[ art / civ / cult / cyb / diy / drg / feels / layer / lit / λ / q / r / sci / sec / tech / w / zzz ] archive provided by lainchan.jp

lainchan archive - /sci/


[ Catalog ]

File: 1475803241867.png (72.69 KB, 300x300, Gnu-octave-logo.svg.png)

No.1 [Reply]

This is /sci/, the science board. This is a potentially temporary and experimental board addition.

The intent is that this board will be used to discuss science and mathematics. Use /λ/ for mathematical topics more suited towards computation. Be civil and remain ever informative.

All files posted here should have relevance to the topic at hand, such as academic papers or other educational material.

Peruse the board before making a new thread. If a thread is deemed repetitive, it may be closed with a redirection to the appropriate thread.


File: 1491164631112.png (100.41 KB, 300x185, study-material.png)

No.1012 [Reply]

Please post magnet links to best study materials and lecture series available on a particular subject.
2 replies omitted. Click reply to view.

  No.1028

I need good CS courses.
Can I find, like, an entire bachelor compsci course online?

I want to learn it, but right now going to uni is pretty hard to me

  No.1029




File: 1491397911498.png (572.6 KB, 300x300, digitext.jpg)

No.1018 [Reply]

During undergrad I amassed a huge library of textbook pdfs, djvus, etc. but once I actually started trying to study from them I realized how frustrating it is trying to read an entire textbook that has soykafty digitization quality; not searchable, no table of contents/equation links, etc. In cases where I can't find higher quality digitizations of books I prefer to buy physical versions (where at least I can use page-markers) now.

This thread is for posting and requesting digital textbooks which are at a minimum searchable, but preferred with working index and links.

If particular textbooks without good digitization are highly requested here I may consider buying a copy and paying for high quality digitization, and if you have ever paid for a high quality digitization we would all be grateful if you would share the result.
4 replies omitted. Click reply to view.

  No.1026

Engel, Reid 3rd edition of Physical Chemistry ISBN: 978-0-321-81200-1

Searchable, has index and TOC links.

http://162.255.86.72/textbooks/Physical%20Chemistry%20-%203rd%20Edition.pdf

  No.1027

Klein Organic Chemistry ISBN: 978-0-471-75614-9

Searchable, has index and TOC links.

http://162.255.86.72/textbooks/Organic%20Chemistry%20(intro%20txt)%20-%20D.%20Klein%20(Wiley,%202012)%20BBS.pdf



File: 1475866352648.png (623.27 KB, 300x188, a163638861b45cd99537ffdec65d7001145e44b7.jpg)

No.12 [Reply]

I want to read SICM but I know next to nothing about the maths and physics required for it. What should I study to be able to read it?
5 replies omitted. Click reply to view.

  No.185

>>16
This is spot on. If you haven't haven't done any of those things, go do them now, or you'll be stuck. I speak as somebody who tried to do SICM without doing these things.

  No.210

>>16
excellent post. one for the ages lainon.



File: 1476477381190.png (19.82 KB, 300x300, MJu2FgV.jpg)

No.120 [Reply]

I wanted an excuse to post on this board, so I dug up this article. I'm assuming that if it's on arXiv it passes as science.
>A Longitudinal Measurement Study of 4chan's Politically Incorrect Forum and its Effect on the Web
https://arxiv.org/abs/1610.03452
2 replies omitted. Click reply to view.

  No.454

honestly imo the intelligencia cannot keep up with the changing ideas and view points of chans, nor will they be able pin down the changing slang and language we choose to employ. hahahaha

  No.459

>>454
i don't think it would be as difficult as you paint it.



File: 1476545899724.png (10.68 KB, 256x253, 1330122341232.jpg)

No.122 [Reply]

I have a question about evolution. I'm not a creationist or anything like that so do keep the bullsoykaf away, it's just a genuine question.

As far as i understand evolution works by trial and error, i have a race of X and after some generations a mutated X is born with a distinct characteristic, this characteristic might allow mutated X to live longer, have more partners and/or just be more successful in living and thriving, thus he reproduces more and perpetuates his mutation in his race.

My question is about the nature of this mutation. If i'm able to see better at night that's a perfectly reasonable and random-looking mutation, but if i'm able to detect the specific characteristics of rotting food, what the fuarrrk is going on? Between all possible evolution paths i could possibly take, i somehow become able to detect the specific type of bacteria living inside rotten food, and not only that but i can also smell rotten food and recognize the fact that what i'm feeling when i eat rotten food is something bad and i should stop. And even if i do eat, my digestive system will say nuh uh bitch boy you throwing that soykaf up. This boggles my mind, food might be a bad example since we so badly need it to survive, but we can use other animals and the strangely synchronized characteristics will show up, that classic example of the moth is one of them, the moth that changed colors to adapt to the urban environment, adapting to the exact color in a change of environment doesn't look very random, specially considering such a low period of time.

So what's going on here? This really feels like one of those incomplete explanations that high school teachers give you do not overload you with unnecessary complexity, however i never got a better explanation for how evolution works and how much of it is just dumb luck.
5 replies omitted. Click reply to view.

  No.245

i guess, from what i can gather from your post, it's all about your curiosity of the nature of evolution and the roll of the die of characteristics. how do you end up being able to avoid something instead of having a different characteristic of building up against it? (i.e. sensing rotten food, rather than the characteristic of developing a stomach that can handle rotten food).

if i understand this correctly, i'll try to explain.

evolution is not goal-oriented in the sense you originally thought. it has no agency. mutations are definitely random. but the process of evolution that acts on those mutations is not really.

natural selection (the mechanism of evolution) is often described as survival of the fittest. another way to think of it (that is perhaps a little more accurate) is elimination of the unfit. (fitness in this sense just means the capacity of an organism to reproduce and pass on its genes to subsequent generations.)

random mutation generates genetic diversity. some traits that result from these mutations are adaptive ("useful"). this will allow individuals with those traits to survive to reproduce at higher rates than organisms without those traits. some random mutations generate maladaptive ("bad") traits that do actually are detrimental to an individual's survival. organisms with maladaptive traits therefore don't survive long enough to reproduce. or if they do, it isn't at the same rate as organisms with more adaptive traits.

to continue this example: the creature of the same race both branch off with two characteristics: one has the stomach to deal with rotten food, the other is able to sense what is rotten and avoids it. while the race that can deal with rotten food doesn't exactly die, its body becomes more and more adaptive to that lifestyle, and begins to turn into another creature entirely from it's former race. it starts to thrive and even need the bacteria of that rotten food, versus the original race itself, continues to avoid and evolve in a different way. it's how different species develop, although species can be so closely related its those really distinctive environmental factors that forced those mutations that separates them.

so what traits appear is random. but what traits persist in a population (what is or is not adaptive) is not really random. it is entirely dependent on the environment.

