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Cake day: June 16th, 2023

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  • They’re little sea puppies that are perfectly happy to cruise around while you swim with them. At least that’s the grey nurse sharks we get in aus. The ones you’re describing sound more like wobbegongs or similar. The grey nurses need to be in highly oxygenated water.

    Grey nurses also used to have a rep as “man eaters” but that was just because of how they looked,not any actual attacks






  • ephemeral_gibbon@aussie.zonetoLefty Memes@lemmy.dbzer0.comReminder...
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    6 months ago

    But ranked choice is easy to implement and in practice if everyone would put a candidate second they aren’t likely to be knocked out in the first round. There are very limited practical examples where it doesn’t provide the optimal outcome.

    It also seems to have some level of support and momentum in the US and it seems to me like it’d be better not to get caught in the weeds fighting over which new voting system should be implemented there.


  • I mean, that seems like a really sceptical way to live. Often things get shilled because people are just happy with the service and think the business is doing things well. I am a kagi user and have brought it up to some others, including outside of lemmy, because I find it produces better search results than ddg etc. And it’s a definite step up from google in privacy











  • Because we could use the money spent on nuclear to build more renewables and supporting infra (storage and transmission) than if we also built nuclear. The renewables will snap be finished and replacing the fossil fuels a lot sooner than the 10-15 years for a nuclear reactor.

    If you look up studies into it you need a lot less storage than you’d expect to run a fully renewable grid, as the scale of the grid stabilises it to weather fluctuations. Winter also is a problem that can be overcome. That gencost report is a decent starting point, there are plenty of other studies into it though. The low cost of storage is also especially true if you’re looking at the first 99% of the grid.

    Maybe those studies are wrong and nuclear would be economic for that last 1%. However, if we can get to 99% years earlier by just building renewables then discover that it’s harder than expected to get to 100 (somewhat unlikely, especially as more storage tech is developed), we can build nuclear then. The net carbon from getting off the majority of fossil fuels years earlier will probably make it the better decision anyway.

    Also just noting that my views are based on what I’ve read about Australia so you should also find peoperly researched cost analysis for your country. Also for renewables to work well in smaller countries they’ll need to develop more interconnects their neighbours etc.


  • Hydrogen works well with a renewable grids because you can take advantage of the times there is excess energy production so that power doesn’t just go to waste.

    We do need to be careful because hydrogen is often sold as a pipe dream by gas companies to convince us to use gas (e.g. “this new gas turbine power plant can be converted to hydrogen”, even though that’d be a workload less efficient than fuel cells).

    As for its use in transport, it looks like battery electric vehicles have won that battle for personal vehicles. Both have their advantages but in practice there are few enough fuel stations for hydrogen and enough chargers that that’s not going to flip.

    However, batteries are entirely unsuitable to long distance, high load transport like trucks. Ideally they’d be replaced by rail, but that’s not happening anytime soon in many places so hydrogen likely will be the solution there.



  • The cost per MWh produced over a year, with grid + storage costs, is the number that matters. Wind and solar combined are much cheaper than nuclear there. For a source look that the most recent csiro gencost report. It’s produced by the Australian national science body and basically says that in the best case if smrs reach large scale adoption and operate at a very high capacity factor… They’re still way too expensive for the power they produce when compared to wind and solar with transmission and storage.

    To get off fossil fuels faster it needs to be economic, and nuclear isn’t economic. Renewables are