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Archived threads in /sci/ - Science & Math - 178. page
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File: bigpharma3.jpg (67 KB, 600x374) Image search: [iqdb] [SauceNao] [Google]
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Does it actually exist?

We often hear things like
>This study was funded by big pharma/the government/big oil/the green lobby so the results can't be trusted
but how true can this be? Surely if the logic in the paper follows then it doesn't matter who funded it - whether or not the results happen to be what the funding agency wanted is irrelevant. Where can the bias come from?
>>
you can use statistical analysis of your results to get whatever result you want, take a look at data dredging
>>
>>8295979
It honestly doesn't matter because the data

>>8295988

always shows through anyways

it just makes it INSUFFERABLE to go through

Imagine reading paper after paper and saying it's shit only to have some idiot play wordsmith and spin it another angle

It's basically where politics come in, and that's why bias is very important to take into consideration. The data is there, but you have to see through the lies and read between the lines
>>
>>8296013
>it just makes it INSUFFERABLE to go through
This, for example:
https://en.wikipedia.org/wiki/Study_329

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Are there any diseases that we have absolutely no idea about how we might try to cure them?

We now seem to have ideas (which may or may not actually work - but at least we have ideas and we can test them) for curing everything.

Is there anything which this doesn't apply to?
>>
>>8295926
Alzheimer's
>>
>>8295927

But there's a fair amount of work going on relating to Alzheimer's; particularly relating to amyloid beta.

It might not work, but we do have *an idea*.

I mean things where we don't even have a good idea of where to start.
>>
>>8295954
no. we arent fucking cavemen.

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TEST

$$asdf$$
>>
[latex]\frac{1}{2}[\latex]
>>
>>8295866
$\Latex$
>>
$\frac{1}{2}$

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>mfw trying to write a proof

Is there an at least somewhat systematic way a beginner can practice and get good at writing proofs? Or should I just accept that I'm a hopeless brainlet...
>>
>>8295812
Take very simple proofs and write as many as you can. For example, prove to me that multiplying and odd and even number will always be even.
>>
>>8295812
Get a book like A transition to advanced mathematics or How to prove it and go from there. Look at proofs and copy how they do them.
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>>8295819
Let n be an even number and let m be an odd number.

[eqn]n\times m = \text{Proof is trivial.}[/eqn]

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So I've been watching Star Trek: Voyager (No, I don't know why), and while there's a lot of dumb things in this show, there's one thing I've come across in season 5 (I don't know why I've made it that far either) that's really bugging me.

So to not bog down in details, a member of the main cast gets afflicted with Space Medical Problems. The medical staff on voyager don't know how to deal with these particular problems, and they don't have time to read about it, so they decide on the only logical course of action: to...
>>
>>8295674
yeah no thats bullshit
the nazis figured out the relationship between smoking and cancer, among many other medical advances.
we dont ignore those discoveries
>>
>>8295674
Not using the data means you are actively making it so those people suffered and died for literally nothing. Why would you do that
>>
>>8295674
Ethics slow down progress, but without ethics we can easily lose what makes us human.

That's the gist of it.

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If entropy always increases then why arent we still a soup of quarks
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>>8295301
Fun fact: we might live in a universe with continuously decreasing entropy
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>>8295301
Because the universe cooled off too fast.
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>>8295301
Because the universe is getting bigguh faster than it makes entropy nigguh

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how come someone that has a PHD in economics and an ivy league education becomes marxists?
>>
what do you think"" educational institutions"" are for? leftist indoctrination
>>
>>8295315
this guy would claim otherwise

he's either a heeb or has too much empathy
>>
>>8295298
Because in a vacuum, communism is the best economic model

That and all universities were founded by leftist Marxists from Western Europe.

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What's up with dark matter/energy?
Do we really not know what 95% of the universe is made of?
What could it possibly be?
>>
something something quantum mechanics, something something consciousness

commence autism
>>
>>8295287
So called gravitons.
>>
It is possible that they're doing the math wrong, and the universe is mostly just 'normal' matter?

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Four prisoners are arrested for smoking weed, but the jail is full and the jailor has nowhere to put them. He eventually comes up with the solution of giving them a puzzle so if they succeed they can go free but if they fail they are executed.

The jailor puts three of the men sitting in a line. The fourth man is put behind a screen (or in a separate room). He gives all four men party hats. The jailor explains that there are two black hats, and two white hats; that each prisoner is wearing one of the hats; and that each of the prisoners only see the hats in front of him...
>>
Try to solve.
>>
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Gang up on jailor
>>
If nobody figures this out, will you explain?

