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Archived threads in /sci/ - Science & Math - 297. page
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What's the neatest planet/moon?

[spoiler]besides Earth[/spoiler]
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>>8075393
Eris because its named after the best goddess
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>>8075393
Neptune

I mean just look at how pretty this motherfucker is
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>>8075393
>What's the neatest planet/moon?
>besides Earth

Luna

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Chemistry question: Is there any household substance that has calcium in it that I can purify? I need some for a project I'm working on.
>>
Are you asking for pure calcium? You're better off trying to get an intermediate. What are you trying to do with it?
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>>8075296
http://www.ebay.com/itm/like/181573822745?lpid=82&chn=ps&ul_noapp=true
>>
milk

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Humans are getting fatter and fatter.
As soon as they have the economic ability to eat all they want, they will almost always choose to do so.
Is there any stopping it or is humanity destined to be a gluttonous blob?
>>
Excuse me, but gym and self-esteem also comes with money.

(Well, sometimes...)
>>
I'm in biotech and I like to think that maybe a century from now we'll be regularly editing to improve the human genome.

As long as you're not editing to improve metabolic efficiency, and adding genes so that say, a person packs on more muscle, humans would be able to eat more without getting fat.

I suppose you could also edit to purposefully decrease metabolic efficiency as well, so you'd eat more to maintain the same body you got right now.

Of course the chief ethical issue with this, assuming we can wield the tool reliably, is that...
>>
>>8075215
>humans would be able to eat more without getting fat.
This would be fucking horrible.
Imagine all of the wasted resources coming from creating all that food. The only thing stopping humans from eating 24/7 is fear of their health and the fact that they die early if they eat too much.
If suddenly everyone was able to eat as much as they wanted the amount of resources needed to do this would completely wreck our planet.

I hope we never find a "cure" for fatness...

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How many generations does it take for unique genes from an ancestor like Genghis Khan, to be overwritten or diluted to the point of non-existence?

Is something like that possible, or will there always be a little bit of Genghis Khan in the human race?
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>>8075092
impossible due to mitochondrial DNA
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>>8075116
What part of it is impossible?
>>
>>8075125
mitochondrial DNA stays the same

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Is it even worth colonizing other planets?
Seems to me like it would be way cheaper to build colonies on asteroids and small moons, to avoid dealing with gravity wells and atmosphere of planets
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>build colonies on asteroids
Asteroids are really fucking small.
They have almost nothing on them.
And they spin way to fast to be useful.
>build colonies on small moons
There are several gas giant moons people can make a case for.

Another common suggestion is comets.
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>>8075056
Seems like we should just build towns in the desert
>>
The advantage of planets is the gravity and atmosphere.

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>>8074960
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>>8074961
Have you done any research? I just wanna know what it's like. I think one of my teachers is trying to make me his golden tendie boy, so I'm trying to figure out what I'd be getting myself into.
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>>8074966
Not the same anon, but research is completely different depending on what field you go into. I'm an undergrad doing molecular dynamics. Doing something computational is great because in some cases you can work from home if you need. When I spend a month not getting anywhere with a simulation, though, I feel like an unproductive piece of shit.

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Would it be possible to automate the job of a mathematician by using some sort of logical constraint satisfaction technique, whereby axioms are combined together in all possible combinations to form proofs, and then proofs can be combined together to get more proofs? Could we just hook this technique up to some super computers and map out all of mathematics in finite time?
>>
ya
>>
>>8074921
Sure. Now do it.

Oh wait, what's that? You can't?

I guess mathematicians will be keeping their jobs, topkek.
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>>8074921
>Could we just hook this technique up to some super computers and map out all of mathematics in finite time?
No. It would take forever to do that.

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I have an IQ of 120 which is probably lower than most of you 140 iq geniuses on this board, but I've recently become completely engrossed in the possibility of reality being simulated. It seems to me to be more likely than not, but my only reference material has been some shitty 4chan posts and some YouTube videos, half of which devolve into 9-11 illuminati, the Jews did everything clusterfuck.

I am terribly interested in learning more about this topic though, and I'm certain you guys could enlighten me on the subject. Just please, let's keep it intelligent...
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>>8074919
People hate it, but Wikipedia would be a good start to see the ideals and have some sources for further reading.
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>>8074919
>iq of 120
People still fall for the iq meme? IQ != Intelligence
IQ is just pseudo-scientific bullshit
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>>8074954
Was just using it as a reference point to state I don't fully comprehend the intracies of a lot of stuff you guys talk about on this board.

I am well aware of the meme argument people have about IQ not being viable.

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Will the world end in the next 100 years?
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Big Rip.
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The world? Nah, but the possibility of humanity ending itself in the next 100 years is very real.
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>>8074916
The world will end when Disney determines there is no more profit to be had.
Search your heart, you know this to be true.

