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/sci/ Science & Math

Threads added between 2013/08/07 and 2013/08/14

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Most viewed threads in this category

2 more posts in this thread. [Missing image file: Bluehound.gif]
Does anyone know the book "Optimization over Integers"? Is it available as a pdf somewhere?
79 more posts in this thread. [Missing image file: images.jpg]
what's the best adderall alternative that's legal without prescription? adrafinil? noopept? piracetam? come on /sci/
0 more posts in this thread. [Missing image file: conscious-machine_cp3hb_2263_thumb.jpg]
Lucid dreaming thread, /sci/?

Are you with us or against us Deniers?

16 more posts in this thread. [Missing image file: A-SHORT-HISTORY-OF-AMERICA-.jpg]
Time to decide after 4 decades of research. Either 1. The planet is going to heat up to truly unlivable temperatures, and change globally and irreversibly, or 2. Its not. One choice has all the momentum of 40 years of research behind it. Go ahead, crack open any scientific journal, any one, and see this validated. /Sci/ <----- ------> NOT /sci/ Which? I thought so. 4chan needs a new board= /notsci/ Go there and never come back
16 more posts in this thread. [Missing image file: 1375483755866.jpg]
What the fuck are tensors?
50 more posts in this thread. [Missing image file: gurdon_postcard.jpg]
Which science is harder: biology or particle physics?
48 more posts in this thread. [Missing image file: Observable_universe_logarithmic_ill(...).png]
What lies beyond the universe /sci/? Since it has been said that it is expanding, then the universe is expanding into what? Is the universe making new spaces as it expands?
156 more posts in this thread. [Missing image file: WZ_Erwin_Schr%C3%B6dinger[1].jpg]
>yfw casuals are acting like they knew who the fuck Schrödinger was before google put his cartoon up today
24 more posts in this thread. [Missing image file: ERt9ACR.gif]
The other day I accidentally wrote a number theory problem that nobody I know can solve. Can you guys solve it please? Find all integers a, b such that a^2+b^2 is a square (pythagorean triple) and that (a^2+1)/(2a^2+2) is the square of a rational number (eg. 4/9, 8/18, 1/25 etc.) pic unrelated I would be so grateful if you could solve this.
215 more posts in this thread. [Missing image file: image.jpg]
What does /sci/ think about this? >http://www.youtube.com/watch?v=AzE_IHGUssY Apperently, the Egyptians couldn't have built the great pyramid using their technology. It also shows the mathematical beauty of it(pi and the golden ratio appear often), which is contradictory to our current beliefs about Egyptian mathamatics. Also, they somehow knew the meter and were able to make perfectly symmetrical faces on statues using rocks and chisels. I just want an engineers perspective of this.

Solar system

8 more posts in this thread. [Missing image file: Space-Art-Wallpaper-space-7076586-1(...).jpg]
Hi /sci/. I'm writing a novel which includes highly modified Sol. Sun is 14% lighter, Moon's (52% lighter) orbit is circular perpendicular to the line between Sun and Earth and Jupiter, its year is as usual 28 days. Earth orbit is circular and it's in L1 Lagrangian point of Sun-Jupiter (kept stable). I tried to make a program that predicted when the Moon is visible, but it turned out quite complicated. Are there any tools to do it easier? Any tips, at least?

Babby problems

8 more posts in this thread. [Missing image file: 550x486xgtfo-im-doing-science-naked(...).jpg]
p-please help /sci/ I'm struggling with a few differential equations questions and would greatly appreciate some guidance. So i'm trying to find equations in terms of Q dQ/dt=(m-n)Q , m=0.1, n=0.06, Fairly certain I ended up with the right thing Q=200e^t/25 My actual trouble was with the DE: dQ/dt=(m-n-kQ)Q , m=0.1, n=0.06, k= positive constant Any points in the right direction would be greatly appreciate. And yes, I already know this is sub-babby tier.
14 more posts in this thread. [Missing image file: Hairstyles_for_Balding_Men_4.gif]
What can be done for it? I hear taking DHT suppressors works/slows it down.
4 more posts in this thread. [Missing image file: Planck2.jpg]
Which scientist do you believe has the classiest glasses and has made significant scientific contributions to STEM pursuits? >pic related My nigga Planck.

incredible stupid question

4 more posts in this thread. [Missing image file: sin.png]
if you move the point M along the AC line, then the lengths of BM and MA changes, which means that sin, cos, and tan of angle A also changes, even if the angle A is the same all time. I feel like an idiot now for not understanding what's wrong.

Some spaceflight news

8 more posts in this thread. [Missing image file: grasshopper_day.jpg]
http://www.youtube.com/watch?feature=player_embedded&v=2t15vP1PyoA Maneuverability is the them for this video.
15 more posts in this thread. [Missing image file: 12386361-high-tension-line[1].jpg]
can high-tension lines cause cancer?
15 more posts in this thread. [Missing image file: Capture.png]
How do you deal with this shit /sci/, people who say the earth is young
1 more posts in this thread. [Missing image file: sqc.png]
How would you solve this ?
48 more posts in this thread. [Missing image file: polynomialrootssmall.png]
I saw a thread like this the other day and it looked pretty fun. Ask a soon-to-be pure math PhD student anything and I'll try to answer.






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