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Archived threads in /sci/ - Science & Math - 304. page
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How do I purposely induce dissociation disorder? I've come to the realization that all social anxiety is a result of too big an ego. I want to dissociate from my ego so that I can once and for all kill my social anxiety. How do I get dissociation disorder? I've been abusing DXM (which works amazing for my social anxiety during the actual high), but it has yet to induce any dissociation disorders. What are some other methods?
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>>8062964
>he fell for the socialization meme
>>
>>8062964
You don't. I've been suffering from depersonalization and derealization for 14years. I literally feel like my brain and consciousness is disconnected from my body, it's like the front half of my head is empty and i'm viewing life from the back of my skull. It's miserable and sometimes I want to an hero.
>>
I will only say that it's possible, and you might not like where it leads.

Invest time into building awareness, and then cognitive structures to manipulate low level features of your mind. Subdivide and model it however it makes sense to you, plot out what avenues you can use. Build the systems, and then do the low level architectural work required. Pull he cover off the black box of the mind as much as possible.

You're headed on a course for misery.

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what does non-sentience feel like?
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>>8062887
you and I will never know,
which is kinda sad, really

pic somewhat related
>>
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>>8062887
How did you feel prior to being born, or even how did you feel as a blastula?
>>
>>8062899
i don't know. i can't remember such things, so i can't tell if i felt anything at the time.

I'd really like to know the exact reason for this?

Is it because everything is expanding at the same speed so there is no noticeable shift?
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>>8062870
I would guess because that's how much the distance is betwixt stars. Thousands of years of traveling that fast wouldn't produce a discernible difference.
>>
>>8062877
This
And everything else is spining along with us aswell. The stars aren't static
>>
>>8062870
The exact, absolutely scientific reason is
"SPACE IS FUCKING HUGE"
Like, beyond our comprehension huge. People just don't have the scope for that. They see space like it's portrayed in Sci-fi; imaginably large, but not constricting; big enough for epic battles. In reality, the stars are so far away that even at superluminal speed we would almost certainly never reach them within a year

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Are non stem majors paid too much in america? I feel like there are jobs americans make 10x to 20x the pay that the eqivalent worker in another country would make. For shit like working a xerox machine. Should most americans be bitchslapped?
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A person's pay is dictated by labor supply. Generally a company will pay their employees the minimum amount possible where they'll be able to maintain an employee who can do the job.

It just so happens that the amount required to keep an unskilled laborer is higher in a wealthy nation like America compared to a poor nation.

If you want to whine about somebody being paid too much, you should be more concerned about the CEOs and chairmen who basically just sit in an office all day and make more money in 10 minutes than you will make in your entire life
>>
>>8062865
>10 min
> entire life
Thats a bit of an exaggeration
Ppl earn more than 1000 dollars in their lives. At least in america
>>
>>8062847
The ugly truth demonstrated by the 2008 financial implosion in the 2008 is that the value generated by work was much less than expected and in many cases less then the salaries.

In the dive to the bottom with Indian level salaries you should prepare for national neo poverty.

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What is "mathematical intuition" and how do I get it?
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>>8062748
>how do I get it?
>he wasn't born with mathematical intuition

you don't, you wait for your reincarnation.
>>
Autism, and get more vaccines.
>>
I don't know whether gorillaposters are sincere or not, but I'll give you the benefit of the doubt.

A sincere answer is that you are either born with it, like the fortunate few, or you work hard & practice a lot. For #2 to work you clearly have to enjoy mathematics so that you can actually spend a substantial amount of your time/life to playing/practicing/experimenting with mathematics.

Which is the most difficult scientific field to do noteworthy experimental research in, and why is it Biology?
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>>8062729

Some biology/health science research has the distinct disadvantage of taking a long time (incubation times, etc). We've all heard horror stories of some poor PhD having a decade-long project due to failures & shitty grow times.

However, my 2c are for anything relating to human behaviour. The signal to noise ratio is absolutely astronomical, and frankly, I'm surprised we get the number of articles published that we do. See PNAS, complete joke of a journal publishing garbage like

