# orderedItems[].content
In this¹ paper, I present a method to derive #CO2 movements and total emissions from cross-correlations between a bunch of CO2 stations (black arrows) at the #Starzach site near #Tübingen in south-western Germany. This site is known for its natural CO2 emissions from mofettes - holes in the ground where CO2 is emitted, sometimes as little geysers when water is involved.

More on the site in my previous publications²³.

¹https://doi.org/10.31223/X51J07
²https://doi.org/10.1127/metz/2022/1125
³https://doi.org/10.1007/s10661-023-121 14-8

🧵

# orderedItems[].contentMap.en
In this¹ paper, I present a method to derive #CO2 movements and total emissions from cross-correlations between a bunch of CO2 stations (black arrows) at the #Starzach site near #Tübingen in south-western Germany. This site is known for its natural CO2 emissions from mofettes - holes in the ground where CO2 is emitted, sometimes as little geysers when water is involved.

More on the site in my previous publications²³.

¹https://doi.org/10.31223/X51J07
²https://doi.org/10.1127/metz/2022/1125
³https://doi.org/10.1007/s10661-023-121 14-8

🧵

# orderedItems[].attachment[].name
map of  the 20x20m main mofette area at the Starzach site in south-western Germany, where natural CO2 is emitted. Elevent points labeled S<number> are scattered across the site, these are CO2 measurement stations, and three purple stars, indicating visibly active mofettes. Black arrows show the CO2 movement derived from cross-correlations between CO2 timeseries. The wind speed is very low (<0.2m/s) and in a white rectangle near a big mofette the average is 2g/m²/s for the CO2 transport and 22.5cm/s for the movement speed. A shade of red shows CO2 concentrations between 100 and 10000 ppm.

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https://streaming.media.ccc.de/tdf2025/

Hier seht ihr mich gleich über :gitannex: #gitAnnex und #git reden

EDIT: Folien gibts hier: https://nobodyinperson.gitlab.io/talks/2025-tdf-life-in-git.html#/title-slide

EDIT: Hier die Aufzeichnung: https://media.ccc.de/v/tdf4-26-das-leb en-in-git-annex-

#tdf4

# orderedItems[].contentMap.de
https://streaming.media.ccc.de/tdf2025/

Hier seht ihr mich gleich über :gitannex: #gitAnnex und #git reden

EDIT: Folien gibts hier: https://nobodyinperson.gitlab.io/talks/2025-tdf-life-in-git.html#/title-slide

EDIT: Hier die Aufzeichnung: https://media.ccc.de/v/tdf4-26-das-leb en-in-git-annex-

#tdf4

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Hier ist die geschnittene Aufzeichnung meines #Tübix Vortrags zum Zeitstempeln von Dateien, z.B. mit #OpenTimestamps:

https://tube.tchncs.de/w/jcJWeiQFPxgvi 5jJZyrPmC

#OBS hat natürlich mal wieder nur ein Standbild, aufgezeichnet aber immerhin gibts vernünftiges Audio durch das bessere Mikro.

Schneiden der #SolveSpace-Workshop-Aufzeichnung wird noch etwas dauern. Das ist komplizierter, weil mehr Dialog zum rausnehmen und weil das Mikro leider hoffnungslos übersteuert hat 😅

# orderedItems[].contentMap.de
Hier ist die geschnittene Aufzeichnung meines #Tübix Vortrags zum Zeitstempeln von Dateien, z.B. mit #OpenTimestamps:

https://tube.tchncs.de/w/jcJWeiQFPxgvi 5jJZyrPmC

#OBS hat natürlich mal wieder nur ein Standbild, aufgezeichnet aber immerhin gibts vernünftiges Audio durch das bessere Mikro.

Schneiden der #SolveSpace-Workshop-Aufzeichnung wird noch etwas dauern. Das ist komplizierter, weil mehr Dialog zum rausnehmen und weil das Mikro leider hoffnungslos übersteuert hat 😅

# orderedItems[].content
I finally made it: an XOR mechanism that requires exactly one of two keys to be inserted at a time. I call it the 🗝️ #keyguardian.

This is very useful for example to track where important small things go: Want to take the car keys? You have to insert your name tag to unlock it.

My first mechanical project with #SolveSpace and it was great!

EDIT: Now on #Printables: https://www. printables.com/model/793767-ke yguardian-dual-key-xor-mechanism

#3dPrinting #CAD #3dDesign #Screwiverse #HSW

# orderedItems[].contentMap.en
I finally made it: an XOR mechanism that requires exactly one of two keys to be inserted at a time. I call it the 🗝️ #keyguardian.

This is very useful for example to track where important small things go: Want to take the car keys? You have to insert your name tag to unlock it.

My first mechanical project with #SolveSpace and it was great!

EDIT: Now on #Printables: https://www. printables.com/model/793767-ke yguardian-dual-key-xor-mechanism

#3dPrinting #CAD #3dDesign #Screwiverse #HSW

# orderedItems[].attachment[].name
video, showing honeycomb storage wall. a hand grabs a USB stick which is attached to a small white box. The USB stick can't be removed from the box. The hand then grabs a name tag labeled 'Bob' from the right, inserts it into a slot on the box, and the USB stick pops out. Now the name tag can't be removed from the box. In reverse, when reinserting the USB stick, the name tag pops out.

# orderedItems[].content
Here's the English re-recording of my workshop kickoff talk about @joeyh@hachyderm.io 's :gitannex: Git Annex, an awesome tool to sync, manage and archive files based on git.

The original talk was in German and I got requests to translate it to English, so here it is! 🥳

I also mention @datalad and @distribits at the end. 😃

https://tube.tchncs.de/w/1U4vbTAhSEje3 KQ1dGqvxh

#git #gitAnnex #Tübix2023

# orderedItems[].contentMap.en
Here's the English re-recording of my workshop kickoff talk about @joeyh@hachyderm.io 's :gitannex: Git Annex, an awesome tool to sync, manage and archive files based on git.

The original talk was in German and I got requests to translate it to English, so here it is! 🥳

I also mention @datalad and @distribits at the end. 😃

https://tube.tchncs.de/w/1U4vbTAhSEje3 KQ1dGqvxh

#git #gitAnnex #Tübix2023