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

have you calibrated your nanovna? you have to do that after every change of frequency range. you need S11 smith chart, not S21 smith chart (port 2 is not connected). swr and logmag get you the same info in different formats, pick 1

1m away from metal things should be okayish but the more the better. these lights will interfere, if you could at least move them away from the corner it would be an improvement. twin lead cannot be close to metal either (is that sheet metal near bottom of antenna?) needs at least couple cm of distance from it. i would also replace that nail with a ziptie

strictly speaking that’s a slim jim. why does it have a twist in the middle? untwist it, the radiating part (upper approx 1m) should be a smooth transmission line for it to work right (or shorted at both ends)

If you want to preserve the way it’s made, you’d need to resolder the top bar after adjustment. But you also can leave wires on top unconnected

there are also more damage-susceptible things in a datacenter

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

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

there’s been a wave of spam posts on writefreely couple of days back not sure if there’s a relation

these things can corrode rebar slightly

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

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

Hey, gotta pump up these self-citation numbers somehow

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

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

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

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

Terrorist adoption of AI has thus advanced further and more systematically than prior analysis has recognized

salafi extremists that declared western education sinful are now world-leading AI-first village-burning-as-a-service jihadist startup. okay whatever

It has aided in attack planning, weapons troubleshooting, and the design of explosive devices, as users have successfully circumvented some safeguards.

surely their contacts within ISIS or any number of other islamic militias couldn’t have taught them that previously, no they have to rely on movie plot ideas from chatbots. it probably helps that some people heard about them but peak years of their activity were in 2014-20 before ISWAP eaten their support base whole by not raiding villages and trying to replace state instead

also, when trying to make sure that i got this right i’ve learned that apparently al-qaeda pivoted to app development

it’s not even known yet and they say so:

The primary endpoint was progression free survival (PFS) assessed by BICR per RECIST 1.1. Secondary endpoints included overall survival (OS), objective response rate (ORR), duration of response (DoR), and safety profile. (…) The OS data were immature.

it was also only for late stage metastatic patients with a very specific mutation. now, since AZ has the rights, and they have money for trials, they can try to get a trial for earlier stages, and so this new better drug might be used for larger patient population while still patented. and that would be money printer

there are drug trials that cost more money than that. also this is not +4 months comparison new drug vs nothing this is new drug vs old drug. if AZ also got their IP then it’s a fire sale

here is study: https://ascopubs.org/doi/10.1200/JCO.2026.44.17_suppl.LBA8500

i thought that pause ai was just rationalist controlled opposition

i’m looking at electricitymap rn, sicily is 79% renewable with 65% solar, other regions at least 50% renewable too, on country level 35% solar and 54% renewable (+ 7% nuclear (french)). this not that far away from spain (51% solar 60% renewables + 15% nuclear). it’s not bad, you’ve got a bunch of solar and wind farms. in poland there was for many years very restrictive law on wind farm distances from populated areas, it got better but buildout is not as large as it could have been and so reliance on coal is still there. no such restrictions on solar

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)