>(barely) not statistically significant (p=0.052)
>a barely detectable statistically significant difference (p=0.073)
>a borderline significant trend (p=0.09)
>a certain trend toward significance (p=0.08)
>a clear tendency to significance (p=0.052)
>a clear trend (p<0.09)
>a clear, strong trend (p=0.09)
>a considerable trend toward significance (p=0.069)
>a decreasing trend (p=0.09)
>a definite trend (p=0.08)
>a distinct trend toward significance (p=0.07)
>a favorable trend (p=0.09)
>a favourable statistical trend (p=0.09)
>a little significant (p<0.1)
>a margin at the edge of significance (p=0.0608)
>a marginal trend (p=0.09)
>a marginal trend toward significance (p=0.052)
>a marked trend (p=0.07)
>a mild trend (p<0.09)
>a moderate trend toward significance (p=0.068)
>a near-significant trend (p=0.07)
>a negative trend (p=0.09)
>a nonsignificant trend (p<0.1)
>a nonsignificant trend toward significance (p=0.1)
>a notable trend (p<0.1)
>a numerical increasing trend (p=0.09)
>a numerical trend (p=0.09)
>a positive trend (p=0.09)
>a possible trend (p=0.09)
>a possible trend toward significance (p=0.052)
>a pronounced trend (p=0.09)
>a reliable trend (p=0.058)
>a robust trend toward significance (p=0.0503)
>a significant trend (p=0.09)

However, I'm sure this same garbage language is used in biology. I'm just less familiar with biology than behavioural/cognitive experiments.

Frankly, I'm not sure what can be done to improve the signal to noise ratio given the current system
>>
>>8062729
>>8062768

see
https://mchankins.wordpress.com/2013/04/21/still-not-significant-2/

for more of the trashcan language

tl;dr:
> troglodyte excuses for researchers try to convince themselves that they hadn't wasted 6 months of their life on a meme project
>>
>>8062729
I dunno...anyone looking at the impacts of neutrino fluxes on certain long-half life decays are pretty fucked.

I realize that the math community on /sci/ is pretty contemptuous towards "applied math" and even moreso to a toxic meme field like mathematical finance.

However, at the moment I'm interested in stochastic calculus/stochastic diff. eqns. in and of themselves. I'm looking for textbooks/material that'd be helpful for self-study (current in the workforce with a math undergrad, no graduate work).

How good is pic related for a general cover of stochastic calculus? I'm sure there's something better & more substantial out there.
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There are a bunch of Springer books with "Stochastic Processes" in the titles,
however, looking e.g. at quant sites on the web it's soon clear that all the fine machinery developed in math departments is not what's used and what is implemented is are "common sense" (for a broad reading of that term) math. I say in case you think "that's something where I can do interesting math and still get $$$". The practical side of this field isn't very mathy, I think. Not as mathy as you may thing.
>>
>>8063822
Not him.

I have read a lot about the quant job and what i have concluded so far is that people with VERY STRONG computational background and advanced knowledge in diff. eq. probs/stats if not just don't even try.
>>
>>8063906
I can't parse your sentence

You have concluded that people (with VERY STRONG computational background and advanced knowledge in differential equation) do what?

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Hey /sci/,

I really enjoy watching sixtysymbols when they talk about all sorts of space objects, feels really comfy. I know that I need differential geometry to learn general relativity, but until then what are the best astronomy pop sci books?

I just want to read about nebulae, clusters, supermassive black holes, and all that stuff.
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>>8062698

I'd recommend Einstein's "Relativity". If you're completely unfamiliar with the basics of the Theory of Relativity then I'd say its a bit terse. However, if you've had some previous exposure it's a great quick read that gives Einstein's own perspective on the "derivation" and "implications" of relativity, in a fairly nonmathematical perspective (some math is discussed, but anything beyond basic algebra isn't used).

This isn't the...
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>>8062745
I was looking more for something about astronomical objects. Not for education purposes clearly, just fun reading.
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>>8062852
Oh I see. I'm not too familiar with that, but sometimes when I want some background noise while working I put on Neil Degrasse Tyson talks I find on youtube. I realize this isn't what you wanted, but maybe it'd interest you the same (if you haven't already exhausted this).

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I'm currently a high school senior who is going to major in astrophysics, but what are some good fundamental readings/reviews I can take so that I am learning the basics before I enter college? I understand 4Chan is probably the worst place to go for this kind of advice, but sadly I don't have anyone to discuss such life preparation skills with, and I assume there are bound to be at least a few helpful minds on this board. What math is most crucial to entering astrophysics? General advice? Insights?

Thanks so much
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>>8062620
Astrophysics major in undergrad? The more you know.
Anyway, you'd want a solid physics and math foundation for that, I guess.
To that end, consider the sticky.
>>
>>8062620

whats the highest math you've taken? Physics?


