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

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US Nuclear site whitepapers? Anonymous 21/10/17(Sun)16:48 No. 17852 ID: 3f0b94 [Reply]
17852

File 163448212468.png - (959.10KB , 915x552 , vogtle.png )

For information on the design of a US NRC licensed power plant/reactor design, what should I look for? I would like to learn about the engineering of nuclear power facilities beyond some overall "big fucking waterheater" descriptions.


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Anonymous 21/10/18(Mon)13:24 No. 17856 ID: 72c0e7

You mean technical schematics, sorry but those are classified.

Now Chernobyl, that's another thing, there's plenty of technical schematics floating around because it's totted as a "what not to do".




Huge numbers. Really huge Anonymous 21/09/19(Sun)09:24 No. 17798 ID: b04a98 [Reply]
17798

File 163203627322.png - (213.73KB , 1100x800 , Pellefant-och-Pip.png )

How many *bits* does it take to correctly represent a 200-million digit number?


13 posts and 1 image omitted. Click Reply to view.
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Anonymous 21/10/01(Fri)05:04 No. 17824 ID: 126958

>>17819
Oops. LOL. No KNOWN primes longer than 83 million bits.


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Anonymous 21/10/09(Sat)22:47 No. 17834 ID: d2a5e8

A little off-topic, but if you guys like extremely huge (finite) numbers, check out this youtube playlist:
https://www.youtube.com/playlist?list=PLUZ0A4xAf7nkaYHtnqVDbHnrXzVAOxYYC


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Anonymous 21/10/10(Sun)18:05 No. 17836 ID: 220f76

>>17834
Thanks! :-)




MATHS AND PHYSICS HELP Anonymous 20/06/25(Thu)23:01 No. 16936 ID: d51c3d [Reply]
16936

File 159311891663.jpg - (180.62KB , 1356x668 , mafs.jpg )

Hello /sci/, newfag here. I want to selfstudy Math,Statistics,Physics. I've bought bunch of SAT and AP books on those topics. Do you have anything to suggest? Any resource would be appreciated.


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Wolfram Alpha DrGonzy!!WvAwV4MTHk 20/06/27(Sat)21:12 No. 16937 ID: fb30bf

I have been told this site is quite useful for math and engineering students.

https://www.wolframalpha.com/


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Anonymous 21/09/15(Wed)11:03 No. 17791 ID: a90f2c

after the understanding of pemdas. the best thing you can do is MEMORIZE identities/ where identities are coins, the coins being equations, and the faces the sides. these dualities can exist in flux while the parts are in place. after you memorize these you must cement them in your mind... for they are the math you seek to understand.

its unpleasant but math is a language of intuition. and probably the hardest to grasp.




Anonymous 20/11/18(Wed)14:49 No. 17053 ID: ef3a67 [Reply]
17053

File 160570739458.jpg - (382.42KB , 843x843 , adoptionstudy.jpg )

Why is the racial intelligence gap so taboo?

You even mention that 70,000 years of evolutionary divergence in separate environments MIGHT have played a role in differing powers of intellect and reason and you're basically blackballed.


20 posts omitted. Click Reply to view.
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Anonymous 21/04/21(Wed)21:11 No. 17462 ID: c92f2d

>>17455
>IQ is used as a measure of intelligence by psychiatrists and clinical psychologists across all ages
Considering it has zero purpose but to classify and label people (you can't improve your IQ), knowing it doesn't help adults do anything. It would be like saying that a person's fingerprints are "used" by psychiatrists and psychologists. They are not, and IQ is not.


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Anonymous 21/05/14(Fri)21:01 No. 17540 ID: 4c24c2

>>17462
It helps inform public policy decisions, and may be used by high IQs to interact with low IQs in such a way that they benefit from the exchange.
It is far easier to push oppressive policies on a segment of the population that literally lacks the capability for coherent thought.


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Anonymous 21/06/17(Thu)23:37 No. 17671 ID: 96fcaa

Everyone know the gap exists and that race plays a role, it's just that no one wants to get Watsoned

https://www.independent.co.uk/news/science/fury-dna-pioneer-s-theory-africans-are-less-intelligent-westerners-394898.html




Blinding laser weapons Anonymous 21/06/03(Thu)23:47 No. 17614 ID: 54a03f [Reply]
17614

File 162275685871.jpg - (249.48KB , 3120x4160 , IMG_20210103_210939.jpg )

I like laser weapons that blind people. Do you?


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Anonymous 21/06/04(Fri)05:57 No. 17615 ID: cf9d5b
17615

File 162277905266.png - (65.75KB , 250x250 , 4356.png )

This isn't science, engineering, nor maths.


