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Archived threads in /sci/ - Science & Math - 1130. page

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Ever talked to someone who obviously had no idea about science? Examples being 'that kid':

>That kid who preached that birds are dinosaurs to anyone that would listen, even the biology teacher
>That kid who said all elements are formed in the earth's core
>That biology teacher who didn't know what Cro-Magnon man was
>That maths teacher who didn't know Fermat's last theorem

Fucking plebs
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>>8517784
>>That kid who preached that birds are dinosaurs to anyone that would listen, even the biology teacher
They are tho
>>That biology teacher who didn't know what Cro-Magnon man was
Cro-Magnon hasn't been a thing for ages. It's homo sapiens sapiens.
>>That maths teacher who didn't know Fermat's last theorem
It's literally a meme tho. Any time you invoke the theorem it's always hilariously contrived and doesn't even give you the case where the exponent is 2.
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>>8518361
I know a non contrived use of Fermat's last theorem.
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>>8518361
Yeah but elliptic curves are useful.

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I want to get better at doing integrals, not because it actually helps me with my study but because I'm jealous of some people on stackexchange. I've taken all the calc courses at my uni and have a somewhat advanced analysis undergrad analysis background
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Start practicing and learning other methods
You'll also want to learn about special functions but this is largely situational which is why you should start practicing
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dont forget C bro LOL AMIRITE
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>>8517791
Do you know any particularly good resources for this? Maybe a collection of interesting integrals with their solutions? I know analytic number theorists are usually really good at taking wonky integrals, would it be worth it to dig into the subject a little? Or is go through a shitload of excersizes in higher-level calc books really the best way to go about it?

Can we clone Homo Erectus?

What would they be like?

Neanderthals had comparably human intelligence, how dumb would Homo Erectus be?
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Think Africans
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HUGE dick
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>>8517683
When I graduate I'm going to artificially breed one so I can fight it.

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How
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>>8517674
I know it's bait, but I'll bite. There are algebraic ways to explain it, but what about this way?

3! Is how many different ways you can permute 3 things. 6 ways.
2! Is how many ways you can permute 2 things, and so forth.
Now, how many ways can you permute 0 things?
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>>8517685
0?
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>>8517674
n! = (n+1)!/(n+1) for all n.

So :

0! = (0+1)!/(0+1) = 1!/1 = 1

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Is this a legal operation? In the line where the pencil tip is: can you "cancel out" the dt operator within the integral and follow through like shown?
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Pls halp
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>>8517588
Are you majoring in physics? Then yes. Are you majoring in maths then no
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>>8517613
This is differential eqns for my math econ class. We do alot of things related to physics like gradients and hessian matrices.

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Pls help am curious
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What's the actual question?
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>>8517585
Come on now..
Look at the picture duh
How is this possible
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>>8517594
6 cells is superior to 2-5 cells

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Listening to the music is for mentally retarded people.
>Prove me wrong: Protip you can't.
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Didn't Einstein play the violin?
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Schrödinger was a musician
op is a faggot. what a surprise
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>>8517507

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What do you think of her /sci/?
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>>8517482

id make her squirt if she wants me to
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>her
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>>8517482
awesome link, OP.

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Is squirting a loss of bladder control? Asking for a friend.
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>>8517459
weird...my friend was wondering this as well
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Someone please explain. My friend is gonna as me about this one day probably.
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Skene's glands are implicated in it.

It could be. It might not be.

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Nazi engineering thread

Here's the big bad boy Schwerer Gustav
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enigma, the most advanced crypting machine ever created
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>>8517457
Why did they build that? It has to be one of the most impractical weapons that has ever been built.
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>>8517493
They fell for the Nazi superscience meme

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How the hell are you going to connect a cybernetic limb your bodies? At some point it has to connect to the blood, blone and muscle of your real body. It has to interact with your body and understand signals from your nervous system. How do you ensure that you don't get infections? How do you ensure that the forces isn't located at a single point (where it connects?). It just seems like a total engineering cluster fuck. Using real biological limbs seems to make much more sense.
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>>8517420
Why would it connect to your blood/bone/muscle?

Also have you seen this?
https://www.youtube.com/watch?v=CDsNZJTWw0w
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>>8517420
> How the hell are you going to connect a cybernetic limb your bodies?
Well how do they connect prosthetics to people? there are many ways, ranging from belts to screws. Maybe google some pictures and see for yourself.

>At some point it has to connect to the blood, blone and muscle of your real body.
i don't think it has to connect to the arteries and veins, correct me if i'm wrong. Connecting it to the bone is maybe the easiest part and connecting microscopicly small electrodes to the muscles has also been done before.

>It has to interact with your body and understand signals from your nervous system.
researchers have already done all of that, afaik

>How do you ensure that you don't get infections?
"Blunn’s team has focused its efforts on encouraging the skin to form a tight seal around the implant, thereby decreasing the risk of infection."
-from an MIT technology review
www.technologyreview.com/s/421607/implanting-artificial-limbs-in-the-body

>How do you ensure that the forces isn't located at a single point (where it connects?). It just seems like a total engineering cluster fuck. Using real biological limbs seems to make much more sense.

