Is there a theorem more beautiful than the CLT?
It never senses to amaze me.
>>7950985
central limit therom?
>>7950985
Easy but extremely beautiful and useful ones:
the spectral theorem.
and equivalence of norms in finite dimensions.
>>7950985
>CL[i]T theory
Person casually mentions thoughts of killing self etc. while not being a direct confession/seeking help and also clearly not joking. What do you do / considerations to make?
Go. Let's see how our EQs match the IQs i'm sure some of you take pride in.
>>7950864
Call them a faggot
challenge them to do it
>>7950864
Need to know more about the person to find the best solution.
But most who mention suicide casually are not necessarily self destructive but definitely hate their lives.
I nominated Stephen Wolfram
>At the age of 12, he wrote a dictionary on physics.[25] By 13 or 14, had written three books on particle physics.[26][27][28] They were not published.
>By age 15 he began research in applied quantum field theory and particle physics and publish scientific papers. Topics included matter creation and annihilation, the fundamental interactions, elementary particles and their currents, hadronic and leptonic physics, and the parton model, published in professional peer-reviewed scientific journals including Nuclear Physics B, Australian Journal of Physics, Nuovo Cimento, and Physical Review D.[29] Working independently, Wolfram published a widely cited paper on heavy quark production at age 18[3] and nine other papers,[15] and continued research and to publish on particle physics into his early twenties. Wolfram's work with Geoffrey C. Fox on the theory of the strong interaction is still used in experimental particle physics.[30]
>He was educated at Eton College, but left prematurely in 1976.[31] He entered St. John's College, Oxford at age 17 but found lectures "awful",[15] and left in 1978[32] without graduating[33][34] to attend the California Institute of Technology, the following year, where he received a PhD[35] in particle physics on November 19, 1979 at age 20.[36] Wolfram's thesis committee was composed of Richard Feynman, Peter Goldreich, Frank J. Sciulli and Steven Frautschi, and chaired by Richard D. Field.[36][37]
I nominate myself.
>At the age of 10, he wrote a dictionary on physics.[25] By 11 or 12, had written three books on particle physics.[26][27][28] They were not published.
>By age 13 he began research in applied quantum field theory and particle physics and publish scientific papers. Topics included matter creation and annihilation, the fundamental interactions, elementary particles and their currents, hadronic and leptonic physics, and the parton model, published in professional peer-reviewed scientific journals including Nuclear Physics B, Australian Journal of Physics, Nuovo Cimento, and Physical Review D.[29] Working independently, he published a widely cited paper on heavy quark production at age 17[3] and nine other papers,[15] and continued research and to publish on particle physics into his late teens. His work with Geoffrey C. Fox on the theory of the strong interaction is still used in experimental particle physics.[30]
>He was educated at MIT, but left prematurely in 1976.[31] He entered Harvard at age 17 but found lectures "awful",[15] and left in 1978[32] without graduating[33][34] to attend the California Institute of Technology, the following year, where he received a PhD[35] in particle physics on November 19, 2016 at age 19.[36] His thesis committee was composed of Edward Witten, Stephen Hawking, Leonard Susskind and Lee Smolin, and chaired by Michio Kaku[36][37]
>>7950757
How do we measure and compare the different fields of intellect?
>>7950835
Level of intellectual ability required to not only understand the concepts but to make profound leaps in understanding leading to new ideas
Hey /sci. As a high school senior, how could I best prepare for majoring in Computer Science besides learning programming languages? I'm fairly proficient in Java and C++, but I would like to get a leg up on the mathematical side of computer science before I enter college. Should I start with discrete mathematics, and if so, are there any books that you would recommend? Is it worth it to go through Spivak's Calculus if I felt that my high school Calculus course is a little too lightweight? Sorry for the meme degree, but it just happens to be something that I'm legitimately interested in.
Calculus and Linear Algebra. They are your friends. Pretty much cover up everything you need for undergrad. Learn them enough to understand some optimization algorithms. Discrete Math is easy af. If you can't get 4.0 I recommend you to quit asap. Stop wasting everyone's time.
Learn some set theory and proofs, that comes into play when you learn algorithms and computability
How to Prove It - Velleman
Book of Proof - forgot
Those are pretty good books you can go through but be ready to rigorously prove some extremely mundane and painfully obvious shit. You technically could go through Spivak, but trust me it won't be worth it for the path you're going down.
>>7950790
why don't you think Spivak will be worth it? Does Calculus not play a big a factor in theoretical CS?
