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Archived threads in /sci/ - Science & Math - 123. page

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Is an (artificial) permanent bliss state is sustainable for the human body, chemically speaking?
17 posts and 2 images submitted.
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smack
>>
Probably not. For the same reasons we can't live beyond about 500 doses of LSD. Brain is toast.
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>>9130640
sauce?

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Why?
Why!
Why....
20 posts and 5 images submitted.
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>>9130593
What needs to be done? Could you be more specific Alan "homosexual autistic faggot" Turing? Because to me modern world seems pretty complete.
>>
>>9130597
You need strong prayers and forgiveness***
>>
If you ever met him in real life you probably wouldn't ask

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Does anyone know of a chemical reaction with clay particles that will turn clay into a hard rock-like substance, like concrete? I'm not looking for additions of other forms of cement like lime or portland TO clay. I'm looking for something that can TURN clay into cement.
5 posts and 1 images submitted.
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Just b urself
>>
What are you trying to do?
The only way I can think of to do a clay cement would be to bake your entire wall by buidling a kiln around it after laying the bricks with clay instead of mortar.
>>
>turn clay into a hard rock-like substance
You mean like... firing clay?

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how do you become a hard worker? Am I fucked if I'm just not smart enough? Would a person with an ...

I've heard before that you need an iq of 115 to graduate college with good grades or get into graduate school? Is this true for almost all? Would most others be pushed to hard in the vast majority of cases, I feel a bit absurd even entertaining the idea of iq being a factor, it's probably a testament to how poor of a worker I am that I'd ask a question like that

But sure what do you guys have to say, how did you or do you become a hard worker?
4 posts and 2 images submitted.
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>>9130279
>>
>>9130279
Depends on how "stupid" you are. Sure IQ determines how fast you learn and how high your limit is.
But I am certain that once a certain level of intelligence is reached you can learn pretty much anything, al be it slower than smart people.

However these is a difference between learning and producing. It's very unlikely that you'll become part of the best of the world in your speciality unless you have a high IQ.

>how do you become a hard worker?
Sadly, just like IQ this is also part of the genetic lottery.

Think of yourself not just as an actor that acts upon the world, but as something that takes input and acts based on that.
You have to find out which stimuly (or lack thereof) makes you work hard.
For me it's going to the library, it's the only place I can study without procrastinating.
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>>9130279
>how do you become a hard worker?
you are born one
it's genetic lmao :^)

but seriously, pretty much anything is partly genes

What book would you recommend for me to work through after covering pic related?

I just finished my mechanical engineering degree, didn't choose any of the optional mathematics modules but now want to learn some more in my free time
4 posts and 1 images submitted.
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There is "Advanced Engineering Mathematics" by the same author which is also pretty good.

I also recommend you go through Numerical Methods for Engineers by Chapra and Canale.
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>>9130274
I really love this book.
You can try the advanced eng. math. by Stroud next.
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>>9130288
>>9130289
thankyou, i will have a look at these

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Can multiple causes map to the same effect like how multiple inputs can map to the same output for a function?
5 posts and 1 images submitted.
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>>9130182
Is that Shrek? I like Shrek.
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>>9130182
Well yeh of course. But don't ask a physicist this or else prepare for sperg-out
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>>9130182
Definitely. Multiple causes, like posting gifs, posting green aliens and being OP - they all map to being a faggot

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well?
29 posts and 2 images submitted.
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>>9130156
Odd is given by:
N + N+2 + N+4...N+Infinity
Even is given by:
N+1 + N+3 + N+5...N+Infinity
furthermore if you go into negative numbers then they also cancel out the 1 difference at any point,
Thus unless it specifices at a specific Nth term, they are equal
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>>9130159
>if you go into negative
>unless it specifices at a specific Nth term
fucking retard can't even read
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>>9130165
T. Spastic
That guy clearly answered the terms of the question retard
Fuck off to whence you came

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How to pronounce sqrt(i):

>you
Square root i
>me, an intellectual
Squirty
17 posts and 10 images submitted.
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>>9130105
skrrt-eye
>>
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Radical eye.
>>
squirt eye
sqrt is pronounced squirt

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The great debate:
Write your thesis in serif or non-serif font? Obviously in LaTeX.
33 posts and 7 images submitted.
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Serif, of course.
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>>9130027
I really like for the main text to be in serif, but I feel like sans looks clearer when labeling stuff on figures. Should I make the figure descriptions sans as well for the figures and the description to be more consistent, or serif for consistency with the main text?
>>
>>9130034
I also have the figures in sans-serif. All the text part is in serif font though. I think it looks kinda off if your main text is in serif font but the figure description is in non-serif.
In the end it all comes down to your preference. Just try out different options, print them out and look what's best for you.

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>pre-exam diarrhoea

every time
5 posts and 1 images submitted.
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>>9130019
>pre-exam spontaneous combustion
God I hate that shit
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>pre-exam suicide
How do I prevent that shit from happening
>>
>>9130153
Good news is, it only happens once.

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I know this is more of a math board but I have a biology question.
What food gets digested 100%?

