File: iStock_000003361095Medium-320x380.jpg (85KB, 320x380px) Image search:
[Google]
85KB, 320x380px
Is it going to blow up soon?
19 Posts / 1 Images
View this topic
>>
>>7805007
No, in distant future yes - maybe.
>>
>>7805007
Soon relative to what?
>>
yes
t god
Anonymous
So I work in the field of renewable energy specifically solar cells 2016-01-23 18:28:58 Post No.7804589
[Report] Image search: [Google]
So I work in the field of renewable energy specifically solar cells 2016-01-23 18:28:58 Post No.7804589
[Report] Image search: [Google]
File: thin-film-solar-panels-e1372104973762.jpg (90KB, 660x330px) Image search:
[Google]
90KB, 660x330px
So I work in the field of renewable energy specifically solar cells
Anonymous
2016-01-23 18:28:58
Post No. 7804589
[Report]
[View this topic]
Its kinda funny how every single week you hear the media hyping about "efficient and low cost solar cells" which will one day be available to everyone.
Unfortunately this hype is simply not justified with reality.
The materials I use to make my solar cells cost $2000 and efficiency barely ever reaches 10%. For higher efficiencies (>30%) it costs even more just to acquire the basic materials. Not to mention most of these solar cell materials are all patented, which is the very reason why they are so ridiculously expensive in the first place.
The reason why you see solar cells like pic related is because its more profitable to manufacture them in that way.
The very notion of "low cost energy generation" is completely laughable and fundamentally incompatible with conventional economics.
27 Posts / 3 Images
View this topic
>>
>>7804589
It's kinda funny how you're lying about working in the field.
>>
>>7804593
I'm guessing "working in the field" means that Anon is the grunt who reads the number off the scale when they test the integrity of the piles/footings that solar panels are mounted on.
>>
>>7804589
I have high hopes for solar energy, but a big issue is raw materials. We already use so much silicon for computers, and we would need so much more to provide solar power for the whole country. We need to figure out how to harness solar energy using a more abundant material.
File: Fractional Operators.jpg (33KB, 329x499px) Image search:
[Google]
33KB, 329x499px
What topics do you think will be next big thing in mathematics?
16 Posts / 2 Images
View this topic
>>
>>7803519
Triple integrals
>>
Inter-universal teichmuller theoretic interpretations of -1/12
>>
>>7803519
>with applications
Dropped.
Are you smart? Find the applications yourself, you faggot.
On topic now, triple integrals.
Anonymous
Calculus 2 - What is the point of it? 2016-01-23 17:52:28 Post No.7804506
[Report] Image search: [Google]
Calculus 2 - What is the point of it? 2016-01-23 17:52:28 Post No.7804506
[Report] Image search: [Google]
Calculus 2 - What is the point of it?
Anonymous
2016-01-23 17:52:28
Post No. 7804506
[Report]
[View this topic]
Guys, I am already failing Calc 2 and I am only 3 weeks into the spring semester. I hate it so far. What is the point of it? Calc 1 was very useful since it taught me how to deal with the tangent and area problems. Calc 2 seems to be more of the same but with harder problems. I don't think I'll ever remember "Integration by parts" or "trig substitution". I will forget this bullshit after this semester ends. If I fail this class I will never get hired at a large company or be accepted into a real college. Is it too late to change my major from Computer Science. Maybe I can learn to suck dicks for a living. Help me try to understand the point of Calc 2. Also, it seems like everyone agrees that Calc 2 is harder than Calc 1 and 3. Is that true?
I am a purpose driven learner. If I see a point in something I can learn it no matter how hard it is, but if it lacks a point I will struggle with it no matter how easy it is.
86 Posts / 3 Images
View this topic
>>
>>7804506
here's your (You)
>>
>>7804506
without calc2 you can't even solve a simple problem like http://www.motleytech.net/en/2015/03/20/falling-into-the-sun/ with analysis alone, and would have to resort to using other equations (which were derived from calc 2, by the way)
>>
>>7804506
Integration by parts is the product rule of derivatives done in reverse. Trig substitution is tough, but you learn the patterns if you do some integrals.
The point of calc 2 is to prepare you for integrals in calc 3. You'll be using the same techniques, but it will be with more dimensions. This doesn't make it harder; it's only really a couple more layers and it does make it more useful. When you learn integrals in calc 3, you can add up surface areas,or figure out force applied to something that's not a perfect geometric figure. Calc is mad useful with probability theory, and integrals are central to meaningfully understanding how it all works.
