Archived threads in /sci/ - Science & Math - 480. page
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Can someone here explain to me how narwhal tusks spin in the same direction? All other animal tusks point/spin in different directions from one another.
>>7772660
because evolution is not real, otherwise the narwhal would also have tusks spinning differently.
If i recall, it's the spiral nature of the tusk that keeps it relatively straight. That and nature would select against a curled tusk due to increased drag through the water.
>>7772695
That's not what op is talking about...
https://en.wikipedia.org/wiki/St._Petersburg_paradox
If I understand this paradox, the game has an infinite expected value, implying that you should pay any amount to play it. Given enough time, you'll always eventually win.
The proposed solutions to the paradox all seem to be based on the idea that the player wouldn't have infinite money to start with, therefore, he couldn't play long enough to actually get ahead.
I think there's something missing from these solutions, though. Even if the player did have infinite money to start, there...
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hump
Not a mathmatician, but this actually really interests me. Can any smart people give me a 5-year-old's explanation of some of the proposed solutions?
>>7772653
I think it's just not a well-behaved problem, so not even millions of games are enough to be statistically significant. The expected value is infinity, but so is the standard deviation.
So one of the hypothesis to why alien life hasn't visited us before is "They aren't interested in us." (This is also assuming an alien race also has curiosity, which isn't out the realm of possibilities)
Why aren't they interested in us? Well if even 1 out of 1000 solar systems harbored life, it would still be teaming with it. So why would the human race stand out of all other systems that harbor life?
How come we aren't making ourselves interesting?
How could we make this tiny blue dot interesting to extraterrestrials /sci/?
Even if they can travel relatively close to the speed of light, why would they travel 50+ lightyears just to see us?
>>7772554
Please reread the basis of this post
>>7772521
Its spelled teeming in the sense that you meant it
Also aliens do not exist
Most inspirational scientist of the 21st century thread
>>>/pol/
Stay on your containment board.
>>7772464
>CPU on google images
Oh my God they're not even trying to look convincing anymore.
>>7772487
What? I'm congratulating this inspiring young man for revolutionary inventions in the field of clocks
Have Stephen Hawking and other physicists solved the black hole information paradox?
http://arxiv.org/abs/1601.00921
I don't fully understand the paper, does this mean we can extract information from black holes?
Come on, where are all the astrofags?
>>7772395
the wheelchair dude did
THIS IS BIG FUCKING NEWS WHY IS NO ONE REACTING
"Theory"
"Sampling theory"
"Quantization theory"
"Color theory"
"Music theory"
"Theory theory"
"Theory theory theory"
Am I the only one completely sick of this shit? We're going to get to the point when quite literally every single phenomena and process the human mental machinery can conceive of, will be formalized and had "x theory" slapped onto it. It's utterly obnoxious.
I get it. A theory is a framework that's gradually changing and being refined,...
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>>7772331
From the experience I've had discussing these things with doctors: the same thing holds true in mental health, professionals openly admitting that the reality of the factor is everyone should be on drugs for some thing or another, but the real kicker is: as modernization continues that of a sober life will dissipate into every person trying to deign themselves as a superior person and the designer drug focus will trump every other commercial aspect as people take into the account the potential long term enhancement...
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>>7772347
Psychiatry and a decent proportion of (American) medicine is a complete sham, scam, mess. "Mental illness" is the most persistent delusional belief system around. It's amazing what the human race has done, and what we now can be aware of, yet the majority of us cling to such inane ways of framing the world.
It's pretty disgusting. I'm pretty disgusted I have to share a planet with these broken, deficient excuses for people. I don't want to hate em', but no matter what, part...
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>>7772331
sampling is srs biz you idiot
Hey, /sci/,
Anyone know of any 'accidental' positive discoveries resulting from 'destructive' research? Google has given me next to nothing, and I'm struggling here. Need it for an assignment for college. I'll research more into it, I just need something.
Thanks
Nazi freezing experiments
>>7772171
Marie Curie.
>>7772171
fleming & penicilline
rosenberg & cisplatin
nobel & nitroglycerine (as an angina pectoris medication)
I have multiple sclerosis. It's been affecting me for years, but I wasn't diagnosed until a couple years ago. I have really bad flare-ups that tend to last for months, including one that started on Christmas Eve 2015. My right hand really hurts, like knives sliced my fingertips open and trouble moving my right arm. There was one attack in mid-July that has persisted in both hands, 15 different hospital visits for SoluMedrol treatments, but it didn't help. It sucks, but there's no need to go further into that.
My question is, can dogs smell or sense...
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I don't even know what multiple sclerosis is. But considering there's ways to detect diseases that aren't immediately apparent and aren't a biopsy, I wouldn't discard it.
Or maybe you just act spastic around the dog.
Either way, good luck, mate. Have a cake, take a shitload of drugs and fuck that dog in the arse while you can.
>>7772182
I don't act weird around the dog, just normal conversation with my mother. I don't do anything with the dog or say or yell at it any.
Multiple sclerosis removes myelin sheathes from certain cells around the spine and brain, causing inflammation and lesions. It often causes problems with mobility and pain and extreme fatigue and other problems. Some people are in wheelchairs, which is probably my fate eventually.
>>7772162
They arent plebs m8
Pretty sure dogs install gentoo on their free time
How do i solve system of congruences if gcd of mods is not equal to 1(which is ussualy done with chinese remainder theorem)?
