-  [WT]  [PS]  [Home] [Manage]

  1.   (new thread)
  2.   Help
  3. (for post and file deletion)
/sci/ - Science, Technology, Engineering, and Mathematics

Join us in IRC!

•This is not /b/ or /halp/. Tech support has its own board.
•If you are not contributing directly to a thread, sage your post.
•Keep the flaming at a minimum.
•Tripcodes⁄Namefags are not only tolerated here, they are encouraged.
•We are here to discuss sci-tech, not pseudoscience. Do not post off-topic.

•♥ Integris

  • Supported file types are: GIF, JPG, PNG, WEBM
  • Maximum file size allowed is 5120 KB.
  • Images greater than 200x200 pixels will be thumbnailed.
  • Currently 412 unique user posts. View catalog

  • Blotter updated: 2011-01-12 Show/Hide Show All

There's a new /777/ up, it's /gardening/ Check it out. Suggest new /777/s here.

Movies & TV 24/7 via Channel7: Web Player, .m3u file. Music via Radio7: Web Player, .m3u file.

WebM is now available sitewide! Please check this thread for more info.

Anatomics design YoungDaVinci 15/07/24(Fri)22:11 No. 16175 ID: 9ea0ae [Reply]

File 143776867759.jpg - (8.68KB , 275x183 , hand_3.jpg )

Hi to all engineers and designers which can help me, and I think doctors too.
I'm a guy which wants to design the most near to a reality hand just with wood pieces and syringes as hidraulic bomb.
I want to do this for my own and knowledge and becouse in the future i want to become and ortopedic engineer.

If anyone can help, please post drawings and sketches of the design of the wood and syringe hand.

Anonymous 15/07/25(Sat)06:35 No. 16176 ID: ca3ceb

I just drew up some sketches and plans for the hand but decided to patent it for myself.

Anonymous 15/06/17(Wed)01:17 No. 16131 ID: f0a18c [Reply]

File 143449664180.jpg - (36.78KB , 279x401 , Anatomical_Male_Figure_Showing_Heart,_Lungs,_and_M.jpg )

Does anyone know the estimated total length of veins in the human body ? And I'm not looking for that 60K miles trivia shit that counts all the capillaries. I just want the actual veins.

2 posts omitted. Click Reply to view.
Anonymous 15/06/22(Mon)13:13 No. 16145 ID: f5d0cf

>>16144 is right, things we define as postcapillary venules are no different from capillaries except a widening lumen.

Anonymous 15/07/04(Sat)02:27 No. 16170 ID: 325d67

File 143596962555.jpg - (43.99KB , 460x573 , nature fact.jpg )


Anonymous 15/07/11(Sat)11:39 No. 16172 ID: 18b905


At first I was going to say that the first couple of miles of elephants that are still in Earth's atmosphere wouldn't die because they can breathe, but then I remembered gravity is a thing.

And because of gravity, almost all (any of them that don't fall to the moon) of that column of elephants will immediately collapse downward toward the Earth onto those other elephants and then onto the ground in a giant puddle of elephant slop.

Anyway, the distance between the Earth and the moon is 238,900 miles, and the height of an average African elephant is about ten feet. So there are 126,139,200 elephants between the Earth and Moon. Anyway, the point of approximate neutral gravity between them is at 211,266 miles from Earth. Therefore, 111,548,448 of them will fall to Earth. The total weight of all those elephants is about 501,968,016 tons.

Using some questionably accurate ratios of masses of large asteroids related to their volumes, I estimate this huge weight of elephants would be about equal to that of a rocky asteroid of a size of 0.4 cubic kilometers, or about 0.75 km across.

So if the weight of all those elephants somehow compressed into a small dense sphere on the way down and hit the ground at once, it would release enough energy to equal about 16 gigatons of TNT.

Suffice it to say, all those elephants would be dead, seeing how they would be vaporized.

