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Does anyone else get anxious making sound when they move?
  • You too? My dad didn't give a shit, but my mom could hear everything in any state of sleep.

    It taught me to be super quiet as well and it's a skill that I still know to this day. The anxiety started to fade once I learned this was a super power.

  • Another One Of Russia’s Nuclear-Proof Transports Just Got Blown Up In Ukraine
  • I have heard a few things, TBH. Everything in the range from simply vaporized and hot to the vaporized metal being in a near plasma state. Shrug.

    Wikipedia gives a few numbers ranging from 660K to almost 1200K (copper melt temp is 1358K) from testing it quotes. It seems to be dependent on the cone alloy and the explosive type.

    In practice, it's probably is all over the place in regards to temperature. If you can round up a few RPGs, I would totally be down for some testing...

  • oh, sovol. get some quality assurance. sv06+ x pulley is off center
  • you'll be doing the QA and will in fact be working on the parts / product to get it to where you need it to be.

    Absolutely. Unless a person wants to spend thousands of dollars on push button solutions that cover every imaginable use case, customization is the way to go.

    For solid machines, the customer should already have an idea about what parts need to be modified. If a machine was advertised to mill a widget at +/-20% tolerance, cool. If you want to spend $500 more on a custom pully to get withing 5%, awesome. Precision is expensive and customization is niche.

    For cheap machines, everything is generally ravaged by bean counters at every level of design and manufacturing. As long as people understand this and can make repairs, that is sometimes OK.

    While I feel OPs pain of finding a 2¢ part that was 0.3mm off center, I can only just shrug it off. A pseudo-premium 5¢ part or building a jig for a worker to test each gear would have been quite expensive and it would probably tack on $2-$5 to the end product price. ($2-$5 actually matters on sites like Amazon or Temu and could potentially cost thousands in lost sales due to product placement.)

  • Coworker says smashing Japanese beetles will attract more?
  • I think I remember something about other insects that may get triggered to attack when one is killed. (I am not really sure though. It might have to be a stingy-type insect, but I couldn't Google anything about it.)

  • Another One Of Russia’s Nuclear-Proof Transports Just Got Blown Up In Ukraine
  • As an example, RPGs use shaped charges to send a jet a molten copper through armor steel. Even though the devices may seem antiquated, they are extremely effective at burning holes through tanks. If that molten jet happens to come in contact with ammunition, it's generally game over.

  • oh, sovol. get some quality assurance. sv06+ x pulley is off center
  • That sounds about right. QA is expensive and time consuming, so it's left up to the customer. This applies to every single part in the supply chain.

    If you want a set of mitsumi linear rails for real precision applications, it's going to cost just as much or more than that printer.

    This is not a "buyer beware" rant, but the buyer should know they aren't paying for consistency or precision. I am basically saying that for these printers to work reliably and with proper precision, you need to tear them down yourself and inspect each bolt.

    I buy cheap Chinese stuff all the time, but my process is to tear the product down and find where costs were cut and look for any serious dangers.

    Svol is well known enough that you should be able to get replacement bits for free. Or not. It's a crap shoot, TBH.

  • Is really possible to understand the magnitude of ones own brain?
  • False perspectives, sure. That is a possibility. False or not, that reasoning forms memories which must be stored somewhere. Those memories are what you might consider "new data" that comes from "new connections".

    Understanding something is based off what you already know or just learned, which is memory. Logic and reasoning is partially instinctual and mostly memory. Decision making is likely not strictly based in memory, but more based on memories.

    I think where you might be getting something mixed up is undersanding vs. memorizing and how the brain stores information. If I am understanding you correctly, you are thinking of data like a computer handles data: A zero or a one is a bit. Eight bits are in a byte. PC memory can hold X bytes until it gets full, and then game over.

    Our brains simply don't work like a PC and we naturally store patterns, not specific raw data.

    So, if a neuron has 3 inputs and 3 outputs, it has 6 connections to other neurons. With a computer, you need to lay out a few arrays and map each connection to each other. If we had a mess of neurons on a table in front of us to stick together, we would just need to remember to connect outputs to inputs and follow any other simple conditions we are given without strictly needing to memorize a 1:1 connection map.

    Pattern matching is core functionality for our brains. So much so, we actively seek out patterns whenever we can. (Reference: apophenia and pareidolia)

    For things like simple number memorization and even speech, our brains are able to do those things based on a series of different patterns that we stick together automatically. By doing so, we can use and reuse groups of the same neurons for seemingly different tasks. Its essentially built-in data compression, for lack of a better term.