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Get in here faggots:

>http://www.arianespace.com/mission/ariane-flight-va232/

T minus 00:18:00
>>
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Bezos Bump
>>
Stream is Live

T minus 00:06:39
>>
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>Ariane5
>13,000kN Thrust

Pic related

How much maths do I need to start quantum mechanics? Lets assume I have essentials such as calc 1 and 2 only.
>>
>>8294518
To start it's mostly linear algebra and real analysis (I don't know American college memes).
Once you get into QFT you'll need complex analysis.
>>
>>8294518
>Basic calculus
>Some simple linear algebra
>Some basic vector calculus

That's pretty much all you need, at a graduate level you'll probably need a bit more LA.

>>8294553
>real analysis
>QM
Nigga, wat?
>>
>>8294518
banach space.

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Which one do you believe takes a more prominent role in peoples personalities. Personally I believe that nurture is the biggest role. The best way to raise a child is to teach them that waiting for a greater reward is better than having instant satisfaction as tested in the Stanford marshmallow experiment.

What is /sci/'s thoughts on this?
>>
This is gonna be a delicious /pol/ vs reddit shitfest. *Grab popcorn*
>>
This is retarded meme that is decades old. It's always about gene-environment interaction. There is no one or the other. It's always both.
>>
Nurture is more important

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>theory of relativity is almost 100 years old

I thought Science was supposed to advance knowledge not just jerk off with it?

Why are today's scientists so useless?
>>
>>8294361
Well yeah it sucks.
>we live in an era where you can get a Nobel Prize for inventing the blue LED
Don't get me wrong, it's a fine invention, but not a discovery. The future of physics doesn't look so good.
>>
>>8294361
It's more like Einstein was 100 years ahead.
>gravitational waves
>>
>>8294361
its the retarded threads that hold the science back

sage

I don't perceive Neil deGrasse Tyson as particularly intelligent. Why is he special?
>>
>>8294352
Unlike most astronomers, he can appear on TV and not put the audience to sleep.
Which is a good thing, those NASA bucks don't come from nowhere nigguh.
>>
>>8294352
Melanin.
>>
He is like any average experimental astrophysicist, except he does not have autism.

File: 280.jpg (265 KB, 1280x960) Image search: [iqdb] [SauceNao] [Google]
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Do you want the universe to restart in a big crunch or slowly fade into nothingness (heat death)?

The latter sounds quite comfy to be quite desu.
>>
>>8294281

Couldn't a big crunch just result in the universe being exactly the same so everything you do is repeated forever
>>
>>8294317
The chances approach zero.
>>
>>8294324

But why would the conditions be different a second time

ESO (European Southern Observatory) discovered an exoplanet around Proxima Centauri (4 light-years away only -- nearest star). Earth-like mass and within the habitable zone of the star. Presence of atmosphere unknown, but plausible. Next generation of telescopes (E-ELT, etc) will be able to find out.

>https://www.theguardian.com/science/2016/aug/24/earth-like-planet-found-orbiting-our-suns-nearest-star-raises-hopes-for-life-proxima-b
>http://www.bbc.com/news/science-environment-37167390
>http://www.lemonde.fr/cosmos/article/2016/08/24/une-terre-temperee-autour-de-notre-plus-proche-etoile_4987469_1650695.html
(most complete general public article -- but in french)

Ayy lmaos are closer than we'd think
>>
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What if it's already inhabited by an advanced civilization. Let the intergalactic wars begin.

>mfw scifi movies where actually training videos for war with the ayyy lmaos
>>
Transposing my post from /news/

I studied physics in undergrad and i grew to become numb to these headlines. It seems like everyday we're finding the newest most earth-like planet yet. This however is pretty cool because Proxima centauria is our closest fucking star. So we've found a new home right? Not quite yet.

Just because a planet is in the 'habitable zone' doesn't mean the planet is habitable at all, it just means it's in the ring where liquid water COULD be found on the planet. It could have toxic gases and oceans, constant tectonic movement leading to unstable ground and/or volcano explosions or any number of completely unimaginable things that would make it hell-on-earth so to speak.

Well let's stop being pessimists for a second and think about what being our closest star actually means. Can we travel there soon?

First let's consider the speeds. The fastest humans have ever gone is 40,000km/h.

