fullsquare

joined 1 year ago
[–] fullsquare@awful.systems 3 points 2 days ago

okay so they want to use layer of soil as a sort of seasonal storage. fine; this part works. 1. who's paying for all these residential heat pumps? 2. this kind of arrangement means a lot of digging and drilling. it takes one (1) nimby to stop it in its tracks and all these earthworks also cost money 3. at this point it's way simpler and cheaper to just use solar collectors to top up heat reservoir in the summer, as long as heat pumps are paid for. also these same solar collectors would just provide hot water in summer directly

were they advised by rube goldberg?

also, your local university probably has a kind of stability that makes years-decades long commitment worthwhile, unlike some sketchy bloated startup that probably dealt in crypto seven years ago

[–] fullsquare@awful.systems 6 points 2 days ago* (last edited 2 days ago) (3 children)

i heard that a couple of german dcs (owned by universities or other research institutions and therefore indirectly by state) do this, but this kinda depends on district heating grid existing and also puts some limits on thermal side, in simplest variant chips just have to run hotter. not to mention that it's kinda easier to do when you own the entire thing, long term, and can offload some of the engineering and design effort to some ~~intern~~ student writing masters or doctoral thesis. this works in part because when you switch from coal to gas and have district heating using that waste heat, there's less waste heat from CCGT of equal power, and it's all gone when you switch to renewables, so there's a grid that still needs some heat and dc boiler can fill that gap to a small degree. at the same time dc can't be the only source of heat because demand is seasonal and dc ideally should run 24/7 and while you can get enough storage for daily variation this won't be enough and some other source of heat is needed. this is why it makes more sense as a long term government backed project

[–] fullsquare@awful.systems 5 points 3 days ago

(he's in the business of dropping anvils from biplanes)

[–] fullsquare@awful.systems 3 points 4 days ago

also, has hungary built out renewables during orban tenure? that would help a fair bit in any scenario

[–] fullsquare@awful.systems 4 points 4 days ago* (last edited 4 days ago)

article says that hungarian dependence on russian oil went from sixty-ish% to almost 100% after 2022, and many countries started sourcing oil elsewhere, meaning they used to have other sources, but dropped them for some reason. this can be restarted

on top of druzhba, there is an oil pipeline called adria from croatian coast in omisalj that goes among other places to hungary. turkstream is for gas, but it's not the only source for the grid, and there are lng ports on the adriatic coast, and all these pipelines also go to groningen gas field and norwegian shore and other places https://www.entsog.eu/sites/default/files/2018-10/ENTSOG_CAP_MAY2015_A0FORMAT.pdf

[–] fullsquare@awful.systems 7 points 4 days ago

Yeah there are only so many ways to get it going, you don't hear about these that don't figure it out because cops bust them making them look like clowns and nobody wants to get associated with them afterwards

there is also a barrier between step 2 and 3, because sometimes news like that are suppressed. american school shootings get that treatment sometimes, not to mention all the info filtering at facebook and friends. this is why sympathetic media is an important bit to have in advance. there's also this bit where any serious insurgency needs money and it looks like what they got didn't work out

that southern police chief was per blogpost Laurie Pritchett and this kind of thinking is also what makes COIN tick. worry not, Hegseth declared it all woke nonsense

[–] fullsquare@awful.systems 2 points 4 days ago

hungary already imports 1.3GW on average

[–] fullsquare@awful.systems 4 points 4 days ago (2 children)

at minimum that 40% of non-russian oil supply to hungary didn't evaporate overnight, and there was supply from other places secured by other countries (norway will make a killing on this all)

[–] fullsquare@awful.systems 2 points 4 days ago

microwave datalinks might have beamwidths of perhaps fraction of degree, but it's still not much

[–] fullsquare@awful.systems 11 points 4 days ago* (last edited 4 days ago) (2 children)

eliezer misses that (as used in decolonization/civil rights era) nonviolence is effectively a sophisticated propaganda strategy that takes existing injustices and violence and uses it to bait opponent into attacking you, all while your own people take photos and show to entire world carefully crafted messaging that appeals to general public conscience. the messaging part is extremely important in this. there's no fucking way this could work for him because his cause is comprehensible only to those who already buy his cult messaging as ground truth. he's in just for the moral superiority of being nonviolent. he's never gonna get it because comprehending it requires touching grass

[–] fullsquare@awful.systems 12 points 5 days ago (2 children)

there is empirical series of materials sorted from which one is most likely to lose vs gain electrons, but what exactly happens is one of unsolved problems in physics

[–] fullsquare@awful.systems 5 points 6 days ago (1 children)

new and terrifying american weapon

 

I'm picking up an idea left by Dick KK4OBI, that you can lower impedance of dipole by arbitrary ratio if said dipole is zigzagged or otherwise uniformly contorted in some meandering shape. Side effect is that dipole becomes shorter and needs more wire. While there's data about impedance for fundamental, there's nothing about harmonics which is something that OCFD might be expected to handle well, so guessing that the really important part is aspect ratio of meander, i've made a couple of VHF-scale models with different meander aspect ratios (and many more much smaller sections), and some of data i've been able to collect roughly matches. The thing I'm trying to figure is what aspect ratio should be to cover multiple bands while using OCFD, say 40-20-15m bands, and whether impedances at different frequencies fall at the same rate. Eventually, when i figure this out, i'll try to make a full size 40m fundamental antenna, as I think that i've figured it out in mechanical terms

However during testing it turned out that I have severe common mode current problems, as two 10mm dia split ferrite beads were evidently not enough, so what little i've been able to collect is mostly useless. When I packed up everything I've found 4 Laird 28B beads that should together give 1100 ohms of impedance or so at 100MHz which also happens to be close to lowest frequency in my setup. Is this enough? Feedline is currently about as long as shorter arm of straight dipole at 22,5:77,5 split ratio, should I change it?

 

some communities are stuck in past, some 1d, some 1 month+. maybe it's because of old lemmy version (0.19.3 was released 22.01.2024). release notes for 0.19.4-0.19.10 don't suggest that these are breaking updates. 0.19.4 and 0.19.6 are big ones. 0.19.4 requires postgresql 16 and pictrs 0.5+ and it passed security audit. 0.19.6 recalculates something meaning that update takes longer. most of instances still on this version are down or badly broken, and these few that still are up seem to have the same problem

i guess it promotes touching grass, if that's your intention, fine,

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