Archived threads in /sci/ - Science & Math - 136. page
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How do I into CFD, /sci/? I've majored in math and computer science and I'm starting a Ph.D. In the fall. I may very well be working with some CFD apps so I want to get a head start.
Also I have access to some testbed supercomputers I can play with, so I thought it'd be interesting to try implementing some stuff.
Where do I start?
Learn fluid mechanics, play with the free baby version of adina until you understand how it works.
>>8085247
Lmfao is that cow aerodynamics or something? Hahahaha I can't stop laughing
>born too late to explore the earth
>born too early to explore the universe
>born just in time to witness the research of cow aerodynamics
Is this really how evolution works? I thought it was mostly random mutation and then if that mutation was a stronger trait, that line would keep producing, via survival of the fittest.
If this is true, do you think humans in the far future will evolve to have more dexterous fingers and larger eyes due to our constant interaction with digital technology?
as the title says, this is Lamarckism, which was an early contender hypothesis and was discarded long ago
>>8085141
Oh, that makes sense. I should have googled that first. My bad
>>8085139
Mostly no, but sometimes yes. As pointed out above, this describes Lamarckian inheritance, which is not the mechanism for the origin / development of adaptations or traits in the majority of cases.
I just wanted to add some nuance here and point out that, in fact, this mechanism sometimes does apply. For instance, certain bacteria can acquire a trait (e.g. antibiotic resistance) and then pass it on to their offspring. Also, under certain conditions the environment can lead to the epigenetic silencing or expression...
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Specify function and domain and I'll generate a plot of it on the complex plane.
Example: [math]f(z)=\frac{1}{z}[/math] from [math](-1-i)[/math] to [math](1+i)[/math].
>>8085106
Here's what the example looks like.
>>8085106
does it have to be in closed form?
can you plot a color map for reference? (is it f(z) = |z| ? or does it account for real and imaginary part?)
[math]f(z) = exp(z)[/math] between (-1-i) and (1+i) pls
>>8085113
It accounts for real and imaginary parts.
Here's your function.
How will we even cope in 2050 when the superbugs have wiped out the few antibiotics we have left working?
>>8085071
>one person every three seconds
Great, China, India and Africa really needs that.
>>8085071
>2020: Western governments loosen the regulations surrounding drug development. Prisoners are now forced into drug testing whether they like it or not.
>2025: New antibiotics are developed at massively reduced cost and time.
>2050: The intervening 25 years passes without incident.
Simple.
>still beleiving any of this shit
The first ten prime numbers are
02, 03, 05, 07, 11, 13, 17, 19, 23, 29...
Is there a prime number when turned around (the 1st digit becoming the 2nd and the 2nd the 1st) it's still a prime?
For example 13, changes to 31, which is a prime.
Are there any other primes like this?
Is this problem known?
Well for one the first # in the 13 or 15 has to be odd
79.
It might be unknown.
>>8084828
Also any palindrome primes like 101 or 131.
Ok dumb question: if we can send a man to the moon why cant we go to the earths deepest points with suits just as safe as soace suits? It shouldnt be that difficult can it?picture unrelated.
*space
>It shouldnt be that difficult can it?
Butchered, mentally-disabled grammar aside, what reason do you have to believe it shouldn't be difficult? Of course it's fucking difficult, how in the hell is a suit meant to keep you upright against pressures of over 1000 atmospheres? The mariana trench has been reached via manned missions, but they sure as hell didn't go out of their pod for a stroll along the ocean floor.
>>8084762
I will forgive your childish demeanor due to my "grammar" this once you little shit.i just asked a question. Fucking christ. Yes i know that the force on the ocean is immense but the fact that we have managed to walk on the moon we'd be able to create a suit able to withstand such water pressure.
Are people becoming more and more conscious? This question has been bothering me
>>8084743
We are woke
>>8084743
No but I'm becoming more and more depressed
>>8084743
I define consciousness as being intelligence, so yes.
/sci/, I think I'm addicted to studying.
I honestly don't like doing anything else. I don't get any joy whatsoever from video games, TV shows, or recreational books that I used to love. It all bores me and feels like a waste of time, and all I can think about when I'm trying to relax is school. I even dream about the material- regularly.
Is there something wrong with me? Is anyone else like this?
Don't worry, you'll burn out.
