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Why don't knives work underwater?
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Density.
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the density of the water mass is too great
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>>8935554
they do
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/Sci/ needs a good geometry thread. So discuss all things geometry.
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>>8935261
So I want to show that the set of directed line segments forms a vector space, but I'm not sure how to show that the scaling transform(is that the right word?) forms a field.
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Anybody seen Vaughan Pratt's algebraicization of Euclid's axioms? It's a big conceptual advance IMO. Did he publish a real paper on it yet?
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>>8936371
how does your addition work ?
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>get billions of dollars a year in research funding
>only come up with chemotheraphy, which literally kills you
can someone explain why chem/bio fags are so unintelligent?
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Because if they cured cancer they wouldn't receive billions of dollars a year.
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>>8935254
the one who does would though
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>>8935249
Cancer cells are human cells. Trying to kill them without harming other human cells is borderline impossible
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Who /agentbasedmodeling/ here?
>What is an agent based model?
https://en.wikipedia.org/wiki/Agent-based_model
>An agent-based model (ABM) is one of a class of computational models for simulating the actions and interactions of autonomous agents (both individual or collective entities such as organizations or groups) with a view to assessing their effects on the system as a whole. It combines elements of game theory, complex systems, emergence, computational sociology, multi-agent systems, and evolutionary programming. Monte Carlo methods are used to introduce randomness. Particularly within ecology, ABMs are also called individual-based models (IBMs),[1] and individuals within IBMs may be simpler than fully autonomous agents within ABMs.
http://www.mcs.anl.gov/~leyffer/listn/slides-06/MacalNorth.pdf
What is your favorite tool for ABM? What are you working on now?
pic related
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I think ABMs are fun. I've done simple crowd simulation and some other minor university homeworks. What tools for ABMs are there?
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>>8935558
The one i'm most familiar with is NetLogo
Very easy to learn and very versatile. You can download it for free too
https://ccl.northwestern.edu/netlogo/
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what are you working on now?
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What's the demographic for this board?
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>>8934987
there you go
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>>8934987
I'd assume it's pretty much exclusively young males, like most of 4chan.
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>>8934987
>What's the demographic for this board?
99% high school students looking for answers to their homework.
0.9% University students who are complete brainlets. (I am here)
0.1% """""""""""""""""""""""females""""""""""""""""""""""""
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Hey /sci/
Can you help a brainlet out with a math problem? It isn't calculus or something simple. Actually, I really don't know what subject of math it falls into but let me try to explain.
Say we have a grid who's dimensions are 10 by "A", where "A" is any arbitrary integer greater than 2 ( in this case A = 9 ) and where the columns are labeled 0-9 ( I have only labeled only 0-7 because of lack of dots ). Each row is 1 unit apart and each column is also 1 unit apart.
Lets also say we have some random sequence of integers of length "n".
In the gif example the sequence is { 1, 2, 7, 3, 4, 0 } thus n = 6.
Now, lets start at the first row in the column denoted by the value of the first term, in this case we start at the first row and column 1. Next lets connect this term to the following term in the row below. That is we connect to the second row and column 2. And we continue this pattern in a cyclical manner. Other words we connect the last term to the first term. And if we run out of rows we connect to the first row again in the appropriate column ( like the red line).
Mathematically,
(1,1) -> (2,2) -> (3,7) -> (4,3) -> (5,4) -> (6,0) -> (7,1) - > (8,2) etc.
> pic related
Also stupid question thread
84 Posts / 13 Images
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That is not a question.
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>>8934168
sorry, it got too long. i'm typing the rest
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>>8934168
>>8934173
Each line connecting each point has a diagonal length that can easily be found using the difference between the sequence terms connected and the pythagorean theorem.
But my question is, if we consider anything connected back to the first row to be of negative length and anything else to be positive length, and we use the digits of pi as our sequence for any arbitrary "A", will the final sum fluctuate around a certain value?
I don't want to use converge, but I've been dabbeling with this for a bit and that's the best way I can put it in words.
I know pi is irrational, and doesnt have a pattern within it's decimal values but is there a way to prove that this some doesnt "converge" to anything?
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Why didn't Carlos Chagas won a medicine noble prize, /sci/?
Where his achievements and discoveries not that impressive or was it because he was Brazilian?
Are all the science nobel prizes also a joke, or only the peace and literature prizes?
Tell me, /sci/
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((()))
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Well, maybe he wasn't jewish enough.
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because medicine is just memorization
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You should be able to solve this.
