Upspin sounds interesting.
There are other interesting articles, for example
https://commandcenter.blogspot.com/2019/01/notes-from-1984-trip-to-xerox-parc.html
https://commandcenter.blogspot.com/2018/02/cerns-ipod-like-control-devices-from.html
Ironically, I found this via
https://ambrevar.xyz/links/index.html
where both Kernighan and Ritchie's book "The C programming language" and Kernighan and Pike's "The Unix programming environment" are classified as "Unix books you’d rather not read".

Galileo/GPS/BeiDou/Glonass open source monitor.
Found via https://hackaday.com/2019/09/24/tracking-the-satellites-that-keep-us-on-track-monitoring-gps-galileo-beidou-and-glonass/
The source code can be found on https://github.com/berthubert/galmon

See also the articles https://berthub.eu/articles/posts/galmon-project/ and https://berthub.eu/articles/posts/improved-galileo-fix-time/
Read https://berthub.eu/articles/posts/galileos-eccentric-satellites/, all formulas are approximations.

Explanation of HTTP Strict Transport Security.

Noise is a framework for crypto protocols based on Diffie-Hellman key agreement. Noise can describe protocols that consist of a single message as well as interactive protocols.
Used in WireGuard https://www.wireguard.com/

Instead of
"The CDTA is not free from parasitic input capacitances and it can operate in a wide frequency range due to current-mode operation."
something like "the CDTA is less sensitive to  parasitic input capacitances..."
is more appropriate.

Recently "Lama Bleu" has been working on a custom firmware image for the PlutoSDR. Installing custom firmware allows you to load up a pre-configured Linux system which already has a bunch of useful software installed. He writes that his version is not designed to have a nice GUI, but rather focuses on scripting and data acquisition software.

See Hack (and other monospaced fonts) live in action!
Install your fonts locally and they will show up in the dropdown selections.
Use the dropdown options to modify the typeface, text size, language, and highlighter scheme.

gopass is a rewrite of the pass password manager http://www.passwordstore.org in Go with the aim of making it cross-platform and adding additional features. Our target audience are professional developers and sysadmins (and especially teams of those) who are well versed with a command line interface. One explicit goal for this project is to make it more approachable to non-technical users. We go by the UNIX philosophy and try to do one thing and do it well, providing a stellar user experience and a sane, simple interface.
https://www.gopass.pw

Collection of programs to run on the PlutoSDR, including the dunp1090 SSR ADS-B receiver, SoapyRemote and OpenWebRX. Can be programmed as image or the programs can be copied onto the PlutoSDR and ran from there.
See also http://www.rfoverride.com/plutoweb/

Note that shaarli could add this link on Chromium 68/Ubuntu 16.04.

Apart from the blog, there are technical notes https://www.johndcook.com/blog/writing/ and on-line calculators https://www.johndcook.com/blog/online-calculators/
As an example, see Camp-Paulson normal approximation to the binomial distribution https://www.johndcook.com/blog/camp_paulson/
The articles https://www.johndcook.com/blog/2024/04/01/more-laguerre-images/ and
https://www.johndcook.com/blog/2024/03/22/laguerres-root-finding-method/ demonstrate the basins of attraction for Laguerre's root-finding method.
https://www.johndcook.com/blog/2018/11/24/spheroid-distance/ should be useful for azel.
https://www.johndcook.com/blog/2020/02/08/arenstorf-orbit/ shows a periodic solution to the restricted 3-body problem.
https://www.johndcook.com/blog/2022/11/14/simultaneous-root-finding/ describes the Durand-Kerner polynomial root finding method.
https://www.johndcook.com/blog/2022/11/01/kepler-newton/ discusses solving Kepler's equation

TODO: https://www.johndcook.com/blog/2022/10/30/arctan-k-tan-t/ states "This plot looks similar to the plot of true anomaly for a highly elliptical orbit. I’m sure they’re related, but I haven’t worked out exactly how."

https://www.johndcook.com/blog/2022/10/21/math-origins/ explains V.I. Arnolds comment
"All mathematics is divided into three parts: cryptography (paid for by CIA, KGB and the like), hydrodynamics (supported by manufacturers of atomic submarines), and celestial mechanics (financed by military and other institutions dealing with missiles, such as NASA)."

https://www.johndcook.com/blog/2018/09/24/riemann-hypothesis-the-fine-structure-constant-and-the-todd-function/ is about  Sir Michael Atiyah's incorrect proof of Riemann's hypothesis, the article https://rjlipton.com/2018/09/26/reading-into-atiyahs-proof/ is an interesting read. (I had bookmarked this entry on Wed Sep 26 15:51:47 2018 and put it here 2024-04-03.)

The article https://www.johndcook.com/non_central_chi_square.pdf sounds interesting:
John D. Cook Upper bounds on non-central chi-squared tails and truncated normal moments (2010). UT MD Anderson Cancer Center Department of Biostatistics Working Paper Series. Working Paper 62.
Abstract. We show that moments of the truncated normal distribution provide upper bounds on the tails of the non-central chi-squared distribution, then develop upper bounds for the former.