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/sci/ - Science, Technology, Engineering, and Mathematics

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New Textbook/Book Request Thread deadbabies ## Mod ## 13/08/25(Sun)06:03 No. 15270 ID: f34135 [Reply] Stickied
15270

File 137740339172.jpg - (401.45KB , 1680x1050 , titanfalsecolor.jpg )

First off, hello there, I'm deadbabies, and I will be taking over as /sci/ moderator. Rules will remain the same. Please use the report function if you see posts that violate the rules, but also do not abuse it.

I have officially expanded the scope of /sci/ a bit. You may discuss Science, Technology, Engineering, and Mathematics here now. No science is discriminated against as long as it's of the peer-reviewed variety. If someone wants to discuss Anthropology or Social Science, by all means, let them. If you do not like it, just don't post in the thread.

The IRC channel #/sci/ is now (finally) re-registered and I am running as operator on here. Feel free to stop by and say hi. I do leave my computer idling on IRC, so check back or leave me a message if you have any ideas, suggestions, or just want to tell me off. You can get onto #/sci/ by joining the server irc.7chan.org at port 6667. You can also use SSL at port 6697 but you will have to set your client to accept invalid certificates.

ADDITIONALLY and IMPORTANTLY I have had several requests on IRC regarding the old Ebook FTP that we used to have. Unfortunately, the mod who ran it entered the military and no longer runs or maintains it. I have no plans to make another one, but if one of you guys would like to, by all means advertise here.

That being said, I'm just going to leave this link here:

http://ebookee.org/index.php?tag=7

You may find what you seek here.

I will be unstickying the old ebook/source articles thread. Please post any new ebooks/source articles here, and feel free to post any working links from the old thread there; I will eventually be deleting it.
Message too long. Click here to view the full text.


10 posts and 2 images omitted. Click Reply to view.
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Anonymous 15/07/02(Thu)01:17 No. 16168 ID: 7d0760

anyone have "a first course of quality engineering" to download?




Global Address System: Earth's Surface Divided Into 3x3 Meter Blocks Anonymous 15/09/03(Thu)17:42 No. 16187 ID: 0948b1 [Reply]
16187

File 144129494182.jpg - (3.22KB , 256x144 , global-address.jpg )

http://3millionpage.com/index.php/internet/167-global-address-system-earth-s-surface-divided-into-3x3-meter-blocks




Computer Building Scrub Lord 15/09/01(Tue)19:43 No. 16186 ID: 8800e8 [Reply]

Youtube - Toggle Video
  Hello 7chan! I'm very new to computer building, stats, and products, etc. I have a 2009 hp pavilion that is ok at running games. I ran tf2 at 60fps and I'm looking to use sfm animation tool. I was wondering if I can have any advice on upgradeable parts I could install? I have 530$ US cash now and I could either upgrade my hp or build a gaming pc. Your comments would be very helpful!




Anonymous 14/10/27(Mon)22:39 No. 15950 ID: d126e2 [Reply]
15950

File 14144459653.jpg - (220.71KB , 791x1024 , pornography-791x1024.jpg )

What are the factual negative and positive side effects from watching pornography? I recently did some reading into this and found a lot of articles talking about how the neurons create stronger pathways to the brain from the pleasure reward that comes from watching pornography (much similar to the effects from taking drugs). This can lead to addiction and dependency on this type of stimulus to become aroused. So I come to you /sci, does pornography have a negative effect on the brain?


9 posts omitted. Click Reply to view.
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Anonymous 15/04/17(Fri)04:44 No. 16087 ID: 9bb934

I started masturbating to porn at about the age of 11 regularly. The only thing that works for me anymore is my imagination and actually being with a real girl.


>>
Anonymous 15/07/04(Sat)03:02 No. 16171 ID: 325d67

There is a ted talk that discusses this topic called The Great Porn Experiment


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Anonymous 15/08/17(Mon)06:15 No. 16185 ID: 56cebc

>>16081
Ah, camaraderie. Good sex analogy there.




Homosexuality, could it be an anomaly in brain developement? Dr. Nick Riviera 15/02/05(Thu)04:59 No. 16039 ID: 8ec688 [Reply]
16039

File 14231087868.png - (64.35KB , 320x307 , Dr__Riviera.png )

Hi guys, to begin I just want to make a couple of things clear.

- This thread is NOT about discrimination of homosexuals.
- This thread is NOT about considering homosexuality as disease.
- This thread is for pure scientific discussion.

