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Der Hub wird spätestens Ende Januar archiviert, alle nutzerbezogenen Inhalte, Boards und auch einige Wiki-Seiten werden dabei entfernt. Alle öffentlichen Assemblies, Projekte und Veranstaltungen bleiben. // The hub will be archived by end of January. All user-provided content, boards and several wiki pages will be deleted. All public assemblies, projects and events will remain.

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One

Greenhouse Gas Emission Data: Public, difficult to access, and not always correct (en)

Hanno Böck

Data about greenhouse gas emissions, both from countries and individual factories, is often publicly available. However, the data sources are often not as accessible and reliable as they should be. EU emission databases contain obvious flaws, and nobody wants to be responsible.

Celestial navigation with very little math (en)

Trammell Hudson

Learn how to find your position using a sextant and a custom slide rule, almost no math required!

What Makes Bike-Sharing Work? Insights from 43 Million Kilometers of European Cycling Data (en)

Martin Lellep, Georg Balke, Felix Waldner

Bike- and e-bike-sharing promise sustainable, equitable mobility - but what makes these systems successful? Despite hundreds of cities operating thousands of shared bikes, trip data is rarely public. To address this, we built a geospatial analysis pipeline that reconstructs trip data from publicly accessible system status feeds. Using this method, we gathered **43 million km** of bike-sharing trips across **268 European cities**. Combined with over **100 urban indicators** per city, our analyses reveal how infrastructure, climate, demographics, operations, and politics shape system performance. We uncover surprising insights - such as why some e-bike systems underperform despite strong demand - and highlight how cities can design smarter, fairer mobility. All data and code are open-source, with an interactive demo at bikesharingflowmap.de.

Supplements und Social Media – wenn der Online-Hype zur realen Gesundheitsgefahr wird (de)

Christoph Wiedmer

Nicht zuletzt durch die Werbung in den sozialen Medien werden in Deutschland immer mehr Nahrungsergänzungsmittel verkauft. Einige Influencer bringen sogar ihre eigenen Präparate auf den Markt. Gleichzeitig häufen sich Fälle, in denen die Einnahme von vermeintlich harmlosen „Supplements“ zu Gesundheitsschäden geführt hat. Der Vortrag will daher die Mechanismen hinter dem Supplement-Hype aufzeigen, zudem erklären, warum aktuell ein ausreichender Verbraucherschutz insbesondere im Internet nicht gewährleistet werden kann, wo Handlungsbedarf für die Politik besteht und wie man sich selbst vor fragwürdigen Produkten schützen kann.

Die große Datenschutz-, Datenpannen- und DS-GVO-Show (de)

Alvar C.H. Freude

Datenschutz darf auch Spaß machen, und alle können dabei etwas lernen, egal ob Einsteiger oder Profi-Hacker: Bei dem Datenschutz- und Datenpannen-Quiz kämpfen vier Kandidat:innen aus dem Publikum zusammen mit dem Publikum um den Sieg. Nicht nur Wissen rund um IT-Sicherheit und Datenschutz sondern auch eine schnelle Reaktion und das nötige Quäntchen Glück entscheiden über Sieg und Niederlage. Die Unterhaltsame Datenschutz-Quiz-Show mit Bildungsauftrag!

Ground

Azubi-Tag Einführung (de)

Jedes Jahr zwischen Weihnachten und Neujahr treffen sich tausende Hacker*innen zum Chaos Communication Congress in Hamburg. Der Azubi-Tag ist eine günstige Gelegenheit für Auszubildende, den Congress zu besuchen, den CCC kennenzulernen und viel über IT-Security, Technik und Gesellschaft zu lernen. Wir freuen uns, diesen Tag nun zum dritten Mal anbieten zu können.

Design for 3D-Printing (en)

rahix

3D-Printers have given us all the unprecedented ability to manufacture mechanical parts with a very low barrier to entry. The only thing between your idea and its physical manifestation is the process of designing the parts. However, this is actually a topic of incredible depth: Design engineering is a whole discipline to itself, built on top of tons and tons of heuristics to produce shapes that are functional, strong, and importantly: well-manufacturable In this talk, I will present the rules for designing well-printable parts and touch on other areas of design considerations so you can learn to create parts that work first try and can be reproduced by others on their 3d-printers easily.

Teckids – eine verstehbare (digitale) Welt (de)

Keno, Darius Auding

Die Teckids-Gemeinschaft bringt Kinder, Jugendliche und Erwachsene zusammen, um gemeinsam aktiv für eine verstehbare (digitale) Welt zu sein.

