Archived threads in /sci/ - Science & Math - 599. page
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http://www.free-iqtest.net/
I literally clicked anything at random
nice test
140 according to this online test
Probably very reliable :^)
>>7683235
OP gettin rekt
>ask a math who completed his undergrad if he knows what modus ponens is
>"Nope"
>What about sequential calculus / basic symbolic proof?
>"No"
>show him a basic example of the use of basic inference rules
>he says he never encountered this
Are math programs really this shitty? Should I stay in CS? How the fuck do math undergrads do proofs if they don't...
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>formal symbolic proof
Yes, your kind should stay in CS away from the rest of us.
>he thinks proofs correspond to modern inventions of formal logic theory and not vice versa
You're a CS student, alright.
can someone explain to me why the fuck this would not work?
>>7683187
Geothermal energy is a thing but its not very accessible everywhere.
And it wouldn't be "unlimited"
>>7683187
http://www.google.com/url?q=https://en.m.wikipedia.org/wiki/Kola_Superdeep_Borehole&sa=U&ved=0ahUKEwjz2rzKw67JAhWCGz4KHc_cD1oQFgg6MAk&usg=AFQjCNFeBVo7RD5CKhYYp1t_MxTQ5-DiQA
>>7683196
>not very accessible
literally everyone on earth theoretically has access to this kind of power
I've heard that 85% of succeeding in getting a job and working in STEM is due to social skills, which is quite little compared to other fields. Is this true? Is being able to get along with people more important than being able to solve problems?
So there is no luck in it? Or are you considering luck to be inside social skills as a karma thing?
>>7683144
this is pretty accurate, i was a top stem student who got nowhere in the field because of autism
>>7683144
>shockingly
found the butthurt NEET nerd permavirgin
This is the Serpentine Tower a puzzle tower from a very old MMO that has remained unsolved for 10+ years now.
I'm here to ask about one of the books in the tower as far as I know no one has managed to translate it. Is there a way to prove absolutely if this message contains real information or if it is just rubbish added for color? As far as I can tell it is unlikely to be something like OTP. Also from the history of the game they did use an in game "orc language" players had to use prior to the creation of this tower in 2004.
If it can be ruled...
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Contents of Book
Mehrah asram cha mehe than. Uth a'thul at cha there. Orum tha cha elik jahara. Udhun zah fahr mal. Chamek at uthul hatradek asram. Mehrem alir iktha at uthun. Kasin tha Ur ch helim doh. Mah dah direm. Athul as hathu, athul as dofah, athul as mereth. Cha ukhtu muhn dahra. Sethor mah amin dah. At meruhm cha me dah. Chamek persim kaharah bah tufi. Moh dah rah. Moh Udhin cha uthul. Meheth Zuhl tha berah.
>>7683106
Are there any other clues throught the game?
You gotta post more info that that, OP.
>came to /sci/ a couple of days ago bitching about switching majors cause I didn't get linear algebra
>get called a faggot and to go study
>do that
>mfw passed with a 9 out of 10
Thanks guys, good academic feels thread I guess.
>>7683087
You're still a CS major
>>7683094
that is a good feel, yes
>>7683087
congrats! keep up the hard work. You can do it. Also linear algebra is prety cool. Although when I learned it it was taught in a very unintuitive way sometimes. Like why didn't they mention eiegen vectors when we learned about matrix kernels even though they are related?
Any real engineers here? Can anyone recommend a book on gas turbine construction? Like the actual construction not just theory and super simplified diagrams. I want it for my hoverboard research. I have spent a while researching compressors and turbines and practicing drawing them with CAD software and 3D printing models so I'm familiar with that part but I'm not confident about the rest of it. Major gaps in knowledge are the oil lubrication system and the combustion chamber. So far I've seen amateurs like myself hooking up two turbochargers and for the combustion chamber they always punch "flame holes" of increasing size but I don't understand why that allows stable combustion.
Bumping for interest... also I think I know one, let me try to find it.
>>7683122
Thanks. Post it when you find it.
Nobody here knows anything about turbomachinery? Should I take this to /diy/?
14 year old Lucas Etter has set a new world record for completing a Rubiks cude: 4.904 seconds, 0.35 seconds faster than the previous record.
He set it as the River Hill Fall competition in Clarksville, Maryland.
Speedcubers get 15 seconds to inspect the cube before attempting to solve it.
