i’ve used the same (800ml can) and this one works well. cookie tin is 15cm dia 8cm tall and it works, but size can vary a bit. you can copy or scale slightly designs of 13cm band antennas
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wait i thought for some reason that pringles can sized waveguide would have cutoff frequency above 2.4ghz. nevermind, there’s something better because bigger aperture can get you more directivity like this https://lea.hamradio.si/~s53mv/wumca/cup.html i made two out of cookie tins and it works over 500m at least
pringles can is too small for 2.4ghz cantenna,it’s near cutoff frequency but just barely, you need 10cm-ish diameter can or shorter 16cm-ish can
fullsquare@awful.systemsto No Stupid Questions@lemmy.world•Why doesn't the Trump administration simply edit the Epstein files and release them?1·14 hours agoabout #1, not only this makes number of potential leakers higher (intentional or not - by opsec failures) but also this narrows down number of loyal, reliable people who also won’t fuck up the job real fast
fullsquare@awful.systemsto Science Memes@mander.xyz•you miss all the shots you don't takeEnglish2·5 days agoif someone is so bad at a subject that chatgpt offers actual help, then maybe that person shouldn’t write an article on that subject in the first place. the only language chatgpt speaks is bland nonconfrontational corporate sludge, i’m not sure how it helps
fullsquare@awful.systemsto Science Memes@mander.xyz•you miss all the shots you don't takeEnglish4·6 days agoin one of these preprints there were traces of prompt used for writing paper itself too
fullsquare@awful.systemsto Science Memes@mander.xyz•you miss all the shots you don't takeEnglish7·6 days agomaybe it’s to get through llm pre-screening and allow the paper to be seen by human eyeballs
nah, what happened is that they were non-psychotic before contact with chatbot and weren’t even usually considered at risk. chatbot trained on entire internet will also ingest all schizo content, the timecubes and dr bronner shampoo labels of the world. learned to respond in the same style, when a human starts talking conspirational nonsense it’ll throw more in while being useless sycophant all the way. some people trust these lying idiot boxes; net result is somebody caught in seamless infobubble containing only one person and increasing amounts of spiritualist, conspirational or whatever the person prefers content. this sounds awfully like qanon made for audience of one, and by now it’s known that the original was able to maul seemingly normal people pretty badly, except this time they can get there almost by an accident, getting hooked into qanon accidentally would be much harder.
No. Barrels of API (active pharmaceutical ingredient) are mostly hauled from India or China, then formulated into pills or whatever, this goes especially for generic medicines. There is some american manufacture of APIs, but these tend to be on more expensive side (biologicals or small molecule drugs under patent). Inputs for these APIs also tend to be made in India or China
fullsquare@awful.systemsto Ask Lemmy@lemmy.world•How many of you microwave water for tea?12·8 days agojapanese have 100v and don’t have this problem
fullsquare@awful.systemsto World News@lemmy.world•Moon mining is getting closer to reality: Why we need global rules for extracting space resourcesEnglish7·10 days agoIt’s not. He-3 is supposed to be maybe one day used in fusion power, but we’re talking about tons of this stuff. Not only scale is off, also He-3 burning requires much higher temperature than D-T fusion, and this is just around in next 20 years pinky promise
People who think that it’s a big deal also take Ray Kurzweil seriously, it’s scifi noise
In practical terms, when DHS wanted to get He-3 neutron sensors, they bought out entire global supply for multiple years, for an application where only grams are needed and it’s not used up. It’s made from decay of tritium currently and it’d be less energy intensive to make it the usual way
fullsquare@awful.systemsto Ask Lemmy@lemmy.world•Does a small amount of alcohol-drink help another polar substance taken sublingually help permeate more/good13·11 days agoyou shouldn’t mix alcohol and zopiclone mate you’re gonna die from this
fullsquare@awful.systemsto World News@lemmy.world•Europe Puts Social Programs on Chopping Block to Appease Trump on NATO FundingEnglish3·12 days agoat minimum brits have source code. couple of eu countries make parts for it as well
fullsquare@awful.systemsto World News@lemmy.world•Europe Puts Social Programs on Chopping Block to Appease Trump on NATO FundingEnglish81·12 days agothere’s a couple of big failures in american defense industry (like shipbuilding) but F35 is not one of them. the alleged killswitch is not likely a thing because first, it could be used by the most probable adversary, and they already shown capability in EW; and second, it’s not necessary because it requires constant stream of spare parts and maintenance. as if it’s worth it, ask any remaining iranian radar operator for firsthand opinion
some countries switched to euro made jets anyway, but these aren’t likely to be doing the job that F35 is cut to do anyway (SEAD)
there’s already euro alternative in development, for which americans were explicitly not invited (GCAP, FCAS). there’s also the everything else part of military, half of euro countries make now artillery (both tube and rocket) so these can be bought locally too
fullsquare@awful.systemsto World News@lemmy.world•Europe Puts Social Programs on Chopping Block to Appease Trump on NATO FundingEnglish371·12 days agoit’s not listed because this is not what is happening
italy for example put bridge construction in that military budget (as critical infrastructure)
also the subtext was “spend that defense budget in america” and this is not happening either for variety of reasons, so it’s partial failure already for them
fullsquare@awful.systemsto TechTakes@awful.systems•Microsoft lays off the staff who make the money to fund AI that doesn’tEnglish10·12 days agobut does the prospect of mass human sacrifice please The Line?
this is about exactly what you can expect from a man whose approach to science is take a phenomenon -> think about it really, really hard -> just know how it works and have an answer (without checking if it’s correct or not, he already thinks he figured it out and won’t change opinion ever even in the face of contrary evidence)
fullsquare@awful.systemsto Science Memes@mander.xyz•EVERYBODY IS DOING SOMETHINGEnglish12·12 days agothat ai cult also doubles as a get smart quick scheme
fullsquare@awful.systemsto Science Memes@mander.xyz•EVERYBODY IS DOING SOMETHINGEnglish10·12 days agoyou’re right, he couldn’t be high school dropout because he never attended high school. he went to normal schools before that allegedly, but 8th grade broke him
helical antennas work fine too and look goofy as hell