[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.

>The vast majority of Mars colonization autists would return back to earth after spending a week on Mars
Prove me wrong
38 replies and 3 images omitted. Click here to view.
it sounds comfy.
you can do it right now anon.
Mars is basically a desert so middle easterners should be right at home.
God, that sounds like a utopia for me. No more worrying about privacy, and no more shitty social media. Just me, a beefy ass computer, and a hydroponics farm.
We don't want to go wh*te boy. You go. We don't give a shit about space.

>not being in a state of perpetual existential crisis
And that's how I know you have low intelligence
40 replies and 4 images omitted. Click here to view.
I'm 30. It started when I was 5. If it goes away at some point it's sure taking it's time.
posits logic. can't explain what he means.
*hardy laugh at his expense*
Since you're getting angrier with each post, I think it's best if we leave this argument as is and stop at this point. I'll just reply to two more points you made and then I'll stop replying to this thread altogether. There's not much I can say about it anyway.

>Yes you can, because you’re literally attempting to use logic to prove your point that the universe is impossible.
Glad you found the problem. Now think about it. If you have the guts for it.

>I’ll make up a word for it, though. It’s called Zorp.
I like it. I'll call it Zorp from now on.
>Glad you found the problem. Now think about it. If you have the guts for it.


The universe exists. Therefore, your claim that the universe is impossible is disproven, and the methods you have used to reach the conclusion are flawed.
You have to deal with it. It doesn't go away, you make peace with it.
You need to find your own approach to that, but if you don't you will be spending a ton of mental energy over something that can't be changed, and that's futility itself.
You need to spend your energy on the things in your life that CAN be changed, and make the best life you can.
Work on changing your point of view regarding this issue you can't solve.
Consider how beautiful existence is.
Consider how lucky you are.
What is, is. And that's beautiful, too.

The questions posted in this thread are small.
289 replies and 39 images omitted. Click here to view.
What will the world be like in the year 2000000? That's 1998000 years from now.
1997981* years from now
If we have two vectors with corresponding coordinates, such as (x1,y1,z1), and (x2,y2,z2), in order to find an area of parallelogram, should I beforehand find an angle between them, or just calculate the determinant?

no bulli plz
we'll build a wall to keep andromedans out
The two most efficient methods should be:
>calculate the cross product and take the norm
>remove the projection of x onto y to get z, calculate the norms of x and z, and multiply
The logic behind the first is in the previous picture. Behind the second is how every two parallelograms that have the same base and height have the same area, so you find the rectangle that shares its area and calculate that.
The second one is particularly easy to do by head.

File: tuulpgK.jpg (263 KB, 1200x750)
263 KB
263 KB JPG
What's a good major if I am not particularly interested in anything?
10 replies and 2 images omitted. Click here to view.
Not OP but MechE it is then
Geologist here (actually graduated last year and got a job in .... engineering? Whatever). Still, I would like to give a plug to geology. My classes involved a lot of outdoors, hiking (they make these easy enough for THAT ONE FATASS ... you know the one), and literal weeks of camping where you map rocks in daylight and sit next to the campfire drinking with your geo buddies at night. And the world needs more geologists ... even if your dad helps get you a job at an engineering firm because he knows somebody and they really need someone.

I cannot fathom why anyone would do anything else.
consider a gap year. Do informational interviews. https://careers.xqsuperschool.org/ Don't let a lack of interest be an excuse.
spotted the CS major
i dunno maybe we dont have daddy holding out hands to get a job so we can risk getting a shit degree

File: ContraPoints.jpg (316 KB, 1920x1080)
316 KB
316 KB JPG
Hey /sci/, I've got a question to you, biologists. So I understand that homosexuality is a wide-spread phenomenon in the animal kingdom and there is nothing wrong with being gay because that's just how certain organisms work. It is not like animals in general and humans, in particular, make a conscious decision to be gay. Now, poe poe, are there any biological underpinnings to transgenderism the same way as to homosexuality? or is it just a meme/ fashion among modern youth (pure cultural indoctrination)? serious question, I'm not a bigot!!!!
Its a direct result of overexposure to porn and society brainwashing them to “just be themselves”. Porn wires your brain to want it, society encourages you to get it, you inevitably kill yourself for falling for it.
Homosexuality and transgenderism are two sides of the same coin. The only difference in their neural networks is the gender disphoria
Please never say “neural networks” again. The way you use it reeks of brainlet.
What else do I call their brainscans?

File: Who-Tardis.jpg (121 KB, 1001x1001)
121 KB
121 KB JPG
I'm designing TARDIS
It's a box with a portal to another room that gets teleported to an alternate dimension at a certain point in the time (I'm hoping a continual closed loop of time to avoid any paradoxes)
I need to work on teleportation, portals, alternate dimensions, and time travel to get it to work, does anyone have any literature I should read or groups I should join?
Is the larp containment board. Get back in your cage brainlet.
Too late, I already invented it in 5 years time.

