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/sci/ - Science & Math


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11528465 No.11528465 [Reply] [Original] [archived.moe]

What do you think is the likelihood of a technological singularity happening in the next three years?

I'm sure it sounds crazy but Vernor Vinge (professor of mathematics and computer science at the University of California, San Diego) claimed just that in his 1993 essay The Coming Technological Singularity:

https://edoras.sdsu.edu/~vinge/misc/singularity.html

The more I think of it, the more it seems like a possible scenario. It's obvious that technological progress is an exponential process and history shows that humans are incapable of comprehending exponential growth. Ask most people if they would prefer a million dollars right now or a penny doubled every day for a month and most people would choose the former. The initially exponential logistic curve of COVID-19 cases took many countries and governments by surprise. And even as recently in 2015, most people were saying that computers wouldn't defeat human experts at Go for at least another decade because of the historically slow rate of progress in this field. Now new versions of AlphaGo are beating the original AlphaGo 100 games to 0.

>> No.11528471
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11528471



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11528450 No.11528450 [Reply] [Original] [archived.moe]

So there are some ideas going around how to make testing for Corona more efficient, given resource and time limits on testing. One idea is to bulk test groups of people by simply mixing their bio samples, and quarantine everyone in case the test turns up positive. That way you'll be able to contain the virus with relatively few tests.

But this idea can be pushed further: what if we combine samples of lets say 100 people, and in case of positive, divide the group in two groups of 50, and re-test both groups, etc. Of course keep in mind that in this example, if a bulk test gives a positive, there can be more than one person who is positive.

So this can be solved analytically, but I suck at math: How do you find every infected person in a population of N people, while minimizing the number of tests? A safe assumption here is that if N is the total population of a country, there will be at least one person who's infected.

>> No.11528455

fuck and piss and shit and cunt and fuck sucking nigger dicking cock CUNTING MOTHER FUCKING FUCK FUCK PISS FUCK SHIT CUNT FUCK FUCK FUCK

>> No.11528463

>>11528455
not quite the response I was expecting but thanks for the bump anyway



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11528440 No.11528440 [Reply] [Original] [archived.moe]

This is the whole point of EXPONENTIAL growth. There is no REAL way to combat it because it takes any and all available resource paths. Some basic math as to why we always want to avoid any vectors that led to exponential cases of ANY KIND is because by definition the exponential boundaries are not sortable or orderable.

At some point it is simply:
1. Take care
2. Hope for the best
3. Things will be different for both myself and everyone else because of this event no matter what
4. Know that everyone will be trying their best to heal and return to all the conversations and activities they can when the worst is over
5. Don't try to push anyone overboard or away because of all this
6. People pushed to the brink will try more new things than before, either to cope or survive
7. Enjoy the rollercoaster!

Best of luck to you 4chan.

https://www.bbc.com/news/world-52144390

>> No.11528457

i'll teach your grandmother to suck eggs



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11528416 No.11528416 [Reply] [Original] [archived.moe]

FUCK IT YOU SHITTY FUCK STEEL GAY DILDO.

Shit!
3 times now.

>> No.11528420

>>11528416
See you next month for SN4



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11528411 No.11528411 [Reply] [Original] [archived.moe]

How effective are these half-masks?

>> No.11528423

Good against bad smells, irrelevant against virus since eyes are unprotected.



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11528402 No.11528402 [DELETED]  [Reply] [Original] [archived.moe]

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



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11528373 No.11528373 [Reply] [Original] [archived.moe]

Are there any /sci/ approved methods for making masks at home that offer reasonable protection from coronavirus?

2 replies omitted. Click Reply to view.
>> No.11528381

>>11528373
No because they don't offer protection from viruses, retard.

>> No.11528382

>>11528373

These mask protect others from your germs. That's what they are made for. You need the rarer and more expensive FFP2 / FFP3 which has filters. You will also waste them if you don't have training.

>> No.11528386

>>11528382
spastic

>> No.11528388
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11528388

Surgical mask were made so that doctors don't spread their germs to patients, not the other way around. For true protection, you need respirators with filters.

>> No.11528393

>>11528373

https://www.youtube.com/watch?v=0lG1w_U7kss

https://www.youtube.com/watch?v=zg4Xg7_u3sE



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11528237 No.11528237 [Reply] [Original] [archived.moe]

Can someone explain to me why every source since the beginning of the outbreak has used (deaths/cases) to calculate the death rate and not (deaths/closed cases)? What am I missing here?

>> No.11528254

>>11528237
healing takes longer than dying

>> No.11528262

>>11528237
deaths/closedcases is an awful statistic because it's easier to say a person is dead than keep track of who has and doesn't have coronavirus

>> No.11528284

>>11528237
>What am I missing here?
A brain. Now go back to /pol/.



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11528216 No.11528216 [Reply] [Original] [archived.moe]

Mochizuki won, White pig lose.
The Japanese are the strongest desusi osusi~.

>> No.11528227

Mathematical proof that rocked number theory to be published.

Scholze and Stix「ummmmm」

>> No.11528247

based smug mathman

>> No.11528283

Based smug anime girl.



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11528211 No.11528211 [Reply] [Original] [archived.moe]

What colour is the inside of an iceberg?



