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/sci/ - Science & Math

 Name Options Subject Comment Verification 4chan Pass users can bypass this verification. [Learn More] [Login] File Please read the Rules and FAQ before posting.Additional supported file types are: PDFUse TeX with tags for inline and [eqn] tags for block equations.Right-click equations to view the source.  08/21/20 New boards added: /vrpg/, /vmg/, /vst/ and /vm/ 05/04/17 New trial board added: /bant/ - International/Random 10/04/16 New board for 4chan Pass users: /vip/ - Very Important Posts [Hide] [Show All] [Catalog] [Archive] File: sciguide.jpg (9 KB, 200x140) 9 KB JPG https://sites.google.com/site/scienceandmathguide/ >> 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: 1576496870142.jpg (82 KB, 512x462) 82 KB JPG Descartes’s first principal, “cogito, ergo sum,” contains within itself two assumptions that undermine its primacy. I ’think,’ therefore ’I’ am. What is ’think’? What is ‘I’? Can we define thought? Can we define self? More importantly, is there room for debate on the nature of both? The existence of either? If there is any ambiguity to either, then we are making assumptions as to the nature of thought and self; thus making ‘cogito, ergo sum’ itself reliant upon its own first principles. Since Descartes’s first principal relies on prior concepts to be defined it cannot be the true first principal. No one can know with certainty what ‘thought’ is. No one can know with certainty what ‘I’ is. In this is the contradiction; certainty is the requisite for the first principle. In an attempt to deconstruct all that remains, there are those who will argue that we cannot define existence, the ‘am,’ or that there is ambiguity and room for discussion there. This may be true. But all discussion, regarding anything and everything, relies upon the primary assumption that there is something to discuss. The existence of discussion itself evidence that there is existence, being that it exists. If existence is in fact an assumption, it remains the first one. In pursuit of a true *first* principal we are left with the primary assumption: There is. “Est.” also watchu guys think about goin back to the moon and also imaginary numbers Comment too long. Click here to view the full text. File: gayfacecomputer.jpg (48 KB, 976x549) 48 KB JPG How is homosexuality not biological if AI can detect a queer their face with high accuracy? 82 replies and 2 images omitted. Click here to view. >> >>15307559 1) AI cannot actually do a good job of detecting it, even in the most general sense (someone who is totally straight versus totally gay), never-mind more specific circumstances 2) Facial features are not solely determined by your genes, retard. 3) Certain features, like eyebrows, are deliberately manipulated by people. They correlate with being gay based on fleeting fashion trends. 4) This study failed to properly control for weight. Literally, the straight composites are basically heavier versions of the gay ones. Gays are thinner due to being disproportionately younger and wealthier. >> >>15307559 in summary: >gay men get their eyebrows done >straight men are fatter >gay men are happier (eyes smile more) >straight women are happier (smile more) >lesbians are fatter >lesbians have weird fucking eyebrows an in further summary, the evidence suggests dating women makes you miserable kek. a fact all men know. women, can't live with them, can't live without them. their pussy feels good, and their nagging feels bad. >> >>15308574 How can you manage to type so much but say so little of substance? It's like reading ChatGPT. >> >>15307559 that's a gay male face but the femoid is just a composite of "i love the hustle and bustle of the city" whyte girls who're on the pill and like totally lgbtgarotflomgwtfbbq+++++ >> >>15308447 ironic considering you don't understand a damn thing about this data. when two gaussian distributions have different peaks, of-fucking-course there will be some overlap in their tails, and even with their 68% confidence bands. nobody is disputing that here. people are talking about how the peaks are unaligned, and where the average members of those peaks fall. there are real, discernable, statistical, quantifiable differences between the facial structure of your average fag and average normie. that's indisputable, and i suspect you're just a seething faggot in the closet who's upset that he's exposed as having faggy facial characteristics. File: solid.jpg (745 KB, 1280x853) 745 KB JPG Mechanical Engineer with Ten Years Experience Making 98k in a HCOL Area Edition Previously >>15272568 This thread exists to ask questions regarding careers associated to STEM. >Discussion on academia based career progression >Discussion on penetrating industry from academia >Or anything in relation to STEM