Is your cucumber bitter? Throw it away. Are there briars in your path? Turn aside. That is enough. Do not go on and say “Why were things of this sort ever brought into this world?”

moving to https://discuss.tchncs.de/u/skillissuer

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Joined 1 year ago
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Cake day: June 12th, 2023

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  • one thing i haven’t seen mentioned in the article: when antennas and propagation of radio waves are involved, it’s often useful to think of waves and things they encounter in terms of wavelengths. at 2.4 ghz (12cm), your wall might be 1 or 2 wavelengths, and this might be enough to slow down your wifi. at 5ghz, it might be 5 to 7, and signal degradation will be much worse. at visible light, even sheet of paper is hundreds of wavelengths thick. unless it’s translucent, no signal will come through. conversely, VHF or HF has much longer wavelengths, allowing much longer range and penetration through things like walls.

    another important thing is that most of designs of antennas, filters, amplifiers and such components of transmitters and receivers usually operate on some narrow band, several % off carrier frequency. if you want to make that band larger, it usually means that your components have to be larger in terms of wavelengths. because in microwave region wavelengths are shorter, this means large bandwidths in manageably small devices. this works even better for light







  • something similar happened to me lately (on linux mint): i’ve somehow lost xorg and cinnamon due to botched wine install or maybe uninstall. what worked for me: i was able to install them again without gui, reboot (this time getting gui back) then run timeshift (that worked somehow) to restore to yesterday’s backup. note: you will be probably able to access your files in cli, and if in doubt back them up, then if all else fails you can spin up new install of your distro. it’s most likely recoverable but it will take an evening in the worst case

    since then i’m making full backups every month