Archived threads in /sci/ - Science & Math - 621. page
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done
thank me later
>>7664003
Having a firewall can make me prone to hacking?
What do you use /sci/ to carry your stuff to work or school? Thinking of getting pic related since I bike a lot.
Also to keep it somewhat more /sci/ related, Ill be taking a numerical methods with differential equations. What would be a good programming language to know before going into this class? Thanks
this feels like a fagboy metro fashion thread
>>7663993
mathematica
black garbage bag
I'm trying to self teach Group Theory. What books should I get for this? Also what should I know going into it?
I've been exposed to boolean logic but I have followed the standard math progression.(almost done with multivar calc)
>pic unrelated
>>7663892
http://www.amazon.com/Groups-Symmetry-Undergraduate-Texts-Mathematics/dp/0387966757
>>7663918
Also Visual Group Theory by Nathan Carter
>>7663892
Lang's Algebra
If you want to get really into it really quickly, go for groups, then rings, fields, etc. then straight into Galois theory.
My communications studies professor unironically had an example presentation showing why global warming isn't human caused. How can I prove him wrong? He used the IPCC hockey stick model saying it was false.
Don't even bother trying OP it's useless.
>communications studies
Those still exist? I thought they were a fad that died down in the 90s.
>>7663796
Don't even bother. He's in a meme field. Such people are beneath us.
Career advice for any chemist: make money and drink every night. Don't get old.
and read the latest organic chem journals every fucking day even though you don't give a fuck about asaps anymore and if you get a phd it will likely be is worthless in syn, nano, or anything but comp & ab initio bullshit
Kill the "scientific interest" as soon as you can and just leave it to hobby work. Get into industry as fast as possible.
Bonus Contest: Whoever can give me a source on how much nicolau makes at rice, I'll buy you something nice on amazon.
Whoa that dude is pretty based /justlikecooking at blogspot dot com 2012/09/nicolaou-to-rice-official.html?m=1
Shit he might be getting paid more than a football coach
does drinking alcohol preserve you?
>>7663701
Well according to my ukrainian colleagues it is useful when working with radionuclides as it helps flush them out
Hey, /sci/. This is a stupid question, but today I was talking about human evolution and natural adaption with my mom, and she asked me something that I couldn't really answer.
Basically she asked me, how does natural adaption correlate with genetics. Like I get over a period of time a common human ancestor stood up, because it was necessary to survive, but how did this transfer to his children and his children's children. It was a simple question that had me stomped.
A better question is how it would not transfer.
>>7663606
I'm saying, give me a logically answer so I can better explain it to her. How does this happen genetically? I know kids can pretty much pick up what their parents show them pretty fast(In contrast to how long the human life is), but how does these changes impact the genetics of a human having a baby?
>>7663614
You're thinking about it backwards. The mutation happens randomly, and most mutations are harmful. Occasionally a mutation happens that happens to promote survival. It doesn't happen in response to behavior or environment. Then, the actual evolution (that is, the mutation becoming ubiquitous in the population) occurs as a consequence of luck and because those with the mutation can survive better and therefore are more likely to have children (because dead people can't have children.)
This is the first time I visit this board.
Just as a theoretical question...
What would happen to human body, if it would have a fully-inclosed facial respiratory system (with proper athomspheric modulation) AND if it would be exposed the vacuum of space?
That is: what would happen, if you would have a functional breathing mask in space?
You mean like a space suit but without the suit? It would be extremely painful
>>7663572
Your body would expand and almost inflate like a balloon. Capillaries would burst, underlying tissues would be damaged, etc. But as a whole, its connective tissues would be able to hold you together.
As long as the body is intact, its blood would remain pressurized. If it had any damage to your circulatory system that resulted in it no longer being a sealed system however, its blood would be pulled out through the hole while boiling.
Cosmic rays would induce dysfunction in organ systems, blood brain barrier,...
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>>7663572
You would die extremely quickly - actually faster than you would die without the mask. Your lungs would rupture due to the 1-atmosphere pressure differential between your lungs and the outside of your body, which would in turn force gas bubbles into your bloodstream and cause a massive fatal air embolism. The keyword is "pulmonary barotrauma."
Meanwhile, with the mask off, there's no such pressure differential and you'll die from hypoxia instead, which is comparatively tamer.
Ever heard of programmable matter, /sci/?
https://en.wikipedia.org/wiki/Programmable_matter
I was wondering how I could conduct said material at home?
https://youtu.be/t41BiBCJyc4
This video claims it used active graphene-based paper with programmed gradients but I have no experience in that.
