A 2023 #scientist #linocut for #ArtAdventCalendar of #astronomer Vera Rubin (neé Cooper, ‘28-‘16) & her discovery that angular motion of galaxies deviates from predictions, 1st evidence for dark matter, now known as 5x as common as matter & the stuff which dictates dynamics of galaxies & evolution of our universe! The Nobel committee waited 3 years after she died to reward another for the theory of dark matter.

She found 6 months mat leave post MSc very difficult 🧵1/n

#printmaking #sciart

#EmacsConf was tons of fun! :) The prerecorded videos are up at https://emacsconf.org/2023/talks and I'll work on extracting the live talks and Q&A this month.

It ain’t much, but it’s honest work. Az/El sensors serial (SSI) to Arduino board. Removed an RS485 layer.
@adafruit 1/4 size proto boards are cute.

Just tripped across this blast from the past: my first published article, in an .au electronics magazine.

Remember paper magazines? No? Ok.



#hamradio #amateurradio #satellite #electronics

Hey #Linux #Kernel people. Last year we had the first #Kernel Devroom at #FOSDEM. And we're running the #Kernel Devroom for #FOSDEM in 2024 as well!

#FOSDEM 2024 is taking place over the weekend of the 3 & 4 February in Brussels, Belgium!

It is a wonderful event that's very close to my and a lot of people's hearts!

Join @rppt, Daniel Borkmann, and @stgraber, and myself and make this another great #FOSDEM!

We're very excited for your submissions!

https://lists.fosdem.org/pipermail/fosdem/2023q4/003536.html

📢 The CfP for the 2024 Linux Security Summit North America is open!

https://events.linuxfoundation.org/linux-security-summit-north-america/program/cfp/

Location: Seattle, USA

Dates:
- CfP close: January 21, 2024
- Speaker notifications: February 06, 2024
- Event: April 18-19 2024

Performed some more mm-wave testing at the PNW Microwave build day, looking at the output of the 40-50 GHz quadrupler. Thanks to W7GLF for bringing in his spectrum analyzer & external mixer. Results forthcoming.


#amateurradio #hamradio #microwave #mmwave #electronics

Videos and slides from the 2023 Linux Security summits may be found here:

• Linux Security Summit North America (LSS-NA), May 10-12 2023, Vancouver, Canada.
  • Video playlist
  • Slides & abstracts
• Linux Security Summit Europe (LSS-EU), September 20-21 2023, Bilbao, Spain.
• Video playlist
• Slides & abstracts

This is the good stuff:

→ https://fedoramagazine.org/create-images-directly-from-rhel-and-rhel-ubi-package-using-mkosi/

written by @zbyszek

Getting ready to do a test run of my probing class for my first in person beta audience.

This will be my second test run of the lecture (first was a YT livestream a year or so ago) and the first time doing the labs.

There's still more meat I want to add especially towards the end of the class (e.g. the section on current probing is just a handful of slides, and there's no lab for it yet as i don't have any current probes here) but it'll be good to get feedback from a test audience on pacing and content.

Probably going to do at least one more test round early next year before I start doing it officially. Looking into getting registered with IEEE to provide approved continuing education / professional development hours as well.

Testing a Ka band LNB, specified for 20.2-21.2 GHz. I could not see any signals beyond 22.8 GHz (well short of the 24 GHz amateur band), but that could be due to issues at the IF level. Worth investigating further. I was able to see a good signals at 22.2, an important radio astronomy frequency. #amateurradio #microwave #radioastronomy

@jcutting this is the content I signed up for

RE: https://social.vivaldi.net/users/jcutting/statuses/111446741178195059

Just received this in gmail. Seems like my ad blocker and/or ublock origin is working well here to stop them tracking my behavior. I have in fact been opening their emails. UbO for the email shows dozens of blocked requests to play.google.com and other related sites.

Current non-fiction reading pile.

#systemd v255-rc2 is out, go test it or else we'll deprecate your favorite feature https://github.com/systemd/systemd/releases/tag/v255-rc2

We gave two talks about Hypervisor Enforced Kernel Integrity and Linux Virtualization Based Security at #LinuxPlumbers - Leveraging KVM or Hyper-V to harden a VM:
- global project overview: https://lpc.events/event/17/contributions/1515/
- KVM implementation: https://lpc.events/event/17/contributions/1486/
- code: https://github.com/heki-linux

#PicoGUS 2.0 is officially released! It's an ISA card that can emulate Gravis Ultrasound, Adlib, CMS, Tandy 3-voice, MPU-401 w/ Intelligent Mode, and gameport joysticks!
This new version is 100% factory assembled and ready to just plug and play.
And it's open hardware: all design files are available under CERN OHL v2 Permissive license, so if you want to make (or improve) your own you can!
Available at my Tindie Store: https://www.tindie.com/products/polpo/picogus-sound-card-emulator-for-isa-retro-pcs/

It’s not everyday you get to touch an SR-71. It didn’t quite feel like metal, the paint seems to dampen it?

ICYMI: we've recently done some work on the #systemd documentation rendered on freedesktop.org, and now all manpages have a drop-down menu to select the release version to visualize. Also individual options are now tagged with the version they were first introduced in. These improvements should hopefully help readers with understanding what options are available in what version.

Example: https://www.freedesktop.org/software/systemd/man/255/systemd.exec.html

Here's a little new project of mine:

https://github.com/poettering/diskomator

It's an mkosi-built OS-in-a-single-EFI-binary whose only job is to expose all local disks via NVMe-TCP. You can write it to an USB stick, or drop it in your ESP, and if you boot it, all block devices are exposed to the network. The suggested command line to connect to this disk is shown on screen.

This makes use of the systemd-storagetm service we added for systemd v255, as well as the `esp` output added in mkosi v19.