I've been looking for some good simulations of spring-mass networks with customizable parameters. Those I find are usually fairly simple, with uniform masses and springs, each connected at right angles to adjacent masses (i.e. six connections from each face in a cube setting, which is the most complex simulation I could find). I would like to explore the dynamics of a less uniform system, i.e. the effect of a large mass with many connections to smaller masses, how those smaller masses respond if they are more interconnected, etc. So I was wondering if anyone has some suggestions for a good simulation tool that they may have stumbled upon during some coursework or similar? I am in particular interested in the visual representation of the time evolution of such a system, so some kind of tool that generates an animation would be ideal.

Is my best bet perhaps to use the physics engine of e.g. the Godot game engine (Jolt physics) or whatever solver is used in Blender?

I have a Thinkpad T470s running Linux Mint where the batteries suddenly stopped charging. The batteries are supposedly new (the laptop is a refurbished one) with battop showing a cycle count of only around 20 for both batteries when they stopped charging. The laptop is now running on mains only and will die once it is plugged out.

It seems as if it is the main battery (00HW022) that is defective, as battop first showed a voltage of around 5V, and then later did not register in battop at all. The secondary battery (01AV405) shows a voltage of 12.5V, but it is also not charging.

Locating local replacement batteries for the 00HW022 was a little more difficult than I expected with these machines. I have a replacement 01AV405, but I don't want to install it now as I suspect it is not the problem.

1. Can I remove just the 00HW022 and expect that the other battery can begin to charge again and allow the laptop to run on only that?
2. Is there a reason I would have a hard time finding a replacement 00HW022, or is that just a skill issue? Do they go under other names?
3. Is there any reason to believe that Linux is making things difficult here? I suspect that everything related to batteries is handled by the firmware and Linux is only reporting on diagnostic values and have nothing to do with the charging itself - is that correct?

I have completely forgotten about the SecureBoot key expiration that is coming on Wednesday. I don't have SecureBoot enabled on any of my devices, but I wonder if it could cause issues down the line if I don't ensure that the keys have been updated?

Are anyone up-to-date on the status of the syncthing-fork on Android, following the drama of catfriend1's sudden disappearance and the less-than-trust-building behavior of researchxxl? Did they rebuild that trust? Was it forked again by someone more trustworthy?

I have a setup that involves syncing files from my laptop to a server regularly. This has been working pretty well for a long time, apart from the odd verification failures. Both machines are WiFi-connected, so when I attempt to sync from a room far away from the WAP, the failure rates for larger files are higher, I would guess due to packet losses.

Today, I am sitting at the same spot I usually do this successfully with no issues, and I get errors after errors after errors. The odd one will go through after multiple tries, but generally it is just not working properly. I also got a broken pipe today during one attempt. This is not the first time it happens, and I feel crazy for thinking it is correlated to do bad weather, as if that should somehow affect my indoor WiFi quality...

Anyways, I tried to look at the rsync versions on the sender and receiver, and noticed that while both are the same application version number (3.2.7), they operate on different protocol versions (sender: 31, receiver: 32). I found this a bit odd, and I was unable to figure out how I would force my laptop to also use protocol version 32. I know I can pass a --protocol=NUM argument, but that seems to be used to force the sender to use an older version in case the receiver only has an older version, which is the opposite of my current situation.

And what is the likelihood that this is the cause of my woes?

My e-book management currently consist of storing a bunch of files, both .epub, .pdf and .azw3 stored either by author (fiction) or by topic (non-fiction), for various sources (purchased e-books, downloaded via University subscriptions, Project Guthenberg and some from Library Genesis/Anna's Archive). For some time I'd been wanting to organize them better, with a web UI to download in a format of my choice and to be able to share with others.

I first found out about and became interested in Booklore, as it seemed to fulfill my needs, and decided to research it more in-depth and oh boy, what drama... I am aware of the Grimmory fork, but I am not touching that with a ten-foot pole until it has matured and can be generally considered to be trustworthy.

So instead I started experimenting with the more established Calibre + Calibre-Web setup (I decided against Calibre Web Automated, as that also seemed a little shady). I find the UI of Calibre-Web to be fine enough for my use, but would have loved to be able to edit more metadata in the UI (it appears I am unable to add a cover for instance). But the Calibre server has so far been very frustrating to work with for me, and does not fit my desired workflow at all. I basically want to be able to dump my files onto my server (and continuously sync local files to the sever), get the metadata mostly automatically sorted with easy options to amend missing metadata (preferably from a web UI and not that screen-share thing that doesn't even work in Librewolf). I have not found a way for it to automatically import new books, and if I reimport from the directory I dump my books in, it will reimport some of the books where the metadata was changed (some it will realize is the same, and ask to skip), so I end up with multiple duplicates. I work under the assumption that its mostly user errors so far, and I will try to master it better, but so far I find it very intuitive.

I will be looking more into Kavita as well, but so far I know very little about it.

How are you setup in your homelab for e-book management? Would love to see some examples of well-established workflows that works for you.

