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Cake day: December 6th, 2024

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  • Aceticon@lemmy.dbzer0.comtoScience Memes@mander.xyzVirgin Physicists
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    1 minute ago

    More seriously, if you order it from an Electronics supplier, you can get a 6.2 Ohm resistor with a mere 1% tolerance (in some cases, even 0.5%).

    That said an EE, except in very specific cases such as reference resistors, would generally use a 10 or 5 Ohm one with 10% tolerance for any circuit that was supposed to be mass produced since it’s far cheaper and much more easy to source in the size you require.


  • Aceticon@lemmy.dbzer0.comtoScience Memes@mander.xyzVirgin Physicists
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    13 minutes ago

    This is EXACTLY how it went for me when I moved from a Physics to an Electronics Engineering degree at University.

    Also, the trying to understand how the various circuits worked from the point of view of “electrons moving” was a hard to overcome early tendency (even simple things like LC circuits, for example, are only really understandable as ressonant stable states and for complex circuits you really have to go higher levels than “electrons” to be able to understand then in any reasonable amount of time).

    On the upside when we got to things like how tunnel effect diodes worked, the whole thing was just obvious because of having had an introduction to Quantum Mechanics in the Physics degree. Also the general stuff about how semiconductor junctions work is a lot more easy to get if you come from Physics.

    (In summary: Physics really helps in understanding HOW the various components in Electronics work, but doesn’t at all help in understanding how to use them to assemble a complex structure to achieve a given objective. Curiously this also applies to Mathematics and Software Development)



  • In my experience that massively depends on the country: some countries such as the UK are as bad as the US when it comes to a captured Press who pride themselves on being “Opinion Makers” - which gets reflected on how much the locals trust the local press (at least some years ago it was the least trusted in all of Europe) - whilst in other countries the Press is a lot less polarized and has far fewer newspapers and TV channels which dedicate to “opinion forming”.

    My own experience moving from Britain back to Portugal was like night and day when it comes to Press Independence.

    Not to say that Press in the latter is this utopia of truly independent and professional Journalism, it’s just way less propagandistic and biased that in the UK and here some newspapers actually *gasp* try and be independent and have Journalistic Integrity (whilst in the UK pretty much only the satirical magazine Private Eye is a “no sacred cows” publication that speaks truth to power)







  • If you’re purelly seeding (as in starting to seed a torrent from scratch never having downloaded it from the bittorrent client you’re using or having done it a long time ago - days, weeks or longer), without port-forwarding it will simply not work and nobody can connect to your machine and downloade anything for that torrent because all those remote machines that are trying to connect to your client have no association with your machine on the Mullvad Router doing NAT translation.

    If you’re downloading a torrent and then leave it seeding for a while after the download phase is over, then it will usually work fine because the Mullvad Router doing NAT Translation still remembers the various remote machines that your machine connected to in the swarm for that torrent during the download stage, hence when those remote machines connect back trying to themselves download stuff from yours, it will know that’s related your machine and thus accept those remote connection and forward them to your machine.

    In practice this means that it if you leave your torrents seeding AFTER DOWNLOADING is over, usually (but not always as for torrents with very few peers the swarm is either too small or changes too fast) you can upload more than you downloaded, hence you’re not leeching.

    So if you use Mullvad and don’t want to be a leecher, always leave your torrents active and uploading after you’ve downloaded them.

    Personally I have mine set to 1.5 upload to download ratio and only seldom does it fail to reach it.




  • I don’t think your explanation of why it seems to work is correct.

    I seems to work (works in a limited way, even), because any remote machines that your bittorrent client connected to during downloading are temporarilly recorded on the Mullvad router on the other side of your VPN doing NAT translation as associated with your machine, so when those remote machines connect to that router to reach your machine, it knows from that recorded association that those connections should be forwarded to your machine.

    This is quite independent of people on the other side using port-forwarding or not.

