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Cake day: June 11th, 2023

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  • Rivalarrival@lemmy.todaytoAI@lemmy.mlTeachers Are Not OK
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    23 hours ago

    A presentation component is the kind of class work I mentioned.

    When you hire someone to do a job for you, do you want someone who will bust their ass all day and turns in mediocre work? O

    Or do you want someone who does the job quickly, efficiently, competently?

    When you’re working, do you want to bust your ass all day on something you are barely but technically qualified to perform? Or would you prefer to follow your passion?

    Heavily weighting effort for effort’s sake favors the talentless over the talented, and does neither any favors.



  • Rivalarrival@lemmy.todaytoAI@lemmy.mlTeachers Are Not OK
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    1 day ago

    Seems pretty simple to me: No graded homework. Grade based on test scores, quizzes, and in-class work.

    If a student needs heavily weighted homework/essay grades to offset mediocre test scores, they are a mediocre student and deserve their mediocre score.

    Hard work is not a replacement for talent.




  • If she is still financially reliant on her parents, you should abide by her wishes on the subject. You should not consider it a reflection of her relationship with you. She is doing what she needs to do to survive and thrive.

    Eventually, she might choose to rely on you for financial support. But, you could be killed in a traffic accident, and she would still be dependent on their support. Even after you are supporting her financially, she still needs to do what she needs to maintain her relationship with them.

    You should not consider her relationship with her parents to be a reflection on your relationship until she is capable of supporting herself, independent of both you and them.

    Until then, she is being coerced, to some degree or another, and you should consider that coercion when evaluating her behavior.



  • Ah. I see. They are emitting a green light, so I know they’re braking, and it’s OK to cross.

    But, it turns out that they’re planning on turning into a driveway past the intersection, and not into the intersection I am crossing.

    That’s OK. I can check “impersonate a hood ornament” off my bucket list.


    We already have this problem with turn signals: there are circumstances where it would be confusing and dangerous to use them in the manner prescribed by law, and to avoid dangerous ambiguity, they should actually be used much later than the law specifies.



  • It’s not the voltage you need to focus on. It’s the current.

    Analog telephone wiring used 90v @20hz to ring the phones. Off-hook, they were at 9vdc, which rose to 48vdc on-hook. The insulation can handle potentials much higher than 5v.

    But, telephone wires are typically 26awg to 22awg, which are only rated to .361 to .92 amps for power transmission. Pull too much current, and you risk melting the insulation and starting a fire.

    Since DC power (watts) are volts times amps, to keep the amperage low, you will want to keep the voltage as high as the insulation will tolerate.

    Telephone wiring is very similar to (and may even be carried on) cat5/6 cabling. There are formal standards for using cat5/6 cabling for power transmission: Power-Over-Ethernet standards 802.3af, 802.3at and 802.3bt. These standards call for 44 to 60 volt power injectors, and up to 15.4 watts per wire pair. If I were going to jury rig household telephone wiring for power transmission, I would use those standards as a guide.

    You should use a current-limited power supply, to keep your current below 0.361A, or you risk melting the insulation and starting a fire.




  • The risk of a mishap is greatest on takeoff and landing. Inflight mishaps are extremely rare.

    A “flight” is one takeoff and one landing. The largest aircraft have the longest duration flights. They might be airborne 12+ hours at a time. They might fly fewer than 10 flights a week.

    Small commercial aircraft flying local and regional routes might be shorter than an hour. These aircraft might have 70 flights a week.

    A student pilot in the smallest, single-engine GA aircraft might spend all day shooting touch-and-goes to build time and experience. Each touch-and-go is a landing-and-takeoff. These aircraft might have 300 “flights” a week.

    Yes, the smallest aircraft are going to have the highest per-airframe mishap rate, simply because they experience the most risky phases of flights much more frequently than large aircraft.

    Per-flight, the risks aren’t significantly different.