Tl;dr: mutations are random, but natural selection (the mechanism of evolution) is not.

  No.269

Y'all guys should go watch some david attenborough documentaries. cosmos also explains this stuff pretty well.



File: 1476630355686-0.png (76.88 KB, 300x142, quote-school-failed-me-and-i-failed-the-school-it-bored-me-the-teachers-behaved-like-feldwebel-albert-einstein-61-70-74.jpg)

File: 1476630355686-1.png (2.89 MB, 200x200, Quantum_Physics_-_A_Beginner-_s_Guide.pdf)

File: 1476630355686-2.png (11.54 MB, 200x200, Capitalism and Slavery - Eric Williams.pdf)

No.129 [Reply]

Share free education resources here!

http://theoreticalminimum.com/courses
Free talks on physics, from beginner (core) to advanced (supplimental)
2 replies omitted. Click reply to view.

  No.186

http://noexcuselist.com/
>The best place on the web to learn anything, free.
Links to free edu sites, like coursera and such.

  No.329

>>129
No one has mentioned it, and I feel like most of us know about it already, but khan academy is always good for the basics of stuff. https://www.khanacademy.org



File: 1475950471573.png (900.19 KB, 200x200, Satelitski internet2-lainon.pdf)

No.17 [Reply]

In this thread lainons post their own papers.
Please also be cautious about having or not having your names on those papers.

Here is one of my never released articles. It mostly talks about satellite internet and specialised implementations of TCP for satellite internet.

But please keep in mind that English is not my mother tongue and that back then I was just a bachelor student at my vocational college. Also for some reason my literature is a mess, it is all there either in the footnotes or in the literature section though.
1 replies omitted. Click reply to view.

  No.28

>>22
Thanks. The key, at least on the transport layer is to reduce the number of round trips between the satellites and end users.

  No.29

>>22
>Over the years satellite internet has become ready for commercial usage.
>Satellite internet is already in wide usage.
>From the following we can conclude that satellite internet is in wide usage.
Oh, an obvious fuarrrk up.



File: 1477513269060.png (342.12 KB, 231x300, b0a2b8b632b5c1bc302fc1a64251d944.png)

No.177 [Reply]

How do you feel about the state of academia as a whole right now?

I go to school in the U.S and find myself becoming increasingly frustrated at the quality of our education. It seems like very few of my classmates have similar thirsts for knowledge and research that I do, while the rest are doing it to get a piece of paper to go into the workforce.

Now I don't particularly think there's anything wrong with wanting the latter, but the education system here has become increasingly tailored towards those people. As a result it feels like University has become nothing more than a machine to spit out employees on one end, and a handful of academics on the other which often seem to fall through the cracks of a decaying ivory tower - all while amassing millions of dollars that ends up being spent on pointless trash. My school seems to be a prototypical example of this, with the coach of our football team getting paid upwards of a million per year and new buildings going up everywhere; meanwhile little has been done to expand the actual resources available to researchers here, and almost every department that isn't medicine or law seems to be struggling.

At the same time, the extreme artificial difficulty of classes placed on students causes way too many of us to suffer mentally and physically as a result. I can't express how pointless it is to force students to constantly regurgitate knowledge on timed exams which are often carefully engineered by professors to guarantee some sort of standard distribution of scores. Add this on top of the external stresses we all seem to face: financial, social, personal, and it's no surprise that most of us are depressed and/or anxious. Why should education make us feel worthless? Why can't we just learn for the sake of learning, instead of being ranked and judged and having to virtually compete against one another? Why should you need a paper to prove that you know something?

I could go on, but I'd rather hear other people's opinions.
14 replies omitted. Click reply to view.

  No.268

>>177
this "paper can prove that you know something" is pretty silly too

  No.273

>>268
you get a piece of paper for almost anything you accomplish tho



File: 1477688055359-0.png (58.61 KB, 300x72, handshaking problem.png)

File: 1477688055359-1.png (14.45 KB, 300x125, basic coin problem with twist.png)

File: 1477688055359-2.png (174.48 KB, 300x213, Super Hard squares problem.png)

No.190 [Reply]

Lets have a puzzle thread. I am not very good at maths, so they might be a bit trivial, but hopefully some of you can get some enjoymeny out of these :-)
13 replies omitted. Click reply to view.

  No.643

>>212

Yeah, I'd say so.


Me and a buddy discussed (or, he convinced me) this in our university Friday bar and came to the same conclusion.

  No.647

>>643
see the hint >>211 its a trick question



File: 1475817282096.png (92.04 KB, 245x300, tumblr_ne7x9uRY0C1t9tak1o1_400.jpg)

No.2 [Reply]

How will the Universe end, lainons?
From what I've heard, it seems the leading theory at the moment is universal expansion to the point that atoms could not be- though there are arguments against this and many alternate ideas. End of the Universe general
39 replies omitted. Click reply to view.

  No.228

>>221
That does clear up significant confusion.

  No.274

>>221
>This goes off topic i fear.
of course not. your definition of sound depends on whether there is a body to "hear" it. mine doesn't, so i suppose the answer is subjective based on your definition of the word.



File: 1477833895538.png (174.02 KB, 300x194, science_by_madcassowary-d5nzc6s.png)

No.215 [Reply]

HI guys, I am wondering, what are some of the issues that modern science faces that slow it down?

I am wondering about both internal and external slow downs.
50 replies omitted. Click reply to view.

