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Board: /sci/
"/sci/ - Science & Math" is 4chan's board for the discussion of science and math.
let that sink in.
Nice "experts" /sci/, I'm laughing with my P100 respirator and goggles.
previously >>>11527570
Many people say that No-Fap is a broscience. But I managed to find many studies showing otherwise. What do you think?
1. Watching pornography can cause addiction just like gambling or playing video games
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4600144/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3050060/
https://www.researchgate.net/publication/289977152_Should_compulsive_sexual_behavior_be_considered_an_addiction
2. Masturbation can cause hair loss
https://www.ncbi.nlm.nih.gov/pubmed/135817/
3. Watching porn causes sexual dysfunction like erectile dysfunction.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5039517/
4.Fapping downregulate androgenic receptors
https://raypeatforum.com/community/threads/masturbation-downregulates-certain-androgenic-receptors-in-the-brain-and-upregulates-certain-estro.6998/
https://www.karger.com/Article/Abstract/99250
5. No-fap raises levels of testosterone
https://healthfully.com/effects-of-masturbation-on-testosterone-5625804.html
6.Porn cause lowering of acetylcholine levels, which causes brain fog
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4600144/
7. Masturbation harms functionality of brain regions connected with dopaminergic system. It can cause decrease of one’s motivation
https://www.sciencedirect.com/science/article/pii/S007477421630068X
https://pubmed.ncbi.nlm.nih.gov/23707935/
8.Porn addiction have its withdrawal symptons
https://pornstudycritiques.com/studies-find-escalation-and-habituation-in-porn-users/
9. People abstaining from porn are better at postponing gratification. No fap also makes you less neurotic and more extroverted
http://www.alec-sproten.eu/language/en/2016/01/18/how-abstinence-affects-preferences/
Share your thoughts
>have never struggled to understand anything conceptually
>physics, calculus, economics, languages, psychology
>was at the reading age of a 12 year old at age 4
>was top 5 in pretty much all my classes of 120+ students in high school
>this was while being very, very depressed, barely sleeping, addicted to degenerate porn, too socially anxious to leave the house, sitting on my own every day in school and hiding in bathrooms at break, abusive father, bipolar mother, no friends
>get into college for computer engineering at a good university in my country
>still the same as usual, no longer coasting but able to put in enough effort to get average marks and be at the same level as my peers
>no real interest in what I'm studying, literally feel dead inside and clinically depressed, in my own head all the time, too weird for authentic relationships where I "be myself", put on different personas around different people from years of reading self help books and social psychology, learned how to be likeable and ingratiate myself with different groups of people through sales jobs and "fake it till you make it!", people have actually called me charming and charismatic, say I have a beautiful smile. I feel like such a fraud
is this an IQ check to see if you actually fall for it?
Have you been diagnosed with coronavirus?
Have you survived or are you currently fighting coronavirus?
Are you a healthcare worker who has to take care of coronavirus patients?
Latest info on treatments and anything else coronavirus?
Latest numbers and data on Coronavirus:
1,097,508 confirmed infections
58,536 confirm deaths
221,303 confirmed recoveries
>*collapses global economy*
Do academics and experts wield too much power /sci/? What can be done about it?
![3D_medical_animation_coronavirus_structure[1]](https://i.4cdn.org/sci/1586084621141s.jpg)
A) Alright has a vaccine and/or cure and no news media is reporting on it because a population in fear is great for their profit margins.
B) Not as bad as the CDC claims and is merely used as an excuse for the governments of the world to invoke a more authoritarian social structure.
C) Our ultimate destruction.
We're dead, /sci/.
Book: "Field and Galois Theory" by Patrick Morandi
Download link:
>https://www.medellin.unal.edu.co/~mmtoro/doc/campos/Morandi.pdf
>http://gen.lib.rus.ec/search.php?req=morandi+galois&lg_topic=libgen&open=0&view=simple&res=25&phrase=1&column=def
Errata:
>https://wordpress.nmsu.edu/pamorand/files/2018/10/Errata.pdf
This thread is dedicated to the study of Galois theory as a group. The idea is to discuss the subject with other anons as you work through the book, whether it be doing the exercises, helping each other through tough theorems and proofs, or asking interesting questions about the material itself.
