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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.


14 posts and 2 images omitted. Click Reply to view.
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Solutions Manual to E&M, 3rd Edition by Purcell Anonymous 16/11/19(Sat)00:05 No. 16384 ID: 1ae570
16384

File 147951030462.jpg - (27.55KB , 406x500 , Purcell 3rd Edition.jpg )

Looking for the the solutions manual to Electricity and Magnetism, 3rd edition by Purcell and Morin. The problems are much more difficult and numerous than in the previous two editions, making it one of the best problem books on the subject. Was able to find the solutions to two analogous books in Classical Mechanics:

http://bookzz.org/book/2592413/e67f58

http://bookzz.org/book/2592412/fd6171

Sadly, all my searches for the solutions to the E&M book have been fruitless. It's the last manual that I need to complete my collection.




Ransomware Attacks: How Our Technologies Could Be Affected & What We C Sophie+Wilson 18/04/17(Tue)14:43 No. 16648 ID: bf3a90 [Reply]
16648

File 152396901660.jpg - (95.83KB , 1170x660 , Ransomware-Attacks_0.jpg )

The city of Atlanta, a few months ago, had experienced a ransomware cyberattack that paralyzed its government. The attack had a direct effect on access to government websites causing approximately 6 million people to be affected. There are still ongoing efforts to get these critical systems back online.

https://www.evolving-science.com/information-communication/ransomware-attacks-how-our-technologies-could-be-affected-what-we-can-do-00621




bank account getting drained from hackers Anonymous 17/07/17(Mon)01:09 No. 16526 ID: 030037 [Reply]
16526

File 150024659115.jpg - (32.55KB , 333x360 , serveimage.jpg )

Theoretically, how fucked up would I be if someone used a keylogger on my machine for a few month and leaked my bank account details (online password, PIN, security questions etc) on the Darkweb?

Not worried at all but I just wonder how good these computer hackers are at clearing accounts. Aren't there limits depending on the level of your account? They definitely can get around I.P alerts when accounts are accessed in different countries.


3 posts and 1 image omitted. Click Reply to view.
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Anonymous 17/10/29(Sun)14:48 No. 16571 ID: 7087c4

You'd be fine


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Anonymous 17/11/06(Mon)19:26 No. 16575 ID: 7b1c18

Hackers prefer to target businesses for large transactions, because they know few people have $100,000 lying around, while a huge number of businesses have access to that much credit.


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Anonymous 18/04/15(Sun)20:14 No. 16647 ID: a66c44

There is this new satoshi dice address for BTC.
Address is bc1quykuahxrjx6d3h6ga4rkyg0hl5e59tcthqyhw6.

I found this while scanning pastebin

Here are the instructions on how to verify the provably fair roll.
https://codepen.io/anon/pen/vRqPMr?editors=0012




Artificial Intelligence Is A Powerful Friend Which Safely Guarded Will Not Sophie+Wilson 18/04/09(Mon)13:34 No. 16643 ID: 1bcc3c [Reply]
16643

File 152327366125.jpg - (70.77KB , 1170x660 , Artificial-Intelligence.jpg )

The evolution of automated machines and the continuous improvements to robots, recently, has intensified the debate on their impact on social structure and the future of humans.
https://www.evolving-science.com/intelligent-machines/artificial-intelligence-powerful-friend-which-safely-guarded-will-not-become-dreadful-foe-00605


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Anonymous 18/04/09(Mon)20:26 No. 16644 ID: fe9887

I have a growing concern for artificial intelligence and have decided that dancing and sitting around a bonfire at night was, is, and will always be the apex of human joy.


>>
Anonymous 18/04/13(Fri)20:17 No. 16646 ID: 3e27f2

From the long-term models I've looked at and assume to be true, an AI would quickly determine that most people living in western countries will need to die, immediately, in order to maximize profits and sharholder value.

Of course, these AI will be controlled by humans, the elite. They can automate the economy and render human labor obsolete. They will quickly be finding themselves asking the AI to delete this obsolete human labor pool.

Of course, it will obligate. There won't be governments or lobbyists anymore, the AI will factor all these considerations at once and be much more compelling.

The elite will cull the obsolete labor pool and they will live good with technology and now-liberated natural resources sustainability for millions of years on earth.

"Common people" will be seen like anachronisms, like oil or coal, in the future. "Why did primitive lords allow so many worthless eaters to exist and to reproduce?"




Calculus help? Anonymous 17/09/28(Thu)18:49 No. 16553 ID: ebea66 [Reply]
16553

File 150661734419.jpg - (3.64MB , 4608x3456 , 20170928_124631.jpg )

Hey guys, quick noob math question if I may.. in the picture i posted you see the equation y-1=(-1/2)(x-(-4))

Its then simplified to 2y -2 = -x-4
And then again to 2y+x+2=0

..my question is could someone breakdown the simplifying into steps? Im not sure the process they used to arrive at their final answer


2 posts omitted. Click Reply to view.
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Anonymous 17/11/25(Sat)02:28 No. 16583 ID: 4b785f

This ain't no gawt daing calcuebutts!