Quick point, why is it that Star Trek really managed to grab people's tech imaginations? Everyone wants transporters, warp drive like in Star Trek, scanners, phasers... why does nobody want a sonic screwdriver and a box that's bigger on the inside?

Why do modern genetics attack someone for believing in thr concept of racial superiority but never expose the people who believe genetic differences between human groups don’t exist and every human is born equal?
126 replies and 16 images omitted. Click here to view.
>He said laws should be race-based.

I doubt it.

He says that he is “inherently gloomy about the prospect of Africa” because “all our social policies are based on the fact that their intelligence is the same as ours – whereas all the testing says not really”

What's wrong about that?
All racists want slavery, they'll want Jim crow laws and apartheid when they're feeling particularly charitable and nice. Maybe this time they'll want a race war with lots of actual genocide against minorities not that white genocide whining they do.
You can stop caring if you like. But don't treat it as if it's not a problem
There are no clear boundaries between colours either. Consider yourself rekt
Is this bait?
Not an argument.

File: cryo-EM.png (547 KB, 789x593)
547 KB
547 KB PNG
It won't be long before the secondary structure is solved.
27 replies and 10 images omitted. Click here to view.
You fire xrays at a crystal and it forms an interference pattern. You can then analyse the atomic structure and arrangement by looking at thr interference pattern.

With protein either the protein is very nice and is (mostly) crystalline, or you do stuff to make it layer up and make it crystalline or probably a handful of other stuff you can do.
I understand the advantages of cryo em (it is expensive though) but I have no clue what the OP here is trying to present us with. He keeps talking in wistful language without actually saying anything.
Oh, they're just using cryo-em and protein data to build a dataset for machine learning as far as I can see. You can then somewhat predict what certain protein bits make/how to make bits you want out of proteins using that data. Secondary structure is obv not "solved" with this, but it's still nice and has some cool immediate uses.
>Please do all my thinking for me
Correct terminology is not jargon just because you don't know the words.
File: atomic resolution.jpg (196 KB, 1019x582)
196 KB
196 KB JPG
They only recently achieved atomic resolution.

>What are only approximations?
No one actually knows the precise sequence of proteins. Nor is it known exactly how they fold.

Have you ever read a molecular biology textbook? Most of it deals with genetics. The rest deals with proteins. The only reason it's not half and half is because genetics are better understood. Proteins and genetics are like two wings of the same bird. Two halves of a single equation. Both are needed to cure all diseases.

>what if this turns out not to be the case? Sure there might be building blocks, but they might be useless for predicting actual structure.
The protein hierarchy is a well established theory. For many years it's been possible to determine where each secondary structure is in a protein domain. What hasn't been done yet is precise sequencing.

>bullshit. Ok great. Now we can compute the structure of proteins in a noninfinite amount of time. Great, but what about proteins that change shape and interact with each other. Figuring out stuff that changes shape and interactions could be very hard. Oh hey, we sequenced your genome, we found a number of proteins that are shaped badly and are giving you disease, there's nothing we can do about it. We know the shape, but we don't know how to go in and change them into the right shape.
That's what chaperone's are for. They make sure a protein folds correctly. For living humans, they can take a chaperon medicine. For future humans, genetic engineering can edit the chaperon defect.

An approximation means the protein sequence in a database isn't exact. It's not even close to being exact.

The breakthrough of cryo-EM is atomic resolution. No more blobology. Pic related.

File: 1547716620102.jpg (254 KB, 1209x720)
254 KB
254 KB JPG
Ive got a date tomorrow with a 10/10 columbian girl but im getting a cold. Taken some cold and flu tablets and antibiotics.

What else should I do? Need to kill this or stave it off until after saturday.
4 replies and 1 image omitted. Click here to view.
how much did she cost? might want to reschedule the appointment
Last time I saw her it was about $25 for a couple of her birthday rounds.
Pop an ecstasy if you eant to be a “kind guy” or do some coke if you want to be alpha. Thank me later.
What ever you do, use protection. Retards like you are going to kill us all, we dont need your inferior intellect being passed on to another generation.

File: Capture.png (278 KB, 1250x710)
278 KB
278 KB PNG
Brainlet here. Is there any program/simulator for electrical circuits that allows you to implement dependent sources like in pic related?
1 reply omitted. Click here to view.
Ohms law?
Can't find it. What's the website?
If this is from the book I think it is there should be a section that explains how to use a SPICE program for this stuff. Check out orcad Pspice or LTSpice
have you tried just uhh solving the circuit?
LTSpice its free and easy to learn

Will SpaceX really land on Mars by 2030?