  No.447


  No.448

The main thing holding back science is sources of funding. All money sources have some sort of agenda and this pushes researchers to modify their results to match what the cash sources want, whether or not its true. Also, since cash sources want to be the ones that fund big, new ideas in science, barely any experiment is reproduced, meaning most papers are questionable at best.



File: 1477914869649.png (268.32 KB, 300x188, steins_gate__the_committee_of_antimatter_forum_sig_by_damastah101-d7rfuoy.png)

No.251 [Reply]

Hi guys, I was wondering, will we ever be able to use antimatter as an energy source in power plants?

https://physics.stackexchange.com/questions/136124/is-antimatter-power-theoretically-possible
7 replies omitted. Click reply to view.

  No.854

>>265
Well, we've gotten relatively good at making positrons, even using them in relatively everyday life (PET scans if anyone doesn't know), but positrons are orders of magnitude smaller than anti-neutrons and anti-protons. Making actual anti-atoms isn't something we've done a lot, and it seems to be extremely inefficient at this point.

Fission seems like a significantly better option for energy research.

>>853
> to collect antimatter out in space
Where do you suppose we'd get non-trivial amounts of antimatter in space? I've not seen anything to indicate that could be a valid source of it.

Also, your plan doesn't really seem that efficient, with the creation of rockets to send things in space, which is definitely nowhere near cheap, and probably more than we would get back.

  No.885

>>853
You read too much sci-fi material.



File: 1478125693573.png (153.8 KB, 213x300, 3a0092bd1cc018535f0886144158f925db144fcd719bd4ff2a05587fba0cec0f.jpg)

No.270 [Reply]

How do you study, Lainons? Do you use fancy memory techniques? Do you have small rituals that you perform before or after? What do you do during the break? How do you approach topics that you are really unfamiliar with? I want to know everything!
91 replies omitted. Click reply to view.

  No.998

>>994
> where I keep my unstructured notes before they get transferred to LaTeX
Why?
Does it helps you understanding the subject?

  No.1016

>>993
There are answers in the PDF, i think.



File: 1475837718618-0.png (4.17 MB, 200x200, Fitzpatrick R. (ed.)-Euclid's Elements (2007).pdf)

File: 1475837718618-1.png (12.22 MB, 200x200, Walter Rudin-Principles of mathematical analysis-McGraw-Hill (1976).pdf)

No.3 [Reply]

This thread is for science and math related reading material. Textbooks, journals, and peer-reviewed articles are preferred.

I'll start with some classics.
25 replies omitted. Click reply to view.

  No.888

>>884
In my experience American precalc is basically the greatest hits of high school Algebra and Trig, but your mileage may vary.

  No.940

>>878
I started with Randall Knight which really helped
Though I was a second year student in high school when I started, so it might not be what you're looking for exactly



File: 1478443740483.png (534.53 KB, 300x169, shelf.jpg)

No.305 [Reply]

Show us your place of knowledge

  No.336

File: 1478977754821.png (2.61 MB, 113x200, IMAG0105.jpg)

I get excited and read all over the place. I'm less than half way through most of these. Need to be more disciplined and slow down...



File: 1478466207289.png (972.43 KB, 300x169, wallpaper-puella-magi-madoka-magica-anime-girls.jpg)

No.308 [Reply]

Hi, I am a layman when it comes to physics.
Can you explain to me what is dark matter?
What do we know about it?
How far are we from proving its existence?
42 replies omitted. Click reply to view.

  No.904

>>900
i didn't ask for education. i asked for an argument. as if it's smart in being educated through journalist exhibition instead of the real MOND publications. your show and tell is soykaf.

  No.905

It's pretty simple OP. If you apply basic centrepetal motion to galaxies you'd expect the matter near the outside to spinning far more slowly than it actually is (think of how mercury moves far faster than say jupiter - conservation of momentum). As physicists don't really have an explanation the leading theory is there is a bunch of unaccounted mass that makes up for this discrepancy.



File: 1478556143690.png (36.54 KB, 300x200, Snake12.jpg)

No.311 [Reply]

What are some of your favourite books or documentaries about zoology? I started watching Planet earth II recently and it really piqued my interest.
4 replies omitted. Click reply to view.

  No.474

>>473
There was a flaw with posting.

It's corrected now. Post your message again.

  No.486

I used to default on watching Wild Russia when I couldn't decide what to watch. Excellent series, beautiful and comprehensive and thoroughly intriguing. Made me want to travel all over Russia.



File: 1478734898055.png (28.95 KB, 300x169, defofder_lowres.png)

No.323 [Reply]

What qualifies someone as being calculus ready? Anyway to test myself? (I cannot seem to find anything free.) I recently took a university exam which was suppose to find my mathematics placement, but it placed me in beginner algebra. I am mostly self taught (my actual teachers were horrible); however, I forgot a lot of stuff. Surprisingly a lot of programming stuff I have down, combinatorics, truth tables, etc. I think my knowledge has gaps that are making me screw up hard on the placement exam. My apologies for the slight rant /sci/.
15 replies omitted. Click reply to view.

  No.579

In my experience the amount of algebra you need to know for calculus largely depends on the instructor.

I took Calc I twice, ten years apart. The first time, each problem we were assigned would fill at least half a sheet of notebook paper - mostly with algebra. The algebra was mostly transforming the problem into calculus-friendly forms and the combining the results after the calculus.

The second time, the assignments were a lot easier and didn't pound the algebra nearly as much. The problems were already calculus-friendly. Honestly, I learned more the first time around.

I think a lot of it has to do with paperless grading. The first time around, we turned in assignments on paper; the second time, we used WebAssign.

I've completed Calc II but I'm a bit concerned that given how easy Calc I and II were this last time around, I'll have trouble with higher level math courses.

  No.825

File: 1486912798219.png (20.15 KB, 157x200, 51spZWfCAeL._SX258_BO1,204,203,200_.jpg)

>>323
>>323
Think of pre-calculus as a course designed to review *all* mathematics necessary for calculus. It literally starts with basic arithmetic. I would highly suggest checking out this textbook to help you evaluate your skill level and catch you up with whatever you're lacking.