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11528210 No.11528210 [Reply] [Original] [archived.moe]

Woah

11 replies omitted. Click Reply to view.
>> No.11528269

>>11528210
>>11528218
>>11528223
>>11528224
>>11528230
>>11528236
>>11528240
>>11528242
>>11528246
>>11528249
>>11528255
>>11528264
>no one has figured out the pic is fake
I guess 4chan really is full of retards

>> No.11528275

>>11528269
>pic fake
who cares, op has an opinion nevertheless
that opinion is what the replies are reacting to

>> No.11528280

If I am obese, breathing on a person doesn't make them obese. That shit isn't even comparable. Feeling smart from some presentation like that is emabarrassing

>> No.11528291

>>11528210
Why do pretentious cunts keep making comics?

>> No.11528368

>>11528223
I think the fallacy is false equivalence.
In the cases of smoking, drinking, and over-eating, the actor is the victim.
In the case of being irresponsible and infecting someone else, the victim is different from the actor.
In general, our society is fine with people exposing themselves to risk.
It is not fine with people exposing others to risk.



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11528187 No.11528187 [Reply] [Original] [archived.moe]

I found a wiki listing every drugs, nootropics and mind trip possible, a better erowid if you want.

it was called ___tronaut but i cant find it

>> No.11528189

psychonaut nvm



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11528173 No.11528173 [Reply] [Original] [archived.moe]

Is this the millennial equivalent of boomer humor?

>> No.11528201

>>11528173
I'm Gen X and I saw that comic way back in my college days. It's from the 80s or earlier

>> No.11528212

>>11528173
Yeah, that's from 1977 dude
>The S. Harris "then a miracle occurs" cartoon appeared in the November-December 1977 issue of American Scientist



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11528150 No.11528150 [Reply] [Original] [archived.moe]

What is the psychological explanation for this?

>> No.11528153

>>11528150
ego

>> No.11528161

>>11528153
also wants a magic pill to make homework go away

>> No.11528176

same situation desu. I'm gonna finish a 3 year CS degree in 6 years.



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11528119 No.11528119 [Reply] [Original] [archived.moe]

4real senpai



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11528110 No.11528110 [Reply] [Original] [archived.moe]

What is a good YouTube channel to learn about quantum physics?

9 replies omitted. Click Reply to view.
>> No.11528353

>>11528116
This is true and has been scientifically proven. Brainlets gonna brainlet though...

>> No.11528396

>>11528353
>has been scientifically proven.
post proof

>> No.11528427 [DELETED] 

>>11528339
>what is +10sek

>> No.11528429

>>11528339
what is +10sek

>> No.11528460

>>11528281
ty
>>11528295
Gonna actually learn through textbooks, just want something to watch while I'm comfy in bed and too tired to focus on actually studying



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11528092 No.11528092 [Reply] [Original] [archived.moe]

A happy place to talk about Electrical Engineering, and any Electrical Engineering related topics

3 replies omitted. Click Reply to view.
>> No.11528147

>>11528092
what is the best subspeciality?

>> No.11528214

>>11528147
Career-wise?

>> No.11528238

>>11528126
Why?

>> No.11528263

>>11528214
yeah where the jobs at

>> No.11528273

>>11528263
depends on where you live, but things like communications, DSP and power systems are pretty versatile



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11528082 No.11528082 [Reply] [Original] [archived.moe]

How does one come up with the injective function
[math]f:\mathbb{N} \rightarrow \mathbb{N}\cross\mathbb{N}[\math] shown in the picture?

>> No.11528406

>>11528082
[math]f:\mathbb{N} \rightarrow \mathbb{N}\cross\mathbb{N}[/math]

>> No.11528415

>>11528406
http://detexify.kirelabs.org/classify.html
Just draw the symbol you are looking for into the square area above and look what happens

>> No.11528418

>>11528082
Well you have an infinite square and you want to list them all one by one, without repeating anything and in such a way that every element of the square is listed somewhere. How do you do it in a systematic way? In my opinion, listing them in a diagonal fashion as in your pic related is the most natural way to listen them.
It's just one of the tricks in mathematics that you once learn about and never forget.

>> No.11528434

>>11528082
The nth triangular number is n(n+1)/2
Find the largest triangular number, t, that is less than or equal to x-1.
Find the n corresponding to t.
Let r = x-t.
Map x to (n+2-r,r)
You can find n by solving y(y+1)/2 = x-1 then letting n = floor(y)
Use that n to get t.



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11528078 No.11528078 [Reply] [Original] [archived.moe]

I just got tested positive for COVID-19. AMA.

5 replies omitted. Click Reply to view.
>> No.11528166

>>11528101
COOM

>> No.11528188

>>11528101
sounds like you got sick of BASEDNESS

>> No.11528198

>>11528108
There are patients reporting coughing blood

>> No.11528203

>>11528101
Okay, seriously bullshit.

You wouldn't have the symptoms for 3-5 days after encountering an infected individual: its the entire REASON this virus is so infectious, because people don't get symptoms to warn them to stay at home until they've been out spreading it for a couple days.

>> No.11528204

How does it feel to have something that doesn't exist



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11528050 No.11528050 [Reply] [Original] [archived.moe]

WHO takes these guys seriously anyways? They're obviously just ripping off a band from the 60's.

https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance



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