I'm printing some Gridfinity bins for some drawers, and one of them needs to be quite tall to fulfill its purpose (18u, ~130mm). I took a shortcut and generated one from this generator using the default wall thickness and printed using Prusament PLA. This resulted in the walls falling in on itself, and my second failed print.

In hindsight, considering the wall thickness of 0.95 mm, this seems pretty obvious to me now. I want to give it a second go, but beef up the wall thickness and make sure there's some proper infill between the outer walls to keep it stiff.

At the same time I don't want to waste too much filament, so I want to hit a sweet spot of sufficiently thin walls and sufficiently low infill percentage, while avoiding another failed print.

Anyone have good experience with these kinds of prints that could give some input on a rough estimate for what I should aim for here?

I am using Adaptive Cubic infill by the way, but for no other reason than that has become my default infill pattern after some previous suggestions made here.

I work in a corporation with an IT-department that is all in on whatever Microsoft is offering. My team has for some time gotten more and more autonomy in tooling as IT is overloaded and forced to relinquish some control, but we still rely on them for supplying compliant machines that have access to our resources.

I requested a Linux machine just over 5 months ago, and I finally got it this week. It is running Ubuntu with GNOME, not my first choice, but the only thing that is Microsoft Intune compliant as far as I know.

So far it is such a relief. A better specced machine with less bloat running on it. It should be far between any OOM-issue I get now... Slightly annoying having to use Edge for any service requiring corporate SSO, but I'll swallow that pill...

cross-posted from: https://lemmy.ml/post/39653709

I am currently looking into getting a keyboard to use in jamming sessions. I have so far been partial to Roland GO:KEYS 5 (this over the 3 due to the additional inputs and an acceptable imo price difference). This (around 500 EUR) is around the max I want to give for it.

But, as far as I can tell, it does not have a proper loop function. It has a layered recording-function, but this would require me to play through the full song.

So I have two questions:

1. Are there any keyboards anyone of you would recommend in roughly the same price range that has a looper?

2. Could I use my Boss RC-5 for this, plug the keyboard into input A and plug it back into the keyboard from output A? I would like to avoid buying a new speaker for this, and tge loop pedal would also be connected to my guitar and to the amp.

I am currently looking into getting a keyboard to use in jamming sessions. I have so far been partial to Roland GO:KEYS 5 (this over the 3 due to the additional inputs and an acceptable imo price difference). This (around 500 EUR) is around the max I want to give for it.

But, as far as I can tell, it does not have a proper loop function. It has a layered recording-function, but this would require me to play through the full song.

So I have two questions:

1. Are there any keyboards anyone of you would recommend in roughly the same price range that has a looper?

2. Could I use my Boss RC-5 for this, plug the keyboard into input A and plug it back into the keyboard from output A? I would like to avoid buying a new speaker for this, and tge loop pedal would also be connected to my guitar and to the amp.

cross-posted from: https://lemmy.ml/post/36080579

I got a Prusa CORE One earlier this year, and so far I've been very happy. I have not ventured outside of the default settings though, and I use their own filament (only PLA). This has worked perfectly fine so far, but now I ran into an issue, and I figure it's time to come out of the "default settings"-bubble and learn some more about this stuff.

I am trying to print a Gridfinity holder for a rolling pin, so I tried to cut out a appropriately sized cylinder in a template with a boolean operator in Blender. When the print got to the concave portion, the print started to fail - uncertain how to best explain it, but the overhangs over the infill did not properly bridge and the filament started to warp so that the print head would hit it on the next pass (and make some nasty scratching sounds). I stopped the print when I noticed this. See an image here:

I am uncertain whether this is due to the model being poorly optimized for 3D-printing, if the printer settings for the filament were off or if I could've tweaked the slicing settings to achieve a better result.

Is it obvious, looking at the image, what the primary reason for this failure is?

Note: I've ended up printing this again already with a regular rectangular cutout instead of a cylindrical one, so I am just trying to learn more about what made this fail to learn more.

I got a Prusa CORE One earlier this year, and so far I've been very happy. I have not ventured outside of the default settings though, and I use their own filament (only PLA). This has worked perfectly fine so far, but now I ran into an issue, and I figure it's time to come out of the "default settings"-bubble and learn some more about this stuff.

I am trying to print a Gridfinity holder for a rolling pin, so I tried to cut out a appropriately sized cylinder in a template with a boolean operator in Blender. When the print got to the concave portion, the print started to fail - uncertain how to best explain it, but the overhangs over the infill did not properly bridge and the filament started to warp so that the print head would hit it on the next pass (and make some nasty scratching sounds). I stopped the print when I noticed this. See an image here:

I am uncertain whether this is due to the model being poorly optimized for 3D-printing, if the printer settings for the filament were off or if I could've tweaked the slicing settings to achieve a better result.

Is it obvious, looking at the image, what the primary reason for this failure is?

Note: I've ended up printing this again already with a regular rectangular cutout instead of a cylindrical one, so I am just trying to learn more about what made this fail to learn more.