[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / r / s / t / u / v / vg / vr / w / wg] [i / ic] [r9k / s4s / vip / qa] [cm / hm / lgbt / y] [3 / aco / adv / an / asp / bant / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / qst / sci / soc / sp / tg / toy / trv / tv / vp / wsg / wsr / x] [Settings] [Search] [Home]
Settings Home
/sci/ - Science & Math

4chan Pass users can bypass this verification. [Learn More] [Login]
  • Please read the Rules and FAQ before posting.
  • Use with [math] tags for inline and [eqn] tags for block equations.
  • Right-click equations to view the source.

05/04/17New trial board added: /bant/ - International/Random
10/04/16New board for 4chan Pass users: /vip/ - Very Important Posts
06/20/16New 4chan Banner Contest with a chance to win a 4chan Pass! See the contest page for details.
[Hide] [Show All]

All work safe boards are now on the 4channel.org domain. Make sure to update your script blockers and whitelist the new domain.

There's now a setting option under Navigation to display the full list of boards on 4channel.org

The 4chan Vtuber Competition is over. Click here to see the winning entry!

[Catalog] [Archive]

File: sciguide.jpg (9 KB, 200x140)
9 KB
Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.

If you want advice regarding college/university or your career path, go to /adv/ - Advice.

If you want help with your homework, go to /wsr/ - Worksafe Requests.

File: metal.png (104 KB, 965x625)
104 KB
104 KB PNG
So Elon just confirmed that BFR/ITS/Starship is not going to be made out of Aluminum. They are going with something heavier, he obviously isn't saying what the fuck exactly they're going with.

Since whatever system Elon wants to use to get to Mars cannot deliver less than 100 tonnes to LEO. He has said this repeatedly. 100 tonnes or go home. If they are switching to something considerably heavier than aluminum or aluminum-lithium, this is going to eat into whatever weight savings they might see from carbon fiber in the rest of the vessel.

So what the fuck is going on over there and what the fuck is even happening?
304 replies and 23 images omitted. Click here to view.
Titanium is impossibly expensive at BFS scales and does not play nice with oxygen tanks. Definitely future upgrade path even if only for elements to save mass, but no place for it in early iterations and the prototype.

>alluminium + heatshield covering half the vessel
>steel + heatshield covering leading edges

Now the question is which will turn out lighter, cheaper, and more reusable.
No, you want something with lots of hydrogen. Plastics are a good choise.
If this works then everything changes in the 2030s.
it won't tho
Elon musk doesn't even know how to build cars correctly lmao
>but muh landing first stage
yes thanks to decent software boosters can now land, great job
>he's still shilling

File: Post.jpg (21 KB, 300x400)
21 KB

File: ca6vzskvgji11.jpg (695 KB, 1076x1333)
695 KB
695 KB JPG
>Is X a meme major?
Unless it is Biomedical, Mechatronics, or Systems Engineering your major XE major is not a “meme”. Additional meme majors include chemical and nuclear engineers. They are challenging degrees but there are just not enough jobs to keep up with graduating students. Many bitter anons in these threads are ChemE students or unemployed ChemE graduates.

>Why is Mechatronics or Bio Engineering a meme degree?
They are often very shallow degrees at the undergraduate level. Students end up becoming a master of none and are outclassed by the more common disciplines. For the longest period of time these courses were only Master/PHD opportunities. A good undergraduate program is very rare for either discipline. Your meme state school isn’t one of those programs.

>I can’t find a job
What is your GPA? What is your experience? Is your resume shit? Do you interview well? When did you start looking?
A GPA of 3.0 is the bare minimum for most companies.
Experience is helpful but is not needed to get a job. You will have a much tougher time though and will need to grind out applications. College clubs and personal projects are good ways to get at least some experience if it is not professional experience.
Post your resume if you want it to be reviewed. Try and quantify actions at your job, don’t just list your responsibilities. If you have no professional experience emphasize your school projects/clubs/personal projects.
It helps to practice and write down your answers to question that you think you will be asked. Using Glassdoors can be helpful when trying to figure out what kind of questions specific companies ask.
You don’t need to be a 3.9 GPA, 3 internship, non white student to get a job in Engineering. Just keep in mind Apple/Boeing/Broadcom/Google/Intel/etc, don’t generally hire <3.0 GPA no experience autists that are incapable of talking to other human beings.
259 replies and 19 images omitted. Click here to view.
Reminds me of my dad. Double majored in math/engineering and didn't graduate until he was 28. On the bright side he did get access to a lot of prime college pussy. Met my mom when she was 18 and he was 26.
>are terrified of actually living in the real world and having a job

University is not job training, you go there literally to learn.