Anonymous 14/09/20(Sat)07:30 No. 15881 ID: ea642d [Reply]

File 141119101067.jpg - (5.84KB , 300x168 , aw.jpg )

should i get a mac book pro or a window for computer science?

42 posts and 3 images omitted. Click Reply to view.
Anonymous 15/05/28(Thu)01:09 No. 16116 ID: 1efc37

File 143276814677.jpg - (16.13KB , 340x340 , 1432568999360.jpg )

Install Gentoo

Anonymous 15/06/11(Thu)23:01 No. 16126 ID: 10d6c2

OP will have graduated with a 4 year degree before this thread stops getting bumped.

Anonymous 15/06/20(Sat)01:12 No. 16133 ID: 5205a5

using a mac is like driving a car with only one pedal.

Engineering a propective engineering student 14/05/02(Fri)14:27 No. 15644 ID: e50735 [Reply]

File 139903362912.jpg - (191.61KB , 604x2507 , Posture-at-Work-Infographic1.jpg )

What do you think is
1) the best major in engineering
2) the best sector in engineering
3) the best position in engineering
-starting salary
-mid career salary
-job satisfaction
-future developments

For example: I am thinking about studying petroleum & resource engineering (but I might have the option to study medicine).
It's well known petroleum engineering has high starting and mid-career salaries. Like many other engineering degrees, many students fail. There is job security, but it is very much dependent on the prices of resources and there are some concerns about the demand and supply of resources such as gas and oil in the future. For the most profitable jobs in the sector you have to work hard and make long days, often far away from home. Working for the bigger oil and mining companies, benefits can be exceptionally good. However, placement for these positions can be very competitive.
Message too long. Click here to view the full text.

2 posts omitted. Click Reply to view.
Anonymous 14/05/06(Tue)10:13 No. 15647 ID: aaad3e


Well it's not like there's any incentive for great scientists to spend their time here. There's science forums for serious discussions, and sites like this: http://hypothesisdatabase.capitalistscience.com/ for participatory scientists.


I avoid replying to threads - in case someone actually follows my advice. I think my code might have changed or whatever too. I guess I'll find out after posting.

I barely post threads anymore either.

That being said, I will answer this thread.

For future reference, anyone reading this would probably expect you to do the research yourself.

If best = optimizing for the things you want to consider in the order that they are posted, well...actually let's just optimise for starting salary since I never learned how to do multi-criteria decision making.
Message too long. Click here to view the full text.

Anonymous 14/05/06(Tue)21:42 No. 15649 ID: b957e5

>I avoid replying to threads - in case someone actually follows my advice. I think my code might have changed or whatever too. I guess I'll find out after posting.

I missed the persona of mystery cb9fa8 imbued, yeah, we ripped you/it a little but it was a good laugh at times. It's always good to know you're still here though and don't worry about people listening to your replies, if you tell them to stick their hand in the proverbial fire and they do it... well it's their own stupid fault.

Anonymous 15/05/12(Tue)00:54 No. 16105 ID: b9e6ac

File 143138488992.png - (33.25KB , 1669x937 , Exklusiv.png )

For me, I think biophysics

Anonymous 14/09/18(Thu)21:20 No. 15877 ID: 6cf8dc [Reply]

File 14110680441.png - (519.33KB , 500x692 , tumblr_mzywl5mepF1r7769mo1_500.png )

I got drunk last night and got to thinking... what is stopping lightning from striking houses and tv antennas outside and shit when houses today aren't made with lightning rods?

1 post omitted. Click Reply to view.
Nattajerk 14/10/01(Wed)23:36 No. 15904 ID: ee6591

this ancient device you know as a tv antenna is connected to ground, and provides a clear path for electricity to follow. radio towers are frequently struck for example, the idea is not to avoid lightning but to divert it.

so, in essense, nothing is stopping lightning from striking your house. it is rare, of course. trees, taller buildings, etc will take the most risk of being struck, but having your property struck is certifiably rare by comparison.

