*whispers*
More Fedi communities for scientists about #science:
• https://lugnasad.eu - for French speaking science lovers
• https://realscience.social - for naturalists and those who appreciate evidence based science
• https://scicomm.xyz - for scientists and science enthusiasts
• https://scholar.social - for researchers, journal editors, librarians, anyone involved in academia
@rf кто там интересовался токаркой по дереву? Вот мастер-класс от прошаренного дедка.
Why the Fediverse is significant, beside privacy
Because big corporations are not forever.
Say about them what you will, but there IS a value in social media, they do satisfy the need, they do scratch that ancient itch of human beings to hear each other and be heard. They do it quite perversely, as a side-effect to filling their shareholders' pockets, but still, as a matter of fact.
The corporations though, do close down for all kinds of reasons.
There was a time before Twitter. Someday Facebook will disappear. Someday, YouTube will go dark.
The Fediverse, in this sense, is a toolkit, that will allow people to rebuild the Internet as we know and love it today in the future, when most companies have gone extinct.
The Internet is not a thing that "just is", it's "what people do". The Fediverse recognizes and embraces this fluid, dynamic nature: every now and then there's new servers that pop up and old that ones go down. It's not really a big deal around here. And it's... beautiful?
Physical quantities commonly have an integer dimensions. When I say integer, I mean they expressed in base dimensions (\(L, M, T, I, \Theta, N, J\)), raised to the integer powers: volume is \(L^3\), acceleration is \(LT^{-2}\) and so on. Of course, choice of basic dimensions is somewhat subjective, so one can choose volume instead of length, so length will have noninteger dimension of \(V^{\frac13}\). But the common observation is that the standard ones are sort of "atoms" which are never divided.
However, non-integer physical dimensions exist. First one is actually a whole class---spectral density of voltage V/√Hz, current A/√Hz and so on. All them have \(T^{\frac12}\) in their dimension. Another one is Hildebrand solubility parameter with dimension of \(M^{\frac12}L^{-\frac12}T^{-1}\) and measured in √Pa.
While it was hard to find these above, I wonder... Do there exist any more? Can fractions other than \(\frac12\) or even irrational physical dimensions exist?
@sptnkmmnt@mastodon.ml @rf Думаю, что линукс (тут обычно понимают весь FLOSS, а не конкрено ядро) никому ничего не должен и эти споры яйца выеденного не стоят. Его модель существования доказала свою жизнеспособность (не популярность, эффективность или что-то там ещё, а именно жизнеспособность), а если её кто-то решит подогнать под своё «самое правильное» видение — будет только хуже.
Hi everyone, I'm off the grind, and that also means I'm off the dole. I'm running out of money, and I'm looking for a job.
If anyone needs a sysadmin with 6 years of professional and 18 years of hobbyist experience, please send me a DM.
My toolset includes (but is not limited to) the following:
- Nginx
- Caddy
- PHP-FPM
- MySQL / MariaDB
- QEMU / KVM
- Proxmox VE
- OpenVPN
- BIND (named)
- PowerDNS
- Postfix
- Exim4
- Dovecot
- 3proxy
- HAproxy
- Quagga/Bird (limited, but still)
- Apache
- ejabberd
- Nagios (nrpe, nsca)
- IPtables
- Logrotate
- systemd
- Nextcloud
-
I'm open to learning new stuff.
Please repost if nothing else!
ATLC (http://atlc.sourceforge.net/) appears to be good #opensource tool to design unusual PCB (micro)strip lines. But slow. P.s. Images of simulated 100 Ω edge coupled embedded #microstrip included.
This is named Logarithmic Number System (LNS). Even Wikipedia have an article on in. Fun fact, it is invented at least three times (excluding toot above). Obvious idea, isn't it?
Suddenly found, that fixed point logarithm could be an alternative to floating point. Multiplication and division are just addition and subtraction of logarithms. Addition and subtraction are not that easy, but \[\log\left(\exp a \pm \exp b\right) = a + f\left(b - a\right)\], where \[f(x) = \log\left(1 \pm \exp x\right)\] could be implemented as a lookup table (one for addition an one for subtraction). Of course, zero and negative values should be treated specially, but this is true for floating point too. (For negative values negative base logarithm should do the trick, if it is ok to have inexact negation). #floatingpoint #weirdcomputing
P.s.Edited toot due to error in math
#мысли_вслух
Чтобы встроить чипы, нужно потратить средства на его разработку, внедрение, поддержание инфраструктуры обслуживания и бороться с противодействием таких маргиналов, как мы. А тут всё сделано за счёт «клиента», и ещё сами «клиенты» будут яростно отстаивать право везде таскать жучок и, что совсем весело, морально давить на тех, кто захочет отказаться.
In 1997 QNX released the QNX Demo Disk - a floppy that featured the QNX 4 OS, GUI, PPP or networking, web browser, file browser, and several demo applications... all in a single 1.44MB diskette.
I was really impressed by the thing at the time. Both it and the demoscene drove home that software didn't have to be as big as it was starting to get.
🎞️ Demo video: https://www.youtube.com/watch?v=K_VlI6IBEJ0
💾 Demo Disk image files: http://toastytech.com/guis/qnxdemo.html
Hacking the demo disk: https://openqnx.com/node/259
📚 Original website: https://web.archive.org/web/19970710162704/http://www.qnx.com/iat/index.html
Plastic
Humanity: Okay, so we have this new synthetic material that is: non-degradable, can be made very resilient, can be made into any shape or form, good at insulating both heat and electricity, its physical properties can be widely manipulated, it can be flexible and hard both at the same time, and, best of all, it's dirt-cheap!
Me: Wow. That's like a dream material, straight up space age stuff! What are you using it for?
Humanity: Disposable food packaging, mostly.
Me: Are you fucking kidding me?
17 декабря 2019 г. РКН навечно заблокировал LostFilm.TV
Поприветствуем его в #Yggdrasil
http://[300:ed66:f059:48d2::2]/
Петер Фрейхен, человек — белый медведь
Physicist. Electronics engineer.
My native language is Russian. I also speak English and learn Japanese.
I play go (baiduk, weiqi) sometimes.
I use GPG for communication. Here's one of my keys.
http://keys.gnupg.net/pks/lookup?op=get&search=0x7DFB28AF9D7FC805 (Fingerprint: 7F54 6214 03B7 6C00 8365 7F3E 7DFB 28AF 9D7F C805)
Other fediverse accounts:
@vovanium — active Friendica
@vovanium — some crap. mainly inactive