Leave these fields empty (spam trap):
You can leave this blank to post anonymously, or you can create a Tripcode by using the format Name#Password
[i]Italic Text[/i]
[b]Bold Text[/b]
[spoiler]Spoiler Text[/spoiler]
>Highlight/Quote Text
[pre]Preformatted & Monospace Text[/pre]
[super]Superset Text[/super]
[sub]Subset Text[/sub]
1. Numbered lists become ordered lists
* Bulleted lists become unordered lists


420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated July 26)

Fuckin Minerals

View Thread Reply
- Tue, 07 Aug 2018 01:29:22 EST dl9lAnzN No.79190
File: 1533619762885.jpg -(386783B / 377.72KB, 955x861) Thumbnail displayed, click image for full size. Fuckin Minerals
Need some help guys. So for ???? reasons I'm making a program that models geological systems and mineral formation. Does anyone know of a good source of information on the crustal prevalence of various minerals? I obviously can't simulate every mineral known to science, but I want to get an appropriate swath.

Much appreshes.
8 posts omitted. Click View Thread to read.
Alice Bommlegold - Fri, 10 Aug 2018 09:27:27 EST 28EjEn0d No.79202 Reply
I don't know if you are familiar with Dwarf Fortress, but the guy who programmed it knows a lot about geology and has already done the same thing you are trying to do. Maybe if you ask him he will show you where to look or maybe even help you.
Edward Cittingway - Fri, 10 Aug 2018 14:52:56 EST dl9lAnzN No.79203 Reply
1533927176929.gif -(237606B / 232.04KB, 640x622) Thumbnail displayed, click image for full size.
Ah thanks but no, those guys are notoriously tight lipped and the complexity of Dwarf Fortress is far beyond the pale of what is necessary or would even be functional for my purposes. Besides, at this point Dwarf Fortress is well studied within the gamedev community and it's easy to get references about how it works without having to bother those two guys.

Definitely though what I am working on has some broad similarities in terms of making a world simulation that leans on emergent properties, but I'm basing it on real world science and chemistry rather than fantasy. Instead of 'mine 5 generic shits and 5 dire poops to craft 1 epic turd' it will be 'collect 75 kg water, 25 kg bacteria, 5 kg protein and 20 kg sugar to make 100 kg of epic turd'

Earth 2.0

View Thread Reply
- Mon, 24 Jun 2019 21:15:40 EST 6GuGraLS No.79474
File: 1561425340761.jpg -(226587B / 221.28KB, 1300x731) Thumbnail displayed, click image for full size. Earth 2.0
Let's discuss how we could update and redesign our global infrastructure and cities, as well as building new ones, in order to better utilize the latent global energy available. Thermal/kinetic/wind/water/solar energy into electricity, and built into our infrastructure and cities. Can we utilize biotechnology? Nanotechnology?

>What would be the hardest parts of this process? It is too costly to redesign the old? Should we just build elsewhere? Maybe even in space or other worlds?

>What should these new infrastructure/city designs be like? Are there certain geometries or naturalistic patterns we can mimic to make our structures more efficient at weight bearing, flexibility, etc? Something out of Stark Trek or the Venus Project? The word "ecopotia" comes to mind here.

>Can it be done before we succumb to environmental collapse in the next 10-100 years?

>What will have to be changed socially, culturally, economically for these changes to make a meaningful lasting impact on our world for the better?

