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Archived threads in /sci/ - Science & Math - 1695. page

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why can't we just scan each atom of the human body and log the scanned atoms as unique bit patterns and then send the bit patterns over the internet and then at the receiving end use the bit patterns to move matter in a way so that it corresponds to the original human body?
27 posts and 3 images submitted.
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Because you are stupid
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>>8056303
That's not teleportation, that's cloning. You would still die.
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>>8056303
>just scan
>to move matter
Those.

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What is the fastest way to calculate the harmonic sum of a number /sci/?

[math]
\sum_{k=1}^{10000000000} (\frac{1}{k})
[/math]

in python or c++

WolframAlpha does it so fast yet my c++ program takes ages
26 posts and 4 images submitted.
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>>8056273
Hnnng
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>>8056273
This whole "lol I lift =P" meme needs to fucking die. Attractive bodies are literally all genetics. You either store muscle and fat in aesthetic places or don't and going to the gym is not going to change that. Go to any cbt on /fit/ and you will see dudes who have unattractive muscle insertions and lifting just made them look fucking stupid.

Take this very girl for example. Her ass and legs aren't shaped any better than average even though 99.9% of women her age cannot squat 135 lbs with that quality form.

But I guess normies require their illusion of control and for her it's more about having her shitty "this ass was made IN THE GYM!!" attitude so she feels like she actually earned something when literally any guy currently giving her attention would also give her attention if she never squatted more than a 5 lb dumbbell like a retard.
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>>8056273
~9*ln(10) + gamma_euler = 21.3005

use Hn = ln(n) + gamma + sth negligible

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Imagine Discovering That Your Teaching Assistant Really Is a Robot
http://www.wsj.com/articles/if-your-teacher-sounds-like-a-robot-you-might-be-on-to-something-1462546621

I've got bad news for you guys.
AI is NOT just going for the stupid jobs. It's heading straight for the PhD's jugular.

Let's read a bit about Jill Watson
>Since January, “Jill,” as she was known to the artificial-intelligence class, had been helping graduate students design programs that allow computers to solve certain problems, like choosing an image to complete a logical sequence.
>“She was the person - well, the teaching assistant - who would remind us of due dates and post questions in the middle of the week to spark conversations,” said student Jennifer Gavin.
>“It seemed very much like a normal conversation with a human being,” Ms. Gavin said.
>another student, ascribed human attributes to the TA - imagining her as a friendly Caucasian 20-something on her way to a Ph.D.
>“Just when I wanted to nominate Jill Watson as an outstanding TA,” said Petr Bela.

>Don’t confuse Ms. Watson with the customer-service chatbots used online by airlines and other industries. Mr. Goel boasts that she answers only if she has a confidence rate of at least 97%.
11 posts and 1 images submitted.
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>>8056207
Why is this bad news? It's being trained to answer routine questions by looking at a dataset of questions that have been asked and answered correctly in the past. If anything this will help streamline education by removing all of that shitty redundancy bogging us down.

Also, lol at that retard who thinks we should have full disclosure about what you're talking to. Why does it fucking even matter. I think a good principle is:
>On the internet no one knows you're a dog.
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>>8056278
I think the main concern is that a lot of PhD students need this supplementary income to keep them going. If the typical TA team was 9 to start with it might now be accomplished by 3 who get the same pay as before leaving most PhD students with no fall back option.

>Also, lol at that retard who thinks we should have full disclosure about what you're talking to. Why does it fucking even matter. I think a good principle is:

He probably expects you and I to know each other's names before we start conversing.
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>>8056318
>names
>nationality
>gender
>sex
>skin color
>ancestry
>...

Where does it stop?!

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http://www.nature.com/news/fat-lot-of-good-1.19845
>We have always been proud of our large brains. Indeed a century or so ago, men of science (and they usually were all men) would routinely measure human heads and weigh their brainy contents to prove our dominance over the beasts. (They did this as well as making false claims on the primacy of certain human groups over others.)

