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Oh, hey. We're actually having old posts pruned now.

 No.2523[Reply]

test

mod please delete

10 posts omitted. Click reply to view.

 No.3884

nope. gonna make use of this. does anyone have a start on the quantum stealth material? i wanna be rayman with no arms.




 No.34[Reply]

Rewrote this to be slightly less shit.

Anyway, welcome to not-halfchan-/sci/, home of actually intelligent and decent discussion. Of course, anarchy tends to prevent this, so we will have to have rules.

1: Religion vs science arguments are prohibited. Take that shit over to >>>/rel/, please. Or, better yet, don't fucking do it.

2: If you're here to ask for help on homework, go to >>>/hwk/.

3: Sources for all facts, okay?

4: Keep topics related to science and mathematics, please. It's the name of the board for a reason.

More can be added if necessary. Again, don't make it necessary.

Post last edited at


File: 1458361384014.jpeg (18.15 KB, 181x172, 181:172, image.jpeg)

 No.3880[Reply]

http://www.rawstory.com/2016/03/early-homo-sapiens-mated-with-both-neanderthals-and-extinct-denisovans-species-researchers/

This does a lot to explain the differences in races. Still hard to imagine how hummanity branched out without initially breeding with them, and then caused these species to go extinct (partly by fucking their genes into oblivion.)

 No.3883

What's new about this story exactly? We've known that humans bred with neanderthals for several years at least now.




File: 1453920968134.jpg (310.41 KB, 1303x885, 1303:885, HO-ITER-TK-cooling_1.jpg)

 No.3771[Reply]

I'd like to ask a few scientific questions to the smart people this board:

1. is global warming going to screw me within my lifetime? should I worry about it?

2. is it true that solar is hopeless as a new energy solution? that's what I heard from my teachers about 9 years ago, maybe it has changed?

3. is there any hope for nuclear fusion to help address the global warming issue, if not simply become a convenient new energy source?

4. what about hydro? in Canada it is already providing most electricity, and is not as polluting as e.g. coal

8 posts and 1 image reply omitted. Click reply to view.

 No.3868

>>3846

>Solar can work as a supplement if you live close to the equator and SoCal does fit the bill

SoCal is one of the few locations on Earth which is both densely inhabited and has enough sunlight for solar to actually generate significant power.


 No.3869

>>3868

>SoCal is one of the few locations on Earth which is both densely inhabited and has enough sunlight for solar to actually generate significant power.

That's what I basically said. I just said it with less enthusiasm because I'm aware of the real costs of variable energy systems.

This is a perfect example of what I meant when I said that solar is cheap because of subsidies.

>Bankruptcy Looms For Spain's Green Energy Giant

>At the Paris climate summit earlier this week, Spanish Prime Minister Mariano Rajoy pledged to "de-carbonize" his economy. But back home, Spain's biggest renewable energy company is on the verge of becoming the country's biggest-ever bankruptcy.

>two years ago, Rajoy's government cut its subsidies for solar and wind power in Spain. It was early 2013, at the height of Spain's economic crisis. Unemployment was near 27 percent, and the Spanish government was struggling to pay interest on its debts.

>The cutbacks devastated Spain's renewables sector. Some smaller firms went out of business. Big survivors like Abengoa were left living off loans.

>Its stock has plunged more than 50 percent. And the company is applying for creditor protection — the first step toward bankruptcy.

>http://www.npr.org/sections/parallels/2015/12/02/458127741/bankruptcy-looms-for-spains-clean-energy-giant

And

>Nevada Solar Power Business Struggles To Keep The Lights On

>Nevada's home solar business is in turmoil as the state's Public Utilities Commission starts to phase out incentives for homeowners who install rooftop solar panels. Some of the largest solar companies have stopped seeking new business in the state and laid off hundreds of workers.

Post too long. Click here to view the full text.

 No.3870

>>3771

1. Yes, to some degree

It is called climate change now for a reason, some places actually get cooler. A lot is to do with changes in water location, atmospheric heat reflection, and loss of key intra-enivironmental biota

2. Not necessarily

Back before Huang Ho Charlie opened up the first Chinese-style solar factory, the toxic silicon compounds produced were recycled to make more photovoltaic cells from the same amount of silicon. This recycling requires expensive equipment, and fossil fuels are used to transport said waste. This is where China comes in. Not only do they mishandle the various toxic acids and bases used to catalyze the reaction, but also dump the waste in the nearest river, because China.


 No.3871

>>3846

fewest deaths is in part due to the scare campaigns put out by OgrePeace

>>3870(cont.)

So in essence, solar could technically be useful, but since China exists, it's just a gimmick for large scale energy and still fucks the environment up

3. Yes, and yes

Except that hope lies in the hands of hyper-kike power families & Bildeberg Butt Buddies.

