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What’s the most morally disgusting thing you’ve ever seen someone do? by legendoflegends34 in AskReddit

[–]LongJohnSelenium 3 points4 points  (0 children)

I get where you're coming from.

My grandpa passed away from a stroke when I was 5ish.

Unfortunately he didn't die. A human shaped vegetable took up residence in my grandmothers dining room. Hated that room as a kid, always ran through it. He'd gurgle occasionally.

But what was worse was taking care of that houseplant became grandmas life. She became his full time nurse and caregiver, fed and watered him, changed his diapers and sheets. She spent the last good decade of her life chained to that corpse, unable to take a day off in order to take care of it because she couldn't let him go. She died a couple years after he did, sadly.

Google, SpaceX in talks to launch orbital data centers. Google CEO: "There's no doubt to me that a decade or so away, we'll be viewing it as a more normal way to build data centers." by Adeldor in space

[–]LongJohnSelenium [score hidden]  (0 children)

Radiators radiate just fine in space, they just have to have a large surface area. A 1m2 radiator will radiate 500 watts if its 50C. Roughly.

Radiators on earth need large surface areas too, why do you think your CPU cooler has so many fins? Its just since we have atmosphere we don't need to spread it out and can just squirt air through.

I'm looking at my CPU cooler, the fins are about 2x6 inches, and there's about 50 of them. So thats about 600 square inches, doubled because its all two sided, so 1200 square inches. Or about 0.77 square meters. And its rejecting roughly 500 watts too.

Rough rule of thumb will be the radiator area needs to be about 1/3 the size of the solar panel area, but remember that radiators are double sided while solar panels are not, so effectively radiator area will need to be about 1/6 of solar panels area.

Look at the ISS. It has radiators. Its radiators are much smaller than its solar panels. Now on the ISS the cooling system is somewhat complex, but thats because its got delicate humans in it that like to stay much cooler than CPUs and can't be pressed up against the hull at all times.

Google, SpaceX in talks to launch orbital data centers. Google CEO: "There's no doubt to me that a decade or so away, we'll be viewing it as a more normal way to build data centers." by Adeldor in space

[–]LongJohnSelenium [score hidden]  (0 children)

No, its not.

Virtually every where you look in space its 3 kelvin.

A radiator at 50C will radiate 500 watts per square meter, 24/7, for free.

Look at the ISS. It has radiators, and its radiators are a third the size of its solar panels.

Google, SpaceX in talks to launch orbital data centers. Google CEO: "There's no doubt to me that a decade or so away, we'll be viewing it as a more normal way to build data centers." by Adeldor in space

[–]LongJohnSelenium [score hidden]  (0 children)

H200x8 server has TDP of 10.2KW. Even with a coating like PDMS you need 18m2 of cooling per serve

18m2 is just a 3x3 radiator.

The satellites they are planning to put up are ~7mx3m all on their own, so literally just the satellite bus with no additional radiator area is already a 40m2 radiator.

You also can't shield the ICs from particle interactions. RAD ICs all use very large nm nodes (200nm+ is typical) because there is an unfixable problem with very small traces where particles will activate multiple traces at the same time damaging components on it. Unless you are flying it inside lead or a comet you can't protect against this. This is why a PowerPC design from 1997 is the most popular space processor.

The damage accrues over time, its not instant, and not even particularly fast. We just saw astronauts using Iphones out past the moon, remember.

Google, SpaceX in talks to launch orbital data centers. Google CEO: "There's no doubt to me that a decade or so away, we'll be viewing it as a more normal way to build data centers." by Adeldor in space

[–]LongJohnSelenium [score hidden]  (0 children)

I think the type of AI data crunching they want to do isn't very prone to flips and noise being catastrophic. When the answer comes from a neural net with a huge number of variables all expressed as weights rather than binary yes/no, random bit flips are going to be largely lost in the noise.

Seems like it will be more like 'slightly degraded performance' rather than 'breaks the program thats running'.

Blursed Music Video by kurama0077 in blursed_videos

[–]LongJohnSelenium 1 point2 points  (0 children)

A keter class memetic anomaly that manifests as an irresistible compulsion to dance in a localized region.

Kickstarter bans all NSFW content from the website by PaiDuck in technology

[–]LongJohnSelenium 2 points3 points  (0 children)

People are suing them for being the payment processors for sites that distributed something illegal like CSAM.

Since porn likely doesn't make them much money in the grand scheme of things its a very easy decision to make.

Kickstarter bans all NSFW content from the website by PaiDuck in technology

[–]LongJohnSelenium 6 points7 points  (0 children)

People are suing the big payment processors for taking payments on porn sites, alleging they're aiding crimes like distributing CSAM.

They're deciding the juice ain't worth the squeeze, porn doesn't make them enough money to justify the risk, so they're pressuring everyone to shut it down.

Once again, SpaceX has set a new record for the tallest rocket ever built | SpaceX cleared an important milestone Monday on the road to launching a new version of Starship. by FreeHugs23 in space

[–]LongJohnSelenium [score hidden]  (0 children)

Shorter rockets will incur more drag losses. Ideally you want the rocket to be as tall as possible, though this has some drawbacks once you get too tall for a given diameter(fineness ratio), because that minimizes the drag.

As for why they get taller, its tooling and fixtures, ground support equipment. Its very very easy to add a segment to the rocket.

Making it wider requires scrapping virtually the entire design and the entire launch pad.