I've opted for this book since it assumes very little, and has an appendix with most of the results one needs that are perhaps more complicated. It is also crystal clear in its explanations, and the exercises are fair.
>What you will get out of this
Good knowledge of the basics of field and Galois theory that are pretty much a prerequisite for any sort of algebraic number theory, arithmetic or algebraic geometry, and perhaps some use for other fields, such as algebraic topology.
>Minimal prerequisites
1. Basic ring theory: first isomorphism theorem, ideal correspondence, prime and maximal ideals, basics of UFDs, PIDs and polynomial rings.
2. Basic group theory: cosets, normal subgroups and quotients, Lagrange's theorem, actions.
3. Basic linear algebra / vector spaces over a field: bases, dimension, rank-nullity, determinants.
Most of the above prerequisites are briefly looked at in the appendix, so might be worth to read over it first.
>Minimal objectives
Chapter 1, sections 1-5 cover all the basics of field theory and the fundamental theorem of Galois theory ~ 60 pages. Can skip the sections on purely inseparable extensions and the fundamental theorem of algebra. You should at least try to complete section 5 to get the most out of the preceding 4 chapters.
For example:
1. I always translate my problem set/space to a unique one every time I reach the third angle/vector so I can avoid trapping myself into a square/bounded region.
2. It is my own way of providing people access to 1/4 of my thoughts with as much compression of language as I can possible manage as 3/4 of my processing time is always spent simply generating and exploring problem/solution sets.
3. Basically that 1/4 is my input/interrupt space I allow from outside my own memory palace.
> at 13 study special relativity, talk about it with physics teacher
> at 16 programming games in C with graphics
> at 19 they call me autodidact after passing all high school exams despite not attending classes 80% of the time
> at 20, car crash
> general anesthesia they put me down
> slit up my stomach just to check for damage
> at 28 now.
realized, have not learned a single new thing or aquired a single new skill since that anesthesia was performed on me without my consent.
reading a book is like, yeah I get it I can write down a summary
yet this new knowledge is compartmentalized knowledge.
before anestheisa I could integrate various fields
now everything I do is just... not the same level of intelligence.
does anyone have any studies on IQ and anesthesia?
Will this issue ever be solved? Why do people put up with being taught pseudoscience?
[eqn]\mathcal{F}\{ x(t) \} (\omega) = \int \limits_{-\infty}^{\infty} x(t) e^{-j \omega t}dt[/eqn]
What are you working on now that you have free quarantine time, anon?
Im doing DFT implementations on matlab
SPHIDER edition
Thread for the discussion of allopathic evidence-based medicine. We discuss research, offer advice (the best one is to see your family physician), make fun of premeds and shitpost.
>O-ok it actually is we take it back.
>Wearing masks does no good.
>O-ok it actually does please wear them.
>This is not a pandemic despite 10 thousand cases in Italy and Iran.
>O-ok it is a pandemic.
>But don't close your borders that doesn't help!
>O-ok close your borders.
>But this only dangerous for old people!
>O-ok it can actually be dangerous for younger people too.
>But the Chinese numbers are reliable
>O-ok some experts are starting to question them.
------You are here----------
>But this is not a Chinese virus and there is zero evidence that it is laboratory made.
How long until you, WHO, CDC, and the entire media finally backtrack on this and pretend like it didn't happen, like you're doing with absolutely every fucking thing you were wrong about?
What are your opinions on the weinsteins, /sci/?
this angle is beautiful
is it known why here?
ID 802 663 872
PW 853860
To be specific, the illness made my mind slower. But it also made it more efficient and persistent.
I could focus on tasks for long periods of time. My attention wasn't being drawn away to distractions.
When I played video games, I never really made sudden movements or clicks. Even if an enemy popped out of nowhere I didn't react automatically, and instead made a conscious decision first and then made a play.