>you were born just in time to witness the glorious room temperature superconductor age
>superconductivity enables magnetic levitation
>tfw magical maglev flying cars, zero-gravity chambers, and real hoverboards are not only possible but inevitable
http://www.sciencealert.com/physicists-achieve-superconductivity-at-room-temperature
http://www.livescience.com/51877-superconductors-new-temperature-record.html
http://www.extremetech.com/extreme/220962-new-hydrogen-discovery-could-help-make-room-temperature-superconductors-a-reality
Relevant Videos:
https://www.youtube.com/watch?v=FmL4datwJ3E
https://www.youtube.com/watch?v=Eo1kwuCDrfM
https://www.youtube.com/watch?v=zPqEEZa2Gis
>>7950678
popsci incarnate
>>7950678
>omg my life will be wonderful now, think you scientists for making me happy in giving me plenty of pleasures
>>7950678
>http://www.livescience.com/51877-superconductors-new-temperature-record.html
Yeah, but it's at twenty times the pressure required to make industrial grade diamonds- that's not practical at all. Call me when there's a breakthrough, not just guys dicking around
I just got out of an exam for my organic II exam, and there were two questions i can't really seem to find the answer to online anywhere. these were my answers, but I'm not sure if they're correct. can anyone help?
>>7950465
number 2 is correct (not sure if you were also supposed to specify some weak acid to catalyze it).
there's something wrong with number 1: cyclohexane is not very nucleophilic, probably you are not recalling the presence of some functional group.
Furthermore, under Lewis acidic conditions the epoxide will be attacked at the more hindered position.
>>7950518
seconded
#1 wouldn't react under those conditions.
Alright /sci/, I've looked and looked but I can't the parts I need for a project I'm working on. I'm not an engineer, so I think I'm not using the right terminology when I search. I refuse to believe this is so difficult.
Any help would be much appreciated.
My project requires positioning a 5 kg component *very* precisely over the XY plane (where Z is vertical, i.e. perpendicular to the ground/gravity), over an area not to exceed 0.5 m^2. I need to be able to position the component ANYWHERE in the 0.5 m^2 area, to within 1 cm.
Some considerations:
>Accuracy
* Accurate to within 1 cm is crucial. To within 1 mm would be outstanding.
>Time
* The move time is not critical, so it can take several seconds to re-position itself. Accuracy and repeatability is key.
>Dwell time (is this the correct term?)
* The positioning system may need to wait for a bit while the component performs an action. After which it may re-position to a new location that is not the default state. So it isn't just moving and immediately reciprocating.
* Method
My crude drawing (pic related) has the 5 kg component attached to linear slides by arms/struts/horizontal supports.
* Again, perhaps I'm going about this the wrong way, because as long as the component is in the right spot IDGAF how it gets there.
I'll post what I've found so far in the next post.
>>7950308
I looked at linear slides, all the ones I looked at simply popped out and return. I think they were intended for assembly-line applications.
XY linear stages were almost all too small.
The 3 or so that were 0.5-1 m^2 were $10,000 or more.
Linear servos weren't long enough, or were designed for hobbyists. Again, I need something better suited for commercial/industrial use.
Almost everything I saw was not meant for positioning *anywhere* on the stroke length. Rather, they were for extending to maximum length quickly, and returning back to 0 immediately.
Nowhere in between.
No lingering.
Why does such a such a product not exist for <$10,000? It's very simple from an engineering standpoint.
>>7950308
wtf are the grey connections supposed to be
>>7950334
it's not so simple...
As an engineer, you should count $10k for every degree of freedom on a factory robot, which would make what you ask, all costs included, $20k
For an XY machine, the system is overconstrained, and 5kg is heavy.
Have you considered a robotic arm like pic related?
Me and my friends argued after watching one of the alien movie where the alien get its head emptied in space through a very small opening in the space station.
now we both agreed that since the difference in pressure is 1 atmosphere between the inside and the outside of the space station, and that the hole is very small, it couldn't actually empty the guy and was more or less harmless.
The actual argument was about wether sticking your finger in the plug the hole was dangerous or not. sure, it's almost a perfect vacuum outside and your finger would swell up, but wouldn't the blood keep flowing because the rest of your body is safe, , and the worst case scenario would be that while swelling up your finger would get stuck in the hole and need to be cut ?
TL;DR : if you stick your finger in a gap between a space station and space, would you actually have long lasting problems , a fucked up finger or nothing at all ?
There would just be some suction. Your finger would be fine.
>>7949964
You could compare this to Delta P diving accidents. The pressures there far exceed 1 bar and yet the divers are just held in place and not shredded up or something.