>It makes more sense connecting this dead limb to a person than that dead limp.
not sure about that

I'm not even studying in this field, have not even touched it. I just couldn't leave you here without answers.
Your babbling sounds quite unintelligible. I'd suggest reading up on this topic, you will find many articles online, before spouting nonsensical opinion based arguments.
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>>8517420
whats the point of cybernetic limbs when once they are fully realized scientist will just figure out how to regrow human limbs via stem cells?

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Is the discussion of the nature of consciousness really a meme?

Is it just that everyone is bummed out that such a trivial definition cannot be formally made? I don't think I've ever talked to a physicist who DIDN'T get mad when you tried telling them that there exists no definition of consciousness that can work with the rest of the laws of physics.

And then come all the famous quantum experiments of the twentieth century with all these funny results that force you to question human consciousness, and still when you ask a physicist what role consciousness plays in physics they get even angrier than before.

What exactly is the issue here? Why anger?
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Or because someone is going to say "I don't know what you're talking about" I'll just respond beforehand.

Physicists insist that consciousness plays a minor role in understanding the universe, but intuitively most decently intelligent people know that cannot be the case.
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>>8517342
Because you're a fucking brainlet that doesn't know shit about quantum mechanics.
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>>8517371
If I had to guess, you probably know next to nothing. Angsty fag.

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Is Bill Nye really that much of a douche douchenozzle and a mean bully IRL?

https://www.reddit.com/r/AskReddit/comments/5gj79o/comment/dasrw5v?st=IWC8MWF7&sh=5ff1efb3
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>>8517299
Yes. Total asshole. I grew up in Seattle and it's the most inhospitable place in North America, you can thank people like Bill Nye.
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I saw Bill Nye at a grocery store in Los Angeles yesterday. I told him how cool it was to meet him in person, but I didn’t want to be a douche and bother him and ask him for photos or anything.
He said, “Oh, like you’re doing now?”
I was taken aback, and all I could say was “Huh?” but he kept cutting me off and going “huh? huh? huh?” and closing his hand shut in front of my face. I walked away and continued with my shopping, and I heard him chuckle as I walked off. When I came to pay for my stuff up front I saw him trying to walk out the doors with like fifteen Milky Ways in his hands without paying.
The girl at the counter was very nice about it and professional, and was like “Sir, you need to pay for those first.” At first he kept pretending to be tired and not hear her, but eventually turned back around and brought them to the counter.
When she took one of the bars and started scanning it multiple times, he stopped her and told her to scan them each individually “to prevent any electrical infetterence,” and then turned around and winked at me. I don’t even think that’s a word. After she scanned each bar and put them in a bag and started to say the price, he kept interrupting her by yawning really loudly.
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>>8517299
I didn't grow up in the US and never heard of his until my 20s, so I don't have nostalgia glasses when talking about him. All I know I got from interviews and talks he held.

And, basically, he just doesn't seem that smart to me. His opinions are shit, with shit reasoning and shit explanations. His credentials also completely fail to impress.

What's his appeal, or why do so many Americans hold the guy in such high esteem?

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What is a mean field approximation please?
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>>8517237
Sorry, I've never heard of a "mean field approximation please".
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>>8517257

what's wrong with you?
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>>8517237
Imagine you have lots of shit all contributing to a particular phenomenon, it'd be a pain in the balls (and perhaps intractable) to handle all the components individually so instead you take some dominant components of each field and you just average then together and hope for the best.

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Many people seem to struggle with the Monty Hall problem. Even I did for a while, until I came up with this different way of explaining it.

Normally, people lump the goats together to say there is 2/3 odds of picking Goat, and 1/3 odds of picking Prize. While obviously true, this can lead to confusion in Rd 2, once a goat has been eliminated.

Instead, keep the goats discrete. This means there is 1/3 odds of picking Goat A, 1/3 odds of Picking Goat B, and 1/3 odds of picking Prize in Rd. 1.

This makes it easier to see that in the first round, you are not so much picking a door as you are choosing which goat to eliminate. Because Prize will never be revealed, and the chosen door will never be revealed, there is 1/2 odds you choose Not A, and same for Not B. Importantly though, Prize is included in BOTH groups. This means that the 1/3 chance of selecting prize is split between the two choices.

So, if Goat A is revealed, you know you have chosen Not A. While there is a 1/3 chance of having picked Prize, there is only a 1/6 chance of having picked Not A by choosing Prize. Meanwhile there is still a 1/3 chance of having picked Not A by choosing Goat B. Whether you pick Not A or Not B, you are half as likely to have done so by choosing Prize than by selecting a Goat.

I think this method makes the probability easier to follow for people who need to "see it to believe it." It clearly demonstrates how the odds of Rd 1 impact the odds of Rd 2, driving home that the odds that something will happen are not the same as the odds something has happened.

Something, something hindsight.
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>>8517172
mfw this thread.
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>>8517558
kill yourself tripfag
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>>8517172
That's a complicated way of saying that your first choice is likely wrong (2/3 probability), and the other wrong choice is eliminated by the host, which means the remaining door is more likely to be the right one.

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