It almost felt like I had no adrenaline. But it actually made me play and think better. I couldn't do really fast mechanically intensive stuff, but the tradeoff was that I was automatically thinking things through in the background.
https://medium.com/incerto/the-intellectual-yet-idiot-13211e2d0577
https://www.youtube.com/watch?v=L7TnK7BQ9xk
is this shit real?
chem degree here btw so I know lab stuff
China strong armed the WHO into saying that banning travel from China is not needed and also racists
China is sending western nations defective medical goods
China had foreign nationalists send masks and PPE from the country they are living in to China
China needs to be nuked for allowing this virus to become a pandemic
The WHO is also complacent
This is more /sci/ then /a/
>professor starts to review Euler's formula
>only water
>onions, olive oil
>eggs, fish, nuts
>potatoes, brown rice
>sauerkraut, cheese
>carrot/ apple after meals
>banana/ orange before workouts
>gelatine
>vit D in winter
>ab wheel
>farmer walk
>handstand/ overhead press
>pull up/ straight hands pushdown
>pistol squat/stair climb
>hammer curl
>rotator cuff
>spreading toes
>calve raises, skipping rope
>running, sprinting
>swimming, wall climbing on weekends
>long warm shower before bed
>honey aloes body cream, nettle shampoo
>deep pore cleanser/ exfoliating face scrub
>coconut conditioner, herb mint facial mask
>brush teeth and floss
>not oily moisturizer
>melatonine, facemask for bedtime
>30 min meditation with whim hoff breathing
>growing mother-in-law's tongue next to bed
>no sleeping on belly, chest or face
>7.5 hour SLEEP
>30 min meditation with yoga
>hot to cold shower
>single blade shave
>aftershave lotion
>sunscreen
>social interaction
>having a pet dog/ 2 parrots
>reading new things, philosphy
>writing a page for the daily journal
>guitar, singing
>flute, creating new music
>drawing emotional faces, shading 3d
>using pictures/recalling images from memory
>scetching common items in different positions
>using non dominant hand
>strategy and action-rpg vidya
>duo lingo german
>the kazachok he danced really wunderbar
>no porn
>no inhaling with mouth
>no headphones
>no shoes
>no sugar, no white flour
>no smoke, no alcohol
>schrooms and weed once a year
>no other recreational drugs
>hat and sunglasses
I'm getting banned soon for infection edition.
>what is /sqt/ for
Questions relating to math and science, plus appropriate advice requests.
>where do I go for other SFW questions and requests?
>>>/wsr/ , >>>/g/sqt , >>>/diy/sqt , >>>/diy/ohm , >>>/adv/ , etc.
>pdfs?
libgen.is (Warn me if the link breaks.)
>book recs?
https://sites.google.com/site/scienceandmathguide/
https://4chan-science.fandom.com/wiki//sci/_Wiki
>how do I post math symbols?
https://i.imgur.com/vPAp2YD.png
>a google search didn't return anything, is there anything else I should try before asking the question here?
https://scholar.google.com/
>where do I look up if the question has already been asked here?
https://warosu.org/sci/
https://boards.fireden.net/sci/
>how do I optimize an image losslessly?
https://trimage.org/
https://pnggauntlet.com/
Question asking tips and tricks:
>attach an image
>look up the Tex guide beforehand
>if you've made a mistake that doesn't actually affect the question, don't reply to yourself correcting it. Anons looking for people to help usually assume that questions with replies have already been answered, more so if it has two or three replies
>ask anonymously
>check the Latex with the Tex button on the posting box
>if someone replies to your question with a shitpost, ignore it
Resources:
Good charts: https://mega.nz/#F!40U0zAja!cmRxsIoiLFZ_Mvu2QCWaZg
Shitty charts: https://mega.nz/#F!NoEHnIyT!rE8nWyhqGGO7cSOdad6fRQ (Post any that I've missed.)
Verbitsky: https://mega.nz/#F!80cWBKxC!ml8ll_vD2Gbw4I1hSLylCw
Graphing: https://www.desmos.com/
Answer engine:
https://www.wolframalpha.com/
Tables, properties, material selection:
https://www.engineeringtoolbox.com/
http://www.matweb.com/
NASA awarded the Association of Universities for Research in Astronomy (AURA) the contract to manage the James Webb Space Telescope Science and Operations Control Center. AURA was the only applicant for the contract.
