Archived threads in /sci/ - Science & Math - 244. page
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I have a question /sci/
I understand the brain operates on waves and frequencies. Are things such as electronic dream manipulation possible?
>>7977320
Technically, yes. But the devices you'd need to be hooked up to would be in contact with your head. Not just some signal beamed in from somewhere else like a radio signal. It'd need to essentially map out your brain and stimulate it on a 3D grid. It'd work kind of like the way zapping cancer does with radiation, with multiple sources of signal hitting one point from different directions to help prevent false positives.
>>7977326
This basically.
But it isn't possible with present day technology. We're probably hundreds of years away from even the most basic prototype.
Why do most talented scientist/mathematician either end up single or married but unhappy? Even people like Einstein, John Von Newmann ended up divorced at least once.
The godfather of deep learning, 60+ in age, Geoffrey Hinton doesn't even marry.
Is it because of women are a hinder for them in general, or is it just because their husbands are just nerds who don't know how to please a woman? I have heard story about scientists like Einstein neglect his wife all the time because he dedicated too much time for science.
Anyway, Alan Turing doesn't...
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>>7977258
>most
>cite 3
>attempt to draw conclusions for this imaginary happening from a single case
no
>>7977258
[citations needed]
>>7977258
Too busy. Theyre too interested and driven into what theyre doing. Look at Donald Trump, he loves making money, so much so he's been divorced more than once because he didn't spend time with the wifey. As Tracy Morgan would say: "gotta work the vay jay jay"
Post pictures of tough puzzles. Ill start
2nd
Post some interesting math problems, not this gay ass pattern bullshit
How would you solve this equation system with trigonometric functions? (If it even have a solution).
$x*(cos(\theta) - 1) + y*(sin(\theta)) = 0 $
$x*(-sin(\theta)) + y*(cos(\theta) - 1) = 0 $
I'm getting the eigenvectors for a rotation matrix. Since I'm such a dumbass with trigonometric functions, it was for me a full challenge to get to the eigenvalues, but I did it with the help of 4chan/sci.
Now I'm stuck again finding the eigenvectors for the corresponding eigenvalues. The equation in the image correspond to an eigenvalue 1 (I get...
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>>7977245
well, the rotation preserves both x and y
so the angle must be a multiple of 2*pi
I don't know hot to call Tex code here >.<
$x*(cos(\theta) - 1) + y*(sin(\theta)) = 0 $
$x*(-sin(\theta)) + y*(cos(\theta) - 1) = 0 $
>>7977249
let me elaborate. a 2x2 matrix (a linear transformation from R^2 to R^2) which has the form
[ a, b]
[-b, a]
is actually isomorphic to a complex linear transformation from C to C, which is defined by multiplying by (a+bi), or (a-bi) depending on how you want to define i.
so this matrix you're looking at, where T(x, y) = (x, y) is actually the equation
(cost - isent)(x+yi) = x+y
which is exactly
z*e^(it) = z
so e^(it)=1, giving t = k*2pi
How feasible /sci/?
>>7977242
Nuclear power is dead.
>>7977250
N...no
>>7977250
i disagree.
Its actually expanding in usage globally and in the US.
>Nuclear power capacity worldwide is increasing steadily, with over 60 reactors under construction in 15 countries.
http://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide.aspx
Its has a great EROEI and is CO2 emission free
Whats the best paying cs job /sci/
>>7977227
>cs
>>7977227
>cs
Enjoy getting replaced by pajeet. Shouldn't have fell for the STEM meme.
>>7977227
the best paying cs job is the self employed one..
I learned that jellyfish shit through the same mouth they eat through. Imagine being a jellyfish. Going through this would be some kind of living hell. It would be like a real life human centipede.
>>7977218
>Imagine being a jellyfish. Going through this would be some kind of living hell.
Indeed, if jellyfish were actually conscious and had the same nervous system as humans, that would be the case.
