/sci/ - Science & Math

>>5841567
you need to ask?

Visual Studio. Seriously. If you're a student you can get it free from Microsoft's "Dreamspark" program (or y'know, torrents). Everything else is clunky bullshit written by neckbeard amateurs who have a compulsive, irrational hatred of Microsoft.

OTOH if you use Mac or Ubuntu, well, enjoy your fail.

http://www.youtube.com/watch?v=q1LCVknKUJ4

http://www.youtube.com/watch?src_vid=q1LCVknKUJ4&annotation_id=annotation_178448&feature=iv&
amp;v=_cKj3kx4NTY

I think these videos could've been made a lot better by a simple omission of ridiculous music, but is still a thought-provoking watch.

What does /sci/ think of the Mpemba effect?

The outcome of experiments varies as much as the ones examing telekinesis, but at some level it makes sense. Thermodynamically, and conventionally, the liquid would simply reach equilibrium. Still, on some level it makes sense. It's a curious thing.

http://en.wikipedia.org/wiki/Mpemba_effect

Not a homework thread.

Okay, so I'm trying to figure out how many ways there are to break 20 objects into 4 groups of 5.

My reasoning is that for the first group, there are 20 choose 5, for the second 15 choose 5, and for the third 10 choose 5. Then only 1 possibility for the last class.

So the total number should just be the product of these.

I just feel like this is wrong, since that's about 11 billion combinations, which would take a heck of a long time to compute.

Fuck it - I say we fight for what this board used to be, or at least, if only for one night, recapture that old glory!


Here's my challenge to you /sci/:

For the rest of the evening - no homework threads, no hurr durr engineers are queers bullshit, no paranormal crap, no politics, none of that shit.

Just intriguing, thought-provoking scientific discussion.


/sci/ was great! Let's make it great again.

Any lab techs on /sci/?

I've been applying for bio lab jobs since I graduated in May and finally got a callback for one of them. Had a phone interview a couple weeks ago which went well and I've got a face-to-face interview tomorrow. What I'm wondering though is what could the second interview possibly cover? The first one was already all about my previous work experience, I really don't think there's any more they could ask me about that. I suppose the second interview would focus on personality and work ethic, but the only questions I can come up with that might be asked are the "what's your greatest strength/weakness" ones.

Any techs mind sharing their experiences with these interviews? Obviously every lab is different but I'd imagine most labs conduct them in similar ways.

Oh yeah, this is for a neuroscience lab.

You now realise that /sci/ is a very popular board and many people take everything said on it as truth.

Hey /sci/, I was reading this article about CERN's speed of light findings getting confirmed by another experiment (http://www.bbc.co.uk/news/science-environment-15791236)), and I now I'm feeling a bit indignant. You see, two years ago in my second semester introductory trig-based physics lab one of our labs was to experimentally confirm the speed of light. Well, long story short, I came up with an answer that was slightly higher than the real speed of light. My SEM was only 12%, yet my lab instructor gave me a "C" on that lab.

Anyway, there's no use whining about that now because I can't change my grade after this long, but I was wondering how I can seek out credit for this discovery seeing as how I was the first one who made it. I still have my lab notebook and all the worksheets and everything too, so I can prove I carried out the experiment.

Does anyone have that image showing the effect of nature versus nurture on the various parts of the brain?

It shows how each part was a certain percentage similar between different humans, while others were altered during life.

I thought I saved it, but I can't find it now. Just to get a quick look at which parts of the brain are on factory settings and which have personal settings for a short story.

>>3307219
Cool simulation of impact video to get the thread going in the right direction again?

I'm sure many of you already know it, is the video accurate?

>Beware the Believers
http://www.youtube.com/watch?v=eaGgpGLxLQw
I know, it was made by creationists... but it's AWESOME!

Let's take this dumbass out.
BLOOD FOR THE BLOOD GOD! SKULLS FOR THE SKULL THRONE!

http://www.cnn.com/2011/US/05/17/education.stem.graduation/index.html

What are /sci/'s thoughts on this?

Personally I love reading stuff like this. The last thing scientists need is even more competition, at least in academia. Really, I don't even know why people are saying that we graduate too few science majors. More scientists get PhDs every year than there are available academic positions. How is that a shortage? Nevermind the abysmally low acceptance rates for grad schools in the first place where you never see more than a 10% acceptance rate even at the shittiest schools. So already we've got far more than enough bachelor's holders. And it's not like you can really do anything with a bachelor's degree in science either, other than be a lab tech, engineering being the exception.

I have two important questions about Rossi's reactor:

- Can it run on regular nickel, or does it require enriched nickel with a higher proportion of Ni-62 and Ni-64?
- If we built enough of these to satisfy worldwide energy use, would we have enough nickel to fuel them?

I believe it requires enriched nickel. Enriching nickel requires a lot of energy, making this less attractive as an energy source. More importantly, it limits the fuel available for the reactor, since Ni-62 and Ni-64 are both rare isotopes.

I do not believe we have enough nickel to make these a viable source of energy worldwide. We just don't have that much nickel, much less than coal for example. Although the fusion reaction produces more energy than burning coal, it's not THAT much more. Nickel-hydrogen fusion is nowhere near as energetic as hydrogen-hydrogen fusion, or uranium/plutonium fission.

Good, let this be a lesson to you both. Keep /sci/ religion-free!

YOU MAY BE A /SCI/DUCK IF:

-You see the word "amidoinitrite" and your brain immediately breaks it up into amido-i-nitrite.
-You know that diamond is the hardest metal known to mankind.
-You can identify a homework thread on sight.

Gender is biological

Gender roles are not

/thread

What's the appropriate pulse rate to donate blood? Like which rate is too low and which is too high to give blood?

I can't find any information on Google about this. :(

I want a degree in something psychology, neuro science, biochemistry, or bioengineering related. What would /sci/ recommend? Going to UTSA, getting my gpa up, and transferring to UT. I will gladly transfer if needed. I just dont want to be a pencil jockey, and I actually want to be able to find a career. Research only brought up contradicting results. I would like to make roughly 50k, live in or near a nice city(not Houston or San Antonio) and not be working 80 hour weeks.

I was thinking PharmD sounds great with great pay and little schooling, but sounds incredulously boring to be in a CVS pharmacy all day

Hi there /sci/entists, it's math time.

To make it short, I've come across a problem that seems terribly simple at first, but I just couldnt solve it no matter what I did.

Let <div class="math"> x=(x_1,...,x_n) \in \mathbb{R}^n </div>
Prove:
<div class="math"> (\sum_{j=1}^{n}|x_j|)^2 \leq n\sum_{j=1}^{n}x_j^2 </div>

So I'm reading a neuropharmacology paper right now (Kimmel et al. 2009 if anyone cares). Their methods involve the use of a fixed-interval stimulus termination procedure as a means to test locomotor behavior. The gist of the test is that the monkey gets shocked if it doesn't press a lever within 300 seconds of a light turning on. Thing is, that seems more like an anxiety test than a locomotor test.

I'm not familiar with pharmacological research methodology. Does anyone know if this test is valid for use in this context, or am I correct in assuming that it's supposed to be used as an anxiety test? I've tried looking it up on google scholar but unsurprisingly I'm not really finding anything useful.

>>1544611
Unfortunately, the private industry is depending on financial aid and incentives through the COTS program to help fund their initial development, and to provide an initial client when their spacecraft are up and running.

You think COTS will continue operating if the commercial development budget is cut from $6 bil to $250 mil? Fuck no. COTS would be shut down and commercial spaceflight would die.

I'm writing an email to my representative right now.