs down to transistor physics to understand normal computing. You only need to know that if you want to develop quantum computers or work on very low level stuff
Just sign up for the IBM quantum computing program and try it out.



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9454413 No.9454413 [Reply] [Original] [archived.moe]

>aliens don't exi-

Imagine if this supervoid was created by aliens who were able to harvest power from the galaxies themselves dimming them down to being mostly invisible. The structure is 1 billion light years away so it's had about 1 billion years worth of technological development, how advanced would this civilization be? Why is this specific void so large?

11 replies omitted. Click Reply to view.
>> No.9454839

Light speed drive pollution. Spacetime has been warped there permanently and the light speed has been slowed down to 0 in some places. You wouldn't like to go there.

>> No.9454843

>>9454415
Or it's a massive nanite swarm slowly consuming all in its path.

>> No.9454986

>/x/ thread about Barnard 68 crackpot "void" "theory" appears on /sci/
>quality of posts is only marginally better

>> No.9455147

>>9454646
>kill yourself
Are you okay?

>> No.9455182

>>9454640
Give me just a second



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9454397 No.9454397 [Reply] [Original] [archived.moe]

Was it a boondoggle?

7 replies omitted. Click Reply to view.
>> No.9454716

>>9454397
Originally, no. However, because the government had their hands into it up to their elbows it became boondoggle. At least we got lots of cool tech we can use everyday because of it. Now NASA is completely fucking wrecked and subverted. It is filled with nothing but grant chasers now.

>> No.9455214

>>9454397

No, it wasn't and don't let anyone tell you it was. The STS program did a lot for aerospace research and materials research, more than enough to make the program worthwhile. It's crowning achievement, the International Space Station, would have been considered utter lunacy if you had suggested such a thing to someone in 1960. Boeing's recent XS-1 vehicle is proof that the STS concept works.

Now, whether or not it was the most practical transportation device available is another question. SpaceX has shown that traditional rockets could have done what the STS did at a lower cost, a huge black eye for NASA and the entire establishment. Perhaps if NASA was more committed to it's original shuttle concept (a 5-10 person vehicle with no cargo bay) and the Pentagon more committed to it's X-20 project the STS wouldn't have existed as it did.

>> No.9455224

>>9454712

$100 Billion has already been earmarked for the B-21 program, and about $200 Billion for Columbia Class submarines. $400 billion is not much for a fighter jet considering it will be THE fighter jet the Air Force, Navy and Marines will use. Which is to say it's a procurement for three branches instead of one, which would be about $130 Billion each. That's very average considering how important fighter jets are.

>> No.9455233

>>9455214
ISS is essentially Mir 2.0, and, lik Mir, could have been built and operated without STS.

>> No.9455248

The main problem is that we expect space exploration to be free of casualties and tragedies. It won't be. Many already died, many more will. This is the nature of exploration.

You're, quite literally, strapping people to a missile and shooting them into the sky. It's gonna get ugly occasionally. We need to carry on, not treat every space accident like a fucking unmitigated disaster.



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