hannob

77 ms·

901.
by hannob 6y ago
This looks like a small study that only measured a surrogate outcome. Given the huge problems that persist in psychology research the relevance is pretty small.
902.
by hannob 6y ago
You're complaining about the low efficiency of H2, and then you end up proposing methane as an alternative? To create methane from electricity you need hydrogen to begin with. To create methane from that you need CO2, which you can get
903.
by hannob 6y ago
I heard one number in the discussion in Germany (where in some areas the wolves discussion runs wild) which I found interesting: The number of people killed by wolves in Germany in recent years is zero, the number of people killed by dogs i
904.
by hannob 6y ago
Please note these trains have a dirty secret: They run with hydrogen made from fossil gas.
905.
by hannob 6y ago
> if hydrogen trains can approach the operational cost of electric trains That's exceptionally unlikely. You go from "use electricity to run a train" to "use electricity to run an electrolyseur, fill hydrogen into hyd
906.
by hannob 6y ago
I'm very skeptical whether it makes any sense to use hydrogen on a train. We know since many decades how to run trains on electricity. It's an established technology. It seems hydrogen trains are a cheap excuse for places where in
907.
by hannob 6y ago
And noteworthy in regards to this thread: Not with a D-Wave computer.
908.
by hannob 6y ago
> With regards to the D-Wave systems in particular, are these actually faster than solving the problems with a classical approach? Obviously the answer to that is "No". Google just did a "Quantum supremacy" experiment
909.
by hannob 6y ago
No, not surprised, well aware of that. We should really get started developing alternatives. Cement is a tough one, probably the toughest industry sector at all. For steel the swedish companies SSAB+LKAB have a very ambitious plan using hyd
910.
by hannob 6y ago
Citing the article: "In the near term – a timescale that matters enormously to climate change – the only way to decarbonise aviation is to fly less. As an option, that seemed plumb absurd until this year, when we were forced to learn h
911.
by hannob 6y ago
I'd say 2% is a whole lot for a single industry, but there's a few more things that make this concerning. It's an industry that has been growing a lot. It is an industry that is very unevenly used by the world population ( ma
912.
by hannob 6y ago
Observation: Often articles about the airline industry and new aviation tech manage to completely miss the giant elephant in the room - which is the incompatibility of this industry in its current form with a world in a climate crisis. This
913.
by hannob 6y ago
> Olkiluoto 3 is a new design though. Making a second exact same one again will be much faster and cheaper as you have now worked out most of the issues. The second exact same one is actually Flamanville 3, the other one with the massive
914.
by hannob 6y ago
> Nuclear is only so relatively expensive because it’s the only fuel source that’s forced to pay up for all the externalities up front Can you state in which country nuclear has to pay all the externalities up front? And if that country
915.
by hannob 6y ago
If you don't heat or cool them yes, it reduces CO2 emissions. No, it's not preferrable.
916.
by hannob 6y ago
I find this announcement surprisingly scarce on details. It's basically a press release and some nice pictures. It lacks even basic information like the amount of hydrogen they'll need for a given flight.
917.
by hannob 6y ago
> If Germany hadn’t shutdown 11 nuclear power plants since 2011, emissions in the electricity sector would now be 50% to 70% lower. That's the thing where you're very likely wrong, as you ignore the political situation where al
918.
by hannob 6y ago
2035 isn't radical at all. Plenty of other countries already discuss bans for 2030.
919.
by hannob 6y ago
> So why not just do full manufacture of regular fuel? Always fascinating when people use "just" in sentences where they propose something that hasn't been done before (at least not at any scale that would matter) and that
920.
by hannob 6y ago
Admittedly I only played one game for a while on a borrowed 3DS (Super Mario 3D Land), but I quickly thought the best thing about the 3D effect is that you can turn it off.
921.
by hannob 6y ago
Yeah, it's a bit of a pet peeve of mine to complain that so many people who start "easy crypto explanations" basically explain things that are outdated or sometimes simply wrong. This is not how HTTPS works, it's how HTT
922.
by hannob 6y ago
This article misses the elephant in the room: The emissions created by the use of a companies product. Google, like all large cloud providers, has lately heavily invested in collaborations with the oil industry: https://gizmodo.c
923.
by hannob 6y ago
It's complicated. For one, yeah, those offsetting companies calculate very generously. E.g. I once looked a bit into this and they make arguments like "we don't consider construction of the airport, because it's already
924.
by hannob 6y ago
I don't buy that. Glibc and GCC introduce incompatible changes all the time.
925.
by hannob 6y ago
If anything probably the opposite. You're much more likely to get medical treatment if you have some "undefined respiratory symptoms" right now, and doctors will usually try to find out if you have covid or something else.
926.
by hannob 6y ago
The researcher's site is probably more informative: https://raccoon-attack.com/ tl;dr cryptographically it's a neat attack, but practical risk is very small.
927.
by hannob 6y ago
This actually exists using water. There's a pilot installation in southern Germany which has been running for a few years: https://www.naturspeicher.de/de/pilotprojekt/pilotprojekt.ph...
928.
by hannob 6y ago
This isn't really the same use case. A basic thing to understand about electricity storage is that there are very different needs for different kinds of storage. Flywheels from what I understand are for very shortterm storage needs, i.
929.
by hannob 6y ago
That's a reasonable hypothesis. Another one is that it's a reverse causality: Several diseases may inhibit Vitamin D uptake. And don't forget: It can be multiple causes combined. (I.e. it may be a mix of a confounder like bei
930.
by hannob 6y ago
Realistically carbon removal will only happen after we removed most carbon emission sources. Carbon removal will likely be more expensive than reducing emissions for decades to come. This is a future technology for the time, for the "f

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