• 3 Posts
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Joined 2 years ago
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Cake day: July 9th, 2023

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  • I think the availability of AA batteries is higher, 18650 is much less standard than AA in most people’s homes. I would rather have options, so saying AA but having a swappable battery tray is how I would go, but I like kludgey stuff anyway.

    That said, I just did a battery replacement for a lithium pouch on some TWS headphones and it was a fairly simple process. Making it a port rather than soldered wires would make it much easier and would make battery replacement a quick and routine task. Hopefully more companies will more towards ports for batteries and maybe even a standard port that is the same for a given voltage/amperage combination so swapping out can be done with confidence.



  • I was expecting answers but got jokes, not disappointed, just enjoying the jokes.

    As for asymptotes, many mathematical functions have a value they are going towards but never quite reach. One example would be to start with 1 and then halve it, then halve it, then halve it, and keep going forever. It will trend towards 0 but never ever reach it.

    Another example of approaching 0 is y = 1/x which is a cool graph. There is a curve which starts just to the right of the Y axis at maximum Y value and comes almost straight down, curves out to 1,1 then shoots out along towards the X axis almost but never reaching it. The cool thing is it does the exact same in the lower left quadrant with the line coming from the negative X axis, passing -1,-1, the shooting down the Y axis.



  • Handedness is not constant over the animal kingdom.

    Kangaroos and wallabies tend to be left handed, though wallabies seem to be right handed for strength tasks. In dogs, horses, and cats females have been shown to be left handed, while males are right handed. All of these are tendencies and not at all strict, so specific inviduals may be left or right handed with no regard to their sex or species, but the trend is there.

    The level of handedness that humans have is really white extreme compared to our closest cousins. Other primates are far less handed and one of the things that drives this may be tool use and associated teaching. If you are teaching someone how to do something and they have opposite handedness to you it is harder to teach, and also shared tools are easier to manage if they are not in two different versions.

    The causes seem to be a mix of genetics, developmental cues, and maybe brain structure, though the exact amounts of each and whether there are other factors are unclear.


  • I will say, as a Dvorak user, I think it would be awful for mobile. I don’t know the mathematics for calculating it but Dvorak assumes four fingers per hand spread evenly across the keyboard.

    I wonder what the most efficient layout would be for single digit letter pecking. I can imagine it would be different to both Dvorak and Qwerty, but what exactly it would be I don’t know. Maybe separating most likely next letters by side and having some consistency of vowels on one side, consonants on the other, but all of the stuff about rolls and sequences would be completely changed. Maybe differently sized buttons for more common letters, or reducing the number of shown letters to have a few flick letters that you swipe in a direction to get them? Maybe just having the top ten most common letters displayed as single buttons and then the remaining 16 as four swipe keys?







  • Put simply the radio broadcasts a sort of hello message to the tower so the tower knows where to listen (this is about signal direction or beam shaping, but imagine the eye of Sauron swiveling to see Frodo). This includes the identifier of the handset, the IMEI number, so that the tower can keep track of who is who. The second step of getting connected to the network is done with the details inside the SIM card, specifically the IMSI number.

    If your phone has no SIM card you can still make an emergency call. You can also have an eSIM which is a software version of the SIM card. In both cases you can bypass the SIM and get connected.

    If you turn airplane mode on the radio is powered off in theory, but this is not absolutely guaranteed. It should be off, the system will report it is off, but there are fringe cases where it may still be very slightly active, usually from malware or similar things.

    So no SIM means no IMSI, but the radio itself has the IMEI and that handset is hard coded to that identifier. If the radio powers on it will broadcast the IMEI to negotiate connection with or without the SIM and IMSI.


  • It isn’t really clear from what you have said if you are using a laptop or desktop. If you are using a laptop chances are you only have one primary storage medium, likely an HDD or SSD. If it is a desktop it is more likely you have or can have two drives. If you have the option of having two entirely separate drives you can keep Windows installed on one drive and Linux on the other. You could select your boot device on startup and the chance of one messing with the other is reduced a lot.

    A potentially better way to learn is to either install linux on an old or spare machine or to just boot off a live USB. The great thing with a live USB is you can access the system, use the software management stuff, try out finding settings and getting things done, all while being able to just reboot and have everything go back to normal after. If you want you can even make the USB a persistent install, so changes hang around and allow you to keep using the system in Linux with your changes over multiple reboots.

    That all said, my honest recommendation is to use VirtualBox or a similar program. VirtualBox lets you run a virtual machine and install Linux on it without risking anything on your main system. You can learn how to do software updates, install new programs, configure things, and so on all while touching nothing on your system. Your machine can keep working as normal in Windows, you can learn with no risk, and you can compare different versions of Linux to see what you prefer. The process for setting up a virtual machine in VirtualBox is fairly simple and should only take about half an hour to do, so it isn’t a big time investment.


  • The unfortunate thing about people is we acclimatise quickly to the demands of our situation. If everything seems OK, the car seems to be driving itself, we start to pay less attention. Fighting that impulse is extremely hard.

    A good example is ADHD. I have severe ADHD so I take meds to manage it. If I am driving an automatic car on cruise control I find it very difficult to maintain long term high intensity concentration. The solution for me is to drive a manual. The constant involvement of maintaining speed, revs, gear ratio, and so on mean I can pay attention much easier. Add to that thinking about hypermiling and defensive driving and I have become a very safe driver, putting about 25-30 thousand kms on my car each year for over a decade without so much as a fender bender. In an automatic I was always tense, forcing focus on the road, and honestly it hurt my neck and shoulders because of the tension. In my zippy little manual I have no trouble driving at all.

    So imagine that but up to an even higher level. Someone is supervising a car which handles most situations well enough to make you feel like a passenger. They will switch off and stop paying attention eventually. At that point it is on them, not the car itself being unfit. I want self driving to be a reality but right now it is not. We can do all sorts of driver assist stuff but not full self driving.