If I travel to Jupiter and drop a lit match into the atmosphere, would it start the methane on fire and create a dwarf star?
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If i detonate a nuclear bomb in Earth's Oxygen rich atmosphere, will it burn all the oxygen away?
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>>8074883

No, Jupiter has already tons of thunderstorms.
>>
Asteroids burn up in jupiters atmosphere all the time.

Why do people care so much about space travel? What do they hope to find?
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an escape from crippling depression
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>>8074860
Hope
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>>8074868

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So apparently it's not known if $\pi^{\pi^{\pi^\pi}}$ is an irrational number.
ITT: We find out.
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(-1) = -1
(-1)(-1) = 1
(-1)(-1)(-1) = -1
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>>8074729
Is that suposed to go on forever or is it just pi^pi^pi^pi?
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>>8074744
OP here, it's just 4.

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I'm here setting up a computer while I listen my mother and my sister's bf talk about how ETs are actually demons that come from another dimension, and in a military base they came suddently from the ground and ate the scientists there (and those demons are reptilians), and they claim it has a proven scientific source.

They just don't shut up, I want to punch them, should have I posted this on /x/?
>>
More:

>The superior race of aliens is in the US, and the inferior one in Russia
>Putin knows who the Illuminati are and wants to shut them down
>>
>>8074593
I envy you. I wish the people around me would talk about such interesting things. Instead they only talk about parties and sex. Fucking dimwitted pieces of shit.
>>
Wow OP. So there are two ways to go about doing this:
1. Show them they are fucking wrong
2. Brush it off and ignore it

Option 1 is the 'right' thing to do, but you will obviously get on their bad side. Unless you're lile Carl Sagan tier. Option 2 takes less effort.

>>8074602
You must have shit friends. My friends talk about AI, physics, and science shit. Get drunk with scientists more often it is great.

what should i read after i've surveyed most methods in introductory numerical analysis texts? where do i go from there if i want to keep on studying numerical methods? i don't want to learn about it for any particular reason.. i just think that's what i do best and it would be good for me to learn more
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>>8074533

Learn how to use a shift key
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>>8074533
If I know about numerical integration can I say that I know numerical analysis?
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>>8074545
can u give a good bound on ur error?

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Is laziness low blood sugar? Because I am not tired or anything, but I am feeling laziness when I should be reading a simple text.
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>>8074497

It's just a lack of will.
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>>8074501
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>>8074501
>yes or no
>bla bla bla

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>>8074469
http://tocrofl.tumblr.com/
this shit gets me all the time
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>>8074485
Aww. I'm too stupid to get any of them.

Thanks /sci/
>>
>>8074485
Jesus.

The only one I know for certain is, "Brainless but Multi-Headed: Decision Making by the Acellular Slime Mould Physarumpolycephalum)" because I studied them and they are quite amazing at how they do mazes and remember doing them without actual neurons.

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What kind of laptop and software does /sci use?
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>>8074210
Window 7 + Matlab/Maple/Visual Studio C++/Python
>>
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>>8074210

Asus transformer T200 + windows 8.1 (soon windows 10) + Office 2010 + a lot of ebook

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how do you compute an infinite series to prove it is equal to 0 ?
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>>8074207
using clever trickery w/ manipulation of arabic symbols on a piece of paper
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>>8074211
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>>8074211

how did we manage to calculate trillions of riemann zeta function zeros with a piece of paper ?

Why do people believe the moon landing was real since we haven't been back since the 70's. Plus you can see that the rock in the photo totally has a marking on it indicating its a prop.
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you're a prop
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>>8074157
He's an NPC.
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> thinks seeing a rock with C written on it is proof that its fake
So what ? We have rocks thats stuff written on it here on Earth, but you don't think Earth footages are fake do you ?

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What's the minimum math knowledge I need before taking a Digital Signal Processing course. Do you think three months and two weeks is enough to learn the basis if I work 2 to 3 hours a day? It's some kind of life defining choice I'm making right now.
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I mean: are complex numbers & Integral enough to start or I need more basis...
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>>8074021
Do you know what Fourier series, Fourier transforms, Laplace transforms, discrete Fourier transforms, and FFTs are?
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>>8074021
Idk

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Hello I need information for a book.

Do graduate students in chemistry/biology/similar things help perform animal experiments when those experiments actually happen? Like if a university developed a new burn medicine and needed something to test it on, would they use grad students to test it on pigs or something? Pic unrelated.
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>>8074011
Yes that is done in research in some (bio)medical engineering fields. But I think mice are more common test subjects than pigs. I haven't really seen how it is handled in practice as I personally worked with much more technical computery stuff but some neighbouring department did, I think.
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>>8074011
In the biomedical fields, the grads don't "help". They are actually the ones doing the majority of the thinking and lab work. The Profs are merely advisors. By your second lab year as a PhD student, you probably know more about your research than your supervisors.
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>>8074011

who is this fluid druid?

