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/sci/ Science & Math

Threads added between 2013/06/26 and 2013/07/03

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Most viewed threads in this category

2 more posts in this thread. [Missing image file: 500px-UK_taxes.svg.png]
>inb4 econmics question, pleb tier I don't care about your opinios on economic stuff, just about the logic of the question and my conclusion, so don't come up with any ideology pls, just because you thing it's best, just facts hey /sci/, I have one question about one conclusion I had today and want to know if my conclusion is flawed? Ok, first of >I was thinking about taxes today. >Had the thought that taxes the concept of taxes is over 2k or even more years old. >Thought about the fact if they already had the possibility to make debts. > Rather unimportant as they could have forced people to do things till the late 2nd millennium of our time calculation. > Think about the fact that if they had no debts back then, they never thought about that problem when they came up with the concept of taxes > Think about the fact that every country in the world beside 1-2 have huge debts. > Think about the question why. > Why don't we just pay the costs that the country has over the year with real money from real people all the time. Percentual of what people gained in that time on demand. Now you may argue that is what we do now, just every year, and not in shorter time windows, but we don't do that in fact, because this concept leaves no room for debt, as all costs are payed to with money, not with partialy lended money. > The state should do something that is in the interest of most people so it should be worth it. > Think about the fact that people argue that the state has to make debts to let the economy grow or rather to make it growing when it is not. My conclusion was: > So in fact liberals can't be really right, because without the state helping with money to move the economy into the right direction the economy doesn't work. >inb4 ignore money that is spend on unarguably valuable things, like infrastructure and other things that are unarguably the task of the county/goverment. Just the money that is spend into economical thing by countries
47 more posts in this thread. [Missing image file: image.jpg]
I am having a hard time understanding this diagram. I understand the it represents electric field strength, magnetic field strength, and direction, but I just can't visualize how it relates to the physical reality of radio waves propagating (in all directions) from a tower, or visible light from a lamp. Like, where are the fields?
2 more posts in this thread. [Missing image file: wallpaper-104359.jpg]
Hello /sci/ I am having a bit of trouble using the ti-84. Not that the calculator has any problems, I just don't know how to input the data. How can a graph an equation; for example (150+x/6+34000/x) when I must also restrict the domain and the range. 0<x<1000 0<y<1000. Can't find any way to do it. The problem says it has to be done with a graphing utility, but neither the professor nor the problem tells you how to input that data. Thanks for the help in advance.
61 more posts in this thread. [Missing image file: Saunders_MacLane.jpg]
A lot of categorical stuff lately on Wikipedia and /sci/ Is category theory a buzz or is it really something in modern mathematics?
27 more posts in this thread. [Missing image file: 293048249032402.jpg]
Say you were in a spaceship and were instantly transported to another section of space somewhere in the universe (e.g. through a wormhole or w/e). How far would you have to be from earth in order that you would have no idea where you are, if your ship carried a copy of all astronomical knowledge known to mankind and was outfitted with radio telescopes (etc.) equivalent to the most advanced that currently exist?

