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Sebastian Büttrich @ ITU

@sebastian@social.itu.dk
mastodon 4.5.12
  • Open on social.itu.dk

#IT, #networks, #science, #energy - #IoT, #LoRa, #LoRaWAN, #satellites #sysadmin

Has a #life outside work ... which ich a lot about #metal #poetry #plants #cacti #succulents #kenya

#fediverse #admin for https://social.itu.dk, https://metal.social

237 Followers
372 Following
22 Posts
Joined November 22, 2022
room:
5A56
mail:
sebastian@itu.dk
phone:
72185126
Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 4w ago
Boosted by @welcome@friends.deko.cloud
welcome, @kat@social.itu.dk - one more #ITUniversity colleague and DISCO spacer joining! Make sure to write an #introduction with plenty of your fave hashtags like #space #satellite #discosat #cubesat and such :) much reach, very impact
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Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

My university uses #Geoblocking of known evil countries.

#Geoblocking is a very sensible and appropriate security measure, as it ensures that

only those with evil and hostile intentions get to your sites -
because for those, geoblocking is easy to circumvent -

while all normal naive believers in global connectivity - such as scientists, academics, students - are left out.

I commend the use of #geoblock

#science #university #network #nren

social.itu.dk
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 6mo ago

Danish Student #Cubesat Project -

https://discosat.dk

second #satellite, #DISCO 2 -

first contact 31 March 02:38 UTC, confirming #TLE and battery charge state optimal.

#DISCO #satellite #cubesat #greenland #denmark #EarthObservation

social.itu.dk

social.ITU.dk

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 6mo ago

Our Danish Student #Cubesat Project's second #satellite, #DISCO 2, successfully deployed today

Also pictured: #Earth

#Denmark #Greenland #EarthObservation #Sband #VHF

social.itu.dk

social.ITU.dk

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

Very happy to be working with my friends and colleagues in #Nepal again.
Our oldest memories go back nearly 20 years, when we deployed #wifi in the #himalaya - two old pictures included.

#mastodon presence in #Nepal still small (i guess) (pls shout if you are in Nepal!)

and anyway this post would be invisible to them, as my university has a #geoblock against all of Nepal ... duh :(

#wireless #NepalWireless
#NREN #Nepal workshop 2026
#Campus #Network Design and Operations
#NSRC #Kathmandu

social.itu.dk
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 4mo ago

RE: @astro@c3d2.social

yes, happy #IPv6 day to all - though here at #ITUniversity it is not being celebrated ;)

c3d2.social
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

Power of #data:
I heard today in a talk that the average #salary in #Kenya should be EUR 300 - 500 ... knowing Kenya well, i could not recognize that.
The explanation? "Average salary" is measured among those with jobs in the formal sector - which is ... 17% of those in workforce.
The reality for the vast majority is way lower.

Some data:

https://wage.is/kenya/

#low_salary

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

Better late than never -
three big political parties in #germany leave X for good

https://www.tagesschau.de/inland/spd-gruene-linke-rueckzug-x-100.html

#gernan #germany #politics #socialMedia #corporateSocialMedia

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

People's resistance against #hyperscale
#datacenters in #Denmark

https://www.information.dk/moti/2026/04/nej-tak-kan-godt-skrive-stort

[paywall]

#thereIsNoAI
#thereIsInParticularNoSustainableAI

social.itu.dk

social.ITU.dk

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

Looking forward to
two days of

Making Sense of Water

one day working with data & ideas around

open ocean data &
sensor-based monitoring of marine ecosystems

April 21: 12 - 16

April 22: 10 - 16

.... you are welcome for just part of it,
no matter where you are from!

#marine #ecosystems

#open #data

#maritime #environmental

April 21-22 at #DASYA

#ITU #Copenhagen

social.itu.dk
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

Always a favorite - FruitML = teaching simple #TinyML with #fruit detection as the task, in our #IoT course

#yolo #mobileNets #InternetOfThings #MachineLearning #EdgeImpulse #TeachableMachines

