Cocodapuf @ Cocodapuf @lemmy.world

Posts

2

Comments

1,542

Joined

2 yr. ago

I mean, lead is a very common element and can have many legitimate uses. If we're talking about using some amount of lead in a camera sensor, do understand how tiny camera sensors are. This is likely a very insignificant amount of lead. And it will be fused into this sensor, it's not likely to ever leave the confines of the component's plastic casing, behind a lens, with a phone. That's very different from say, mixing it into gasoline and burning it.

I've heard there's been some real breakthroughs in perovskite for solar cells in just the last few years. As you said, chemical instability is supposed to be their primary weakness, but my understanding is that progress has been made in finding the perfect chemical makeup for the "sandwiching" materials between layers of perovskite. I'm pretty sure that "perfect" chemical makeup is the proprietary trade secret variety, so I don't really know much more about it.

And admittedly, I've never been in the field of materials science, so you're much more of an expert in this area. But I've been following a lot of green energy news, and I know promising progress is actively being made on perovskite.

Hah, I appreciate the honesty though 😂

Man up

Fuck off. You can take that shit elsewhere. Grow a conscience.

I think it's a few years late for purely negative action to be useful here.

I actually disagree with that. If we end the flow of weapons and funding to Israel, we'd see a totally different behavior from Israel within the week.

The question is: glass some LARPers, or world war 3? If the former is not on the table, the latter is inevitable.

And this part, you're saying nuke them or else WW3? That rhetoric is as bad as theirs! If you can't think of any other solutions, then please, don't be part of the solution.

I mean, could be from Spain.

Beats headphones.

"Oh yeah those look cool. Did you want something that sounds good though?"

This is state sanctioned mass murder. This is state terror attacks across a national border. This is so unethical and obviously illegal, I don't know what else to say about it.

We need to distance ourselves from Israel. We need to stop giving them weapons. Right now, the taxes I pay go partially to arming them, I am partially responsible, and this is not "ok". I do not want to be doing this, I never wanted this...

Yeah, it's a messed up position. It's made more complicated by then being half right. People do often like having fewer choices. Making a streamlined OS that doesn't allow them access to the kernel or crucial components, that they literally can't break by accident, that is indeed an appealing feature to many. But it's not appealing because they're stupid, it's appealing they're rational.

This has always been Apple's method, make everything intuitive, easy to use for anyone and their mother. And a big part of that is removing all the extra clutter from the interface, all the options users would rarely if ever use. This is also the contentious part, removing the advanced options that power users might want access to.

But at least initially, they understood that the reason for doing all this, their goal, was to make their products better. These days it seems like they're less clear on that goal. The idea that they're "dumbing down" their products and controlling everything because their users are too stupid, this is a new attitude, and it shows a misunderstanding of the principals their company was built on. Apple was only successful because they made very good products which were comfortable to use. They certainly never won popularity through competitive pricing or having the most powerful machines...

Personally, I think it's a foolish move to be this controlling over their iOS ecosystem. This is really making the product inferior. Sideloading apps will not destroy their walled garden, it just gives power users the options they want. Apple should be afraid of losing more market share, they don't have all that much to lose...

Nah, not stupid. But yeah it's hard to do without leaving a very clear trail. I assume most engineers want to keep their job and their income.

But programmers tend to use some form of a "versioning" system like git. This will record everyone's changes to the codebase, when a change was made, what was changed, who changed it. And it allows you to go back and revert changes if something important broke. Very convenient for programmers, less convenient for sabotage.

Not with that attitude!

Lowering the orbit takes energy, too, unless you're relying solely on atmospheric drag.

Sure, but you can safely deorbit something from Leo with like 100 m/s of Delta v, you just need to dip into the atmosphere and then drag does the rest. Getting something to a sufficiently high graveyard orbit is more like 2000 Dv split between two burns. You'd need to stay with the trash for half an orbit and then do the second half of your burn, and then presumably you'd need to travel back to your original point, costing another 2000 Dv.

All together, going up could take 40x more propellant than going down.

If they can make progress on that kind of timeline, why wouldn't someone else be able to?

That's a fair point. Keep in mind though, it takes a while to get a whole constellation up in orbit and get all the kinks worked out, Starlink was first usable in 2020. So in total it took them in the area of 14 years from start to finish. It's also worth noting, that nobody in the space industry has really ever been able to move as fast as spaceX, they're something of an anomaly, not the norm.

So could a new company do it in 14 years? Yeah, that's definitely possible. It could happen by 2039, but I wouldn't put money on it. 25 years seems more likely.

Again, the only possible player that could do that any time soon is blue origin/Amazon.

Stoke Space is working on a fully reusable rocket though, I'm really impressed with their rocket concept, some very smart design choices were made. They do have working hardware and have demonstrated their core engine. But I have no idea how close they are to first launch tests, I expect it will be a while

That's a fair point. The alternative is taking things up to a "graveyard orbit" somewhere between LEO and GSO, to a particularly unpopular altitude, where nobody's fighting for real estate. Satellites can sit there indefinitely, you could even clump them up in a big ball, the tiny pull of gravity they have is actually enough to keep them bunched together.

The only problem with that plan is that it takes a lot of energy to raise an orbit that much, I'm not sure how to make that feasible.

Yeah, it's a bad situation. I'm against monopolies, but I also see how filling the sky with redundant satellites is a terrible plan, so I don't like the idea of lots of competition either.

I think low orbit satellite communications is a pretty awesome concept. It has the potential to become like a second Internet backbone, but a backbone that can bring data directly to users without the additional router hops that local ISPs introduce. On paper, it's amazingly efficient and can distribute service to all of the world... But in practice the business and management side is deeply problematic. One company should absolutely not be in charge of global Internet service. And one country would not be any better.

The only solution I can see is to make it safe and feasible to have way more satellites operating in low earth orbit. I'm really not sure what that solution might look like...

Here's an off-the-cuff idea though: One solution could be an extremely robust low earth orbit maintenance and "pruning" system. All satellites would need to be monitored by third parties. And those third parties would need the authority and ability to quickly deorbit (prune) any satellite that deviates from its exact expected orbit. If satellites can ensure no deviation from their path and can safely maneuver to avoid collisions, it could be possible for many more satellites to safely share an orbital altitude.

Well this wouldn't be that. It would be a competitor to space junk, so increase the number of satellites in orbit by say 25%.

Well yeah, blue origin has already successfully orbited their rocket. Their rocket which has a 45 ton to low earth orbit payload capacity, about the same as the Saturn V (so actually impressive as fuck).

So the head start is what keeps Honda from out competing them. They're at least 10 years ahead of Honda (but likely more). And BO is solely focused on space, Honda on the other hand isn't going to prioritize that arm of development over others. So I can't really see Honda winning that sprint, if they're not totally committed to the race.

We should keep US weapons out of it too

Time for the AI teams to suddenly have tech issues.

"Sorry, the whole codebase is just gone! We have no idea what happened!"

"Must have been the S3 storage"