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Joined 2 years ago
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Cake day: June 23rd, 2024

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  • Not all places have cold water during summer (did the greedy water company already run a heat exchange there?)

    This would work but don’t use a conventional central heating radiator system: moisture would condense on the radiators and pipes, potentially causing wet floors and walls, and eventually mold. A radiator that deals with moisture well is an indoor AC unit, plus it has a fan, thermostat and remote control, and presumably they’re cheap to get when the more complicated outdoor unit fails. Just pump water through the coolant pipes! The water mains pressure is probably enough. (Don’t get an overly smart one or it will complain about lack of communication with the outdoor unit. Or hack it if you’re good at that.)

    Alternatively, an air-to-water heat exchanger (heat pump whose condenser is submerged and evaporator is a conventional indoor AC unit) is way more practical. With cold water, it will use very little electricity and has all the convenience of AC. The output water can be used as preheated feed into your boiler.






  • I know what hertz is, I’m en electrotechnician. The display’s refresh rate is measured in hertz, and has to be at least 40 Hz or you suffer from headaches and some from photosensitive epilepsy. (edit: only applies if the screen goes black between refreshes, which I just learned OLED, unlike CRTs, doesn’t.) Ideally 100 Hz or more. But the image (frames per second) does not have to change that often. For example, movies are 24 fps but 35mm film projectors are 72 Hz: they flash each frame 3x before advancing (using a three-blade shutter) because 24 Hz is seizure-inducing but using a unique picture for each refresh (72 fps) is expensive. Similarly, your OLED TV is 144 Hz when gaming at 144 fps (if you can afford that), when watching a 60fps gaming video or 24fps movie: the screen controller works the same all the time but the picture it’s fed changes more or less frequently.

    If an OLED screen refreshed at 1 Hz, you’d see a line going down the display edit: I learned about TFT OLEDs which don’t do that. So it never goes below 60 Hz. However, the phone can reduce animation fps when the CPU can’t keep up or to save battery. 1 fps is extremely choppy though, I don’t know where OP got that. I did once use a phone capped to that framerate (via adbcontrol pre-Lollipop where the screenshot is transmitted over USB) and it was awfully non-responsive.



  • So do CDs. 💿 If you have a player with a see-through lid, you can see the disc rotate around 2.5 times slower on the last track of a near-74/80-minute disc as opposed to the first. This might not apply with modern (2000+) and/or portable ones with cache (ESP) − MP3 support is a good clue it has the advanced electronics for that. And yes, CDs’ track starts at the center to enable short-play, smaller disks of any diameter between 5 and 12 cm (although slot-loading players only have cutouts for the two standard sizes).

    Players regulate the motor speed based on the data clock (and burners too: there is a pre-recorded “timing” signal even on blank CD-Rs) so technically, a constant-angular-velocity CD could be pressed and played on most players, just with no real benefits. The extra linear velocity at the edge would require increased laser power (or less than 1x speed) when burning, and vinyl killers (in the unlikely case they ever make a CD one) won’t keep up.









  • PLEASE don’t criticize OP for asking what you might see as an insensitive question. I don’t think they have bad intentions and they should be commended for seeking explanations.


    I also used to be ignorant or skeptical about gender, back when I was a Christian. But I think you can figure it out like I did.

    Basically, trans rights mean that gender is no longer purely about biological sex (and now we know even biological sex isn’t binary, look up intersex people). And gender isn’t really scientific, it’s how a person feels and presents.

    If you spend time around queer people (online can be enough) and listen, you’ll develop an understanding of different perspectives on gender. These spaces are meant to be safe (that kind of warmth dragged me in) but therefore please refrain from confronting people there. You might have uncomfortable questions but that’s what [email protected] is for, as opposed to, say, [email protected].

    But yeah, to this day I find some queers’ attempts to make the world more inclusive rather unreasonable, like most neopronouns that have been attempted in the heavily-gendered Czech language.

    And there are people whose gender identity is so out of the ordinary you might never understand. It’s great that you ask questions, even though some people can’t answer as clearly as you’d have hoped. But you still should respect them.

    Feel free to ask more questions in this thread or privately, I’m sorry that my peers are so unwelcoming.


    Also, you’ve exceeded the character limit so “ir identity, and engaging in transphobia?” got cut off from your title. Unlike on Reddit, you can still edit it on Lemmy.