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What do you think if racial differences in IQ and how do you think we could explain them through the lens of evolution ?
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>>8899395
A better question would how much does culture contribute to IQ? That's something we can actually attempt to fix without eugenics.
Yes It's mostly genetic, but I always wonder if the difference between East Asian IQs and European IQs can be explained by culture.
Asian countries seem to be more rigorous ans soulless, with kids getting forced to go to cram school.
While European countries the attitude is more one of "You studied for your math test? NERD ALERT! NERD ALERT! NERD ALERT!"
The same kind of culture exist for blacks living in white countries, but it's even worse.
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>>8899414
Okay, have fun coming up with a proxy for "culture" that everybody agrees with and then quantifying that.
Or you can just take shared+unshared environment instead of "culture" and have it be 1-x where x is the estimated narrow sense heritability, like every behavioral geneticist has done with every single trait including IQ. It's better to just estimate the heritability and then infer the environmentality from that, especially since things like the Abecedarian project showed the relative non-malleability of IQ.
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>>8899414
But we could ask the same question but the other way around, doesn't IQ dictate the culture ? Because I don't see how since we are all the same, since we can trace back a few ancient ancestor of even a thousand, I don't see why all population wouldn't have developed the same IQ over time. But the question isn't that interesting since culture is only the result of evolution. And that culture of
>"You studied for your math test? NERD ALERT! NERD ALERT! NERD ALERT!"
might be a problem and could lead in a slow down of progress... That culture exist here too (Belgium) but is most observable in "ghetto" schools
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Engineers of /sci/: How would you solve this?
189 Posts / 24 Images
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>>8890554
Break the glass.
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>>8890554
be quick af
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>>8890554
Just open it a bit and smoosh one hand in to push the plate back. Use my knee to catch any that might fall.
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Describe an algebra based physics course to me
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>>8902693
https://www.princeton.edu/~hhalvors/aqft.pdf
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>>8902693
round gravity to 10 and assume a frictionless plane
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Everything is a point in a vacuum because physicists are unable to solve problems that model reality
Anonymous
How do you force yourself through classes you don't like? 2017-05-11 10:52:06 Post No.8902406
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How do you force yourself through classes you don't like? 2017-05-11 10:52:06 Post No.8902406
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How do you force yourself through classes you don't like?
Anonymous
2017-05-11 10:52:06
Post No. 8902406
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I fucking loath any class that has to do with systems theory. They are just so fucking tedious. The math is not hard and follows easily. The applications are clear and interesting but what we do in class is just
>here's this linear system with these properties
>you can make it behave like so if you apply this feedback to it
>here is how to test for these properties
It's just rote learning of boring math.
I feel like if I ever needed this stuff, I could learn it as I go. I could cover the class material in just three days.
Like what's the fucking point of these classes? I fucking hate them.
Tell me about your boring classes and how you get through them.
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Mandatory American cultures course. Pretty much just liberal propaganda.
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>>8902487
>Learning about things that actually exist, like cultures.
>libruhl properghanda
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Environmental issues
>hurr durr we're fucked
>hurr durr we're gonna die
>hurr durr kill yourself or the sea levels are going to rise
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I recently made a DNA test. My father was from Sierra Leone and I found out something quite extraordinary: from his side of the family I had approximately 1% Papuan and 1% Native American from the Amazon. As we all know, these were not places from which people travelled to other countries or continents. How on earth could a Papuan from Oceania or an Amazonian from South America end up in Africa? These were all countries that were visited by the Portuguese who had slaves, right? Yet I'm not aware from which countries they had slaves from. I hope this will spark some interesting conversation. Thank you.
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genetic testing isnt 100% accurate
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>>8901162
the complete reverse of what you're proposing has happened
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>>8901179
I know, but coincidentally (?) all of these countries (Sierra Leone, South America, Papua-New-Guinea) were places from which the Portuguese took the natives and enslaved them, transporting them to the New World. If Portugal didn't have any sort of history with one (or any) of these countries, I'd brush this off as just statistical noise as well. But the fact that Portugal enslaved people from every single one of these countries and transported them to the Americas. Plus, the Sierra Leone Creole people were descendants of American and other African slaves who were transported into the country between the late 1700s and the late 1800s. I'm approximately 1% Papuan and 1% Amazonian which means that they were my ancestors from the late 1800s, implying that perhaps they were ex-slaves that were transported to Sierra Leone and having children with the local people? This is very interesting. If the test had shown me to have Papuan or Amazonian blood from the 1900s, I would've taken this with a grain of salt. But everything here connects with each other (all countries were places where the Portuguese took slaves from, in Sierra Leone the Creole people/ex-slaves landed into their new home country in West Africa in the 1800s, my Papuan/Amazonian ancestors were from the 1800s).