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Anonymous 21/06/07(Mon)02:20 No. 17631 ID: a0cb60
17631

File 16230252245.jpg - (399.53KB , 3120x4160 , IMG_20210315_081534.jpg )

Yes it is




Abiogenesis is a fairy tale for Darwinists Anonymous 21/03/26(Fri)20:48 No. 17384 ID: 7d5109 [Reply] [First 100 posts] [Last 50 posts]
17384

File 161678810583.gif - (1.16MB , 320x180 , 1615157057787.gif )

A major unresolved issue when dealing with the origin of life is that prebiotic syntheses invariably generate very heterogeneous solutions of organic compounds. This makes it impossible to imagine how ordered linear polymers, amino acids and nucleotides could be assembled. Prebiotic chemistry could produce a wealth of biomolecules from nonliving precursors. But the wealth would become overwhelming in the prebiotic soup and one cannot fathom how organized chemical processes could emerge from such a mess. At the heart of this problem is a dreary and vicious circle: what would be the selective force behind the evolution of the extremely complex translation system before there were functional proteins? There could be no proteins without a sufficiently effective translation system. How a random collection of proteins would assemble themselves into some kind of proto-cell capable of primitive replication is not even remotely answered. Modern cells require hundreds of proteins carrying out specific tasks when assembling a new protein molecule and if only a small portion of them were crudely made it is impossible to manufacture a new cell. The cells translational system is highly dependent on accurately made proteins and a faulty translational system is by default a biochemical paradox in evolutionary terms. A primitive cell is faced with an impossible task: in order to develop a more accurate translational system is has to translate more accurately. Each imperfect cycle introduces further errors and the cyclical nature of self-replication in the cell means that imperfections lead to autodestruction. A complex system like a cell cannot be gradually achieved because of its many complex and perfectly coadapted proteins.


713 posts and 74 images omitted. Click Reply to view.
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Anonymous 23/02/14(Tue)22:24 No. 18492 ID: 0af699

>>18274
>>18315
The dedication of this strawberry is bewildering.


>>
Anonymous 23/04/10(Mon)13:12 No. 18506 ID: 7d5109

>>18492
>strawberry

Is this the latest schizo babble meaning delusion?


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Anonymous 23/04/11(Tue)08:29 No. 18507 ID: adb842
18507

File 168119456591.png - (90.09KB , 796x703 , larping aspie.png )

>>18506
it's that autist again, lmao




simple identity verification scheme Anonymous 21/05/26(Wed)23:24 No. 17567 ID: 424a5a [Reply]
17567

File 162206427582.jpg - (73.22KB , 720x631 , 5cd8d122da5b12f670c8f07be0639902da5dfb1598d709c992.jpg )

Once, while idly wondering, I came up with a simple scheme to prove the authenticity of a chain of messages given the authenticity of the first.

It consists of putting a hash at the end of each message (but the last, if you know where the chain is going to end) and the input to the previous hash at the beginning (or anywhere really) of each subsequent message.

That's it. It's really simple but I was wondering if it had a name?

SHA256 Hash: d29bde9ef6607caa1f99bd06434449bb972bae43718a7701b2e878bc5fe452a7


3 posts omitted. Click Reply to view.
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Anonymous 21/05/29(Sat)03:05 No. 17580 ID: be6f8f

>>17578
Oh! You mean you include in each message the input to the hash in the previous message. Sorry, I misunderstood. What you're referring to is known as proof of knowledge.

>Also, blockchains have consensus mechanisms such as PoS, FBA and PoW.
A blockchain is merely a data structure where each block is linked to the previous block (or some number of blocks) via a hash. It does not imply a distributed system. Even if there is a distributed system, the consensus algorithm can be as simple as "whatever the authoritative source says", which is pretty much how Git is typically used.

>>17579
>I said prove authenticity "given the authenticity of the first", not absolutely.
If that's all the assurance you want, you could also include your ECDSA public key in the first message and the signature for each subsequent message. Then you wouldn't need to keep track of which secret message you used as input to the previous hash.
Needless to say, neither method protects you if the site's operator decides to rewrite you messages.

>All in all, it seems like a pretty useless protocol compared to something like RSA or Lamport signatures. Oh well, it might end up being useful as part of something else, or in a different form.
Well, you're just using it wrong, I'd say. Proofs of knowledge are typically used to prove that you had a piece of information at an earlier time that you decide to disclose that information. For example, you might make public a hash predicting that the stock market will crash this week, and after it crashes you make public that information, which should hash into the previous hash.


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Anonymous 21/05/29(Sat)18:11 No. 17581 ID: 424a5a

Previous password: "Rose Mary"

>>17580
I've heard of proofs of knowledge. Though I dont think I've heard of them by that name.

> you could just use ECDSA
How fast is it to generate an ECDSA keypair and sign messages? IIRC RSA is slow compared to this scheme.

Next hash: 5fcb6406566e4cbe34ceb9ee0cc2cf02f729842c369936763b550101ae8c7354


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Anonymous 21/05/29(Sat)20:55 No. 17582 ID: 746924

>>17581
IIRC, almost all naturals less than 2^256 are valid Secp256k1 private keys, so picking a private key is just a matter of getting a few random bits. I think there were exactly two points on the curve that were unusable; one was an inflection point with only a single solution to the equation and the other's tangent was vertical.
Other curves may work differently, although I think all ECDSA curves are more or less the same with only the coefficients changing. As I recall, Curve25519's curve is somewhat different.

