Veedrac

12 ms·

121.
by Veedrac 1y ago
They contain zero-order holds, but they also contain reconstruction filters. Ideal reconstruction filters have infinite width, which makes them clearly different in kind. And most DACs nowadays are Delta-Sigma, so the zero-order hold is on
122.
by Veedrac 1y ago
A pixel is simply not a point sample. A camera does not take point sample snapshots, it integrates lightfall over little rectangular areas. A modern display does not reconstruct an image the way a DAC reconstructs sounds, they render little
123.
by Veedrac 2y ago
Storage matters for widespread direct-consumer use of hydrogen, but in the example I gave it's not a big deal: just put the electrolyzer next to the solar panels. You only need to store ~12h of hydrogen production, and burn it onsite.
124.
by Veedrac 2y ago
Hydrogen generation systems exist on the same balance. When the input electricity is expensive, you want to build them to be more efficient, and that costs money, in catalysts and low-loss reaction chambers and such. If a huge amount of ene
125.
by Veedrac 2y ago
We don't yet live in a world where electricity is reliably overproduced by 2x. Renewables are ~100% of the US's new electricity production, but still only a small fraction of its total electricity production.
126.
by Veedrac 2y ago
The author misses a perhaps unintuitive point: the cost of storage depends also on the cost of energy. By the time you've overbuilt 2x, a full extra 100% of your demand is sitting around literally free at odd hours. Traditionally, mo
127.
by Veedrac 2y ago
> Lots of people predict it Yup. 2009 https://news.ycombinator.com/item?id=855684 2017 https://news.ycombinator.com/item?id=14790251 2018 https://news.ycombinator.com/item?id=17184054 20
128.
by Veedrac 2y ago
The author of the technique has an explanation of why screen-alined dithering is hard in their FAQ. https://github.com/runevision/Dither3D/discussions/12 Particular, it's hard to deal with anisotropy, a
129.
by Veedrac 2y ago
Note that it's black to move and black's pawn moves upwards. All move but one has instant counterplay from white. Here's the board; you can enable the engine to get the answer: https://lichess.org/analysis&#x2
130.
by Veedrac 2y ago
It's not obvious to me that this is worth much over (x > 9) + (x > 99) + (x > 999) + (x > 9999) (x > CONST) does tend to need a pair of instructions to get the status flag into a register, but those can also fus
131.
by Veedrac 2y ago
It's just someone who involves themselves in AI but as a slur.
132.
by Veedrac 2y ago
It's true Falcon 9 has flown for a long time, but its growth rate has been a shockingly consistent 1.6x mass to orbit YoY since the beginning, so at any given time the majority of flights occurred in the previous two years.
133.
by Veedrac 2y ago
The Starship second stage is surprisingly not all that heavy compared to the 78t Shuttle orbiter dry mass, despite the many-fold difference in volume and payload, plus Starship needing to be a legitimate second stage rather than just an orb
134.
by Veedrac 2y ago
Compression and tension are quite different loads. There have been rockets in history that would collapse under their own weight unpressurized. Neutron's second stage is a hung tank for similar reasons. Bucking is a pain. Super Heavy c
135.
by Veedrac 2y ago
"The robotaxi has no plug" — Elon Musk
136.
by Veedrac 2y ago
That paper is unserious. It is filled with unjustified assertions, adjectives and emotional appeals, M$-isms like ‘BigTech’, and basic misunderstandings of mathematical theory clearly being sold to a lay audience.
137.
by Veedrac 2y ago
It's not just that we have $25/y now and had ~$24B/y then, to suggest it is practical. Costs are also vastly reduced over those benchmarks. Starship HLS cost the government under $3B. For that same price you could buy 30 Falc
138.
by Veedrac 2y ago
> Wake me up when a LLM figures out stable fusion or room temperature superconductors. Man, the goalposts these days.
139.
by Veedrac 2y ago
Thanks, that makes the position much clearer. Some questions: You say, “if there's enough pressure to make a little crack, then the fluid can instantly expand and immediately make a big crack”. My admittedly quite surface level view of
140.
by Veedrac 2y ago
cf. "but I wish they finished writing the equations out" The article mentions EGS but, as far as I could tell, only seemed to present it to contrast it with the claim that Quaise is using a worse single-bore strategy. If I'm
141.
by Veedrac 2y ago
Thanks for the reply! I'm afraid I'm not really following the argument though. I don't have the technical background to judge how economical EGS is or not, I just want to understand this energy-based argument. I checked to be
142.
by Veedrac 2y ago
This is a really interesting perspective but I wish they finished writing the equations out. My attempt at verification didn't match. Per [1], “[wells] with a regular production casing diameter of 200-250 mm have an average capacity of
143.
by Veedrac 2y ago
The problem is dominantly that with traditional techniques the US doesn't have useful geothermal energy resources, so not having geothermal energy historically doesn't mean that newer approaches that aim to work in far more areas
144.
by Veedrac 2y ago
I think the most straightforward illustration of Neuralink's demonstrated capabilities is Webgrid. Noland, the first participant who has had Neuralink for a while (though has reduced signal because of thread retractions) scored 9.51 BP
145.
by Veedrac 2y ago
Not qualitatively. Most places in space have direct view of the sun, and radiators work fine. The problem of scale is the same either way, and it's probably cheaper to scale the radiators than to scale the solar panels and add batterie
146.
by Veedrac 2y ago
There is literally a header in the pdf titled ‘Maintenance’ that answers these questions.
147.
by Veedrac 2y ago
> you should not go like "cooling in space is free", It is baffling me how much I'm defending this proposal because I don't actually think it's a sensible company but they really really do not do this.
148.
by Veedrac 2y ago
This is literally covered multiple times in the pdf.
149.
by Veedrac 2y ago
From the paper, > As conduction and convection to the environment are not available in space, this means the data center will require radiators capable of radiatively dissipating gigawatts of thermal load. [...] This component represents
150.
by Veedrac 2y ago
Weird to call it fraud for not having mentioned or calculated what's literally the first most visible thing you see on their front page. https://www.lumenorbit.com/

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