Try not to be assholes in this thread, let's get some good ideas going, show us /stem/'s got what it takes. SLAYER
3 posts omitted. Click View Thread to read.
Doris Commerchitch - Fri, 05 Jul 2019 03:46:37 EST YxLq1TDJ No.79482 Reply
Centralize populations into super cities that are as environmentally friendly as possible eg. Urban forests. Let the Flora & the Fauna regenerate. What does it require? Humans wanting to live together & not in there area of choice. Also all countries working together. So take that as an easy or a hard thing.
Caroline Pimmerfud - Fri, 05 Jul 2019 17:57:11 EST Jip0VezS No.79483 Reply
I like this idea a lot. Eliminate suburbs, but make cities VERY livable. Good mass transit and walkable neighbourhoods. You need good quality, accessible housing stock and good parks everywhere.
Hedda Fablingshit - Tue, 09 Jul 2019 14:38:28 EST ISfiqZPW No.79485 Reply

the obstacle here is that our society is governed by corporations and states not by human interests

The sound of mathematics

View Thread Reply
- Wed, 19 Jun 2019 00:47:30 EST Dm5a4wRL No.79458
File: 1560919650905.jpg -(84380B / 82.40KB, 640x360) Thumbnail displayed, click image for full size. The sound of mathematics
Annon how do you think the sounds that were created with the help of mathematical formulas affect a person ?


9 posts and 4 images omitted. Click View Thread to read.
Alice Guckletere - Sat, 29 Jun 2019 21:25:07 EST kw9+2JdB No.79478 Reply
Yes! Music follows mathematical rules. Every form of art and medium of expression follows some sort of rules. Sculpture is affected by materials and tools and the properties of those. Cooking is chemistry.

Music isn't just maths in the time signatures but in the notes. Any given interval has the same ratio of frequencies. Every time you go up an octave it's always twice the frequency, 7 semitones down is the same fraction whatever the note it's down from. Every instrument's tuning is about making it vibrate. A good musical instrument is a feat of engineering and precision.

That said you can still break out from normal musical notes. The maths and science of music just gives you a reliable toolset with predictable results that allows you to mesh your ideas with other musicians and instruments using the same language. With any form of art knowing the rules lets you understand how to translate actions into outcomes, not what you should feel or what you should make.What you do with or without this framework is where the art is.
Ebenezer Murdfield - Sun, 07 Jul 2019 19:05:00 EST 9ZEZotI7 No.79484 Reply
There are ways of creating music mathematically by using algorithms. Also machine learning and pattern recognition has allowed for genres of music to be analyzed such as classical music. All the rules, scales, etc. are then used to construct new pieces of music that are indistinguishable from something a human wrote.

As an electrical engineer, what I really find fascinating is the relationship between the Time Domain and the Frequency Domain. In particular the Fourier Transform and implementing it in algorithms such as the FFT. With the FFT you can deconstruct an audio signal in time into its constituent frequencies and plot their amplitude on a graph. Essentially being able to look at any waveform with respect to time and being able to determine the frequencies that make up that waveform. That shit blows my mind and you'll find some awesome stuff online about it. Fourier Series animations are pretty trippy.

I also just found this Wolfram site that allows you to generate random pieces of music following some user customizable rules. Tones.wolfram.com


View Thread Reply
- Fri, 26 Dec 2014 02:34:37 EST 5BjIx1Ou No.75944
File: 1419579277601.jpg -(80538B / 78.65KB, 720x960) Thumbnail displayed, click image for full size. Light
Is it visible without anything to reflect off of and if you cannot see the source of it? I'm in a room lit only by the computer monitor, waiting for someone by my open window at night and the thought just randomly occurred to me and I thought I'd hear your guys' thoughts on the subject.
6 posts and 1 images omitted. Click View Thread to read.
Angus Novingstone - Sun, 13 Dec 2015 16:35:02 EST u8+Bwmjx No.77431 Reply
or just ya know, use a half reflective plate that way some light passes through anyway
Molly Sabbercocke - Sat, 02 Jan 2016 18:31:11 EST 5xtVf077 No.77490 Reply
1451777471784.gif -(2090770B / 1.99MB, 500x335) Thumbnail displayed, click image for full size.
Not so fast!
This isn't completely wrong.
If you could build a box out of PERFECT mirrors
If you could keep the mirrored box from losing ANY energy over time...
then following troll's procedure would result in
the input light bouncing around ~forever
However, you could never use the light for anything for anything or observe it, since doing so would consume the meager amount of energy stored by the endlessly reflecting photons.
There is an electromagnetic component to this as well, but I'm pretty sure that a PERFECT mirror keeps reflected radiation from losing energy due to electric or magnetic forces.
Given, perfect mirrors don't exist, and likely never will... however with really fucking good mirrors you could get the light to hang around for longer.
Cooling the entire setup to nutsack shattering levels would help with duration as well.