employment or development within STEM academia! Resources for protecting yourself from academic marxists: >https://www.thefire.org/ (US) >https://www.jccf.ca/ (Canada) Information resource: >https://sciencecareergeneral.neocities.org/ >*The Chad author is seeking additional input to diversify the content into containing all STEM fields. Said author regularly views these /scg/ threads. No anons have answered your question? Perhaps try posting it here: >https://academia.stackexchange.com/ An archive of all the previous editions of /scg/: Comment too long. Click here to view the full text. 37 replies and 7 images omitted. Click here to view. >> >>15305238 there's no rigor whatsoever in the vast, vast, vast majority of classes required to graduate, at least in my experience for biochemistry >> >>15306959 >Recruiters don't exist to find a good job for you, they exist to con you into grindstone burnout jobs thats not true. recruiters and head hunting firms typically get paid a percent of whatever your salary is so it's in their best interest to hook you up with the highest paying job possible. >> >>15306993 every school does that retard. which school? >> >>15307666 money and a good life or seething and coping >> I want to be a researcher, but I'm afraid I'll never discover anything important and my life will have been a waste of time. How to beat this? File: 00527.png (1.36 MB, 1920x957) 1.36 MB PNG Why do all AI researchers look like they're on the verge of death no matter the age? 9 replies and 3 images omitted. Click here to view. >> >>15307677 because they sit in front of a screen all day. you dont look any better, Nerd. ur probably even a programmer, the lowest social group lmao >> >>15307677 Because they're just about ready to upload their minds into the computer world and achieve immortality >> >>15308179 >UNDER paid he's most likely already a billionaire >> >>15307677 Because good scientists aren't narcissistic faggots that need hair transplants like your zoomer tiktok idols >> >>15308636 Taking good care of your health is not narcissistic. File: 1679850487020781.jpg (325 KB, 1026x1920) 325 KB JPG Do institutions or organization suffer from psychological maladies in the same way that individuals do? For example, does picrel suggest that The Washington Post is a schizophrenic? 5 replies omitted. Click here to view. >> >>15304424 >"We'll know our disinformation program is complete when everything the American public believes is false." - William J. Casey, CIA Director (1981) There is, for the record, ZERO evidence that Casey ever said any such thing. >> >>15303944 institutions are subject to all the same mental problems that individuals are >> >>15308581 >There is, for the record, ZERO evidence that Casey ever said any such thing. Ironic that you're trying to rewrite history about this. >> >>15303944 Yes. No. You're just a fucking moron, so you can't understand that: 1) the media deliberately makes inflammatory headlines to drive clicks. 2) opinion pieces are considered a carte blanc to write whatever the fuck you want, no matter how deranged or untethered from reality essentially every ragebait article ever circulated is just that, ragebait. It is almost invariably an opinion piece from a deliberately bombastic personality. Your real question is: why are opinion writers for the Washington Post fucking retard? I think we both know the answer there, anon. >> >>15308600 >tfw my high school came down with a case of agoraphobia File: n4s4nBE4tX4G.jpg (94 KB, 936x914) 94 KB JPG Is AI going to change everything we know about history? >> >>15308563 For a few weeks, I took a history class from Dominick LaCapra (this is maybe 98, 99). He was very sure at the time that journalism wasn't fiction. I wonder what he thinks now. >> >>15308563 There's already a ton of fake history and deleted history, so yeah. Why not? >> >>15308563 Me who reads conspiracy theories: Hehe, first time? >> >>15308563 I thought about it and, no, not at all. It does make it slightly easier to falsify events, but not dramatically. Additionally, knowledge about the tech will insulate people from misinformation. People are already well aware of the powers of photoshop, even 90 year old grandpas. It won't really substantially change the understanding of the past either. It might be slightly easier to forge historic artifacts or texts, but not much easier. I think AI's key importance in the realm of history will actually be studying the history of the Earth's climate (as well as geneologies). We'll be able to use it to know climatic patterns at different eras with more certainty. That will inform a lot more about why historical events happened, such as specific migrations or geopolitical changes. It is cool though. I know you wanted to make a /his/ post about AI and they wouldn't let you. Sorry bro. In reality, I