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/laboratory/ - A Controlled Environment

STEM Discussion


Winner of the 82rd Attention-Hungry Games
/tikilounge/ - Relax, take it easy

June 2019 - 8chan Transparency Report
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Now With Custom Flags!

File: 31e05a3d08fccb6⋯.jpg (598.94 KB, 1000x1000, 1:1, 3081474_1.1000x1000.jpg)

2fe5c3  No.265[Reply]

Welcome to /Laboratory/. This is a place to discuss Science Technology Engineering and Mathematics subjects. We are especially interested in hands on experiment, testing and development. Please understand that the rules and guidelines here are more restrictive than other boards, in the interest of science. Have fun, and contribute.

Rules and Guidelines https://8ch.net/laboratory/rules.html

Rules updated 2018-10-03

Other Boards https://8ch.net/laboratory/allies.html

Allies updated 2018-04-27

Useful Links https://8ch.net/laboratory/links.html

Useful Links updated 2018-08-29

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2fe5c3  No.278


I added yours to our page which contains links to related boards.

>I'd like to help you out some how. but not really sure how we could help you.

The best things a person can do to help us out is to post threads and replies that are relevant to the board topic. You can also mention our board and threads in relevant threads on other boards, and referring to boards and threads outside this one is perfectly fine when it is relevant.

It is our hope that people from various disciplines can have experiments repeated for confirmation, engineering issues explored, and that students and amateurs can learn more about their disciplines from those more advanced.

File: af812b69f5e823c⋯.jpg (118.9 KB, 953x1024, 953:1024, 1557025337942m.jpg)

9e1daf  No.295[Reply]

Hi /laboratory/….I like the mods rules here, seems like a slow board. How about a tech thread? Im interested in the other 3 letters but Im only good at the T

YouTube embed. Click thumbnail to play.

8682fd  No.284[Reply]

Here is a presentation given at a conference about fake publishing.

a7b2ee  No.293

In other words, "humanities"

8a5b3a  No.294

File: 32eef209d0c1406⋯.pdf (5.41 MB, There Is No Case for the H….pdf)


Ha, but no. (PDF related to your comment, but not to mine)

It's concerned with less than scrupulous journals who will publish just about anything and are easily exploited by companies with an agenda, especially pharmaceutical companies, to let their marketing departments make claims like "the results of ten studies show…"

File: 52724a14e0c67a7⋯.pdf (1.31 MB, explaining_logarithms.pdf)

File: 220dfa9a8f3858d⋯.pdf (1.7 MB, Trigonometry Michael Corra….pdf)

File: 3247dc3ce3a13bd⋯.pdf (103.49 KB, Exact_Trig_Values.pdf)

File: c71f09db882cdd9⋯.pdf (2.84 MB, Shop_Arithmetic_for_the_Ma….pdf)

83fd0d  No.269[Reply]

As for actual content let us start off with some nice pdfs. Since math is the basic tool of all science and engineering, it is only fitting to start with a math thread.

2a3689  No.289


Thanks for the pdfs anon I see some stuff that will already be useful. Do you have any stuff that can elaborate on grim trigger strategy or Gaussian elimination of matrices systems? Not trying to sound pretentious but I began entry level Gaussian elimination in my PreCal class in community college and I passed the class but it really screwed me up and busted my confidence.

d17bbb  No.292


I'll look into it but it may take a while. I'm not up on either of those subjects myself.

File: 28612c0fba831d3⋯.jpg (130.18 KB, 1600x1000, 8:5, bg-build-my-path.jpg)

638b8a  No.290[Reply]

Is it difficult to obtain an E.I.T. or P.E.? I feel like out of all my classes there was so much information cramed I only retained like a 10th of the knowledge. Although I'm studying as a supplement at home are there any tips or advice you could give an up and coming engineer?