Any way to extract mitragynine from kratom?

View Thread Reply
- Tue, 13 Nov 2018 17:24:30 EST pv6fN59z No.79275
File: 1542147870232.png -(3583B / 3.50KB, 269x187) Thumbnail displayed, click image for full size. Any way to extract mitragynine from kratom?
First off I'm not a complete noob asking if adding hydrogen peroxide to kratom leaf makes 7-hydroxymitragynine.

I'm basically just wondering if it's even possible to extract 90%+ pure mitragynine from kratom. Would such a thing be possible without chromatography? Simple A/B then chloroform and then maybe specific solvents/PH?
12 posts omitted. Click View Thread to read.
press - Fri, 26 Apr 2019 16:22:33 EST kphkeya5 No.79400 Reply
according to kirt the servers were fucked up by a snow storm and the backup wasnt up to date. but tbh i cant be arsed to reconstruct the time line.
i was just repeating what somebody else posted. i see your point but i suppose employing picrate to precipitate alcaloids comes from the same time where you had to spend multiple years to describe the structure of a molecule. not to shit on indian or indonesian publications

don't know if this is the right place to do so but can someone explain these?

View Thread Reply
- Mon, 10 Jun 2019 14:41:21 EST NRmhCwT/ No.79448
File: 1560192081864.png -(19763B / 19.30KB, 646x565) Thumbnail displayed, click image for full size. don't know if this is the right place to do so but can someone explain these?
Caroline Copperwater - Mon, 10 Jun 2019 14:42:05 EST NRmhCwT/ No.79449 Reply
1560192125864.png -(16300B / 15.92KB, 645x459) Thumbnail displayed, click image for full size.
Caroline Copperwater - Mon, 10 Jun 2019 14:43:35 EST NRmhCwT/ No.79450 Reply
1560192215864.png -(23299B / 22.75KB, 654x716) Thumbnail displayed, click image for full size.
Polly Clavingnack - Thu, 13 Jun 2019 15:08:38 EST Zmz7NC7L No.79453 Reply
if you can't figure this one out then there's no hope for you tbh, i literally just looked at it and found the extremely obvious pattern
probably -5

Women in STEM

View Thread Reply
- Tue, 23 Apr 2019 19:13:04 EST b3zaIvHO No.79381
File: 1556061184766.png -(62871B / 61.40KB, 450x400) Thumbnail displayed, click image for full size. Women in STEM
call em flowers, cause they supported by STEM
6 posts and 2 images omitted. Click View Thread to read.
Nicholas Packleman - Fri, 26 Apr 2019 09:27:51 EST QiRUncgI No.79397 Reply
1556285271081.jpg -(148714B / 145.23KB, 1000x1080) Thumbnail displayed, click image for full size.
>>guess my third favorite prime number?
oh, you ;)
Albert Turveyham - Wed, 12 Jun 2019 01:37:29 EST iodsxG4D No.79451 Reply
>implying being blind is the same thing as having a pussy
Priscilla Fibberchotch - Wed, 12 Jun 2019 09:49:10 EST dMB264Ep No.79452 Reply