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>>8932504
>inb4 it's not 64
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Obviously they're all square numbers and the sequence of numbers squared is 1, 2, 3, 4, 7. I can't tell you why they skipped 5 and 6, so I can't tell what comes next.
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169
>Take game theory course on Coursera
>Absolutely nothing about video game design
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/u/8931333
Have some 4chan gold lol
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>study class field theory
>professor never takes us out on class field trips
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>>8931333
Not entirely true desu
Anonymous
Are you team Enceladus or team Europa 2017-05-23 05:24:18 Post No.8930742
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Are you team Enceladus or team Europa 2017-05-23 05:24:18 Post No.8930742
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Are you team Enceladus or team Europa
Anonymous
2017-05-23 05:24:18
Post No. 8930742
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85 Posts / 18 Images
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europa master race
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Europa or nothing
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Europa, boyos
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Where is everyone, /sci/?
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They're all hanging out at KIC8462852 apparently. We're rapidly reaching the point where "it's aliens" is the last hypothesis standing.
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Maybe we're late to the party.
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>>8929402
They realized that this universe was doomed because lossless transfer doesn't work (meaning they'd need to spend too much time fucking around with physics to avoid Heat Death) and fucked off to a universe that better suited them.
Anonymous
Why do White people have pale skin? 2017-05-22 06:43:18 Post No.8927908
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Why do White people have pale skin? 2017-05-22 06:43:18 Post No.8927908
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Why do White people have pale skin?
Anonymous
2017-05-22 06:43:18
Post No. 8927908
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According to American Association of Physical Anthropologists, it is a recent development and over 8000 years ago Europeans did not have pale skin.
I read that light skin was selected to maximize vitamin D synthesis but doesn't explain why Eskimo don't have pale skin.
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>>8927908
eskimos were probably always bundled up to keep from freezing and so there was no way for their skin color to effect vitamin D meaningfully, they probably just ate seal livers or something
i dont really know
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They might have been getting their Vitamin D from some other source.
It's also important to remember that just because a trait would prove very valuable for some environment doesn't mean that trait will ever show up.
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>>8927953
I've read that before and supposedly Eskimos had a fish heavy diet which is rich in Vitamin D but Scandinavians also have a fishy heavy diet.
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ITT: jargon that only makes sense in your field
I'll start.
>High five display a strong ping-pong fingerprint
>The quick action of sonic hedgehog is essential for development
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>Assume
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>clearly
>obviously
and all other synonyms thereof
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>>8938334
Gneiss cleavage
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Exactly what is so hard about getting a PhD? You generally don't even come up with an original idea, you get one from your advisor. Then, with guidance from this expert with decades of experience, you develop and carry out an experiment to test it and write and submit a paper. Even if you don't prove the hypothesis, the results are valuable because you proved it wasn't what you thought.
I'm just an undergrad, but please enlighten me. How could someone possible fuck this up?
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Its surprisingly easy to fuck up, otherwise attrition rates wouldn't be so high
Also PhD is tricky because you have an 80% chance to go into industry, and specific parts of industry because you are overqualified for entry level shit.
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>>8937936
it's difficult to force yourself to waste the last of your youth that way
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>>8937936
Just take a grad course and find out. If you didn't transfer with any credits, you could still take them relatively early as an undergrad.
I don't want a PhD or even a master's desu. I fucking hate college.
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Does anyone know how freezing affects the woolly bear caterpillar's brain? I.e. what happens to its consciousness; does a new consciousness occur when it unfreezes? If consciousness is only the electrical processes which go on in the brain, and if brain activity ceases when the caterpillar is frozen, then wouldn't its consciousness start all over again? Would it still have its past memories? Or at least any awareness of its life before being frozen?
For those of you who don't know what I'm talking about, the woolly bear caterpillar literally freezes to death over the winter and reanimates once temperature rises again. It doesn't sustain damage to its cells to to an antifreeze it produces.
I'm asking this because I started to wonder if humans would come back with the same consciousness and memories if they were cryogenically frozen. I guess this is more of a philosophical question, but I believe the woolly bear caterpillar may yield some answers.
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>>8937901
welcome to consciousness 101.
Don't worry, when you'll hit puberty in a couple of years you'll get over it and start thinking about other more mundane things.
P.S. tonight when you go to sleep you will die and tomorrow someone else with your memories will wake up. Another consciousness so to speak.
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>>8937901
It's still the same animal and still has the same memories.
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>>8937901
Do you even know how brains work? Memories have very little to do with consciousness, and much more with the brain.