File: 1478956384373.png (100.77 KB, 293x300, Alice-matrix.jpg)

No.332 [Reply]

Do you think we are living in a simulation? Why or why not? I would think the mathematics alone would suggest we are (I can elaborate if you'd like), but the nascent field of digital physics cements it even further for me. I'd like to hear your thoughts lains.
71 replies omitted. Click reply to view.

  No.664

>>359
I feel like I disagree with your initial assumption.

For any universe to be simulated, it needs to be done on hardware acting under an already defined set of rules for that universe. Therefore any rules set in the simulation will inherently be limited based on the rules in the already existing universe. You can argue that the new rules can be decided by the creators of the simulation and therefore can be anything, but, and we're getting a bit philosophical here, their consciousness will be also shaped and molded by the rules of the first universe. This inherently causes some kind of limitation.

I'm not really well versed in philosophy in the slightest so I get the feeling someone who is could explain this concept better than me, but it's basically getting into the metaphysics of the consciousness, and that hasn't been discussed enough about, I'm sure.

  No.672

>>527
He's probably referring to the whole antimatter-matter thing.

You could have stopped him by bringing up mass/energy conservation



File: 1479154570720.png (152.92 KB, 197x300, nichijou___shinonome_nano_by_prehaline-d4heyam.jpg)

No.371 [Reply]

Hi guys, recently I have been working on my notation style and have noticed big differences between notation styles etc.

So I was wondering, which style do you use?
Which style would you use if you had more freedom in choosing it?

Here in Croatia they teach you to use a mostly Oxford alike style with numbered notations, however unlike normal Oxford style, instead of using footnotes, you have to create a Harvard alike bibliography section. As far as I am aware neither MS Office nor LibreOffice support this so you have to do it all by hand.

Now about what I would prefer to use... Now I think that writing footnotes like Oxford does is generally more readable than large bibliography lists plus it provides you with the source on the same page as the text. I also consider that other parts of Oxford are genrally fine. However, I find Oxfords in text notations a bit non-descript, and would prefer to use something more descriptive than simple numbers in there.

  No.372

I usually use the "ieeetr" style with LaTeX.

  No.383

>>372
Way to shoot myself in the foot that's the one I described in the OP, the one I use the most. Sorry, something confused me and I made that mistake.



File: 1476146030448.png (188.12 KB, 224x224, Glider.gif)

No.38 [Reply]

Discuss, post pictures and give your thoughts and ideas on this fascinating branch of compute science and mathemetics.

Resource for beginers:
http://www.conwaylife.com/wiki/Main_Page
1 replies omitted. Click reply to view.

  No.40

File: 1476149910237.png (2.72 MB, 200x200, burks1.pdf)

I was really hyped about CAs for a while, but they are sort of a mystery to me still.
Even though GoL is beautiful and by far the most intriguing one, it is too hard to come across new discoveries in it. I like those which behave like machines, particularly von Neumann's 29-state and it's derivatives, attached is a document explaining how von Neumann's reproducing machine works. Another pretty one is one derived from Wireworld, it's name is something like WWEJ3 irrc.
One type of such automata which I think is most interesting is actually the 2-dimensional turing machine, aka the turmite. Langton's ants are the most popular rule.

  No.140

File: 1476697213827.png (487.13 KB, 200x164, rps-sim.png)

Great article on competing cyclical 2D predator-prey model which looks really pretty too:
http://alexlamb.com/rock-paper-madness/



File: 1479748749230.png (322.56 KB, 261x300, computer_science.jpg)

No.407 [Reply]

Hi guys.
I am 19 and going into college next year(having an off year due to circumstances).

I was wondering, what are the differences between IT and CS? What are the similarities?

Lainchan as I see it is full of CS guys and IT is mostly ignored. Although I like the CS monoculture here, I do think we should at least discuss IT from time to time.
15 replies omitted. Click reply to view.

  No.675

>>414
nice troll post my dude like wow come on

  No.676

>>428
>"Information Technology" is a loose buzzword that can and has been applied to everything from basic office suite literacy (document editing, spreadsheets) to basic ops (maintaining a mailserver for a small company say) to basic (i.e., non-foundational) computer security.
Basically this.

Meanwhile, CS has two different major components. The biggest and most obvious is programming, which is what you do if you want to get a real job with it. The other is more of an applied mathematics thing, where you do a lot of theory work about how efficient things can be and how to make more efficient algorithms for obscure things. That basically means a job in academia.



File: 1479767429026.png (128.95 KB, 222x300, dieglocke.jpg)

No.415 [Reply]

Now that anti-gravity was proven to just werk, when can we expect to have flying cars just like my sci-fi animes?

http://www.sciencealert.com/it-s-official-nasa-s-peer-reviewed-em-drive-paper-has-finally-been-published
30 replies omitted. Click reply to view.

  No.571

>>566
Nah, what I'm thinking of was more recent. Back in like 2011 or something

  No.573

>>566
Wasn't that the Raelians?



File: 1480426600986-0.png (7.88 KB, 250x133, virginPic.jpg)

File: 1480426600986-1.png (7.88 KB, 250x133, virginPic.jpg)

File: 1480426600986-2.png (7.88 KB, 250x133, virginPic.jpg)

No.453 [Reply]

Any physics lains here? Am undergrad and would like to know some cool things that those more advanced than me have learned.
2 replies omitted. Click reply to view.

  No.525

File: 1481620047721.png (42.65 KB, 200x107, wizard.jpg)

>>513
here you go
t. ant

  No.526

I thought most of the lower-division physics courses were easy, so I'll assume you have about the same level of understanding as me.

http://physicsguy.com/ftl/html/FTL_intro.html for the basics of relativity. I didn't really understand that stuff until I read it, but it's only a primer. You need all the fancy advanced math to really grasp it, apparently.

http://www.gregegan.net/DICHRONAUTS/DICHRONAUTS.html is really interesting speculation on what a universe with two time and two space dimensions would be like. Easily accessible, really trippy stuff, I'm definitely gonna give that book a read when it gets published.



