jabl

41 ms·

661.
by jabl 4y ago
The recent-ish 10base-t1 uses something called PLCA instead of CSMA/CD which doesn't require time synchronization, and gives each node in a subnet a dedicated transmission slot.
662.
by jabl 4y ago
Sounds similar to Infiniband where each subnet has a subnet manager which calculates routing tables for the entire subnet, and assigns 16-bit local identifiers (LID) so you stations don't need to use the full 16 byte GUID's. Also
663.
by jabl 4y ago
I remember when I bought my first fast ethernet card, there was some Linux HOWTO that discussed various ethernet NIC's, and crucially, their Linux drivers in excruciating detail. And the takeaway was that if you had a choice, pick eith
664.
by jabl 4y ago
Propane is a very good refrigerant for many common uses like AC, heat pumps, or refrigerators, yes. But yes, AFAIU initially CFC's were hailed as a significant safety advancement and quickly replaced older refrigerants that were poison
665.
by jabl 4y ago
It's hard to have any conclusive number on this, it's not only about inflation etc. but also the cost of alternative ways of achieving the required octane (e.g. increasing production of reformate or alkylate, or the refinery buyin
666.
by jabl 4y ago
> Most aviation would never have happened if this guy hadn't invented leaded gasoline. Duh, of course it would. Aviation gasoline would have used other methods of increasing octane, and/or then we'd have made do with sligh
667.
by jabl 4y ago
> the military, which wants the weapons to detonate on time every time Well, the military sure is also concerned about avoiding non-intentional detonations due to accidents or by being hit by enemy fire. E.g. the IMX series of explosives
668.
by jabl 4y ago
I recently read about the Oppau disaster ( https://en.wikipedia.org/wiki/Oppau_explosion ), where the workers were getting bored with using pickaxes to break up a huge pile of compressed ammonium sulfate and ammonium ni
669.
by jabl 4y ago
Same. Although I had long ago decided that an academic career wasn't for me, I was always thinking that after I finish my PhD (computational condensed matter physics), I would somewhat keep up with my field just for fun. But between ki
670.
by jabl 4y ago
See also an interesting video series of a crazy guy that put a turbine engine on a small STOL plane: https://www.youtube.com/playlist?list=PL9OFkVHYEhoEfWmN0lQRZ...
671.
by jabl 4y ago
I didn't look at the links, but from the ingredients list you posted, yes those are pure hydrocarbons, nothing chlorinated.
672.
by jabl 4y ago
Acetone bought from your local shop that sells car spare parts, tools, and whatnot is likely several orders of magnitude cheaper than the same acetone bought from the cosmetics department. I keep offering my bottle of acetone to my SO but s
673.
by jabl 4y ago
It's very important that memcpy() copies from higher addresses to lower, as that cancels the harmonic caused by SIMD instructions copying the other way. The opposite if you happen to use a big endian system.
674.
by jabl 4y ago
We had Fujitsu-Siemens PC's at a previous job. I think at some point they dropped the "-Siemens" part of the name so I guess Fujitsu bought out the shares and went all alone.
675.
by jabl 4y ago
IIRC you can (or at least could 10+ years ago) start it without the GUI with "matlab -nojvm".
676.
by jabl 4y ago
Sure, it's corrupt shit, no argument there. And really, what's being offered for the other 70% if not pain and suffering, for the make believe goal of glory of the tsar? Sure, they might be treated a lot better than the non ethnic
677.
by jabl 4y ago
> "The Perestroika Deception"[1] in which he says that Perestroika is a strategic retreat because the Soviets know they are too far behind technologically to have any hope of defeating the west. They will however use that retre
678.
by jabl 4y ago
Sure there is. I mean, there's no ideology that promises a better future for the common man, like communism, but ideology there is; Imperialism, glory of the motherland, a peculiarly Russian variant of "Manifest destiny", pow
679.
by jabl 4y ago
No, I don't wanna turn coal into gasoline; we should try to reduce the net addition of CO2 to the atmosphere, not increase it further. AFAIU the Bergius process can use any source of carbon, doesn't need to be coal. The reason Naz
680.
by jabl 4y ago
But we don't need a one-size-fits-all solution. If the 80%(?) (and steadily but surely rising) part of the population that lives in urban areas in developed nations switch to public transportation, cargo bikes, the occasional car-for-h
681.
by jabl 4y ago
TBH, probably a lot of the non-expert literature seems to use FT fuels as a synonym for any kind of synthetically produced liquid hydrocarbons.
682.
by jabl 4y ago
Was going to say this. Sodium batteries are looking extremely interesting.
683.
by jabl 4y ago
A much smaller market would have to pay for the fixed costs of the oil industry? Gas stations close because a few Porsches, Ferraris and classic cars isn't enough to keep them afloat? Then OTOH, due to refineries working the way they d
684.
by jabl 4y ago
If we're talking about fuel for gasoline engines, probably the Bergius process would be more suitable, as that produces fairly high octane gasoline. It was extensively used by Nazi Germany for producing aviation gasoline, FWIW. Fischer
685.
by jabl 4y ago
Too early to tell, but my cynical mind expects the 30% requirement will be fulfilled by choosing parcels of ocean smack in the middle of nowhere with the least economical and thus ecological value.
686.
by jabl 4y ago
Not sure that's the main culprit in this particular case, but yes, bottom trawling is incredibly destructive and should be banned.
687.
by jabl 4y ago
I guess, hypothetically, you could have giant D-D power plants producing He3 as a byproduct, which can then be used in smaller more portable applications like (space)ships.
688.
by jabl 4y ago
From what I understand, at least here in Europe CO2 has been common in recent supermarket and similar installations.
689.
by jabl 4y ago
Yes, I've read about Heinrich Hora's approach to fusion. I'm not enough of an expert on this to say whether it's bogus or not. Guess the proof is in the pudding if they build a machine to demonstrate that these theoretic
690.
by jabl 4y ago
That's interesting, a had an AC unit installed 2 years ago (in Europe), and then many units were marketed as using the new R32 instead of the traditional R410A. Now that I look at the website of the company that did the installation, i

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