    Port-forwarding on the other hand is a static association between a port in that router and your machine, so that anything hitting that specific port of the router gets forwarded the port in your machine you specified (hence the name “port” “forwarding”). With port-forwarding there is no need for there having been an earlier connection from your machine to that remote machine to allow “call back”.

    This is why at the end of downloading a torrent behind a Mullvad VPN will keep on uploading but if one restarts a torrent which was stopped hours or days ago (i.e. purelly seeds), it never uploads anything to anybody - in the first case that NAT translation router associated all machines your client connected to during download to your machine, so when they connect back to download stuff from you it correctly forwards those connections to your machine, but in the second case it’s just getting connections from unknown remote machines hitting one of its ports and in the absence of a “port-forwarding” static rule or a record of your machine having connected to those remote machines, it doesn’t know which of the machines behind it is the one that should receive those connection so nothing gets forwarded.

    So it’s perfectly possible to share back when behind a Mullvad VPN but you have to leave the torrent client keep on seeding immediatly after downloading and it will only ever upload to machines which were in the swarm when the client was downloading (they need not have been clients it downloaded from, merelly clients it connected to, for example to check their availability of blocks to download, which give how bittorrent works normally means pretty much the whole swarm)

    It is however not at all possible to just start seeding a torrent previously downloaded unless the download wasn’t that long ago (how long is “too long” depends on how long the NAT Translation Router of Mullvad keeps those recorded associations I mentioned above, since those things are temporary and get automatically cleaned if not used),



  • I do the same thing and I am not at all comfortable in saying I was wrong if I was, but I generally do it anyway because, well, fair is fair and I was indeed wrong plus it’s better than I discover it and will from there onwards be correct, that that I keep on spouting bullshit, so ultimatelly having been pointed out as wrong ended up as a win.

    That said, if the other person was an asshole in our discussion (for example, using personal attacks and insults) I won’t openly admit to them that I was wrong as I don’t want to give them the satisfaction (though I’ll internally accept I was wrong and correct my take from there onwards).



  • Only if you believe the racist idea that a nation, any nation, can represent everybody who is part of an ethnicity, i.e. and specifically in this case, that Mathematically the group “Jewish People” and the group “Israel and its supporters” are exactly the same group.

    If however the group “Israel and it’s supporters” is but a subset of the group “Jewish People”, then the actions of the subset of the larger group do not justify punishing the wider group, same as, say, the actions of the Ku-Klux-Klan do not justify punishing everbody who is deemed White or the actions of ISIS do not justify punishing everybody who is Muslim.

    I think the idea that the actions or victimization of some who are part of a broader group defined by nothing else than the ethnicity they were born into justifies a different treatment of everybody of the broader ethnic group, is THE most common racist trope there is, to the point that even liberals defend that shit (whilst, with zero irony or self awareness, calling it “positive”).



  • All those liberals going along with the idea that it’s possible to discriminate in a positive way only have themselves to blame when it turned out that their “positive” support of those they perceive as representatives of an ethnicity whom they (the liberals) view as “victims” as whole (i.e. all individuals of that ethnicity, rather than just the actual victims) was just racist prejudice and discrimination and stupidly easy to abuse to support ethnic cleansing (as long as those doing the murdering are from a “victim” race).

    Support for any kind of ethnic-wide assumptions about people and different standards of judgement and actions towards them based on their ethnicity, is the very same kind of view of one’s fellow human beings as the Nazis had, just with different “good” races and “bad” races.

    People should be judged on and treated based on what they support and what they do, not the ethnicity they were born into.


  • This kind of shit is a carbon copy of how the Nazis used claims of people being “against the Aryan race” to deflect criticism of the actions of the Nazis.

    I think this is religion being weaponized to support the extreme depravity of an ethno-Fascist ideology, rather than an inherent drive in that religion.

    In other words, the problem with Religions is not them having an inherent tendency for this kind of thing, is that they are extremely easy to capture and use to support even the most depraved behaviours, being capable of excusing actions well beyond what most other prepackaged belief systems are able to successfully excuse.

    In summary, I don’t think Religion is a driver of this kind of shit, I think it’s an enabler.