File: 1480827035857.png (11.99 KB, 220x298, Cyborg.jpg)

No.475 [Reply]

Hello, I am currently working on my transfer applications for various universities. I am an engineering student, however my current university doesn't offer the discipline I seek (Biomedical Engineering) so I plan on transferring to one that does next fall.
In order to submit my applications, I need to write an essay on an issue of importance to me. Being interested in biotech, I would like to write about unnecessary death due to age related disease and how most of society has accepted it as a fact rather than finding a solution. Unfortunately, I have trouble articulating my thoughts in to cohesive and comprehensive sentences.
I was wondering if anyone has any suggestions on good talking points for my essays? Or even suggested literature on the topic that could aid me?
It would be much appreciated. Thanks!
5 replies omitted. Click reply to view.

  No.519

If we ever make brain to computer and computer to brain immortality real, together with some form of cloning, The most appealing thing in something like that is that I could pick the sex and other physiological aspects of my new body.

  No.521

File: 1481505323173.png (439.47 KB, 200x152, PushingGlasses.gif)

>>475
"The simulacrum is never that which conceals the truth - it is the truth which conceals that there is none.
The simulacrum is true."

Perhaps this would be worth touching on, my transhumanist friend...



File: 1476249701117.png (1.72 MB, 300x169, Screenshot 2016-10-11 at 10.21.06 PM.png)

No.49 [Reply]

astronomy thread anyone?
27 replies omitted. Click reply to view.

  No.263

>>262
if we found some neetland in between the mountains and desert

or we could have an astronomy lain colony in the pacific

  No.264




File: 1481141894443.png (150.61 KB, 254x300, idea.jpg)

No.493 [Reply]

Hello anons!
I have an interesting question. Can one's brain be splitted to two seperated halves (left hemisphere and right hemisphere without connections)? Have you read about such an experiments? What if this person was a kid? Would he have to seperate consciousnesses?

Totally n00bie in biology/neurology here
4 replies omitted. Click reply to view.

  No.505

Like >>494 said, there have been numerous cases where the brain of an individual has been split. Some functions of the brain, such as the ability to perceive objects, draw, process language, etc will be effected the most as there is a degree of communication between the hemispheres so that information can be processed more efficiently. Whether or not separation results in the creation of two unique conscious entities is up for debate, as there are factors such as the level of separation that occurs.

CGP Grey has an interesting video on the subject: https://www.youtube.com/watch?v=wfYbgdo8e-8

  No.510

>>505
thx
interesting video



File: 1481225127883.png (140.86 KB, 300x238, lain_iwakura serial_experiments_lain.jpg)

No.498 [Reply]

How much and in what ways does weeb culture influence computer science and IT?

I mean an influence definitely does exist, othervise we wouldn't have any weeb named websites or tech or similar stuff. (Or we wouldn't have as much)

Then there is the simple fact that scientists and inventors sometimes do look into sci-fi for inspiration. And anime can be good sci-fi as well.
6 replies omitted. Click reply to view.

  No.507

I work at a IT firm it over 200 employees, we mostly do System Engineering and Application Development for other firms. Here any "weeb" influence is non existent. In all my years I only met two guys who consume anime or are interested in Japanese comic culture (at a LAN party, nonetheless) . I guess its rare around here, even for the personalities that are more prone to consume such media.

  No.508

>>507
Well inside a company it might depend on how relaxed the company culture is. Some people draw a big red line between their professional and personal lives.



File: 1481268736174-0.png (2.02 MB, 200x200, Beyond Reduction - Philosophy of Mind and Post-Reductionist Philosophy of Science.pdf)

File: 1481268736174-1.png (3.52 MB, 200x200, An Introduction to the History and Philosophy of Science.pdf)

File: 1481268736174-2.png (2.87 MB, 200x200, The Routledge Companion to Philosophy of Science.pdf)

No.506 [Reply]

Let's discuss it!

  No.531

you start boyo. Pick a topic.



File: 1481378579715.png (2.5 MB, 300x240, platonicrot.gif)

No.512 [Reply]

Oxford interview is the day after tomorrow.

Anyone got any interview tips? I'm studying Physics, if thats relevant.
3 replies omitted. Click reply to view.

  No.520

>>517

Eton is unironically a soykaf-tier school for academics.

Its only good for making "connections" and developing a chainsmoking habit.

  No.590

yeah I know some oxfordians

just pretend you like harry potter, they'll mistake you for one of them.



File: 1482102333195.png (152.52 KB, 213x300, 3e209529811899a18480e9d395e08cc581dc7360.jpg)

No.545 [Reply]

Can we have a thread for discussing how to do research? Where and how to find papers, how to read them, how to organize what you have learnt, how to keep up with changes, etc.
30 replies omitted. Click reply to view.

  No.803

>>713
Well, it's an industry standard. I strongly suggest you to try it, at least. Remember, typesetting is not easy anyway (eg writing equations is a pain, but there are degrees of pain depending on what platform you choose). LaTeX just always seems to have a some sort of 'hack' to any problem. It is also a markup language system, which appeals to people who like programming. That makes it pretty efficient, but it's also quite monolithic. It takes some time to learn it.

  No.822

>>644
This post was very insightful and educational, especially since I'm also extremely interested in functionnal programming. Thanks.



File: 1482376062034.png (33.08 KB, 250x238, i tried really hard but failed because i am a piece of shit - star.png)

No.557 [Reply]

Fellow lainons, I'm a highschool dropout. I don't know any maths beyond your basic arithmetic. I'm programming in Lisp but I also want to learn math. I'd prefer in-depth textbooks but should I just go to khan academy and start from the beginning? I'm hoping to get some solid advice and any books in pdf or other digital formats.
8 replies omitted. Click reply to view.

  No.572

>>557
Paul's Online Math Notes.

  No.574

www.Khanacademy.org

Literally the best math on the net. Passing the sections requires a little too much repetition for my taste, but if you need to know how to do something, their instructional videos are exemplary.



File: 1483480740833.png (799.36 KB, 300x230, a6c.gif)

No.591 [Reply]

http://qz.com/627989/why-are-so-many-smart-people-such-idiots-about-philosophy/?utm_source=qzfbarchive

Personally, even myself being a STEM masters student, I think this is a tragedy. Philosophy and human sciences are just as much needed for human progress as are natural sciences.
144 replies omitted. Click reply to view.

