monotremata

joined 1 year ago
[–] monotremata@lemmy.ca 2 points 3 days ago

(For math people: this can be modeled as a hypergeometric distribution with N=48, K=13, n=8, k=0.)

I suspect most people haven't heard these terms. But they should have studied basic combinatorics in high school, and that's all it really is. You had a pool of 48 people from whom to choose 8, but you happened to choose them from the specific pool of 35 not up for reelection. So the likelihood of that happening randomly is just 35 choose 8 / 48 choose 8, which is indeed 6.2%.

[–] monotremata@lemmy.ca 8 points 5 days ago

Let me know when they make the shift from "wanting themselves not to be feeling the pain" to "wanting different policies that protect everyone," I guess.

[–] monotremata@lemmy.ca 5 points 5 days ago

Same. Uggh. It was a bit like a fever, but so much worse. I was absolutely freezing and couldn't stop shaking and sweating, but I also couldn't really manage to distract myself with anything because my brain didn't work, so I just had to lay there and wait. There was also this overwhelming, crushing ringing sound and a feeling like old analog TV static, along with a splitting headache. Thankfully my family were around, of whom I was dimly aware, so I could tell that time was probably passing, and I could kind of gauge that I probably wasn't getting worse, or they'd take me to a hospital or something. That's about the limit of what I was aware of, though. It just felt like it went on a really long time. I suspect in reality it didn't last more than a few hours. I should ask; I'm sure one of them has a clearer memory of that aspect than I do.

[–] monotremata@lemmy.ca 8 points 6 days ago

Even if it was, why does it fucking matter?

Kind of a weird take in HistoryPhotos. This doesn't look like AI to me, but if it was, I would want to know that, and would think it didn't belong here.

[–] monotremata@lemmy.ca 9 points 1 week ago

I ran into this just yesterday. My dad's Windows 10 computer was reporting our printer as offline, even though it wasn't; it would queue print jobs, but never actually send them. It did this even though it had been printing normally less than half an hour beforehand. It's connected over Wi-Fi.

And I remembered having solved this problem once before, ages ago (I think like twelve years ago?), by digging through the old Microsoft forums and Google search results, and I had a dim recollection of what sort of thing the solution had been, but not the details. So I figured that, most likely, the fix had gotten undone, probably when I switched him to IoT LTSC edition so he could keep getting security updates. (Both my parents were basically unwilling to switch to 11.)

But when I pulled up search on a browser to see if I could reconstruct the solution I'd found all those years ago, instead I got all this SEO and AI slop. Page after page that claimed to have relevant information, and didn't. After about fifteen minutes I decided I was better off trying to dig through the settings myself and see if I could reconstruct it from my own memory, kind of like driving through an old neighborhood and seeing if I recognize any landmarks.

I did manage to fix it that way. There's some kind of dumb aspect to the way Windows gauges whether a printer is online that doesn't work if it's connected over wifi. The workaround is to go into the properties for the printer, tell it to change the settings (which brings up a very similar-looking but not actually the same panel), go to the "ports" tab, scroll down to the TCP/IP port with the address of the printer, choose "configure port" which brings up yet another dialog, and at the bottom of that check the box marked "SNMP enabled." SNMP is "Simple Network Management Protocol," and lets Windows check the status of the printer in a more sane manner. After doing this the printer reports itself as online and prints normally.

But yeah, I had to rely on my rotting meat storage because our global worldwide network of supercomputers now only serves up blather designed to look like it might hold solutions but not actually contain any of them, because it's more profitable to delude you into reading endless ad-filled pages of slop than to solve your problem and let you leave.

[–] monotremata@lemmy.ca 5 points 2 weeks ago

And then there's the federal minimum wage for tipped workers, which is a paltry $2.13/hr. If the tips don't bring that up to at least match the normal minimum (the $7.25/hr figure) then employers are supposed to pay them more to make up the difference, but they basically never do. Tip theft is also super common, including with some of the online ordering apps.

[–] monotremata@lemmy.ca 3 points 2 weeks ago

Honestly the idea that parasites all share a single, simple method of reproduction is the silliest thing in this comic. There's a cordyceps fungus that not only has a stage in an ant, it then swells and reddens the abdomen of the ant, takes over the behavior of the ant and forces it to climb to the top of a stalk of grass, and has it wave in the air until a bird mistakes it for a berry and swoops down and eats it. At this point it has a whole other phase of its life cycle inside the bird until it finally releases its spores in the bird's droppings.

