Absolutely. I wonder how many parents have been no contacted, SOs broken off with, friendships broken because of the Reddit hivemind's attitude. Pretty sure it's doing a huge amount of societal damage.
It's aluminum, glass, silicon, and some conductive metal. Surely you all have those materials.
And even if you don't make them yourselves, they aren't make and then burn like fossil fuels, they are durable infrastructure, you don't have to replace them often - they have an expected lifespan of >30 years. Buy as many as China will sell you, and once you have more than enough installed, you're good for a long time, regardless of whether they cut you off.
I think being reliant on the fossil fuel supply chain for so long, it's a bit tricky to mindset shift that once these things are installed, you're just good. And they're super fungible, you don't need any precision replacement parts, so you can make your own replacement parts if you want.
Yes, and France currently has a huge problem with keeping their plants online in the summer when it's too warm. And building new plants is outrageously expensive, see Hinkley Point C. Oh, ans you still need to import fission material, so you're dependent again on other countries. Nuclear was good in the 70s, now it's beaten thoroughly by renewables.
The Swedish government is very pro renewables, yet it is initiating large investments in nuclear because they believe it is the only way to ensure enough electricity for the larger and larger need for it in the near future. I’d say they have some good information to base that decision on, since you’re right it’s really expensive, but also it’s the only way to get large amounts of production when the sun ain’t shining (all winter here) and there’s no wind (also happens a lot in the colder months).
Right, a mix of uncorrelated sources is much more resilient than 100% renewables. Of the cleantech industry people I listen to, none of them are advocating for 100% renewables, you need a mix for grid reliability. But renewables can take on much of the load. And overpaneling can help significantly, and makes a lot more sense now that solar is super cheap.
Most panels have a 25 year 80% production warranty. Unless they're planning on being out of business, they're not planning on them lasting <25 years. So their useful life is significantly longer than 30 years, unless we come up with massively more efficient panels and the land opportunity cost is high enough that we should swap them out rather than let them just keep pumping out electricity.
Well, also, LLM servers get much more efficient with request queue depth >1 - tokens per second per gpu are massively higher with 100 concurrents than 1 on eg vllm.
>This point also deserves special mention. Most green technologies (solar panels, electric cars) also require a bunch of cobalt. Again, the "badness" seems to depend on your a priori evaluation of what the cobalt is being used for and not the cobalt mining itself.
Neither solar panels nor Lithium Iron Phosphate batteries require cobalt. Pretty sure all the emphasis on that is mainly meant to cloud things and try to paint these things as just as bad for the environment as eg coal, and apparently it's been very successful based on how frequently I see it repeated, but it's not true currently. It was true with NMC batteries, but I think those have fallen out of favor even in EVs, and grid scale is dominated by LFP. Don't think solar panels have ever needed cobalt, they're glass, aluminum, silicon, and a bit of silver/copper. Thin films have cadmium sometimes, but those aren't the ones in use en masse for solar farms.
Something to consider, and something I got a vivid demonstration of while playing with solar panels, DC arcs aren't self-extinguishing, unlike AC arcs. At one point I stuck a voltage probe in, and the arc stuck with it as I pulled the probe away. It also vaporized the metal tip of the probe.
My understanding is that DC breakers are somewhat prone to fires for this reason, too.
Heh - I vaporised a fairly large soldering iron tip (probably 4mm copper cylindrical bar?), when I fucked up soldering a connector to a big 7 cell ~6000mAHr LiPo battery and shorted the terminals. Quite how I didn't end up blind or in hospital I don't know. It reinforced just how much respect you need to pay to even low-ish voltage DC when the available current was likely able to exceed 700A by a fair margin momentarily. I think those cells were rated at 60C continuous and 120C for 5 seconds.
heh man, I'm glad you got out of that easy, I definitely wore safety glasses 100% of the time after my experience. I think a lifetime of experience with dangerous wall outlets and harmless little 1.5V/9V DC cells teaches us the wrong lessons about DC safety. I've since heard stories of wrenches exploding when they fall across EV high voltage battery terminals. Wrenches aren't supposed to be explosive.
The electricians I was working with also told me stories about how with the really big breakers, you don't stand in front of it when you throw it, because sometimes it can turn into a cloud of molten metal vapor. And that's just using them as intended.
A bunch of those big breakers require two people. One person in a flash suit and another with a 2m long pole around the first person. That way if an arc flash happens, the second person can yank the first person to safety without also getting hurt.
Ruins the fun and interrupts instilling respect deep into the bones of interns.
Allegedly
While on "work experience" from high school I was put on washing power lines coming straight out of the local power station near the ocean - lots of salt buildups to clear.
Same deal, flashover suits and occasional arcs .. and much laughter from the ground operators who drifted the work bucket close.
This reminds me of the sailor who [decided](https://darwinawards.com/darwin/darwin1999-50.html) to measure his internal resistance by pushing probes through the skin on his thumbs and electrocuted himself with the 9V multimeter battery.
Mythbusters time. Salty fluids can be remarkably conductive. Blood qualifies. What's interesting though is that you have to wonder if there isn't some contributing factor here, as a kid I did this quite a few times, so that's one more for that list of stuff that could have killed me. At the same time: I didn't have nice insulation piercing tips back then (I do now) and that may be what saved me. I will definitely not try this again.
Another story in the same line is that I heard that a horse got killed by contact with a lantern battery, but I don't have any reference for that, just a story by a family member that collected coaches.
I have a couple of those narrow escapes one of which led me to put a significant chunk of Eastern Amsterdam out of power. Another involved Beryllium oxide. 9 lives are barely enough.
