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Archived threads in /sci/ - Science & Math - 200. page
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What is the possibility of someone with Autism/Asperger syndrome having a high IQ or just being highly intelligent (implying that they haven't taken an IQ test yet)?
31 replies and 2 images submitted. Click here to view.
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It's actually just a stereotype that people with autism or aspergers are intelligent. Most of them are below average intelligence but when they actually are intelligent they are VERY intelligent.
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>>8016235
Having a brain that makes it exceptionally easy to identify types of rocks won't help you very much if you want to interact with society in a nonparasitic fashion.
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>>8016671
Can confirm, I have aspergers and I'm a fucking dumbass.

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tau or pi? and why?
also math discussion general thread I guess
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Pi. Tau refers to Pi.
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>>8016220
π
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>>8016221
so we use a half pi now because it's referring to pi?
>>8016223
but tau is much more easy to understand for children and 2pi is very often used in physics

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How come this is more fundamental than Newton's laws of motion? Some textbooks goes as far as claim that particles "smell" their way beforehand and you need quantum physics to explain it.

But when I solve problems, I usually get (with a constraint [math]g(x,y,z)=0[/math]):

[math]- \nabla U -m \ddot \bar{r}+\lamda (t) \nabla g=\bar{0}[/math]

But [math]\nabla g[/math] is just a normal vector to the path the particle takes, so [math] \lamda (t) \nabla g[/math] is a force that is normal to the path, which makes sense as you need some force to...
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[math]- \nabla U -m \frac{d^2}{dt^2} \bar{r}+\lambda (t) \nabla g=\bar{0}[/math]
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>>8016099
Because it holds in so much more general situations.

i.e. Works for this [math] S = \int {\operatorname{dt} \left[ {\frac{1}{2}m{{\dot x}^2} - V\left( x \right)} \right]} [/math]

And also works for this, [math]S = - {T_{Dp}}\int {{d^{p + 1}}\sigma } {e^{ - {\Phi _0}}}\sqrt { - \det \left( {{g_{\alpha \beta }} + {B_{\alpha \beta }} + k{F_{\alpha \beta }} + k{b_{\alpha \beta }}} \right)} + {\mu _p}\int {{{\left( {C \wedge {e^{B + kF}}} \right)}_{p + 1}}} [/math]
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>>8016491
Even if it works, can it still be fundamental?

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is there a mathematical explanation for this?
13 replies and 2 images submitted. Click here to view.
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explain the prob of 12 times zero in series part?
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1/81 = (1/9)^2
= (0.111...)^2
= something about infinite sums
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>>8016013
thats just a trashy calculation for assumption of random distribution of numbers in a run. 10^(-12) * 100%

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why is graph theory such a raging meme?
11 replies and 1 images submitted. Click here to view.
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What does this even mean? Are you asking why graph theory is becoming increasingly popular in the past 50 years?
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>>8017136
No, OP is asking why it's such a raging meme.

Try reading next time buddy.
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Because you are still not developed enough to understand its applications.

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I got part A and B, but I don't understand part C. I have the solution but I don't understand it.
16 replies and 1 images submitted. Click here to view.
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For (c), suppose that e_1 is in W. Then, there would exist N such that

[math] e_1=\sum_{k=1}^N c_k\sigma_k [/math]

But you showed in (b) that the e_n(k) were an orthonormal basis, so you start taking <·|e_N> on the relation and going down you will discover that all the c_k are 0. This is a contradicition so [math] e_1 \notin W [/math]

For (b), notice that e_n is NOT in W for each n, because <e_n|\sigma_n>≠0. Therefore, W perp is 0. Then you are done
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>>8015899
What class is this? Senior level linear algebra?
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>>8017428
fuck off, this is a great exercise for a first course in proof based linear algebra, so for mathematics sophomores

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My current life-plan is to go into computer science and neuroscience once I graduate from physics: I'll either somehow do a master's in both or jump straight into a PhD. But to do this I'll need to learn a lot..
I have a vague notion of where to start for CS
>Logic Manual
>Intro to Boolean Algebra & applications
>Code
>GEB
>Computability
>The Principles of Mathematics
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24 replies and 2 images submitted. Click here to view.
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>>8015877
that seems like a bloody awful collection of books
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>>8015885
Why?
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>>8015877

>Principia

This has to be bait.. Otherwise, this post reeks of autistic high schooler.

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Howdy, /sci/, what's your favorite insect defense mechanism or just oddball insect behavior? I'll start:

https://m.youtube.com/watch?v=_U-1kPbvj8Q

The motherfucking bombardier beetle, literally roasts its enemies alive. It ejects a mixture of two chemicals from its abdomen which, on contact, vaporize and rapidly heat up while traveling towards its targets, literally cooking them alive.
13 replies and 3 images submitted. Click here to view.
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>>8015850
>that unnecessary comma
I should just kill myself. Anyways, time to go get another bug.
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>nat geo
https://m.youtube.com/watch?v=K6m40W1s0Wc

Asian bees are pretty neat. I know i'm terrified of those giant fucking hornets, but their ability to swarm and cook them alive is fascinating.
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>>8015850
>literally burning diarrhea

Why are insects so cool?