>why doesn't everyone rush to be a used car sells man like me?
And? Those 5% of jobs pay a pretty penny. Once you get a clearance you're set for life basically.
Could /eng/ enlighten me about material science, aerospace eng, environmental eng, mining eng, petroleum eng and marine/naval eng?
Is it to late to get into EE at 23?

3 replies omitted. Click here to view.
>tfw overly large penis
ok going back to /g/
I guess that makes me a fucking brainlet, oh well
you wish
everything is correlated to almost everything in some way, what's your point?
>tfw 135 iq and 7" dick
lmao no
however P H E N O T Y P E
is correlated with iq
>tfw Norwood 3.5 at 20
just kill me pls

File: moron.png (9 KB, 211x239)
9 KB
Electrical engineering is the hardest major. It's a lot harder than physics, math, CS, mechanical engineering or anything else. We use the most math. We do complex analysis and we use a table of fourier transforms.
77 replies and 8 images omitted. Click here to view.
as in application via equations
File: math vs ee.png (342 KB, 2510x1150)
342 KB
342 KB PNG
This is from my meme ranked 400 state public university
I forgot to mention that our EE program is still ABET certified and our ME is ABET too and they only need calc 1/2 lol, well EE only needs calc 1/2 + one random math option, not sure what real schools require, although I'd say the math route at our school is pretty standard
Algebraic number theory and analytic number theory are two separate fourth-year courses at my university.
I'm in my 4th year in a 4 year undergraduate course. These are the subjects I've had
- Analysis 1 (2 semesters; sequences and series, limits of functions, continuity and uniform continuity, differentiation, integration)
- Linear algebra 2 semesters (vector spaces, bilinear forms, inner product spaces...)
- 2 semesters of programming in C (the basics)
- Intro to mathematical logic (deductive logic and the basics of ZFC)
- Geometry 1 (analytic geometry; conics, quadrics, basic spherical geometry)
- Analysis 2 (metric spaces, basics of topology and normed vector spaces, differentiation in normed vector spaces, integration on R^n, uniform convergence of sequences and series of functions, integrals etc, differentiation under the integral sign, basic fourier analysis)
- Axiomatic Euclidean geometry (a medieval course, like, literally starting with axioms and deriving all of absolute geometry from them, and at the end we consider the Playfair axiom and its negation, thus going into Euclidean geometry and hyperbolic geometry, and their differences)
- Algebra 1 (a lot of group theory)
- Discrete mathematics (it was actually just graph theory; Konig's theorem, Ramsey numbers, Kuratowski's theorem and graph planarity etc)
- Intro to computer architecture and organization (a really retarded course)
- Diff. geometry of curves and surfaces
- Intro to numerical mathematics
- Object-oriented programming (it was Java; also retarded)
- Mathematical software (it was just LaTeX... also retarded)
- Measure theory (measures, the Lebesgue integral on a measure space, L^p spaces, complex measures, the Radon-Nikodym theorem)
- 2 semesters of complex analysis (the Cauchy-Riemann equations, Cauchy integral theorem, Liouville's theorem, residue calculus, identity theorem, Morera's theorem, maximum modulus principle, Schwarz's lemma, a lot of other stuff, harmonic functions on the plane, Picard's little theorem and Picard's great theorem, Koebe's 1/4 theorem, stuff like that)