The problem lies within the general hate towards anything with "scary" words in it, like "nuclear" or "atomic" because some stupid inbred Pommy fuckwit dropped a few on Abbos in the 20th century

4. It fucks up the water cycle, and the production costs in money and environmental damage are still relatively high, in the short term.

Concrete doesn't grow on trees


 No.3882

>>3871

>fewest deaths is in part due to the scare campaigns put out by OgrePeace

It has the fewest deaths because of all the safety systems built into every design. G3+ and G4 designs are nearly failure-proof and G5 are failure-proof and some can actually consume existing waste.

None will ever get built in this country ('Murricuh!) because of the irrational fears of John Q. Public. I really hate that guy.




File: 1458396703317.png (67.37 KB, 808x868, 202:217, 1918 conspiracies n shit.png)

 No.3881[Reply]

doglins



File: 1458248605547.jpg (1.04 MB, 1836x3264, 9:16, 20160317_155449.jpg)

 No.3878[Reply]

Solved all the other problems and came back to this one. It's still wrong when I put it in Wiley. I have not the foggiest idea why this is wrong.



File: 1453063961757.jpeg (291.58 KB, 1800x1221, 600:407, Sierra_Nevada_Albert_Bier….jpeg)

 No.3742[Reply]

What are some good books/reads on ecology?

5 posts and 1 image reply omitted. Click reply to view.

 No.3855

>>3742

Not a book but I found it interesting that even with all the robots we send into space, we still haven't found a way to make a robot that can handle the radiation at fukushima.

http://www.reuters.tv/gOD/2016/03/11/no-end-in-sight-for-fukushima-clean-up


 No.3865

Thanks for all of the (few) posts guys. Reporting that I've found two cheap textbooks on ecology and they're here now. I'm also waiting for a book specifically relating to behavioural ecology.


 No.3866

>>3865

Which textbooks did you get?


 No.3867

>>3855

There are robots hardened against radiation. Tepco just didn't have any on hand for the cleanup. It's actually pretty simple to shield against radiation: light hydrogen for neutrons, alpha, and beta and lead for gamma (full spectrum). It does add some cost and weight but it protects electronics very well. Dedicated anti-radiation bots will be able to survive indefinitely.


 No.3877

>>3866

As I said, I had to get what was cheapest (17 yr old NEET pride) which inevitably forced me to get older editions.

Ecology: Concepts and Applications (4th Ed. Sep 2006)

Ecology: Second Edition (2011)

An Introduction to Behavioural Ecology (Fucking 1993)




 No.3875[Reply]

daily reminder science is being used as a weapon against the public <by the evil aliens> your peers are to blame.

.all messages to science subreddits heavily controlled

messages to health subreddits have to be pre-approved

this is a resistiance roachcast

http://pastebin.com/raw/JWCsrZTN

 No.3876

File: 1458220405236.png (696.4 KB, 1336x1056, 167:132, hehe.png)

>>3875

warning. psychiatry is being used as a weapon to mutilate and sterilize the general population.

they are going to blame mental illness on your DNA next, the treatments will be DNA modification.




File: 1456164578748.jpg (68.95 KB, 600x800, 3:4, 1406334300331.jpg)

 No.3830[Reply]

Does anyone know if these solutions are legit?

http://waxworksmath.com/Authors/N_Z/Schroeder/schroeder.html

I need to know if I'm getting the right answers to the even problems and I have no fucking way of checking my answers' validity without buzzing about in Mathematica which can be quite a pain in the ass since I'm not proficient with it yet.

 No.3840

>>3830

They look good. Skimmed through some of them, I did similar shit a couple years ago and it looked right.

But I cannot vouch for it, there can be some mistakes, I mean fuck, when I did thermodynamics our book with problems had a couple of mistakes in the solutions section.


 No.3873

>>3830

Some are right, some are wrong and unfortunately for the really hard problems he often has no answer.

Part of the official answer book is here http://gen.lib.rus.ec/book/index.php?md5=dd12d7469cb3f4c6a9cff89781ad5bfc


 No.3874

>>3830

By the way damn Schroeder to hell for not providing any answers at all.

Autistic wanker.




File: 1457331790903.png (45.7 KB, 238x378, 17:27, image.png)

 No.3849[Reply]

Did you know semen from the first male a female fucks can affect the genes in the off-spring when she fucks another male?

http://onlinelibrary.wiley.com/doi/10.1111/ele.12373/full

 No.3850

Telegony*


 No.3851

Yeah I remember reading this paper when it came out. Pretty fascinating stuff.

Of course the important point that OP left out and /pol/ won't tell you is that this is something that's only been found in a species of fly.


