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Archived threads in /sci/ - Science & Math - 20. page
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How do you become as smart as possible?
I'm doing computer science and my brain is rotting
I've been doing the following:
>self studying maths outside the scope of my course (including logic and theory of computation, of which we do the bare minimum)
>replacing mindless internet browsing with slightly less brain-damaging stuff (5+ hours of /v/, /pol/, /r9k/ etc replaced with one hour of /sci/, social media replaced with Aeon/Nautilus)
>3+ hours of reading a day, fiction...
>>
>>8522275
How about you get a job you waste of a perfectly functional brain.
>>
>>8522275
>I've always ate well
I doubt it.
Do you eat enough food that stimulates hormesis?
>How do you become as smart as possible?
I don't think you can. You can become more knowledgable or learn new skills, sure.
>>
>>8522275
smarter people use their brains less actually, the key is not to waste your energy on autistic mental functions but to give yourself proper rest and figure out how to be more efficient when the time comes to solve some real problems

basically now that you've replaced your shit habits with more intellectually engaging habits, now you have to replace your intellectually engaging habits with intellectually preservative habits

this includes contemplation, creative thought, and productive output

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I'm 180 cm per 80 Kg.
I've always been around 70 Kg but now somehow I've put muscle mass.
I need to lose 10 Kg because I don't have stamina to carry on this extra weight.
I play as a winger (association football) and I'm always out of breath now.
Things I thought of:

Sleep deprivation.
Calorie restriction.
Extra physical activity.
...

What do?
>>
>>8522021
Here, we don't even know how to $gain$ muscle mass.
>>
>>8522021
easy, just do more aerobic exercise; alot of running naturally you will lose muscle mass the longer distances you run and if you do fast interval training (very fast but not fast or short distance enough for a sprint e.g. 200 - 1000m in multiple reps at pace.) but also do long runs; work your way up to like 7 mile runs
>>
>>8522040
>work your way up to like 7 mile runs
This suggestion could be spot on.
I rarely go past 3 miles and I focus on some light jog and 50, 100 m sprints.
I'll schedule 7 miles twice a week as soon as my calf pain goes away.
I've put my body under too much stress with all this fucking weight.
Not used to.

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>going over something with derivatives in class
>"when you derive that function, shouldn't...."
>derive

I fucking hate engineers so much.
>>
the only thing i want derived are my categories
>>
what's the difference from deriving and differentiating? better yet why call it a derivative and not a differential?
>>
>>8521434
A differential is the little "d" in the $\frac{ dy}{dx}$

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explain to me like im 5 whats the big deal about fractals? some smart people speak of them in almost mystical terms?
>>
>>8521233
this is an 18+ website
come back in 13 years and I'll tell you
>>
>>8521233
Tapestries sell for 50bucks and some even 1000. Fractal tapestries sell for more. Those are the big deals about fractals.
>>
>>8521233
dude acid lmao

Well /sci/?
>>
Yes, kinda.

If the engines are running the plane still needs to gain enough momentum to take off. This can be achieved by lengthening to conveyor belt enough so the plane has room to gain speed and begin to lift. With such a system, since the plane has wheels, you don't need a conveyerbelt at all and instead can just have a traditional runway.

The plane lifts because of air moving by the wings really fast, not because of the wheels spinning really fast
>>
>>8521044
As stated, assuming frictionless wheels, vacuum, spherical cows etc, etc, then the following happens:

The wheels and the treadmill instantaneously accelerate to light speed. The plane attempts to accelerate forward, but cannot move because its wheels now have infinite speed and thus infinite mass.
>>
>>8521044

No, bernoulli's principal dictates that it cannot.

Any other answers are meme/troll bullshit.

Any and all aircraft require the pressure generated from the shape/speed of the wing to create upward lift. By mirroring the speed of the aircraft in the exact opposite way, the relative speed of the plane is 0mph. Thus, no lift can be created.

Unless there is some sort of outside force like a hurricane headwind, that plane isn't doing shit besides running in place.

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What does ∞ - ∞ equal?
>>
in the context of limits, it could mean everything
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>>8520769
THAT"S AN INDETERMINATE FORM, DON"T THINK TOO HARD ABOUT IT, GOY!!!!!!!!!!!!!!!
>>
>>8520769
>falling for the infinity meme

Good goy

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Sup /sci/ is it possible to learn all of galois theory in 1 minute? I got a final literally in 5 minutes and I never paid attention in class, just shitposted Galois memes. Please help.
>>
>>8520768
Okay fuck off, real analysis isn't that hard. Stop trying to convince me I can't do it
>>
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>>8520768
tfw you'll never be a 20-year-old frenchman developing new maths that established mathematicians couldn't even understand for several decades. :(
>>
>look up galois theory on youtube
holy shit i've been saying it wrong this whole time. i thought it was gah-low-is

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Would the world be better off if ruled by mathematicians rather than the current political elite?
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no

case in point:
https://terrytao.wordpress.com/2016/06/04/it-ought-to-be-common-knowledge-that-donald-trump-is-not-fit-for-the-presidency-of-the-united-states-of-america/
>>
>>8520163
There's a certain skill to being a politician that isn't necessarily held by mathematicians

Also, running a government isn't similar to a math equation ( or a business for that matter )
>>
>>8520168
Why can't you turds just stop? He's won, that's it, stop bitching, you AREN'T going to change it. Besides, changing it WOULD cause a civil war. It happened, it goes to continue to happen, get the fuck over it.

