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/sci/ Science & Math

Threads added between 2013/02/16 16:00 and 2013/02/16 22:00

25 more posts in this thread. [Missing image file: wtf.jpg]
how smart does this make you feel , scientists?!? > http://www.youtube.com/watch?v=w2xzIgdD_XA
20 more posts in this thread. [Missing image file: going_back_for_phd.png]
So I saw a post about a guy who had B.Sc. in engineering and a masters degree several days on /Sci/ and he said that he was having troubles on getting a job due shit things like "7 years experience in laser cuttings". Here's my dilemma: I had a B.Sc. in engineering, I'm finishing my Masters on Engineering and I was loooking to run a PhD since I saw that post and investigated if pursue PhD has rewards. But what I found just gave me chills: There's no reward due current economic crisis. So, could you please give an advice /Sci/entists? Do you have similar experience? Thanks in advance.
15 more posts in this thread. [Missing image file: nasalogo_twitter.jpg]
What can be done to get NASA more funding? I think what NASA needs are a couple of badass marketing people putting out a lot of awareness on the subjects they tackle. NASA's funding is fucked because nobody but a handful of people from the human race give a shit about it. To most people, it's fucking boring. It's not "WHOA, SO MASSIVE, SO MAJESTIC", it's just a fucking backdrop. A big floating JPEG in the sky, no different that the one in <insert random vidyagaem>. NASA needs a team of hip niggas to make space fucking cool again to the general public. This will result in more interest and therefore more funding.
15 more posts in this thread. [Missing image file: sadfrog.jpg]
>That feel when you think your bio and stats tests raped your ass, but you avenged your anus and violently sodomized your physiology II and chem II tests
8 more posts in this thread. [Missing image file: bed hammock tension.png]
I'm building a suspended twin bed with hammock like elements. The structure goes between two trees and is make of chain (red) and metal (black). I've didn't take physics in high school, and was wondering if you would tell me if my math is correct. I'm assuming 1000lbs is a safe working load for two people in a bed.
11 more posts in this thread. [Missing image file: a0sgwAZ.png]
/sci/ I've not been able to find much information about n,n-dimethyltryptophan, so my question for it's production is this: could one either preform a Mannich or Eschweiler-Clarke on tryptophan without the worry of pictet cyclization? It seems if this were possible, one could essentially decarboxylate as they would with any alpha-amino acid to obtain the indicated tertiary indolic ethylamine, no?
89 more posts in this thread. [Missing image file: Untitled.png]
Bonus if you can do it geometrically.
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If x > y, and z > y, prove that x > z.
50 more posts in this thread. [Missing image file: 1351980275249.jpg]
http://www.raventest.net/ is this the actual progressive matrices IQ test or some scam? what do you think of IQ tests in general?

Low blood pressure, exercise and salt

21 more posts in this thread. [Missing image file: hl4.png]
A doctor has recently checked my blood pressure and said it was "low, however still in normal boundaries". I googled around a bit and found that this can be quite dangerous for the brain, because the heart gets to pump less oxygen to it. I can't bare with the concept of gradually becoming a retard (paraphrasing here), and I'd like to do something about that. wat do I've been sitting in front of a monitor most of my days for a few years now, as I'm a programmer. Should I exercise? How? Is jogging good enough, because I don't really have the time to go to the gym... Also, what about salt? It can increase blood pressure. Is eating salty popcorn once a week a good thing? Please help /sci/, I'm freaking out here.
26 more posts in this thread. [Missing image file: aaaaaaa.png]
Dear brainiacs of /sci/, I came to you today with a question. I assure you it's not homework, it's just something I came up with while stoned and I know fuck all about electricity so I hoped someone here could shed some light on this mystery for me. Let's cut to the chase: If you take a look at pic related, you see I've drawn a flashlight on top of some kind of charging device. The idea now is: Would it be possible (assuming the flashlight has rechargable batteries) for the recharging "poles" of the flashlight to be outside? As in, the handle _is_ the poles? Granted there's some kind of rubber between the both of them? >Would this work? y/n? Would it be dangerous? If anyone can help I'm forever grateful
1 more posts in this thread. [Missing image file: custom hue.jpg]
I hear surrounding a wire there is a positive electric field surrounding it proportional to voltage, the higher the voltage the more electron "holes" creating a positive charge. I also hear if there is a negative voltage there is a negative electric field, I do not understand this, is this even correct? Is the voltage (and therefore electric field) proportional to the ground? Does it go e.g. 12 volts at one terminal, 0 at ground, -12 volts at other terminal and positive electric field at one terminal, no field at ground and then a negative electric field at the other terminal? What terminal's side has a negative charge, (obviously) the negative terminal right? But is voltage positive or negative at the negative terminal? Help.
3 more posts in this thread. [Missing image file: images (9).jpg]
Modern humans can't cope with the pace of technology, and that is why they are confused about the concept of transhumanism, which is ironically their only remedy. As poorly evolved primates, they lack the necessary external biological properties needed to be compatible with a world which is predicated on formula, geometry and artificiality. The understood five senses also fail to locate harmony within the electromagnetic hegemony on earth as manifested through engineered design. This has led to their arrested state and apparent stress. The future can be discussed only within the context of technology. As such, the reality of transhumanism, which is complex and an altogether different paradigm, is an important and logical debate. Creative reminder : https://www.youtube.com/watch?v=HBO73pBGtlo&list=PL0s5Vof73FfA8MadMhb5sA7dmMkfJYo4h&index=5