#thereIsNoAI
#thereIsInParticularNoSustainableAI

but some tiny ML is fun

#whoNeedsDataCenters

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 4mo ago

First ever #AI-#native operating system. From hardware to UI –
#Claude #Code controls everything on your computer

https://vibeos.sh/

hint:
#thereIsNoAI
#thereIsInParticularNoSustainableAI
#OS #OperatingSystem #vibe

social.itu.dk

social.ITU.dk

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 4mo ago

"This paper analyzes and identifies a space-based Global Navigation #Satellite System (#GNSS) interference source that has caused
scores of powerful transient wide-area interference events over continental #Europe, #Greenland, and #Canada since 2019. ... these techniques to confidently identify the GNSS #interference
source as a constellation of #Russian early warning #satellites in Molniya (“lightning”) orbits"

https://arxiv.org/abs/2606.03673

social.itu.dk

social.ITU.dk

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 8mo ago
Replying to
@cstross@wandering.shop @bsdphk@fosstodon.org One reason he has to get more and more greedy is He fails in one thing after the other. He kind of had to try as president, and now he shows the world you can fail even in that ultimate position of power.
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 10mo ago

#German #Physical Society Call for Action

"Global Warming is accelerating - a call for decisive action - The new climate call from DMG and DPG shows that climate change is continuing unabated and accelerating. "

https://www.dpg-physik.de/veroeffentlichungen/publikationen/stellungnahmen-der-dpg/klima-energie/klimaaufruf
[ #german ]

@DPGPhysik@wisskomm.social
#climate #climateChange #science #klima #3degrees

@Klimakom_DMG@climatejustice.social

social.itu.dk
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago
Replying to
@MySideIsHumanity@myprivate.social Those are the ones we trust and host our data with.
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

As part of the April 21-22 Workshop Senseboat - Making #Sense of #Water,

we are happy to host

Laura Casanovas,
Data Scientist at #Sensemakers

for a talk on

Computer vision techniques for scaling up seabed mapping

talk and sharing of #marine AI work in progress

#ITU, April 22, 10.00 - 11.00 h 3A08

https://dasya.itu.dk/posts/lauracasanovas_20260422/

social.itu.dk
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 5mo ago

i m not sure i had seen this before -
the links service on #truthSocial

https://links.truthsocial.com/

being used for #phishing campaigns,

with (rather good) complete copies of danish web/#dns service https://one.com , encouraging me to renew my #domains there.

such usage kinda fits the site's owner.
not sure it makes sense to send complaints to them ...

social.itu.dk
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 18mo ago
Replying to
@skiles@carhenge.club Or, to only leave the humans who control the AIs in the loop. AIs do not act autonomously. They are trained, deployed, controlled. It is romantic and popular to assign them agenda - but they act on behalf of people. Just a very very small group of people. That s the project here. #thereIsNoAI #onlyPowerTools
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Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 4mo ago

"The Trump administration is targeting one of the world’s most trusted sources of #climate and oceanic data—the Ocean Observatories Initiative (#OOI). According to the New York Times, ships will be dispatched this month to remove the more than 900 deep-sea instruments that comprise the network, which, for the past decade, has collected crucial data on physical, chemical, geological and biological conditions from all layers of the Atlantic and Pacific #Oceans... "

https://www.scientificamerican.com/article/trump-administration-takes-aim-at-crucial-ocean-monitoring-network/

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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 1mo ago
Boosted by @welcome@friends.deko.cloud
Aware that the #ITU #mastodon node is but a little appetizer and demonstrator, with most of us having other primary accounts elsewhere, we happily welcome new users @mogel@social.itu.dk and @ieso - writing an #introduction (with some of your favorite hashtags) is a good way to get in touch when you are new on #mastodon
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Open post
Sebastian Büttrich @ ITU @sebastian@social.itu.dk
· 3mo ago
Replying to
@sebastian@mastodon.cc @david_chisnall@infosec.exchange @tante@tldr.nettime.org also, Note that this is not a final court ruling, just a so called "preliminary injunction" (einstweilige Verfügung) by a relatively low-ranking court - there are unfortunately many ways in which this could be overturned. #Google #AI #court #germany Court ruling: https://the-decoder.de/wp-content/uploads/2026/06/26_O_869_26_begl_Abschrift_Urteil_v_28_05_2026_Geschwaerzt_Geschwaerzt_Geschwaerzt.pdf context, german: https://www.golem.de/news/google-stoererhaftung-gilt-nicht-fuer-ki-uebersicht-von-suchergebnissen-2606-209625.html
the-decoder.de
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