Archived threads in /sci/ - Science & Math - 482. page
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How hot is your favorite scientist, /sci/?
Hmm...
>>7770843
>liberals will say he's not a scientist
I'm insulted, frankly.
Is coffee a method of societal control? How can it be so universally praised by the media when it affects sleep?
What is your opinion on the health effects?
No, its currently a cheap and relatively healthy caffeine vehicle with lots of historical acclaim.
Hell, when Coffee and Tobacco came to Europe, Europe soon after began the enlightenment and the industrial revolution.
Coffee is great and probably caused the enlightenment. Your sleep patterns are meaningless.
>>7770758
please explain how coffee "controls" society. As you suggested
How high does your IQ have to be to solve a petaminx?
You could teach a 5 year old the algorithms behind it.
He would most likely need a cheat sheet but he could do it.
>>7770762
I mean actually deriving the algorithms yourself.
There's not much puzzle solving done when you're just given a walkthrough, right?
>>7770782
Do you mean "deriving the algorithms" on the fly or implementing the algorithms on the fly? Because on is possible but not the other. One is also dependent on the other. One takes hours, perhaps hundreds of hours for a noob while the other would take minutes, perhaps even seconds but most likely minutes.
So, I just sat on my balcony for a while and watched the nightsky because it's so really clear right now.
I noticed some groups of stars shaking really fast. It didn't seem completely chaotic but I guess I can't really talk of a pattern. It seemed like some even 'rotated'.
I can't imagine the earth spinning so uneven that I notice it by looking at the sky.
What phenomenon could this be? I think it's something from the Earth because the group of stars was pretty far away, judging by their light intensity. The thing that...
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OP here, pic related.
>>7770731
It's our atmosphere moving around causing a lensing effect, like looking up through the bottom of a pool.
>Demaine studied at Dalhousie University in Canada, completed his bachelor's degree at 14 years old, and completed his PhD at University of Waterloo when he was 20 years old.
>Demaine's PhD dissertation, a seminal work in the field of computational origami, was completed at the University of Waterloo.[6] This work was awarded the Canadian Governor General's Gold Medal from the University of Waterloo and the NSERC Doctoral Prize (2003) for the best PhD thesis and research in Canada (one of four awards).
JUST...
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>>7770714
>computational origami
> best PhD thesis and research in Canada
Why are Canadians so pathetic?
>Kripke was labelled a prodigy, having taught himself Ancient Hebrew by the age of six, read the complete works of Shakespeare by nine, and mastered the works of Descartes and complex mathematical problems before finishing elementary school.[4][5] He wrote his first completeness theorem in modal logic at the age of 17, and had it published a year later. After graduating from high school in 1958, Kripke attended Harvard University and graduated summa cum laude obtaining a bachelor's degree in mathematics. During his sophomore year at Harvard, Kripke...
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>>7770714
>computational origami
Can I get the hardest integrals you have to study calc 1?
>>7770659
[math] \int\limits_\mathbb{R} {{e^{ - {x^2}}}dx} [/math]
>>7770664
Note that this (and many other integrals) can be determined using dimensional analysis. I recommend the book "Street Fighting Mathematics" (its free google it) for that and many more useful techniques.
>>7770659
[math]\int{ \frac {(1+x^2)dx} { (1-x^2) \sqrt {1+x^4 }}}[/math]
Not an easy integral.
>mfw the average engineering student can't use a hammer and nails
>>7770582
>average math student can't do basic calculations without using calculators.
>tfw Mechanical Engineer
>tfw repaired 150 sq.ft of my roof's plywood sheathing by myself
>tfw hammer and nails was the easy part, using a jigsaw while leaning over the eaves to cut out support beams was the tough part
>>7770582
>Be Chemical Engineer.
>Did a general technician course over the holidays when I was young because muh Renaissance man meme.
>First interview "Why did you put these practical skills on the CV you sent us Anon?"
>...
I don't fully understand imaginary time, what does he mean by this and why are there no singularities in imaginary time?
pic related
When we do a wick rotation, i.e. using an imaginary time coordinate [math] {t_E} = it [/math], the path integral we use to describe a theory will become a euclidean path integral. [math] \int {\mathcal{D}\varphi {e^{iS\left[ \varphi \right]}}} \to \int {\mathcal{D}\varphi } {e^{ - {S_E}\left[ \varphi \right]}} [/math]
This allows to equate a QFT with a quantum statistical mechanics theory as the path integral takes the form of a partition function. The euclidean path integrals tend to me easier to evaluate and diverge less.
