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Joined 1 year ago
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Cake day: June 30th, 2023

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  • I think there’s a lot of fluff for sure. I do think there is some real technique to it, though.

    Pouring so that you keep a higher volume of water in the pourover will help to keep the temperature stable, which should help keep extraction up. The two extremes here would be if you dripped water through in like 20 additions, letting the bed settle each time vs. doing it all in one addition. The average temperature throughout would be higher in the latter case.

    Bloom should also have an effect for freshly roasted coffee. If you dump a bunch of hot water on really fresh coffee, a decent amount of the grounds will just float on top of bubbles, insulated away from the actual water. It matters less and less as coffee ages/off gasses.

    Agitation should also have an effect. Things dissolve better when agitated; that much is obvious. The only additional thing to consider is that no coffee grinder creates perfectly uniform grounds. One thing that any beer brewer can tell you is that the “filter” is not what actually filters a wort from the spent grains; the spent grains themselves form a filter to get rid of any fine particles. Similarly in coffee, a lot of the fines will actually get caught up on the larger particles, provided the larger particles are allowed to settle. If you keep the grounds agitated the whole time, the fines will get sucked into the filter paper itself. Some will probably make it through into the cup, which could affect taste and texture, while much will clog up the filter, slowing the whole brew down.

    It ends up depending on how good your grinder is (and if your beans are especially prone to making fines), and what type of filter you use. If you theoretically had a perfect grinder and beans, maybe you’d want to keep the grounds agitated the whole time, but if you have a crappy grinder, maybe you want to have no agitation at all.

    Personally, I have an okay grinder, and i always use fresh beans, so I try to bloom my grounds with maybe 20% of the water, and agitate as much as possible. Then I add basically as much water as my pourover will hold at once, and I’ll top it off gently as soon as room opens up.




  • There’s basically a tree of operations that have been applied to a model. At any point, you can go back and edit what you’ve done at a previous step. For example, if you padded a feature out 10 mm, then added more stuff onto that feature, you could still go back and change that padding operation to 15 mm.

    I’m still super new to freecad, and I haven’t done anything too complex in it yet, but my understanding is that some types of those changes can result in the topological naming problem. The way I understand it, when you make a shape, the software numbers all of the segments, vertices, and faces. If later changes are applied to those numbered faces, etc, and you go back and redo the operation that made those faces, etc, in a different order, the numbering will be different, and it will break your model.

    There is a fork of freecad that fixes that whole issue, but the fix hasn’t been implemented yet in the main fork cause it’s pretty foundational to the working of freecad, so there’s a lot of things that can break






  • Thanks for looking through all of this. If I’m understanding right, it seems like Congress is asking NHTSA to do a task that is probably not possible, but they are required to at least go through the motions to try?

    It seems like they just told nhtsa to use technology to fix drunk driving so they can wash their hands of the situation and claim they tried to do something, but nhtsa couldn’t figure it out. Why didn’t they tell the NIH to eliminate the cancer while they were at it.

    I do believe the technology to detect BAC is too erroneous to inflict on innocent drivers, and technology that could detect impairment through driving characteristics, while possible for individual drivers could never work on a population level. There’s going to be a lot of overlap between impaired drivers and just naturally bad drivers.





  • Im not 100% sure how the batteries are constructed from all of the cells (and I know it depends on the model), but the re-using process can work a lot better than just pulling out the battery and popping it down. EV batteries are in the range of hundreds of volts, but the cells themselves are about 4 volts. It’s my understanding that the battery as a whole doesn’t uniformly degrade, but you might have individual cells that degrade. If 1 cell in a chain of 10 goes bad, that chain can be made off limits to the battery, so you still technically have 9/10 cells that work fine.

    The way a lot of people reuse/recycle/refurb (not sure what the right terminology is in this instance) EV batteries is to test each of the cells themselves, and get rid of the duds, and keep the decent cells. Tesla, for example, all used to use 18650 cells (and I think some models still do), which is the same exact cell that’s in decent name-brand cordless power tools.

    When you aren’t required to keep weight, space, and extra circuitry to a minimum, you can really design a system that squeezes every last drop of usefulness out of those cells before they need to be melted down and remade.