Do you believe that the human brain is truly capable of "free will"? That is to say, our neurons which objectively have no choice but to fire in response to voltage differentials can make up a larger machine that is capable of responding differently to the exact same stimuli?
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>>8073991

> objectively

Shit meme

Cogito ergo sum, you faggot
>>
Nope. We're just flesh computers running slightly complex survival/procreation algorithms. Obeying instructions encoded in binary in our DNA.

Which is fine, because if all we are is objects, then that's all the free will we could ever hope to have- will that was predetermined by a part of our physical selves.
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>>8073995
What a terrible post.

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I have worked out three key reasons why space travel stagnated and I don't think the end of the Cold War or even cost has much to do with it.

1) The lack of super-heavies. Saturn V worked, it could have gotten a base on the Moon and even to Mars. Unfortunately everyone balked at the cost. We then started dicking around with LEO spaceplanes that didn't do much and didn't even work good, thus wasting about 50 years. The Russian story was even worse, theirs plain blew up ensuring that they could never be a competitor to the USA in deep space. People say the...
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>>8073976
I know I said cost doesn't have much to do with it but then said people didn't want to pay for Saturn V but what I mean is that if they had a good reason to pay they would have so cost wasn't the core reason.
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>>8073976
>that ended in 1991

i dont care about meme travel but the wall fell in 89 m8o
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>>8074032
Whatever /his/ still way after 1972.

what is the commonly accepted idea/principle/axiom, that if proved false, would single-handedly revolutionarize the most science/maths ?
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>>8073958
Theory of relativity, we'll overcome the Judenphysik once and for all
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P not equal to NP
>>
theory of intelligent design

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Hello /sci/,
My neuroscience exam is on Wednesday and I don't think I covered everything and I feel uneasy about it. Any neuroscientists here to give quick help?

>>
How many hours do you study a day?
>>
>>
>>8073948
Most of the day. 6 hours.

So I'm finishing my third year in bioengineering with a minor in chemistry and I'm thinking about continuing in Nanobiotechnology. I've always made my study choices regarding my general interests, not with a specific job in mind.
Now I'm curious about where I could land, what kind of jobs can i expect to apply for or land with a degree in bioengineering specialised in nanobiotech?
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>>8073925
Big pharma, insilico drug design, screening, docking.
>>
>I've always made my study choices regarding my general interests
>what kinds of jobs can I expect to apply for
>nanobiotech

You're a gambling man then? That field basically does not exist in industry yet. Unless it catches on commercially soon you can expect to do nothing in nanobiotech
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>>8074952
i guess i am attracted bu the "futuristic" aspect of nanobiotech... regardless, this specialisation has been available for over 10y in my university so surely there's a certain job niche for this field

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Taking differential equations course, this is text:

Ordinary Differential Equations, Zill, 9th edition

is this good?

besides book does anyone have any online resources to help with course (eg khan)??
>>
i think the real name of the book is
First Course In Differential Equations Ed: 9

not sure why they listed it with a different title
>>
>>8073867
>9th edition
>is this good?
No.
>>
You'll find this useful.
http://users.math.msu.edu/users/gnagy/teaching/ode.pdf

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Why did the soviets have such a high failure rate?
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>>8073813
Fear rarely gets things done successfully
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>>8073813

The scientists had literally no say in anything. When your fascist leader says launch, you launch even if you know it will blow up.
>>
Government, an incompetent government

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Suppose some powerful interest groups enact policies that are extremely unfavorable to older generations, is it safe to say that once they die off, their offspring would willingly accept those unfavorable polcies as "normal"?
>>
If you doctrine new generations your twisted ideas, they can even kill people thinking they're doing something good.
>>
North Koreans love Kim... They worship him like a god, of course it would seem normal to them

Refer to gullivers travels
>>
Unless these policies cause the younger generations harm. This is especially the case with mass immigration, which will lead to and is causing reactionary (and perhaps even revolutionary) thought across the West in the younger generations.

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What should a mathfag know about computation and computation complexity theory?
What are the most important concepts to know, apart from the undergrad CS stuff?
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>>8073794
Just remember, O(log n) is the best my manno.
>>
>>8073794
>Combinatorics (because it leads onto) combinatorial optimization
>Numerical analysis
>Variational principles
>Algorithmic Graph Theory
>>
>>8073794
>apart from the undergrad CS stuff?