9b95ef  No.291

File: 6f84aa5b5422233⋯.jpg (403.86 KB, 1000x1500, 2:3, Calculator-TI-30XA-rev2015.jpg)

I can't speak from my own experience, but I've worked in manufacturing for about seven years and I have met an awful lot of engineers (especially aeronautical and mechanical). I have only discussed this with a small handful of engineers (maybe 3, it doesn't come up that often) who got (or attempted to get) theirs and all of them failed at least one of the tests, at least once. Also, in my experience about a third of the people I've met with engineering degrees did not have "engineer" in their job title.

My point is four-fold; 1 - yes a lot of people do fail so take it seriously and be prepared; 2 - you're right about schooling, many aim to pass their classes and don't actually learn what they need to learn; 3 - engineering is not a field that everyone can succeed in; and 4 - some people never get certified and they still have a career.

It sounds like you take this seriously, and have prepared, but even if you don't succeed you can retake the test, and even if you never get your certificate, you can probably still get a good job in a technical industry.

Some things you don't mention are in which branch of engineering you are involved, and in what jurisdiction. Licensing varies somewhat from country to country, and in the U.S. and Canada, from one state/province to the next. In some jurisdictions there is only one license, in other jurisdiction there are different licenses for different fields, and these do vary in difficulty.

Pics related: a calculator permitted to be used on the test.

File: 9f25585bb77d87a⋯.png (7.14 KB, 121x192, 121:192, HowUSit.png)

bb57a3  No.263[Reply]

So where do i go to figure out my future career? I know Tech (Software adn Firmware) is the path for me but i don't know what specialization to go into. Any help?

(Pic unrelated, but how do you sit /labro/s?)

68d291  No.274


Have you already identified any passion within yourself? Anything you feel strongly about doing in specific? Finding some kind of inner drive within yourself will be key to finding a satisfying career anon. Me, I always dreamed of having an artificial intelligence friend so AI is naturally a personal interest I pursue in education and work.

a94feb  No.288


It really depends anon. Some good questions to start with are, do I have connections in high places? Do I want a small comfy firm or a fast paced, usually higher paying large firm, possibly work for yourself? Do you already have credentials like certs., degrees, experience? Just too vague for a proper justifiable answer anon.

File: ffe7cf6fa8c1f95⋯.jpg (165.99 KB, 1000x700, 10:7, 1.jpg)

77727e  No.286[Reply]

A contest my company was running for the best (worst?) lab fails:


b8fe25  No.287


That doesn't look too bad. Just a bunch of molten plastic in the oven/autoclave?

File: ce658f7993867aa⋯.jpg (129.74 KB, 569x384, 569:384, Graham condenser.jpg)

File: f5c94128051c899⋯.jpg (182.72 KB, 1754x2480, 877:1240, Inland Revenue.jpg)

0a317f  No.270[Reply]

As a starter question; what is the proper use for Graham condensers? Some say they are not condensers at all, but heat exchangers for liquids. Obviously when used as a condenser, they ought to be used in the vertical position, and always for distillation rather than reflux. I've heard it said that they are well suited to vacuum distillation, but I do not see how that would eliminate the "spitting" caused by air trapped behind/above the condensate which seems to be the main problem (when used in the vertical position).

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c56575  No.271

File: ab6d72c8ec170ea⋯.jpg (49.53 KB, 411x414, 137:138, Temperature regulating bat….jpg)


I've never used a graham condenser so I can't say for sure.

Temperature regulating baths are good for keeping constant temperature for certain experiments, like when extracting DNA from a sample.

c56575  No.272

File: ff7ac23f9cec155⋯.jpg (25.43 KB, 400x300, 4:3, gas chromatograph.jpg)

I recently read about a gas chromatograph, which can be used to vaporize a sample to determine the chemicals present in the sample. Some of this equipment might be expensive but its something that's nice to have when doing experiments.

0a317f  No.275

File: 43d45c93099da6f⋯.jpg (1.29 MB, 2704x2160, 169:135, Zimbabwe_Hyperinflation_20….jpg)

File: 396b25dfc0c6a6a⋯.jpg (18.15 KB, 200x200, 1:1, 1425479491262.jpg)



Yes very, it is worth pointing out that the average professional chemistry lab is an expensive proposition, and the amateur home chemistry kit is not going to make any groundbreaking discoveries, though a certain amount of practical chemistry is still possible without breaking the bank, and of course has educational value.