Hacking/Programming/Networks

6 more posts in this thread. [Missing image file: 1358066334581.jpg]
What resources should I use to become better with computers? I'm a beginner with C++, and I have some Linux command line experience.
3 more posts in this thread. [Missing image file: 2940-lana_del_rey1.jpg]
quick questions, Would treating my jeans or denim fabrics with amylase make it softer or harder. I know for fact what amylase does, it breaks down starch into sugar monomers... but i don't know what result that would produce in denim....
5 more posts in this thread. [Missing image file: windmill.jpg]
Car alternator on a flagpole with a big ass fan blade where the pulley should be. Is there anything enormously wrong with this idea, or can I rig up my own windmill to help power my home? My wife is down with the idea.
4 more posts in this thread. [Missing image file: mit1.jpg]
Does MIT offer any algebra classes? Like the algebra you take in high school, not that wierd "Abstract" stuff (WTF is those symbols used for)? I live in Boston so I'm looking to take some classes. I graduated high school easily but didn't pass the first algebra class I took. I heard MIT explains things simply, so I asked about the MIT thing. Please help?
7 more posts in this thread. [Missing image file: 1089.png]
Prove it.
10 more posts in this thread. [Missing image file: 1359384049094.jpg]
Anyone else think within 150 years we will have something similar to the omnitool and floating display screens as seen in the mass effect series?

HOMEWORK HELP

6 more posts in this thread. [Missing image file: sparkly-dots.jpg]
Missed this last week of Evolutionary Biology (first semester in college) with the flu and just need someone to help me out with this study guide problem I came across. The fact of the matter is, my basic biology and genetics from high school are rusty as anything and I'm still playing a bit of catch-up in that regard. If someone could just walk me through this problem it would be an enormous help. "Using a diagram, show how 3 heterozygous loci, Aa, Cc, and Mm each on a different pair of homologous chromosomes (a total of 3 pairs), sort independently of each other during meiosis" And no, I don't know anybody in the class and the professor is a fucking dinosaur the checks his email about once a year.

resistance

8 more posts in this thread. [Missing image file: resist.png]
hey /sci/, i have pretty easy (i reckon) problem, but i can't find solution and similar things in my textbook. is there anyone to solve it?
11 more posts in this thread. [Missing image file: 0101010232312.jpg]
Sorry to bother you but can someone explain what happens in this picture? How do you integral that?

Da fuq issat??

