Viewing profile — kqbx

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...

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 w…

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://maxime…

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 …

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 sp…

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.…

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 s…

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 http…

For this purpose, how does TinySA compare to scanning the spectrum with an RLT-SDR (or other low-end SDR)?

Dave from EEVblog made a nice series of interviews about this station: https://www.youtube.com/watch?v=586Zn1ct-QA

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. …

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 o…

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 …

In neovim, :X (and cryptography in general) is removed https://github.com/neovim/neovim/commit/85338fe

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 …

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 abou…

> 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 …

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' …

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 t…

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...

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, curre…

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/seri…