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Comment Re:But not practical everywhere (Score 1) 164

I live in rural America, and an EV charging infrastructure is largely non-existent. In concept, EVs have their merits, but in execution, they are not usable everywhere.

I live in rural America, and EVs are great here. Oh, public charging infrastructure mostly doesn't exist, but that's fine because I have electricity -- get this -- at my house!. I even have flush toilets, 'cause we're high class. The nearest Supercharger is ~100 miles away, but I have a garage, and a barn, and I put EV chargers in both. For normal daily driving, it works fine to just charge at home -- car is fully charged every morning -- and when I go on a long trip, well, the Supercharger network has me covered.

Works perfectly.

Comment Re: Shame they didn’t cover NOx, SOx, etc as (Score 1) 164

So you are willing to pay out another $10K eventually for a battery just so that you can plug in at home?

It's not clear that will ever be needed. EV batteries don't just stop working (barring some unusual fault); they just gradually decline in capacity, and the decline is very slow after the first 1-2 years. So expect to have 95% of capacity after two years, 80% after a decade, 60% after two decades, 50% after three, etc.

So it's just a question of when the capacity drops so low that the vehicle no longer has enough range -- but over time charging infrastructure is going to get better and better, so long range will become less and less important. Also, batteries are going to get cheaper.

So, yeah, it seems entirely reasonable to me to replace the battery in 20 years (if you haven't replaced the vehicle by then). Especially since the fuel savings over that time will far more than cover the replacement cost, even if the replacement cost hasn't come down, which it will!

Comment Re:CFC-free foam caused it (Score 1) 93

It was said at the time that the white paint on the early shuttle tanks served to also keep the foam together and reduce drag on it.

They scrapped it to save money and increase payload by a tiny fraction. But mostly to save money.

Engineers: this is necessary.
NASA Bean Counters: nah.

Every freakin' time.

Comment Re:These people are hallucinating (Score 1) 314

An implication of a physically implemented "superintelligence" would be that it needs to have much more computing power than a human brain. There are scientifically sound indicators (not proof, just plausibility) that no such device can be built in this physical universe, hence a machine that is a "superintelligence" is not physically possible.

What are these scientifically-sound indicators?

Comment Re:Spoiler alert (Score 1) 86

Interesting.

I'm building a solar battery from LTO cells and am now wondering about adding a simple square driver.

Gotta see if they're NMC or not. 20,000 cycle rating natively might go to 40,000?

Quote:
```
The length of relaxation period was
the same as current pulse, resulting in a Duty Ratio of 50% under PC charg-
ing. The average current for all three charging modes were kept the same
(1C, i.e., 2.2 A), thus the current during PC charging (2C, i.e., 4.4 A) was
twice as large as that during CC charging.
```

Comment Re:Do people realize this is nuclear energy? (Score 1) 41

> Only the Soviets were so uncaring for public safety to build a nuclear power plant like that,

Years ago a commenter here claimed to have been involved with Chernobyl and the way it went down is that a grad student in nuclear engineering wanted to run his pet theory experiment on the Chernobyl reactor.

Everybody said no up and down the chain.

Bu his father was high up in the Politburo and ordered it.

Soviets do what they're told.

It sounds plausible enough that a smart researcher could probably find the father and son from records.

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