  No.995

>>678
>If your reply is “Thinking deeply about it”, he will smile pityingly and pass you by
But theoretical science and mathematics are still fine right? If there wasn't anyone to sit and think deeply then our scientific efforts would consist of routinely testing the next on a list of as yet untested phenomena until something interesting happens.

  No.996

>>599
I still am amazed why we treat it like that modernly, many centuries ago, for example during the Islamic Golden Age philosophy was under the umbrella of natural science, which encompassed other sciences as well, which I find a likeable idea. (I believe this also existed towards the later time period of the Greeks) The is sort of merged line was also prominent during the time of Western philosophy's start. How and where it ended is beyond me, but I suspect it had to deal with geo-political factors possible WWII or something of the like.

>>669
The idea that scientific fields out mode philosophy is nonsensical. Should not it not be made that if philosophy can be replaced with other scientific fields, that mathematics can replace all other science fields?

There are limitations in science that philosophy is not limited to, just as there are limitations in physics that is not in mathematics. They are all interdependent on each other, it makes no sense that out would ever out mode the other.

A more concrete example would be the Entscheidungsproblem, three people did the mathematics the same, first Church, then Gödel, and finally Turing. Gödel was not satisfied at first with Church's mathematics, and so Church asked him to think up his own definition, when Gödel came back with his own definition, Church proved it was equal to his own definition. Gödel exclaimed then that he was wrong. A little bit later in walks Turing, doing the same exact mathematics but handling the philosophy differently then, and only then did Gödel finally accept it.



File: 1483731990444.png (1.1 MB, 300x169, IMG_20170106_134526_535.jpg)

No.640 [Reply]

An illicit photo taken at my work (a chemical laboratory) . would you be interested in more of these? This place is full of all sorts of down to earth laboratory photogenic goodies

  No.645

This is only tangentially related to science and so has been moved.

  No.646

Moved to >>>/r/28642.



File: 1484391905214.png (170.58 KB, 300x191, Condylura.jpg)

No.682 [Reply]

What are the prerequisites for studying astronomy/astrophysics?
2 replies omitted. Click reply to view.

  No.691

>>683
echo what this lainon said.
Astronomy without a high level of math and physics ability will just land you in the unemployment office--if this is just a hobby, there may come a point where yuo are tired of just knowing the names and explanations of things.

  No.693




File: 1484421966120.png (143.73 KB, 300x200, tumblr_npev5uqn1J1u1rvgeo8_1280.jpg)

No.686 [Reply]

I'm looking for sites to follow for anything /sci/ related. Math, Computer Science, Chemistry etc. General science news is welcome as well.
5 replies omitted. Click reply to view.

  No.733

>>731
Thx a lot. I was not able to find it myself.

  No.734

https://physics.aps.org/
This site is great for showcasing important work in Physics research with references to the research and relevant papers given. I would strongly recommend this for people interested in general Physics news.

https://www.quantamagazine.org/
I'm not so sure about this site, but it might be decent.



File: 1484698943930.png (705.41 KB, 77x300, awwww-so-kawaii-granpa-p-anime-vividred-operation_o_2974121.jpg)

No.698 [Reply]

Why don't we have a thread where we share our own research? Published or not, doesn't matter.

Rule 1: If you want to publish it in the future, to prevent people plagiarizing from you, don't upload the whole paper, most importantly don't show your experiments, results and conclusion.

However it is OK to post the title and your general ideas. (Use my post(down below) as an example)

Rule 2: This is an anonymous imageboard, if you are going to upload the whole paper in pdf here, it is your responsibility to remove/not remove your name from it. Then again, if you manage to publish it in Eglish, it might be moot.(Hey, you should be proud on publishing a paper)

So here are the 3 papers I am researching ATM:
13 replies omitted. Click reply to view.

  No.729

>>728
What I am saying is that, if science continues to develop, we are eventually gonna have to solve those issues. Sooner or later.

  No.773

I am making a poll. If you are a weeb and in CS/IT, please take my poll:
https://docs.google.com/forms/d/1_VPOmjCNtnGrkazS2cZnRGyOgr0u6YKPMDEsFN7kCTw/edit#responses



File: 1484999519618.png (84.66 KB, 300x300, 1445669399933-0.gif)

No.719 [Reply]

I have a few questions about chaos theory. Please keep your answers simple as I'm not a physicist.

Chaos appears when you are studying a system of at least three non linear and interdependent variables. Is that true ?

Does this program reflect chaotic behavior ? http://sprunge.us/KCVF?scheme
2 replies omitted. Click reply to view.

  No.793

>>789
>Hello, I'm the lainon who's writing the chaos piece for the LZ4.

That sounds interesting. Is it available somewhere for reading yet? I'd really like to get a bit more insight into the subject, especially if it's written in more layman-ish terms.

  No.794

>>793
well it will be on the LainZine I hope...



File: 1476354001525.png (11.42 KB, 300x225, hqdefault.jpg)

No.72 [Reply]

So, what are your favourite areas of research?

While I like anything CS related, I definitely prefer more networking and security related research.
31 replies omitted. Click reply to view.

  No.299

Signal processing is a neat topic. I know it's super broad, but like everything in that domain is just so fucking cool.

  No.1005

>>299
Hell yeah!
Nothing wrong with enjoying a super broad field, I'd argue the opposite.
It's neat to understand general knowledge, as it leads to a large number of applications.
Just look at graph theory: nearly every practical problem can be expressed as one, speaking hyperbolically.

Not that fond of signal processing myself, but I feel that we would find common ground somewhere as I'm really into control theory at the moment.

I myself getting my feet wet with AI and generally how to implement it efficiently on a FPGA/ARM SoC for some robotics project at campus.



File: 1485071595326.png (571.5 KB, 300x169, Leaves3.jpg)

No.721 [Reply]

Here's a thing I was wondering about the other day.

