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Joined 1 year ago
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Cake day: July 20th, 2023

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  • Oh for sure. I do my best to avoid Amazon because most listings are full of made up lies. I know marketing is full of half truths and exaggerations, but I despise shopping at places that try so hard to deceive me.

    I just brought up Amazon since Amazon and monoprice are the most common options I see mentioned when people ask for alternatives to the overpriced options at best buy or whatever.

    Industrial suppliers can be more expensive, but the time and aggravation saved by shopping by specifications you can trust is frequently worth a modest price premium. I’ve switched to Digikey and McMaster for a number of personal purchases after realizing how much of a mental toll deceptive marketplaces carry.



  • This was pretty close to being true for 1080p and lower resolutions. If you get a 4k 120hz HDR display then bandwidth and signal integrity start becoming very important. The article you linked is rather old and really only considers media up to 4k 30fps. Cable quality especially matters at lengths above 4 ft for uhd and higher.

    There’s a lot of snake oil so you can’t just trust marketing claims. I’ve had terrible luck with cables that claim to support high resolutions from amazon and even monoprice. I’ve resorted to buying cables from actual electronics suppliers like digikey since their speed ratings should be accurate.





  • The fuel itself won’t stay radioactive as you point out. There is however neutron radiation produced while the reactor is running. This necessitates shielding for components and personnel.

    Additionally there’s a phenomenon called neutron activation, where a non-radioactive substance absorbs neutrons and becomes a slighter heavier isotope that is radioactive. For something like a research vessel with relatively little operation time and low fluxes, this isn’t a major concern. For power generating reactors with high flux over long periods of time, this will make some reactor components radioactive. That means servicing and decommissioning fusion reactors will still require protocols to monitor and control contamination.

    https://en.wikipedia.org/wiki/Neutron_activation

    Since there’s no risk of meltdown, none of this poses a risk to the general public. So fusion is indeed much safer than fission, but you can’t just say there’s 100% no radiation. That is erroneous.

    An x-ray machine doesn’t stay radioactive when not in use, but it still produces ionizing radiation when it’s on. Fusion power is similar. The radiation produced mostly goes away instantly, but is definitely present during operation.

    https://www.iaea.org/newscenter/news/neutrons-blast-fusion-materials-in-new-iaea-project


  • Deuterium tritium fusion releases helium-4 and a fast neutron. So most fusion schemes will involve producing radiation. However, the fuel can’t keep reacting without carefully controlled conditions so there is no meltdown risk or runaway reaction scenario. Vessel components may be activated by neutron bombardment and will still require careful handling when servicing the reactor.

    There are aneutronic fusion reactions, but they require higher energies and face problems with sourcing the fuel. For example helion energy plans to use Helium-3 with deuterium. Although even their fuel cycle won’t be completely aneutronic.

    Fusion is far safer than fission, but let’s not spread misinformation.