5 more posts in this thread. [Missing image file: DSC00261.jpg]
Saw this tiny little thing crawling aimlessly on my book. It aint gonna eat my brains out when I sleep will it??? O: I got HD video I'm uploading of it if anyone wanna see for somereason :)
8 more posts in this thread. [Missing image file: Ramanujan.jpg]
Do you think we'll see more Ramanjans and Will Huntings in the near future?
5 more posts in this thread. [Missing image file: 5.8.png]
Hey /sci/ I've been working on this problem in a babby physics class and I checked the solution. I'm having trouble understanding how they adjusted their coordinate system to calculate their values.
2 more posts in this thread. [Missing image file: A.jpg]
Why did humans loose their hair when evolving?
2 more posts in this thread. [Missing image file: 2013-02-03 21.07.24.jpg]
I want to pursue my dream career and research quantum computing, AI or the brain, but my salary might crash in the shitter. If I want money, becoming an actuary is a suitable one because it's math. What do?
1 more posts in this thread. [Missing image file: 19383[1].jpg]
What this means ?x,t[(x?U)t??t'[t'>t??(x?U)t']]
10 more posts in this thread. [Missing image file: 2013-02-16 13.07.06.jpg]
Hey sci, I found this in a shed at my uncle's house. What the fuck us it?
15 more posts in this thread. [Missing image file: em_spectrum.jpg]
When light is a wave is it a transverse wave or a longitudal wave, also are waves of electrons and other particles transverse too? If all "quantum" waves are transverse how do they behave so drastically different from a particle, I don't get it.
0 more posts in this thread. [Missing image file: Untitled.png]
Where does the 6d1 come from? Why is not just [Rn]7s25f4?

Statista Premium Account

0 more posts in this thread. [Missing image file: statista_logo.jpg]
hey /sci/ I was wondering if anyone of you have a premium account to Statista I could borrow? Would really appreciate it since i need some statistics from there to school.
2 more posts in this thread. [Missing image file: data.jpg]
>babbys first cantor's diagonal argument are there more numbers between any two distinct real numbers than there are natural numbers? ie between 0.0000{lots of zeros}001 0.0000{lots of zeros}002 also is real analysis lots of cool shit like this or do they just start strong and then go onto proofs for mundane things.
7 more posts in this thread. [Missing image file: singularity.jpg]
>0/0=x >x=any number. >0/0=random >0=Source of all numbers
0 more posts in this thread. [Missing image file: m2863a.jpg]
Good Evening SCIentists. Geology, (and especially Stratigraphy, and historical geology) thread! All of the interesting informations about geology studies itself, and stuff about that kind of science - are welcome. mente et malleo
9 more posts in this thread. [Missing image file: Reddy2.png]
I fill a pot of tap water. I boil it all off I refill it Boil it again What chemicals/molecules would I have at the bottom of the end of 20 times? Also this is my OC
17 more posts in this thread. [Missing image file: 1267299448074.jpg]
Halp. I've forgotten my calculus. If \lim_{z\to z_0}f(z) = 4 and \lim_{z\to z_0}g(z) = 0 how do i evaluate \lim_{z\to z_0}\frac{f(z)}{g(z)} ? Am i allowed to use l'Hopital?
4 more posts in this thread. [Missing image file: moivre.png]
Hey /sci/. I'm stumped by what seems like a frustratingly simple question. Suppose we have some set of propositional variables and a boolen formula over those, \varphi. For every variable p we know the probability that it is true, P(\nu\models p). Is there a polynomial time algorithm to determine P(\nu\models\varphi)? My first approach was to just translate logical conjunction into event conjunction, but that clearly fails: if P(\nu\models p)=0.5 then P(\nu\models p\wedge p)=0.5, and not P(\nu\models p)P(\nu\models p)=0.25. The problem is that clearly p is not independent from p, but I'm unsure if we can keep track of all these dependencies in polynomial time.
2 more posts in this thread. [Missing image file: 1336535309829.jpg]
Is the mathematical truth 1+1=2 analogous to the conservation of energy? They seem to express the same concept in different fields.
4 more posts in this thread. [Missing image file: 1335581111333.jpg]
Do we get elements from other elements ? Somebody said they believed the world was visited by aliens and they made slavs of us and then amde us mine gold for them then they leave us to grow into what we no as humanity today. I said it would be easier for them to make the gold if they can make space ships and travel thru space,and i said that we make elements from other elements all the time,i even said the sun takes elements and changes them and bombards us all the time with the new elements. i got the answer back off a self proclaimed astro- no it all scientist geologist brain box ---we need the power of a star to do this and its not so common on earth--i cited the hadron colider as making diffrent elemenst from the 1s it used.i even put plutonium 238 and the break down of it as it goes back to lead. whose right?






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