>a woman or black or a cripple or nauseatingly ugly

Could this even work as a mdma cousin

View Thread Reply
- Sat, 16 Mar 2019 03:20:33 EST QsIEMZCJ No.79321
File: 1552720833299.jpg -(1059463B / 1.01MB, 2576x1932) Thumbnail displayed, click image for full size. Could this even work as a mdma cousin
Thoughts can this even work as a stable molecule
press - Tue, 26 Mar 2019 14:42:29 EST eWOCLe3q No.79329 Reply
stable under which conditions, like just sitting airtight, dry, at roomtemp. i guess
the phosphoric ester would be hydrolyzed in vivo, so youre basically dealing with methylone with an added phenolic function at the 2 position of the phenyl

most likely active but how active, god only knows unless you can dig up a research paper with the binding constants for several receptors
wiki wasnt too informative on 2'hydroxymethylone/2'methoxymethylone and i know fuck all about QSAR
Edward Hussleson - Sun, 09 Jun 2019 20:21:21 EST 0ZtUa/pQ No.79447 Reply
leave that goose alonoe

Do STEMfags have anything at all between their ears?

View Thread Reply
- Tue, 09 Apr 2019 00:44:49 EST AtxvGGY2 No.79348
File: 1554785089240.jpg -(6798B / 6.64KB, 268x188) Thumbnail displayed, click image for full size. Do STEMfags have anything at all between their ears?
The STEM meme has been floating around for so long now that the people who associate themselves with it have a track record of behavioral patterns to analyze. One common behavior of the typical STEMfag is to loudly proclaim that they're more intelligent than those people who study the humanities and the evidence they provide of this is always someone else's achievement, usually the achievement of someone like Issac Newton who was an extensive studier of non-STEM topics and was able to achieve insight by not being a closed minded know-it-all. What is it about the humanities which upsets STEMfags so much? Why are those cringing cowardly sissies so frightened by things that can't be directly quantified? It seems so lame.
17 posts and 8 images omitted. Click View Thread to read.
Charles Blopperway - Wed, 05 Jun 2019 20:24:08 EST zigV4Iei No.79445 Reply
no one person could possibly have lived up to the absurd comic-book supergenius reputation that einstein and other "famous" scientists like stephen hawking have painted for themselves. not even gauss, newton or socrates. if you need anecdotes to back up this claim they can be supplied, therefore the ball is now in your court to prove me wrong.

Why is this the case?

View Thread Reply
- Thu, 25 Apr 2019 01:23:27 EST bUpRMfRf No.79388
File: 1556169807858.jpg -(63514B / 62.03KB, 700x538) Thumbnail displayed, click image for full size. Why is this the case?
I've been enrolled in a Trigonometry course this semester and I have been enjoying it. I also think the main Pythagorean theorem is one of my new favorite equations, but I just don't understand one thing. Why is the result of the expression equal to one?

sin²β + cos²β = 1

We've learned about "proves" where you try to arrive to the answer by choosing the busiest side and in this case the left side, but how would you go about proving this specific this? I heard that more advanced math knowledge was needed (e.g. Calculus) but is that really true or can this be proven using what is learned in Trigonometry itself?

Also, in other Trig courses, do instructors actually assign this expression as a homework question all to itself? I thought this was just a formula given to help solve problems and not an actual problem.

I also recently learned that Pythagoras was a philosopher and even had his own cult. What are some of the other things this man was known for?
11 posts and 2 images omitted. Click View Thread to read.
Betsy Boddleshaw - Fri, 03 May 2019 16:45:56 EST QiRUncgI No.79410 Reply
The allegory of the cave is a metaphor for epistemology, I don't think Plato was positing it as a realistic scenario, whereas the simulation argument might be taken for a metaphor about epistemology but primarily positions itself as a realistic explanation for reality. (cf. the Evil Genius argument; Descartes didn't really believe he was a brain in a vat, he was trying to prove a point.)
There really isn't a difference between the way our brain simulates the world and a computer simulation of the world; but that itself, comparing the brain to a computer, is just another metaphor, and largely the product of the repeating phenomenon in the history of science where the rest of the universe is re-contextualized as being 'like' whatever the most important technological advance of the day is (this has happened with everything from fire, writing, and wheels to rail-roads and electricity.)

