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/sci/ - Science, Technology, Engineering, and Mathematics

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Anonymous 17/08/28(Mon)20:04 No. 16539 ID: 269c1e [Reply]
16539

File 150394348278.jpg - (28.69KB , 400x300 , bad-math-fotolia-29084487.jpg )

I'm hoping to return to college and do a second degree in math/a math related subject (ideally Computer Science). Unfortunately, I haven't done math in well over a decade, and when I did math previously it wasn't exactly the highest level math.

Can anyone recommend how I can best learn/re-learn/catch up to college level math and be ready and prepared?


11 posts and 3 images omitted. Click Reply to view.
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Anonymous 18/01/22(Mon)00:19 No. 16617 ID: 7332e9

>>16613
If he’s catching up to college level stuff he has to do highschool math first, best starting with analytic geometry ending somewhere in calculus I or II.
Arithmatic mastery will make the difference between doing well on a timed test, and the discipline from mastering arithmatic when used to master secondary school math concepts will make the difference between getting 80s n 90s vs getting 100s.


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Anonymous 18/01/22(Mon)10:08 No. 16618 ID: 2a858b

>>16617
>the discipline from mastering arithmatic when used to master secondary school math concepts
So please explain how arithmetic helps you solve quadratic equations, or systems of linear equations.
Like, if I need to find the exact roots of f(x) = -sqrt(pi) * x^2 + e*x + 10, how does it help me to know how run a multiplication algorithm by hand?


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Anonymous 18/02/09(Fri)23:58 No. 16622 ID: bee93c

>>16540
which one




start learning about computers Bigattao 16/03/10(Thu)06:19 No. 16297 ID: 00af9a [Reply]
16297

File 14575871945.jpg - (186.25KB , 860x450 , Engenharia_de_Computacao-BLOG-860x450_c.jpg )

Hi sci,
I'm a noob about computers and going to do college of Computer Engineering. I don't know even how to start learning. Can somebody give a tip?


11 posts and 2 images omitted. Click Reply to view.
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Nooby Anon 17/01/07(Sat)07:51 No. 16408 ID: 122f98

Also use Udemy if you have a little bit of money their courses are very informative and useful. Also very good for Python beginner courses.

Good luck bro


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Anonymous 18/02/01(Thu)04:53 No. 16621 ID: fcbe0a

>>16404
how good is cybrary? been told it's a meme and not too good


>>
Anonymous 18/09/24(Mon)08:25 No. 16696 ID: 3a84e2

>>16621
Cybrary is a big meme

t. edgy hacker

Jokes besides though personally I wouldn't recommend it.
You could look into hacking ctf's tbh anon.
Look into pwnable.kr or pwnable.tw :).
Also search for "ctf" and "liveoverflow", I'm confident you'll learn a lot from him.




Earth Hole Anonymous 17/01/05(Thu)16:26 No. 16406 ID: 4318e8 [Reply]
16406

File 148362999864.jpg - (6.12KB , 300x174 , hjjfokjfklerajogfiaejrgfaer.jpg )

Hello /sci/. If there was a giant hole in the earth leading from one end to the other and- if you jumped in- would you just be pulled to the other side, or just be trapped in the middle by gravity?
>Pic unrelated


4 posts omitted. Click Reply to view.
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Anonymous 17/07/18(Tue)15:21 No. 16528 ID: 9eed6d
16528

File 150038406684.jpg - (583.52KB , 8525x4795 , renakinblue - Copy.jpg )

You would bounce a view times around the center just like in that star wars spoof scene- like a jojo or what that crap is called...


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Anonymous 17/11/10(Fri)21:43 No. 16576 ID: ea535a

you would be trapped like a spring


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Anonymous 18/01/12(Fri)09:30 No. 16612 ID: 42dc73

>people still doesn't know how gravity doesn't work

If there was a hole like that then the planet would just merge back into a ball because o gravity. Let's say it doesn't then it means the whole planet somehow lost a lot of mass which means that the planet is going to fall to you because your gravity pulls it to you.




Difference between instruments playing the same note Anonymous 17/11/30(Thu)16:21 No. 16585 ID: 864454 [Reply]
16585

File 15120552626.jpg - (85.73KB , 1180x613 , rd-2000_hero.jpg )

At the same pitch? I'm trying to create a piece of music from an advert since I cannot seem to pay anyone enough to recreate it as they fear copyright backlash as a piece of production music.

The original track uses several synthetic guitars

https://www.youtube.com/watch?v=_T3skSSt1xU

https://www.youtube.com/watch?v=5mqqj0yfiWM


This is my reasonable attempt :
https://vocaroo.com/i/s1epL4Ex3kBz


I'm an expert at the piano but unfortunately don't really know much about guitars and that's why despite me playing the same notes at the same pitch, it sounds almost entirely different.