    If we were to ignore real constraints like the time it would take to map out all of the connections in our brain, we would naturally start to store patterns of neuron connections, patterns of how those neuron clumps interact and other key features of operation.

    My reasoning is that we would start to get extraordinary "compression rates" for this data. If we memorized a complex pattern of 100 neurons, we could likely reuse that "data" a million times over for other major components of the brain.

    By the very nature of how we store information, data loss will happen and it's unavoidable. We would need a new form of brain that was capable of storing blocks of data 1:1.

    Also, your question is also a paradox. if we were to say we a brain would need to be double the size to store itself, then you would need a brain four times the size to store both of those brains. A brain storing itself is still a single brain so this turns into a recursion nightmare fairly quick.

    If we doubled the size of our brains, we could probably do some amazing things and our memories might become phenomenal. However, the way we learn and store information is basically the same and probably still wouldn't allow us to exactly store a million prime numbers in order.

    The summary of all of this is that you aren't accounting for memory patterns and natural data loss and there are very simple reasons that a brain doesn't "fill up".

    Edit: Psychedelics are not inherently dangerous. Neither is THC or many other compounds. Mixing drugs and/or improper dosages is what is actually dangerous. There are probably more legal drugs that are riskier than illegal ones, actually. I would consider alcohol to be a substance that carries more risks, mainly because it is legal almost everywhere.

  • Trying to understand JSON…
  • I don't get it. The key still gets declared, but it's value is null. "name" in an empty object would return undefined, not null, correct?

    (Yes, this joke whooshed, but I am curious now.)

  • Is really possible to understand the magnitude of ones own brain?
  • I have been to some interesting places in my own brain with the help of psychedelics. While I have experienced different levels of self-awareness, the possibility of that "filling up my brain" is likely not possible.

    There is a part of the brain that psychedelics specifically affect that functions as kind of a traffic regulator. It typically only directs signals from one part of the brain to another part. Psychedelics open these pathways up and allow for information to flow to in all kinds of directions. (Synesthesia, sensory confusion, is an example: Feeling colors and seeing sounds.)

    What the experience does for me, is that I seem to gain more awareness into how my brain works. It's like I can stand back and watch how my brain processes things. My subconscious is pulled into full view and I can almost tinker with it, in a way. Some theories suggest that the colors and geometric patterns people tend to see is our actual brain operations being leaked into the visual cortex and/or the fractal patterns are the result of actual "data loops" caused by psychedelics allowing information to pass around freely. (Not my theories, btw.)

    Now, you may read this and think: That dude is just tripping! (And you would be very much correct.) The thing is, every experience I have and anything that I feel is already in my brain. The data is already there, but how that data is processed is vastly different. Even if I am perceiving parts of my brain that I couldn't before, it's still just the same neurons that were always there.

    So, what I am basically saying is, is that my self-awareness temporarily becomes self-aware. It's a shitty description, but it's the closest I could get to matching the situation you were asking about.

    I still develop memories, almost as normal. Some memories stick and some fade. All that really happened is that a few neuron weights got shaken up and it all becomes a few new pathways with a similar number of neurons as before. (Neurogenesis and dendritic growth as a result of psychedelics is a different subject and I wouldn't think it would be part of the recursion-type situation you are asking about.)

    Memories become integrated with existing ones, basically. While vastly different in many ways, our current AI tech has a set number of "neurons" it can work with in any given model. You can train those same bunches of neurons with millions of different patterns, but the actual size of the neural network doesn't change, no matter how much data you cram into it. With slight changes to when neurons fire, you are using specific pathways of neurons to save data, not necessarily using the neurons themselves.

  • Sparky
  • TeePublic. We got the shirts a couple of days ago and they seem decent enough. I can't vouch for one tee shirt place over another, though. I probably over paid, so you probably want to look for better deals if you can find one.

  • Would celite/carbon vacuum filtration perform well enough to remove photopolymers from isopropyl alcohol?

    I am simply on a quest to find an effective non-distillation method for purifying isopropyl alcohol used for rinsing resin 3D prints.

    I have seen some elaborate systems for curing and then filtering resin that is suspended in the isopropyl by running it through standard carbon water filters. That just seems a bit over-complex and does a poor job of removing dyes. In some cases, the filters are not fine enough and the isopropyl will eventually get "sticky".