Well, let me begin by telling you that I'm a med student and a embriology assistant at my university and I'm not a native english speaker, so you may encounter some grammatical errors in the text, but you'll get the point.
This whole dilemma began two weeks ago, when my brother told my family that he is gay. It was quite a shock, not because of the fact of him being gay but because he doesn't fit the gay man stereotype. He's a big dude, loves sports, bearded, the true definition of what some call "manly man". We accepted him, of course, and I have to say I've never seen him happier.
But after a few days I began to think, was he always gay? Did he decided to be gay? Why now? These questions started lingering in my mind. So I went to talk with my him about it.
He told me that he always has been, for as long as he remembers. Nothing has changed about him, except for his sexuality (for us, not for him haha). So that got me even MORE questions. Why are some gay men that are like extremely feminine? Why are some gay women extremely masculine? Why are gay guys like my brother who don't appear to be gay? Why do some gay people feel like they are traped inside the other genders body and need to get medical treatment (sex change surgery, hormone therapy) and why others don't?And why are there women like that too? Why many species, whose main goal is to survive (actually this is every species main goal, it's literally in our DNA), has certain individuals who are the contrary to this?
So I decided to tackle all these matters from a scientific point of view? What if during the development of the lymbic system (the part of the brain which controles emotions, memory, sexual desire, etc.) something doesn't go as it should?
So after I thought of this I told myself I couldn't be the first one to ask myself these questions. And of course I wasn't in a world with 7 billion people so thanks to the magical power of the internet I managed to get a cool text about the subject. I took some paragraphs which I thought were the most interesting, still I'm leaving the link (please don't take the text as discriminatory, it's merely scientific, it refers to homosexuality as an anomaly in brain developement because seen from a medical point of view it is, still doesn't mean it's moraly wrong).

"..the body and the brain first become sexually differentiated at about the third fetal month. Prior to this age, although genetically male or female, the fetus is physically/sexually-neutral. With the formation of the testes, and the secretion of testicular androgen, target ti Message too long. Click here to view the full text.


13 posts and 1 image omitted. Click Reply to view.
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Anonymous 15/08/15(Sat)06:54 No. 16182 ID: b2c2db

Youtube - Toggle Video
  I don't think having sex with things means attraction in that sense

gender doesn't mean much beyond the considered suitable psychological characteristics for a partner whereas their physical traits do matter for most people too (it varies of course)

it's also a falsehood to claim rational actions and thought is separate from instinct on a meaningful level when it comes to how it operates, you only think you're thinking rationally instead of more engaging in a more complex variation of instinctual responses

we *can* separate "thought" and "instinct" for certain purposes but for something like this they're inseparable


>>
Anonymous 15/08/16(Sun)23:51 No. 16183 ID: 18b905

>>16181

Are you implying the homosexuality is hereditary?

Are you fucking stupid?


>>
Anonymous 15/08/17(Mon)00:28 No. 16184 ID: 76c0e8

>>16183
>Are you implying the homosexuality is hereditary?
Are you implying sexual preference is devoid of a genetic component?

Isn't the implying game fun!




Nokia Cutter 14/09/30(Tue)10:08 No. 15900 ID: 91d0e5 [Reply]
15900

File 141206450791.jpg - (18.82KB , 630x420 , nokia-3310-071111.jpg )

Is it even possible to get an old Nokia phone on a modern service provider ? I realized that I never use my iPhone for calling so it would just be better to get an iPod and a different phone. What do you guys think ?


3 posts omitted. Click Reply to view.
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Anonymous 15/05/29(Fri)15:27 No. 16118 ID: b2c2db

there's a lot to be said about it, the problem is it doesn't make a constant profit rolling out, even when someone makes something that can do such a thing it's much rarer, and the companies that sell the phones also often control the networks yes?

need a qualityist movement, there's a lot of stuff that's designed to do it's job and it does it well while lasting for decades, some new stuff can kind of do this, but often it doesn't, there's always a two-tier system, easy to get cheap things and hard to get high quality devices, might as well start a support system for favouring the purchase of the better stuff


>>
Anonymous 15/06/12(Fri)02:33 No. 16127 ID: 625843

>>15900
Depends on the networks that your phone supports and the networks that your carrier offers.


>>
Anonymous 15/08/01(Sat)14:42 No. 16179 ID: 0377cc

>>15900
It works in Finnish network and supports 2G WAP connections.




Anonymous 15/07/26(Sun)20:15 No. 16178 ID: c84a9c [Reply]
16178

File 143793450731.jpg - (80.44KB , 8000x500 , solarsystem.jpg )

i just need to upload this somewhere
that fucking bitch tinypic breaks 8000 wide pics




So, Pluto isn't a planet. Anonymous 15/07/25(Sat)21:37 No. 16177 ID: b3adbb [Reply]
16177

File 143785303060.jpg - (79.57KB , 1024x1024 , lor_0299148119_0x632_sci_3.jpg )

I've got news for your son.

That or its really good CGI and NASA has pocked our billions of dollars.




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

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]
16131

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.
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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.


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

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

>>16132


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

>>16170

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.




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