How do I do it, /sci/?
self bump
self bump
>>7663549
Mostly it's just popsci kinda shit. It's pretty much just based on thermal expansion of different materials along a surface. It's nothing all that new, honestly. They just made it out of graphene to get on I fucking love science.
>being past Calc 1
>STILL writing "dy/dx" meme notation instead of just y' or Newton
I can understand this if you're learning derivatives for the first time, since it illustrates what you're doing, but there's no reason anyone familiar with the concept should should be wasting ink or graphite by writing all of this out. You may as well write "change in y over change in x."
How's Calc 2 going for you, OP?
I thought Newton's notation is only used to represent the change in time of something.
I like more Leibniz's notation. Euler's also fine.
Is /sci/ filled with nothing but high school students and college freshmen?
Lol, even black Africans, with the second lowest iq, are smarter than the neckbeards of /sci/ that claim 150+ iq's.
http://www.olisa.tv/2015/11/15/nigerian-scholar-solves-156-year-old-mathematics-problem-called-riemann-hypothesis/
where is the solution ?
>>7663402
laughed heartily.
>>7663402
Now you are generalizing way too much, while Sub-saharans display the lowest frequency of high intelligence genes this does no mean that every single sub-saharan is stupid, just means they are more likely to display lower degree of intelligence with fewer high intelligent individuals.
Are there any actual sources on feasible antimatter production? Currently it's a byproduct of experiments not related to it, so the energy to matter conversion efficiency is insanely low. If we focused our energy on antimatter production, how high could we get? Any scientific works on that? Is more than 1% possible?
The THEORETICAL maximum is 50%, since the process inevitably produces equal quantities of antimatter and matter. However, you also need to get the input energy from somewhere, which means overall it's really a matter --> energy --> antimatter conversion process. And even if the energy --> antimatter step can reach that theoretical 50% efficiency, the matter --> energy step will be much lower. Apart from matter annihilation (which requires antimatter in the first place, so it's useless here) the best way to convert matter to energy is with fusion reactions,...
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>>7663362
Wut is going on in your pic? Look up space based antimatter harvesting
>>7663415
>>7663427
I'm talking about nuclear or orbital solar -> electricity - > antimatter. I want to take a 1TW power plant and make antimatter with it. With CERN I'd get perhaps a few million atoms or antiprotons, but their main goal is research, not industrial production, so there has to be a huge window for optimisation.
1% efficiency combined with large nuclear plants would allow commercial use for antimatter.
Everything we are is quantized. and we are constantly making progress towards reaching higher levels and entering a new octave. We exist in 3rd density therefore have 4 levels of density left before approaching a new octave of unimaginable nature. In addition the body's seven energy centers or (chakras) each have their own 7 subcenters and so on. based on this theory it can be observed that the universe extend both infinitely smaller and infinitely larger. placing us somewhere in the middle of progress. we have come a long way and have a lot of time left, so why waste your...
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>>7663358
Shill harder fatty
>>7663348
>Everything we are is quantized.
I lean towards a similar conclusion. It isn't known i subdivision of matter is infinite, nor if time and space are granular. Subdivision could loop back on itself, for example. The smallest small being the largest large. Therefore, at all intervals, you are the smallest, the largest, and neither, at the same time. You're just unable to see the whole.
> instead we should be accepting of everything that happens and...
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Hey /sci/ does anyone know a way to find the vertex of an n-dimensional paraboloid?
I think it exists but I cannot find it.
Thanks /sci/
>>7663344
Help me sci you are my only hope.
What is your argument for the existence of that vertex ?
>>7663374
>I haven't taken calc III yet
There's this schizophrenic bully I know. Doesn't directly affect me but a lot of other people are getting really sick of him. Any way I can corrupt his already fragile mind?
>>7663295
Have you tried bullying him?
>>7663298
He's a big motherfucker, 6ft5 at least. However, he has a short temper and an unstable mind. This I can work with, I just need a method on how to.
>>7663295
Throw a mattress in his pool.
It takes a crane to get it out.
Sup /sci/. I came here because I heard that the smartest people on 4chan dwell on this board. I come with a question. Can climate change realistically be stopped? And if so, how?
Not looking for an argument, every rational being knows that global warming exists, and it is obvious we have contributed to our problems. However, I am looking for any solutions people may have. Pitch.
climate change ≠global warming
>>7663234
Global warming leads to climate change, doofus.
Now put an idea out or leave.
If you stop the emissions the climate will normalize on its own.