"The current human speed record is shared equally by the trio of astronauts who flew Nasa’s Apollo 10 mission. On their way back from a lap around the Moon in 1969, the astronauts’ capsule hit a peak of 39,897km/h" http://www.bbc.com/future/story/20150809-how-fast-could-humans-travel-safely-through-space.

With this in mind, and to gain some perspective, let's imagine traveling to mars. In july 2018 we're apparently going to be pretty close to mars at only 57 million km. http://www.universetoday.com/14824/distance-from-earth-to-mars/

57,000,000km / (40,000 km/h) = 1425 h = 59 days which is about 2 months!

That's not very long at all... But keep in mind that 40,000 km/h was the fastest that Apollo 10 ever went. It obviously had to accelerate and decelerate.

>>
So let's try and get a lower bound for how long it would take to visit this planet. The planet is 1.3 parsecs away.

1.3 parsec = 4*10^13 km

4*10^13 km / (40,000 km/h) = 1,000,000,000 h

So at the max speed appolo 10 hit, it would take 1,000,000,000 h = 114,000 years

Well... that's not very comforting.

What about an unmanned voyage? Like a satellite or some shit.

To my surprise, the fastest thing we've ever launched was voyager 1. Around 2013 it was clocked at 17030 m/s [https://en.wikipedia.org/wiki/Voyager_1#Exit_from_the_heliosphere]

17030m/s=61,000...

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Get in here! At 2:55 EST Philip Lubin will be presenting the most recent results of the "Directed Energy for Interstellar Study." The send shit to a star using lasers study.

Livestream.com/viewnow/NIAC2016

With today's proxima centauri exoplanet announcement, it should be pretty interesting
>>
neat, I don't know anything about what you just said but I'll watch it
>>
>>8294342
It's over already, though you could rewind it
>>
>>8294232
>>8294342
>>8294345
Kek

File: real_analysis.png (74 KB, 983x488) Image search: [iqdb] [SauceNao] [Google]
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How much time do you spend on studies? How does one stay on task for long periods of time?

I notice that it is often hard for me to spend long periods of time focusing on Math, and I often need to take frequent short breaks or walks when I am doing hardcore studying.

Sometimes, I am not able to get an "real" work done, and instead focus on small semi-pointless-productive tasks that do not require me to think hard.

For example, I should be reading real analysis and numerical analysis textbooks and be working on problem sets right now, but I spent...
>>
Yes, pretty much.
>>
>>8294442
This
>>
>>8294442
ditto

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>>
-1/12
>>
>>8294068
The fact that the rationals are countable like the naturals but can be infinitely divided like the reals blows my mind.

What even are the rational numbers? How can they have both of these properties at the same time? Like holy fuck, just this makes them more interesting numbers than the reals. I wonder why most people don't focus on the rationals when there are obviously many hidden theorems lying in this weird relationship the rationals have with the naturals and the reals where it is like an intermediate state of both.
>>
>>8294068
The invention of the atom

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How do I keep these fuckers from looking like mushrooms or weird stickfigures bending over?
>>
>>8294047
Whoa, make it simpler. Seems like it took you 10 s to draw that.

_O_

Without the bottom of the O.
>>
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This is how I draw omega, why you add the neck?
>>
>>8294047
Any tips on Beta not looking like a weird B and Epsilon looking decent?

is there a cheap way to estimate $\left \| A^{-1} \right \| = \max_{x \ne 0} \frac{ \left \| A^{-1} x \right \| }{ \left \| x \right \|} \newline z= A^{-1} x \newline A z = x ?$
>>
>>8293936
$\left \| A^{-1} \right \| = \max_{x \ne 0} \frac{ \left \| A^{-1} x \right \| }{ \left \| x \right \|}$
$z= A^{-1} x$
A z = x [/math]
>>
>>8293940
Dose this help?
https://en.wikipedia.org/wiki/Operator_norm#Equivalent_definitions
>>
>>8293979
On $\mathbb{R}^{2}$ could be something like $||v||=1\iff v=e^{i\theta}$ so you have $||A^{-1}||=\sup_{\theta\in [0,\pi)}||A^{-1}(\theta)||$.

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Thoughts on this?

http://nymag.com/scienceofus/2016/08/is-elysium-healths-basis-the-fountain-of-youth.html
>>
>>8293914
>is Elysium healths basis the fountain of youth

No
>>
> grandoise claim

Sounds like someone's research funding is running dry and he is desperate for a golden parachute.
>>
>>8293914
>An MIT
Is the letter M a vowel now?

