Archived threads in /sci/ - Science & Math - 395. page
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I would like to hear your educated opinion on the following points.
1) What was there before the big bang.
2) Why did the big bang happen.
3) How do black holes not violate the 2nd law of thermodynamics?
4) What happens when the universe comes to an end.
5) Is it possible that parts of the universe that have yet to be observed violate the 2nd law of thermodynamics, and what would that look like?
Cheers
1) Nothing, time began and so did the universe at that moment.
2) However if you believe in the multi-verse, string theorists hypothesize that the big bang was the collision of two universes. There are many more hypothesis some stronger than others.
3)Hawking Radiation
4)Depending on the cosmological constant, the universe with either keep on expanding (gravity between all the objects in the universe does not overwhelmingly attract), become stagnant and static (gravity eventually equals out) or there will be a big crunch or reverse big bang (gravity overwhelms all...
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>>7809175
How do universes collide, wouldn't there need to be something that contained both universes? Sounds paradoxical. And isn't the universe geometrically flat?
>>7809188
No space time is (as far as we know) "flat" which means euclidean geometry works.
That has nothing to do with being flat as you and I imagine it
Hey /sci/
What's the best resources for learning Machine Learning and Neural Networks. Specifically I'm looking for books to read since I have a long commute to work without internet access.
So far I've been doing the coursera course here https://www.coursera.org/learn/machine-learning/
and watching the YT series on neural networks with Java here
https://www.youtube.com/playlist?list=PLHIAnqK_uV8FJlIh04cUMZMPWNHryN7Ma
I realise Java is pleb tier language for ML but it's what I know. I wan't to get the basics down before...
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>>7807725
>So far I've been doing the coursera course here https://www.coursera.org/learn/machine-learning/
That course is not the same course that andrew teaches at stanford.
MATLAB.
I just had an idea /sci/entists thag should have been implemented a long time ago, the thing keeping extremely large ships from leaving earth is weight, right? Well then, why don't we just assemble the ship in parts in orbit instead of putting it all together here on earth? Is it too expensive?
>>7807288
Yeah, that's how the ISS and other things were constructed.
>>7807299
Yeah, but like, a ship that's meant to get out of orbit.
>>7807288
That actually kind of makes sense unless you intend to carry things on the ship, because then you'd need another ship big enough to bring that stuff out to orbit
Assume a solid disc of such a radius that at 1 rpm, a point on the outermost edge would travel at an angular velocity of 0.9c (or any relativistic speed).
Further assume that it's made of such a material that it doesn't break in any way under the strain.
What, if any, are the relativistic effects of a solid body where there's some portion that's at zero relative speed to the other portion of the body?
>>7807248
Is this a variation on Ehrenfests paradox?
>>7807248
wouldn't it just look like half its size, with the outer half being too fast to see
>>7807248
>What, if any, are the relativistic effects of a solid body where there's some portion that's at zero relative speed to the other portion of the body?
The relativistic effects are that the body does in fact break and your assumption is contradictory.
Anyone got any Math movies that are actually about the fucking Math? By that I mean no Good Will Hunting / Imitation Game shit that's about "muh poor misunderstood genius" but an actual Math movie.
A Beautiful Mind is a movie about a mathematician and I think thats the best you are going to get.
That's a documentary giving a flavor of the working life
https://vimeo.com/18216532
I sort of kind of also like the BBC series Dangerous Knowledge with 20 minute segments on some giants who killed themselves (Cantor, Boltzmann, Gödel, Turing),
but I don't really want to recommend it too much for the cringeworthy attemps to explain the math behind the issues they talk about.
There is a really good PhD thesis turned history book called "Modern algebra and the rise of mathematical structure" which discusses the perception of the meaning...
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Rain Man
Did anyone else go to a university of a lower standard than what you could've gone to? I had the best grades in my school, better grades than almost anyone who goes to private schools even though I went to a regular school, and had good enough grades for any university in my country. But I had zero advice about the importance of university rankings, the worth of degrees etc. I picked an engineering degree at my hometown university. It definitely wasn't a disastrous choice in terms of career (respected subject, plus a university ranked in the top 150 of the world) but...
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>>7803671
I thought most undergrad classes were watered down filth taught by people pissed off at having to teach something below them to idiots, half of whom would drop out before the end of the year.
>>7803671
Did you already graduate?
Do you have a job now?
Is this just a regret thread for the sake of regretting?
>>7803671
If you're so smart you'd realize that formal education is primarily about purchasing credentials. The education portion of it is a distant second, it's only there along with testing to screen out retards so the credentials still mean something. If every degree required you to know the full width and breath of a certain subject matter, you'd be in fucking school until you were 55 years old.
You got your fancy paper saying you're passably competent, if you're still curious, go research...
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I have never got the whole "alien invasion" theme. Wouldn't aliens be happy to discover us, and try to actively communicate like we do? Surely we can't be the only ones who do this. The only imaginable driving force for the sufficient technology to discover extra-terrestrial life is curiosity, and that's what also drives us to want friendly communication. It's also what asks the question "are we alone in the universe?"
I see these alien invasion movies and it's scaring people, but I can't grasp how people can think that's...
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>>7808545
Actually, wouldn't this belong to a philosophy board better?
