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sga

@ sga @piefed.social

Posts
41
Comments
401
Joined
12 mo. ago

  • Mass Download course PDFs ?

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  • for cookies, you can try to open devtools, and then go to network tab, and there find the pdf file, and then right click, and you will find an option something in lines of 'copy as/for cURL', copy that, and paste somewhere. repeat exercise for some other file. this should give you some pattern as for how to make a query. it most likely just needs a bearerauth/token in header cookie, or something alike that.

  • Mass Download course PDFs ?

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  • in this case try to fetch a list and then fetch your cookies from browser, and use curl and scripting to fetch stuff.

  • 720p x264 vs 1080p x265

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  • try to see if 1080p av1 can get you some more saving? also just resolution and codec is not enough - we need to know bitrate. just for a frozen frame or some regular slow talking style scene, low bitrate is fine, but if you have action or high pace, a low bitrate 4k would look worse than high bitrate 480p or something. I am storage poor, so I do 480p mostly at reasonable bitrates. I can do 720 p at a bit lower bitrate, but action and stuff struggle.

  • Mass Download course PDFs ?

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  • try something in lines of 

       
        
wget -r -np -k -p "website to archive recursive download"

    may work, but in case it does not, i would download the the page html, and then filter out all pdf links (some regex or grep magic), and then just give that list to wget or some other file downloader.

    if you can give the url, we can get a bit more specific.

  • Hurts every time.

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  • It was my server before joining piefed. o7 in chat. love and respect to ridoku for running the server.

  • OnePiece @lemmy.world
    sga @piefed.social
    ch 1175

    Chapter 1175: Nidhogg

    tcbonepiecechapters.com /chapters/7963/one-piece-chapter-1175

  • A century of hair clippings show lead exposure rates [in the US] have plummeted

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  • sorry to disturb your business kind sir

  • Researchers prove that atomic vibrations can transfer orbital angular momentum directly to electrons in a non-magnetic material

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  • Researchers prove that atomic vibrations can transfer orbital angular momentum directly to electrons in a non-magnetic material

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  • not my domain, so i looked the title online (the original article is in nature, and not open access, and currently not in uni, so can not access through uni wifi)

    here is a theoretical version establishing physics for this effect - https://arxiv.org/pdf/2505.23083v1

    I am also not reading the linked article, as it is too flowery for me.

    so here is a tl;dr - if you know seebeck effect, this should be somewhat easy. seebeck effect is a effect where if there is a temperature gradient in a material, electricity can be generated. i will not go on about why that happens, but as a statistical argument, just keep in mind that as things are heated, they jiggle (very specific physics term, definitely not me stupidifying oscillations). if it is a "bond" between two atoms (aptly named atomic bonds), we consider a quantisation (fancy way to put number to how strong the vibration is, there is more to it, but not for now) of these oscillations as phonons. another thing is that in materials, these bond are often arranged in some special manners. for most materials, these arrangements are periodic lattices, (think junglee gym bars or rubik cube or some other periodic arrangement). in these materials, phonons can often transfer in different modes, always trapped by the ends. in some materials, these bonds can form helices, where phonons instead of going in straight line, will travel across the helix. if you know what angular momentum is then great, if not, think something with some "speed" going in circles. in that case it will have some angular momentum along the axis of that circle. coming back to main topic, here we have some phonon going across helix, having some angular momentum. now essentially this motion of phonon can create spin current. this requires us to go into separate tangent, abou what spin is, which is well hard to explain. in most materials, there are 2 types of electrons, and we just name these 2 spins up and down (and it has practically nothing to do with up or down directions). as to why there are only 2, is a really big topic we are not going into. but roughly, it is because of nature of material. in non magnetic materials, they behave same, but in magnetic materials, they do not. in some other words, you can say magnetic materials are magnetic because these 2 spins behave differently in these materials. in normal current, we have electrons going from 1 direction to another (kinda, but that is tangent to tangent, not going there). in spin current, these 2 electrons flow in opposite directions. since both are electrons, there is no charge difference created, a spin potential is created. this tudy showed that in non magnetic materials (tungsten and titanium), you could generate spin currents by "injecting" a angular momentum from quartz crystal phonon. if yo have ever heard of angular momentum conservation, this is a consequence of that, as spin current is a kind of angular momentum.

