Skip Navigation

User banner

fullsquare

@ fullsquare @awful.systems

Posts
1
Comments
332
Joined
1 yr. ago

  • Extinction Rebellion claims responsibility for chemical-filled balloon attack targeting Microsoft datacenter project

    Jump

  • you see, you can be as wrong as you want to be. i won't be teaching you middle school level chemistry against your will in a comment section. in concrete Ca2+ remains Ca2+, be it as hydroxide or carbonate or silicate and it cannot become reduced in normal concrete conditions and definitely it can't be oxidized.

    The Calcium Carbonate degrades into Calcium Oxide

    no it fucking doesn't, this is what happens when cement is prepared in a kiln. near surface of curing concrete calcium hydroxide captures carbon dioxide from air, then this crust of precipitate blocks it from moving deeper. which is why the rest of calcium hydroxide reacts with silica forming calcium silicate, which takes more time and is responsible for late strengthening. before you lost plot i was talking about oxidation of steel rebar, and it depends on many things, but for regular carbon steel if there's no oxygen then it's much slower. and because concrete is not very permeable to oxygen, there are all these engineering requirements about how deep rebar has to be. anyway, a little bit of vinegar would be just neutralized by calcium hydroxide from concrete and won't do anything, a little bit of salt would be diluted massively and also won't do anything, hydrogen peroxide would decompose because anything will do that

  • Extinction Rebellion claims responsibility for chemical-filled balloon attack targeting Microsoft datacenter project

    Jump

  • there are also more damage-susceptible things in a datacenter

  • Extinction Rebellion claims responsibility for chemical-filled balloon attack targeting Microsoft datacenter project

    Jump

  • calcium carbonate is still basic and even hydrogen carbonate is basic enough to be protective against steel corrosion

    The Calcium Carbonate once dissolved in water will start to form the Calcium Hydroxide layer on the surface, thats the alkaline layer, and deeper in the carbonation creates acidity.

    100% wrong, how come there's more carbon dioxide inside than outside, you're starting from calcium hydroxide and silicate. on the surface there's some carbonate formation from carbon dioxide, but when it can't get there calcium silicate forms instead. either way both are basic

  • Extinction Rebellion claims responsibility for chemical-filled balloon attack targeting Microsoft datacenter project

    Jump

  • coated rebar isn't, it'll always get dinged somewhere. stainless is expensive and the real available scalable option is either galvanized or sometimes basalt fiber, or glass fiber but i've not heard about it too much. the most important factor in slowing down corrosion is how thick concrete layer is on top of rebar, because concrete is very slightly porous and will let oxygen in, but the thicker that layer is, the slower oxygen gets to rebar, then the slower corrosion is, and this means it takes longer for rust layer to grow enough for concrete around rebar to fail due to swelling, because rust takes more volume than corroding steel

    a bit of vinegar might strip zinc layer, but won't do too much and definitely it won't matter long term until most of zinc layer is gone. salt also promotes corrosion but this also depends on oxygen availability and won't be too fast, it would only matter if there's salt in concrete in large amounts

  • Extinction Rebellion claims responsibility for chemical-filled balloon attack targeting Microsoft datacenter project

    Jump

  • these things can corrode rebar slightly

  • Extinction Rebellion claims responsibility for chemical-filled balloon attack targeting Microsoft datacenter project

    Jump

  • concrete is calcium carbonate and silicate, both are basic. it's also slightly porous but mostly waterproof by itself, doesn't matter that hard in this application since there will be AC removing water from the inside 24/7 anyway

  • do you guys have some music recommendations

    Jump

  • in no particular order and also roughly from that period: cosmosis, x-dream, astralasia, man with no name, astral projection, doof, amanite fx, manmademan, tim schuldt, mfg, blue planet corporation, hara gobi, chi-a.d.. perhaps shaolin wooden men

  • Locked

    Not a single one

    Jump

  • the man who decided to end german nuclear power production getting a seat in gazprom doesn't inspire confidence in reality-based discussion of this subject

  • Locked

    Not a single one

    Jump

  • they also last decades and are cheap to run with extremely low carbon emissions

  • Locked

    Not a single one

    Jump

  • most of costs are costs of construction. french and koreans don't seem discouraged and some plants in japan and china were built under budget. finland energy supply has large fraction of nuclear and they have extremely cheap electricity

  • Elon Musk’s Colossus 2 data center installed 59 natural gas turbines without permission, report claims — thousands of tons of pollutants reportedly impact black communities in Mississippi already suff

    Jump

  • it's more turbines, not sure if it's the same site or another

  • Friends claim influencer injected himself with gold to gain “superhuman” powers before his death

    Jump

  • your guess about what he actually did is as good as mine. gold salts are toxic and corrosive so it would be pretty obvious early on. small gold particles would occlude capillaries so that would be very obviois too. there is colloidal gold and gold nanoparticles are probably not very toxic. that discoloration could be some infection or irritation from whatever injected thing (not medical advice)

  • Deleted

    Permanently Deleted

    Jump

  • oops all Brassica

  • Germany opens world's largest power semiconductor fab in Dresden

    Jump

  • This will be good for renewables. Every solar inverter and wind turbine needs this stuff

  • Deleted

    Permanently Deleted

    Jump

  • Walls within walls

    Jump

  • This is why i always place all important info in Supplementary Information which is almost always free of charge. except on sciencedirect. fuck them

  • Removed

    “This Is Unfair” American A.I. companies say Chinese competitors are copying their A.I

    Jump

  • they need something like two trillions for entire business to make sense, doesn't mean that they'll get it. zitron says the entire sector is worth something in tens of billions in revenue (not profit) per year

  • Switzerland bolted 5,000 solar panels onto a dam wall 8,000 feet up in the freezing Alps. The plant now makes three times more winter power than any farm down in the valleys

    Jump

  • photovoltaic panels are just giant diodes you can run them in reverse and every panel gets that 0.6V voltage drop like any other silicon junction

  • Anthropic wants to develop its own drugs

    Jump

  • Yeah they'll make medbeds any day now. Or maybe it's for their internal use only, because they'll noticed bubble and don't like what they're seeing. I wonder if they're foolish enough to vacuum up all data from companies that used their chatbots to come up with something hoping that no one will notice

    Every single bit of that is so fucking stupid, they're replaying crypto playbook 1:1. Spot an industry that they think they'll manage in, then try to leech off of it in purest display of rentseeking imaginable, coupled with techbros folk belief that since programming is soo haard, then as they can do that they can do everything else too, all with no plan, no labs, no specialists onboard or faintiest idea what they're doing

  • Software engineers are facing an 'identity crisis bordering on depression,' Menlo Ventures partner says

    Jump

  • for the last three years and a bit, silicon valley has promised eradication of everything from writer to filmmaker as a career. after all this i don't think that devs get to hitch their wagon to artists for sympathy points