• 4 Posts
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Joined 2 years ago
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Cake day: June 12th, 2023

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  • How did you do the layer lines?

    I tried to print one of these things once, with the layer lines perpendicular to the central axis. So just a tube standing straight up on the print bed. It didn’t work at all. The shop vac was inserted in one end and the other end into the machine. However this meant the interface in between was completely unsupported. With the hose hanging on one end, as soon as I moved the machine around in use, the thing snapped off across a layer line. I tried a couple more times with thicker walls, higher temps and more infill, but the layer to layer bond just wasn’t strong enough. I tried ABS and PETG, the PETG held up best but still broke within a couple of hours of use.

    So I ended up ordering an injection molded part, probably glass reinforced nylon or something like that and have been using that ever since. Still bugs me, because it seemed like a perfect time for the 3D printer to shine.


  • I have had to teach a subject in school. Part of my education was a minor where I had to teach a class for a trimester.

    I had to prepare materials (presentations, homework assignments, study material, quizzes and the exam), teach the class, answer student questions in person/mail/school system etc. There was a professor that helped me, was always present and officially taught the class otherwise the students grade wouldn’t count. But as it was my assignment the prof was very hands off and was there only as a fallback if I fucked up and to evaluate my performance. We got along pretty well and she gave me an excellent grade in the end.

    The class I taught was uni level cryptography, basically a math class. The math would get pretty advanced and a lot of the problems students had to solve required a long working out. There usually wasn’t an answer to the problems, the working out was the answer. The exam was also pretty though, but almost all of the students got a good grade and nobody failed.

    Feedback from students was that I was pretty strict, but they learned quickly and had a good time during the class. Remember these were 2nd year uni students, so discipline wasn’t an issue, everyone was there to learn and wanted to be there. Most of them were maths nerds themselves and loved the subject, which helps a lot. Ages of the students ranged 18-25. So my teaching was focused on the subject matter and not managing kids.

    Would I teach again? I don’t think so. It was a good experience to have, but I can see it get boring very quickly. Imagine teaching the same class trimester after trimester, year after year. Sure some new stuff comes along every now and then, but even in the more advanced classes you teach the basics, not the new stuff. As I enjoy the subject more than the interaction with the students, I don’t think I could do it for long.


  • Thorry84@feddit.nltoMicroblog Memes@lemmy.worldGuilty as charged
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    9 hours ago

    I think there are multiple, I read an article recently where it was stated by an expert. But checking back now they don’t link any sources except the name of the expert, which seems to be a respected expert in the field, but that means nothing in the end.

    This is one of the papers I could find within 2 mins, but I think there have been multiple papers on this.

    https://www.nature.com/articles/s41562-023-01791-7

    There has also been a lot of criticism on the original study that said blue light from phones was the issue, so there are probably a lot of response papers to be found about that.


  • I played the demo and I would recommend!

    I have about 100 hours in Hammerwatch, 200 hours in Heroes of Hammerwatch (mostly coop), but only 20 hours in Hammerwatch 2 (big miss for me). So for Heroes of Hammerwatch 2 I played the demo and was sold right away, played the demo again in coop and it was awesome as well.

    Looking forward to putting the hours in this one.


  • Thorry84@feddit.nltoMicroblog Memes@lemmy.worldGuilty as charged
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    17 hours ago

    Wasn’t it confirmed recently to be total nonsense and nothing to do with circadian rhythms? Compared to the sun a phone puts out very little light and the circadian rhythm only respond to slow changes in light, not on and off in a short time.

    It’s more about your phone keeping your mind active instead of relaxing and going to sleep. But if you already can’t sleep because your mind is churning on something, a bit of distraction might actually help. It’s very personal and not a clear cut rule on who has trouble sleeping from phone use or when to put down the phone.

    So it isn’t like using your phone before sleeping will never have an effect on how well you get to sleep. But it has nothing to do with blue light or circadian rhythms.











  • Thorry84@feddit.nltocats@lemmy.worldHe chose violence
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    6 days ago

    Wow that’s kinda sad.

    We had one that did that as well, but he was just dumb as nails. He would be laying down with his tail around him so it’s at his face (looong tail). Then he would hit himself in the face on accident with his tail, this would piss him off so his tail would start wagging in his face. This pissed him off even more so he would grab his tail and bite it, but as soon as he felt that he would realize what he just did and start grooming his tail. Playing it off like he didn’t just do something stupid, but was just grooming normally. He did this a lot, because he wasn’t always the smartest of the bunch.




  • Because when the Apollo project was ongoing, they only built what they needed to build. Everything was a prototype basically and there were usually different versions of everything going around. Afterwards a lot of the stuff was re-used for later programs, often modified or taken apart for parts. As the budget shrank they needed to be creative. Take a look at the work CuriousMarc and his team is doing with repairing and restoring old Apollo Moon hardware, along with documentation and preservation.

    Why can’t we simply build the Apollo lander today. Well a couple of reasons.

    First of all, like I said it were prototypes, so you’d have to figure out what design to use. All of the documents back then were on paper and not all of it is digitized by a long shot. The amount of documents they produced back then was crazy. And a lot of it was lost over time unfortunately. Puzzling all of that together would be quite some task. Most folk from back then are since dead or at the very least retired. And I for one sometimes forget entire projects I worked on, so good luck getting small details out of those people.

    Our idea of what is acceptable, a good idea and safe has changed since the Apollo times. A lot of the design back then included components that were very dangerous and toxic. Not only to be used, but also to manufacture, which we wouldn’t find acceptable these days. And things we’ve later learned were a bad thing to do. So the design would need to be modified to be safer, which would probably cascade into an entire new design.

    We’ve lost so much of the support infrastructure the program relied on. It’s hard to understate how much this matters. This is a big thing when people say the moon program was fake. It wasn’t just one rocket, one lander, one crew, it was millions upon millions of pieces of infrastructure supporting the whole thing. From jigs to electronics, test equipment, custom tools, handling facilities etc. All with their own backstory, design requirements, documentation etc. A lot of this has been lost, especially when it was outsourced at the time. You’d have to reverse engineer and re-create a lot of that.

    Time has moved on and so has technology. Whilst the Apollo program had some cutting edge stuff back then, these days it’s ridiculously outdated. It would be very hard to manufacture any of those components today. We’re talking about the first generation of integrated circuits, on very expensive ceramics. Using crazy analogue electronics, only understood by the best gurus at the time. Even mechanical computers were used, a lost artform last used in the 80s. You could start redesigning stuff to modern equivalents, but again that would probably snowball into just designing a whole new thing.

    Recreating something from that long ago is simply not possible I’m afraid. And even if we could, it would probably make for a pretty shitty lander compared to modern standards.