    It seems to me that a finer filtration system would work much better. Carbon and celite should catch most of the monomers and oligomers, but I am not sure about the photoinitiators and other additives.

    Distillation is obviously the best method for purity, but there may be a worse cleanup and a higher fire hazard risk.

    Are there better materials that I could use for filtering besides celite and carbon? IPA is tiny compared to the rest of the molecules I am dealing with so filtration seems viable.

    (I should note that I would bulk develop the used IPA in clear plastic containers in the sun for a day or two first.)

    4
    [Request] Fork an open source version of Connect (suggestions and discussion welcomed)

    Before I get into my comments, I just want to ask that if you haven't bought the dev a coffee, please buy him a coffee. Personally, I have bought several with the intent of covering for those who cannot. Our dev has earned it.

    I am just going to say that Connect is awesome. Even through early development, when there were huge issues, it progressed at a good pace. And yeah, it has gotten super stable and functions great as a simple and easy to use Lemmy client.

    I would also like to make clear that I respect this app as the sole devs creation. He/She is 100% able to direct this project as they see fit. Period.

    However. One person development teams can be a serious risk to the longevity and stability of an app. People get tired and burned out. People have actual lives outside of working on a single app. People can just vanish from dev work. That is all normal.

    With the recent Lemmy instance updates and some subtle bugs that are showing, my concern is that it may become a much larger challenge to keep this app up to date. In my limited dev experience, core API changes (or API bugs) are a royal pain in the ass to deal with. A person could spend more time just keeping their app functional instead of developing new features or working on minor bugs.

    I was hoping that people in this community that have experience with the development of large open source projects, can contribute ideas for our dev that may make it palatable to open this project up to additional contributors.

    I think the biggest things I would like to call out is that if this project is opened, it may damage any revenue that is being generated by this app for the dev and I don't want to see that happen. (People gotta work and people gotta eat. )

    What open source licenses are available that would keep full control of this app in the hands of the original dev? (Is that even a viable option?)

    Quite simply, other than opening this app up fully, I don't quite know exactly what I am asking for. It would be nice to keep full control of this app in the hands of the dev, while also allowing community development.

    Just to reiterate, this post is not meant to be rude or pushy. If anything I said came off that way, it was absolutely not the intent and offer a humble apology if it did.

    3
    [Resolved] Correct Anycubic R_E_R_F filename?

    Edit: Just copy the original filename, Chinese and all, to a custom RERF file. It tested fine with the factory tests and also custom test parts I made. I didn't test with only "R_E_R_F.px6s" as the filename as I proved the original filename works fine with custom models.

    Just got a new Anycubic Photon Mono X 6Ks and the RERF file on the included USB has Chinese characters in the name. ("R_E_R_Fchch.px6s" / ch being Chinese characters...) Does the printer require those characters for custom RERF test prints, or is it actually just "R_E_R_F.px6s"?

    The documentation is unclear and online searching is jumbled with several issues regarding this filename across different printer models.

    2
    I would like to start a simple business related to 3D printing, reverse engineering and 3D scanning. What are common pitfalls of first time entrepreneurs?

    I am business dumb, but I have a very unique mix of skills I would like to turn into a side hustle. Needless to say, there is going to be a huge learning curve for me.

    Sure, I could just sell 3D prints on Etsy, but I would rather focus on B2B type work with a more hands on approach than the Chinese print farms/PCB manufacturers. (I'll start an Etsy shop for practice, but that particular market seems extremely saturated.)

    So, if you have started a business before, what are some basic things that you wish someone had told you before you did? Are there good books or other references I could use?

    22
    [Bug] Strange pinning issue? A pinned post from another instance in All on .ca

    Strange. I don't see this as a pinned post on that community, but yet, there it is. Did an admin pin a post from another instance on .ca somehow or is this a bug with Connect? (Strange things are happening like this since the last Lemmy update. I can't tell if it's a Connect issue, or a Lemmy issue.)

    3
    [Bug] /c/new is listed under other communities. NSFW tiles blurred but not hidden. (lemmy.ca / 0.19.4)

    That feed is not /c/cat on lemmy.world, it seems.

    I just logged out and logged back in with no change. I'll clear my cache to see if that helps and will update this post if successful.

    Edit: Clearing the cache did not help. Must be a Lemmy API issue?

    Edit 2: NSFW communities are not hidden in the faux community feed either. Thankfully, they are blurred, but not hidden. Posting a comment with a picture from what was supposed to be lemmy.world/c/world. (Did I use "faux" correctly? I rarely use that word, so hopefully the intent shows.)