The contract is for products and services required to prepare the science program; develop ground systems; provide science and engineering support; provide integration and test support; perform educational and public outreach; perform flight and science operations during the launch and commissioning of the James Webb Space Telescope (JWST).
AURA will manage the Science & Operations Control Center at the Space Telescope Science Institute in Baltimore. The total estimated contract value is $162.2 million. This procurement will result in a cost-plus-fixed-fee type contract. The period of the contract is from now through launch, plus one year.
The JWST is scheduled for launch in 2011 aboard an expendable launch vehicle. It will take about three months for the spacecraft to reach its destination. The JWST will reach an orbit approximately 1.5 million kilometers (940,000 miles) in space, called the second Lagrange Point (L2), where the spacecraft is balanced between the gravity of the sun and the Earth.
To see deep into space, the JWST will carry instruments sensitive to the infrared wavelengths of the electromagnetic spectrum. The new telescope will carry a near-infrared camera, a multi-object spectrometer and a mid-infrared camera/spectrometer. Infrared capabilities are required to help astronomers understand how galaxies first emerged after the rapid expansion and cooling of the universe, a few hundred million years after the big bang.
NASA's Goddard Space Flight Center, Greenbelt, Md., manages the JWST for the Office of Space Science, NASA Headquarters, Washington. The program has industry, academic and governmental partners, including the European and Canadian Space Agencies.
>scheduled for launch in 2011
Looks pretty convincing to me.
Some regular daytime telescope shots of the moon for reference:
https://www.youtube.com/watch?v=7CeGlt19ESo
https://www.youtube.com/watch?v=Xf9uzawmI3A
https://www.youtube.com/watch?v=Erq2qjcGS6M
The Japanese are the strongest desusi osusi~.
Why do you purposefully write your papers to be as cryptic as possible for people outside your area? You know you don't have to do this, right?
I'm currently taking 15mg IR BID, but this dose fluctuates wildly depending on daily activity. I have learned that I can't hold onto the drug myself either because I abuse the shit out of it when I do, so as of recently I've been having my mom administer them to me instead (not without a lot of screaming and fighting if I tell her I need more than the daily prescribed 30mg).
Anyway, this shit is driving me nuts-- is rehab the only option for me at this point?
7, 10, 12, 14, 17, 19, 22, 25, 28, 31, 36, ...
- Only kills extremely unhealthy people during a time period where chronic disease and poor health are dangerously degrading the human population, causing societal chaos due to the majority of the population being poorly developed and poorly functioning.
- Only kills the generation that was so short-sighted and self-interested that they left us massive problems such as climate change, pollution, and overpopulation.
- Only kills the elderly during a time where lower population growth is making people concerned about who's going to pay for/take care of the elderly. To the point where people are advocating continuing the economic ponzi scheme of "have more kids so their wages can pay for the elderly", despite all the severe damage overpopulation is doing to the environment, and the unethical practice of extremely poor health people (easily over 90% of the US population) using their bodies to create more poorly developed, poorly functioning people.
- Gets people to start behaving in ways that is reducing their contributions to climate change and pollution.
- Undetectable that it's a synthetic virus.
NOT YET PEER REVIEWED
SARS-Cov2 displaces the porphyrin from hemoglobin, incapacitates red blood cell O2 carrying capacity and causes direct toxicity in lungs from deoxygenation. Explains the hyperferritinemia and perhaps the infarctions as consequence of this.
Porphyrin Is not just In Hb , it s also in myoglobin , mitochondrial cytochrome , P54 enzymes ,, may explain body ache , high lactic acid , high liver enzyme and hypoxia as its caused by tissue hypoxia rather than respiratory hypoxia.
Chloroquine could prevent orf1ab, ORF3a, and ORF10 to attack the heme to form the porphyrin, and inhibit the binding of ORF8 and surface glycoproteins to porphyrins to a certain extent, effectively relieve the symptoms.
