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Cake day: August 18th, 2024

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  • I wrote a school report about iter back in middle school or high school when it was still in the design process and still occasionally check their job listings because I would love to work there and on fusion but we still don’t know if it will ever work like we hit the scientific breakeven with inertial confinement but the scaling on that is terrible and I don’t believe we hit even the scientific breakeven with magnetic confinement

    Then we still need to harness the energy from that turn it into work, turn that into electricity and distribute it with enough excess to pay for the whole system which is still a lot of hurdles we need to climb





  • I could be mistaken but wasn’t the issue that when the rods were fully withdrawn the graphite was also partially withdrawn so when they scrammed the first thing that happened was an insertion of positive reactivity from the graphite which was enough positive reactivity to burn up all the xenon which then caused the reactor to go prompt critical?

    Like the presence of the graphite wasn’t that bad but it combined with a lack of interlocks and improperly trained operators was the big problem and of course trying to start up at the peak of a xenon transient is never ideal


  • If it’s directly touching the walls it will decrease the efficiency of the freezer since initially the rate of resistance to heat transfer could have been represented by L/KA+ 1/hA with L being thickness of the wall of the freezer K being the thermal conductivity of the freezer wall and A being the surface area and h being the convective heat transfer of mostly stagnant air. In that case the effect of conduction through the freezer wall is a worse insulator than the transfer of heat through the air but by touching the item to the freezer wall you are trading that 1/ha for another L/KA with a negligible L so the resistance to heat transfer is also negligible.

    That’s a lot of terms but you have experienced this before if you have a pan on the stove and you hold your hand above the pan it will feel significantly less hot then if you place your hand directly on the pan. If you have someone put a fan over the pan so there is a flow of air and then put your hand in the same place it will feel warmer since now you have air movement which increases your h term but it will still be significantly less hot then if you touch the pan.

    I still might not be explaining this well but the math for it comes from the resistive model of heat transfer that while it has a lot of reciprocals I still find it to be the easiest to get an intuitive idea of what’s happening

    In summary though from everything.

    Empty freezer bad because the air inside leaves whenever you open it.

    Very full freezer bad because it blocks flow of coolant causing hot spots and cold spots so needs to be kept much colder to make sure the hot spots don’t get too hot which causes more losses

    Touching freezer wall bad because accelerates warming

    Mostly full freezer good because the items work as a heat sink helping to keep a regulated temperature while allowing proper flow of coolant





  • It wasn’t a single issue vote or Congress would have just approved it.

    It also didn’t break U.S. laws, it’s the bullshit emergency bypass that Trump keeps doing for everything

    And then you say that Trump won’t do it unless Israel pays him but the way he is behaving makes it seem like they are considering he is taking funding from school over not crushing pro Palestine protests and is calling it anti semitism

    Biden fucking sucked for the people of Gaza but it’s only gotten worse since Trump was made president





  • The “danger” comes from reliance and a misunderstanding of capabilities. It can save time and be very helpful if you use it to make a framework and then you fill in/ modify the pertinent details. If you just ask it to make a PowerPoint presentation for you about the metabolic engineering implications of agrobacterium and try and present without any proofreading you will end up spouting garbage.

    So if you use it as a tool and acknowledge its limitations it’s helpful, but it is dangerous to pretend it has some semblance of real intelligence


  • If you want useful public transit then it needs to connect population centers where people are. People are lazy and don’t want to walk more than 1/2 mile to a bus stop so if you have a population density of 1000/ sq mi that means any one bus stop is only going to be able to provide adequate coverage to 250 people. With so few people per stop it needs to make a lot of stops to be useful which then makes it slow which further lowers use. At that density it also doesn’t make logical sense to have designated bus lanes so they are stuck going slow in traffic as well. So now you have an expensive system that nobody uses because it sucks

    If you have higher density then you can justify more lines which makes them actually useful and can add things like light rails which really make a difference

    Bike transit is usually easier in those lower density areas but due to the low density getting between places is usually a bit further away so there are usually higher speed limit roads that aren’t as good for cyclists so more expensive barriers need to be constructed or they have to follow less direct paths which causes cycling to be slow