[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y ] [Search | Free Show | Home]

Archived threads in /sci/ - Science & Math - 2170. page

This is a blue board which means that it's for everybody (Safe For Work content only). If you see any adult content, please report it.

File: animu.png (457KB, 792x792px) Image search: [Google]
animu.png
457KB, 792x792px
Why is algebraic topology so hard?
24 posts and 5 images submitted.
>>
because you like anime
>>
>>7646313
this
>>
>>7646348
I don't, I just like the picture.

File: pigs.jpg (130KB, 639x426px) Image search: [Google]
pigs.jpg
130KB, 639x426px
I grew up next to a slaughterhouse and was sometimes woken up by shrieks of pigs who were about to be killed. Can't we just gas animals (with helium) instead or is that technically impossible? Would be more animal-friendly and at least and also less distressing for the workers I guess.
27 posts and 4 images submitted.
>>
>>7646240
Helium definitely not, it would be completely impractical. You probably could asphyxiate them with high percent nitrogen air mixtures, but that would also be extraordinarily expensive (just in terms of time required making vacuum sealed rooms), and it may affect the quality of the meat. Anything other than nitrogen would be too expensive to be considered.
>>
Helium is expensive and it has more important uses than in animal slaughter, Mr. Sad Frog.
>>
>>7646240
sleep tight porker

Is the placebo effect really as powerful as people claim it is? If so, can doctors prescribe you sugar pills without telling you?

pic unrelated
24 posts and 2 images submitted.
>>
File: 1421041579238.png (98KB, 594x315px) Image search: [Google]
1421041579238.png
98KB, 594x315px
Sure. Its even more potent if you apply homeopathic principals. So one sugar molecule will literally cure all cancers. Big farma of course doesn't want you to know this secret.
>>
>>7646196
>Is the placebo effect really as powerful as people claim it is?

Depends on how powerful "they" say it is. It's important to remember that just because you feel better doesn't mean you are better.

>If so, can doctors prescribe you sugar pills without telling you?

No because that's hilariously unethical.
>>
Yes it is very powerful you can research that yourself. And no doctors can't legally give you a sugar pill. Doctors don't actually make the medication they get it from a supplier. So unless the doctor is ordering sugar pills (which looks shady) they are giving you exactly what they ordered from the supplier

Who is at the forefront of the development of AI? Soon finished my master's degree, and so I want to dedicate my whole life to science, I would like to get the PhD where I will work or nearby. I am now considering the option of German, TUM, but it is worth to have a fallback.
32 posts and 2 images submitted.
>>
>>7646100
The forefront is at Google Deepmind. They are in London.

I don't know if you'll get there though: they're hiring, but you basically need to be a genius to get in.
>>
>>7646150
I don`t want to work with Google or Facebook.
>>
>>7646150
IBM or Google. Watson, Deepmind and BostonDynamics all look promising.

File: muhRechnungBesser.jpg (38KB, 1033x198px) Image search: [Google]
muhRechnungBesser.jpg
38KB, 1033x198px
I came up with this and want to prove it but I dont know how, any idea?
13 posts and 1 images submitted.
>>
>>7646074
Wouldn't it just be how you came up with it worked backward?
>>
[eqn]3 \sum_{x=0}^y 3^x = \sum_{x=1}^{y+1} 3^x = \sum_{x=0}^y 3^x + 3^{y+1} -1[/eqn]
Therefore
[eqn] 2 \sum_{x = 0}^y 3^x = 3^{y+1}-1[/eqn]
>>
>[math]y \in \mathbb{N}[/math]
>[math]y > 0[/math]

why...

File: 1446954718952.jpg (541KB, 3400x2400px) Image search: [Google]
1446954718952.jpg
541KB, 3400x2400px
Anyone else get anxiety looking at pictures of large planets/space? I don't have a fear of heights but this stuff is really spooky to me.

ITT post space.
35 posts and 6 images submitted.
>>
>>7646047
what a pussy faggot you are

"ooooh I get anxiety looking at space because big and we small xd"

fuck off, you should have posted this in a cringe thread
>>
>>7646047
Me too. It's just so creepy, a massive ball hanging in nothing. Uranus is creepiest. So featureless, just sitting there. "WHAT DO YOU WANT????"

"Uranus"

:S
>>
>>7646047
>>7646055
Would be more spooky if the opposite was the case (human not able to see in space or no big objects in space)
givs me a safe feeling, cause one can see that everything is going well since billions of years and we can just do our shit like post on /sci/

File: 10000-hours.jpg (46KB, 600x360px) Image search: [Google]
10000-hours.jpg
46KB, 600x360px
Is talent/genius derived from nature or nurture?

Einstein was a genius. He had three children who shared 50% of the same DNA as Einstein himself. Two lived fairly mediocre lives. One became a successful professor. One became mentally ill. His parents were also nothing spectacular. So much for the "nature" theory then...