There are things that probably everyone here would agree upon - as an easy example, let's just talk about Earth not being flat. There are people, online and offline, that disagree with this fairly simple fact, which might come from a misunderstanding of science, distrust in the establishment, something like that.

My question is - how much should we dignify these people with discussions and responses? It is very unlikely for the minds of such people to be changed, no matter how much proof is thrown at them. It could be said that such cases are good mental exercise, but, more often than not, they are low hanging fruit that's so shaky that it's not even fun to disprove.

Could it be that giving these people the attention is causing more harm than good, from wasted time to other people starting to agree with them? And if so, how should we go about judging what beliefs are "OK" to discuss?


File: 1485634066853.png (76.22 KB, 300x300, 10-radio-tower-logo-free-cliparts-that-you-can-download-to-you-1iueWE-clipart.png)

No.741 [Reply]

Welcome to Ham Beginner General!

This thread is for anyone interested in amateur radio who's not sure where to start or anyone who's already into ham radio looking to help others.

Rules:
- Don't post call signs if you value your anonymity
- Google before asking
- No bullying or just acting like an asshole
- Have fun
9 replies omitted. Click reply to view.

  No.823

>>745
SSB receiver? There are a good few simple SDR designs out there too if you want something more modern.
Maybe a beacon of some sort, low powered morse temperature transmitter or foxhunt target.

>>764
Not particularly - radio amateurs have an allocation in the 2.4GHz ISM band, but all countries prohibit the use of any encryption by amateurs (WW2 espionage fears + it would prevent the regulators from ensuring that the bands are being used for non-commercial use only). You can do so, but it has to be open and you could never use anything like HTTPS over it.

  No.997

>>821
(another lainon) Pretty simple: it works much better than the included one, though it's also much longer, so it can be a bit clunky.



File: 1476370384271.png (2.28 KB, 139x35, 2481065c6a33df9fee45fa3ae60d168fd6084109.png)

No.76 [Reply]

Do any of you know any good (Relatively simple if at all possible) introductory books or other recourses to quantum physics? If they're books, do you perhaps have them in PDF form (if not then the title and author is fine)?
feel free to move to lit if that would be more appropriate
17 replies omitted. Click reply to view.

  No.802

File: 1486204890236.png (33.23 KB, 172x200, keep-calm-it-s-only-further-physical-chemistry.png)

>>692
>If you're studying chem and trying to understand the strange way the chemists treat the subject(like voodoo most of the time); When you find a good reference please let me know.

My uni uses Atkins' Physical Chemistry (also a general physical chemistry book, not so deep in QM) and Fayer's Elements of Quantum Mechanics(hard to find online, tell me if you succeeded). I don't know if they are actually good enough. I heard the Atkins' is

Physics dept. gives more precise teaching. Chemists are generally cheap when it comes to anything physics-related, with double the amount of hand-waving and shortcuts. As you said, vague.

Honestly, one should just read Griffiths. There are also solution manual and errata available online.

Then if one is interested in how chemists use QM (in that voodoo-esque way), one could focus on books about spectroscopy, reaction mechanics(MO-theory) and computational chemistry, where the main actual uses are. These areas are somewhat essential if you want to understand modern chemistry research. Of course you also need other advanced mathematical soykaf like symmetry theory.

There are mainly two ways the chemist approach seems to be voodoo:
1) the chemist knows jacksoykaf about QM and therefore gives incoherent information. Often bad at maths and majors in something easy where one does not need QM.
2) Actually knows so much real quantum chemistry that even a physics student finds it hard to follow because you really don't go that deeply into chemical applications in physics books. This type is way more rare, majors probably in physical chemistry and is generally a wizard. Still secretly wishes to understand more physics.

  No.924

Rebumping this thread with a request for some books on theoretic physics as a whole, rather than the focus on quantum physics.
Like OP, I'm looking for a broad introduction to the layman. All I know is some basic Classical Mechanics (high school stuff). I already know basic calculus and how to handle vectors (though I don't know any vector calulus).
Thanks a lot



File: 1485907451331.png (20.79 KB, 300x253, arteres_coronaires.png)

No.783 [Reply]

Any medicine student here ?

Share stuff you find to be interesting, impressive, or even funny. It can be anything from phatology, biology of the cell, to anatomy, including biophysics, biochemistry, pharmacology, etc, as long as it has some connections with medicine.

Just some little rules tho :
- Obvisoulsy, if you have to post gore, please don't forget spoilers.
- Let's try not to complain about how hard studying medicine can be. Let's talk about pure medicine stuff and not the things that gravitates around our student lives.

I personally am not really advanced in that domain, but so far I find it funny that the heart still has to be vascularized via coronary circulation. To me it sounds like a wind turbine generating electricity and using a part of it to function.
12 replies omitted. Click reply to view.

  No.983

>>927
lern thru pain baguette

  No.986

File: 1490292797680.png (110.87 KB, 127x200, otological intubation.png)

>>927
dont try to do this (it doesnt work)



File: 1475852675365.png (223.04 KB, 300x192, memeistry.jpg)

No.9 [Reply]

Chemistry General

Post pictures, papers, or discuss whatever you're working on.
23 replies omitted. Click reply to view.

  No.922


I hate doing TLC. It always fuarrrks up. Also organic redox stoichiometry is such a hassle.

I'm also conflicted about choosing a chemistry oriented education VS computer science. I like both, although I absolutely don't wanna do medicine or anything biology related in chemistry, which seems to be a focus. And computer science I can pretty much study on my own and get a programming job.

I need moar input Lains.

  No.926

>>922
I know someone doing a combined math/chem degree. She claims that the math aspect is harder, but helps *a lot* with understanding chem.

With a CS+chem degree you can probably get all the fancy jobs doing protein folding modelling or whatever.



File: 1489147140447.png (15.9 KB, 250x177, 250px-Wilson1900Fig2.jpg)

No.932 [Reply]

I am interested in biopunk and biohacking since last month, so I had the idea of studying biology at home (I already study philosophy and programming). Maybe I will truly like biology, or maybe not.

I am more interested in bioengineering, biochemistry and microbiology. Is there any website that is good for learning?

Sry for bad english, it's not my native language. Thanks!
4 replies omitted. Click reply to view.