The world Rubik’s cube championship has taken place every two years since 2003, and world records – first set at 22.95 seconds by 16-year-old Minh Thai in 1982 - have been nimbly demolished ever since.
http://www.theguardian.com/technology/2015/nov/24/teenage-boy-lucas-etter-solves-rubiks-cube-less-than-five-seconds-new-record
Pretty...
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>>7683042
And how is this /sci/ related in any way?
>nerd shit
>>>/out/
>>7683048
http://news.mit.edu/2011/rubiks-cube-0629
I was watching some aircrafts videos and I'm wondering, how the engines work ?
I mean the air intake engine needs alot of electricity to work, Where the hell jet fighters get electricity from ?
>>7683020
Air intake fan is connected by an axle to the turbine.
After the engine is spun up so that there is enough pressure for combustion, the exhaust gases going through the turbine power the intake fan and provide thrust.
>>7683019
so, now that libgen is getting shutdown,
where are you guys going to find books?
>picunrelated
>>7682964
pic made me shiver tho
So making a videogame is the solution for world peace?
>>7683075
It's not shutting down. The person who runs it got served a preliminary injunction by a US court, but being Russian, basically said they don't give a shit.
how good does human blood (not menstrual) act as a fertilizer?
Probably just as good as any other animal's blood.
Blood meal is used in fertilizers so probably it would be somewhat effective.
too salty, like seawater
wrong minerals
>>7682937
Menstrual works best.
It's meant to nourish a life from conception to birth. You can revive a dying plant with menstrual blood. Any other blood has too much pain and death in it.
![51487132[1].jpg](https://i.imgur.com/pNAB3w2.jpg "51487132[1].jpg")
If a schizophrenic could use math and logic to get rich as fuck, why haven't you?
>When Sartory retired in 1992, he shut himself in a tiny apartment and used algorithms to invest on Wall Street. The savant built a $14-million portfolio before the stock market crashed last year, records show.
http://articles.latimes.com/2010/jan/07/nation/la-na-scientist-murder7-2010jan07
... becoz not schizophrenic?
Also you're L.A.Times a shit
>>7682914
http://www.independent.co.uk/news/world/americas/the-schizophrenic-genius-whose-worst-fears-came-true-1862415.html
>>7682914
I'm not schizophrenic, but I am.
German scientists receive one copy of pic related in 1938. Can they reverse engineer it in time to get a war-winning technology boost?
Why on Earth would they want such a horrendous piece of shit? Give them something useful, like an A-10 or F-15.
>>7682802
Hahaha
The F22 is single most capable fighter in the world to date.
>>7682822
>The F22 is single most capable fighter in the world to date.
>plagued by mechanical problems and a bloated development and unit cost
>capable
Only of failing at the worst possible moment.
![400px-X_hoch_4.svg[1].png](https://i.imgur.com/fVXkkzR.png "400px-X_hoch_4.svg[1].png")
This is a dumb question. In school you learn that f''(x) describes the curvature of your graph. But this can't be the whole story looking at any function of even order >2. Example, f(x)=x^4
What is the real relation between curvature and f'' ? Does f'' describe curvature for all points EXCEPT when it's 0, where you have to look at further derivatives?
>>7682782
no, thats exactly what it is. the curvature.
whats the problem here?
Just because it LOOKs like it's 0 in a wide range doesn't mean it actually is. That's just the limitations of visuals. x^4 is only 0 when x = 0.
Anyway "curvature" is a rather nebulous description. The derivative of a functions more often explained as the slope of the curve at a certain point (in which case the points near 0 would be CLOSE to 0, but not exactly 0 except at 0). Or, more generally, the change in the value of f(x) with respect to the change in x (which is actually its definition).
>>7682786
My problem is that I don't see how x^4 differs from x^2 in terms of curvature.
Both tend upwards both ways from x=0.
So how can the curvature of x^4 be 0 (when that of x^2 isn't)?
Is Richard Dawkins the hero we need?
http://edition.cnn.com/2015/11/25/europe/uk-richard-dawkins-clock-boy-ahmed-mohamed/
>>7682770
Dawkins is dead dumb when it comes to talking about anything that is not biology.
>>7682770
Media is disgusting.
This is what I like most about Unreal Tournament. Their hypothetical projection of the future seems entirely accurate. Eventually media will devolve into an informal mass of disjointed heavily skewed critiques. Then it'll become emotion driven sensationalism for the obvious political and economic advantages. Then it'll devolve further to the equivalent of dog fighting. Then reality TV and other such shit will be about killing each other. Two of those re already done. "CNN...
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>>7682770
No he caved into pressure within a day