Right now, it may seem like you're doing a bunch of worthless substitutions and pointless syntactical exercises. That's because you are. I find calc classes too often separate the meaning of the work from the actual calculations. It's annoying. But if the structure of your class is anything like mine, you'll start to get into very basic applications soonish. GLHF
File: 0OS0UpA.gif (47KB, 306x469px) Image search:
[Google]
47KB, 306x469px
Could we one day live over 200 years old? Maybe even over 1000?
21 Posts / 4 Images
View this topic
>>
>>7803333
We would have to first cure cancer, as cancer consumes everything eventually, then work on keeping cells young and fresh.
>>
>>7803333
Sure.
>>
Life expectancy increases with 1 - 2 months per year. Reaching 100 is quite feasible these days. So you only need 600 - 1200 years of progress..
The rate if increase is itself expected to increase and when we reach 1 year per year we have reached what is called "actuarial escape velocity". I'll let you do the calculations.
File: qeDnICz.jpg (198KB, 499x395px) Image search:
[Google]
198KB, 499x395px
Coud someone get ahold of 30000 m^3 of helium? how? and how could it be sealed
22 Posts / 2 Images
View this topic
>>
>>7803064
i wonder what the equation of that graoh is
>>
>>7803100
Don't wonder. Go get your PhD in Duck v. Rabbit modeling, and figure it out.
>>
Anonymous
Meet the next Einstein 2016-01-23 16:31:40 Post No.7804348
[Report] Image search: [Google]
Meet the next Einstein 2016-01-23 16:31:40 Post No.7804348
[Report] Image search: [Google]
File: Sabrina-Gonzalez-Pasterski.jpg (32KB, 630x457px) Image search:
[Google]
32KB, 630x457px
Why weren't you the next Einstein /sci/
141 Posts / 10 Images
View this topic
>>
>>7804348
There is something evil in her face. I think it's the combination of eyes, eyebrows and mouth. Something about her physiognomy tells me she's a psychopath.
>>
Because I'm stupid, why else?
>>
>>7804348
b/c the media doesn't understand that doing minor work in some niche QG field isn't the same thing as creating GR
Okay guys, I seriously fucked up today. Earlier this afternoon, there was a small "incident" in my meeting with my supervising professor (I am a graduate student) and I just got an e-mail from him saying that he wasn't going to have the funding he thought he was and that I should probably look for another research team. I think that it's because of this incident but it's embarrassing so I don't want to confront him about it just in case nothing actually happened and he is just legitimately out of funds. But it's weird that it would be so sudden and that he would recommend switching teams literally the same afternoon.
I was over halfway done with my research. How do I ask him if it was concerning the "incident" without embarrassing myself? I sort of want to clear things up and preferably NOT lose my funding.
72 Posts / 11 Images
View this topic
>>
>>7798975
What was the incident?
>>
>>7798985
I didn't really want to say but I guess I have to specify. I don't think that it was that big of a deal and he might not have noticed.
So when I go to campus I close out my laptop and disconnect it from my charger and put it in my backpack. I'll do a quick glance to make sure there is no porn so I don't open it in a public place and somebody sees me watching porn. This morning I made sure there was no porn and then left for campus.
The meetings are just me and him in his office. I usually open up my laptop and then pull up the thing I want to show him (data or a paper or whatever) and then turn my laptop on his desk so he can see. This is also a failsafe in case I have crap up on my screen.
For whatever reason, when I opened up my laptop he just decided to walk over and look over my shoulder. NBD since I closed out of all the porn. He stood over my shoulder as I put in my login credentials, and even though it wasn't porn I had left a LiveLeak search up for "Baby Monkeys Getting Eaten". I didn't really exit the browser that quickly either so that didn't help. The entire rest of the meeting he was way quieter and more short with me than usual, and he seemed sort of flustered.
>>
>>7799009
lmao you're fucked
File: 1445284504688.png (309KB, 504x398px) Image search:
[Google]
309KB, 504x398px
>an electron has never been observed.
>you believe in it anyway.
Wow, you guys are worse than young earth creationists.
247 Posts / 25 Images
View this topic
>>
>>7795092
>how do computers work
>what are electron microscopes
>what is electricity
>how do old rectifiers work
>what is an electron gun
>what is thermoionic emission
>>an electron has never been observed.
>what are solvated electrons
>>
>>7795107
cont.