Shit for Future: turning human shit into a climate solution (en)

Elena

Humanity has already crossed the point where simply reducing emissions will no longer be enough to keep global warming below 2°C. According to the IPCC (AR6, WGIII), it is now essential to actively remove greenhouse gases from the atmosphere in order to meet global climate targets, maintain net-zero (or even net-negative emissions), and address the burden of historical emissions. At the same time, degraded soils and the climate crisis are a threat to global food security. Two years ago, I presented an overview of different methods available for carbon dioxide removal. Today, I want to show you an example of how CO₂ can be removed from the atmosphere while simultaneously improving the lives of local communities: Human shit. Human shit is a high abundant biomass, contains critical nutrients for global food security, and causes serious health and environmental issues from poor or non-existent treatment outside industrial countries. Converting shit into biochar presents a powerful solution: the process eliminates contaminants, stabilizes and locks away carbon, and can be used to improve agricultural soils. The challenge is that most nutrients in this biochar are not accessible to plants. To overcome this, I mixed human and chicken shit and produced a “Superchar” that releases far more nutrients. It’s not magic, it’s just some chemistry and putting aside your prejudices and disgust. I’ll show you how I did some shit experiments in Hamburg and Guatemala and how you can do it too.

Zero

Lightning Talks - Tag 3 (de)

Bonnie, keldo, Andi Bräu

Lightning Talks - Tag 3

Light in the Dark(net) (en)

Tobias Höller

Science is hard and research into the usage of the Tor network is especially so. Since it was designed to counter suveillance, it gathering reliable information is difficult. As a consequence, the studies we do have, have yielded very different results. This talk investigates the root causes of contradicting studies by highlighting how slight changes in methodology or data selection completely change the results and thereby our understanding of what the Darknet is. Whether you consider it the last bastion of freedom or a haven of crime, this talk will tell you where to look and what to ignore in order to confirm your current opinion. And in case you are open to changing it, we have some food for thought for you.

Human microservices at the Dutch Railways: modern architecture, ancient hardware? (en)

Maarten W

The Dutch railways have been operating an increasingly complicated network of trains for over 80 years. The task of overseeing it is far too complex for a single human. As such, a network of specifically scoped humans has been connected. Over time, computers and software have been introduced into the system, but today there is still a significant role for humans. This talk describes the network of "human microservices" that is involved in the Dutch Railways' day to day operation from the eyes of a software developer.

Fuse

BE Modded: Exploring and hacking the Vital Bracelet ecosystem (en)

cyanic

The Vital Bracelet series is an ecosystem of interactive fitness toys, content on memory chips, and apps that talk via NFC. In this talk, we'll explore the hardware and software of the series, from its obscure CPU architecture, to how it interacts with the outside world, from dumping OTP ROMs and breaking security, to making custom firmware.

When 8 Bits is Overkill: Making Blinkenlights with a 1-bit CPU (en)

girst (Tobi)

Over the last half year I have explored the Motorola mc14500 - a CPU with a true one-bit architecture - and made it simulate Conway's Game of Life. This talk gives a look into how implementing a design for such a simplistic CPU can work, and how it's possible to address 256 LEDs and half a kiloword of memory with just four bits of address space.

Von wegen Eisblumen! Wie man mit Code, Satelliten und Schiffsexpeditionen die bunte Welt des arktischen Phytoplanktons sichtbar macht (de)

Moritz Zeising (er/he)

Die Arktis ist eine Region, in der die Sonne monatelang weg ist, dickes Meereis den Weg versperrt und deshalb Forschungsdaten ziemlich rar sind. Kompliziert also, herauszufinden was im Wasser blüht! Mit einer Kombination aus Satellitenbildern, Expeditionen und Modellsimulationen auf Hochleistungsrechnern versuche ich, das Verborgene sichtbar zu machen: die faszinierende, farbenfrohe Welt des arktischen Phytoplanktons.

Netzpolitik in der Schweiz: Zwischen Bodensee und Matterhorn (de)

Kire, Rahel

Auch in der Schweizer Netzpolitik ging es im auslaufenden Jahr drunter und drüber. Wir blicken mit gewohntem Schalk auf das netzpolitische Jahr 2025 zwischen Bodensee und Matterhorn zurück - und diskutieren jene Themen, die relevant waren und relevant bleiben.

The Spectrum - Hackspace Beyond Hacking (en)

sjaelv, MultisampledNight

The Spectrum is a newly founded queer-feminist, intersectional hackspace centering FLINTA+, disabled, and marginalized beings. We see hacking as playful exploration—of technology, art, and ideas—to reimagine what inclusion and collaboration can be. At 39C3, we share how awareness, accessibility, and transdisciplinary creation can transform community and hack the norm.

Chaos Computer Music Club

Ninsn (de)

Nina

Soundcloud: https://soundcloud.com/ninsnberlin

Wante (DJ Set) (de)

Wante

Wante (Cologne) is drawn to dark, tunnely sets. With a soft spot for long, atmospheric, break-driven intros, her carefully curated selections evolve into relentless, hypnotic techno with ambient soundscapes.