Anonymous 15/05/08(Fri)03:13 No. 16099 ID: ef611a

File 143104759244.png - (1.96MB , 1920x1080 , Bowie the-prestige.png )

> ''I got drunk last night and got to thinking...''
..because anon "gets to thinking" after alcohol is applied.

Also, lightning is an electro-magnetic current which leaves the surface of the Earth enroute to discharge in the Ionosphere; where the Extraterrestrial Species (we can lightning) breeds, votes, pays taxes, and smells like music.

Anonymous 15/05/08(Fri)03:47 No. 16102 ID: aef4a9

>lightning is an electro-magnetic current which leaves the surface of the Earth enroute to discharge in the Ionosphere; where the Extraterrestrial Species (we can lightning) breeds, votes, pays taxes, and smells like music.

And in that crazy lies a hint of truth:
Lightning does occur because electrons are being pulled into the sky. Electrons accrue during the collisions between water droplets and ice crystals in the sky and these displaced electrons leave behind a field of negative charge in the atmosphere. Once the charge reaches significant levels lighting occurs. What's actually happening is the electrons are being forcibly removed from particles creating plasma ions in the process. These ions are then drawn upwards to neutralise the charge.

Think of it like sticking a vacuum cleaner hose on the sand, the sand is the charge being drawn up and the hose is the bolt we see descending into it.

trying to understand the weather Anonymous 13/06/27(Thu)13:36 No. 15166 ID: cb9fa8 [Reply]

File 13723330043.jpg - (152.36KB , 800x562 , tw.jpg )

why are some cold and warm front bumps shown to be on one side on the same string and then on the other side on the second half of the string?

3 posts and 3 images omitted. Click Reply to view.
CandleJack 13/07/04(Thu)02:09 No. 15178 ID: 2f260d

File 137289655183.jpg - (19.33KB , 496x548 , Cyclone.jpg )

It looks like it's going anti-clockwise to me.

Anonymous 13/08/22(Thu)02:50 No. 15264 ID: 5f92fc

That's because you're looking at it the wrong way. When you see a cyclone from the top, you are seeing where it is releasing the air that it sucks up. Thus, the direction of reference is traveling outward from the center along the spiral, not inward.

Anonymous 15/05/08(Fri)03:42 No. 16101 ID: ef611a

File 14310493417.gif - (970.24KB , 500x500 , electro magnetic waves.gif )

your question was answered on the KING-5 TV weather blog.
See the definition of electro magnetic waves on the page: "slow moving weather patterns".

Iphone 4 WiFi Anonymous 13/08/15(Thu)13:01 No. 15254 ID: 891cdd [Reply]

File 137656449432.jpg - (78.47KB , 592x444 , 6TNTO2-HETQUY-GKEVLW.jpg )

Now I'm not going to go into much detail but my IPhone was in a microwave for 4 seconds. Everything Works except for GPS and Bluetooth
I dont care much for GPS and Bluetooth, I only really need WiFi.
The problem is I have to be holding my phone right next to my/a router for it to pick up anything.
I have opened up my iphone and checked the EMI sheild. All the screws are tight and there is a solid connection to the logic board.
If I replace the EMI shield would my WiFi be restored? Or am I stuck like this forever?
Any help is greatly appreciated. Thankyou
IPhone 4 (GSM Model:A1332) 6.0.1 Jailbroken

3 posts omitted. Click Reply to view.
Anonymous 13/08/20(Tue)21:06 No. 15262 ID: 2781f1

Fell for the IPhone charges in 1 minute in the microwave, huh? Lmao

deadbabies!rfBia8M6N2 13/08/30(Fri)15:58 No. 15290 ID: 57e7cc


Couldn't you unjailbreak your phone and bring it back to apple and have them repair it? I thought they had a warranty period where they would repair stuff like that for free. If nothing appears to have been damaged by you, I don't see why they wouldn't replace it.