You can study my balls bouncing on your mothers chin.
You have found a passion for learning.
Congratulations.
Hey /sci/, how can a high school graduate start self-learning over the summer to prepare for the start of a Physics degree? I've just completed the AP Physics E&M course, and pretty much have my mind set on physics. But, I'm not exactly sure where I should go from here. Are there any good textbooks that you guys can suggest I move on to? What topics/math should I learn next? Pic related is the textbook that we used, for context.
Khaaaaan!
Watch professor leonard's calculus videos
>>8084446
>But, I'm not exactly sure where I should go from here.
Math:
-Do you know vector calculus? If not learn that.
-Linear Algebra is generally the next step.
Physics:
- Maybe go through a slightly more advanced take on E&M. At the level of like Purcell. (You can try Griffiths although you will likely be lost without knowledge of diff eqs)
- Special Relativity or General Wave mechanics is also an option.
So wait, can children not be less than 9 months apart normally?
>>8084366
Did you just watch that Horace and Pete episode, too? Man that shows pretty funny t b h despite all the preaching from Louis Cuck King
>>8084366
premature births buddy boyo
muh irish twins
>>8084385
Yea but i mean "normally."
Where does time go after we perceive it?
>>8084324
Where is the past ?
I think it's always there but we can no longer perceive it.
Into the trash
>>8084331
Behind you.
Hi, any 1st world anon studiying or working in uni here?
I need to get a paper and can't access because of no money ;_;
I already tried sci hub but didn't work.
Would any of you help me with this?
>>8084063
Also link:
http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/TESTEVAL/PAGES/JTE101517.htm
>>8084063
Hahahaha, no.
Paywalls is how we keep 3rd world shitholes down in the gutter.
>>8084076
Please. 25USD is like my weekly wage.
A few nights ago I saw stars in the sky except one was blasting across the sky at exceptionally high speeds. It was around the same brightness as the other stars and had no tail or anything. Now I look at the sky all the time and airplanes always have red or green flashing lights on and they don't appear to move that fast against the stars especially if they're so high they're just a dot. Was it aliens?
>>8083929
>>/x/
>>8083937
Hey I'm just asking for an explanation as to what I saw. No need to be a dick.
>>8083948
We don't fucking know, nigga. Probably just your autism playing tricks on you.
![CirLpVoXEAEz1XL[1].jpg](https://i.imgur.com/9i2bSRL.jpg "CirLpVoXEAEz1XL[1].jpg")
What's the fastest and most efficient way to learn the unit circle? Failed Trig because I didnt bother to memorize it all. Figured if I sat down and did whatever the best method was, I could get it like I did with my times tables.
1) Memorize the graphs. Sin(x) is an odd function which crosses the origin. Cos(x) is an even function, et cetera. Also, sin(n*x) and cos(n*x) are both periodic with a period of 2pi/n.
2) Okay, let's talk about the angles of 30, 45, 60, and 90 degrees.
sin 30 = 1/2 (the square root of 1 divided by 2)
sin 45 = sqrt 2 / 2 (notice: the square root of 2 > the square root of 1)
sin 60 = sqrt 3 / 2 (notice: the square root of 3 > the square root of 2)
sin 90 = 1 = sqrt 4 /2 (notice: the square root of 4 > the square root of 3)
Do you see...
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>>8083938
**correction: sin(x) actually decreases from 90 degrees to 270 degrees, and cos(x) is decreasing from 0 degrees to 180 degrees.
>>8083938
Ok thanks.
Got any youtube video suggestions to supplement this advice
Is this book worth picking up? I'm currently almost done with calc 2 and am interested in learning more about proofs. I haven't really done many at all before, but I have heard this book is a good introduction to them.
>>8083912
I thought it was pretty good as an intro to proofs, don't stick to the ideas as if they're gospel, but it helped me learn proofs.
>>8083912
It's excellent. Pick up Rudin's introductory text to accompany it so you can practice with real mathematics.
>>8083912
It exposes a lot of proofs by way of number theory. I found it boring and a bit dry. I didn't care to continually prove useless number theoretic results early on and lost interest. Also the proofs are just tedious and boring. I'd recommend discrete mathematics by epp or Rosen. It has a wide range of subjects and teaches proofs that'll help in higher level courses.