Rob StrobE (de)

Rob StrobE

THE SECOND DECADE Born `78 in Germany Rob StrobE grew up and being influenced with classical music, swing and jazz in his childhood. He early discovered the likes of Depeche Mode, Michael Jackson, Kraftwerk and more early electronic music approaches. In his late youth/early adult life he frequently travelled to Frankfurt attending nights at the Omen. Those nights and weekends were filled with DJs like Sven Vaeth, Dj Rush, Chris Liebing, G-Man aka Gez Varley, Hardfloor and so many more, celebrating and transporting the spirit of those days! After the closing of the Omen in late 1998 he went on to clubs like u60311, Tanzhaus West, MTW and others and eventually started his career as professional (sound) technician and light jockey. Around the year 2002 he started music production - mostly for personal fun and recreational purposes - but some records and remixes have been released since then...some of this older work can still be found on his Soundcloud! Since then he developed his own company specialized on music studio technology, room acoustic, signal flow schemes and studio furniture. Meanwhile his own studio transformed from a small Home Studio to a „room-in-room“ environment in the Logic Haus - the former home of Harthouse, Eye-Q and Snap! If he had to describe his musical style and give it a name: it would be „DubHouseTechno with a pinch of Detroit" ;) FastFoward: Year 2021 - after a 7 year break of releasing music, Rob StrobE is back with releases on imprints like Lucidflow, ASrecords, Tantara, Motech and numerous others! Rob used the time to do a major swap from software based production over to the modular and hardware world and the output speaks for itself! Enjoy his music and come pass for a visit on his social media outlets and say „hello“! THANKS FOR YOUR SUPPORT!!! COLLABORATIONS with G-Man aka Gez Varley (Swim/Quo Vadis/UK) Bo_Irion (Conaisseur/FFM) APro (Audio Emissions/FFM) Voodoe (Audio Emissions/FFM) Frank Kusserow (Data Punk/WhiteNoise/FFM) Israel Toledo (ASRecords/Mexico)

Project Poltergeist (en)

Alexeyan

Project Poltergeist Live [Hard Techno, Psytrance, Hard Dance]

Gwen Wayne (de)

Unnamed user

Ey chill mal!!Nix da!!! Denn manche mögen's heiß, und manche mögen's nice.......und Shitstormtechno verliert NIE seine hotte credibility! Lass dich überraschen! N´abend

Chill Floor

Der feine Schliv (de)

Der feine Schliv

Zwischen Rap, Tanz und Poesie, erschließt Der feine Schliv neue Räume. In ihren Performances changiert sie zwischen provokanten Auf-die-Fresse-Ansagen an das Patriarchat und empathischen Erzählungen vom Versuchen und Scheitern. Sie tritt unter anderem mit dem serbischen Nachwuchs Duo “Slezga” sowie mit den Hamburger Gruppen “Fallbeil” und “Yummy Air”auf. An der Diverstität ihrer Begleitungen zeichnet sich ihr musikalisches Universum ab, von balladigen Conscious Raps, Chansons und Witchy Toasting.

Betontes Schonen (de)

Jeanette

Dj Set

Der verlängerte Atem pres. Ghost Processes (de)

Martin, Fiona, Jil

Der verlängerte Atem pres. Ghost Processes Seit 2020 sendet Der verlängerte Atem regelmäßig auf HALLO:Radio und tourt mit Gastauftritten auf Festivals und Veranstaltungen in und um Hamburg. Als offenes Radiolabor zwischen Musik, Redebeiträgen und thematisch passenden Audio-Snippets, verweben die Vinyl-DJs, Künstlerinnen und Radiomacherinnen Fiona Grassl, Jil Lahr und Martin Ramacher analoge Klänge, Stimmen und Gedanken zu thematischen Sendungen. Für den 39C3 fährt Der Verlängerte Atem das System herunter - und wieder hoch. Und findet dazwischen: Prozesse ohne Besitzer, Threads ohne Aufgaben, Routinen, die längst beendet sein sollten und doch weiterlaufen. Geisterprozesse flüstern im Hintergrund, aktualisieren sich selbst, verlieren den Takt oder schlafen zu tief, um je zurückzukehren. Zwischen knisterndem Vinyl, digitalem Summen, Glitches und verspielten Redebeiträgen entstehen live Sound-Landschaften, in denen nichts ganz verschwindet - und alles wiederkehrt. Spooky.

kathadingsda (en)

dingsda

kathadingsda vereint treibende Beats und sanfte Grooves mit dubbigen Elementen und experimentellen Klängen. So entstehen warme, organische Soundwelten, die sich stetig verändern und in Bewegung bleiben.

Nixe (de)

Nixe

Dj Set

Vorglühmarkt

HolleLang (en)

HolleLang

HolleLang has been supplying the dance floor with his ever evolving personal blend of Dub infected Techno, rooted both in House and flashing Rave music alike. A seasoned vinyl dj HolleLang does not overestimate the medium but focuses on the music and atmosphere. No punishing jockey from the dark side, his sets are known to vibrate with well wishing force and sometimes fierce intensity though while keeping a good sexy groove going. Former resident of well received "No f**ing Day Can Destroy My Love" party series, and long running host of Gumbo Frisst Schmidt/Nachtschleifer radio live broadcast on Hamburg‘s decades old independent station FSK, HolleLang unites both ceremonial dj talent and activist attitude to serve the community. He loves music so much, especially house music ❤️ Look at https://soundcloud.com/hollelang.