usrusr

27 ms·

541.
by usrusr 2y ago
Compressed air is notoriously low-efficiency when you do it like in ye olden days, by venting the compression heat to the environment. A-CAES means capturing that heat, storing it separately and transferring it back into the decompression s
542.
by usrusr 2y ago
It's more capacity than just pumped hydro of identical head x volume: even if we ignore the "compressed spring" of the air involved, charging would require at least the energy for lifting the water plus the energy for heating
543.
by usrusr 2y ago
The compressor/turbine part will have predictable wear rates, not substantially different from what you see in fossil plants. The reservoirs will at some point see noticeable sediment buildup, but not at all comparable with surface pum
544.
by usrusr 2y ago
One thing that hasn't been mentioned in siblings yet: the bulk of the money, more if you lean further towards capacity in the capacity vs throughput decision, is in the excavation. This is not only a "forever" investment, it&
545.
by usrusr 2y ago
They don't really release water into the cavern, they release air out (through the turbine stages). The water is never really held back. It's a floating counterbalance for keeping the air pressure constant (or mostly constant, con
546.
by usrusr 2y ago
I know of some pumped hydro sites that have been given up due to opex, with no clear change of mind due to changing circumstances in the decarbonisation age yet in sight. What they do have in common, I think, is low head. There's just
547.
by usrusr 2y ago
Compressed air and water head are in a balance, my physics instincts strongly suggest that the hypothetical sum is 2x the amount of energy stored by raising the water alone. But just like you I do hope that my instincts are missing somethin
548.
by usrusr 2y ago
I do wonder, regarding the hydrostor approach, if the stored energy (theoretical best, excluding all losses) is 2x the amount that would be stored if it was just the water head (mass x height), with air displacement served by an open connec
549.
by usrusr 2y ago
> with a pretty wide range of places it can be implemented How so? Yes, if you dammed up most valleys you could build a lot more capacity than humanity currently has, but that's because we don't really have that much. A factor
550.
by usrusr 2y ago
Israel has never formally left behind the "make it up as you go" spirit of the founding days. Not entirely surprising considering that they've never had a lack of more pressing problems. But a "who needs rules if we are
551.
by usrusr 2y ago
Doesn't say much about legality on paper, not even about how much of an invitation to selective enforcement it is, but looking at the Strava global heatmap through the lense of political systems is quite interesting: quite a bit of tra
552.
by usrusr 2y ago
Rigid flight needs exactly this, rigidity. But we do have inflatable flight: paragliders, first flight only a few years after the inflatoplane. Inflated only by the dynamic pressure from forward movement, but they make up what they lack in
553.
by usrusr 2y ago
But when do you really need a structure that has this exceptional strength on the happy path, but would still be good enough in terms of safety when pressure is lost? Unmanned aviation comes to mind, but the ratio between structural mass an
554.
by usrusr 2y ago
Separate facilities for work and life, interconnected by a rollercoaster commute. What else has sci-fi left out?
555.
by usrusr 2y ago
One key difference is that those celebrities of old were famous for things quite disconnected from the thing they endorsed. And even when it was close (athletes endorsing sports gear, Hollywood beauties endorsing hair products) the "th
556.
by usrusr 2y ago
Aka missing out on all the delicious profiling information approaches with later translation enjoy. There's no simple best answer.
557.
by usrusr 2y ago
Many things that can't be expressed in a given type system can still be expressed quite nicely in code generated for the domain data. You might experience some name elements getting forcibly moved from the types universe into accessor
558.
by usrusr 2y ago
Feels like cheating, next to the yaml of openapi anything will look good. And that's all while I'm still considering openapi one of the best things that have happened. But I've also been kind of holding my breath for typescri
559.
by usrusr 2y ago
But what's giving it it's seemingly clear cutoff boundary? I have trouble imagining anything in the nothingness of space taking the role of the forces that shape our atmospheric clouds. It feels a bit as if it was some arbitrary a
560.
by usrusr 2y ago
They absolutely do come with a goldilocks problem attached, best used in moderation, and require a bit of an aesthetic to develop. But what doesn't. What appears "clever" to the reader is actually dead simple train of thought
561.
by usrusr 2y ago
Really, top level functions? I fail to see their impact, outside of getting rid of ceremony around trivial code examples. You missed optional and named arguments in the list, those really change cost/benefit decisions in API design. (a
562.
by usrusr 2y ago
Scope functions are still huge. Yes, deep let chains can certainly be considered an antipattern (sometimes I like the approach of writing them, then transforming to more imperative for readability, I think readability peaks at a mix of impe
563.
by usrusr 2y ago
You can, you can even call the kotlin version that way if it happens to be on the classpath, but it's truly horrible ergonomics if for every call you have to guess between class-ref-otherargs and ref-otherargs forms. It's one of t
564.
by usrusr 2y ago
But null is still null, a very special non-reference signifying absence. And not some pretend-object that walks like a valid reference, swims like a valid reference, but somehow doesn't quite quack like one. The problems surfacing as
565.
by usrusr 2y ago
Lots of openings that offer in-country full remote (or something like full except for a quarterly meetup) in Germany. The impression I get is that the reasoning goes "if we tap the country-wide remote pool the perfect skillset match wi
566.
by usrusr 2y ago
So many years in my case that I'm really not sure that the counter would still hold.
567.
by usrusr 2y ago
How about "I'm building this thing and I want it to enjoy the unique combination of performance and memory safety offered by this technology"? It's certainly close to (1), but also a perfectly rational way to be a The Ru
568.
by usrusr 2y ago
> being able to search for functions by type signature is just plain convenient. It's certainly not all the way there, but now that we are over the mostly empty promises of encapsulation and (worse) trying to model the world with cl
569.
by usrusr 2y ago
Yeah, it doesn't really read like it matches much with the claim of the article that htmx is the rebirth of the MPA. But then on the other hand, the picture that builds in my mind turns more and more into "SPA, but everything is d
570.
by usrusr 2y ago
Why useless? Not an authentication scheme to and all other authentication schemes, but certainly a (much) better successor to the login cookie?

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