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Any of you use this?
>>
>>8293822
Good for Mathematics, OK for anything else. Textbooks are (obviously) better.
>>
>>8293822
Me. It's pretty good up to a certain point.
After that it's preferable to just study from somewhere else.
>>
Yes. It's a great way to refresh math concepts, and even better when doing it with someone else. I don't know about the other sections, but the math modules do what they intend to do.

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Hi. I heard gold comes from the degradation of another transuranium element. Which one?
>>
I thought this was the science board. nobody can help me?
>>
I'm no expert but I don't think anything degrades into gold. Nuclear transmutation allows you to make gold from say lead but that doesn't really happen naturally.

Gold is made in the 2nd+ generations stars.
>>
>>8293867
gold and lead are very similar and lead comes from uranium so gold must come from another transuranic element

Do you really believe that we can all think and understand sciences ?

Regardless of IQ which is still proven inaccurate, concretely we know that some people can't into math or physics but I've always believed that these people are experiencing a "residual ignorance", because they hadn't been paying attention before or because they forgot basic principles to understand a theorem, as science (s) is based on simple theorems to greater ones. My idea was that they only needed to fill a gap of knowledge, or to pay attention during classes, etc.
But...
>>
>>8293587
btw I know that there's already this one but I think it's similar and not the same question there.
>>
> regardless of IQ which is still proven inaccurate

It's one of the most tested, statistically reliable and valid concepts in the social sciences.

Come on.
>>
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...

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How difficult is studying Astronomy in University?

I just noticed that to study a Bachelor of Science with a major in Physics has an entry requirement that I meet. I've always been really interested in Space, but never thought I'd get good enough grades to get into a course for it at a University.
>>
>>8293666
Are you interested in space, or are you interested in astronomy?
>>
I'm doing a placement at Manchester Uni doing astrophysics. It's shite, it's more computer programming than anything, just droning through coding programs for meaningless astroshit. 0/10 do not recommend, there's better physics out there
>>
>>8293696
I'm interested in space, and how it works. Is that much different from what astronomy is?

>>8293697
Oh. I'm not usually interested in Physics and stuff, I guess it's the space part that draws me into it, but I have studied a bit of computer science and programming.

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Would it not benefit humanity in the long run, considering we know more about evolution than ever, if we had a form of "science based" government that forced the "elites" or the "alpha genetic" individuals to mate so we can control our evolution to make us as humans smarter/stronger in the etc... In the future of our evolution? Just I thought
>>
>>
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Just let the chinks genetically engineer 250 IQ superhumans. Us non-engineered subhumans need not breed at all.
>>
>>8293651
The idea of genetic determination is pretty much taboo. Eugenics is seen as a massive violation of human rights (even if victimless) and there's a drive to focus on some common human essence that is somehow still disconnected from genes, regardless of capability, and level the field (remove hindrances, slacken standards, control language) for those less able rather than celebrate those more able.

These are the times (in the West). Check your privilege.

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What's the science on egg yolks? Are they unhealthy?
>>
>>8293639
>What's the science on egg yolks?
They come out of your mom's vagina.

>Are they healthy?
Only if you shove them up your ass you disgusting faggot.

This is not /sci/ material. Go to >>>/fit/
>>
Dosage makes the poison
>dietary science
>hard science
>>
>>8293643
>nutrition science is not science
>p-pls stop disturbing my 0.999...=1, sun of ice and lava, IQ shitposting, undergrad / high schooler circlejerk and /pol/ bait threads

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>1935+81
>he fell for the entanglement meme

You do realize that Bell's experiments prove nothing, right? They have so many assumptions they're completely invalid.
>>
>>8293586

Its fun to believe in magic though
>>
>>8293586
Could we pretend that this isn't a bait thread because I'm genuinely interested.

Is there some resource that I could look at for an upper-year undergrad physics student which would explain Bell's theorem in detail? I've even looked at the original paper but to be honest I'm too lazy to go through it myself, it's a bit too dense.
>>

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I accidentally got a computer science degree. What are some good masters degrees? Can I do a masters in engineering?

I don't want to work. Thanks /sci/.
>>
1. Machine Learning
2. Data Science
3. Bioinformatics
>>
bait
>>
>>8293537

Start working a masters will not really benefit you unless it's in a specific career direction and even then you're better off getting it after you've started that career

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