    as to why this could be special, spintronics (the name for using electron spin instead of charge for generating currents and making devices) requires lower power than electronics. one of the problems was that you required special magnetic materials, this is a demonstration without magnetic materials.

    in my physics world, this is big (in a scale of 1 to 10, 10 being theory of everything done, 1 being boring desk work - this is 5-7 - very big in spintronics, and reasonably big electronics), but to someone outside -not that big, like for decade(s). we made first transistors in 50s and 60s, an reasnable electronic devices (the semiconductor chips) by 70s and 80s. we made first spin transistors in 00-10s so i guess another 10 or so years before we see some industry level production.

  • Removed

    Ex-South Korean president found guilty of insurrection over martial law order

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  • i partially agree. i would request you to check back to discussion in the pinned post where we decided to ban schadenfreude. there were lots of bad things happening to bad people, or stopping bad things from happening, and community decided to stop that.

  • The world just got brigther!

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  • that post was made after there were many posts either dunking piefed or lemmy, and us mods were drowning, so locked those posts, and then i asked other mods if we should add the rule to prevent thaat, and they agreed

  • Removed

    Ex-South Korean president found guilty of insurrection over martial law order

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  • this would fall in schadenfreude. asking other mods for their decisions. i know the situationm and it was great that he was removed, but him being found guilty is now a bad thing happening to bad person. it is not hateful, so i am contemplating.

  • vibes based astronomy

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  • sorry to break it to you chief, but in reality, neptune is not darker blue, i learnt it recently, but the darker color comes from some magazine print which got very popularised. from the images, the look basically same.

  • Open-Source P2P Apps

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  • session is basiclly federated (the same model as email and fediverse), where there are different nodes for session. and unlike mail fediverse federation, (if i am not wrong) they have balanced nodes, so basically traffic is spread rather uniformly. as for motivation for starting a node, there are not many, nodes basically form a block chain of sorts and also have something like tor (called lokinet) which also makes your comms hidden.

    i personally never got into session, because it seemed like too hard and complex (i do not like using complex software. even if i do not read to run server nodes for it, i should atleast know how it works to understand my safety model). and unlike signal (session started as a hard fork of signal afaik), they broke pfs (perfect forward secrecy - basically something magically, which makes it so that if some bad actor broke encryption for one of your messages, they can not do that for next message)

  • Independent News - an idea for aggregating independent journalism

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  • the thing is that i am currently working and get not much free time, and maintaining and filling comms is hard. will wait for some time unti i am unemployed again

  • Independent News - an idea for aggregating independent journalism

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  • over here, basically all media houses (those who do tv) are basically paid indirectly by ruling party (we basically have a olligarcy mixed with populist fascism) so anyone raising questions against ruling party immediately is seen as better. If they are unaffiliated with opposition parties, then that is independent enough for me - basically do not take funding from parties or huge corporations, small corporates or businesses are fine as long as there is no major influence on content (they should not have editorial say on anything basically).

    we do not have lobbying as a thing, and any politician taking money from any individual for any reason could be classifieed as wrong doing (that certainly does not stop quid pro quo, they just have to be creative in giving money)

  • Discussion: What are some lesser known independent news publications?

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  • i personally do not often read reporters names unless they are publishing on their own pages, though i have some saved pieces of works i have liked and will try to find a list of their names

  • Open-Source P2P Apps

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  • well briar does not have calling on desktop (in stable yet at least), also jami can do video and screen share, and session is not p2p. what most p2p chats lack is users.

  • Discussion: What are some lesser known independent news publications?

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  • https://www.reporters-collective.in/

    https://scroll.in/ (i mostly follow this because they provide rss feed, about 20-30 articles a day, but many are pulled from other sources)

    also i follow bbc india (i do not think they fit any indie space)

    in india, many new independent reporters went for the social platforms (serious ones to youtube, not serious ones to instagram), so one has to follow them basically reporter by reporter basis

  • Independent News - an idea for aggregating independent journalism

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  • i personally only majorly read english only, so would do that. my main source would be folks like scroll.in or bbc india, or reporters collective. if you want to check their work, to see if they fit, you definitely should. Also there are many youtube channels who do ground reporting independent of big media houses (news pinch comes to mind, but many more), so may also share that.