>> Just graduated with astrophysics degree
>>
>>8062632
Well, I meant I plan on majoring in astrophysics after my undergrad of course

>>8062637
Up to Calculus, and I took AP physics

What did you cover during classes? Hardest parts? Sorry for so many questions, I'm just intent on this career

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Whats the evolutionary advantage of liking music?
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>>8062465
a trait doesn't need to be favorable, only not selected against.
>>
>>8062465
social cohesion via shared cultural artifacts
>>
>>8062465
None. Unless it's weeb music desu

JUST
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>>8062440
Is that supposed to be difficult?
>>
>>8062447
for kids like OP, yeah
>>
F = kx
Fc = (mv^2)/r

Wow 2 equations op so hard

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Is the "academia is awful" meme only true for soft subjects? Surely physicists, engineers, computer scientists and mathematicians are judged on results?

It does seem to be a true meme for many subjects. Anything that is economics or softer seems to require you to be at an elite university before people care about your work. Chemistry and biochemistry etc require shitloads of brainless lab work.
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Also, is the "most research is useless" meme true for sciences?
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>>8062412
Most academic research is "useless" in that it lacks either a direct or immediate payout. This is not to say that it shouldn't be done as blue skies research is what generally leads to significant advances, but such advances are neither quick nor dramatic the majority of the time. This need for long term support makes such efforts a generally poor target for industrial support which is driven by short term gains (an exception is the pharmaceutical industry where the necessary testing and approval regiment...
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>>8062431
yeah but even pharma doesn't support academic research because the reality is academic research doesn't have the same stringent reproducibility requirements as industry
if you're doing science for a company your results need to happen every single time
if you're doing science for academia it only needs to kind of work once, and you can crank out a paper and be done with it
amgen complaining about this issue: "In 2012, Amgen researchers made headlines when they declared that they had...
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Why do you think we haven't been visited by ayy lmaos?
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>>8062396

We are not ready yet.

Their science and their understanding of reality are too advanced.
>>
because we are the ayy lmaos

its the only logical conclusion...

+ayy lmaos should have visited us by now
+we have advanced technology both a long time ago and present day
+they believe we arrived here as bacterias on a meteor

just think about it. all this time we've been searching for ourselves
>>
same reason I dont visit africain tribes

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Every maths misconception is actually secondary school maths teachers' fault, because they don't think like formalists.

They talk as if mathematical objects really exist, and then wonder why students object to certain mathematical objects existing.

>"i" is defined as the square root of -1!
What does this even mean to a student? Nothing! There never was a general concept of "square root" given to them. And there's no reason to believe that just saying something at random won't break all of...
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>>8062347
>"i" is defined as the square root of -1!
That's not how it is defined in highschool
>>
The issue is that even accomplished logicians will defend a Platonist position (in fact, instead of ever defining a Platonist position, they declare the opposite as absurd and speak negatively of those who hold it).

But looking back at math reforms (pic related), you can't teach the general kid interesting conceptions, appearently. Probably, there will always be just plug and chuck and crying about it

https://en.wikipedia.org/wiki/New_Math
>>
>>8062415
>>8062347
Formalism was completely btfo by the time of Gödel and Tarski you goober. Most mathematicians and logicians subscribe to some version of structuralism nowadays. Some are reservedly platonist, I'll give you that, but even they are not even close to 'muh forms'

Highschool graduate here, i want to go into computer science, but im unsure of some things.

First, is your skill or talent as a computer scientist based on how many coding languages you know?

What i mean is will my chances of being able to do research with professors depend on my coding ability?

Should i start learning as many languages as possible right now?

Also what kind of graduate work will i be doing? I want to design new computers and devices like steve jobs.
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enroll in an online degree asap
>>
programming languages are a means to an end. what you should really learn is math.
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>>8062245
>like steve jobs.
First of all, kill yourself for wanting to be "like steve jobs".

That aside, computer science isn't only about coding, unless you're at some mediocre uni in the US, trained to be a code monkey programmer, in which case your coding ability might as well be the only criterion for being good at "computer science". Actual research in computer science will require apt mathematical skills as well, not just coding ability. Finally, designing...
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So I knocked my wife up and she's pregnant with twins. At week 10 our doctor offered a cell-free fetal DNA test to tell if either of the fetuses have any chromosomal abnormalities.
Everything checked out fine. No retards in there. The doctor also could tell us that they detected a Y chromosome in there, which means we're having definitely having a boy. However the test isn't able to say if we're having two boys. Since they aren't identical twins, there's a possibility that there's a female in there as well.
At this point the doctor says...
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>>
if you wanna take a quick peek...
>>
Two babies are cute
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>>8062204
If you had octouplets and knew that 7 of them are boys, would that make the eight an almost certain girl?
Stop your retardation right now.