File: 1448776499934.png (30 KB, 633x758)
30 KB
Guys, 35 ACT here with low GPA and no notable extra curriculars throughout HS; Can I attend a community college for 2 years, do some volunteer work, and transfer to an elite school? Or am I doomed? Does it even matter?
11 replies and 1 image omitted. Click here to view.
>I want to do more because I know I'm capable
bs. you have no idea what your motives are.
So I should seek therapy?
Thank you
>I don't have a sob story to fall back on: no courageous overcoming of adversity. I was just lazy.
That's most people, including myself, except I realized it after undergrad and not after HS. I still ended up in graduate school and now I'm working harder than most people. Turns out, that's not too hard considering the vast majority of people are lazy and half of the ones who "aren't" are just pretending. The only problem you're going to face, if my experience is anything to go by, is that personality/attitude traits are much harder to fix than you think: you're effectively trying to change what has been ingrained in you for many years. It's never too late to change but it definitely gets increasingly more difficult the longer you put it off. Good luck.

File: IMG_20181211_223458~3.jpg (1.67 MB, 3120x3121)
1.67 MB
1.67 MB JPG
the fuck? should I just drop out?
I can't understand any of this
19 replies and 3 images omitted. Click here to view.
So to have Galois knot theory you need a duality. What is it for knots? Is there a 'knot field' of sorts?>>10209158
sorry, I only do ACS style
MathGen is quite useful to browse through. Many of the terms are standard, so it helps to explore combinatorial-wise connections between different subjects, and play around with them to see if you can actually discover a connection there.
Let's face it. IUT was made up by mathgen

File: Latin America.png (272 KB, 1200x1200)
272 KB
272 KB PNG
Why is Latin America's scientific output so low?
116 replies and 10 images omitted. Click here to view.
I'm going to disagree with you there. There have been a lot of ideas and methods that come from Latin America. the problem really is your too lazy too look up. In Mexico there are various companies leading the research in orthopedic instruments and internal prothesis materials. Birthcontrol was invented by a Latin American. Various medicines have been discovered by regional ethnomedical researchers, but then their findings are exported/outsourced to USA because of money. A boy from my town was hired by NASA at the age of 17 for finding a more efficient way in picking up some kind of cosmic radiation. It is not a matter of brain but funding and was is called "brain exportation" or "brain flight" in my country. Don't let your ignorance gas you up.
>How is this hard to get?

By the fact that in the real world proves that's wrong. Reality. How is this hard to get? Genetics. Genetics. That's what matters in the end.
Amerindians developed every technology more rapidly than Europeans.
>from aurignacian proto-gravettian to solutrean:10000 years (30000BC-20000BC)
>from aurignacian-antelian to start of crop development: 9000 years(30000BC-21000BC)
>from start of crop development to neolithic revolution: 10500 years (21000BC-10500BC)
>from neolithic revolution to earliest use of copper: 5500 years (10500BC-5000BC)
>from neolithic revolution to earliest use of tin bronze: 6700 years (10500BC-3800BC)

>from aurignacian proto-gravettian to clovis: 5500 years (16000BC-10500BC)
>from aurignacian proto-gravettian to the start of crop development: 5000 years (16000BC-11000BC)
>from start of crop development to neolithic revolution: 7000 years (11000BC-4000BC)
>from neolithic revolution to copper: 3000 years (4000BC-1000BC)
>from neolithic revolution to earliest use of tin bronze: 4700 years (4000BC-700 AD)

-"2003a. Tiwanaku Period (Middle Horizon) bronze metallurgy in the lake Titicaca basin: A preliminary assessment. En Tiwanaku and its hinterland, T 2. A. Kolata, (Ed.), pp. 404-434. Smithsonian Institution Press, Washington D. C."
-"1997. El bronce arsenical y el Horizonte Medio. En Arqueología, antropología e historia en los Andes: Homenaje a María Rostworowski, R. Varón y J. Flores E. (Eds.), pp. 153-186. Instituto de Estudios Peruanos, Lima."

