Archived threads in /sci/ - Science & Math - 507. page
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Is there a scientific reason why we can easily maintain focus 24 hours straight playing a video game or binge watch TV series with no sleep, but spend just 5 mins studying physics/chemistry and we get bored already?
Why do our brains not show as much enthusiasm in studying than when playing games?
>inb4 dyslexia
Why did the smart kids in high school not play video games?
>>7754271
Dopamine receptors are overexcited by all that stimulation. Cutting back on playing video games and watching tv that much might be able to lower that very high threshold you currently have. Meditation might also aid you in the process.
>>7754271
>We
>Our
lol, it must suck being a deficient plebian.
If so many scientists are such raging liberals, why don't they boycott/ take a stand against the racket run by journal publishers?
>scientists review articles for no pay
>pay hundreds of dollars for their article to be published
>articles already formatted when submitted
>all publisher does is design cover and table of contents
>publisher then sells journal for hundreds/ thousands of dollars per copy
Scientists have to be the biggest cucks to put up with this system.
>>7754170
>what is arxiv
oompa loompa doompa di do
>>7754553
>arxiv
>While the arXiv does contain some dubious e-prints, such as those claiming to refute famous theorems or proving famous conjectures such as Fermat's last theorem using only high-school mathematics,
top kek
>>7754170
Tenure committees and granting agencies still see a publication in Science or Nature as recognition.
To a pretenured professor, recognition = grant dollars = continued job. The publication costs are often included in the grant budget.
Scientists dare not complain, since it's so easy to be blacklisted from funding agencies. Trust me.
I'm having trouble deriving arc length of functions. I'm using a vector-oriented approach, if that's alright. I'm doing this because I don't understand the [math]1+(f')^2[/math] part of the standard formula, and I don't like using formulae I don't understand.
So far I have this:
Let [math]d(\vec{u},\vec{v})[/math] be the Euclidean distance function between two vectors [math]\vec{u}[/math] and [math]\vec{v}[/math], defined by [eqn]d(\vec{u},\vec{v})=\left \| \vec{v}-\vec{u} \right \|[/eqn]. Let [math]f(x)[/math] be any "reasonable"...
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Why don't the eqn tags work?
[eqn]test[/eqn]
[math]test[/math]
Curves are stupid
join the straight-line-and-rational-numbers-only master race
>>7754029
>he proof works as long as it's continuous, actually. I could be wrong.
f needs to be of bounded variation
>I'm not sure how to get rid of that h and replace it with a derivative
Pull h out of the square root. Also you start with a sum, not with an integral. So you obtain the integral in the limit.
How do we know if Euclid's theorem is the same for every instance? (euclid's theorem is a proof that there are infinite prime numbers by contradiction, stating that for every finite series of prime numbers there can always be a new prime number generated from that list) but how do we know that this applies every time?
because euclid proved it
>>7753981
If you are asking this, you don't understand the proof.
>>7753981
>how do we know that this applies every time
Because it doesn't matter how long your list of primes is, by constructing a new number in the way he specified you show that the list is incomplete.
If you are this thickheaded then I recommend making a finite list of primes, using his instructions to construct the new number and then try to factorize that new number with only the primes in your list.
Why do I have to spend a third of my life asleep?
It just seems so ridiculous to me that I need to throw away a third of my life in order to function like a normal human being. How could humans have evolved to do this?
Is there any way around it?
>>7753854
probably because we can't see shit in the night so we're better off conserving energy and secreting growth hormones instead.
I went for about ten years sleeping two hours or less per night.
I really liked having all the extra time, but it had its downside. I tend to have quite enjoyable dreams but during that ten years I would only dream three or four times a year.
When I went to sleep I never went to sleep so deep that I couldn't become fully alert instantly.
>>7753854
Google polyphasic sleep if you have some free time and feel dedicated
I'm new to /sci/ and I was wondering if anyone has any suggestions on a beginner's algebra book?
I suck at Algebra and its always bothered me and I want to improve.
>>7753805
http://web.mat.bham.ac.uk/C.J.Sangwin/euler/
>>7753805
How beginner are we talking here?
>>7753805
They're are only a couple things you should really focus on:
Arithmetic on fractions
Working with nested fractions
polynomial arithmetic
Factoring and solving polynomials
Polynomial long division
Everything else is formulas or covered later (in precalc or LA or calculus)
Well /sci/, how does my resume look? I'm job hunting well I start my Masters.
>3 pages
>Grad Student
>Only one professional experience in your field
Try to shrink it to 2 pages.
