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/sci/ Science & Math

Threads added between 2014/01/08 and 2014/01/15

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Most viewed threads in this category


42 more posts in this thread. [Missing image file: F11.large.jpg]
Ask a current grad student at a top 5 geo. program anything.
5 more posts in this thread. [Missing image file: numbers-0-9[1].jpg]
Hi /sci/ I have some number sequences that I can't figure out. Maybe you can help. A) 135, 791, ?, 151 B) 138, 257, ?, 132 C) 24, 16, 25, 66, ?, 36
1 more posts in this thread. [Missing image file: northern lights.jpg]
Does anybody know how long this is going to last? I'm in Saginaw, MI and I don't see anything yet, and it's almost daylight. I'm hoping it'll stick around until later tonight so I can see my first and probably last northern lights.
12 more posts in this thread. [Missing image file: 250.jpg]
Do we have scientific evidence that mathematics exists? I hear from people that the universe is governed by mathematics and this expression doesn't seem right. It almost sounds as if the universe came up with mathematics.

Why does this happen to me?

0 more posts in this thread. [Missing image file: image.jpg]
Damn. I just had a moment of clarity about what I believed to be the universe but now that I have gone to type it in /sci/ i have forgotten it. Fuck.
1 more posts in this thread. [Missing image file: 11076637544_3e1fa39fed.jpg]
How does the reverse pyramid boarding strategy for airlines work?
4 more posts in this thread. [Missing image file: 1533895_10203002081832560(...).jpg]
If You're so smart, why can't You name this bird?
11 more posts in this thread. [Missing image file: Embers_01.jpg]
What's the chemical difference between burning with a flame and just smouldering?

Characterizing Human Movement with the Wii Board

2 more posts in this thread. [Missing image file: wiiboard.jpg]
Dear /sci/, I am a masters student in physics currently studying in London and I am in need of some ideas with where to take my major project. The title I have been given is "Characterizing The Human Transfer Function With The Wii Balance Board". The Wii board/Wiimotes/etc. are hooked up via bluetooth to my laptop using some linux specific python libraries. ANYWAY... The project is extremely vague and has to justify 200-400 hours work or so. My supervisor said he is there to provide some guidance and the such but not to tell me what to do. tldr: Ideas for where I can take this?
4 more posts in this thread. [Missing image file: 1817927399_1385431416.gif]
Alright, smartasses, Explain breathing and photosynthesis.
10 more posts in this thread. [Missing image file: RICES.jpg]
Quick question /sci/ When you get a sports injury, medical personal say RICEs Isn't RICES detrimental? The human body naturally repairs itself by increasing blood flow. By Icing and compressing and elevating, your reducing blood flow. Isn't that detrimental?
5 more posts in this thread. [Missing image file: McGonagall.jpg]
what's a formal and basic introduction to ODEs? something that only assumes knowledge of single variable calculus and linear algebra and it's formal

The Existence of Whiteholes

22 more posts in this thread. [Missing image file: 3d1a43c1-0c12-43de-96e1-4(...).gif]
So I'm working on my senior research paper and unlike the rest of my classmates who chose boring and mundane topics, mine will be over the theoretical existence of Whiteholes (a blackhole's counterpart). I'd love to hear any insight /sci/ might be willing to share. This includes personal knowledge, links to books or pages, and possible Skype interviews if possible!

Special Relativity proven wrong

1 more posts in this thread. [Missing image file: borat.jpg]
In his book 'Relativity: The Special and General Theory', Einstein gives a seemingly simple and elegant derivation of the Lorentz transformation which goes as follows: he considers the 'equations of motion' of a light signal in the unprimed and primed frame (1) x-ct=0 (2) x'-ct'=0 and correspondingly for a light signal travelling along the negative x-axis: (1a) x+ct=0 (2a) x'+ct'=0 (note that Eqs.(1a) and (2a) are not written explicitly in Einstein's book (see here)). From these equations, he concludes then (3) x'-ct'= ?.(x-ct) (4) x'+ct'= ?.(x+ct) and by adding and subtracting Eqs.(3) and (4) he gets the formal Lorentz transformation (5a) x' = ax -bct (5b) ct' = act -bx where (6) a= (?+?)/2 (7) b= (?-?)/2 . Now it is obvious that the equations (1),(2) on the one hand and (1a),(2a) on the other are algebraically inconsistent unless the first set of equations is restricted to x,x'>0 in the first case and x,x'<0 in the second. So the generalized Eqs.(3) and (4) must then be restricted in the same sense in order not to violate the original constraint. But Einstein simply ignores this, and assumes that (3) and (4) hold both for positive and negative x,x' in order to be able to add and subtract the equations.
11 more posts in this thread. [Missing image file: 1x01-Winter-Is-Coming-tyr(...).jpg]
Is it possible for a planet to have season lengths that are variable as in the Game of Thrones series, or A Song of Ice and Fire? Like, have a winter that lasts a few (Earth) months followed by a few months of summer/autumn followed by a winter that lasts 5 years?

Everyday Problems

11 more posts in this thread. [Missing image file: 1378346741124.jpg]
Hey guys, post some every day problems for me to *attempt* to fix with an engineering solution. Kind of a hobby of mine, will post results if possible. Would prefer a rather "simple" every day problem, Cant cure world hunger or make a never ending beer. Thanks fellas
10 more posts in this thread. [Missing image file: Beethoven.jpg]
How would you compute the 1000th derivative of e^{x}sin(x)
13 more posts in this thread. [Missing image file: GBvFMYV.jpg]
Why the domain of definition of this function ln(x+?(x2+1)) is R? I can't figure it out :/
38 more posts in this thread. [Missing image file: 5ba12f4158ade0f362147248b(...).jpg]
What are your thoughts on this picture. I'm sure many of you may think it's a hoax. But here's a few facts to date. >Nine or ten ribs instead of the 12 that is found in a healthy human skeleton >DNA is 94% human >Bones contain millimetre sized holes consistent with arteries fuelling bone marrow. This suggests that if it was a hoax, it was performed by the best micro-surgeon in the world >"The X-Ray and CT scan show an intact, actual biological humanoid organism, without question. Astonishing 3-D images were able to be constructed of the body from the detailed CT scan, and we were able to see internal organs such as lungs and what I am fairly sure is a heart structure" >"I can say with absolute certainty that it is not a monkey. It is human -- closer to human than chimpanzees. It lived to the age of six to eight. Obviously, it was breathing, it was eating, it was metabolizing. It calls into question how big the thing might have been when it was born" So, what is /sci/'s thoughts? Deformed human or first alien corpse which the governments couldn't take control of?
11 more posts in this thread. [Missing image file: Leukemia.jpg]
So riddle me this /sci/ If leukemia kills you by eventually thickening your blood to the point of no return, why can't we filter patients blood somehow? Like with kidney failure and dialysis? >inb4 I just cured leukemia

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