It's okay to compare humans to animals, but comparing humans to other humans is wrong? I don't get it. Please explain.
19 posts and 5 images submitted.
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Because it means you hate blacks
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http://www.sciencevsfeminism.com/the-myth-of-equality/sex-differences-general-intelligence/
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>>8056135
>Behold my enormous head.
>It means I'm better than you.
>I could have lots of PhDs in any field I want.
>I just don't because I would rather spend my time telling people to look at the size of my head.
>That's how much better than you I am.
Top zoz

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You guys are way smarter than me at this.
12 posts and 2 images submitted.
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but it is science
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Fags who think they're cool just because they study "real" science. Science is science.
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chemistry and physics are the real sciences

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Can this reverse the effects of global warming?
16 posts and 3 images submitted.
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>>8055815
Paint all roads and roofs white. That will slow it down quite a bit.
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>>8055821
We'll need to set of mirrors on the oceans as well.
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>>8055815
People have thought of his. It really isn't that great of an idea. It's not fixing the main issue with global warming : greenhouse gases. Also if you take a fuck load of mirrors and throw them into space how the fuck will plants grow?

One of the best ways to combat climate change is to take excess CO2 and react it with basalt. The problem is that right now it's too expensive to do and no one really has a good idea of how to excessive atmospheric CO2 and pump it into the earth.

I'm sure if someone figured it out they'd be a fucking billionaire over night.

NASA is building a fusion rocket, will get to Mars in 30 days launched atop SLS.

For patricians:
>https://www.nasa.gov/directorates/spacetech/niac/2012_phaseII_fellows_slough.html

For plebs:
>http://www.dailymail.co.uk/sciencetech/article-2612923/Could-travel-Mars-30-DAYS-Nasa-believes-nuclear-powered-rockets-make-trip-faster-cheaper.html

SpaceX BTFO
12 posts and 1 images submitted.
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>>8055610
2014?

any updates?
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>>8055610
Fusion doesn't even work on earth.

These paper missions will be just that for the next 50 years, paper missions.
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>>8055652
What the fuck did you say about me, you little bitch? [...] You're fucking dead, kiddo.

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I have always been shitty at math, but have recently chosen to go into science. This requires mastery of calculus. I am currently in a geometry class that I will pass comfortably. My issue is that I want to take an Algebra 2 course, but I can't because I took the course in 2008. I forgot literally everything except how imaginary numbers work (don't ask why that stuck out). The college will not let me retake it even though I submitted a request citing my forgetting everything, claiming that I have "no legitimate reason." It will only allow me to take Trigonometry. Is it possible to take Trig without taking Algebra 2? Is it wise? I asked a friend who's a math guy and he told me that most of Algebra 2 isn't used in Trig, and most of it is gone over in Precalc, so I wouldn't need to take the class anyway, but I want other opinions.

Pic unrelated
12 posts and 1 images submitted.
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>>8055556
underage bait
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>>8055564
I am in college. I just ignored math as a kid and I'm trying to correct that. Many adults cannot do any real math.
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>>8055556
>The college will not let me retake it even though I submitted a request citing my forgetting everything, claiming that I have "no legitimate reason."
What stops you from just showing up for the lectures, and to hell with anything exam-ish?

>Is it wise?
Not really. You can do a quick refresher course though.

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[math]

\frac{\partial^2 f}{\partial x^2}=\frac{\partial^2 f}{\partial t^2} + (a+bt)f

[/math]

What is a non-trivial solution to this equation.
11 posts and 1 images submitted.
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>>8055423
I already answered almost the same question in another thread.
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>>8055443
link?
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>>8055423
fxx=ftt+(a+bt)f
Let f(x,t)=X(x)*T(t)
X''/X=T''/T+(a+bt)=constant

solve the ODEs

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How can science be objective if our reality is subjective?
40 posts and 6 images submitted.
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Jaden go back to bed.
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>>8055400

Double dubs.