You're working against pretty low forces here so I think you'd be able to just pull the finger out.
Brings me back to grandads old fingerbox
Seven years out of highschool, I realize I only have basic arithmetic skills left. I'm trying to relearn math to the calculus level having forgotten mostly everything. Are there sources that mostly focus on mathematic disciplines in terms of their real world functions? I want to understand better the theoretical concepts in math and the kinds of real problems that they intended to resolve. Are there theory/practical application intensive courses I can use to supplement my purely technical studies? Something that gets at the underlying logic behind mathematics and can express that besides numerical terms?
>>7949934
Wikipedia
>>7949934
This fucking scares me. I think the worst possible thing is coming to a problem that includes a concept you should have already known a long time ago.
>>7949943
In highschool I viewed math as a means to getting the right answers on tests. So I forgot anything I learned pretty quickly despite getting good grades.
hey /sci/
I need some help understanding Wittgenstein's philosophy of mathematics (if it's even possible for anyone other than Wittgenstein to do so).
I considered posting this in the SQT, but while I am a stupid person, I don't think this is a stupid question.
I've not been able to find much accessible material on the subject and I am woefully uneducated, so I need help from you to translate the technical language into lay terms.
Thanks in advance.
Lamentably autistic faggots of this board hate philosophy. You can find help in /lit/ or /his/.
>>7949917
I actually love philosophy, especially theory of science.
Wittgenstein's is the second most interesting philosophie, because his approach of understanding language is the promising. When you got the key to language you got the key to everything imo
I'm not sure what he told about math, but I'm eager to read.
>>7949928
[Edit] ... most promising
hey guys, I want to ask you, if someone can explain to me why do capillary waves form on water jet.
THANKS!
this is arduously to explain. make yourself familiarize with Re/Oh/We numbers
if youre really interested:
Lefebvre, Arthur H. “Atomisation and Sprays” 1989, Taylor & Francis Group, LLC
The aerodynamic instability and disintegration of viscous liquid sheets, N. DOMBROWSKI and W. R. JOHNS, Chemical Engineering Science, 1963, Vol. 18, pp. 203-214. Pergamon Press Ltd., Oxford. Printed in Great Britain.
http://scitation.aip.org/content/aip/journal/pofa/2/5/10.1063/1.857724
my guess
here are some examples, but best pictures for simple orifices ive seen are in first source. lefebvre is really profitable lecture!
like pic related, there are different regimes starting with breaking down surface tension forces (this ends up at hyperbola OhRe =2 for simple orifices) after that jet is passing through the other regimes until complete spray formation. so you cannot say what is occuring that easy. in addition real processes are instationary for normal...
Let us have a rational and on-topic about the work of this Electrical Engineer who was a Professor at MIT for 37 years.
His name is Dr John Trump.
>>7949193
NO FUCK OFF FASCIST SCUM.
>>7949193
Ok, you start. Who is this and what is worth discussing about him?
Man I love Trump
>he struggled with quadratics
LITERALLY HOW?!
>>7949184
Algebraic geometry is hard.
>>7949184
That shit was hard as fuck when I was 16. We all have to start somewhere anon.
>>7949184
If you mean quadratic polynomials, yeah there's no reason to struggle.
What is the science behind this?
>>7949175
I see that it's a fuckin gif and i aint watchin that shit
>>7949175
it's that when your eye sensors see the same thing for a longer period of time, they get used to it, so when it stops they start seeing the opposite.
>>7949183
>4chan-acquired reflexes
>http://phys.org/news/2016-03-scientists-dont-thought.html
Once again, climatefags btfo
when will they learn?
climatology is not a science, it cannot even make testable predictions.
>>7948964
>climatefags btfo , they are wrong LMAO
dude,science is all about try and error
they are trying to understand,nobody is capable of being right exactly every time.
As stated above,you know science is progressing when they are proving themselves wrong.
So please stop be an idiot and appreciate it.
>>7948971
yes I do.
What I don't appreciate is using inaccurate models to predict things that are used as the scientific truth.
>scientists-dont-thought
damn that's a diss of a URL
Anyway, they try. Much of human endeavors should be interpreted as a struggle against the impossible. Like how medicine tries to save the elderly, climatology tries to make predictions about an absurdly complicated system. In both cases the people involved know success will be limited.
Hmm... That kind of existentialist talk makes me want to study the numerical solution of stiff PDEs some more.
![615-800-600[1].jpg](https://i.imgur.com/BZk5qxz.jpg "615-800-600[1]")
