Archived threads in /sci/ - Science & Math - 94. page
Images are sometimes not shown due to bandwidth/network limitations. Refreshing the page usually helps.
/sci/, I want to learn about concrete and cement, especially geopolymers. Not engineering stuff -- i.e., how to use it -- but more underlying basic physics and chemistry of it. Can anyone recommend a book or a review article?
>>8124526
it silicone
>>8124537
Silicone is what you use to make boobs bigger you dummy.
>>8124543
Don't you make boobs bigger with concrete?
I want to program science stuff but I also like messing around with making cool OpenGL shit. I know python but it gets really slow as soon as you run anything a bit complex. What's the best language for my needs? C, Lisp, Matlab?
>>8124442
Julia
>>8124442
In the real world anything under 1000 lines of code Matlab, more than that C or FORTRAN.
C has everything object oriented, procedural, machine level.
http://www.sci.brooklyn.cuny.edu/~mate/nml/numanal.pdf
https://www.cs.rit.edu/~ats/books/ooc.pdf
Cool book on Windows games in C - get a new one with the disk.
http://www.amazon.com/Windows-Programming-Dummies-eacute-LaMothe/dp/0764516787
Basic DS
http://www.amazon.com/Programming-Abstractions-Computer-Science-Paperback/dp/B004D81WSE
Also...
Comment too long. Click here to view the full text.
>>8124442
>I know python but it gets really slow as soon as you run anything a bit complex
that's because you suck at programming. you can try C and openGL but then you will just have even more complexity that you can fuck up. learn to program properly and then try again.
If the Many Worlds Interpretation is true, does that mean that there is a Benny Hill universe out there?
https://www.youtube.com/watch?v=SZ-4cWCZVuM
> If the Many Worlds Interpretation is true
It's not.
/thread
>>8124361
[Citation Needed]
>>8124359
The cops are exactly the same though.
https://www.youtube.com/watch?v=2M8_DZvF2FI
Is terraforming a possibility? And if so, would it even be worth it given the time it would take?
>>8124264
>And if so, would it even be worth it given the time it would take?
The biggest problem with humanity is it's utter contempt for overhead costs.
>>8124264
would terraforming the moon be possible if we surrounded it with massive superconducting rings to make a magnetic field strong enough that we could sustain an atmosphere? I saw a paper about doing it for earth and they said something like the power from 12 nuclear power stations could easily produce a magnetic field something like 10% the strength of the earth's (i cant find the paper now but anyone else who has read it please correct me if im wrong) and it got me thinking about the moon.
>>8124403
No. Gravity is way too low. Same with Mars though gravity isn't that far off to keep the atmosphere in place for an extended period.
What's your opinion about this contest ?
If you like math so much, why don't own a gold medal from IMO, anon ?
How many problems can you resolve ?
>>8124198
>If you like math so much, why don't own a gold medal from IMO, anon ?
cuz i can barely qualify for the USAMO and even then i score like a 10
>>8124198
Mathematical contests are more about how well you can apply trivial knowledge in convoluted ways - it has nothing to do with how good of a mathematician you are.
That said, you should definitely feel good if you do well in them, but if you don't do well, you shouldn't feel bad either because it says nothing about how good you are at maths.
I enjoyed the preliminaries to the IMO when I was a kid but I didn't have much time to prepare for it since I wasn't told that I was being entered.
I...
Comment too long. Click here to view the full text.
Is it just my shitty UT campus or does every math department not tell you what text you need for the class until the first day of class?
What kind of retarded shit is this? Also no online syllabus or anything else. I hope this is not typical.
>>8124176
It is typical. You don't need to start studying before the class begins.
>>8124183
Even for a summer session with classes Monday through Friday? Seems a bit shortsighted but ok.
>>8124185
post syllabus here and people can tell you what you need. otherwise, email the professor.
Best way to understand PROBABILITY to study for a test?
i am not good in math, i like the theory behind, but sucks on tests, want to know a trick to be bettter in Probability.
>>8124155
it's all about the sample set and events
everything else is decoration around these abstract concepts that's designed to make it easy to understand.
>>8124169
Thanks for the advice.
Serious this is bullshit. I've tried like 30 exercises from stewart and these theorems always left =/= right. Also stewart never really goes trough both sides for an example.
Then you just suck in math.
Then you just suck in math.
If you cant get these to work, chances are you're confused about something fairly fundamental. Are you sure you know what all of the symbols mean?