>another night of googling images of planets and spending hours in utter fascination
>feel pure amazement that the Solar system has been a constant of civilization for thousands of years
>thinking about how crazy it is that we borrow things from past civilizations, the names of our planets are remnants of an ancient society long gone
There's so much stuff I think about. I hope I'm not alone. I might come off as a dumb Reddit sciencebro saying this stuff and maybe it is kind of a normie take but there is really nothing I can say that describes the pure feeling of wonder every single time I look up to the stars. Every time I look through a telescope I have to wonder if God is real
https://www.youtube.com/watch?v=1fYCaC3hcc8
https://www.youtube.com/watch?v=4ZTpEtWikoY
I've looked into bunch of material, found what I think are good resources, but I'd still like to ask here what are the best books for it and to get extremely good at it from fundamental perspective and then practical perspective.
I have years and years to spend on learning this, so fill me with years of work. If there are books on C++ and practical machine learning, please throw it in here also. I can program and look things up and build stuff, but I know some people here have exceptional, almost unrealistic demands and that's why I came here.
>read about general relativity at age 8
>build atom nucleus models out of marbles
>ultimately inconsequential
>grow up interested in science
>end up in science focused school
>several times a year go to special lecture programs at colleges about advanced math
>read math books all the time, number theory my favorite
>start thinking about college
>self-sabotage my life over stupid shit
>drop out of high school
>parents disappointed
>mother still sends me emails of science articles
>got me into an expensive seminar about infographic design last year
>I was probably the only non-college student there and was a NEET at that point
>it cost probably 250 dollars for her to do this
>I enjoyed it but felt liek a huge burden
>she also bought me a graphing calculator for my last birthday, a really nice one
>i haven't used it
>feel nothing but guilt while at my wagefuck factory job
>want to apologize to them for being a failure and want to hug them and cry and say i am sorry
>feeling goes away by the time I go home
How do I deal with this? They gave me so many things and I ended up a failure of a wagecuck. I did calc and stats in community college and aced them but I left because I had no path to a degree and knew I would fail. Now I want to find a career path involving infographics but I'm not a graphic designer nor am I ever going to have any future in STEM most likely. I hate myself for failing my parents. I barely have the motivation and energy to work on my hobbies anymore or do things I enjoy, let alone study on my own. I did read Measurement by Paul Lockhart, another book my mom bought me for Christmas this year. I guess I could study things on my own but I don't know if there is even any point.
blogpost over
Was anyone else here "destined" for STEM but failed their expectations? I'm not Indian or Chinese, my parents didn't force anything, I just feel bad they give me so much, like they still believe in me.
> 20
> Southeast Asia
> Junior Business Student
> 86 IQ
Why is this board always so wrong? Why weren't we doing this from day 1? It is so fucking obvious that doing this helps, and yet you people screeched on about it not being effective.
Why is this board against science?
It is not an overreaction and it is far more deadly than the flu. If you get coronavirus you will die. Period. Wash your hands and stay away from everyone.
Fuck Donald Trump.
1. Could we use ACE2 inhibitor as a prophylaxis?
2. What about an ACE2 inhibitor in the form of an inhaler could that be used for people infected with the virus but who don’t yet have pneumonia?
>Mathematical Proof of the ABC Conjecture Will Be Published
>how likely am I to get a cute japanese gf this year?
>50/50, it either happens or it doesn't :^)
pic unrelated
>The present moment seems to exist due to our limited human point-of-view.
>This is further backed up by relativity which proposes a block universe in which past present and future are all one.
>However, quantum theory shows that all subatomic interactions are actually probabilistic.
If there is no real "right now" then how are subatomic interactions not deterministic?
126 here
https://m.youtube.com/watch?v=Z7rd04KzLcg
Multitasking is a skill that seems to take great memory and logical reasoning.
I'm noticing by looking at the catalogue that there's quite a few meaningful threads, I remember things being much worse, so I suggest we keep this momentum going.
Let's keep this thread alive, it's gonna pay off.
Cause when educated people have no threads here to post in, they just leave and then we all lose.