 No.3863

>>3851

thanks for clearing that up


 No.3872

>>3851

Yeah, he did leave that out. Human testing should be done to see if this is viable. Probably isn't in my opinion.




File: 1457796577941.jpg (89.54 KB, 304x247, 16:13, Biological Machine.jpg)

 No.3864[Reply]

What are the most promising life extension technologies /sci/? How effective are they going to be?



File: 1457790261566.png (5.26 KB, 555x508, 555:508, 34801412922058955.png)

 No.3862[Reply]

There is a german saying: »Alle guten Dinge sind drei.«

I present you Quantum Logic.

https://www.youtube.com/watch?v=TFTK074nG_M



File: 1446230121120.jpg (339.4 KB, 1366x768, 683:384, cave.jpg)

 No.3342[Reply]

Using letters, symbols and numbers write the largest number you can in 100 characters or fewer.

No infinity/s and if you make up a symbol/operation/etc you must be able to define it with in the 200 characters.

I'll start with a relatively small number to get the ball rolling.

9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

pic unrelated

40 posts and 1 image reply omitted. Click reply to view.

 No.3643

I define # to be the amount of electrons in the universe

Using the n-arrow operator ↑^n:

#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑^(#↑↑#)#)#)#)#)#)#)#)#)#)#)#)#)#)#)#)#


 No.3644

>>3643

>the amount of electrons in the universe

but electrons are a grand canonical ensemble


 No.3859

>>3643

>I define # to be the amount of electrons in the universe

One?


 No.3860

hey niggas

Can someone explain TREE in VERY, very, very, very layman terms


 No.3861

>>3481

I define "ß", as absolute value of the sum of all numbers that have been thought.

ß




File: 1446258832353.jpg (64.49 KB, 1205x1349, 1205:1349, Mars_atmosphere_2.jpg)

 No.3354[Reply]

>there are people right now who believe we should avoid teraforming other planets for our own purposes in order to preserve the "science" on those planets

Seriously? Mars in particular is a dead rock with nothing of value. Why should we not just take it for our own?

Then there are those conservationists that want to preserve nature just for the sake of preserving nature. What is the point?

Manifest destiny.

33 posts and 4 image replies omitted. Click reply to view.

 No.3799

"Terraforming" is a stupid idea, and just bad science fiction.

Even if terraforming were economically feasible, why the fuck would you want to set up a base inside another gravitational well? The biggest hurdle to space exploration is just how expensive it is to get shit off the Earth and into space. Why the fuck would you want the same problem, twice?


 No.3800

File: 1455091063832.jpg (32.48 KB, 600x400, 3:2, A sphere made of six metal….jpg)

NASA Suspends 2016 Launch of InSight Mission to Mars

>After thorough examination, NASA managers have decided to suspend the planned March 2016 launch of the Interior Exploration using Seismic Investigations Geodesy and Heat Transport (InSight) mission. The decision follows unsuccessful attempts to repair a leak in a section of the prime instrument in the science payload

http://www.nasa.gov/press-release/nasa-suspends-2016-launch-of-insight-mission-to-mars

Hasn't it been guesswork until now, the composition of core? How much is liquid - why did the outer core solidify - is it fully solid, what is there? Getting a look at that should be the priority for colonization of mars, no?

There's no real point having a colony without a decent magnetosphere.


 No.3814

>>3354

I think it stems from the idea that we should see how something plays out on its own. Sorta like that Star Trek directive. I have no clue why people have a grudge against teraforming but I can see plausible arguements against teraforming planets with living things. As long as every planet in our solar system doesn't look as artificial as New York City, then fine by me.


 No.3857

File: 1457751247588.jpg (32.95 KB, 335x450, 67:90, cosmonaut-gagarin-1.jpg)

>>3549

Gr8 b8 m8


 No.3858

>>3857

Fugg i fugged up




File: 1457713851917.png (54.27 KB, 513x505, 513:505, 1457701651258.png)

 No.3854[Reply]

How about some feminist science?

> Glaciers are key icons of climate change and global environmental change. However, the relationships among gender, science, and glaciers – particularly related to epistemological questions about the production of glaciological knowledge – remain understudied. This paper thus proposes a feminist glaciology framework with four key components: 1) knowledge producers; (2) gendered science and knowledge; (3) systems of scientific domination; and (4) alternative representations of glaciers. Merging feminist postcolonial science studies and feminist political ecology, the feminist glaciology framework generates robust analysis of gender, power, and epistemologies in dynamic social-ecological systems, thereby leading to more just and equitable science and human-ice interactions.

http://phg.sagepub.com/content/early/2016/01/08/0309132515623368.full

> We ice explorers now.



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