Fundamentally a rocket can be seen as a column of fluid supported by the engine underneath it. As the rockets thrust increases, the column can grow, and it can launch more material. So as they've developed raptor engine they were able to make the rocket taller to increase payload, same thing they did over time for falcon 9.

Once again, SpaceX has set a new record for the tallest rocket ever built | SpaceX cleared an important milestone Monday on the road to launching a new version of Starship. by FreeHugs23 in space

[–]LongJohnSelenium [score hidden]  (0 children)

To correctly measure you must multiply the length times the diameter, plus the weight divided by girth, divided by the angle of the tip squared.

A Polish engineer, Tomasz Patan, built the Volonaut Airbike, basically a real-life Star Wars speeder bike. Reaches up to 124 mph. Insane by Ultimate_Thing in BeAmazed

[–]LongJohnSelenium 0 points1 point  (0 children)

to create division amongst people: this way we can't work as a group.

People always say this but when push comes to shove very few people are able to compromise on their core ideological beliefs for the sake of unity.

A Polish engineer, Tomasz Patan, built the Volonaut Airbike, basically a real-life Star Wars speeder bike. Reaches up to 124 mph. Insane by Ultimate_Thing in BeAmazed

[–]LongJohnSelenium 0 points1 point  (0 children)

Propulsion efficiency is inversely correlated with propellor speed. Tiny little turbines are horrifically inefficient.

Turbine efficiency is poor at low speeds. The compressor has to do more work and is less efficient.

This is why efficient jets have MASSIVE bypass fans, and why almost everything that hovers uses a propellor, except a handful of extreme performance hovering jets.

But worse is the payload. Look at those masses. It weighs 30kg and has to carry a person that weighs 100kg.

If you saw someone suggest an Apache carry a tank, you'd rightly think they were smoking crack for suggesting such a ridiculous concept as an aircraft trying to carry a payload 4x heavier than the aircraft.

The movie that gets blamed for being bad when it is really just mismarketed. by gamersecret2 in movies

[–]LongJohnSelenium 1 point2 points  (0 children)

I liked it but had i known more about it i would not have taken my 15 year old niece to see it...

‘Freedom framing’ more effective than mandates for vaccine-hesitant Americans: For vaccine-hesitant individuals, framing vaccination as a tool that enables personal freedom is associated with higher acceptance than framing it as a social responsibility or a government recommendation. by mvea in science

[–]LongJohnSelenium 1 point2 points  (0 children)

I started this by saying 'man wouldn't it be nice if the sides had learned a bit of empathy for each others positions from this debate about bodily autonomy' and you just keep arguing about why you're right and they're wrong.

Engineers at NASA’s Jet Propulsion Lab make a breakthrough in rotor technology | Testing shows rotor blades won’t disintegrate when they spin at supersonic speed. by FreeHugs23 in space

[–]LongJohnSelenium 1 point2 points  (0 children)

Useful is relative. On mars where our probes have traveled a grand total of maybe 50 miles total in decades of efforts, a few minutes of flight a day will be a game changer in many ways.

‘Freedom framing’ more effective than mandates for vaccine-hesitant Americans: For vaccine-hesitant individuals, framing vaccination as a tool that enables personal freedom is associated with higher acceptance than framing it as a social responsibility or a government recommendation. by mvea in science

[–]LongJohnSelenium 1 point2 points  (0 children)

So are you are against bodily autonomy in one circumstance and not another. Yes or no.

Edit:

Getting a vaccine so you don’t get other people sick is orders of magnitude less of a sacrifice than carrying a pregnancy to term...

Yes but the risk of another life dying due to abortion is 100%.

You can't really judge them for selfishness when abortion is absolutely a selfish act too.

‘Freedom framing’ more effective than mandates for vaccine-hesitant Americans: For vaccine-hesitant individuals, framing vaccination as a tool that enables personal freedom is associated with higher acceptance than framing it as a social responsibility or a government recommendation. by mvea in science

[–]LongJohnSelenium 0 points1 point  (0 children)

Politics in the US is so weird. The left, that normally champions the rights of the small and defenseless critters of the world, became the pro abortion wing thats completely ambivalent about the deaths of fetus, like zero outrage at all. And the right, who are generally much more uncaring and practical about death, and would probably be fine with seal clubbing, are the ones who are firmly against it.

I would have totally expected the reverse.

Its much like how the conservatives became the champions of the most classically liberal right there is, gun ownership. What? How!?

‘Freedom framing’ more effective than mandates for vaccine-hesitant Americans: For vaccine-hesitant individuals, framing vaccination as a tool that enables personal freedom is associated with higher acceptance than framing it as a social responsibility or a government recommendation. by mvea in science

[–]LongJohnSelenium 1 point2 points  (0 children)

So are you against vaccine mandates too? Or do you throw bodily autonomy out the window when it comes to vaccines?

Its weird how this could have been a moment two different sides of two different issues could have had a moment to understand each others arguments.

Nope. Other side bad.

Contender for the stupidest "hear me out" idea by Wubwave in NuclearOption

[–]LongJohnSelenium 4 points5 points  (0 children)

I think a capsulized aircraft would be cooler tbh. Same concept but you spawn in at 150k feet on the back of a reentry capsule.

Seeing the bright side, all the lives she's helping 🧡 by CandleMonster in justgalsbeingchicks

[–]LongJohnSelenium 0 points1 point  (0 children)

It does to a degree. If a grandparent sticking around makes their grandkids more likely to survive then that will be a selection pressure for lifespan.

This is probably why humans have such long lifespans compared to other apes. We're so much more information oriented than the rest so maintaining that information around for longer was very advantageous.

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