>be me
>be at the end of high school
>need to pass the final exam
>I need to pass these exam with 10 or 9 to reach at good university
>The only problem is that fucking biology
How in the hell can I or should I study all this stuff. There's no logic in biology, to be honest, nothing. You just need to fucking memorise all this crap.
I'm good at math, and I will pass with perfect score, but I'm...
Comment too long. Click here to view the full text.
>You just need to fucking memorize all this crap.
So fucking memorize it. Bio is easy mode. Especially fucking high school biology.
>>8124049
nothing you can do, really. just memorize it and maybe make some pictures so you can deceive yourself into thinking you have an intuitive understanding of it
No logic in biology? Bro, unless you're doing taxonomy that's complete bs
Everything revolves around food and reproduction.
Everything is mostly conserved with slight tweaks from molecules utilized for chemical reactions, genetic information and body parts.
Evolution is the change in the frequency of alleles (look up Hardy Weinberg).
DNA encodes RNA encodes Protein.
We know that the space is expanding because of the redshift of the galaxies but, how can we compare the color we are receiving with the color they really are concluding the redshift if we do not even know their colors? Or do we know them?
How do we know that the galaxies are "green apples"?
>>8124043
It's not that the colors are different from what they "really are" it's that we see the color changing (wavelength getting bigger) which must mean the galaxies are receding from us.
>>8124043
Spectral patterns.
Each element and molecule has it's own emission/absorption spectrum determined by it's electronic structure. The spectrum describes the frequencies of light that the atom/molecule can accept or emit, which depends on the differences in energy levels between electron orbitals, which critically depends on the composition of the atom/molecule.
Thus, spectral patterns act as a sort of fingerprint that scientists can use to determine chemical composition by just looking at light.
When...
Comment too long. Click here to view the full text.
>>8124064
>which must mean the galaxies are receding from us.
why
in MKultra style mind control what is the exact method of programming done on the brain to cause it to retain information?
I want to program a brain, however without splitting it into multiple personalities. Is trauma a required part of the programming or is it only necessary to split the subject into multiple personalities?
>>8124035
bump one of you guys must know occult sciences
>>8124035
Repetition should be fine. If a person sees or hears the same mantra again and again over a period of weeks or even months, he will inevitably store it in his brain. This is a fundamental principle of propaganda. Just make sure the message isn't too long or too complicated. The shorter the memetic mantra, the easier it will spread.
Is he actually going to do it, or is he just an absolute madman?
http://www.sens.org
>>8123971
MADMAN
do what
>>8123971
I remember when my friend told me about this guy and what he planned to do. He then showed me his picture and I just burst out laughing.
Lockheed Martin is building an interplanetary spaceship bound for Mars in 2028. It will be built with NASA SLS launches and use Orion to ferry crew. No mention of SpaceX.
http://lockheedmartin.com/us/ssc/mars-orion.html
https://www.washingtonpost.com/news/speaking-of-science/wp/2016/05/24/could-this-mars-base-camp-really-send-astronauts-to-the-red-planet-in-2028/
SpaceX BTFO
According to Ben Rich they figured this out years ago:
>1 : “Inside the Skunk Works (Lockheed’s secret research and development entity), we were a small, intensely cohesive group consisting of about fifty veteran engineers and designers and a hundred or so expert machinists and shop workers. Our forte was building technologically advanced airplanes of small number and of high class for highly secret missions.”
>2 : “We already have the means to travel among the stars, but these technologies are locked...
Comment too long. Click here to view the full text.
>>8123897
Umm /x/ is that way...
And that quote has never been verified. Completely unsourced hearsay.
>>8123897
"OH BOY
I CANT BELIEVE IT'S NOT BULLSHIT"*
-Also someone i guess.
*[citation needed]
Why don't we cherry pick human sperms to create healthier, stronger and smarter people, just as we do with the animals we eat?
>>8123739
We do. It's called sperm donation.
>>8123739
We do, Anon, it's called courting.
Women pick the men they want to have inseminate them, at least, more often than not in the developed world.
As a result, not much happens. Because people, women included, are kinda dumb, and our current society does just fine despite having 0 breeding pressure.
>>8123739
because we don't eat humans
farm animals and "pure breed" pets are retarded as fuck too.
What are the applications of toruses?
>>8123677
what are the applications of a cube though?
It's a compact manifold that is flat.
>>8123677
they go good with coffee idk what do u want us to say
