elihu

71 ms·

841.
by elihu 5y ago
He was running ten amps over thin wires; of course that doesn't work. The problem there was that he was transmitting significant power at low voltage and high current. That doesn't say anything about the superiority of AC or DC.
842.
by elihu 5y ago
Actually, induction motors seem to be losing popularity in EVs, being replaced by permanent magnet motors which are more efficient (which also makes them easier to cool). And they're usually regarded as AC motors because they're
843.
by elihu 5y ago
AC won out historically because it's easy to change the voltage of AC using a transformer. If we reach a point where modern DC-DC converters are cheaper or better than a traditional transformer, then I don't see why we wouldn&#x27
844.
by elihu 5y ago
If we get a better understanding of what autism actually is, I'd expect we'd also establish more specific and accurate terms for it. I don't see any reason why it would just go away as a concept, though. It seems like it&#x
845.
by elihu 5y ago
It's still a thing. It's a lot of work though and it pretty much never makes financial sense versus just buying a used Leaf or something. But it's one way to get a car that's exactly what you want. I'm currently w
846.
by elihu 5y ago
I've never been audited, but several times I've had the IRS just tell me I did my return wrong and give me a bigger refund.
847.
by elihu 5y ago
Power delivery could be an issue. I guess it depends on how many ships a day you're serving. If there's just one or two a day, your infrastructure needs to handle short bursts at high capacity but then sits idle 90+ % of the tim
848.
by elihu 5y ago
Because in the time it takes to physically swap some batteries and charge others, you could have just charged them all and that would be simpler and easier. One of the things that's counterintuitive about batteries is that if a battery
849.
by elihu 5y ago
I'm skeptical that onloading and offloading containers of batteries is something that can be done quickly and easily on average. Suppose you're using batteries (probably lithium iron phosphate if it's based on current tech)
850.
by elihu 5y ago
It's hard to get a sense of what the majority is from that, but it seems like there's a lot of ships that are hugging the shorelines and a lot that aren't.
851.
by elihu 5y ago
> "A farmer friend told me the same thing is happening in the UK. The cost of fertilizer has gone up so much due to the Ukraine War that some farmers are not even planting." Actually, fertilizer shortages were already a thing b
852.
by elihu 5y ago
That's tricky, though -- if you just query the acceleration structure for the nearest lights, you might discard some that are important but far away, and that introduces bias into the results. The unbiased thing would be to use all the
853.
by elihu 5y ago
I'm not an expert, but as I understand it there isn't a complete theory about why high-temperature superconductors work, so inventing new HTS types is sort of a matter of just trying different materials and hoping you get lucky.
854.
by elihu 5y ago
The way people use computers and the Internet has been a huge change. Wikipedia sounds like something that couldn't possibly work, except it turns out that it (mostly) does. Self-landing rockets are pretty impressive. I think the ri
855.
by elihu 5y ago
I like the saying that software isn't released, it's allowed to escape.
856.
by elihu 5y ago
My bus route wound over and between a couple of hills, so a radio might not have worked.
857.
by elihu 5y ago
> They also have to have at least one extra bus and driver on standby every day because diesel buses breakdown regularly during a route and they have to go out with a second bus and pick up the kids and finish the route. I distinctly rem
858.
by elihu 5y ago
If there's a major power outage, the school probably won't be in session either. Though getting the students home might be a problem if power goes out in the middle of a school day and the buses haven't charged enough to get
859.
by elihu 5y ago
When it comes to batteries, I can't imagine safety not being a major design consideration. EV fires are maybe exaggerated a bit in the media because of the novelty whereas ICE vehicle fires aren't as newsworthy, but they're
860.
by elihu 5y ago
LFP doesn't use nickel or cobalt, which are usually the most expensive materials. Lithium prices will probably go up, but I don't think they're hugely significant yet. LFP cells also use plastic, iron, fertilizer (phosphate
861.
by elihu 5y ago
LFP batteries don't handle below-freezing temperatures very well, but that could be mitigated by using insulation and water cooling/heating depending on the time of year. Also maybe hooking them up to a pre-heater system that get
862.
by elihu 5y ago
I'm not 100% sure what the situation is, but I think the issue is that if some car manufacturer tried to import a large quantity of LFP cells from China they might be sued if they don't pay the patent licensing fees. Thus the pri
863.
by elihu 5y ago
Apparently there's an important patent on lithium iron phosphate (LFP) batteries that expires next month (on April 27th). I'm hoping that changes the economics on batteries and that LFPs become cheap and abundant, and widely avai
864.
by elihu 5y ago
It's a different kind of business. Apple doesn't fab the chips, that's done by TSMC.
865.
by elihu 5y ago
You don't think that Intel spending substantially more on stock buybacks and dividends than TSMC and Samsung over the last twenty years had any notable impact on their competitiveness? To me, the article seems spot-on.
866.
by elihu 5y ago
Wow, that's really weird: https://en.wikipedia.org/wiki/Pycnandra_acuminata Is there a danger of the trees themselves becoming hazardous waste if they accumulate the wrong kinds of metals? Though I suppose that c
867.
by elihu 5y ago
A lot of people do things they feel conflicted about, usually because they need the money but sometimes also because they aren't sure if what they're doing is beneficial or detrimental to society on average. Those people's s
868.
by elihu 5y ago
I know they would and a lot of people buy new cars at that frequency, but the old cars are going to keep getting used by somebody as long as they still function. If the infotainment system is dated and doesn't interoperate with the la
869.
by elihu 5y ago
I have a Yamaha MOX-8 that I like for the most part. I find the interface generally overcomplicated and confusing. I think it sounds pretty good as a piano, but there are probably synthesizers out there that do piano better. The weighted
870.
by elihu 5y ago
It's especially problematic for cars to be consumer electronics products, because the lifetime of a car can easily be twenty or thirty years. That's not the expectation for most consumer electronics devices.

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