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how would I go about solving this matrix equation with a non-square matrix?

I can't find the inverse obviously so I can't just do X = A^-1 B
>>
>>8519805
Write matrix X with some arbitrary coefficients, then multiply the matrices on the left side and solve the system of equations
>>
First X must be a 2x3 matrix

3a+2d = 3
4a + 3d = 1
1a +0d = 7 => a= 7
...

keep solving from there.
>>
>>8519805
you might try

A x = B
A^t A x = A^t B
x = (A^t A)^(-1) A^t B
If there is an x that works, this will give it to you. You have to check that it works though.

What does /sci/ know about rubber? Chemically speaking.
>>
bouncy
stretchy
waterproof
good insulator of electricity and heat
>>
>>8519637
There are tons of different rubbers from natural to synthetic to EPDM and sulphonated and fluoronated

Rubber is usually measure in thing s like tack, adhesion, hysteresis, g' and g". Rpa and mdr
>>
>>8519674
Even silicon based rubbers are useful, they lack strength but are resistant to heat aging

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Hello friends. I am writing a little paper on applied probability, and so far I've studied the rigorous construction of the Brownian motion and the proof of its properties, the construction of the stochastic integral, and an explanation of adapted processes.

I think I've build up a decent toolbox now to apply it to "real world problems", and I was wondering if there is something small I could research in this field.

One of my ideas was to look at the Black-Scholes model in relation to recent events (Brexit, Trump election) and whether it works...
>>
I'd think extreme events (Brexit, Trump election) are the influences most far away from the peaceful world of textbook entry level stochastic processes.

I think I recently saw a site with real world example data for statisticans to work with. Google?
>>
>>8519431
>I think I recently saw a site with real world example data for statisticans to work with. Google?

I'm not following this one. I can get all the data I need from yahoo finance.
>>
>>8519431
Trump wasn't an extreme event. Very low prob of 3 term democrat.

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Say you have the equation x^2 + 6x + 9 = 0. Couldn't (x + 1) and ((x^2 + 6x + 9)/(x + 1)) technically be considered factors, so why doesn't it work to set each factor to zero and solve from there?
>>
>>8523190
What is this even supposed to accomplish?

You still have the exact same quadratic to solve (in the numerator) you just tacked on some useless terms that cancel to 1 for no reason
>>
You would create a discontinuity at x = -1, so it wouldn't be the same function.
>>
>>8523190
x^2 + 6x + 9 = (x+1)((x^2 + 6x + 9)/(x + 1)), for all x != -1.

Thus if 0 = x^2 + 6x + 9 shares solutions with
0 = (x+1)((x^2 + 6x + 9)/(x + 1)) when x != -1.

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Science proves jailbait is the best.
>>
define 'reproductive value'
>>
>>8523191
value=i like it
>>
>>8523191

Reproductive value (RV) is basically a measure of the amount of offspring a female of a given age can be expected to have over the remainder of her life. By mathematical definition this rises with age up to the beginning of a female's reproductive lifespan, as the probability of her dying before she starts reproducing decreases, and then goes into decline as she uses up her fertile years.

The values in the graph were taken from Amazonian populations which make fairly good models of prehistoric people....

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how hard is to study two degrees at the same time?
>>
very
>>
>>8523100
why
>>
depends entirely on the degrees
if you go into uni like I did already having a firm grasp on your major, then you don't really gave to go to any classes besides the general education ones that you need for every degree

and in that case, you could do a second degree simultaneously and focus all of your attention on it

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REV UP THOSE ROCKET BOOSTERS

>http://www.ulalaunch.com/webcast.aspx

IT'S LAUNCH DAY MOTHERFUCKERS
>>
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Why do I love ULA so much? It's pretty simple when I think about it. ULA isn't just the best launch provider in the country; they might just be the greatest launch provider of all time. Just imaging the Altas V riding through the skies of Earth, the wind on its fairing, the mighty RD-180 below it. As she rides through the red sky, NASA swoons at her very scent. They know how she smells; the essence of burning RP-1 smell is sold in Orlando under the name of "Space Orgasm." The very nature of ULA is mystery. Could they be playing a deeper game than even Tory...
>>
>>8522968
>that image
why? Irony?
>>
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>>8522982
Better than a toothbrush

>pic related, a ULA launch vehicle

How do you solve this
>>
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>>8522758
>>>/wsr/
>>
>>8522758
is m(AE) the length of the line segment AE?
if so, its 10

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Did the (pre-classical) ancients REALLY believe that the earth was sitting on the back of a giant turtle, or was it some sort of mystical allegory or something?
>>
>>8522677
https://en.wikipedia.org/wiki/World_Turtle
>>
>>8522677
Sounds like a /his/ question desu.
>>
They literally didn't think about it beyond the turtle

so yes, they really did believe it. Anyone who didn't believe it either kept their questioning to themselves, or was no longer part of that society.

