kqbx

5 ms·

1.
by kqbx 1y ago
The second link is broken on HN because it contains a space. Here's a clickable version: https://vision.unipv.it/IA2/Factor%20graphs%20and%20the%20su...
2.
by kqbx 1y ago
I clicked through at least 20 different repositories expecting lots of MATLAB code, but to my surprise, I didn't find a single .m file. I hate how MATLAB is so popular in the DSP world and it makes me happy to see that the astronomy co
3.
Jonathan's Space Report(planet4589.org)
20 points by kqbx 1y ago|0 comments
4.
by kqbx 1y ago
here are some of my best finds: - https://maximecb.github.io/Turing-Drawings/#4,3,1,2,3,3,1,0,... - https://maximecb.github.io/Turing-Drawings/#6,3,2,1,0,4,1,1,... - https://maximecb.gi
5.
by kqbx 2y ago
Thank you for the clarification. Recently I've been reading a lot about tracking of space objects (though much closer ones, on LEO/MEO), so this is some very interesting stuff for me!
6.
by kqbx 2y ago
The article is light on details, but we can make some guesses based on the label "10s integrations, 1Hz channels" in the plot. I assume they have a bank of 1Hz filters, and they split the output of each filter into 10s intervals,
7.
by kqbx 2y ago
GPS navigation messages do include information about leap seconds and other stuff necessary to convert between GPS time and UTC. See GPS Interface Specification IS-GPS-200, 30.3.3.6.2 - UTC and GPS Time
8.
by kqbx 2y ago
Can confirm, it's a great way to get started with radio stuff. Since I live in Europe, I did this with the German DCF77 signal. The frequency is low enough that you can do direct sampling with a 192ksps sound card or with an RP2040. A
9.
by kqbx 2y ago
Reportedly, ADSL can work even if there is a short (~5mm) gap in one of the conductors (because of capacitive coupling). source: Someone said this on reddit so it must be true https://www.reddit.com/r/networking/co
10.
by kqbx 2y ago
For this purpose, how does TinySA compare to scanning the spectrum with an RLT-SDR (or other low-end SDR)?
11.
by kqbx 2y ago
Dave from EEVblog made a nice series of interviews about this station: https://www.youtube.com/watch?v=586Zn1ct-QA
12.
by kqbx 3y ago
I wanted to build something like this but for Linux, especially the vimium-like hints that would work in any app. I even made a prototype by abusing the AT-SPI2 accessibility API. Unfortunately, querying AT-SPI2 for all buttons takes too lo
13.
by kqbx 3y ago
Reminds me of a problem that I had (many years ago) with my iPhone 4 - if I tried to boot it in a dark place, it would get stuck on the Apple logo in an infinite boot loop. Turns out some versions of the Pangu jailbreak for iOS 7.1.x would
14.
by kqbx 3y ago
undo-tree for emacs can do this. I think spacemacs enables this by default https://stackoverflow.com/questions/2985050/is-there-any-way... It really saves the whole tree, not just the path that was active at the t
15.
by kqbx 4y ago
In neovim, :X (and cryptography in general) is removed https://github.com/neovim/neovim/commit/85338fe
16.
by kqbx 4y ago
Sounds like you're describing a three-pass protocol: https://en.wikipedia.org/wiki/Three-pass_protocol Note that this requires the encryption to be commutative - in the third step Alice has a message in the form e
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Malament–Hogarth Spacetime(en.wikipedia.org)
2 points by kqbx 4y ago|0 comments
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DSP Illustrations(dspillustrations.com)
2 points by kqbx 4y ago|0 comments
19.
by kqbx 4y ago
Thank you, I totally forgot how nix-shell works. You're right, it should export the right env variables without makeWrapper. I haven't used nixos in a while and I got confused about this because to install python packages globall
20.
by kqbx 4y ago
> PYTHONPATH, CPATH, etc are all set up and ready to go. Does that mean that Guix just exports the required environment variables in the shell rather than wrapping each executable with a bash script [1] like nix does? If yes, that's
21.
by kqbx 4y ago
I really like Wikipedia's illustrated explanation of Noether's theorem [1]. Euler-Lagrange equations can also be proved using a similar trick - make an infinitesimal smooth 'bump' in a realizable path and consider the ch
22.
by kqbx 4y ago
Although I don't (yet) own a real FPGA, I recently started to learn Verilog and wanted to see if I could program one using only open-source tools. My first impression is that the tooling is too fragmented and the documentation is lacki
23.
by kqbx 5y ago
The blog where the chart was originally posted has a slightly bigger version of the picture: https://www.leagueoflostcauses.com/blog/2013/08/astronomy-10...
24.
by kqbx 5y ago
I'm a big fan of https://qalculate.github.io/ . It has a nice GUI which can be used interchangeably with the CLI version. It also has units, many built-in physical constants, currency conversion, matrices and probably t
25.
by kqbx 8y ago
I haven't been able to find the original files (probably not possible) but it looks like The Guardian has access to at least some of them too: https://www.theguardian.com/news/series/facebook-files Note that