For example this system
x(congruent) to 21 by mod 36
x(congruent) to 5 by mod 8
I ussualy solve this with chinese theorem of remainder but in this case gcd is not 1 equal to 1..
Anyone has any tips on how to solve this ?
make it so that the gcd is 1
How do i make this system so that gcd is 1 ? I dont get it,i dont think you can do it.
>>7772137
For the system you provided, try the following:
The first equation says that [math]x[/math] is of the form [math]36t + 21[/math]. The second equation says that [math]x[/math] is of the form [math]8r + 5[/math].
So we have [math]36t+21 = 8r + 5[/math]
[math]4*(9t-2r) = -16[/math]
[math]2r - 9t = 4[/math]
There, now we solve for integers [math]r[/math] and [math]t[/math] that satisfy this equation (which I would think you should have learned how to do) and plug back into the original equation...
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How important is Rigor in maths? Is it taken to an extreme in academic settings?
How much Rigor would you consider excessive? Can we learn the same things / be as efficient in our applications of math without rigorous proofs & study?
I mean, look at the example image, "remember" is at the bottom and that's as far as medical school will take you really, and doctors are esteemed and successful in their practice.
Perhaps mathematics has indeed practiced excessive rigor without a purpose, you think?
>>7772032
You're conflating academic education with success in medical practice, sir. Medical school alone focuses on remembering and understanding, but learning to practice and practice well requires application, analysis, and evaluation.
I realize that point is tertiary to your argument. Just thought I'd mention.
>Can we learn the same things / be as efficient in our applications of math without rigorous proofs & study?
Yep. Applications don't require proofs.
>Perhaps mathematics has indeed practiced excessive rigor without a purpose, you think?
Nah. My thoughts on this are that mathematicians have to be as rigorous as possible to lay a groundwork that's unquestionable. You can't lay the groundwork for literally all science that isn't pure mathematics on "Meh, looks fine to me".
>>7772032
Mathematician will keep working as rigorously as they can until they can not advance anymore.
How many /sci/ people use Linux?
Why?
>>7772024
so much easier to do work outside of enterprise thanks to the powerful terminal and allowing exposure to powerful but ugly tools.
ok, let's start counting
1
Why? I didn't like the design of Windows 8, that's when I switched.
>>7772024
I use windows 7 on my desktop.
xubuntu on my laptop.
its free.
does what I need for school.
windows 8 and 10 are too annoying.
terminal is bullshit though, only person I see ever "needing" it is sysadmins/similar, big emphasis on the quotes.
Hi /sci/.
Frenchfag here ,18 years old and studying at the university of Paris 11 . Here's my problem , i like physic and i'm rather strong but after 4 month at the university, i think i really need to improve my math level because if i want to be engineer or physicist and for this i'll need to be damn good at math cuz it's getting insane for me (Paris 11 math lvl is ranked 7th of the world just behind Stanford )
So pleasz guys can you give me any tips,any advice like a special train so that i can be better everyday ?
Thank you in advance and...
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why did you post that image?
>>7772062
I only have ylyl images (from /b) on my phone ...
>>7772003
There's nothing beautiful about maths. The only thing you can do with them is PRACTICE. More and more. Keep doing many exercises, and you'll end up liking them.
The more you like them, the easier they will stay in your mind during and after you study.
I need more practice because I still think they suck. Whenever you can study and do anything so that you like them, belive me.
nice pic bro, I would't have ever thought of those two motherfuckers together
please recommend an interesting book on consciousness. something between rigorous academic text and pop-sci. I read G.E.B. and enjoyed it but didn't really like his writing style
Not sure if you're looking for "scientific" books, because then all you'll get is pseudo-science & popsci garbage.
Otherwise try Schopenhauer.
>>7772212
Retard.
Literature on consciousness:
Baars, B. J. 1988 A cognitive theory of consciousness. New York, NY: Cambridge University Press.
Cleeremans, A. 2008 Consciousness: The radical plasticity thesis. Progress in Brain Science, 168, 19-33
Crick, F. & Koch, C. 1990 Towards a neurobiological theory of consciousness. Seminars in the Neurosciences 2, 263-275.
Crick, F. & Koch, C. 2003 A framework for consciousness. Nature Neuroscience 6, 119-126.
Dehaene, S., Sergent, C. & Changeux, J. P. 2003 A neuronal network model linking subjective reports and objective...
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Is there any debate over the fact that humans are monkeys?
I hear many people say we share a common ancestor with monkeys, but are apes.
If I'm understanding phylogeny correctly, then modern monkeys diverged from an ancestor shared with humans that was a monkey taxonomically.
So, if we are primates (which I've never heard disputed) and we are apes, then we are also monkeys, right? At least we're in the same clade as monkeys.
>>7771908
Not exactly. We are primates which apes and im pretty sure monkeys do fall under but that doesnt make us apes or monkeys. Just cousins ;)
It's all a question of definition.
By that logic we are as much apes and monkeys as we are that ancient fish we evolved from
What does /sci/ think of vaccines?
DEPENDS
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also I want reddit to leave.
>>7771804
>I want reddit to leave
you are excrement
>What does /sci/ think of vaccines?
they're necessary, now fuck off, imbecile
>>7771822
/thread