Message too long. Click here to view the full text.


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Anonymous 17/11/30(Thu)17:03 No. 16586 ID: f9cb15

It's not possible to explain it in analogy to sine waves, because instruments are not sine wave generators. If instruments were capable of producing perfect sine waves at consistent phases, frequencies, and amplitudes then yes, they would all sound the same.

Comparing an electric guitar to a piano:
1. Plucking a string causes it to vibrate differently vs. striking it. For a given pitch, this generates differently shaped "main waves", which itself gives the sound different harmonics. Compare the sound of a piano to that of a harpsichord. The harpsichord has more harmonics.
2. The guitar doesn't have a resonance chamber, nor do its strings vibrate the air directly. Instead it uses electromagnets to measure the distance of a piece of metal several thousand times per second. Because the strings vibrate perpendicularly to the pickups, this adds a non-linear distortion to the wave, which adds harmonics.
3. Certain maneuvers are possible in a guitar but impossible in a piano. For example, a piano is not capable of doing a proper glissando, because it can only produce notes at discrete ranges. A guitar is also able to do tremolo, which I think it's impossible with a piano.
4. Finally, different mechanisms of producing sound cause the attack, decay, sustain, and release phases to have different lengths, which also affects the "feel" of the sound.


>>
Anonymous 17/12/01(Fri)09:22 No. 16593 ID: 0c2267

i think some of your later notes are off
also it will sound slightly different if it's in the context of a chord or if there are other parts playing
i think i phrased that wrong
a phrase will sound different in terms of "mood" or "tone" (not tone as in timbre, etc) if it has accompanying notes
i think i phrased that wrong again
whatever
Also yes the timbre of an instrument and the harmonics/partials will effect how it is perceived
but
it probably shouldn't be so different that it sounds so wrong
try a different register, play higher
check your notes again




Request: Post HD images of technology Anonymous 17/10/08(Sun)00:10 No. 16561 ID: 864454 [Reply]
16561

File 150741422126.jpg - (105.64KB , 640x966 , OracleExadataExalogic.jpg )

Hey guys, I recently started a computer science class in college and my networking teacher who is the head of the IT department wants us to impress him with the best personalization of our desktops.

> inb4 impress him with your computer programming skills as opposed to flashy images

No anons, No. The motto that he always repeats is that it's important to be "all rounded". He's seen lots of autist computer geeks who are geniuses at what they do but are pretty much mediocre/shit at nearly everything else in their life (social skills, organisation of themselves, writing CV's).

I would like to show off images that highlight an interest in tech along with high quality photography; so if I may ask you kindly to post your favorite images

> I would to the other chan but those fags banned me since June of this year and my shitty ISP hasn't renewed my "dynamic" I.P. address for 4 months.


4 posts and 2 images omitted. Click Reply to view.
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Anonymous 17/10/27(Fri)02:12 No. 16569 ID: 43ed39

>>16568
A modern computer is an adult's toy. It is a gateway to entertainment. If the computer is not pleasing to the eye of the user, then its entertaining value will be diminished. Smear a computer with feces, and most people won't even want to use it because it stinks so badly; in this case, the computer's usefulness has dropped to zero.


>>
Anonymous 17/10/27(Fri)16:15 No. 16570 ID: 012486

>>16569
Your entire argument hinges on the premise that a computer must be within eyesight of the user in order for them to use it, which is an undemonstrated assertion. You can always hide an unpleasant computer under a table, inside a cupboard, or even in a different room.

Additionally, this is a non sequitur:
>If the computer is not pleasing to the eye of the user, then its entertaining value will be diminished.
This is like saying that the quality of a movie is affected by the appearance of the theater's entrance.


>>
Anonymous 17/12/01(Fri)08:53 No. 16591 ID: 86f262

personalization of the desktop doesn't sound like a assignment....

if you want to make it personal, you need to take the picture yourself. There is nothing special about a good quality pic from the web.

For offtopic, i second this guy -> >>16570
Offcourse i would choose the ugly powermachine instead of nice looking computer that barely even computes.




Anonymous 15/07/26(Sun)20:15 No. 16178 ID: c84a9c [Reply]
16178

File 143793450731.jpg - (80.44KB , 8000x500 , solarsystem.jpg )

i just need to upload this somewhere
that fucking bitch tinypic breaks 8000 wide pics


3 posts omitted. Click Reply to view.
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Anonymous 17/10/06(Fri)21:13 No. 16560 ID: 33427e

>>16558
Do you mean the Latin alphabet?