Comment too long. Click here to view the full text.
File: 1451061069797186040.jpg (16 KB, 625x626)
16 KB

Can someone explain this phenomenon. My girlfriend has very good dental hygiene. Brushes twice a day and mouthwash at night. But some days and it's not every day, but it's happened a lot, when she breathes near me, even after washing, I can simultaneously smell good mint, and something gross smelling. Neither of us can understand.
7 replies and 1 image omitted. Click here to view.
probably this
Take a look at her diet the smell might be ketones from low carbohydrate intake/early onset type 1 diabetes. Most likely dental related tho
Its the smell of your crotch rot
File: 1544331822367.png (454 KB, 720x775)
454 KB
454 KB PNG
Tell her that mouthwashes gargling your semen gonna solve the problem.
Thank me later

Every fucking day. Every single fucking day when i come home this little faggot just sits there and gives me this stupid look on his face.
>his class doesn't use Shankar
nah m8

File: download (13).jpg (7 KB, 275x183)
7 KB
What iq does a person require to speak a second or third landguage?
27 replies omitted. Click here to view.
My native languages are spanish and guarani
Been speaking english since I was like 5-6?
Learned portuguese in a year because of roommates.
Im doing computer science in japanese in a japanese university so im fluent in that as well (say if native level is 10 im probably 7?)
And I learned japanese sign language because i have many friends who are deaf.

I wanna keep learning languages though. I really enjoy the process of it.
Thats cool bro
>say if native level is 10 im probably 7?

Then you aren't fluent, dipshit.
Why do I hear so many stories about people that can learn languages instantly? Learning languages is fucking hard and I'm a programmer so I'm familiar with the idea. Are they actually just shitty at 20 different languages but think they're hotshots?
it's the same when an actor says he speaks multiple language, but when you hear him speak in yours it sounds absolutely shit

File: 81L6SY%2Bc4JL.jpg (118 KB, 1001x380)
118 KB
118 KB JPG
Larson vs Adams vs Thomas.

Which calc book is the best for beginner self-learning?

Opinions about Thomas'.


Opinions about Addams'.

Why don't you open them and find out ?
Hubbard and Hubbard is the new meme. The red pill is that early Calculus is brainlet stuff and literally any textbook is going to get you to the same place.

>Hubbard and Hubbard

Why this?

File: 35353453453.jpg (136 KB, 964x1388)
136 KB
136 KB JPG
As a scientist, what are your thoughts on Kant?

More specifically, your thoughts on the proposition that we can't know things as they trully are (noumenon), but only in so far they are mediated and interpreted by our specific cognitive structure (phenomenon).
63 replies and 11 images omitted. Click here to view.
there was such pleasure in the initial reading of the Kant Hume debate, but afterwards I've found Hegel to have the sustainable burrowing interest; where '"knowing" as a process' can take us away from the boredom of the Manichean finality of nou/phen & the vague lingering existential angst of something permanently unknowable.
Disagree. Plato’s writing is often some tenuous metaphysical story backed by allegories, while Aristotle tends to directly analyse and categorise things and then create overarching theories which can explain these same things, which is far more /sci/ in my opinion.

Yes. As far as I can tell, this is in fact the only way we can perceive at all. Our apprehension is dependent on the construction of our body, with the addition of technological extensions.

The thing-in-itself is not accessible in the sense that it requires mediation and representation for us to be privy to any form of signification thereof. It is perhaps not an apt analogy, but for the sake of illustration, consider the desktop environment on your operating system as phenomena. Things as they are, are holistically represented, and in necessary relation to the umwelt of the organism, and the qualia which exists in this mediation is not inherent to the noumenon, but a necessary product of our cognition.
I will admit I've yet to read Hegel correctly, partly because of how esoteric and obfuscated his ideas seem to be. This is partly excused because he apparently wrote his Phenomenology under great stress, yet it's strange he never saw fit to return to it and rewrite or clarify it during the remaining 35 or so years of his life.

How? What are you having trouble understanding?

File: 1412165027383501595.gif (1.24 MB, 500x236)
1.24 MB
1.24 MB GIF
is there affirmative action for mentally ill people at burger universities?

Delete Post: [File Only] Style:
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[Disable Mobile View / Use Desktop Site]

[Enable Mobile View / Use Mobile Site]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.