Archived threads in /sci/ - Science & Math - 529. page
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ITT: post facts an mnemonics you use to remember them.
Fatou's lemma: Put the limit on the outside, nigga, and that's the side that's gonna be bigga!
Please tell me how to remember Stokes Theorem, the Divergence theorem, Greens theorem and all of Lin Alg please
>>7738025
>Put the limit on the outside, nigga, and that's the side that's gonna be bigga!
my sides
>>7738025
Literally who can't remember Fatou's lemma
It's one of the few intuitively obvious results
I have a little something different for the /sci/ board. I posted this on /an/, but it occurs with people more knowledgeable about astronomy is probably a better place. Hopefully this isn't breaking any forum rules.
I need an astrology-based name for a male Great Pyrenees puppy. His sister's name is Luna, and we wanted to keep the theme going.
I've been shot down for:
Astro
Comet
Leo
Cosmo
Pluto
Any ideas, /sci/? I love astronomy but never had time to pursue it, so my knowledge in the area is lacking.
Thanks for your time.
Since one's named after the moon of the Earth, why not go for another moon's name?
>Deimos/Phobos for maximal edge
>Callisto
>Titan
>Io
>Atlas
actually just refer to https://en.wikipedia.org/wiki/List_of_natural_satellites
>>7738014
Name him Muhammad
Also,
>Astrology-themed Puppy Name
>Astrology
wew lad
I am graduating my bachelors in neuroscience at one of the better universities (worldwide) for it. But, I lost my passion for the brain about halfway through the degree. I'm 23 and thinking for studying an engineering degree, focusing on biomedical or mechanical.
How ridiculous does this sound? I would love to work with BCI and prosthetic devices.
It doesn't.
I have a BS in Pure math, an MS in Applied Math and I'm finishing up an MS in MechE and PhD in Applied Math. My research is in stability/bifurcation theory and control theory. For the MSME, my reaearch is in robotics/control theory.
Shit happens, senpai. You just get the itch.
>>7737816
>bachelors in neuroscience
If you had a PhD in neuro coupled with an engineering degree that would've been ideal for a research career, but if you do your BEng/MEng now you're pretty much only going to have access to same jobs any other Biomed BEng/MEng has.
Honestly I know you said you lost your passion, but if you don't go to grad-school for neuro you've pretty much wasted the last 4 years of your life.
>>7737820
I'm not interested in pursuing research, I would like to create a legacy for myself and future family. Why would I pursue a career I have no passion for when I could change now? I will never be a great neuro scientist, I may be great at innovating bio/mechanical inventions which work with the brain.
http://www.theguardian.com/world/gallery/2015/oct/29/north-korea-atom-nuclear-science-centre-pictures
So /sci/, why havent you moved to Best Korea yet ? It is well known that under communism, science can progress without too much hesitation.
I don't think I'd be useful, these guys have already figured fusion power out. My primitive western education might as well be in alchemy.
>>7737751
You can even see in the picture the shitty neighbourhoods surrounding the laboratory. They couldn't even bother to take it from a good angle that only showed the 'progress' they fake by doing this shit.
Other than that, good for them. Hopefully they actually have scientists that can do research that has never been done before. So that when the dictatorship falls in a couple of decades North Korea joins the academic community and we can advance our technology a bit faster.
They probably...
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>>7737751
>You can even see in the picture the shitty neighbourhoods surrounding the laboratory. They couldn't even bother to take it from a good angle that only showed the 'progress' they fake by doing this shit.
By shitty neighbourhoods you mean commie blocks? They don't nessescarily have to be shitty but in general they are, but lets not judge to quickly.
I do not think that the dictatorship will fall in a couple decades. They have big plans when it comes to...
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I dont know why people care about the SpaceX landing.
NASA did the same 10 years ago.
Proof:
https://youtu.be/FZ-H-A9Vzdo
>>7737703
NASA is a joke. The real innovation happens though military contracts: R&D
>>7737703
This is some proper quality bait. I'm impressed :p. Only sad thing is that people might actually think this is real.
>>7737703
I'd literally suck Elon Musk's dick if he'd let me. Honestly, I love the fuck out of the guy no homo
Scientists have a very ill formed definition of philosophy. Philosophy is a quest for objectivity just like science, that's why science was derived from philosophy. The philosophical method is much broader than the scientific one, applicable to human affairs and even to worlds that aren't actual, that's the power of introspection. They conclude that philosophical discourses are nonsensical because of their preconceived notion of sense data as the only source of objectivity, a notion derived from the philosophical method, after all you can't empirically verify...
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>>7737551
>Philosophy is a quest for objectivity just like science
Science is not a quest for objectivity. Science is phenomenological.
>nd just to be fair, there's a lot of philosophies out there that are actually bullshit,
the problem is there is no clear way to tell what is valuable insight and what is meaningless sophistry. Philosophy lacks a mechanism for self-correction, this is why science pays it no heed. Being right isn't what...
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>>7737562
>Science is not a quest for objectivity. Science is phenomenological.
I agree, but do you think scientists know that? I don't think so. As far as i can tell, scientists do not only think science is a quest for objectivity but it is also the only source of objective knowledge.
>>7737568
No scientist thinks that. Philosophers are just full of themselves.
So I decided to try to learn more rigorous mathematics, and read Apostol's Calculus and Higher Algebra by Barnard and Child.
Problem is that Higher Algebra is so fucking dry. It reads like the Elements. It's just 600 pages of definitions, propositions, and proofs. Apostol's book was way, way, easier to understand even though the subject is arguably more complex. Are you really supposed to and be expected to learn a subject like that? It's hard to explain, but there's no motivation for the propositions I guess. No stuff "in between" like...
