Threads by latest replies - Page 3146

(22 replies)

Math Self Learning Discord

No.13477929 ViewReplyOriginalReport
Does this exist? If not, who wants to help me make one?
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(7 replies)

Blackhole Limitation

No.13479594 ViewReplyOriginalReport
Can a blackhole become too massive and explode? Is there a limitation to the size and mass of a blackhole? What would be the ramifications if this is true?
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(5 replies)

Autophagy and heat+cold shocks

No.13472552 ViewReplyOriginalReport
Can anyone give me some insight
Is it the relative "distance" between the cold and hot temperatures that instigates autophagy, or is it a set temperature from some body normalized temp?

If I were to take a "room temperature" shower right now, at rest, it would feel like nothing. But if I go run my brains out in the summer heat and come back, it'll be pretty damn cold.

So does this instigate autophagy the same way it would if I were to take a "cold shower" from a rest temperature?
Is the cold/hot autophagy instigation just relative?

t. a guy who doesn't want to pay for bullshit like "cryotherapy" and saunas
(5 replies)
No.13478980 ViewReplyOriginalReport
why havent we developed a machine to work someone out without any of the felt effort?
(12 replies)
No.13474759 ViewReplyOriginalReport
Are proofs ultimately relative constructs or are they constructs of relations?

>When I think about it I wonder if this question's nature helps explain why so many humans go conspiracy crazy making associations and links between anything and everything.
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(46 replies)

Urban Cooling

No.13469119 ViewReplyOriginalReport
A Saudi gives you a dump truck of money and asks you to design a city for his country, and make it comfortable to walk around in the street no matter the sun. What do you do?
This isn't a thread about muh global warming, it's a thread about the urban heat island effect.

I would build rows of towers running east-west, and have shiny aluminumized fabric running between the towers to shade the streets and lowrise buildings below.

I would have narrow, car-free streets so the towers can be only a few feet taller than the tops of the low rises, and use light rail to move people. Parking garages would be located outside the city instead of inside them, and people would rent stalls for their cars and use them when traveling outside the city.

All buildings would be statutorily limited to being low-rises, and have aluminumized awnings covering their rooves. For the air conditioners on the rooves, they will vent their heat collected from inside the low rise into a looping channel that is itself cooled by a large industrial ammonia air conditioner, and then vent that heat up a dedicated draft tower which doubles as a vent for any ammonia leaks.

The advantages of this are that you don't have to paint asphalt roads with high albedo treatments that cost $20k per lane-mile, you don't have to have "green rooves" you don't have to mandate cladding for buildings, you don't have to spend billions on freeway networks, and much more.
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(5 replies)
No.13479345 ViewReplyOriginalReport
Just curious but how do we not know if pi + e is rational or irrational?

What kind of mathematics would want need to study if they wanted to study stuff like that?

Is finding if its rational as simple as finding a fraction that is equal to pi + e?

Would knowing this have any real world application to material or computer science?
(21 replies)
No.13478002 ViewReplyOriginalReport
Should I put my gf in the acknowledgments for my masters thesis? She was very supportive throughout and i would like to marry her someday.

We’ve been dating for two years.
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(5 replies)

How long can I survive if I got nothing to drink but my pee?

No.13479522 ViewReplyOriginalReport
So, let's say I am in some island or desert stranded and need to maximize my chances of survival. How long can I avoid dehydration by drinking my pee until it is too salty or just not hydrating anymore?
(5 replies)

Boolean operation on polygons

No.13475339 ViewReplyOriginalReport
Searching for an algorithm to union two polygons with known vertices. Does anyone have a clue about this?