    Edit 3: Ok, weird. cat on lemmy.world is broken from my account on .ca, but other communities are not, like business on lemmy.world. lemmy on lemmy.ml is also broken. The issue is more random than I thought.

    2
    Checking and charging HVAC: Plausible DIY?

    I am very much a DIY'er and doing my own HVAC repairs have never been out of the question. Actually, I have rebuilt a couple of systems, less the pressurized parts of the system.

    HVACs are great until they aren't and the need for repairs always comes up at the worst possible time. It would be nice to know more details for those reasons.

    If you ignore the direct question about charging an HVAC, there could actually be a small, slow leak in my system as it stands. That'll get troubleshot in due time. (Still, I don't think I have ever had a system that didn't need the system to be topped off after a few years, even with no detectable leaks...)

    It doesn't seem difficult: Ensure system is at correct temperature; attach a gauge; depressurize/pressurize as needed.

    There has to be some "gotchas" in there somewhere. The equipment is cheap enough and I am fairly sure I can source the correct refrigerant easy enough.

    Aside from needing to store and manage a small supply of refrigerant and that there are some annoying risks (like a system freezing over, etc..), what cost factor and equipment am I not taking into account?

    9
    If you knew in advance about being laid off, how would you YOLO the exit interview?

    I am fairly sure that I am being laid off with other Sr. Engineers tomorrow and need some ideas. Basically, I saw a calendar mistake by HR, so oops!

    Meh. It's gonna suck for a bit, but whatevers. Life is more important than a shit job. :)

    84
    [Identification] This is an ORSIS, but it looks like an F-17 that's been modified.

    I just stumbled across this beast that was previously owned by a Russian sniper. It's got characteristics of an F-17 but it looks like the stock as been drilled out in places (or replaced) and I am about 60% sure that those are Vortex optics. Any ideas?

    !

    !

    5
    [Solved][Request] Source instance shown at top of post.

    When browsing on lemmy.ca/c/all and I click through to a post, the local source instance and community for a post is shown as lemmy.world/c/hot. The source instance is something completely different and shown in the post info bar below the title.

    This can get awkward when I think I am commenting on a post I think is on lemmy.world or lemmy.ca when it might actually be lemmy.ml.

    Highlighting the source instance a little better would be super awesome.

    2
    My Lemmy Rule

    Edit: The above Connect filter only works for title posts. It doesn't seem to filter comments or community names.

    I mention this only because of some questions here and how people are going to the effort to censor out comments on this post.

    25
    Radio Lemmy @lemm.ee remotelove @lemmy.ca
    A Vibroplex Bug from the late 70's or early 80's

    Oops! I actually ment to post this in a ham radio community. RF is still RF, so it kinda fits here if you squint a little bit.

    3
    Have we been able to reproduce the conditions to bend rocks? (Even if in a lab.)

    Tectonic activity bends rocks all the time, even hard ones like granite. That takes a ton of heat, pressure and time. It also makes sense that in the right conditions, sheets of rock simply don't have the room to shatter so they must bend.

    Have we been able to do the same in a lab and would it have any commercial use? Bending a random bit of hard rock would be an interesting novelty, for sure.

    28
    How do different body parts (specifically shape) emerge from our genes?

    I am creating a simulation to evolve simple, multi-cell organisms. (Just for fun!)

    Neural networks are fairly easy to evolve, even more so when it's done by random mutations and not actual training. Build an ANN at random and introduce mutations with every generation. The ANNs that accomplish simple goals (by pure chance) live to duplicate with every evolutionary cycle. Fairly easy stuff.

    I am stumped when it comes to creating something that would simulate the genes that represent a body. After some reading today, there isn't much info on how cells form into specific shapes for arms, hands, organs, etc. (I am sure there is a ton of data, but I don't know what subject to Google.)

    Genes can create the patterns for specific chemicals and cells. How to cells then develop into functional body parts? What makes a heart the shape of a heart?

    I think that having a better understanding of that concept can help me develop a framework for physical evolution, even if it as a very tiny scale.

    (Putting the ANN in charge of controlling those different body parts is also easy. It's just a matter of allowing those physical traits to evolve first.)

    6
    InitialsDiceBearhttps://github.com/dicebear/dicebearhttps://creativecommons.org/publicdomain/zero/1.0/„Initials” (https://github.com/dicebear/dicebear) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)RE
    remotelove @lemmy.ca
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