jabl

24 ms·

391.
by jabl 2y ago
AFAIU modern diesels have lower combustion temperatures in order to limit NOx formation. I imagine this comes at a cost in thermodynamic efficiency. Similarly particle filters, catalytic converters and whatnot reduce efficiency via exhaust
392.
by jabl 2y ago
> I dunno what you’d even use for cushion fill that’d last anywhere near as long. Those are closer to 400% the price of synthetic stuff. Or more. AFAIU natural latex is an alternative to the ubiquitous polyurethane foam, and lasts longer
393.
by jabl 2y ago
Yes. But really, it was much worse in many ways. A 100 years ago, say, the people doing clothes repair for a living were desperately poor, and often being single women they often had to resort to prostitution to feed themselves as the incom
394.
by jabl 2y ago
> Clothing industry has somehow gotten by unscathed during all the environmental awareness that has spread in the past 20 years. I am pretty sure clothes are the #1 cause of the microplastics that have inundated the ocean and our water s
395.
by jabl 2y ago
It's sort of what this patch does, from https://lwn.net/ml/all/20241008144829.GG14587@noisy.programm... : > SCHED_IDLE, SCHED_BATCH and SCHED_NORMAL/OTHER get the lazy thing, FIFO, RR and DEADLINE get
396.
by jabl 2y ago
OTOH current day Russia doesn't have the yoke of communism around their neck. Is the level of corruption worse than the economic inefficiency of communism? I don't know, possibly? As for nukes, nuclear saber rattling seems to be o
397.
by jabl 2y ago
> battleships are obsolete not because they are easy to sink but because airplanes are more versitle for most purposes. The main reason really is range. A battleship can obliterate a target within about 25 km (yes, I know the guns can sh
398.
by jabl 2y ago
> Looks like that would have been the new Riverside Museum (very distinctive Zaha Hadid building in an open area) rather than the old Transport Museum? Ah yes, that must be it, looking it up online I recognize the building. It appeared v
399.
by jabl 2y ago
Indeed! It blew my mind when I read that factoid in the Glasgow transportation museum(?) back when I visited about 10 years ago. FWIW, a similar percentage of the world's steam locomotives were also made in the area in the same timefra
400.
by jabl 2y ago
I believe most use cases where really shallow draft is required has been taken over by waterjets. Less efficient than propellers, particularly at slow speed, but more efficient than paddle wheels, AFAIU. Then there's other things like
401.
by jabl 2y ago
Over here there's a paddle wheel tourist ship (no steam though, just plain diesel). But the cheeky thing is that it's actually powered by propellers, the paddle wheel is just turned around by a small electric (hydraulic?) motor fo
402.
by jabl 2y ago
As an aside, the GNU Fortran compiler (gfortran) also provides a quad precision floating point type, similar to this one. If the target supports native quad precision it uses that, otherwise it falls back to software emulation. Math functio
403.
by jabl 2y ago
One thing I liked about a Vernor Vinge sci-fi novel I read once was the concept of "computer archeologist". Spool the evolution of software forwards a few centuries, and we'll have layers upon layers of software where instead
404.
by jabl 2y ago
I did see it, but was unsure if you meant you were compiling for a 32-bit target on a 64-bit host.
405.
by jabl 2y ago
Was this with x86_64? The point of the parent was about x86_32, I believe.
406.
by jabl 2y ago
AFAIU all 64-bit Linux ports have used 64-bit time_t, off_t, ino_t from the beginning. All this is about transitioning 32-bit Linux to 64-bit time_t.
407.
by jabl 2y ago
There was a big project to re-architect the low level storage system to something that isn't dependent on vacuuming, called zheap. Unfortunately it seems to have stalled and nobody seems to be working on it anymore? I keep scanning the
408.
by jabl 2y ago
Reflecting the interwar German society more broadly; agricultural mechanization was decades behind the US and UK. The industrial and economic "miracle" of the pre war Nazi regime wasn't spent on tractors either, but on weapon
409.
by jabl 2y ago
Buy HW that can be flashed with coreboot? And while it won't (completely) remove SMM, https://github.com/corna/me_cleaner might get rid of some stuff. I think that's more about getting rid of spyware and ring
410.
by jabl 2y ago
It's going to be slower, as in lower throughput, due to more locking and scheduling overhead in the kernel. Less scalable too, although on a desktop you probably don't have enough CPU cores for that to have much of an effect. I pr
411.
by jabl 2y ago
One of the features of PREEMPT_RT is that it converts interrupt handlers to running in their own threads (with some exceptions, I believe), instead of being tacked on top of whatever thread context was active at the time like with the softi
412.
by jabl 2y ago
> For context, the contemporary commercial merchant fleet is about 80,000 ships Yes, though the contemporary fleet moves a lot more cargo than the WWII era fleet, as the ships are a lot bigger, somewhat faster, and thanks to containers a
413.
by jabl 2y ago
> At some point there will probably a startup using this data to salvage all these ships. FFS, yes this is HN and all, but why does everything have to be a "startup"? FWIW, there's lots of under-the-radar (apparently mostl
414.
by jabl 2y ago
When you turn iron ore into steel with blast furnaces and steel making (e.g. basic oxygen process) you blast it with atmospheric air (or oxygen made from atmospheric air), and tiny amounts of impurities in the air (such as fallout from atmo
415.
by jabl 2y ago
> Some steel plants already use arc furnaces or induction heating to melt the steel. Electric arc furnaces are used for around 30% of global steel production https://en.wikipedia.org/wiki/Steelmaking#/media&#x2F
416.
by jabl 2y ago
It's not, really. It's been a while since I've checked pricing so my data might be old, but an IB switch is in the same ballpark as an ethernet switch with the same port speed. Same for HCA's. There's no analogue in
417.
by jabl 2y ago
I know little of dotnet beyond trying various semirandom things to make some .net apps work on linux. With that out of the way, my understanding is that - Originally there was .Net Framework, by microsoft, for windows only. Versions 1.0 -&g
418.
by jabl 2y ago
In France and Belgium, they dig up something like 900 tons on WWI munitions per year. At this pace they estimate that they're done in another 300-700 years. And the decomposing shells leach nasty stuff like mercury and arsenic, poisoni
419.
by jabl 2y ago
> Or fire a 5 inch gun, you know, if that's more your speed. Depends on what the target is.
420.
by jabl 2y ago
This article explains the problems with fork pretty well: https://www.microsoft.com/en-us/research/uploads/prod/2019/0...

More ›