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/sci/ Science & Math

Threads added between 2013/01/02 and 2013/01/09

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Most viewed threads in this category

59 more posts in this thread. [Missing image file: armageddon rejected ending.gif]
OK guys, you're the smartest board on 4chan, right? Basically the least retardd kid on the short bus, yes? Let's put that brainpower to use in a hypothetical scenario. A Hollywood-brand asteroid is on its way to the Earth. It's big. Big enough to kill everyone. Big enough to make Earth look like that satellite of Saturn whose name escapes me right now. You know the one, with the crater that spans like half its diameter? Yeah, that's gonna be Earth after this thing hits. Fortunately, unlike most Hollywood asteroids, it's not that hard for us to see this several-hundred-kilometer chunk of stone flying at us. Our telescopes pick up on it, we calculate its size and its path, and we narrow down the date: It hits on New Year's Eve, 2099. You're the smartest scientists in the world. You have 86 years and every last penny in America and beyond to figure out a solution. What do you do? Do you build a ship and get as many living things off-planet as possible? Do you try and construct some kind of super-weapon that can destroy the asteroid? Or do you try a more radical approach? HARD MODE: Replace the asteroid with a supernova if 86 years is too easy to build a giant rock-breaking weapon in.

CUDA programmers get in here!

0 more posts in this thread. [Missing image file: ankle bone.png]
what kind of things are you working on with CUDA? image: reconstruction of an ankle bone (not my work, but comes from researchers at U. of Washington).
3 more posts in this thread. [Missing image file: Eigenvectors.png]
Can someone please explain why the eigenvector of eigenvalue 1 is [-1,1] rather than [1,-1]? (According to WolframAlpha anyway) The characteristic equation is x + y = 0, so surely both those eigenvectors are valid?
199 more posts in this thread. [Missing image file: 13746242.jpg]
Have you ever had to study anything so obvious that you could have easily figured out by your own in a matter of minutes or seconds? I have three: Bolzano's theorem. Rolle's theorem. Mean value theorem. I am baffled at how stunningly easy these theorems are and yet Bolzano and Rolle immediately get their names stamped in History for it. Not that they weren't great in mathematics but still... Anyone ever felt similar?

noko

0 more posts in this thread. [Missing image file: Untitled.png]
>got super bored >read Collatz conjecture >made program >ruining my internet speed. >CPU is screaming
2 more posts in this thread. [Missing image file: 155287959.jpg]
This is a really bad book. I wanted to learn algebra because I am mathematically retarded so i read half way through this book and now I don't even know what to do. The book doesn't explain how to do the problems at the end of the chapter or anything. Is there a better beginner algebra book than this?

Ghadlawd

1 more posts in this thread. [Missing image file: 20204_abstract_green.jpg]
asdasd
0 more posts in this thread. [Missing image file: paraview100.png]
Does anyone have experience with python scripts for ParaView?
1 more posts in this thread. [Missing image file: banana gets owned.gif]
why do people find it hard to leave 4chan?
7 more posts in this thread. [Missing image file: 020120903053056.jpg]
So I was just thinking, once again, why does anything exist at all, where did everything come from, and so on.. The questions of course seem impossible to answer. You get answers like "time is cyclical" or "because it just exists for no specific reason" but to be honest I was jsut as confused as before after hearing those. And then I realized the answer. I believe in science, and I fully believe science can explain the universe. I cannot imagine the mind blowing things we discover, but I can imagine science ever answering the question "where did everything come from?". That is the moment I realized it's the one question science cannot answer, and at the same time I also realized the answer to that question. I would say "in the beginning", or "before our universe existed" but that would assume existance of time. So I will just say there wasn't anything. And I mean ANYTHING. Not just particles, I mean state of complete inexistance. Laws of physics didn't apply, in fact there were no laws. Causality didn't exist, logic didn't exist. And there is your answer, it seems so obvious to me now. If there is NOTHING, then there can be ANYTHING. This is not me trying to be lolsodeep, I think it should be obvious to anyone if you give it a little thought. Thank god (heh) I won't have to think of this question ever again.
42 more posts in this thread. [Missing image file: quantum_teleportation.png]
So if there was a working teleporter, would you dare to use it? http://en.wikipedia.org/wiki/Ship_of_Theseus
5 more posts in this thread. [Missing image file: 1357474112161.gif]
Recommendations for Physics textbook. (Undergraduate)

PISA Test

12 more posts in this thread. [Missing image file: PISA.png]
I posted this on other boards. Let's see how conclude here. http://www.oecd.org/pisa/ http://pearsonfoundation.org/oecd/
2 more posts in this thread. [Missing image file: the-it-crowd-s2e1-20081218145040-0_(...).jpg]
So, eventually we will recreate everything, and then what?
3 more posts in this thread. [Missing image file: mangled frontal lobe.jpg]
How to enjoy games as much as you did when you were 10: <--- Smash yourself over the head with this. Enjoy enjoying games as much as you did when you were 10.
4 more posts in this thread. [Missing image file: 10dims.png]
2013 ready for an epic mind blow? >Imagining 10 Dimensions - the Movie I guarantee impress: http://www.youtube.com/watch?v=gg85IH3vghA
3 more posts in this thread. [Missing image file: uguu34t.jpg]
Is there any hard proof that transsexualism is a neurological condition and not a psychological condition like they claim?
3 more posts in this thread. [Missing image file: bdw.png]
11 more posts in this thread. [Missing image file: 305px-Cauchy_sequence_illustration2.svg.png]
Could one of you explain to me how I can figure out wheter an infinte sequence convergent?
3 more posts in this thread. [Missing image file: images.jpg]
x^2 - 16x + 64 = 0 Find the value of the discriminant Describe the number and type of roots Find the exact solutions by using the Quadratic Formula please do this and tell me how you did it






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