(I probably have a few of the details here not quite right, as it's not my field of expertise, but it's along these lines, including the behavior modification and the two separate host species.)

There are so many kinds of parasites, and they do so many crazy things.

[–] monotremata@lemmy.ca 5 points 3 weeks ago

I've seen the term "plutonomy" (like, an economy for plutocrats) to refer to this. At this point almost all economic activity involves the rich, because the rest of us don't have enough money to amount to much.

[–] monotremata@lemmy.ca 12 points 3 weeks ago (4 children)

I'm a little thrown by "20% efficient" when paired with "allows 94% of solar energy to pass through." Are they saying it captures 20% of 6%, i.e., 1.2% of the incident solar energy? Or are they saying 20% is captured and 94% passes through for a total energy recovery of 114%? (This latter is not physically possible, but that doesn't mean it's not what they're saying.)

Basically I would rather they listed the power output of the solar system in Watts.

74
Moire/Vernier Radius Gauge (www.printables.com)
submitted 4 months ago* (last edited 4 months ago) by monotremata@lemmy.ca to c/3dprinting@lemmy.world
 

I previously posted this on Reddit, since it reaches more people there (and I didn't want to post everywhere at once, as it makes it harder to keep up with the comments). Sorry about that.

This is a tool for measuring the radius of a circle or fillet from the outside; it uses a moire pattern of slots and lines to enable a direct reading of the values from a vernier scale.

A video of a broken-open version makes it a little easier to see how the moire and vernier features operate: https://i.imgur.com/Ku2nBkq.mp4

More photos of a slightly earlier version are here, including the tool being used for actual readings: https://imgur.com/gallery/moire-vernier-radius-gauge-design-3d-printing-ajy0GBg

I was inspired by this post: https://makerworld.com/en/models/1505553-adjustable-chamfer-gauge#profileId-1575605

which is a gauge which measures chamfers using a sliding probe. The same user had also posted a radius gauge, which worked similarly, but it was much larger, using gears and two racks in it to amplify the motion, which I didn't initially understand. I asked about it, and he pointed out that, because of the geometry of the probing, the slider only moves a small proportion of the length of the actual radius being measured--about (sqrt(2)-1), or 0.414mm per mm of radius. Since we're drawing the marks with a 0.4mm nozzle, it's not really possible to make marks that close together and still have them readable.

So I thought, I bet you could fix that with a vernier scale. And then I had several thoughts all at once--that a lot of people are kind of scared off by vernier scales, and also that I bet you could fix that with 3d printing using the relationship between moire patterns and vernier scales. I don't think I've seen this done before, but it probably wasn't really practical before 3d printing. Arguably it's not entirely practical now, as the deep slots and parallax effects can make it a little hard to actually see the markings. But it was a fun experiment, and I think the result is eye-catching enough that it's probably got some educational value in getting people to actually think about how it is that vernier scales work. (It might even have educational value for things like number theory...e.g., it's important that the vernier factor involve relatively prime numbers, in this case 9 and 10. Can you see why?)

Anyway, hope folks here find it interesting too.

 

Bear with me for a moment, because I'm not sure how to describe this problem without just describing a part I'm trying to print.

I was designing a part today, and it's basically a box; for various reasons I wanted to print it with all the sides flat on the print bed, but have bridges between the sides and the bottom to act as living hinges so it would be easy to fold into shape after it came off the bed. But when I got it into PrusaSlicer, by default, Prusa slices all bridges in a single uniform direction--which on this print meant that two of the bridges were across the shortest distance, and the other two were parallel to the gap they were supposed to span. Which, y'know, is obviously not a good way to try to bridge the gap.

I was able to manually adjust the bridge direction to fix this, but I'm kinda surprised that the slicer doesn't automatically choose paths for bridging gaps to try to make them as printable as possible. I don't remember having this issue in the past, but I haven't designed with bridges in quite a while--it's possible that I've just never noticed before, or it could be that a previous slicer (I used to use Cura) or previous version of PrusaSlicer did this differently.

Is there a term for this? Are there slicers that do a better job of it? Is there an open feature request about this?

Basically just wondering if anyone has insight into this, or any suggestions for reading on the subject.

Thanks!

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