I get how traveling near a larger mass than earth would cause a person on earth to see the traveler as taking a longer time, BUT...

In what scenario would a person on Earth see a traveler as only having been gone a short time, whereas the traveler may have felt like they have been gone for years?

All I can think is put the earth near a large mass or speed it up. But there's not much the traveler can do besides sitting still near no mass, right?
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>>
>>
>>

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I have the following differential equation:

[eqn] LQ'' + RQ' + \frac{Q}{C} = 230 \sqrt{2} \sin(\omega \pi) [/eqn]

I want to know if I plug this into a function correctly. I put [math]Q' = I[/math]. Then we get:

[eqn] LI' + RI + \frac{Q}{C} = 230 \sqrt{2} \sin( \omega \pi ) [/eqn]

If we then define the vector [math] \mathbf{y} [/math] as [math]y_1 = I[/math] and [math]y_2 = Q[/math]. We get:

[eqn] y_1' = \frac{230 \sqrt{2} \sin ( \omega \pi )}{L} - \frac{R y_1}{L} - \frac{ y_2 }{LC} [/eqn]

[eqn] y_2'...
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This is my function file:

--------------------------------------------------------

function dydt = ode5( t,y,R,L,C)

dydt = zeros(2,1);

dydt(1) = ((230*sqrt(2)*cos(100*pi*t))/L)-(R*y(1)/L)-(y(2)/(C*L));
dydt(2) = y(1);


end

--------------------------------------------------------

This is my script:

--------------------------------------------------------

R = ...;
L = ...;
C = ...;

tspan = linspace(0,1,10000);

y0(1) = 0;
y0(2) = 0;

[t,y] = ode45(@(t,y) dv5(t,y,R,L,C),tspan,y0);

plot(t,y(:,1),t,y(:,2))
legend('i','q')

--------------------------------------------------------

Now...
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>>8061854
>Where the hell did I go wrong?
wrote shitty code.
magic numbers
called your function ode5 for some reason
not enough matrices
>>
>>8061867
How do I improve? Please I want to learn.

If v'(x) = u(x), and y denotes some function, does v'(y) = y*u(x)?
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>>8061752
Sorry, meant:
Does v'(y) = y*u(y)?
>>
>>8061752
What is v? What u? What is x?

Does v' mean the derivative?
>>
>>8061759
Yes.

https://en.wikipedia.org/wiki/Notation_for_differentiation#Lagrange.27s_notation

v and u are both functions

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Dreams can actually change your personality. Why is this even possible?
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>>8061709
Did you just watch inception? It doesn't work like that in real life.
>>
i think it does

i had a super vivid dream last night about sucking my cats dick
>>
>>8061709
>why is it even possible for a mechanism's operation to change its structure

Rather than answer your question I rephrased it in order to point out how stupid you are.

So what are the opposing arguments to the motion "psychology is a science"
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Psychology lacks objective constants and baselines for scientific study because the human mind and the way it reacts to things does not have agreed upon definitions or guidelines.
>>
>>8061620
Mathematician here. I personally think that psychology is an important up and coming experimental science. It doesn't have the foundings that the other sciences have, but it's improving all the time, theories being replaced by newer ones, and once it does have a proper founding, I believe that it can really go far.
>>
>>8061620
It uses the scientific method therefore it is a science.

The problem is that many non scientific ideas long ago crept in to psychology and they have a hard time getting rid of those ideas.

However there are plenty of examples of good science in psychology. Get over it.

I know. embarrassing.

My Brother, bless him, has recently discovered Youtube (he's 46). Anyway, today he tells me..

>big lizard dinosaurs are fake
>the chinese created false bones for sale to museums
>they used whale bones or giraffe bones to create fake dinosaur blueprints
>there is not one single full skeleton of a large lizard-like dinosaur (t-rex etc)

Oh and my favourite

>"they"...
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>>8061590
No.

He's absolutely right.
>>
>>8061590
Why don't you go to your local natural history museum and have your brother talk to a curator?
>>
is it just (non-avian) Dinosaurs or does he believe all paleofauna (maybe even flora?) is fake?

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I'll keep this short. Does anyone know a doctor or treatment for alcohol induced dementia? My dad has got dementia literally out of nowhere from alcohol abuse.
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>>8061565
He bent his dendrites so hard for so long they can no longer bend back to shape so the neurons can communicate properly. If he tapers off drinking and quits it won't get worse. However, sudden stopping of drinking for an alcoholic can damage the brain.