Signing a message with ECDSA is faster than RSA, but slower than getting a SHA-256 digest, because the process involves hashing the message. In particular, Secp256k1 uses SHA-256.




Anonymous 21/04/01(Thu)14:03 No. 17402 ID: ecff09 [Reply]
17402

File 161727861988.png - (1.08KB , 128x128 , C__Data_Users_DefApps_Windows Phone_AppData_INTERN.png )

Some loser was talking shit about my trivial zero explainayion but it was objectively better than all of the ones I got and this is inaeguable and edgy losers n 4chan Sci are just trying to patch manipulate me lol.


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Anonymous 21/04/01(Thu)20:11 No. 17404 ID: 746924

[Trivial zero] explanation, or trivial [zero explanation]?

Also, what the fuck are you talking about, OP?




Sad Anonymous 20/08/29(Sat)19:17 No. 16978 ID: 7d5109 [Reply] [First 100 posts] [Last 50 posts]
16978

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https://www.bbc.com/news/science-environment-39054778
>Science is facing a "reproducibility crisis" where more than two-thirds of researchers have tried and failed to reproduce another scientist's experiments, research suggests.
>"It's worrying because replication is supposed to be a hallmark of scientific integrity," 

Why do people treat the scientific method as some kind of universal solution to everything when in fact it is flawed?


260 posts and 18 images omitted. Click Reply to view.
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Anonymous 21/03/26(Fri)08:40 No. 17380 ID: a5f8ec

>>17378
Genetics in general disprove evolution. The only way to ”prove” it is by making up scenarios in a computer or to insert billions of improbable mutation events wherever you cannot close the gaps.


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Anonymous 21/03/29(Mon)21:29 No. 17392 ID: 0a320d

>>17378
>I've never heard of genetic homeostasis. Kind of ironic that there is a genetic process that prevents speciation.
Think of it in terms of "if it ain't broke, don't fix it".

We simplify it so that people think that if something evolves a benefical trait then it will proliferate across the species and if it evolves an undesirable one it won't. The reality is many desirable traits die out before they can establish themselves in a species, and contrary to popular belief, many undesirables ones don't and do become established. The hallmark of evolution is that more desirable traits propergate than undesirable ones and this is in large part due to Darwin's theory, 'survival of the fittest', you are less likely to survive to adulthood (and reproduce) if you have undesirable traits compared to a specimen that has desirable ones.

To put it in human terms; just because you're stronger/smarter than someone else doesn't mean you're guaranteed to reproduce more than them (assuming you do at all).


>>17380
Still waiting on your theory.


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Anonymous 21/06/10(Thu)21:07 No. 17645 ID: e47187
17645

File 162335204530.jpg - (83.33KB , 600x600 , Rab78d25602c96313a9264185a1b5ccdd.jpg )

>>16978
>>16981
>science is a religion for atheists
I for one am not an atheist, oh fool who has been brainwashed and indoctrinated for most, if not all of his life, by kosher filth. I'm an Agnostic.
>YOU GOTTA BELIEVE
Faith is by no means a bad thing, but its what you believe and have faith in that matters, NOT just believing in something. Also, The Bible never says where exactly heaven is. Facts don't change and numbers by their own dont' lie. Just because someone misinterprets some pieces of data doesn't automatically invalidate it.You by your faith in the worthless Jesus of Nazareth (as with Muslims having faith in and their praying 5 times a day to ""ALLAH"") are giving energy to human hating entities that don't really care about you in ernest; you have been manipulated and lied to by the Jews/Hebes and their Reptilian masters.




Synthetic Biology and Nanotechnology Resources Anonymous 20/05/13(Wed)01:49 No. 16919 ID: c95db8 [Reply]
16919

File 158932739061.jpg - (433.77KB , 700x1108 , 30956e20354fe6608b84de118b457f44.jpg )

What are the best resources and textbooks for learning about synthetic biology and nanoscience/nanotechnology? The wiki doesn't have anything on those.

Also, what other /sci/ boards are out there?


3 posts omitted. Click Reply to view.
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Anonymous 20/07/24(Fri)01:06 No. 16959 ID: b17623

>>16919
>>16931
https://boards.420chan.org/stem/
420chan has been around for a while. unfortunately, activity on the stem board is slow. but the content there is decent.


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Anonymous 21/02/03(Wed)11:16 No. 17240 ID: d80523

also have interest in it


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Anonymous 21/02/03(Wed)11:40 No. 17241 ID: 307cde

Scientists have long proven the negative effect of radiation on humans. It is enough to recall the accident in Chernobyl and the number of people who participated in the elimination of the consequences of the disaster, who fell ill with radiation sickness. So thats why I bought geiger counter on https://ecotestgroup.com/products/agent-r/ for checking level of radiation





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