Ah! Perhaps you are a member of the gigawatt club? Eligible for entry once you have accidentally tripped off 1000 MW of load or generation! No sweeping that under the table
You brought back a memory, a second hand one, but still a great story. A guy I knew long ago had emigrated from NZ to NL. His main claim to fame in NZ was that one day he showed up drunk for work. In itself this wouldn't have been memorable, if it wasn't for his job, which was to manage a relatively small hydro plant on one of three shifts. On that particular day the plant had to be brought back online after being out for service and since it was really old the synchronization was manual. You had to control the flow of the water, monitor two concentric spinning wheels with the one driven by the grid and the other driven by the local genny and when the phase markings were lined up 'just so' you had to engage this frankenstein level switch to couple the grid to the generator and from there on inertia did it's thing so you could open up the gate to allow more water so the generator would start leading the grid effectively generating power.
Any kid could do it. Probably. But not a drunk one and instead of waiting long enough for both wheels to stay synchronized indicating there would be only a small jump in phase he just said f* it and connected the two anyway. Predictably, this led to a serious disturbance to the grid which in turn caused a whole lot of other stuff to disengage. Since his chances for re-employment on account of his new-found fame were somewhat minimal he decided to emigrate instead :)
I'm the idiot that sent a fairly high voltage spike into the grid setting off a cascade. Even years later I do not fully understand how it could happen, you'd think the grid would be low impedance enough to absorb a spike like that. But it set off a cascade on a part of the local grid that was known to be weak.
> DC arcs aren't self-extinguishing, unlike AC arcs. At one point I stuck a voltage probe in, and the arc stuck with it as I pulled the probe away. It also vaporized the metal tip of the probe.
It would have self-extinguished if you waited long enough for the probe to vaporize.
> My understanding is that DC breakers are somewhat prone to fires for this reason, too.
I think its that DC breakers are more expensive, so people use AC rated breakers instead. They are both rated for 400v @10 amps, its the same thing right?
It turns out they are not, and most people, even electronics types rarely play with 200v+ of DC.
Doesn't lightning settle basically instantly, while still being decentralized? You're just trading signed transactions iirc, with settlement happening whenever.
The settlement happening whenever is a problem. Instant authorization is very different from a practical settlement model.
At least with card networks, there are layers of liability if solvency issues occur. There’s merchant protections from the acquiring bank and if for some reason the acquiring bank fails there is the guarantee of the card network.
On the issuing side there are chargebacks. I hate chargebacks as much as the next startup bro but consumer protections are a necessary aspect of a functioning payment rail. There are reasons we don’t use ACH for everything.
I think hand waving the pesky settlement details is absurd. The settlement process is the payment rail.
If you do want those protections you end up back with a custodial wallet, which brings us back to a centralized model.
I’m not arguing crypto doesn’t have its place in the universe, I am arguing it’s a very bad payments product.
I don’t have a horse in this race, but my only point was you don’t have to wait 15 minutes for a really decentralized experience. Yeah, you do need to be ok with not being able to later chargeback your grocery store, just like with cash. Which is fine for your example of groceries in hand, less great for large purchases over the internet.
Maybe we don’t need an alternative when Visa handles everything, but it might be nice to not pay a 3% markup on everything. Alternatively, we could try to be more like India and Brazil, which each built instant bank to bank transfer setups you can use at the grocery store, without the risks that come with losing debit/credit cards. Convenient without poor people with no rewards cards subsidizing everyone else to cover Visa’s take.
>Yeah, you do need to be ok with not being able to later chargeback your grocery store, just like with cash.
Well the reason that works is because in grocery stores you have a concept of card present so the liability shifts to the issuing bank... so there are no chargebacks. Concepts like card present and card not present demand a centralized authority and really can't exist in a decentralized payment rail, unless you're going to somehow invent decentralized pos hardware for merchants. Once you enter the world of atoms, you have re-introduced centralized trust into your payment rail though.
> Convenient without poor people with no rewards cards subsidizing everyone else to cover Visa’s take.
I fully agree. This is a crappy part of ccs and the best remedy is to disallow rewards programs for credit products. This isn't a fault of the card networks its a fault of issuing banks (and the airlines). Every crypto company in 2021 was offering 8% APY, you think those guys would have been better about this than Amex?
> Maybe we don’t need an alternative when Visa handles everything, but it might be nice to not pay a 3% markup on everything.
I'm actually not bothered by a take from the banks and networks involved. They are underwriting risk and affording insurances to me and the merchant. I guess my main argument is that it's good to have centralized insurance in money transfer facilitation. 3% is high and a failure of Dodd Frank. The Durbin Amendment should have reigned in cc fees and not just focused on debit interchange.
> Alternatively, we could try to be more like India and Brazil, which each built instant bank to bank transfer setups you can use at the grocery store, without the risks that come with losing debit/credit cards.
I don't disagree. As you pointed out it really comes down to the crappy reward programs from the issuing banks that make merchants and poor people suffer.
I don't mind crypto as an idea. I don't have a horse in the crypto race either. What I mind is the notion that it is somehow a viable payment rail. I'm sorry, it's been 20 years and crypto's best use case for payments has been buying acid on the internet because it was the only payment option.
I think one of the most interesting business stories in the world is about the guy who invented the Visa network, Dee Hock. It truly is a story of decentralization at its finest. John Coogan did a great video on him a couple of years ago I highly recommend: https://www.youtube.com/watch?v=RNbi2cUZt1o.