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Anyone here can explain to me the problem of observation of quantum particles and how the simple observation can change reality?

I think that people is misunderstanding the whole point and adhering to it every kind of mystic beliefs. I love science but the quantum physics world is beyond my studies, so I'm reading on it but I can't figure the experiment point on my own.
23 replies and 3 images submitted. Click here to view.
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>>8015831
>Anyone here can explain to me the problem of observation of quantum particles and how the simple observation can change reality?
It doesn't.
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>>8015831
remember those cards we had as kids were seeing it from one corner would wield a different image than looking at it from another corner? which image was the true one?
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>>8015836
so the quantums have multiple "faces"?
Why all the importance of the discovery then? They make it sound like is much more than that

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Say, what should one pick his engineering major based on? I'm doing an introductory year where we study courses representing multiple engineering disciplines, and it's safe to say my favorites have all been related or somewhat related to MechE, Statics, Dynamics, Descriptive Geometry and multiple topics of Physics.

But before doing this year I've thought I would study Electrical, based off my interest in it's real world applications. I would've liked to learn programming and I'm a huge fan of technology.

Tl;dr: should one choose his...
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>>8015817
Why is there no FPSfag ? You missed out the most popular one...
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>>8015964
Covered by fratboy
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I'm an electrical, but pick the one that interests you. I know lots of younger engineers who are ME and wish they did EE, CE.... And vice versa. You can always change horses if you feel your interest waning.

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Cool datastructures?

I like quadtrees.
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I like hexatrees.
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>>8015797
I am not entirely confident, but I think it's a pair of giraffes walking on the edge of a table.
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I've always thought tries were very clever.

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Do you need a licence to operate a home lab?

I mean, say you synthesise a common drug. Can you legally sell it?
If not, what steps need to be taken to legitimise the lab?
Is there some kind of mandated purity test, or a requirement of a doctorate to work at such a task?
11 replies and 1 images submitted. Click here to view.
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>>8015716
this is way to vague

if you dont have any restricted chemicals, and dont synthesize any restricted chemicals, then you can do whatever you want

if you do have something thats restricted, you will need some form of paperwork to have it / make it.

If its a food or drug, it needs to be approved by your countries department that deals with that sort of thing if you want to sell it, if it is on their list.
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>>8015716
If it's a meth lab, then no.
>>
Only if you live in the United States of Freedom.

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So there does exist transgender scientists. Interesting how this guy happens to be female-to-male. Can females and male-to-females just not into science? I have never heard of any successful ones.

I just cannot ever understand how a trans person can become a biology major when they reject their own biology by claiming to be something they are not.

Then again, why are most scientists big time liberals? My biological anthropology instructor even said that 'gender' belongs to social anthropology while for biological anthropology you study 'sex'....
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>>8015425
FtM always seems to come out so much better than the reverse
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>>8015428
They really don't. You only think so because you have a biased view of how a woman should look. This could be caused by a variety of factors such as 4chan and/or residing in your parent's basement cut off from the opposite gender.

As a Doctor, I can confirm this.
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>>8015428
It's like what they say... men age like a fine wine while women age horribly.

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>be in bio engineering lab
>work with dimethyl mercury for creating more organomercury compounds
>wear 3 layers of silver shield gloves
>3 layers of lab coats
>full face respirator
>3 layers of easily removable pants
>2cm thick butyl rubber shoes
>knock over stand
>stand falls on vial of dimethyl...
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>>8015377
why were you not working in a glovebox?
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>>8015393
$$$$$$$$$$
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>>8015377
HAHAHAHAHAHAHAHAHAHAH FAGGOT

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Can someone explain the big bang to me?
I've read the wiki article but I'm a bit confused.

So the universe exploded out from a single point? But then the wiki article states that
>In the most common models the universe was filled homogeneously and isotropically with a very high energy density and huge temperatures and pressures and was very rapidly expanding and cooling.

so it was homogeneous as the big bang happened? then expanded and cooled as it exploded?

I also seem to remember reading somewhere that the...
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29 replies and 2 images submitted. Click here to view.
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for ~300,000 years, things fizzled into existence throughout all possible, physical space.

Now, things have condensed. It will only get worse as things won't stop accelerating.

We are some of the first kids in space.
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>>8015373
You have a point. Using your picture it is point 0. In this point is a lot of energy and matter. All of this energy and matter can't fit in such a tiny point so it explores out. It then follows the rest of your spectrum on the picture. Try to think of it like if you forced a lot of stuff into a suitcase that couldn't hold all that stuff.
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>>8015384
So the universe is expanding from a singular point though?

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