Not to say that he or Pythagoras couldn't eventually understand the concept of a computer and programming languages, and be able to relate them to how the mind and possibly the universe works, but you would need to educate them about all the stuff that underlies those ideas first. Like, the number zero and real algebra would be the first big things.
Rebecca Sondlestock - Thu, 09 May 2019 09:36:08 EST fBrSG5+b No.79416 Reply
1557408968273.jpg -(106274B / 103.78KB, 786x1017) Thumbnail displayed, click image for full size.

And yet the work of flatland and explanations of dimensions beyond human comprehension are adequately expressed using the allegory of the cave.

I do enjoy that you make the distinction that belief is not relevant to argument. So rarely do people understand that critical nuance.
!scyTheNg3k - Thu, 30 May 2019 18:10:02 EST +fcpEO88 No.79430 Reply
the proof was given correctly above but the dude used latin for some reason.

sine is the ratio between opposite side and hypotenuse. sin(x) = O/H
cosine is the ratio between adjacent side and hypotenuse. cos(x) = A/H

pythagorean theorem: (adjacent side)^2 + (opposite side)^2 = (hypotenuse)^2
O^2 + A^2 = H^2
divide both sides by H^2
O^2/H^2 + A^2/H^2 = 1
(O/H)^2 + (A/H)^2 = 1
by definition
sin(x)^2 + cos(x)^2 = 1

Time warp

View Thread Reply
!cyBOrG7t12 - Wed, 20 Feb 2019 17:56:06 EST 2VxE8R8t No.79306
File: 1550703366347.jpg -(18839B / 18.40KB, 324x418) Thumbnail displayed, click image for full size. Time warp
There was a snowstorm where the servers are. It got so cold that it started to go below absolute zero, resulting in particles moving backwards in time. So here we are.
14 posts and 1 images omitted. Click View Thread to read.
Therm0ptic !cyBOrG7t12 - Mon, 15 Apr 2019 02:07:59 EST Jyqi6ep7 No.79369 Reply
You could be on to something. How do we test this?
press - Mon, 15 Apr 2019 16:24:42 EST kphkeya5 No.79370 Reply
the letters ive written to multiple universities and kirt have yet to be answered. quite shocking if you take into account that the grant i asked for was a mere 1000 dollars (adjusted for inflation during the experiments), which according to my alculations would be the mere minimum to fund a trial. further research would obviously take much less time once the direction of time travel isnt limited to forward and side effects such as pissing myself are minimized. this far ive been able to travel up to 4 days at 1 litre of fuel per day traveled

i suspect mainstream science is supressing work in this field. neil degayass tyson has blocked me on twitter
Therm0ptic !cyBOrG7t12 - Tue, 16 Apr 2019 13:01:06 EST j9C4BMRh No.79371 Reply
Damn. I guess we should set up a Taima University so deep researchers like you can have the lab space and resources necessary for real alcohomploshments in your field.

Long time 420..er but not /chem/ person

View Thread Reply
- Sun, 31 Mar 2019 05:06:11 EST U39B6FlA No.79341
File: 1554023171889.jpg -(36565B / 35.71KB, 440x308) Thumbnail displayed, click image for full size. Long time 420..er but not /chem/ person
I checked out all the boards here as a teen cus there are so many devoted to so much
this chan is the tightest shit