But as a social experiment, the Polgar sisters were trained from birth to be excellent chess players precisely in order to test the nature vs. nurture theory. It worked, and one of them became the 1st ranked female chess player in the world and 8th overall. Surely that means that the "nurture" theory is correct? But their father was also a highly talented chess player who wrote numerous books on the subject...

Von Neumann was an excellent physicist, mathematician, economist, and computer scientist. At the age of 5, he could divide two 8-digit numbers in his head. At the age of 8, he taught himself differential and integral calculus. If such talents could be simply taught to toddlers using the correct "nurture method" then why isn't this happening today?

What about people like William James Sidis? Tiger Woods? Ramanujan? Usain Bolt? Mozart? (who was recognized as a prodigy at 2 years old and composed his first symphony at 8 years) Where do these people fit in?

Malcolm Gladwell talks about this in his book "Outliers" where he claims that 10,000 hours of practice is enough to make anyone an expert in any field. Presumably this means that I could become the next Einstein by dedicating 8 hours of each day towards learning physics for the next 3.6 years. Or the next Usain Bolt by practicing running for 8 hours per day for the next 3.6 years.

What are your thoughts on this?
25 posts and 4 images submitted.
>>
File: 20101130.gif (355KB, 540x3494px) Image search: [Google]
20101130.gif
355KB, 540x3494px
Having good genes in terms of intelligence is certainly a good head start. You can't expect someone with below average intelligence to excel in and massively contribute to any scientific field. So being born with good genes is certainly a precursor for success. It is however not a guarantee for success. If you don't work hard or live in poor conditions you will still just be a burger flipper with good genes. So both nature and nurture play a role in this, not the one or the other, but both.
>>
>>7645975
> why this isn't happening today?

This IS happening today, just look at all these people on 4chan, we now have so many gifted senpai s that with some time we may get close to solve the hardest questions
>>
>>7645985

> You can't expect someone with below average intelligence to excel in and massively contribute to any scientific field.

This I agree with. As someone who has met people with moderate special needs before, I can safely say that someone with an IQ of 60 and has Downs syndrome isn't going to win a Nobel prize in the sciences, discover the cure for cancer, or solve a Millennium prize problem no matter how motivated they are.

>If you don't work hard or live in poor conditions you will still just be a burger flipper with good genes.

But what about Ramanujan?

"Srinivasa Ramanujan Iyengar FRS (22 December 1887 – 26 April 1920) was an Indian mathematician and autodidact who, with almost no formal training in pure mathematics, made extraordinary contributions to mathematical analysis, number theory, infinite series, and continued fractions. Ramanujan initially developed his own mathematical research in isolation; it was quickly recognized by Indian mathematicians. When his skills became apparent to the wider mathematical community, centred in Europe at the time, he began a famous partnership with the English mathematician G. H. Hardy. He rediscovered previously known theorems in addition to producing new theorems.

During his short life, Ramanujan independently compiled nearly 3900 results (mostly identities and equations).[1] Nearly all his claims have now been proven correct, although some were already known.[2] He stated results that were both original and highly unconventional, such as the Ramanujan prime and the Ramanujan theta function, and these have inspired a vast amount of further research.[3] The Ramanujan Journal, an international publication, was launched to publish work in all areas of mathematics influenced by his work.[4]"

What is the purpose of sleep? It's not like we get energy from it or anything.
19 posts and 2 images submitted.
>>
>>7645962
it's to prevent you're braine from overeating
>>
>>7645962
We used to not have light at night. Electricity is a recent thing, you know. Our consiousness couldn't function after the sunt went dow, due to the lack stimulae.
>>
Do you think it is possible to invest something that would allow a human to not ever need to sleep?

File: knowledge-is-power.jpg (23KB, 407x294px) Image search: [Google]
knowledge-is-power.jpg
23KB, 407x294px
What are some comfy YouTube channels for science-related topics? I have a small science background (undergrad in psychology >psychology is science) but just enjoy learning and like to fall asleep to YT videos.
13 posts and 2 images submitted.
>>
you could watch lecture videos i guess
>>
>>7645827
any good sources? (besides the obvious like ted)

bonus points if psychology related because I'm studying computer engineering in the context of psychology
>>
>>7645831

MIT, Yale, and Stanford have good channels with playlists of lectures. i don't know how many pertain to psychology but if you search a particular sub-field i'm sure a lecture video will show up

File: em drive.jpg (8KB, 274x184px) Image search: [Google]
em drive.jpg
8KB, 274x184px
I'm no physicist, but there's been some confusing claims made about this thing.
Some are calling is it a perpetual motion/free energy machine. It's not is it?
Some are calling it a warp drive. It's not is it?
As far as I can tell, the main claim is that it produces thrust contrary to conservation of momentum, and there is no good account of how. But why hasn't it been written up yet? I'm reminded of the cold fusion blunder.
17 posts and 2 images submitted.
>>
>>7645727
Ah German Weiner pump
>>
>>7645727
>free energy
not nearly efficient enough for that.
>warp drive
some space warp has been detected but very little.