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>>7737327
Read Hall and Knight or G. Chrystal
>>7737327
A rigorous book usually follows the Definition, Proposition, Theorem, Discussion structure, yeah.
Also what the fuck is this book you're reading? Why don't you use something more modern for elementary algebra like Khan academy or something? And elements? What the fuck are you doing bro? Please, take a look at a real mathematics curriculum and learn following the syllabi if you're really interested in doing math.
If you already did a chunk of apostol's calculus you're ready for...
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>>7737344
I guess it lacks the discussion part then.
>Why don't you use something more modern for elementary algebra like Khan academy or something?
I was told rigour was important. Khan Academy hardly has a rigorous approach to algebra. I already know the subject, but not rigorously.
The elements I just read as a historic thing, not to learn Geometry.
The book itself might be the issue, but I'm having a bit of issue seeing what "counts" as rigour and...
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Is there any scientifically meaningful reason to focus on manned spaceflight besides "To see if we can do it"? I know that the long-term goal will be for the establishment of extraterrestrial colonies but that has more to do with a mixture of sentimentality and the long-term survival of the species. As far as expanding our scientific understanding in a purely practical sense, is there any reason to actually send humans into space?
http://www.luf.org/
>>7737257
http://techcrunch.com/2015/12/21/spacex-successfully-lands-a-giant-falcon-9-rocket-for-the-first-time/?ncid=txtlnkusaolp00000591
>>7737207
You have any idea how empty hospitals would be with out space exploration?
Just got a job at my uni to tutor ochem and calc.
Any TAs/tutors here? Any stories, advice, etc?
TA/tutor general, I guess.
It'll be my first time doing any tutoring, so emphasis on the "advice". For sure I won't spoonfeed, but I don't have a specific way I'd teach anybody.
>>7737037
Don't really know what to say about Calc, but I can definitely give you some advice about tutoring O Chem. I tutor it actively and did for about two years before. Plus I TA an OChem lab. I'll give you advice wherever I can.
>>7737061
Yeah, anything helps. I basically came out on the top of the class for both parts of the sequence and out of nowhere the professor offers me the position for ochem; I haven't the slightest clue how to teach.
So, why is gravity weaker than the other forces? Could it be that the power of a force is inversely proportional to the range that it must act across? Of the three forces mentioned, in order of power they go gravity, electromagnetic, nuclear. In order of range they decay over, they go nuclear, electromagnetic, gravity.
So is it something like k/(Force of the force when two objects are touching)=(distance where force is half as much as when the two objects are touching)?
>>7736742
>Could it be that the power of a force is inversely proportional to the range that it must act across?
No.
https://en.wikipedia.org/wiki/General_relativity
>>7736742
>k/(Force of the force when two objects are touching)=(distance where force is half as much as when the two objects are touching)?
No. For instance, that is actually the same distance for gravity and electromagnetism! Both follow an inverse-square law where the force at a distance d is half the force at d/sqrt2.
>>7738995
The only reason it seems like gravity has a longer range than electromagnetism is just that matter in general is composed of equal numbers of positive and negative charges, so large bodies have almost zero net charge*. Gravity, however, attracts everything, so large bodies build up a truly enormous gravitational "charge". This is why gravity dominates the universe, despite seeming so weak.
*the same goes for magnetism: Since every magnetic dipole has a North and South pole right next to one another,...
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So how do I make sure I become the golden boy?
>>7735972
Suck his dick.
>>7735972
you dont want to be
>say goodbye to your weekends
make sure you have at least one side project, two if youre in your first 2-3 years.
Dont suck at presenting your results at lab meeting ie be prepared and not half asleep.
![calculator-01[1].jpg](https://i.imgur.com/CyOfhaW.jpg "calculator-01[1].jpg")
For what reason are programmable calculators still not allowed?
We live in a world with goddamn internet enabled phones and tablets now and forever.
Why don't they just force us to use an abacus?
Because you're being tested on your ability to do something that could be programmed into a programmable calculator, obviously.
>>7735828
What the point?
We don't need that ability anymore.
slide rule precision was enough to get to the Moon
Is it scientifically possible to construct a lightsaber? Lasers are real right? So just have to find a way to control its length....electromagnetics, gravity, strong nuclear force maybe?
https://www.youtube.com/watch?v=u-xHso660tA
You make something similar, video related.
Maybe if you could project a magnetic field in a bar-shape you could contain some plasma with it.
Besides being a literal meme and loved by Reddit, there's something about this guy that pisses me off
He's like this faux scientist that is a living and breathing clickbait article that makes retards who don't actually know science think they're smart
is he even considered a real voice in the actual scientific community
no, he's just a celebrity
>>7735543
No. Bright undergrads could publish more papers than he has in his career.
He's a great educator and science advocate, but in terms of actual contributions to his field, he's not held in very high regard. I don't see why /sci/ has a big problem with his educating laymen on science.
what if string theory is the best we've got?
What if a proof was found that says no Theory of Everything can exist without generating a large number of universes and taking the anthropic principle into account?
would phycisists go through an existential crisis like mathematicians did after godel's incompleteness theorem was proven? would they commit mass suicide?
>>7735514
what if your mum wasn't whore?
I think you'd have gotten a proper education and wouldn't be asking stupid questions on a barbadian pig fucking forum.
>>7735514
honestly I don't know why they haven't already since even their theory of gravity doesn't work and they had to add "dark matter"...
So I guess no, they won't commit mass suicide, they had the opportunity before.
>>7735514
There exist particles that hide under the guise of a zero-point on the velocity-pattern of a vibrating string.
These particles are probably the fundamental ones, while the extrema of the velocity pattern is the source of quantum gravity/entanglement.
yeah I am crazy.
