elihu

20 ms·

241.
by elihu 3y ago
It's not propaganda. Cobalt and nickel are scarce resources, the mining of which is harmful, and they're not even necessary. Cobalt and nickel are basically used by auto manufacturers to make luxury supercars with slightly more r
242.
by elihu 3y ago
It might be like that in some places, but not everywhere. HVDC lines are pretty efficient. From this map it looks like Arizona, New Mexico, Texas, Florida, and presumably Regular Mexico could be major producers for the rest of the US. ht
243.
by elihu 3y ago
Ah, so I did. 8.1 kwh per brick sounds like a more substantial amount of energy. They'd need about 12,235 bricks at a 100m height, which is closer to practical. I'm still kind of skeptical. I mean, pumped hydroelectric storage
244.
by elihu 3y ago
That could be, though it's likely to be location specific. Areas with good hydroelectric might just have steady pricing -- solar during the day, hydro at night. EV owners often get reduced rates for charging at night; that could go aw
245.
by elihu 3y ago
"a day or two" would handle probably 90% of situations -- or 100% if there's enough solar overcapacity to power everything even on winter days (which probably involves good power grid connections to places like Arizona and Me
246.
by elihu 3y ago
Let's see: it takes 9.8 joules to lift 1 kg by 1m. Let's say the tower is 100m high. The video says the blocks are 30 tons. 1 joule is 0.000278 watt hours. 9.8 * 30000 * 100 * 0.000278 * 0.0001 = 0.81732 kilowatt hours per 30 t
247.
by elihu 3y ago
Depends what your starting assumptions are. Do you think we need enough lithium ion batteries to store 6 months of storage at the standard US energy consumption rate to get through winter? If you do, then you're right: we can't
248.
by elihu 3y ago
That does make sense; while you could run the geothermal 24/7, you might actually be better off only running it when you need to, since (as I understand it) geothermal can actually use up all the usable heat in an area, which can take
249.
by elihu 3y ago
Some ideas: Customers should be able to return for a full refund any products that have security vulnerabilities that aren't addressed within the support period. Companies could opt to participate in a source code escrow program where
250.
by elihu 3y ago
I'm not using a phone, but my first reaction was to lean closer and see if I had a hair stuck to my monitor.
251.
by elihu 3y ago
> TOI-332 b has a radius of about 3.2 Earth radii and an unusually large mass of 57.2 Earth masses, what yields a very high density—at a level of 9.6 g/cm3. The newfound planet orbits its host every 18.65 hours, at a distance of 0.0
252.
by elihu 3y ago
Thine Own Self. I just watched that a couple days ago. https://www.imdb.com/title/tt0708826/
253.
by elihu 3y ago
Banned by China. Probably more of a political/economic move than a real safety concern.
254.
by elihu 3y ago
From the article it sounds like this is just a normally expected thing, that time runs more slowly near a massive object, and shortly after the big bang everything was relatively close to a lot of other mass, so from our point of view it lo
255.
by elihu 3y ago
> "A mechanical heat pump is simply a heat pump without the electric motor – instead, the wind rotor is directly connected to the compressor(s) of the heat pump. This involves one less energy conversion, which makes the combination
256.
by elihu 3y ago
I think there are a lot of people who still care about wisdom and try to work on it. Our popular culture and economic and political systems don't always do a good job of encouraging or valuing wisdom. I think there are probably a lot
257.
by elihu 3y ago
> "The primary actor is a wise old man…" And that is why it is hard to call that a myth for our time. Young people’s contempt for the now-elderly generation (they’re Boomers) has reached incredible heights. At the risk of makin
258.
by elihu 3y ago
I don't think we've had anything like the 2020 fires in a long time (though the 2017 Gorge fire was pretty bad). Maybe the Tillamook burn was comparable? Field burning used to be a more common thing though, so it was a regular an
259.
by elihu 3y ago
I'm not sure. There must be some losses, but considering that motor controllers these days are fairly small and only need some modest active cooling I'd guess they're pretty efficient. For example, the motor controller that
260.
by elihu 3y ago
> The system relies on AI to optimize the solar array’s output and operate the motor at 88 percent efficiency; real-world DC electric motors have efficiencies of 75 to 80 percent. Meanwhile AC permanent magnet motors like the ones used i
261.
by elihu 3y ago
My impression (I'd have to do more testing to verify this) is that velostat is not very consistent if you use it as a through-mode FSR (electrical contacts on opposite sides of the FSR) but works quite a bit better as a shunt-mode FSR
262.
by elihu 3y ago
There are some reasonable ways to do pressure-sensitive buttons cheaply. I'm also working on an electronic instrument. What I do is glue felt on the back of a sheet of 1/8" birch ply (using liquid hide glue), and then laser
263.
by elihu 3y ago
If I understand right, the Harpejji uses individual per-string pickups and uses an electronic muting system. Touching a string to any of the frets completes a circuit that causes the onboard electronics to unmute that particular string. Th
264.
by elihu 3y ago
Haken Continuum, perhaps? The same Eaganmatrix engine used in the Continuum has also shown up in the Expressive E Osmose, so apparently Haken is willing to work with other companies to integrate their synth in more products -- and the resul
265.
by elihu 3y ago
Well, I think it comes down to whether the energy cost of active cooling is better or worse than resistive losses. Which one is better doesn't depend on cable length.
266.
by elihu 3y ago
Aluminum vs copper is a good example. Another is that we already do use superconducting transmission lines in a few places. We could do more of that, but presumably it's expensive to install and/or maintain otherwise we'd b
267.
by elihu 3y ago
It looks like it's paywalled, so I'm wondering what exactly "thinking about God" means in the context of this study? Were study participants told to think about God? Was there any test to determine whether they were in
268.
by elihu 3y ago
I think most code doesn't really stand on its own very well. In order to understand it, you need to know a number of other things that might not be obvious (especially if the code in question has bugs, or has been rewritten a number o
269.
by elihu 3y ago
That sounds like an interesting and useful technique, but he never gets around to explaining how the bull dies.
270.
by elihu 3y ago
You are on a ship, far from land. It appears to be taking on water. There are a thousand passengers, from whom they select a captain before each eight hour shift. Any one captain may only serve two shifts. The captain has some leeway to

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