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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

31 more posts in this thread. [Missing image file: mataa.png]
Why are germans so intelligent and hard working? Is it genetics? What's the deal? Germany is one of the most well-living country in the world despite the wars.
1 more posts in this thread. [Missing image file: question.png]
Hi /sci/, can you help me understand how to solve this problem? 1) Find vA 2) Find the incremental change in vA for a 2% increase in vI and use it to calculate the ratio ?vA?vI 3) Find the value for the incremental resistance of the nonlinear element N by linearizing the expression for iA about the operating point when vI=5.0V
6 more posts in this thread. [Missing image file: Goldbach_partitions_of_the_even_int(...).png]
I have a question: Why isn't Goldbach's conjecture proven by "Proof by exhaustion"? http://en.wikipedia.org/wiki/Goldbach%27s_conjecture http://en.wikipedia.org/wiki/Proof_by_exhaustion
17 more posts in this thread. [Missing image file: 00000183.jpg]
would anyone like to help me translate this paper? I was thinking of setting up one of those free wikis

Giant squid caught on camera

6 more posts in this thread. [Missing image file: squid1.jpg]
http://www.reuters.com/article/2013/01/08/us-japan-giantsquid-idUSBRE90705O20130108
12 more posts in this thread. [Missing image file: drug-tolerance.jpg]
this post is going to seem vague because i am just not that smart question: when you take drugs, your body slowly builds a tolerance up to the drugs and they slowly stop working right? or what exactly happens? for example when you take illicit drugs you never reach the same high you had before or the first time so does this mean that over time the body naturally returns to an equilibrium no matter what foreign drugs are introduced into the body? another example would be SSRI's and how they change your rewards passageway or ADHD medications that stimulate you but sooner or later the effects are not noticeable if the dosage does not constantly increase, is that correct? sorry for my ignorance pic could be related idk seemed interesting when i googled drug tolerance
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.
11 more posts in this thread. [Missing image file: ts09-2-1500.jpg]
Not sure where to post this for starters, but here goes. My folks bought me a Celestron Astromaster 114 for the holidays, I am an amateur stargazer and they thought it was something I could use. I was very much overwhelmed as I've never own a Telescope before, but super excited to try it out. Got around to assembling it over the weekend, and not only do I not know how to operate it there seems to be a problem with it's balance. I checked and rechecked if I assembled it right, also tried screwing and unscrewing the joint to verify it wasn't too tight but to no avail. How into telescopes?
17 more posts in this thread. [Missing image file: correct.png]
This is right..?

Battery voltages

2 more posts in this thread. [Missing image file: 1350428042655.jpg]
If i have a 5V battery and charge it with a 4.5V or 5.5V, would this have any negative effect on the battery? Assuming it does, why?

Science of NDE

7 more posts in this thread. [Missing image file: neardeathexperience.jpg]
Reading about Near Death Experiences gives me hope in the afterlife. Although the idea that makes the most sense to me about death is that our consciousness is released and we exist only on an informational level, are at peace with the world, that our minds expand beyond our body so that we can not clearly piece together we are dead or even existed, and plunge into an eternal sleep, I am afraid of that experience and hope I can rest with my family in the future and preserve my memories and live on, with no pain, and just happiness... Life scares me, /sci/. (I am of no particular religion, I don't know what to believe except what makes most sense. But I do love others greatly, and want to be with my family and friends forever. As much as the knowing I WILL be gone from this world and in 100 years everyone around me that I knew so well will be too, I wish to understand everything and live on with them in peace.) What are your thoughts on life and death, and your opinions on whether NDE's are bullshit or not? I'm here to talk philosophy with y'all. I post this is /sci/ because I started reading on the Scientific study of NDE's and wanted to know what other's POV's are. Has anyone here had a NDE they'd like to share? I'm really curious. Can't find many people to talk about this too.
7 more posts in this thread. [Missing image file: 1305483210060.jpg]
Sophomore studying pure math here, confused on what to do with my summer. Besides REU's is there any internships or jobs you suggest I apply to that are math related? I just want something that might look nice as an experience on my otherwise unimpressive resume.

Losing motivation

0 more posts in this thread. [Missing image file: iq_bell_curve1.gif]
The most difficult thing to accept is being mediocre and average. I lost my shit when I read about a 12-year-old who taught himself calculus, algebra, geometry, and trigonometry in a week. I feel like anything I try to do is being done at many times the speed and ease by many other people. Does anyone have any advice? Fuck genetics.

Since /sci/ is a shithole

14 more posts in this thread. [Missing image file: 1332270900524.jpg]
and we haven't had this stupid ass debate in awhile: What is the best calculus book ever?
36 more posts in this thread. [Missing image file: anonymous.jpg]
If every post on 4chan had an image of the posters face, how would this influence communication?

help : multiple variable equation solving

9 more posts in this thread. [Missing image file: Sans titre.png]
Hello /sci, I need your help on something. I'm trying to use wolframalpha to solve a 6 variable equation. It doenst seem to work. Does anyone know a good site to do this on ? Thank you so much ! PS : Here it is 1797*a+899*b+2696*g=0 ; 1797*b+899*a+2696*g=3 ; 1652*b+826*c+583*f=-3 ; 1652*c+826*b+583*f=147580 ; 1652*d+826*b-583*f=147580 ; 1652*c+826*d-583*f=295163 PS2 : Me and my friend are working on the displacement field of a beam.
12 more posts in this thread. [Missing image file: dfw.gif]
if prime numbers can be easily guessed with stuff like the ulam spiral, why do people still think RSA is secure?
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?
28 more posts in this thread. [Missing image file: Chinese room experiment.jpg]
I've been thinking about the Chinese Room experiment for a while, and there is something that sprung to mind, it's probably wrong, but I wanted to know what /sci/ thinks. Atoms and molecules act in the same way as the man inside the room does, they receive stimuli, and due to the laws of physics, an effect occurs. We are conscious beings, but our building blocks are not, meaning that the man inside the room might not be "conscious", but enough of them compounded with each other could produce something that is. Does this make any sense?
8 more posts in this thread. [Missing image file: light-virus-1.jpg]
Is anybody else fascinated by microbiology? I've always had an interest in virology and I'm seriously considering a major in microbiology.






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