jabl

11 ms·

121.
by jabl 10mo ago
I believe Google has developed a Rust implementation of the binder driver which was recently merged, and they are apparently planning to remove the original C implementation. Considering binder is essential for Android that would be a major
122.
by jabl 10mo ago
> Electrification of the economy, which is a thing that at least the US is way behind on, is going to be a massive driver of electricity demand across the world. And a lot of countries are going to benefit from cost savings there. Not ha
123.
by jabl 10mo ago
Sure. Just like coaling stations and bunker fuel facilities didn't pop into existence with the snap of a finger either. Yet somehow they were built, eventually.
124.
by jabl 10mo ago
French nuclear submarines run on 7% enriched fuel, so it's certainly possible to build military submarines that don't need HEU.
125.
by jabl 10mo ago
> eventually larger ocean going vessels, which I predict will go diesel-electric before they go all electric. Diesel-electric, particularly when using Azipods, is great when you need to do a lot of maneuvering in narrow spaces like ports
126.
by jabl 10mo ago
Other companies saw that IBM effectively lost control over their platform (and thus lost a large revenue stream), and are determined to not make the same mistake. That's a long running effort, going all the way from lobbying (DMCA and
127.
by jabl 10mo ago
> As a lifelong Toyota fan, I agree they are miserable to work on, especially the electronics. I had a Toyota Yaris a couple of decades ago. Very reliable, very few issues. But some routine things like replacing headlights were completel
128.
by jabl 10mo ago
At least over here where we have mandatory inspections you can find statistics on percentage of cars which fail the inspections, broken down by brand and model. Toyota seems to consistently place in the top.
129.
by jabl 10mo ago
I coworker of my mother some 20-25 years ago bought a new car. Drove it until it stopped and refused to go further. Called some road service who upon inspecting it announced that she had run out of gas. She was surprised, "Cars still n
130.
by jabl 10mo ago
Not in 1905, no. I believe water-glycol mixes became widely used in the 1920'ies. But without glycol, water is an even better heat transfer agent. Shame about the freezing thing, though.
131.
by jabl 10mo ago
Well, it gets really complex. Yes, specific heat matters, but as you say so does the heat transfer coefficient. And the viscosity. And is the flow laminar or turbulent? Etc. There are various figures of merit, such as the Mouromtseff numbe
132.
by jabl 10mo ago
It's of course possible to design engines to be oil cooled, though water-glycol tends to be preferred due to about twice the specific heat capacity, meaning smaller coolant channels, radiators, and fans are required.
133.
by jabl 10mo ago
Just pour coolant in via the oil cap. It'll be fine. /s
134.
by jabl 10mo ago
Yeah, but that's because general aviation engines are stuck in a time capsule from the 1940'ies, not because they are particularly good engines by today's standards. Exception being Rotax on the low end.
135.
by jabl 10mo ago
I think they lost it when they started dictating what kind of engines teams can use. Just limit the max fuel flow, and then let the teams go wild. Want to use a gas turbine? Go for it!
136.
by jabl 10mo ago
I once got free tickets to a race (DTM, German touring cars), and to be honest I don't know why people go to them. You saw a small section of the track, and occasionally cars whizzed by. No idea who was in the lead, who was behind, or
137.
by jabl 10mo ago
Shame they're getting rid of the MGU-H just when it's starting to roll out in production road cars (the latest 911, specifically).
138.
by jabl 10mo ago
> Although EVs now have to pay 3p per mile from 2028, which is a big change. This is interesting, how is this accomplished? Over here there was some proposal some years ago to move to a per-mile taxation, with higher tax in congested are
139.
by jabl 10mo ago
From your past posting history, I presume that you're implying this makes RISC-V better? Do we have any data showing that having a dedicated zero register is better than a short and canonical instruction for zeroing an arbitrary regist
140.
by jabl 11mo ago
> I've also know some trucks used in mines that don't even need charging. The electricity generated when descending with a full load is enough to power the empty truck back uphill. Mines tend to be underground, or then a big ho
141.
by jabl 11mo ago
There's pipework for circulating air inside it when they want to charge/discharge it, but yes, essentially it's mostly tons of sand. They have resistors for charging it with electricity (resistors heat the air, air is circula
142.
by jabl 11mo ago
They tried in southern Finland not long ago. At great expense and spending a lot of time they managed to drill down 6-7 km until they figured out that the porosity of the rock down there was so poor that it was impossible to make the projec
143.
by jabl 11mo ago
> And even with perfect insulation, you will loose approximately 30 to 40% of heat in your piping. At least here in Finland the norm is losses in the range of 5-20%, with the upper end of the scale for smaller scale networks with smaller
144.
by jabl 11mo ago
This was AFAIU a 'dry annealing' on a full scale power reactor: https://inis.iaea.org/records/505bf-gcq02 and https://inis.iaea.org/records/a42j1-np856 Not the whole reactor vessel thoug
145.
by jabl 11mo ago
> The only way to make a cheap synthetic fuel is from a nuclear reactor that produces heat in the 900C range (could be 700C or 1100C, but near there). You can't do that with solid fuel reactors, you need a liquid fueled reactor for
146.
by jabl 11mo ago
Many old LWR's have had their reactor vessels heat treated during a maintenance break to undo some of that neutron radiation damage and extend the life of the reactor. Not sure whether it would be possible to do something similar to a
147.
by jabl 11mo ago
You need to go tell the French that what they've been doing for decades isn't possible, then.
148.
by jabl 11mo ago
I found a brief from a research project that studied blends of silicone and butyl rubber for Mars applications at https://science.nasa.gov/wp-content/uploads/2023/11/r.anyszk... Also a more detailed vers
149.
by jabl 11mo ago
I can understand basalt, as that is abundant on Mars. But butyl rubber, from where do you get that? Synthetize from CO2 in the atmosphere might work on Mars but on an Asteroid? But if you go through the route of synthetizing from CO2, why b
150.
by jabl 11mo ago
All over the world really, AFAIU. And why not, it's non-flammable, rot-resistant, affordable and made from abundant raw materials. And yes, you should probably use gloves and a mask when working with it, but it's not carcinogenic

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