Archived threads in /sci/ - Science & Math - 1138. page

>>8503663
that was terrible goes wrong cause i embedded wrong-anyway it was my first try-how can i delete

What the fuck?

Most people would consider basic English literacy a prerequisite for posting here.

>>8503663
>a spaceblimp is better then a spacecraft
Error: You must wait longer before posting a new thread.

how long is wait

>>8515054
Multiplying by a matrix then multiplying by it's inverse yields the original result. You're basically doing a transformation to a different coordinate system then transforming back.

>>8515061
but that would mean that all similar matrices are just the same matrix, right? That's obviously not true.

A is similar to B if there exists an S for which the following holds true

A = S^-1 B S

>>8515080
>but that would mean that all similar matrices are just the same matrix, right? That's obviously not true.
No, that would mean that all similar matrices have the same set of eigenvalues, which is true (the original image is the proof of that).

>shitskins going to all starve

We're gonna need a bigass wall to keep them back

>>8515034
>China
West is fucked

It's all bullshit anyway. Imagine how much agriculture can change by 2080 if there's any pressure to. We're just starting to get good at genetic modification and robots.

>>8514686
>ITT Things that never happened.

Also, complaining about video cleanup quality while presenting photograph of another screen...

Go to /x/ or some other containment board please. Your question is in no way scientific.

>>8514693
The question is whether even with poor quality image and my poor resources for sharing, I asked posters if they have an idea what this wired box may be on the moon in 1972. How in the hell could a wired box on the moon, recovered by NASA, not be science?

Is it a lunch box? or could it be electronics, considering the wiring, that may have something to do with science.

>>8514693
Just realized you are a geek that doesn't believe we landed on the moon, several times!
At least say if you saw anything?

File: 2.png (7KB, 810x245px) Image search: [Google]

7KB, 810x245px

This must be the result

It must work for any amount of 1s

I will bump for... 10 days, maybe?

I think with a 'Lenard Window' (small window made of thin aluminium) the cathode ray can escape the tube. Don't know it does anything to the air surrounding the aluminium though...

don't know if troll or not.

"cathode rays" are just electrons. They don't really travel very far in air, and they can't really do anything but ionize it.

>>8514587
Get an accurate scale and a CRT television (the old timey fat back ones). Post results.

>>8514548
not a very intelligent post on your part, as you do not state your current math skill level or your completed math courses
you call yourself a cs grad but then you ask how much of cs depends on math
you should be able to answer your own question

at most schools you would take calc 1-2, linear algebra, discrete math - this is the minimum
normally you would also take any calc based prob/stats course
if you have taken all this then any relevant math is covered in the cs courses

you can start with patrickjmt for discrete and this
https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-spring-2015/index.htm
https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041sc-probabilistic-systems-analysis-and-applied-probability-fall-2013
https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-046j-design-and-analysis-of-algorithms-spring-2015

>>8514600

>Outside enginerring, I have not done any math courses

>My math skill level is probably zero

but, I do have the time ahead of me to change,

>Excellent links by the way,although finished the third book(DAA) in college

you sound like a massive faggot
you will still be a basement dweller it guy because you cannot express yourself in a clear manner
these are all online

http://stanford.edu/class/ee364a/
https://www.youtube.com/view_play_list?p=3940DD956CDF0622

http://www.crypto-textbook.com/
https://www.youtube.com/playlist?list=PLMCE9xmI1IWKqYPzGxE6xoBuxIzvbFPf6

complex variables - any book will do
https://www.youtube.com/playlist?list=PLBY4G2o7DhF0TSossUvJ-CTKSLfOhQgb6

numerical linear algebra - watkins fundamentals of matrix analysis is good
https://www.youtube.com/playlist?list=PLvUvOH0OYx3AZ_WXhkLXo3JLSeGT2wLj3
https://www.youtube.com/playlist?list=PLOhS0kNLL2vZYN6cskvC8-FhhyYZoG5FU

any numerical analysis book after the above course - sauer is good

these guys have vids for eveything
https://www.youtube.com/user/nptelhrd/playlists

youtube has full playlists for pde both paper and numerical

They are cool as fuck. That's what I know.

>>8514521
>dream research
Please go on. Bumping for interest.

After I had written the theme I continued to be curious, and I kept practicing this watching myself as I went to sleep. One night, while I was having a dream, I realized I was observing myself in the dream. I had gotten all the way down into the sleep itself!

In the first part of the dream I'm on top of a train and we're approaching a tunnel. I get scared, pull myself down, and we go into the tunnel-- whoosh! I say to myself, "So you can get the feeling of fear, and you can hear the sound change when you go into the tunnel." I also noticed that I could see colors. Some people had said that you dream in black and white, but no, I was dreaming in color.

By this time I was inside one of the train cars, and I can feel the train lurching about. I say to myself, "So you can get kinesthetic feelings in a dream." I walk with some difficulty down to the end of the car, and I see a big window, like a store window. Behind it there are-not mannequins, but three live girls in bathing suits, and they look pretty good!

I continue walking into the next car, hanging onto the straps overhead as I go, when I say to myself, "Hey! It would be interesting to get excited-- sexually--so I think I'll go back into the other car." I discovered that I could turn around, and walk back through the t rain--I could control the direction of my dream. I get back to the car with the special window, and I see three old guys playing violins--but they turned back into girls! So I could modify the direction of my dream, but not perfectly.

Well, I began to get excited, intellectually as well as sexually, saying things like, "Wow! It's working!" and I woke up.

I made some other observations while dreaming. Apart from always asking myself, "Am I really dreaming in color?" I wondered, "How accurately do you see something?"

Ye

>>8514426
Lrn2meme, trollfag pls

>>8514426
No, you get 2 degrees for the price of 1.

>>8514339
arctan(y/x)

>>8514349
Neat, thanks.

Hol up.

What if x = 0? This equation also is unspecific to whether x is positive or negative. The result has an interval of (-90, 90) and instead should have an interval of [0, 360) like it's a unit circle.

Help me out guys. I feel like I'm overlooking something really simple.

There's gotta be at least one person on /sci/ right now that knows combinatorics.

>>8514290
lol no were too busy shitposting

>>8514118
Isn't it just another way of saying there is a god in a way scientists will agree with you

Is god the computer, the guy who made the computer, or both?

How crappy is the future if we live in a simulation of the past?

Richard Muller is a faggot. He's one of the many reasons I quit Quora.

>>8514081
He can be annoying at times but I like his writing.

>>8514075
Pop-Sci tops out at Road to Reality, see you on the other side

Just do extra problems in the book. Math skills are like a muscle. You gotta practice.

I'm sorry you're in this pickle. I'm not a math expert and I'm only here to learn and see what I can find as well. My only reccomendation is going to the biggest book store in your area (or at least preffered) and find some science and math books. I know on vacation I found a "Books a Million" store with all sorts of cheap science and math books all under 20 bucks a piece. I know this price kicks the shit outta college mandated, although I can't confirm any of that would have what you're looking for. I'd say the best way to understand the math is practice problems. Tweak equations, test the math's limits, take into account contradictory evidence, repeat until satisfied. Best I can offer since tutors who give a fuck aren't around.

>>8514057
1) Practice more.
2) Focus on understanding stuff instead of memorizing how to do particular textbook problems.
3) Practice more.

Math is an abstract notation system anyway

>>8514015

lol nigga did you expect to even get to masters level math, you fuckin pleb kill yourself you probably are only in calc 2

>>8514022
Most of science is.