Okay, med/sci/, explain something to me - I thought that modern STD tests were done by testing urine. But when I was in the Philippines for work, I scheduled a "complete" physical exam with a bunch of lab tests, since it was a lot cheaper than in the west.
At one point during the exam, the doctor pulled up my gown, grabbed my penis, and said "Deep breath please, don't worry!" as she jammed a swab up my urethra.
I must say, it was distinctly uncomfortable.
Are they just using outdated techniques, or does this actually give you more accurate results than just testing for STDs via a urine sample?
>>8807076
that's hot OP
it's probably neither outdated nor more accurate; just different.
>>8807076
Some are done with a direct urethral swab (HPV) and some through urine (chlamydia).
Others are done entirely throught blood (HIV and syphilis).
It depends what they were testing for.
>>8807076
Did you cum?
Would there be any benefit in launching a pirate internet satellite?
Similar to pirate radio operating on the laws of the sea, it could potentially provide unregulated internet or data services.
it would be taken down in no time.
>>8806736
How hard would it be for a government to safely take down a satellite they have no control over? Do you think a bunch of pirate satellites orbiting earth would be good incentive for governments to increase funds for their space programs?
>>8806743
MPAA would develop their own line of sat-killer satellite drones and launch them to go after the pirate internet satellites eventually causing Kessler syndrome and cutting off space to humans for 10k years.
So, every Easter one of our math teachers at high school deals out small logic and maths problems that people can solve for fun.
This is the third one, and although I'm kinda getting towards a solution, it's going slowly and I'd appreciate some help.
Rules: You have a 7x5 grid, and you have the equivalent of chess' knight starting in the lower left corner, meaning he can move in L shape.
The aim is to determine whether it's possible to go to every grid square exactly once, and end up back where you started.
How do I determine this without trying every possibility?
Obvious things I already figured out:
1.If you can prove that it's impossible to fill every square, you prove that it's impossible to do what's asked.
2.Since you have to do a loop, the starting point technically doesn't matter. Although it doesn't prove anything, it might make it easier to determine whether it's possible to do what's asked.
3.From testing multiple times, it seems impossible to do the loop. Haven't clearly figured out why yet.
4.Since the starting point doesn't matter, proving that going on every square exactly once isn't possible by starting off one of the squares in a grid of 3x4 in any corner, you prove is for the rest of the grid since you can just rotate/mirror it to prove the rotated/symmetrical cases.
More specific facts:
1.If you arrive at the one of the extremities of the red paths, you have to go through the entire red path, because otherwise you end up with an impossible case.
2.If you land into one of the points of the blue loop, you have to complete the loop otherwise you end up with a failed attempt again. You also have to make sure that when going into the blue loop, you have a way out.
3.I'm unsure about this, but it probably doesn't matter whether you first fill out the squares that go through the blue/red paths before going through the "undetermined" path. This idea comes from the fact that since it's a loop, you have to go through the blue/red paths at some point anyway, so since the starting point is free to choose, choosing to complete the paths first or last doesn't matter. It's also probable that the blue/red paths need to be followed one right after the other, since some of the red paths extremities correspond to the entry/exit points of the blue loop.
So, my current strategy is to prove that for any of the upper right squares with a pink corner marker lead to a case where you fail.
The squares with a pink marker indicate every square that is not one the blue/red paths from previous picture.
So, for every of these squares, with the blue/red paths logic in mind, I might be able to prove that you always end up in a failed attempt.
At this point it's still backtracking though so I need to figure out further logical aspects to be able to justify myself.
Obviously perpetual motion is impossible as far as we know.
But I'm curious to see if there are any machines that generate energy very efficiently but just can't quite achieve over-unity due to a subtle quirk in physics (e.g: Friction or some microscopic force / phenomena) that prevents it from doing so.
I'm not looking for things that preserve energy like a flywheel in a vacuum. The device actually has to generate / convert energy of some form to another efficiently.
I'm looking for interesting dead ends.
>>8806418
Not sure if there is a device that can reach that high of an efficiency, there are too many physical boundaries to overcome
>>8806418
There are none, PM is impossible even in theory because of time and entropy.
>he unironically uses the word unity.
>"quotient rule"
This meme needs to die.
It's just a special case of the product rule.
>>8806229
>"division"
This meme needs to die.
It's just a special case of multiplication.