62 replies and 3 images omitted. Click here to view.
thanks for interpreting my rambling shitpost
the USSR was actually more efficient, it's just that korolev died. they didn't have production issues, at least not by themselves, but rather design issues after korolevs death
>can't design anymore
it's not that they can't retard, why would you waste effort on something that already exists
Mars is cubic
NASA cannot design a spaceworthy architecture if their life depended on it. Just look at the clusterfuck that is SLS. Even ULA with their ACES concepts makes a lot more sense, and they are crony capitalists to the core.
So is Musk.
China will be the first to Mars.

File: 1545573020684.jpg (210 KB, 2500x1169)
210 KB
210 KB JPG
ITT: discuss engineering, engineering careers, and whatever engineering projects you're working on

>Should I go into engineering?
Well, it depends on what reasons you have for considering an engineering subfield.

GOOD reasons:
>I am looking for a challenge
>I already have lots of connections to industry
>I have a good support network that will help me during school/while finding a job

BAD reasons:
>I have delusions about becoming the next Elon Musk ("I want to change the world!")
>I want a high paying job
>I want a low stress work environment

>How do I get into R&D?
Generally speaking, you will need at least a master's degree if you want to do actual engineering. Though tread carefully: you can just as easily educate yourself out of a job by becoming overqualified. Make sure you have appropriate industry connections and experience before pursuing grad school.

Comment too long. Click here to view the full text.
231 replies and 8 images omitted. Click here to view.
I don't even want to be an engineer nor make my own thread but what's the process like for getting into college? Just curious.
i have yet to show up to one of my classes and haven't even met my professor
starting to get emails from a worried professor
Your professor cares about you. Go to class and be thankful your prof gives a shit.
For grad school?
Undergrad, need a four year degree with good grades ∆ ∆

File: Brainwashed.jpg (291 KB, 600x375)
291 KB
291 KB JPG
Can we use genetic engineering to change human nature into anything we want? Can we make people think and behave exactly how we want them to think and behave by merely modifying their genetic makeup?
1 reply omitted. Click here to view.
File: 1540560685451.jpg (69 KB, 750x732)
69 KB
If you try something like this you have violated the NAP and will face appropriate consequences
like cows and stuff, except in a more advanced way obviously? I don't think they'll let you do that, unless it becomes a parent-does-to-child thing, or the future will abolish the parenting role paving way for the state to take care and do such things to children. (I'm assuming I understand how genetic engineering works lol)

wisdom is nice, but what drives humans is a carrot at the end of the stick (most, at least) so I wouldn't expect wisdom to dominate or possibly even be a big part of the equation. Best case, there'll be some rotten eggs out to make big bucks. I imagine the defense industry is top, although who knows if it were universally beneficial in reality while still serving the evil purposes of people in power the most. My observations of the world so far make me think so. The biggest drive comes from those who exclude everything else. The most evil and apathetic, on occasion. But, perhaps that could change with universal income or something (I can dream)
File: Human Augmentation.gif (54 KB, 700x520)
54 KB
Yes, but careful with this.
>premenopausal women withstand blood loss better than men
>more energy
>nutraceutical cocktail
Does Lan Bo Chen frequent nootropics threads on /sci/?

File: Raman.jpg (86 KB, 1280x720)
86 KB
Hey folks,

I'm currently working on research that enables us to remotely detect life from a rover-like system. We're deciding to use Raman spectroscopy as our primary method of doing so.

What would be some solid indicators of the existence of life in soil/rock? I'm thinking amino acid presence would be most convincing, but I remain unsure.
6 replies omitted. Click here to view.
>Also, what about dead organisms? Would unconsumed ATP remain that could provide any sort of a signature with your mentioned test?
It's typically going to detect dead organisms, ATP under normal circumstances tends to remain inside the cell. Here's a vid of someone using an ATP meter to give an idea of how it's used:
This seems incredibly simple. What do you reckon is the downside?
Like I know. Probably you still fuck it up somehow and can't work out why you don't get any results?
hahahaha, my bad.

With my limited biological expertise it never even occurred to me that measuring ATP activity would be a clear indicator of life. I can't believe I never thought of that, and the hardware seems to at least be a lot less ambiguous.
A lot of biologists are not all that aware of it as a thing either, but it's incredibly wide spread in H&S food testing stuff. The main issue you'll find is the same as second gen ATP detectors are built for, you're going to have a lot of other molecules about and they could potentially screw around with whatever you're testing. Depending on how you're later verifying the actual presence of microorganisms, you might find that that secondary process misses some organisms, or that you're detecting old ATP from long gone organisms.

I'd say as well that other tech that I know of that's similar to this stuff uses stuff like Mass Spec and NMR to sniff things out, but the machinery is still quite large and heavy and vulnerable to contamination. There are some very rudimentary machines that are getting stuck on tractors and used in airports now that detect for soil conditions/microbiome or drugs or whatever.

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.