jabl

58 ms·

961.
by jabl 4y ago
> When I was a kid, I remember my dad throwing out teflon pans once they'd chipped. He believed it caused cancer if the coating got into your food. AFAIU that hasn't been proven. Teflon cookware is dangerous mostly due to the p
962.
by jabl 4y ago
> It is my understanding that currently you're allowed to manufacture a completely new chemical and put it into your product with essentially no testing of the long term effect of that compound. Pretty much. There's also a fair
963.
by jabl 4y ago
Many paper/cardboard food containers (like coffee cups) contain a thin plastic liner to water/grease proof them. There's a Finnish company that has developed a plastic-free coating: https://kotkamills.com/prod
964.
by jabl 4y ago
It's producing $$$ for the 'old-school' space companies, which seems to be the whole idea. The more elaborate they can make it and the longer they can drag it out and suck up taxpayer money the better.
965.
by jabl 4y ago
Currently some of the most widely used diesel aviation engines, the Thielert/Technify/Continental 1.7/2.0 liter one, as well as the Austro E4, are both based on a Mercedes car engine.
966.
by jabl 4y ago
The whole point of this decades-long unleaded AVGAS saga is to develop a fuel that is a drop-in replacement for the current leaded AVGAS. A fuel that needs to be stored either in a pressure tank or chilled does not fulfill that requirement.
967.
by jabl 4y ago
But the specialty mechanic has an incentive to lie, if he thinks you're going to bring the car to him for service. ;)
968.
by jabl 4y ago
> Technology has moved on. Well, how far do you want to take that argument? One could argue the last time high performance piston engine engineering actually mattered was in the aero engines of the 1940'ies. Then you had the might o
969.
by jabl 4y ago
Been a while since I was actively involved in GCC development, but back then most issues like this AFAIR were due to math functions and not basic arithmetic. GCC doesn't control the target libm, and correctly rounded libm's are ra
970.
by jabl 4y ago
One usecase, for instance, is if you're writing a compiler and you want to constant propagate floating point operations, and the compile host doesn't necessarily support the same FP formats the target hardware does. But you still
971.
by jabl 4y ago
> we’ve been lucky to have component compatibility across manufacturers as an option for decades. Aha-ha-haa! Tell me again how many different bottom bracket "standards" do we have, and why? (Just to pick an example)
972.
by jabl 4y ago
> I don't remember the exact specifics, but Fortran disallows some of the constructs that C/C++ struggle with aliasing on, so Fortran can often be (safely) optimized to much higher-performance code because of this limitation&#x
973.
by jabl 4y ago
Server platforms tend to have the serial wired to the BMC and going out over the IPMI serial-over-lan on ethernet. But from the host OS it looks like a regular 16550A.
974.
by jabl 4y ago
> My algorithm is single threaded :-) And why should your algorithm be the benchmark for supercomputer performance, rather than something that is at least somewhat related [1] to the workloads those machines run? [1] We can of course arg
975.
by jabl 4y ago
It's a very fast, very low latency network fabric. But it's not coherent in the sense of cache coherent multiprocessors, and it doesn't offer shared memory style programming where you'd just load/store to addresses
976.
by jabl 4y ago
> I want to be pedantic and point out that water as a substance is not the same thing as water as an ingredient in another substance. It is not water, it is something else which contains water. It's possible to take that pedantry a
977.
by jabl 4y ago
The post-war period (la trente glorieuses, if you pardon my horribly mangled French) was a time of rapidly improving living standards, both due to the end of wartime rationing and rapid economic growth, and general societal optimism. So the
978.
by jabl 4y ago
Er, glycol isn't a flourocarbon.
979.
by jabl 4y ago
It's water. Or, if you want to be pedantic, a mixture of water and glycol as a fungicide and antibacterial agent.
980.
by jabl 4y ago
Transporting X Joules of heat around by pumping water is definitely a lot more efficient than transporting the same heat energy around by blowing hot air. So pumping losses are much smaller.
981.
by jabl 4y ago
Boat engines with direct seawater cooling are definitely a thing. Usually only on the cheapest and nastiest engines, better ones definitely have a separate heat exchanger.
982.
by jabl 4y ago
Exactly this. Makes no sense for a single desktop computer, but when you have a huge room filled with servers, it's a lot more efficient to pump cooling water around than blowing a huge amount of air around. Also air cooling a rack ful
983.
by jabl 4y ago
Yes, I'm personally not very happy about another large scale usage of flourocarbons. Seems the history of these compounds is basically "look, we found this new compound with some very exciting and useful properties" followed
984.
by jabl 4y ago
Wasn't there some upcoming PSU spec that dropped the 5 and 3.3V rails leaving only 12V? What happened to that? Edit: Yes, the "ATX12VO" spec.
985.
by jabl 4y ago
Wrt #2, there is the additional argument that when selecting compiler optimizations for a -mtune=generic (or equivalent) target, it makes sense to be a bit "forward leaning", as it'll be a while before your work ends up in a
986.
by jabl 4y ago
Is it the right default? If the vast majority of branches are predictable, then without PGO a branch would be the right choice, no? If they're gonna make this behavior the default, I presume they have lots of benchmarks showing it&#x27
987.
by jabl 4y ago
Ideally the idea of representative government is that the legislators would have the time to study the issues before voting on them. Direct democracy is problematic because most people can't be bothered to read up on the issues, or eve
988.
by jabl 4y ago
Well, the two-party system is a result of having single-winner districts. Countries with multi-winner districts tend to be the ones were many parties are viable.
989.
by jabl 4y ago
I'm not sure the forced collectivization failed in the metrics that mattered to Stalin. The collectivization did really massively increase agricultural productivity enabling huge numbers of workers to be moved into factory work in the
990.
by jabl 4y ago
I saw some documentary on the TV about the common food people ate in various decades in the UK, and there they said that some time after WWII when rationing was ended people were so dead tired of their victory gardens that most of them were

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