As far as reversing the process, I'm not sure. cognitive exercises are usually the best course of action. Things like jigsaw puzzles for instance.
>>
He most likely has alot vitamin deficiencies including B12, folate, and thiamine. Thiamine is probably the most likely culprit for the dementia. He should probably go to a doctor to get IV injection of it for most benefit, but if he doesn't want to I guess you could try oral.
>>
>>8061663
I'm actually a doctor btw

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I think I've finally outsmarted, /sci/.
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>>8061555
The only thing that matters is the volume moved, so the force is the same in each bottle. 2', 5' and 10'? What freakin system is that?
>>
>>8061555
>non-metric units
>>
>>8061643
It's worse anon it uses BOTH metric and non metric

Forces is less as it gets deeper because air is compressible. That is if bottle is open at bottom

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What is actually a fallacy and why does /lit/ and /pol/ and other boards say it so much?

Does /sci/ care about fallacies?
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>>8061515
Faulty reasoning. Wikipedia is your friend.

/pol/ mentions it a lot as a counter-measure, to try to hide the fact that they use them in pretty much every post they make.

/lit/ mentions them because constructing philosophical arguments is all they have so errors in their arguments will be commonplace to point out.

Yes, /sci/ also mentions fallacies when they are having a more philosophical rather than scientific argument, and you should be able to construct such an argument and find the errors in...
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>>8061515
https://en.wikipedia.org/wiki/List_of_fallacies
>>
Should i respect people who cite fallacies then?

I'm not sure how to feel when someone just lists a bunch of latin words and says fallacy and argument over and over.

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hey sci,
what is the comfiest field of mathematics?
28 replies and 2 images submitted. Click here to view.
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>>8061499
analysis is pretty comfy
>>
>>8061499
Statistics
>>
>>8061499
fuck off with your autistic shit

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Ask for advice, give advice, cry and celebrate that you did or didn't get the place that you want.

(USER WAS BANNED FOR THIS POST)
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How hard does ee get in the final years?
>>
>>8061442
Anyone here doing enviro work? swiching majors after this year.
>>
>>8061757

sort of? i was in environmental science then dropped out for a couple years, moved around the country and now i'm majoring in geomatics. i think it's really interesting in any case. options are pretty open ended so "enviro work" is afterwards is totally an option depending on who you work for, though the opposite is also a possibility (resource extraction industries etc)

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I want to kill myself.

But since you die only once, I want my death to be something special. So please give me scientific suggestion for an orioriginal method of suicide. Best suggestion will be executed in public.
48 replies and 4 images submitted. Click here to view.
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>>8061361
Get helium tank
Tie uninflated balloons around neck
Inflate balloons

Die or fly into space
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>>8061361
don't do it in public
people already got enough problems, they don't need to have their week ruined by seeing some angsty asshole commit suicide in a flamboyant way
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>>8061518

File: combinatorics.png (17 KB, 300x225) Image search: [iqdb] [SauceNao] [Google]
combinatorics.png
17 KB,
What's a good short combinatorics book that covers all areas of combinatorics at least to a small extent?
19 replies and 1 images submitted. Click here to view.
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>>8061217
>>>/adv/
>>>/r/
>Doesn't read the sticky
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>>8061225
Fuck off. This is neither a homework, nor a career question thread.
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>>8061228
>never bothered seeing what this link is
https://sites.google.com/site/scienceandmathguide/

File: 1461734592027.jpg (48 KB, 1057x611) Image search: [iqdb] [SauceNao] [Google]
1461734592027.jpg
48 KB,
If we are truly living in a multiverse and our world is one in an infinite variety of expanding and collapsing universes, is it possible for our body and brain to be reborn in a parallel universe? Not as in us being reborn as a buddha and remembering our previous lives, but a carbon copy of us like a clone. Same DNA, same body, same neurons, no memory of past lives, just a different universe. Could this be a form of reincarnation or am i just being autistic?
13 replies and 4 images submitted. Click here to view.
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File: yeye.jpg (6 KB, 192x263) Image search: [iqdb] [SauceNao] [Google]
yeye.jpg
6 KB, 192x263
>>8061147
>is it possible for our body and brain to be reborn in a parallel universe?
Why don't you go ask Jesus.
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>>8061166
Not literally our brain, if there is infinite universes then some of them are bound to be similar to ours... and eventually a version of ourselves will be born. Not literally us but might as well be us, if we are nothing but neurons and chemical reactions an exact clone is technically us. No time travel or wormholes just the power infinity..
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>>8061147

>could this be a form of reincarnation

>where "I" is an ill-defined term and there is no persistence of consciousness

Good news Anon, "you" are reincarnated as a wave on the pacific ocean every day.


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