000000  No.285

Genetic engineering looks wonderful!

File: 35b890c5159a133⋯.gif (4.15 MB, 610x312, 305:156, exxYcNy.gif)

File: 8ad8396dd22e3b5⋯.gif (4.97 MB, 320x240, 4:3, 66DkAGs.gif)

File: 749ad49dd14a1a7⋯.jpg (94.69 KB, 800x461, 800:461, CincinnatiMillingMachines.jpg)

a89f94  No.283[Reply]

This thread will be a catch-all for all things related to metal working. As a machinist myself, I believe that metalworking is one of those basic technologies upon which all of civilization rests.

File: ee6d63f9a466b57⋯.png (2.04 KB, 227x222, 227:222, disclogo.png)

6d963a  No.276[Reply]

A new server has been made due to the influx of spam in the previous one. We also had a shortage of pracfags. Feel free to join (back):


da3d7c  No.277

For those interested: the above is a discord server with many categorized text and voice chatrooms, I lurk there myself. It has separate rooms for many subcategories of mathematics, some sciences, and a bunch of more general chatrooms.

7d8093  No.281

Either you're illiterate and can't read their "privacy" policy or you really don't care that a fat indian man and any government can see all the pictures and messages you've ever posted and deanonymize you that way. Fuck discord, I only touch that shit with 30 burner accounts and even then you gotta be careful what you say.


da3d7c  No.282

File: 7dde00b3080a3b4⋯.jpg (56.16 KB, 843x680, 843:680, 10917040_10204622145968343….jpg)


You are welcome to do as you please; there is no requirement whatsoever to join Discord in order to participate on this imageboard. You are also welcome to spout your opinion off, but please note Rule 4: Refrain from…ad hominem attacks, and pointlessly foul language. Also note, from among the guidelines: Arguments are better than bare assertions. An argument is defined here as an assertion with supporting evidence. Anonymity is not especially valued here, while we don't need to know your IRL name, some record of who has said what is helpful in keeping straight who is, and who is not an expert in their field. If you are going to spout off, you should do it constructively.

Edit: This was not a long ban at all, and meant mostly as a statement of what is and isn't expected here.

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File: 20b18874b035384⋯.gif (997.27 KB, 500x475, 20:19, 1395900523003.gif)

522393  No.266[Reply]

For the first post-reboot thread I would like to invite those interested to post any graphics they feel would benefit the board. Those deemed worthy will become official /laboratory/ graphics.

Graphics are to be somehow relevant and fit the following sizes:

Banners 300 x 100

Flags 11-20 x 11-16

Spoiler 128 x 128

Deleted File 140 x 50

No file 500 x 500

Backgrounds Can be any size if they are in a repeating pattern, otherwise, as large as possible.

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522393  No.279

File: fea8a422a5c8c8f⋯.png (203 B, 20x16, 5:4, Astronomer.png)

File: 4fa0f5930b1747c⋯.png (295 B, 20x16, 5:4, Chemist.png)

File: 3b0a72b439a8e86⋯.png (242 B, 20x16, 5:4, Electrical Engineer.png)

File: dc33d1e65f3b1b5⋯.png (221 B, 15x15, 1:1, Geologist.png)

File: cafa5208c859b87⋯.png (197 B, 14x16, 7:8, Mathematician.png)

I have uploaded some flags for you all to use if you choose. If you don't see a flag for your discipline, let me know and I'll try to come up with one, or you can suggest an idea or finished flag in this thread.

I'm especially fond of the chemist one, it's cute. o3o

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522393  No.280

File: 66557f7e21b8f5c⋯.png (174 B, 20x16, 5:4, Mechanical Engineer.png)

File: 5a7ea09107540ac⋯.png (223 B, 20x16, 5:4, Physicist.png)

File: c6ac5011b2f47df⋯.png (239 B, 19x15, 19:15, Student.png)


…and here's the rest for now.

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