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Joined 1 year ago
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Cake day: June 11th, 2023

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  • I don’t know why everybody focuses so much on the top of the wing. Relative to ambient air, the pressure above the wing is slightly reduced, but the pressure below the wing is massively increased. That massive increase is far more important than the slight reduction above.

    We know this, because simple, flat airfoils are capable of flight. Think: paper airplanes, simple balsa models, etc.

    The shape of the airfoil is not actually very important for lift. You can make a brick produce plenty enough lift to maintain its altitude, if you can provide sufficient thrust and control it’s attitude.

    The specific shape of the airfoil is primarily important for minimizing drag across a variety of speeds and angles of attack at various loadings. This is where the top surface of the wing becomes important. By maintaining the flow over the wing, drag is reduced, and controllability is maintained.















  • the hospital did a CAT scan of little Nikki and found a swollen, bleeding brain believed at the time to be a classic sign of shaken baby syndrome.

    There are, indeed, conditions that will cause a brain to bleed inside the skull. Those conditions don’t explain all the head injuries outside the skull: the hematomas and hemmorhaging between the skin and the skull.

    If you want to argue against the death penalty, go ahead. I lean against it; you don’t have to convince me.

    But we do a disservice to every actual innocent convict when we pretend a guilty man is innocent just to avoid a sentence we abhor.

    If you want to explain the myriad serious head injuries in some way that absolves him of responsibility, I’m listening.



  • From wiki:

    According to prosecutors, physicians reported that Nikki suffered and ultimately died of “massive head trauma”. Prosecutors argued that in the emergency room, Nikki was found to have “[a] bruise on the back of her shoulder, a scraped elbow, a bruise over her right eyebrow, bruises on her chin, a bruise on her left cheek, an abrasion next to her left eye, multiple bruises on the back of her head, a torn frenulum in her mouth, bruising on the inner surface of the lower lip, subscapular and subgaleal hemorrhaging between her skin and her skull, subarachnoid bleeding, subdural hematoma, both pre-retinal and retinal hemorrhages and brain edema.”[12] Additionally, four separate doctors testified Nikki had “multiple blows to different points on the head,” which could not have been caused by falling off a bed.[13] At trial, Roberson’s defense expert admitted that Roberson “lost it” and shook Nikki because he could not stop her from crying.[13]


  • even then you don’t need this recurring manual registration mess.

    There is no recurring manual registration. You only need to register once in your lifetime.

    If you move, you have to update your ID within 60 days, and every time you update your ID, they update your voter registration automatically. (unless you decline).

    That has been federal law since 1993, and is pretty much equivalent to European standards.

    You really have to go out of your way to not be registered to vote.


  • Just for another angle on the problem: baseload generation (nuclear) is most efficient at its highest possible output, but it has to maintain that output 24/7. It can’t ramp up and down fast enough to match the demand curve, and it can’t be ramped up above the minimum overnight demand.

    To increase its efficiency, utilities push large scale consumers like steel mills and aluminum smelters to overnight shifts. This artificially increases the overnight demand, allowing the baseload generators to ramp up their relatively efficient production. This reduces the need for less-efficient peaker plants during the day.

    That overnight demand can’t be met with solar, and wind generation tends to fall overnight as well.

    What nuclear can do is help level out seasonal variation, between the short days of winter and long days of summer. If you want to contemplate a truly pie-in-the-sky scenario, there are provisions for tying large ships, (like aircraft carriers and hospital ships) to shore power, and backfeeding the local grid to support disaster relief efforts.

    Imagine a fleet of nuclear generation ships, sailing to northern-hemisphere ports from November to April, and to southern-hemisphere ports from May to October.

    Pumped storage is also essential, but extraordinarily limited. We can probably run essential overnight loads on pumped storage, but it does not make sense to keep an overnight load on pumped-storage that can be shifted to solar/wind directly.

    We need to take a look at demand shaping rather than supply shaping. We need to shift load to times we can produce, rather than shift production to times of demand.


  • Rivalarrival@lemmy.todaytoMildly Infuriating@lemmy.worldGoddammit Texas!
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    25 days ago

    But it’s very difficult for a lot of people.

    It is, indeed, but the proper solution here is to lift them up to the bar, not lower the bar down to them.

    Lack of ID prevents you from getting and keeping a job, attending school, accessing the banking system, getting a PO box, getting licenses. Being unable to vote is the least of your problems.

    The proper solution is not to figure out how to make voting accessible to those without an ID. The proper solution is to get them an ID.