  No.937

File: 1489184186050.png (96.71 KB, 200x200, cool_image_colored_proteins.jpg)

>>936
i know anon, our uni always brings that thing up when it tries to promote itself.
Honestly, i never though about applied biology too much, but i understand it purpose, to me, biology itself is so fuarrrking fascinating.

  No.938

File: 1489193288547-0.png (193.81 KB, 200x131, met.png)

File: 1489193288547-1.png (5.59 MB, 213x300, prot.pdf)

i don't want to discourage you but you should know there's an important difference in studying biology and other fields. think of it as a comparison between biology and something like cs; you can be an expert software engineer without knowing anything about networking or graphics, or an expert data scientist without knowing about crypto or hardware architecture. the beauty of cs is that with relatively little base knowledge, you can dive into a discipline and learn without too much fuss, given that other elements from other disciplines are either irrelevant or abstracted away. fundamentally you can still approach biology the same way, but the base level of knowledge you'd need is a lot greater; at the very least you'd need a reasonable grapple on (organic) chemistry, histology, cell ultrastructure, physiology, biochemistry, and (lots of) metabolism (and in most cases genetics/genomics and immunology as well) before you'd be able to tackle those disciplines.

having said this, it's definitely still accessible in terms of learning curve, and a solid outline of the important stuff is enough to get by with most areas of biology if you're just passing through (pic related, obviously no single person is going to be acquainted with every human metabolic pathway); the only thing to be wary of is the quantity of material. another thing is that, in contrast to something like cs where you often learn something by doing it yourself, there's obviously none of that in biology (except for applications like PCR and gel electrophoresis, still pretty niche), so if you rely on that style of learning to avoid absorbing knowledge by poring over text you may have a harder time here.

in terms of recommendations i'd start with a high-school textbook and make sure you're alright with the breadth in that, then move onto something substantial. stay away from uni textbooks, the detail is overkill especially if you want to differentiate ASAP. i'm afraid i don't have a lot but i got pretty good mileage out of this:

https://www.gceguide.xyz/files/e-books/a-level/Cambridge%20International%20AS%20and%20A%20Level%20Biology%20Coursebook.pdf

and talking of PCR reminds me of this protocol cheatsheet i need an excuse to scan, here's probably a good a place as any to dump it



File: 1489678553541.png (246.47 KB, 300x190, xenomorph.jpg)

No.960 [Reply]

If humans never landed on the Moon, then why is Elon Musk pushing Mars colonization? Musk's a smart guy, so I'm guessing he knows the Moon landings were fake.

http://centerforaninformedamerica.com/moondoggie/

Is Musk setting up a ruse for a different, top-secret, Earth-based project? (a la Manhattan Project-tier) Therefore needs to suck in gullible volunteers who think they will be sent on a heroic, barrier-breaking, space mission?

Is human space travel and space colonization beyond the Van Halen belt even POSSIBLE? With any tech and raw materials that might feasibly be available for us Earth-dwellers now or at any point in the future (even the far future AKA >10,000 years if we don't obliterate ourselves with global nuclear war, Monsanto GMO caused pandemic that wipes out the genetically cloned food supply, or global warming first)?

https://www.youtube.com/watch?v=n0svuurLibQ
1 replies omitted. Click reply to view.

  No.963

Musk is a con man.

>Is human space travel and space colonization beyond the Van Halen belt even POSSIBLE? With any tech and raw materials that might feasibly be available for us Earth-dwellers now or at any point in the future


Yes, it is.

  No.965

File: 1489771245616.png (52.68 KB, 162x200, benis crash.jpg)

>>962
OP here

WRT the link, I would encourage you to give Wagging the Moondoggie at least one quick skim-through, in good faith

Even if McGowan's reasoning does not sway you, his writing style is top-tier and legitimately humorous (in the jolly, hearty belly laugh kind of way).

Although, tbh, McGowan's reasoning and his thorough breakdown of all the holes and inconsistencies in the official story are pretty airtight and logically sound.

>So, even if you assume that we didn't manage it yet, we will definitely be able to go past the Van Allen belt in the future, and before 10k years.

I sure hope so, before we get BTFO in a global nuke war happening.

Alternatively, is it possible that some remote place like DPRK (north Korea), Islamic Republic of Iran, DRC Congo, Papua New Guinea, the Amazon, some Pacific island, Siberia etc. might have a natural fallout barrier? A la some gigantic underground cave system that's many kilometers deep and wide, with fresh water sources, ample greenery, high oxygen, and some kind of aquatic food like shrimp or meaty worms/grubs or prawns or such?

A place like that which might potentially be safe enough to live in long term (multiple generations) in the event that the USA decides to launch all those ICBM's it has aimed at China and Russia?


>>963
>Musk is a con man.
What's he conning for tho? What's his real objective?

What's his endgame?

Is he, dare I say it, /ourguy/?



File: 1476407269289-0.png (55.62 KB, 283x300, 1454657839252.png)

File: 1476407269289-1.png (1.95 MB, 300x300, tumblr_nyve1sLacQ1txe8seo1_500.gif)

File: 1476407269289-2.png (1.71 MB, 300x300, tumblr_o410ubnCsa1qabbyto1_500.gif)

No.97 [Reply]

This thread is for science and math related gifs or pictures.
Also you can post some abstract stuff.
16 replies omitted. Click reply to view.

  No.989

File: 1490307911306.png (72.48 KB, 148x200, 123456789 .png)

What is the name for Sierpinski triangle for decimal?
How may I name it if I find something noone knows?
How do I find out if something is known or not?
Doesn't science keep an accurate register for everything?
How do I find a database where all abecedaria are kept?
If such things do not exist how do I create them? Let us create them!

  No.1004

File: 1490898751056-0.png (566.42 KB, 200x161, D&Ninhp2001.jpg)

File: 1490898751056-1.png (885.77 KB, 200x113, debroglie-bohm-visualized.gif)

File: 1490898751056-2.png (1.91 MB, 200x125, permutotile2.png)

I just want a qτ/2 gf to crochet me a hyperbolic blanket to cuddle with.