Well, consider how we view the universe.
We see a three-dimensional world with one dimension of time, seeming to move unilaterally from start to finish.
In order for Hawking to be able to imply that the universe had no beginning or end, he simply suggested that maybe TIME has an additional dimension orthogonal to the time we perceive.
If time is shaped how we think it is, then imaginary time, according to Hawking, would be spherically-shaped. This implies that the universe has neither beginning, nor end.
>>7770642
this response is complete garbage
What would microbes write if they had twitter?
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>>7770472
MDYHKILTAGLSVQQGIVRQRVIPVYQVNNLEEICQLIIQAFEAGVDFQESADSFLLMLCLHHAYQGDYKLFLSGAVKYLDYHKILTAGLTVQQGIVRQKIISVYLVDNLEAMCQLVIQAFEAGIDFQENADSFLLMLC
What does /sci/ think of r/science?
Topics that are actually about science that get answered correctly without anyone getting called a faggot or diverting into far right political rants. Boring.
>>7770481
There's a smugness and fake sincerity pervading the whole place. At least here people are honest about being egotistical cunts that need to constantly categorise people in categories of superior and inferior, of which they themselves are in the former, during every moment of every day.
>>7770456
>Implying I've ever visited a subreddit in my 18+ years of browsing the internet.
Not about to start now, faggot.
>always read one chapter ahead of the course in the textbook + do research on the internet if I dont get it
>everyone thinks im really smart because I "pick up things so fast in class"
>mfw im a fraud and nobody realises how stupid i really am
>intelligence is a purely genetic factor
You become an intelligent person by doing intelligent actions, staying ahead of the class is such an action.
>>7770386
Sure, but when I leave universityy i wont just be able to Google my way out of problems, and then my crutch will be ripped out from under me and I shall fail
>>7770399
>i wont just be able to Google my way out of problems
Actually, you'd be amazed how often you can do just that.
My understanding of clear materials is that they allow all lower photon energies to pass through due to the energy gap.
This makes sense for UV proof glass, it blocks higher energy photons.
What I dont understand is how a material can only let a certain range of photons through, like most of the visible range but no infrared, because that means its blocking a lower energy level and allowing a higher energy level which doesnt make sense to me if the energy gap between electrons is what causes transparency.
Thanks.
Pic related because it was probably taken...
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>>7770289
pls respond
She's hot
I want to know the answer.
Has anyone else ever done this?
I recently found some really useful lecture notes online that I wanted to have a physical copy of, but they were too long to print out. So I had a book made and it was quite cheap.
pic related
>>7770256
On our university campus there's a shop that does all sorts of printing and binding. I've had them print tons of lecture notes for me.
I find it easier to read lecture notes than a proper textbook because lecture notes are written more formally (instead of flowery English prose) and they seem to explain intuition better.
>>7770256
How is this blogshit thread worthy?
>>7770256
How is this not a textbook? It's not condensed much at all.
The whole point of notes is to leave out all the filler in textbooks and get straight to the point.
How do you study, /sci/? I,
1.Write all of the definitions in a chapter.
2.Write a checklist of what I'm going to do that study session
3.Skim the chapter quickly and then try to condense it into three or four pages.
4.Finally, once I think I know the material well enough, I do the questions in the book and some exam questions.
Is there anything you do that you think is better than that?
How do you study?
>>7770253
HELP
I CAN'T FOCUS ANYMORE
I rewrite and rewrite and rewrite
>>7770465
How do you organise that? Do you throw out the old stuff and begin a new page?
Why do fractions exist at all.. It seems pointless and confusing.
It's much easier for me to think of 1/12 as just 0.1 in a 12 digit notation.
multiply 1/12 by 4/12.. ok 0.1 x 0.4 in 12 digit notation.
no need for learning stupid tricks like multiplying by the reciprocal etc that just avoid explaining the actual concept.
Am I missing something / am I autistic?
it can even be scaled up to more complex problems as long as you remember that you're in x notation and convert back to decimal notation at the end. Am I wrong?
>>7770149
Please do not post on this board again
>>7770149
So you are implying that is also easier for you to think of 0.5 as 0.1 in 5 digit notation?
So If you have say,
0.57371 that is 0.1 is 57371 digit notation?
I think you are autistic? Are you implying that every fraction we do should instead with replaced 0.1 and a explanation for what the base is?
That is fucking autistic. Working in a single base is better and easier to learn and to work with.