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Suppose I don't believe human visited Moon. Let my argument be it is too far away (4 E8 meters) for that much weight (3 E6 kg). Current satellites of that time were 100x closer (3 to 4 E6 meters) and 100-1000x times lighter.
Distance from Earth to Moon (meter): 4 E8
Distance from Earth to satellites of that time (meter): 3 to 4 E6
Mass of rocket that is claimed to brought humans to Moon (integrale of kg per meter):
>3 E6 to 5 E4 from Earth to 2 E5 (at that point module was separated from carrier rocket)
>5 E4 to 5 E3 from 2 E5 to surface of Moon
>With 5 E3 from surface of Moon to Earth
Mass of satellites of that time (kg): order of magnitude E3 to E4
I accept that unmanned devices did land on Moon. Latest lunar orbiter had a mass of 4 E3, 10x lighter than manned spacecraft.
In anticipation to the most common counterarguments
>There is a reflective surface in Moon that the men installed. You can shine laser onto it
Unmanned device could've easily planted that. I accept that reflective surface of that kind couldn't have formed spontaneously.
>Why would they fake a moon landing?
Power display. USSR and USA were heavily influenced by competition that could've driven them to such acts.
>What difference does it make whether they were on the Moon or not?
Humans have unrealistic expectations on space transportation possibilities. I want to reinforce the concept that humanity will (1) never live on any other celestial body other than Earth (2) never be able to transport any instrument outside the Solar system (3) never find extraterrestrial life. These realistic expectations will possibly lead to better environmental policies.
In conclusion: I claim a human has never touched the surface of Moon and returned alive.
How would you attack my claim so that I myself could reproduce the results? Merit of science is that in principle anyone could verify what you say, and that for a claim to be true, it must also be verified by someone else (for example, not USA).
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saged and hidden, i suggest you all do the same
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>>8900982
Response type #6.
>Subject states that the conversation space is irrelevant.
Thank you for your response. I will catalog the type of your response to my study.
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>>8900984
make sure you catalog this one as well so everyone can see it. You're a faggot.
Anonymous
I hate myself for asking, but can one of you nerds please explain this? 2017-05-11 01:37:34 Post No.8900088
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I hate myself for asking, but can one of you nerds please explain this? 2017-05-11 01:37:34 Post No.8900088
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I hate myself for asking, but can one of you nerds please explain this?
Anonymous
2017-05-11 01:37:34
Post No. 8900088
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Mathematicaly, if possible.
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>>8900088
fuckin google it brainlet
l2 fucking circles
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>>8900088
V=d/t
Same t, larger d, so larger v
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Angular velocity is different from velocity.
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Pic related. Serious question.
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>>8899702
lie down sideways
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>>8899702
From the side?
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Ass ta ass
Tails going opposite ways
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Does meditating really increase your IQ or is that just a meme? Can anyone link a real study?
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Blaah blaah blaaaaaaa
Blooh blooh bloooooo
Roses are red
Violets are blue
Please marry me
Heres my iq
Im a big brain
Just 4 myuuu
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>>8899612
quality post. now off yourself my man.
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>>8899574
Try it yourself fucking mong
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>tfw all your pondering about life has been a waste of time as life is just flow of chemical reactions from an event that happened a bajillion years ago
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>>8899361
for me that's 1000x more amazing than some supreme being flicking his fucking finger and conjuring up everything and giving me free will to roast me forever if I use it the way he doesn't want me
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I am LITERALLY eating cinnamon right now
SO TASTY!!
xD RANDUMBZ!!
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>>8899361
What are chemicals?
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Not falling for this low quality bait.
Get some treadmills and free-spinning wheels in the equation and we can have a discussion.
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>>8899179
>what is inertia
This board is not the place for highschool dropout brainlets. Please leave and don't come back.