Also, trim the fat on the skills that don't apply to whatever you're going for. EEs don't care if you know how to network.
>>7753795
Well it's technically two summers with them and a 16 month project for said company.
>>7753776
>I'm job hunting well I start my masters
I have a hard time believing that. There's a typo already.
What does /sci/ think of Ludwig Wittgenstein?
>>7753684
He was too caught in his (literal) autism and thus too intellectually limited by his own pedantry to make any noteworthy contributions.
>>7753684
>>/lit/
>>7753684
Handsome
Are chemists good at math?
>>7753664
Depends on the type of chemist, and the type of math.
>>7753664
physical chemists are probably pretty decent at math/were interested in math as undergrads. Good deal of group theory, PDEs, etc. from what little I've seen in more 'applied' QM texts like Slater's atomic/molecular theory books.
>>7753672
What about organic chemists, chemical biologists, biochemists
german here
whats the difference between a building engineer (bauingenieur in german) and civil engineer?
how hard are they compared to EE or ME
>>7753411
>search civil engineering on wikipedia
>switch from english to german
>site switches from civil engineering to bauingenierwesen
>>7753411
civil engineering covers buildings, dams, sewers, aqueducts, roads, bridges, seaports, airports, mines
building engineering would a specialization
>>7753411
Don't go into either. Unless you're mentally retarded, that is.
what is /sci/'s opinion of Michio Kaku?
Much IO & Cuckoo
>>7753395
Arrogant fuck.
>>7753587
I've only recently started watching his talks, have you got any examples?
Hey, this is the first time I'm on /sci/ and I don't know where else I should ask so I'll try here.
Is there theoretically speaking any way for us people to spot being a flesh robot host controlled by our parasitic mind? What I mean is, why are we not able to control our own body better? A lot of people already suffer from those primitive emotions like anger, sadness, depression and from what I've read, one can learn to overcome those things but what about the other things we have no saying in? Why can't we disable the feeling of hunger, even...
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because all of those functions are controlled by parts of our brain/nervous system that we have no conscious control over
>>7753203
back to /x/ with you
>>7753237
This is no /x/ shit, it's just based on how we work.
>>7753223
Obviously, but why do we have no conscious control over it? I don't want to get into the question of "free will" but just the fact that it seems like our own body thinks we're to retarded to handle ourselves properly so we have to get someone to get our body to change it's opinion.
>Lol, you can't really run that well. Oh shit,...
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So I can look through a telescope and spot one of the most distant galaxies from us around 14 billion light years away. Then an observer in that galaxy could be doing the same as me but looking in the exact opposite direction to my galaxy, and they would also spot a distant galaxy around 14 billion light years away (one that I can not see at all). And there could be an observer in this 3rd galaxy doing the same, but looking at a galaxy in the opposite direction (that neither me or observer 2 can see).... and so on, and so on.
So how many times can this repeat? I read...
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We figure this out by taking accurate measurements of the curvature of spacetime with large interferometers in space. We just need to build them first.
All current data suggests the universe is flat and therefore infinite.
>>7753187
>All current data suggests the universe is flat and therefore infinite
>>7753187
Does this mean theories about other universes existing outside our own are essentially dead?
What do people around the world think about the french system of "classe préparatoire" preparing for the big engeenering, research and business schools of France? Do you think it better or worse than more traditional universities? If you don't know about the system, feel free to ask.
>>7753099
They don't give a shit about it, they don't even know it exist.
preparing for engineering is not doing engineering
you can't just ask to people "what do you think about this class that don't give me any diploma ?" and wait for any relevant answer
It is more relevant to ask "what does people around the world think about french system of engineering school ?"
I like the French engineering system because an engineer there is not limited to mechanical, electrical, chemical. Engineers coming out of places like Ecole Polytechnique could go on to do anything from math to physics to finance to politics.
>>7753099
I heard it's badass. However your education systems often has an image of something so bureaucratic that it's impossible to navigate in unless you were born in it. I think most students know mathematical education in France is second to none in the world, but they don't go for it because there's not enough PR about it. That's the only thing I'd change, and I think it is really necessary to attract talents from abroad.
http://www.mirror.co.uk/news/technology-science/science/heres-might-just-possible-escape-7092807
what do you fa/sci/sts think of this?
>it stays the same
>>7753024
In general a given volume of water at room temperature will increase in volume by about 9% when frozen. And in general about 7% of an ice cube sticks out of the water. So the water level will fall a bit i think.
Do we assume that this ice is frozen water?