just don't think it'll be that huge of a deal. AI might also drive a lot of historians into unemployment. I imagine that is quite likely. ChatGPT gives me a Master's level answer on any historical question I ask it. It's not perfect, yet, but it's free and instantaneous. What need is there for a history book when I can ask an AI to instantly make one for me? Dark times we're going into. >> >>15308626 How would an AI "studying the history of Earth's climate" arrive at a useful conclusion? What is the AI "studying" that is otherwise unstudyable? File: gorganzo.jpg (34 KB, 807x508) 34 KB JPG The surface area of a spherical balloon grows at 60π in squared/min when it is being inflated. Determine the rate at which the balloon’s radius is growing when the balloon has a volume of 36π cubic inches. >> >>15308289 >Thinly veiled imperial unit troll thead >> >>15308289 >cubic inches what the fuck indeed >> >>15308289 We are not a cheat sheet. Do your own homework DYOH >> >>15308289 first year soon-to-be business majors seething over USCS "Should cheetahs be allowed to go extinct in the wild?" Edition The field of biology is widely misrepresented and misunderstood on /sci/ and in general, even among other STEM researchers. We aim to correct that with productive discussion on the topic. Previous thread: >>15294038 101 replies and 30 images omitted. Click here to view. >> >>15306827 It is entirely self evident you do not read. That isnt the own you think it is. >> >>15306835 >That isnt the own you think it is Of course it isn't, but pointing out you are such a fragile ego retard you accidentally had a 5 post conversation with a tensorflow bot above sure is HAHA!!! You are so pathetic you need to bloviate to a bot and are totally clueless you're doing it. Now that is an own. >> File: IMG_20230328_174030_442.jpg (195 KB, 793x1280) 195 KB JPG >>15306741 >>15306769 >> >>15304957 They’re more of a specialist than most of the others, but that doesn’t mean others weren’t hit hard as well. Cheetahs in Asia were nearly wiped out, but so were Asiatic lions and Siberian tigers despite them being apex predators >> >>15307023 You should fuck with them more by pretending you're a robot instead in the most obviously childish way. Just add "beep boop" and whatnot. It'd be funny. File: chest drain.jpg (31 KB, 491x303) 31 KB JPG Triangle of safety edition Previous thread: >>15251334 We discuss research, DO NOT offer advice (just fucking go see your doctor), make fun of premeds and shitpost. Keep vaccination/clamping/vitamin K/soliciting advice out of this thread and start your own because it takes a lot of space. 296 replies and 44 images omitted. Click here to view. >> >>15307864 First of all, just fucking introduce yourself as a medical student. Second of all, who gives a fuck what your patients think about you? Especially one who went to med school for 2 years only to drop out for whatever retarded reason >> >>15307864 that was my sister you fucking faggot. i'm reporting you and this thread to our local hospital until we find who you are and get you fired for violating patient/physician confidentiality. >> >>15290636 I'm a zoomer, nigger >> >>15308356 I am a nigger, zoomer. >> >>15307864 The worst part is that it continues well into residency and then even once you are an attending, especially if you are a specialist. You will have patients where you really don't know exactly what the fuck is happening and you will have to lie to them to the face, acting as if the barrage of tests you are ordering is based on some kind of prior knowledge or experience. Big reason why I want to become a FM. The option to just say fuck this and refer to a specialist seems based and a great way to live a honest life. File: erdosmg.jpg (75 KB, 780x470) 75 KB JPG /mg/- mathematics general Previously >>15279472 The Man Who Loved Only Numbers edition. Talk maths 107 replies and 30 images omitted. Click here to view. >> >>15307687 Uh... yeah I see that f(x) = 2x makes sense when you just want a function to describe the relative density of those points. Of course it is 2x, that's just another way of saying what I said to begin with. But how do you convert between U^(1/2) and f(x) = 2x? Or generalize this procedure? That's what I was thinking about... I don't know anything about probability theory sorry if that was a stupid question lol. >> File: Capture.jpg (141 KB, 1598x834) 141 KB JPG >>15307801 >But how do you convert between U^(1/2) and f(x) = 2x? If you want to find the density of a differentiable bijective transform [math] g of any continuous random variable $X$ with PDF $f$:
$\qquad f (g^{-1}(x) ) \left| \dfrac{dg^{-1}(x)}{dx}\right|$
is the density of $g (X)$. For functions, which aren't bijections, it is more involved. But the general approach is what I have done here:
>>15307687
>P(U1/2<u)=P(U<u2)=F(u2)=u2