Tensor calculus quotient rule is where it becomes a true meme
>>8806229
im in my first year of college now, taking calculus
i read ahead on all the material and understand it all very well
quotient rule is my personal favorite, i am a master at it.
i enjoy talking to my professor after class.
one time, we were in class and he asked what a real number was and i said ``convergent cauchy sequence''
his eyes lit up but he continued with the lecture
afterwards, we bounced mathematical ideas off each other. he told me to look at analytic number theory and i gotta say its quite interesting
it feels nice to be ahead of the curve
>currently studying to get onto civil engineering course at a well respected uni
>I'm not especially bright and I rely heavily on hard work to get through
>all the work is piling up and I can't outrun it
>currently averaging 16hrs a day of work
>constant exhaustion
>worried I'm not going to be able to continue at this pace long term
I thought I'd ask here as I'd imagine many of you might have been in my position once
Does anyone have any advice to help keep going at this pace?
I know it's quite a difficult question to answer but really anything would be appreciated.
red bull
working with classmates
asking respectfully for extensions
starting work as soon as you get it assigned
modafinil
Suicide.
hard anime girl problem thread
>>8806007
do your own homework
>>8806012
?
im not asking for answers just questions you animal.
>>8806007
i understood the first two lines desu !
Why is it not more widespread that pattern recognition is the basis of everything? I actually first heard it a few years ago and was shocked by the assertion that all intelligence is just pattern recognition.
Except it's entirely accurate that all we do is pattern recognition. Why are things like this not more well known in popular culture or popular understanding?
>Why are things like this not more well known in popular culture or popular understanding?
You could ask this question about anything. It's because people are far more stupid and less interested than you give them credit for.
>>8805246
Yes, but understanding things from the basis of pattern recognition actually improves how you think. Especially when it comes to science, religion, etc debates.
It gives a far better foundation for understanding the world. I actually think we would probably be best off teaching everything off the basis of a pattern language rather than math.
>>8805241
It's obvious, so there was no reason to discuss it
Are all kleptomaniacs mentally ill? What goes on in their head when they decide to steal? They steal the most worthless and random shit, putting themselves at great risk over nothing. The other day some faggot in my class went through my belongings and stole a t shirt from me and nothing else. A goddamn fucking t shirt. He flat out denied stealing it even though it was in clear sight partially sticking out of his bag. What the fuck is wrong with these people? All kleptomaniacs I've come across just seem real fucking weird and 'off'. They're not normal at all and appear to have some form of autism.
>>8805160
Im assuming you grabbed it and then embarrassed him in front of everyone. Its a disease called mental illness. Its untreatable and permanent.
>>8805160
To prove how careless people are with their stuff.
>>8805160
They are junkies getting off on the chemical thrill of getting away with it and/or the chemical guilt of possibly/actually being caught.
Sounds like your guy is into cocktails.
What's the next step in battery technology?
>>8803547
Solid State
market feasibility
>>8804944
This.
Probably made out of layered graphene.
>Women can't do Sci-
noether can she
Criminally underrated
Seriously though, why doesn't anyone talk about her? Whenever people try to name female scientists, they can only think of Curie.
>>8803332
Curie was unique not only because of her work, but also because she was a Polish immigrant in France, a frontline nurse in WW1, and died rather ironically of radium poisoning.
Noether was just a hard-working researcher and teacher, she never wanted recognition for herself.
I find it kinda strange that both of these women were really "humble" and did not seek glory, while it seems some guys like Heisenberg and the like were extremely full of themselves (rightly so.)
https://en.wikipedia.org/wiki/Centrifuge_Accommodations_Module
https://en.wikipedia.org/wiki/Overwhelmingly_Large_Telescope
https://en.wikipedia.org/wiki/Molten-Salt_Reactor_Experiment
https://en.wikipedia.org/wiki/Integral_fast_reactor
>>8802721
What's next, the inconceivably tremendously fuckhuge telescope?
Okay nerds how would you go about killing all the bees so the world and humanity dies?
>>8802452
I wonder what the ratio of dead bee/loss of life is.
>>8802452
We're doing pretty well on that so far. I'd just let people kesp going like they're going. Maybe start assassinating scientists trying to stop it from happening.
>>8802452
selectively breed a super race of varroa mites and release billions of them into the world
>>8799505
>>8799505
Who's Ted and why is he in prison?
>>8799508
https://en.wikipedia.org/wiki/Ted_Kaczynski
https://www.youtube.com/watch?v=o96XsGoWwSM
RATIONALIST MASTER RACE. Take the test to find out if your time spent in university was worth it.
http://programs.clearerthinking.org/how_rational_are_you_really_take_the_test.html#.WN9tBzuleL8
Why do they all look so androgynous?
OP here to show my scores across the board.
>>8795814
explain to me why it is worth my time to even take this test