    Occasionally I add explanations for words/terms North Americans may not understand, but that’s not necessary.

    would do that, but i may not know exactly what terms should i add, so may wait for some comments to point out some specific words, otherwise, i can also do a brief post explaining what happens in india and some themes to know, but that would involve a lot work, so i would leave that to a future me (future me hates present me)

  • Favorite Snack or Treat

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  • just plain for me. if they are salted, beyond a certain point i just start having a dry salty mouth and have to stop. must not stop eating cashews.

    they can be either dry roasted, or roasted in some oil, but then again changes textures for me. just raw is my favorite

  • OnePiece @lemmy.world
    sga @piefed.social

    Chapter 1174: "The Strongest In The World" (by TCB Scans)

    cubari.moe /read/imgchest/dl7p5p9lpyo/1/1/
  • Videos @lemmy.world
    sga @piefed.social

    I built my own modular Couch... bc that's a thing you can just do ig

  • Uplifting News @lemmy.world
    sga @piefed.social

    Banning lead in gas worked. The proof is in our hair

    attheu.utah.edu /health-medicine/banning-lead-in-gas-worked-the-proof-is-in-our-hair/
  • OnePiece @lemmy.world
    sga @piefed.social
    ch 1172

    Chapter 1172: THE ELBAF I ADMIRE

    cubari.moe /read/imgchest/lqyeng5nxyd/1/1/
  • Math Memes @lemmy.blahaj.zone
    sga @piefed.social

    (sorry for not a meme) Euler's unsolvable conjecture

  • Science @mander.xyz
    sga @piefed.social

    Footprint tracker identifies tiny mammals with up to 96% accuracy

    phys.org /news/2026-01-footprint-tracker-tiny-mammals-accuracy.html
  • Linux @programming.dev
    sga @piefed.social

    Apparently, Fedora Asahi Remix is now working on Apple M3

    bsky.app /profile/did:plc:okydh7e54e2nok65kjxdklvd/post/3mdd55paffk2o
  • memes @lemmy.world
    sga @piefed.social

    Certainly you can not make one, definitely not within 5 minutes

  • Videos @lemmy.world
    sga @piefed.social
    00:25:07

    Perfectly Replicating Coca Cola

  • Science @mander.xyz
    sga @piefed.social

    A room full of flu patients and no one got sick

    www.sciencedaily.com /releases/2026/01/260110211204.htm
  • OnePiece @lemmy.world
    sga @piefed.social
    ch 1170

    Chapter 1170: Contradiction

    tcbonepiecechapters.com /chapters/7929/one-piece-chapter-1170
  • Uplifting News @lemmy.world
    sga @piefed.social

    Frog gut bacterium eliminates cancer tumors in mice with a single dose

    newatlas.com /cancer/frog-reptile-microbes-cancer/
  • OnePiece @lemmy.world
    sga @piefed.social
    theory

    [oc] elbaf's legendary fruit maybe is the fruit of forest god (one of the 4 gods)

  • OnePiece @lemmy.world
    sga @piefed.social
    ch 1169

    Chapter 1169: "I Need To Die As Soon As Possible"

    cubari.moe /read/imgchest/md7oba3wa4p/1/1/
  • OnePiece @lemmy.world
    sga @piefed.social

    One Piece Chapter 1168 | TCB Scans

    tcbonepiecechapters.com /chapters/7923/one-piece-chapter-1168
  • OnePiece @lemmy.world
    sga @piefed.social
    spoilers

    [ch 1168] spoliers for ch 1168

  • Linux @programming.dev
    sga @piefed.social

    Building the perfect linux pc with Linus Torvalds - YouTube

  • Casual Conversation @piefed.social
    sga @piefed.social

    I am happy to see this community is active!

  • OnePiece @lemmy.world
    sga @piefed.social
    spoilers

    [ch 1166] chapter 1166 summary and transcript