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Whats the best book for category theory?
my class is using 'Categories for the Working Mathematician', but I dont like it. I got a couple of other textbooks which are a bit better, but im still struggling and im hoping even more textbooks will make me understand it even better.
Specifically every time I get to natural transformations i dont know what the fuck is going on, I cant even get through the proof of Yoneda lemma.
And holy shit why is the notation so inconsistent? each textbook I see calls everything something completely different.
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Why don't you like it and what are the other books you have?
The standard, 'Categories for the Working Mathematician', can be a tough intro.
There is a book by Adwodey, but it's for CS people, mostly. Then there is one by Simmons, which does drawing diagrams as a tool very right, but lacks examples.
For the most part, knowing examples is the most important aspect, otherwise it's stale. Understanding the sense in which isomorphisms replace equality in the theory (as a theory itself I mean, written down in logic) is also quite relevant.
I don't know why you have a problem with natural transformations. Then /maybe/ look at functors as a homomorphism for functions an [math] \circ [/math]
[math] F(f\circ_C g) = F(f) \circ_D F(g) [/math]
akin to
[math] \exp(x+y) = \exp(x) \cdot \exp(y) [/math]
and a natural transformation as a homotopy of such homomorphism.
Whatever is the range of the one homomorphism (functor), you can direct it through the homotopy (natural transfomration) to get the image of another.
>Yoneda lemma
Then /maybe/ Try understanding the Yoneda embedding first
Depending on how quickly you need to learn it, I'll discuss category theory in a series of youtube videos this year.
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>>8899187
I may add..
a few years ago I tried to flesh out the common Yoneda lemma proof diagram in a way that displays all it's components and helps visualizing stuff with color. However, I post this only reluctantly since it may or may not be confusing to anyone else
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oh and thirdly, not that instead of the axiomatization of a category via
>objects and hom-sets
there is an equivalent axiomatization via
>arrows, source map and target map
That is to say, objects are a spook, they are optional to talking about categories per se
Anonymous
Alternative lifestyle as a /sci/entist 2017-05-10 08:39:08 Post No.8898378
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Alternative lifestyle as a /sci/entist 2017-05-10 08:39:08 Post No.8898378
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Alternative lifestyle as a /sci/entist
Anonymous
2017-05-10 08:39:08
Post No. 8898378
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I am a PhD student in chemical physics. My life has been centered around science for the past five years, becoming proficient in mathematics, physics, programming, chemistry, and statistics and doing research.
Recently my attitude towards life has changed. I feel that there is more to it than spending most of my mental energy and time solving problems in a room of quiet people. I have no interest in going the path of postdoctoral research and {unemployment, grant writing}.
I am very interested in pursuing the so called alternative lifestyle. I'm drawn to self-sufficiency, exploring the world with a boat/van/bicycle, meeting interesting people, and being in solitude with my mind for long periods of time.
Is there a way to solve interesting problems while being a digital nomad or should I just STFU and learn web development?
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Don't have much to say, since I've only studied math, but it's an interesting topic. Have a bump.
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It seems that you need a vacation. I doubt you'd really enjoy being a hippie in a van for most of your life. I'm a bit tired with my PhD studies, but somehow manage to get things done and to not drastically change my lifestyle.
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>>8898378
Should have studied condensed matter physics. In that field you can literally make breakthroughs with water and a fucking portable heater.
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What is /sci/ taking next semester?
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>>8897422
I'm taking Unit Operations, Senior Design, Materials, and probably a Renewable Energy course.
Should be a good semester.
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Summer:
Gen Ed Lit class
Calc 2
Fall:
Gen Chem 2
Gen Chem 2 Lab
Calc-based Physics 1
Calc-based Physics 1 Lab
Fundamentals of Higher Math
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How do we actually know black holes and relativity exist? It seems like baseless conjecture that people believe religiously. Furthermore, it seems more and more like a fake narrative when you realize the cult pf personality around Albert Einstein. If you even think about suggesting that Einstein may have plagiarized his work, you're finished.
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>>8896369
>I don't understand something, must be fake
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>>8896383
This, also almost every thread on /sci/.
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>>8896383
If "understanding" is synonymous with "accepting blindly because it makes sense on paper", then yes. Not that I'd expect any other response besides "lol ur just dumb". Protip: you're not helping your case when all you can do is condescend instead of actually arguing. It just helps further prove my point.