Anyway my guys

I have done LSD and I have grown shrooms
more into the shroom thing
Im really interested in altered states of consciousness
like how the LSD works in the brain
also making it, Im sure this is a very stereotypical post but I really am going back to school and not fucking up (hopefully)
I am good at computers and originally was in-between a degree in art and getting a credential to teach kindergarten
Im good with kids and around 80k a year and grading "the colors"
would be the peak of mediocrity for me and just let me coast and die which sounds nice
I am also decent at computers and thought I could do data science things
BUT I believe I can probs pursue data science and art on my own
& would rather go a little harder and choose a biotech science that involves the synthesis of chemicals
or something that would lead me to nanotech or cyborg shit
I am excited to school I would like to science these are my words please help me
Esther Connerhat - Mon, 01 Apr 2019 21:14:18 EST QiRUncgI No.79343 Reply
Would love to help but not really seeing a question in there. I think like most people at your stage you need to explore your options and really come down on a few possibilities...this is more /qq./ As for trying to synthesize LSD, it's one of the more difficult ones out there, you need advanced practical biochemistry...you probably should try your hand at basic tier chemistry before you can even answer the question of if it's something you would want or be capable of doing.


View Thread Reply
- Thu, 01 Nov 2018 23:24:25 EST wkZjcyRQ No.79273
File: 1541129065535.jpg -(23597B / 23.04KB, 232x325) Thumbnail displayed, click image for full size. /STEM/
Maybe we should have /stem/
4 posts and 1 images omitted. Click View Thread to read.
press !YxHJQHLaEk - Fri, 29 Mar 2019 15:50:59 EST XqaGYEnB No.79336 Reply
maybe stick around to see if it did anything?
i mean
einstein and bohr thought the new understanding of the atom would bring world peace, and then were really sad about something something in japan, when the atomic bomb actually stopped the cold war from becoming hot. thus most of the suffering got diffused by splitting up germany and korea, bombing vietnam, laos and kambodsha with enough bombs to make the whole thing seem like a death cult ritual and further destabilizing the craddle of civilization, as if the first world war didnt do enough damage, by shoving arms up the asses of whatever warlord was trendy. also something in latin america something something
dont get me wrong i still support nuclear energy and am very curious about this /stem deal
Emma Sendershaw - Sat, 30 Mar 2019 05:47:54 EST P9TUG1D8 No.79337 Reply
theres no reason sticking around this site, it was already dying before it went down, but that shit plus the lack of any reasonable backs was the coup de grace.
press !//CEObOMBY - Sat, 30 Mar 2019 12:23:50 EST Xcif41Xj No.79339 Reply
good bye then?
unless yyoure trying to pull one of them jesus "do as i say not do as i do" spiels on me

past time travel

View Thread Reply
- Fri, 30 Nov 2018 15:10:58 EST GtE/9ebI No.79290
File: 1543608658580.jpg -(344271B / 336.20KB, 1024x683) Thumbnail displayed, click image for full size. past time travel
What kind of time traveling technology are we going to have in the future?

200 years ago the best way to view past events was through art, paintings, drawings, or written text.

In the present we all have smartphones that can record audio/video at any given moment giving us an exact copy of the present for viewing in the future. There is also youtube and other major databases of video/audio from the past that is an exact copy of reality at that given time and setting in the video.

What is coming in the future? Is it 10s of thousands of years from now, hundreds? We're clearly going to have something that is just as much of a mind blowing leap as paintings -> recorded video. Are we finally going to be able to communicate and interact with the past in real time?
3 posts omitted. Click View Thread to read.
Jack Wallerfog - Sat, 16 Mar 2019 05:34:50 EST RVtEPlUX No.79322 Reply
recently i read interesting aticle about time traveling
Nicholas Goodlock - Sat, 16 Mar 2019 17:51:41 EST dl9lAnzN No.79323 Reply
Hm maybe this isn't your sci-fi blog?
>>If I were you guys I’d move to Malaysia FAST
What plebian timeline are you from? My crystal ball says dragons will eat all nations except Lichenstein. Howboudah?
C-Higgy !lfsExjBfzE - Tue, 26 Mar 2019 20:01:49 EST 8P8c+L33 No.79332 Reply
Hopefully something with portals, that would be dope.

Report Post
Please be descriptive with report notes,
this helps staff resolve issues quicker.