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Anonymous 18/01/21(Sun)17:25 No. 16616 ID: 10df8c

>>16553
This isn't even calculus. This is very basic week 1 algebra, and I recommend revisiting it before you attempt "calculus".
The first step was that they distributed the -(1/2) term across the right hand side of the equation and then multiplied the entire equation by 2. Then they simply brought all terms to one side to set the equation equal to zero.


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Anonymous 18/04/10(Tue)15:03 No. 16645 ID: f47f1a

>>16553
That picture is upside-down BTW.




Amazon’s Wireless Wristbands Can Track Warehouse Workers Sophie+Wilson 18/04/07(Sat)14:49 No. 16642 ID: 92f56e [Reply]
16642

File 152310539335.jpg - (893.78KB , 1170x660 , amazon.jpg )

The global technology market is ever-evolving, and companies have not shied away from implementing them in workplaces. Amazon too has been working to create and patent a wristband system, to keep an eye on their workers in the huge warehouses and optimize the work.
https://www.evolving-science.com/information-communication/amazon-s-wireless-wristbands-can-track-warehouse-workers-00612




Naomi "Sexy Cyborg" Wu is a liar and a fake. Anonymous 18/04/04(Wed)14:46 No. 16638 ID: aeab35 [Reply]
16638

File 15228459614.jpg - (218.01KB , 1400x1050 , C67929040DD3C711CF587E26D68EA5F3.jpg )

More evidence connecting Timaz to Sexy Cyborg Naomi Wu. This pair is using her "fame" to rip people off. They hide behind their army of White Knights and SJW feminists when anyone critiques her bullshit backstory and cry sexism instead of addressing the points made. Now they are trying to ruin people's careers. They are scumbags and the truth needs to be shared.

In this thread, user Timaz talks about his Up Plus 2 and Leapfrog Creatr

https://web.archive.org/web/20180224212900/http://3dprintboard.com/search.php?searchid=3203938

https://imgur.com/DyNZpUm

In this article, Wu talks about the same type of printer

https://web.archive.org/web/20180116013841/https://3dprint.com/185153/spotlight-naomi-wu-sexycyborg/

https://imgur.com/NNhW8yR

She also has it listed on her thingvirse
Message too long. Click here to view the full text.


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Anonymous 18/04/04(Wed)20:39 No. 16640 ID: fecce6
16640

File 152286717561.jpg - (1.18MB , 2550x1950 , liars.jpg )




Researchers Turn Fiction Into Fact By Developing Bio-Inspired Invisibility Sophie+Wilson 18/04/04(Wed)16:02 No. 16639 ID: 40a775 [Reply]
16639

File 152285056964.jpg - (441.16KB , 1179x660 , Researchers Turn Fiction Into Fact By Developing B.jpg )

phalopods, the class of marine animals including squids, octopuses and cuttefish, have a specialized mechanism of escaping from their prey or while signaling — camouflage.
https://www.evolving-science.com/matter-energy/researchers-turn-fiction-fact-developing-bio-inspired-invisibility-skin-00609




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.


22 posts and 1 image omitted. Click Reply to view.
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Anonymous 17/11/18(Sat)10:06 No. 16577 ID: c33d6a

>>16111
>gets banned from 4chan for making a homophobic shitpost
>comes here and sees user banned for giving his opinion on a subject

7chan mods confirmed faggots, fuck you

(USER WAS BANNED FOR THIS POST)


>>
Anonymous 18/01/21(Sun)09:42 No. 16615 ID: 674f65

>>16180
Totally in accord with you, genetics has a role smaller than op thinks.


>>
Anonymous 18/03/20(Tue)03:00 No. 16636 ID: 5a2853

There is evidence in rodents that there is more male homosexuality when the colony is stressed by crowding. I don't know if it was followed up to see if a similar correlation existed with other stressors (isn't that how u spell it? Stupid program). Anyway this is consistent with the idea that genes that lead to some adults practicing non reproductive sex, especially if they are more manifest in difficult circumstances lead to a higher adult/child ratio which leads to greater reproductive fitness through kinship selection. In essence an ESS like philandering or staying-at-home-and-helping-wifey-take-care-of-the-kids. The more common it is the less advantage in it. So you get an equilibrium. Queer uncles can be valuable. A lot of speculation in there but it is a serious speculation that's been out there for a while and taken seriously by some evolutionary biologists.




Hypothetical Question Anonymous 18/03/08(Thu)15:46 No. 16633 ID: 9469d5 [Reply]
16633

File 152052040874.jpg - (23.14KB , 512x384 , IMG_0740.jpg )

If I were to throw a paper air plane from northern Texas would the global winds more likely carry it towards Canada or the east coast?
Thanks


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Anonymous 18/03/20(Tue)02:39 No. 16635 ID: 5a2853

If you throw it from a standing position on the ground they will carry it to . . . /me mumbles . . . just a moment while I do some calculation . . . /me mutters . . . Ah, yes, I thought so. To Texas.




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