I think I might have fucked up here.
>>7808545
you don't care about ants feelings if you want to build a house on their anthill. It really depends on how advanced they are compared to us.
Also they could be used to discovering civilizations as advanced as ours, and think nothing of destroying us, maybe it's even the moral thing to do for them.
>>7808545
So... aliens do not have the same motivations or goals as humans. They can build a habitat in space if they need to, to house any number of their species, they do not need to 'colonize' our planet or any other planet. They can get resources from literally everywhere, there is no natural material they can't get somewhere or produce themselves
Nor do they want to make 'friends' they have everything they need. Nor are they 'curious' they already know who we are and how we're going to turn out.
The only single interest they have in humanity is our DNA. Also the DNA of other creatures on earth.
We are the only weirdo species ever to think conquering habitable planets is something that is 'natural' to intelligent species or to think there is somehow a competition for resources in a practically infinite galaxy.
Assuming of course we can ensure fertility, would it be possible to create a subspecies of human by breeding a population of trisomy patients? If you look at evolutionary history, many big leaps are facilitated by a similar mutation, a stub becomes a finger becomes a hand, through copy and paste.
We can create a new race of troglodoids, breeding them to be less fucking ugly, and just smart enough to perform menial and or dangerous tasks.
>>7808524
If I understand my genetics correctly, trisomy people are infertile/ sterile. So no.
It's perfectly possible to genetically engineer a pig to have a human uterus, human eggs and give birth to human babies, but chromosomal defects are not propagatible traits.
>>7808524
We get it, you're an edgy teenager. You can stop shitposting now.
>>7808532
Downie detected
Just to be clear, I am not a flat earther, but I would just like an explanation.
>>7808417
The sun is not directly above the clouds in this photo. The rays are also being diffracted.
2D picture of 3D space. y it look diffent??
Train tracks are parallel and yet appear to converge just like the rays.
Do you believe that Masturbation makes you less intelligent?
When I fap I seem to be less observant, with in 3-5 days of not fapping I'm back to normal.
that's the dumbest shit.
I fap at least 4 times a day and usually fap when taking a break from homework. Doesn't affect my ability to do homework/study/understand concepts in lecture at all
>>7808358
Interesting, maybe all this NoFap bs is getting to me. By the way what's your IQ?
>>7808361
there's no point in doing nofap. and i think 118 last time i took the iq-test.dk that gets posted here
Is there a scientific reason why you cannot find a one-to-one correspondence between the integers and the rational numbers no matter how hard you try?
Jew lies desu senpai.
>>7808345
Because every integer is also a rational number (except for 0)
>>7808345
You just haven't tried hard enough.
What is the probability of a small 50-100m meteor/asteroid impacting a major city on earth within the next 50 years?
How will it affect us do you think?
Approximately 0.075264647%.
It would wipe out the human race.
>>7808191
Don't be dramatic.
A 50m asteroid will at best kill millions of people.
How would /sci/ rank the top 5 greatest scientists of all time with respect to the overall impact they had on humanity?
Here's my ranking:
1) Issac Newton
2) Michael Faraday
3) James Clerk Maxwell
4) Louis Pasteur
5) Albert Einstein
1. Nikola Tesla
2. Albert Einstein
3. Isaac Newton
4. Neil deGrasse Tyson
5. Charles Darwin
1) Richard Dawkins
2) Neil Tyson
3) Jacob Barnett
4) Lubos Motl
5) Sheldon Cooper
>>7808140
Tesla? Are you serious? What the hell did he ever do?
inb4 he had spooky death rays but destroyed them for the good of mankind
Climate scientist: I have cancer and my dying wish is for you to believe in global warming
http://www.nytimes.com/2016/01/17/opinion/sunday/cancer-and-climate-change.html?_r=1
AGW skeptics: We're sorry you have cancer but that's not how science works.
http://www.breitbart.com/big-government/2016/01/18/nasa-chief-global-warming-is-real-because-i-have-cancer/
Climate change cultists: U R MOKKING DYING SCIENTIST CLIMAT E CHNAGE DENYERS!!!!!
http://nasawatch.com/archives/2016/01/desperate-clima.html
http://grist.org/article/climate-deniers-attack-nasa-scientist-dying-of-cancer/
This...
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>>7808106
Climate change is up there with being scared of DDT and secondhand smoke. It's not supported science, it's just alarmism.
who the fuck even cares about clim8 change. climate changes all the time. yesterday it was raining, now its windy and clear. see ? no problem at all.
climate changes, it's what it does. stop getting batshit scared of everything all the time cuckbird
Oh I love these threads. Lets give governments trillions of dollars in taxes which they aren't really accountable for. If you care about the environment support causes that actually produce results, I would throw money at an organization that was actively cleaning up things like the great pacific garbage patch. Carbon credits are a ponzi scheme and will never save this planet.
Why do Asians have small eyes compared to the rest of the world? What's the evolutionary reason behind no shift in their phenotype?
There was more than one human prototype but all can interbreed.
God made them that way.
>>7807870
TVs emit a lot of harmful radiation, smaller eyes let them watch anime all day without getting eye cancer. This is especially helpful with shows that are extremely carcinogenic, such as haremshit or shonenshit.