>how do chemical reactions occur
>how does a capacitor work
>what creates electromagnetic waves
>how are x-rays generated
>why does phosphorus on old tvs glow
>how does a magnetron work
>what is a coulomb explosion
>how do lasers work
>how do transformers work
>how does a transistor work
>why does metal conduct electricity
>how come chemical reactions can release and store energy
>what is the thermoelectric effect
>>
>>7795107
All good questions about phenomenon in the natural world. I assume you have a hypothesis that some magical little "electron" particle is behind it all? Why don't you go observe an electron and validate your hypothesis.
File: y33cogjhp4qblg1hqmn8.jpg (70KB, 800x394px) Image search:
[Google]
70KB, 800x394px
There simply is no greater pursuit for humanity.
Does SpaceX have the engineering capability to pull this off?
162 Posts / 18 Images
View this topic
>>
>>7792102
In my humble opinion no they do not. We haven't even landed anything on there yet
>>
>>7792247
You trolling breh?
>>
>>7792102
>There simply is no greater pursuit for humanity.
Nah, it's not a "great pursuit," its a necessity.
existing on multiple planets is crucial to the species' survival
File: 1423501215867.jpg (106KB, 832x661px) Image search:
[Google]
106KB, 832x661px
>derivative of a function that includes the transcendental number pi
>nothing happens, it is just a constant like any other.
>derivative of a function with the transcendental number e
>out of nowhere you have to learn new fucking rules even though e is just another constant and pi doesn't have special rules.
You people want me to swallow this bullshit? Come on. At least accept calculus is made up.
2 Posts / 1 Images
View this topic
>>
>>7806861
>Australian shitposting leaking fro /int/ and /pol/
Neomoot should just fucking rangeban you all.
File: ducklings-in-a-sink-big.jpg (56KB, 700x430px) Image search:
[Google]
56KB, 700x430px
Retard here.
Why is [math]H_{3}O^{+} + HO^{-} \rightarrow 2H_{2}O[/math] and not [math]H_{4}O_{2}[/math]?
6 Posts / 1 Images
View this topic
>>
Bcus energy and entropy and shit.
>>
Basically it's not a stable molecule.
>>
>>7806781
Thermodynamics basically says what atoms click together easiest. Just because the numbers of atoms add up, doesn't mean it's a low/stable energy state.
File: n-no_homo.png (116KB, 310x425px) Image search:
[Google]
116KB, 310x425px
<Stochastic analysis thread>
Question:
Is convergence in probability
[math] { plim }_{ n \to \infty } X_n = X [/math]
formally given by
[math] \forall( \varepsilon > 0).\ \lim_{n \to \infty } Pr \left (d(X_n, X) \geq \varepsilon \right) = 0 [/math]
?
And does anyone know Hairers work? I only read one of his paper last year when he got the price, and I get the gist of it - he does a sort of Tailor expansions for super non-smooth objects.
Anyone here working with that?
11 Posts / 3 Images
View this topic
>>
File: 1.13869_H4060086-Richard_Feynman_giving_a_lecture_at_CERN-SPL.jpg (110KB, 630x477px) Image search:
[Google]
110KB, 630x477px
Yes.
No.
>>
>>7806748
Why do you post a first year undergrad definition and then a research question? Are you trying to bait?
File: Organ-Transplant-Image-620x350.jpg (60KB, 620x350px) Image search:
[Google]
60KB, 620x350px
And so, /sci/, I have an assignment about grafting(organs, not plants...) and I was wandering, may your kindnesses show me some nice articles(not wikipedia, something more into it...) or even post on here a little about this subject?
3 Posts / 1 Images
View this topic
>>
I wonder if you could graft a bunch of hearts and lungs into one man do you think if you could he would have super endurance and could run forever as a result of all of his hearts and alll of his lungs????
>>
>>7806694
scholar.google.com
File: Capture.jpg (129KB, 1136x461px) Image search:
[Google]
129KB, 1136x461px
Why are physicists so completely fucking clueless about the vacuum catastrophe that it barely has a half a page dedicated to it on wikipedia?
Also general "how to harness vacuum energy for FTL travel" thread.
4 Posts / 2 Images
View this topic
>>
File: it-is-a-mystery.png (2KB, 480x360px) Image search:
[Google]
2KB, 480x360px
>>7806688
>>
>>7806690
why do pseudoscience topics get more coverage than the vacuum catastrophe.
>>
>>7806688
>the vacuum catastrophe
... is merely a mismatch between the Mathematical theory and the observed data, nothing to get one's pantiiz in a bunch.