>>
Anonymous 17/11/23(Thu)02:48 No. 16582 ID: ca57ba

>>16558
It's actually Polish, which uses the Latin alphabet. It's missing a lot of the marks over the letters though, like in księżyc for moon.


>>
Anonymous 18/04/02(Mon)23:33 No. 16637 ID: 5d0ff5

>>16421
i think you mean imgoat




Top 11 Worst Location Data Privacy Breaches aladin 17/10/04(Wed)10:58 No. 16559 ID: 4a193f [Reply]
16559

File 150710751028.jpg - (46.50KB , 960x560 , Overview-of-Location-Data-Breach.jpg )

Although we think our data is safe, we often give chunks of it away to third parties without the proper knowledge of how that information is stored and used. And we also don’t have a clue about the most important thing of all, how do companies keep our data safe. In most cases, it was discovered that our data isn’t as safe as we thought. Just look at Yahoo, and the company’s two massive data leaks; back in 2013 and, 2014 more than 1.5 billion user accounts were affected by all kinds of personal data being compromised. Users’ real names, passwords, email addresses, dates of birth, and telephone numbers were stolen, making the breach the biggest one in history.




scientific surrendur Noble Lass 17/09/17(Sun)22:29 No. 16547 ID: 36394f [Reply]
16547

File 150568014310.jpg - (32.45KB , 500x650 , hitler_in_paris_1940_500x650_1044119901.jpg )

AYYYYYYYYYYY

what it do fam


1 post and 1 image omitted. Click Reply to view.
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Noble Lass 17/09/17(Sun)22:30 No. 16549 ID: 36394f
16549

File 150568025137.jpg - (187.10KB , 800x592 , Haitian-revolution-Battle-Vertieres-1803.jpg )


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Noble Lass 17/09/17(Sun)22:31 No. 16550 ID: 36394f
16550

File 150568029491.jpg - (248.59KB , 1600x1068 , France_Grunge_Flag_by_think0.jpg )

https://www.youtube.com/watch?v=XGSWEOZRTh4


>>
hello+again 17/09/28(Thu)00:01 No. 16552 ID: 050801

Do you work to be this poor at interpretation or is it something that runs in your bloodline? WRONG.
Take up archaeology and get some decent psycho therapeutic medication, maybe then you'll be less of a Bitch Lass. Woof.




Logic is the 0-truncation of n-Category Theory. Americium 16/11/20(Sun)05:20 No. 16385 ID: ed8b6e [Reply]
16385

File 147961565686.png - (75.30KB , 500x562 , true_false_paradox.png )

Let's see you normies try to logic your way out of this one.


10 posts and 1 image omitted. Click Reply to view.
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Anonymous 17/08/15(Tue)07:32 No. 16537 ID: c1b3cc

b) False

"False" is not the same as "false".


>>
Anonymous 17/08/31(Thu)17:32 No. 16541 ID: eee0bd

Since false is in quotations i assume it refers to false as in untrue and not answer B, i cannot incorrectly answer the question because i dont have the answer key, therefore my choice is A because i assume i know the correct choice.


>>
Anonymous 18/08/14(Tue)17:17 No. 16691 ID: b0af4c

>>16385
No




Anonymous 17/05/05(Fri)06:24 No. 16495 ID: 97b52b [Reply]
16495

File 149395827559.jpg - (71.66KB , 289x317 , Ungus Fungus.jpg )

Why does the frequency of a wave multiplied by its wavelength equal C?


5 posts omitted. Click Reply to view.
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Anonymous 17/07/12(Wed)09:08 No. 16524 ID: 3b41a8

Infinity in a Reimann universe is equivelant to -1/2 +- sqrt(1/12)


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The owner of the CIA says howdy Joshua Paul Lee Roy Bietz MD Neurochemistry 17/08/02(Wed)00:09 No. 16531 ID: e6c346
16531

File 150162534446.jpg - (510.33KB , 1600x1200 , 15016254225271915386741.jpg )

c=nu*lambda; nu=frequency and lambda=wavelength
The unit of frequency is cycles per second and that of wavelength is a displacement. Therefore, dimensional analysis provides you with displacement per second. Also, many electric and magnetic fields travel at speeds different from the speed of light, both faster and slower. Faster ones make it out of black holes, which ones depends on the escape velocity of black holes. The question you want to ask is how can we know theoretically that the matter eaten by the black hole conducts, and well, which we know from the electric and magnetic fields that escape from it near the axis of rotation.


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Anonymous 17/08/25(Fri)19:53 No. 16538 ID: b659c8

quantum physics is stupid. waves, quants, photons. blah blah. it doesn't make any sense. physics in this regard is a giant bloated mess full of convenient mathematical tricks, but there is actually no real understanding, because no real observation can take place at this scope.




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