If you want to plot a random variable with CDF $F$:
$\qquad F^{-}(U) ; \quad U \sim \mathrm{Unif} (0,1)$
is a random variable with CDF $F$ where $F^-$ is a right inverse of $F$ (it always exists). This is called the probability integral transform.

>>15307783
Yes I must have made some mistake then. So the required random variable is: $U^{1/ \log_2 3}$
>>
>>15307687
>it seems you have very little understanding of probability distributions.
What motivates someone to write this?
I'm not the guy you replied to but this seems overly unfriendly.
I don't want to play the politeness police, but the guy you reply to was quite unthankful as well.

Guys get your etiquette up
>>
>>15307856
I don't think your function is right (if you're saying whenever you double the distance from zero you double the probability density)
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>>15308037
>(if you're saying whenever you double the distance from zero you double the probability density)
I didn't. I said this >>15307753. Or you said this. I don't know what you want.

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Space booba edition

previous >>15300191
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>>15308612
Not really, that's incoherent. Try this instead
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>>15308300
It is fake, if I had to guess
>>
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>>15308625
You know we have things called "rockets". You may have seen pictures of them. Here's an illustration of one in the form of a japanese cartoon girl.
>>
>>15308625
You're drawing a flimsy analogy to breaking point. Meanwhile you live in an ACTUAL well and the only way you can see the sky is to take a spintrain up to the end of your spintube and peer through the endcap.
>>
PVSTHVMVNVDS can move effortlessly from interstellar space to a crushing five gravities all while laughing at baselines arguing about their preferred environment

What do you think its capablities are?
Will it finally be able to do the experiments for my PhD in Reinforcement Learning?
I think GPT-5 will be max hype to dump the bag on clueless investors before we go on to hype the next "big" thing.
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>>15307735
depending on the supervisor. I'm really happy with my PhD so far. big team, everyone else are really smart. supervisor is supportive and jacked to the tits with money. multiple interesting projects at the intersection of AI and engineering.
I have always wanted to do a PhD and do research when I was young. I was in industry before as a code monkey and found it lacking the intellectual challenge and freedom I want.
>>
>>15306246
You know who else was a vegetarian?
>>
>>15307827
cool thanks, makes me want to do PhD too, though I suppose I have to do it outside my shithole
>>
>>15307879
India? If so, yeah, probably try to find a Europe PhD. they're usually have easier requirements and less competitive than North America.
if you are in China, try to get to the C9 and you can do a postdoc at a top university in the US. plenty of Chinese professors recruit from C9.
>>
>>15306445
Is it worth going into any kind of tech related career at this point?
I'm not rich yet, I don't think I'm going to survive the mass automation tsunami

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What would happen to the human body if you put one end in cold and the other end in hot? Would something bad happen? If so, what?
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>>
If I had to guess, it would result in blood pooling towards the upper body. A bunch of processes are going to be occurring at once. Very overwhelming. Thermodynamics of the body would probably take place in parallel. Your body is trying to regulate your temperature in two ways, after all, to maintain some morsel of homeostasis. The conflicting processes leave potential for overload. If you're lucky, there'll be some bit of heat transfer between sections. Buuuuut, all in all, it depends on if the temperatures occur very suddenly or if the temperatures are gradually increased. I would assume won't be as much of a physiological reaction if your body has more time to adapt and prepare to the respective temperatures, much like how a frog won't realize it's boiling to death if the temperature is increased slowly.

I could be wrong. This is just my guess. Feel free to correct me.
>>
>>15308355
dry
>>
circulation even something out, but the temperature might still be too extreme to keep the head cool. I remember getting heat exhaustion from heavy backpack while wearing snow jacket on a snow day even tough the leg had only normal pants.
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>>15308378
It's pretty unpleasant but I didn't stick around just hanging out of a hole to find out
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>>15308240
Your entire blood will flow to the warm part of your body and you will die.

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Is the universe actually ~13.8 billion years old or just from our perspective?
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>>15308326
The universe appears to be infinite.
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>>15302421
i know everything about the whole universe
>>
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>>15302612
>always existed
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>>15304499
So the universe is preceded by an infinite amount of zero time? I agree. There was infinitely no time before the beginning of time.
>>
>>15303187
>when we look
>aren't even in the observable universe
wat

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