I'll start with a question. It says in a QM textbook (as an illustration of how much information you need to know about classical systems vs quantum ones) that for a classical system you'll need 6*K digits (3 momentum and 3 position coordinates and K digits for each), while for a quantum you'll need L^3*2K (K digits for real and imaginary part of the wave function), where L^3 is the quantity of knots (this may be an incorrect term since I'm translating from Russian but hopefully you know what I mean) in the lattice LxLxL. So the question is: what is this lattice they are talking about?
the level of sun radiation / fire / warm weather / changes a population skin color over time. the 'Lucy' likes, antrophormophic apes, were something like light-brown skinned. the black people of africa are black because they stood too much time in Africa with a lot of sun all the time, with no place to hide under shadow. The arabian got more or less warm and cold, and became light-brown skinned. While the european people in the winter and cold, took less sun radiation, fire, warm in their skin, and became more and more white and blonde. simple as that.
who here /actuallyretarded/?
The AXLE was an invention, the wheel is just something you find on the ground.
- adding and subtracting big numbers quickly
- multiplying and dividing big numbers quickly
- roots, logs, antilogs
- sin, cos, tan and their inverses
How can we fix this?
Is it like saying all logarithms converge to a chain moment or some sort of hand-over/exchange event?
Why should I even inconvenience myself by lifting a finger to call help? How can you convince me using logic and reason. Religious arguments are not convincing.
>square root still isn't on the average keypad
Redpill me with Math of programming and Linear algebra.
Now that I have that, I need a data structure to store these vectors in for fast near-duplicate retrieval. Any suggestions other than LSH? It doesn't appear that there are any existing database implementations.
Picture related, but not my project.
I have a challenge for you...
joinxqcp.wixsite.com/xqcp
- Dl hyl dhajopun -
I am new to /sci/, and I was wondering if you could give me a quick overview of this board.
Can you characterize this board in one image?
What is the original content that you as a board are most proud of?
Are there any tripfriends worth talking to?
Note: this is not a discussion on metrication in general. This is specifically about one arbitrary set of measurements replacing another.
You have divisors and dividends and exponents and subtrahends.
For an example take [math]3x^{\left\frac{2x}{5}\right\left\frac{2x+1}{2x-2}\right}.[/math] It's fair to say that in that expression, 3x is exponentiated to the product of the two expressions contained in each pair of parentheses. Is there an easier way to say "expression contained within a pair of parentheses"?
I made a short video that some of you might find helpful, especially these times.
At least it was helpful for me while I was making it.
Just some cinema shots with some music; I just put them together.
Here it is:
https://youtu.be/5n9Cfm8NrLk
Stay safe!
I've gotten this far with it and am aware that I'm probably wrong:
Two objects at rest relative to each other with different masses would notice a discrepancy in the tick of each other's clocks. This means they must move relative to one another for C to be kept constant.
But isn't that a circular argument? Gravity warps time which causes gravity?
Can someone explain or link to a detailed resource that covers why it's the time component specifically that leads to gravitational attraction.
My parents and my landlord are both telling me after the lockdown is over I need to go back to work.
How do I make them understand that I will die if I get the virus?
>consciousness is not a computation
why? he just kinda says it like its obvious
https://www.sciencedirect.com/science/article/pii/S0272775719301104
[spoiler] Is it better than somewhere like Warwick or Durham? [/spoiler]
>what the fuck is this brainlet shit?
It�s some tournament that pairs boards from all corners from this site and throughout simulation in an association football video game (Pro Evolution Soccer), will determine bragging rights for the board for 3-6 months.
>how do they play this?
As mentioned before, it�s done throughout simulation via Pro Evolution Soccer�s coach mode, usually teams have a �manager� to try to give the team a good shot at winning it all by deciding the tactical layout of the team
>Why should I care?
Well, first off it�s for fun and to take the piss, no need to take this seriously, and second, with this time of quarantine, the means of entertainment have been greatly reduced, so why not amuse yourself with a team of 23 /sci/ memes playing against other boards, so why not decide which memes are best representing of the board?
>Is this spam?
Not at all, this is done without the intent of profiting, everything done is voluntary. We are aware of some boardgoers opinion of this so we try to not pester the board with so many threads compared to boards like /sp/ and /mlp/.
>where can I find out more about this?
http://implyingrigged.info/wiki/Main_Page and click on the 2020 4chan Spring Babby Cup link to see more about the schedule and games
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