It's just a better thruster in space that can run forever.
>>
>>7646335
Doesn't reactionless thrust imply free energy?

File: NaiveLinearCrocodile[1].webm (148KB, 854x480px) Image search: [Google]
NaiveLinearCrocodile[1].webm
148KB, 854x480px
http://www.popsci.com/allen-telescope-array-hunted-for-alien-megastructures-and-found-nothing

> Could there be aliens around the star KIC 8462852? You may either be relieved or disappointed to find out that the Allen Telescope Array scanned the star for evidence of advanced civilizations, and has come up empty.

Dyson Spherers BTFO. Accept that there are no ayyliens and move on.
39 posts and 8 images submitted.
>>
File: le libertarian trashman.jpg (27KB, 948x711px) Image search: [Google]
le libertarian trashman.jpg
27KB, 948x711px
>http://www.popsci.com
>>
>>7645624

>This rules out omnidirectional transmitters of approximately 100 times today’s total terrestrial energy usage in the case of the narrowband signals, and 10 million times that usage for broadband emissions.

Pardon me if I'm not convinced this is anything but the weakest constraint on the presence or absence of ayylmaos.
>>
>>7645643
it isn't. If they were signaling anything on a channel, we would have caught a glimpse of it. But we didn't. Because it's not aliens. It's never aliens.

File: hmmm.jpg (19KB, 297x202px) Image search: [Google]
hmmm.jpg
19KB, 297x202px
So I saw this space time/gravity visualized shit and thought it was pretty neat. It's basically the universe as a 2D plane and when matter is present, it pushes down on it and makes other matter revolve around it (to describe gravity). I then realized that the theory of this was using gravity to describe gravity itself.

So, is this okay or not for it? Does that deem the theory false? Correct me if I'm wrong.
53 posts and 8 images submitted.
>>
>>7645569
It's just a representation of an idea, stop reading into it too much.
>>
its taking the concept of mass in the 4-dimension effecting the 3rd dimension, but taking it down a knotch so humans can understand

so mass in the third dimension warps the second dimension, just how mass in the fourth dimension warps our percieved third dimension
>>
>>7645569
No it doesn't. It's saying that objects move in straight lines along the curved spacetime. The curve in spacetime is gravity, it is not caused by gravity.

File: Polispasto2B[1].jpg (26KB, 375x659px) Image search: [Google]
Polispasto2B[1].jpg
26KB, 375x659px
I genuinely don't understand how this works. It makes no intuitive sense to me.

If I'd look at this I'd think you'd have to pull 100N since you not only have to lift the weight but also got friction on the rolling parts.
Someone explain this magic to me. I'm a fucking retard.
24 posts and 4 images submitted.
>>
>>7645552
more than 100N*
>>
>>7645552
Anything with numbers like this doesn't include friction. The weight is split in half. 50 going to the ceiling through the purple part of the pulley, and the other 50 going to the long part of the rope. All the pulley does is change the direction of the force. It changes the red 50 so that it pulls up on the weight
>>
the top pulley is weight bearing hth

File: image.png (343KB, 1242x2208px) Image search: [Google]
image.png
343KB, 1242x2208px
Is /sci/ smarter then the average Facebook user
72 posts and 6 images submitted.
>>
>>7645531
It can't be simplified any further.
>>
9^(8x^2) bruh
>>
9^(8x)^2

/sci/ how is this clear? I don't think it is clear.
12 posts and 2 images submitted.
>>
This is mathematics.
Clear means get your paper, get your pen, and after some writing, you'll see its true. Clear does not mean it should be immediately obvious to you just by looking at it.
>>
>>7645412
Um, duh?
That circled part is fucking basic algebra.
>>
File: 61c.jpg (28KB, 600x600px) Image search: [Google]
61c.jpg
28KB, 600x600px
>>7645414

Pages: [First page] [Previous page] [2160] [2161] [2162] [2163] [2164] [2165] [2166] [2167] [2168] [2169] [2170] [2171] [2172] [2173] [2174] [2175] [2176] [2177] [2178] [2179] [2180] [Next page] [Last page]

[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y] [Search | Top | Home]

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/


If you need a post removed click on it's [Report] button and follow the instruction.
DMCA Content Takedown via dmca.com
All images are hosted on imgur.com.
If you like this website please support us by donating with Bitcoins at 16mKtbZiwW52BLkibtCr8jUg2KVUMTxVQ5
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.
This is a 4chan archive - all of the content originated from that site.
This means that RandomArchive shows their content, archived.
If you need information for a Poster - contact them.