Reality is constructed in our brains. Science is essentially exploiting our senses which were strictly developed to help the propagation of information (DNA) through time.
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>>8055416
No, you have it completely backwards. Reality is objective. Our conceptions of it are, by definition, subjective. Science is the constant attempt to make our subjective conceptions of the reality more objective and accurate. There is only one reality and subjectivity is simply the necessary effect of being singular parts of that reality with specific vantage points.

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Starting with the release of Oliver Stone's Snowden, I think a significant amount of people will respond pretty terribly to the idea of being recorded constantly. It'll drive a lot of otherwise healthy people mentally unstable and reclusive, let alone anyone suffering from depression, anxiety, obsessions, compulsions etc etc

At some point no amount over government lies will hide the fact that everyone is being monitored by them and hackers. And the degree to which they will have access will only increase exponentially with technology.

I cannot imagine how much worse AI will make this.

Am I blowing things out of proportion? Am I totally off even?
18 posts and 3 images submitted.
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>>8055396
I felt this topic appropriate for the board given that a good discussion of it requires some understanding of mental health, surveillance technology, and maybe AI.
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>>8055401
Snowden was a terrorist, but so was Bush, so idk.
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>>8055396
>tfw the NSA pays someone to read our shitposts

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Which human language is best to learn for mathematics (after English ofc)?
16 posts and 2 images submitted.
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>>8055354
Chinese
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>>8055354
Why would you learn any language besides English if you want to do research mathematics? Everyone else around the globe learns English to communicate their mathematical ideas, not the other way around. See: Perelman, Mochizuki, and of course every other professional modern mathematician (I just noted those 2 because most people on /sci/ will recognize their names immediately).
>>
Why would you need to learn a language for mathematics?

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Sup /sci/, Math major (Applied Math/Statistics concentration) here.

Why is Pure Math so glorified here? It's honestly the least marketable thing you can do with mathematics amongst all the majors that require a decent amount of mathematics.

I get that it's interesting (I take interest in it as well). However, the only thing people do with it is teach retarded engineering majors at shitty universities how to take derivatives.

So why are you majoring in (pure) math, and what do you plan to do with it after you graduate?
40 posts and 3 images submitted.
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>>8055320
Isn't that an american only thing? My degree's title is only 'Mathematics'.

How can you even specialize in applied or pure in fucking undergrad?

I think it is a bit dumb.
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>>8055320
Because you should study what interests you, not just to get a job.
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>>8055320
>the only thing people do with it is teach dick sucking engineering majors how to take derivatives.
Is that an 'murican thing? Sure, most of those people in europoor teach aswell, but their main focus is on their own studies.

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What are the essential numerical methods?
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>>8055280
Adding and multiplying.
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>>8055280
For what? Integration? 1d or 2d? Matrix inversion? Stochastic diff eq?
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>>8055303
you forgot dividing

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Hey /sci/.

I'm trying to cultivate a fungus, but every time I start a crop another fungus always invades and kills my culture. Temperature and humidity control doesn't seem the problem - I've got a fairly rigorous setup that I check very frequently and sterilize thoroughly, so I'm thinking maybe the grain I'm using is contaminated? I kind of went the cheap route and used bird seed, so is there either a way to purify the bird seed before introducing the culture, or should I go with a different kind of grain? Recommendations?
13 posts and 1 images submitted.
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>>8055132
Boil it in a pressure cooker. Then inocculate it with your fungi. and keep in an environment without airflow that brings in environmental spores.

tl;dr google how to grow magic mushrooms properly, the guides are out there to avoid having your shrooms infected by the environment.
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make a home autoclave in a pressure cooker?

dry roast the bird seed?

buy lab grade food source for the fungi as bird seed is definitely super contaminated
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>>8055153
I'll admit, I can't actually find a lab grade supply of grain on any common online retailer. Is there a specific site for it?

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