Imagine living in the ocean and living in an endless field of shit and piss everywhere
>>7977225
I'm a bit jelly actually, probably better than living in India.
What is the Holy Bible for your field?
>>7977185
https://www.youtube.com/watch?v=KlPC3O1DVcg
>>7977190
Totally not biased, being from the author of the book.
Of course C is obsolete, that's why all the top CS departments still teach core classes like Operating systems in it.
Do you have aspergers/autism?
Is it true that having high intelligence increases the chance of you having autistic traits and poor social skills?
>>7977037
no, you're just a closet autist. Stop trying to justify it by thinking it's due to the fact that you're UBER intelligent
>>7977037
Yes, I have both aspergers and low functioning autism. I think these traits largely stem from the fact that I'm so well intellectually endowed.
When you outpace everyone to the point of doing laps around them, mentally, it can be isolating. Simple interactions become complex puzzles due to my heightened intelligence, and ability to see more where others see less.
>>7977037
Savantism and autism aren't the same thing, no.
Let's talk about time(physics).
You go back in time and kill your grandfather before he meets your grandmother, therefore you don't exist, and if you don't exist, how could you have killed your grandfather, so by default, your grandfather lives because no one exists to kill him.
Correct me if I'm wrong
Your premise is wrong because time travel is impossible.
>>7976911
Assuming it's possible, mann
>>7976917
uhh.. It's not a legitimate hypothetical question. It's like me asking you to assume something exists and doesn't at the same time.
So. Penises.
After getting some penis enlargement spam, I decided it'd be interesting to look through the actual scientific literature regarding the growth of cocks.
Now, I found that it was thought that when penile tissue grows in response to testosterone, the number of testosterone receptors is decreased, and this was the primary mechanism for limiting the final size of the penis.
I found one paper, however, which found that while adult penile tissue in rats had no testosterone receptors left, the same was not true in adult great apes.
This...
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>>7976886
>penis enlargement spam
Nice try, but hackers stopped making that joke a long time ago. Some time around 2433 IIRC.
I don't appreciate you shaming the phallically challenged.
>>7976886
go vegan dude you'll get thicker harder erections and lose body fat so dick will appear bigger and perform at its maximum potential.
cool idea though
What games do play that are based on math?
game theory
math
Can't all games be described mathematically?
Ill admit I've been a loser in real life but now I'm ready to step up to the plate. What's a branch of science where I have a possibility of making a great discovery by myself and becoming a world-renowned name. No half-assed shit either, it has to be great, ideally related to space. I will cite this board for directing me on my path to greatness when the time comes. Ps I have to be able to do it from the comfort of my room.
>>7976807
Build a mini space rocket in your room, put cat inside, send it to space and film it as it explodes in the air. You'll be world-renowned for your space-related achievement in no time.
>>7976807
How old are you? Ambition is fine, but you should be realistic in your ambition. You have the greatest chance of being successful in something you have a legitimate passion about.
Holy shit you're a faggot
You should make some advances in noose technology. For humanity
Anyone with experience in organic chemistry out there? I need to know if this diagram is correct.
I am supposed to show how a glycine and a valine amino acid form a peptide bond.
It's wrong.
ok how so?
http://lmgtfy.com/?q=peptide+bond
What are good linear algebra and analysis text books to prepare me for a course in differential geometry and topology? I have some back ground in linear algebra and analysis, but not as much as the course requires, so I'd like to catch up a little.
Also general text book thread
>pic unrelated, I don't know which text books the course will be based on
I can recommend "Linear algebra done right". I picked it up because i wanted a more rigorous approach to LA after a shitty course aimed for engineers. It proves everything without determinants which makes things crystal clear. Very demanding exercises (for me, atleast), 100% proofs.
I don't know too much about linear algebra texts, but I like Linear Algebra Done Right. For Analysis Pugh's "Real Mathematical Analysis" has a healthy chapter on metric space topology.
>>7976544
is this book any good ?