Basically I don't want to poop anymore and am looking to alter my diet to foods that will 100% absorb.
22 posts and 3 images submitted.
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>>9129930
Sugar
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>>9129930
Sugar is one.

You will however need a balanced diet and unless you eat enough roughage you will one day excrete a total brick, complete with sharp corners.

is pic. related what you have in mind? Your pic does hint about a few things.
>>
>>9129930
Pure macro nutrients, carbohydrates, fats and proteins.

what does /sci/ actually think of this thing?

i see it passed around but does it cover precalc and trig well enough to confidently get into 1st year stuff without wishing you brushed up on it?
4 posts and 1 images submitted.
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Honestly no. It goes into stuff that you absolutely have no use for in first year calc. Just do ch. 1, the logarithm chapter and the trig chapters in stewart's precalc and you should be fine.
>>
Not a fan of it. Especially for people who haven't done math in a while or had a shit highschool.

Just get a normal Precalc book.
Personally I can't stand the layout of modern textbooks like Stewart's so I prefer
http://www.stitz-zeager.com/szprecalculus07042013.pdf
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>>9129858
It's pretty great.
You can skip the section on isometries/congruences and the such, it doesn't really matter much.

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How the fuck do I solve this, /sci/?

Assume you're given a rectangular sheet of paper with corners labelled as pictured. Your task is to fold B onto B' such that [math]\overline{AE}[/math] has minimal length.
Once you've done that, assuming you were told the ratio of [math]\overline{AB}:\overline{BC}[/math], what is the ratio of [math]\overline{BE}:\overline{EC}[/math]?

Keep in mind this is a question primarily about folding paper. So [math]\overline{BE} =\overline{B'E}[/math]. That's what the circle illustrates. Furthermore, the red triangle and the blue triangle are congruent right triangles.

I am a turbobrainlet. Prove you're at least smarter than me.
4 posts and 1 images submitted.
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>>9129741
It's quite trivial. But why would I be helping a redditor?
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>>9129741
Without loss of generality let
[math] A = (0,a) [/math]
[math] B = (0,0) [/math]
[math] E = (1,0) [/math]
then
[math] B' = \left( \frac{2 a^2}{a^2 - 1}, \frac{2 a}{a^2 - 1} \right) [/math]
[math] C = \left( \frac{2 a^2}{a^2 - 1} , 0 \right)[/math]
[math] D = \left( 0 , \frac{2 a}{a^2 - 1} \right) [/math]
So the ratio is just
[math] \frac{1}{\frac{2 a^2}{a^2 - 1} - 1} = \frac{a^2 - 1}{a^2 + 1} [/math]
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>>9129992
Did you know about \\ in latex?

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Can any mathematician give me an algorithm that scales up to any number of dimensions how to do an axis-angle rotation?
5 posts and 1 images submitted.
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>>9129624
Something that can be programmed on computer
>>
Here's what I have going so far. If anybody can help I would appreciate or is this enough to solve for all the unknown already. I just haven't completely tried it out yet.

There are several restrictions we can use in a system of equations to arrive at the rotation. First, the distance of the moved point or any point of rotation has a distance from the origin of rotation the same as the starting point. The distance to the end point of the axis of rotation vector is also maintained, as are any number of points between the end point and the origin of rotation, which if I'm not mistaken give an endless number of additional restrictions, but one more is essential. The total distance between two points in a rotation approaches radians * radius / 2 pi, and so we can break that down to an infinitesimal and add those up because of circumference equation.

Another method I was thinking of involved using slices with an upgraded polytope in a higher dimension to make up the hypersurface where a rotation could be done using spherical coordinates along each expansion of dimensions following a single path of polytope neighbours.
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>>9129624
>axis

You mean plane-angle rotation. For plane in the i-th and j-th dimension, it's just the identity matrix were eii and ejj are removed and replaced by cos(angle)*eii + cos(angle)*ejj -
sin(angle)*eij + sin(angle)*eji

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http://vertpaleo.org/Annual-Meeting/Annual-Meeting-home.aspx

Did anyone attend? If so, what talks did you guys like?

A general discussion about the conference and/or vertebrate paleontology


I though this meeting was nice in that its non United States location kept out the amateur paleontologists which is nice, less armchair scientists the better


Copy of abstract book
http://vertpaleo.org/Annual-Meeting/SVP-2017-program-book-v6-Print-Ready-with-front-co.aspx
4 posts and 4 images submitted.
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>ctrl+f
>"bakker"
>1 result
>last author on a presentation about Dimetrodon
they missed out desu senpai
>>
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you are like a little baby
watch this:
>https://gsa.confex.com/gsa/2016AM/webprogram/Paper282844.html
I shit you not, the conclusion of that was a picture of saxophones superimposed over rearing sauropods, and Bakker excitedly proclaiming "they were COLTRANE-OSAURI"
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>>9129613

Fuck you, OP, and your elitist attitude! Your too much of a jerk to talk to amateurs, and they recognize that you are too much of an asshole to talk to, but that doesn't mean that they don't have a place in the society.

By the way, it's fewer rather than less!

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