Sci

14 more posts in this thread. [Missing image file: 800px-Schrodinger_Equation.png]
Whose gonna help me decipher shrodingers equation?
14 more posts in this thread. [Missing image file: kirknou.jpg]
You... cannot... into space!
3 more posts in this thread. [Missing image file: EM.png]
Trying to self-study basic (first undergrad class) electricity and magnetism for next semester, up through what's covered in Knight if that means anything to anyone. These two books are cheap and recommended on Amazon, which do you guys think would be more helpful?
0 more posts in this thread. [Missing image file: cochlear implant.jpg]
You probably saw this on the news a few weeks back; deaf kid gets a cochlear nerve implant because he was born without a cochlear nerve. they just send a trickle of current from a microphone right to his brain stem. I read about the 1st ones in Stars & Stripes magazine when they were done on military personnel who had been deafened by explosives. The guy interviewed said "It does not sound like talking; it's like a constant buzz but the buzz changes when people talk." The neurologist speculated that his brain would take sometime to learn to interpret the signal it was getting. Younger brains are so much more plastic that the little kid will probably get a lot more out of his than a grown man could. Question: does this mean we are close to a Google glass that is permanent? Could we implant a visual input? Might be nice to have 3 eyes, one always online.
5 more posts in this thread. [Missing image file: tumblr_m2kxfj9fZv1qd3x7jo6_1280.gif]
http://www.ncbi.nlm.nih.gov/pubmed/18621098 >We have used a chronic unpredictable mild stress (CMS) as a rat model of depression. CMS (5 weeks treatment) produced anedonia and increased corticosterone levels. These effects were accompanied by a detectable increase in caspase-3 positive neurons in the cerebral cortex, suggesting apoptosis. How do you deal with stress /sci/?
2 more posts in this thread. [Missing image file: sqp.jpg]
Putnam/Olympiad-how do I prepare? Also, polyester or any other cloth have impact on intelligence?
0 more posts in this thread. [Missing image file: It's nothing.jpg]
Higgs particle.
5 more posts in this thread. [Missing image file: eyjafjallajokull-lava_drive_in.jpg]
How do I get a summer job in a geology related industry after the 1st year of engineering that I'm going into right now?
9 more posts in this thread. [Missing image file: 1365572795211.gif]
Which is more important, social skills or critical/logical thinking?
4 more posts in this thread. [Missing image file: js.jpg]
/sci/, i have started cycling great distances and to exercise both body and mind, i'd like to listen to mathematics or computer science audiobooks while at it. Got any? Not popular science stuff.
3 more posts in this thread. [Missing image file: img22.gif]
Can someone explain Markov Chain Monte Carlo to me in basic terms? I don't even know what it does (approximate a distribution of interest?) or why that would be useful. I have no idea what this graph means. Please refrain from using statistical jargon since I'm a programmer by training.
0 more posts in this thread. [Missing image file: images.jpg]
Guys, i need your help. I need someone with an access to Pubmed. I live in the 3rd (Eastern Europe) and our university library doesn't have the access to Pubmed. Literally anything of this would be much, much appreciated Thanks in advance http://pastebin.com/pUzQzxdY
11 more posts in this thread. [Missing image file: film-noir.jpg]
Hey, /sci/ I've been writing a crime noir novel, and I've come up to a chapter with an autopsy. However, I may not be the best when it comes to the lingo. Can you please have a read over what I've written? The man was beaten to death, however, had been sexually active during that time... so here goes nothing. Piece 1: 'As you can see, there have been several incisions, nothing fatal, but caused considerable blood loss. All of these cuts were made during a period of between ten weeks and, at least, four days ago.', he then moved on to the bruising, 'Here we see trauma from a blunt object, or several blunt objects. All taken place within the same timeframe as the cuts. Apart from those, Anon was whipped, scratched, and starved. Finally, from these markings around his wrists, neck and ankles, it appears he was bound and gagged with ropes or leather straps. Now, either somebody knew what they were doing, or it was something of a miracle that he survived so long. As far as I am aware, he was supplied with a continuous amount of a drug, maybe cocaine, procaine, opium, morphine; at least some kind of alkaloid, to take the pain away, which must have kept him going. But I'll have a better chemical analysis in the morning.' Piece 2: 'Anon has deep scratch wounds in his back, each with their own unique size and force. These kinds of wounds are generally caused by women, for some reason. I'm not quite sure why. However, all of the bruising and internal trauma, was caused by either a man or a very strong woman. There is too much bruising to focus on a single imprint, to get a size of the fist. It's all a work in progress, this early on in the piece.' cont.
2 more posts in this thread. [Missing image file: whattoread.jpg]
Hey /sci/, I am just finishing "the singularity is near" by Kurzweil, and I need a new popsci book to read in my spare time. Since I couldn't care less about astronomy or biology (which is usually what most of popsci is about), I only found these two books to be candidates. So, which one should I go for, the new one from Kurzweil, or GEB? I also need to mention that I study computational neuroscience, so I am familar with most of the stuff in Kurzweil's book regarding AI/neuroscience, but I am also intrigued as to how he imagines to model the brain with HHMMs. On the other hand I had a look into GEB, and it seems like a really great read. The thrid alternative would be to read "Ender's Game" by Orson Scott, since I am interested in AI/warfare. Or I could ditch all of this, and instead focus more on my textbooks? What would /sci/ do? >inb4 GEB b8
5 more posts in this thread. [Missing image file: su.jpg]
>January 28, 2009 - Sub-atomic-scale Writing Using a Quantum Hologram Sets New Size Record >in this experiment we’ve stored some 35 bits per electron >35 bits per electron What the fuck happened with this and why aren't we having exabyte sized USB drives?






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