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Hey /sci/.
What are the physical properties that determine whether or not a photon will be reflected, absorbed or ignored when directed at an object of mass?

Also, there are mirrors for photons from the visible part of spectrum. Can there be mirrors for gamma rays, or thermal waves?
>>
>inb4 this guy
>>
>>8522388
Is this a typical homework question, since there are no answers?

This was never mentioned in my courses.
>>
>>8522388
why can't you just google it?
yes, it's a standard homework problem, it's just that nobody cares about you
there is a stupid question thread, people will answer it in there

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Clearly, proof by induction is the most advanced way of proving things in math.
>>
>>8522289
kys cs major
>>
>>8522293
Meanwhile, in CS we are writing AI to replace pure math. Enjoy your non-existent careers.
>>
>>8522400
The AI that replaces pure mathematicians will not be written by CS majors. It will be written by AI that researches AI and has replaced those CS majors.

Hey /sci/ before you start shitting on me, just hear me out. So in general, I know I am intelligent but over the past 2 years or so I have noticed that my perception is enhanced in a way. Not that I have an enhanced eyesight or hearing but rather I just notice things without really thinking about it. These things usually stick with me and I can almost immediately predict certain things about people which later turn out to be true. Has anyone else noticed this? Asking this board because this is definitely the highest concentration of intelligence on this site.
>>
>>8521059
nope, you're not intelligent
everyone else notices the things you do, just never say anything about it because it's normal

also, not science or math related, so fuck off
>>
>>8521059
That's a sign of autism. Lay off the drinking water, vaccines, air, and food.
>>
>>8521059
There you go friend they can help you more than we can.
>>>/x/

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Do you guys ever feel like its weird that we are animals living out our natural life cycle?
>>
science =/= philosophy
>>
>>8520686
In the same sense it's weird that a fire burns out, sure dummy
>>
>>8520686
>do you guys ever find it weird that 1 assaulted by 3 becomes 4?

No, I don't

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Which philosophers does /sci/ approve of?
>>
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>>8520679
Various themes in the aesthetics of nature, such as appreciation grounded in the idea of the picturesque, have been criticized in a number of ways: as anthropocentric (Godlovitch 1994), scenery-obsessed (Saito 1998a), trivial (Callicott 1994), subjective (Thompson 1995), and/or morally vacuous (Andrews 1998)

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what was your reaction when you realized that literally half the population has an IQ lower than 100?
>>
>>8520517

did chomsky actually say pic related?
>>
>>8520524

why? does it sound so absurd?
>>
>>8520524
How new are you?

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Any idea?
>>
some /x/ shit that you should take back over there
>>
>>8520182
looks like guitar tablature
>>
>>8520182
>>8520206
Yeah Notes of some kind.

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Teach me something new. Anything.
>>
$e^{i\pi} + 1 = 0$
>>
[eqn]A = PDP^{-1}[/eqn]
>>
(tan x)' = sec^2 x

How to learn Hacking? Where to start?
In my opinion hacking have to be the highest grade of understanding soft- and hardware
>>
>>8522835
>>>/g/
>>
>>8522835
buy a hoodie, and start typing shit into the command line. don't forget to yell "We're in!" periodically
>>
>>8522835
>How to hacking
keked my ass off

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if a person were to be in a very cold environment for a long time, poorly prepared for the temperature, would adderall make it less or more likely for hypothermia or freezing to death? would it be painful overall or in extremities like hands/feet? is there a drug that can be taken to make it less painful to be in the cold? i already know about alcohol, but being drunk isn't an option
>>
There is no drug that makes your cells work faster, so no.
>>
>>8522560
it only takes a small ammount of alcohol/=.
>>
>>8522590
It'd make him feel warmer but accelerate the onset of hypothermia.

dear /sci/ when was the first time math was used to describe natural phenomena? What was the first instance of a physics equation as we know them today?
>>
>>8522489
>when was the first time math was used to describe natural phenomena
Probably around the same time numbers were invented you silly.
>>
>>8522521
where numbers really invented? That is a whole other issue. The first instance I know of mathematics being used to describe nature is the pythagoreans using ratios to describe harmony but what about something resembling a modern formula?
>>
>>8522489
Math was probably first used to describe geometrical relations or trigonometry stuff rather than natural phenomena.

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Hey /sci/, can you solve this for me? For some reason this is the only problem I can't seem to solve.
>>
>>8522431
multiply 1.3 by 100 first, then add and subtract the top, then divide
>>
>If you want help with your homework, go to /wsr/ - Worksafe Requests.
>>
Tree fiddy

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https://www.scientificamerican.com/article/how-our-brains-turn-women-into-objects/

how long until feminism breaks apart because science shows sexual stereotypes and gender roles and double standart are biological?
>>
>>8522045
How long before crappy /pol/r9k/-bait stops being posted on /sci/?
>>
>>8522052
when scientific american stops publishing it?
>>
Just because they are biological, doesn't make them right, nor logical nor necessarily healthy.

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