I wouldn't bother replacing the EMI shield if it's whole and undamaged. What more likely happened is what was said
here. Basically, something arced to a component and fried it, and you are lucky to have it work at all. Does the mobile/cellular network still connect?

To me, it sounds like the antenna or the antenna's connection to the phone is fried. You could try replacing it, but there's no guarantee it will work.

Try pressing the area where your antenna is down into the phone with the back cover open, then attempt to connect from further away. If this works, it's most likely a problem with the antenna's connection.

In truth, I have no idea about iPhones, but that's what I would try if I had this problem with my phone.

It's too bad there's not a USB port on the iPhone to allow you to add an additional WiFi device. Too bad Apple hates USB.
Message too long. Click here to view the full text.

Anonymous 15/05/08(Fri)03:31 No. 16100 ID: ef611a

File 143104866550.jpg - (421.90KB , 2592x1944 , year denis.jpg )

I don't think this is true, but...
My neighbor's cousin's school-teacher's dentist's pool-boy's garbage-man's mom said that: "When an iPhone (or iWatch) is put in a Metal-bag of water and nuked in the microwave for 2.3 minutes, it will come out glowing in the dark for 3.2 days and smells like how cookies smell on the skylab that orbits around Mars." But I don't trust denists, so...

Anonymous 15/02/06(Fri)21:17 No. 16041 ID: 6a51a1 [Reply]

File 142325383210.jpg - (59.00KB , 640x453 , Trim_hedge,_neat_lawn_and_a_bench_-_geograph_org_u.jpg )

We mow our lawns to make them look like they're being grazed on.

In caveman times, long wild grass in a territory would have been a sign that it isn't occupied by grazing animals.

We've evolved to find short, neat grass the most attractive as it signals the presence of herds of grazing animals we can hunt.

What do you think?

8 posts and 1 image omitted. Click Reply to view.
Anonymous 15/03/10(Tue)07:03 No. 16073 ID: 4c6193

We mow the lawn because bugs live in tall grass, moron.

Did you have a dad? He should have taught you this shit.

sage 15/05/04(Mon)14:39 No. 16096 ID: cd291a

actually pokemon live in tall grass if you grew up with a gameboy you would know this

Anonymous 15/05/05(Tue)04:49 No. 16098 ID: af3d3e

We didn't evolve in to this, fellow. It's a matter of taste. We were shown by the media that is preferable to have a neat low lawn so that's why we do it.

Have we or will we evolved to structure our thoughts on what the media puts forth is another thing. I think so, men and women who don't listen to the TV won't have kids and thus people will be predetermined to check out sensationalism that rots you brain.

EXTREME SMOOTH Airbus A380 Landing! Anonymous 14/12/18(Thu)01:06 No. 16002 ID: cd6139 [Reply]

File 141886117141.jpg - (1.60MB , 3264x2448 , image.jpg )

EXTREME SMOOTH Airbus A380 Landing! I never see something like this. If you have more videos like this please post them.


Anonymous 15/04/08(Wed)05:19 No. 16083 ID: 380e67

The discussion under it is interesting...

Anonymous 15/05/03(Sun)21:45 No. 16095 ID: 34c1c6


it wasn't that smooth. ive done better i MSFS 2009

air core filter symbol nonoubizoniss 15/05/02(Sat)14:40 No. 16094 ID: b4ba8f [Reply]

File 143057040162.gif - (13.08KB , 565x513 , cienci97.gif )

I'm redrawing a poorly drawn schematic. most of the components are drawn the way they look and not as the symbol. also I'm not sure of the names. is an air core and a iron core filter a air/iron core inductor? if not what dose the symbol look like? BTW a Google image search was more confusing than helpful.

Anonymous 15/05/14(Thu)09:44 No. 16109 ID: bc1020

"filter" might be a coil with/out the ferrite core

Delete post []
Report post