Mein Arbeitsalltag dreht sich unter anderem um Informations- und Wissensmanagement (PIM, PKM), digitales Notieren und wissenschaftliches Arbeiten. Seit einiger Zeit setze ich mich im NoteLab für digitale Souveränität ein: offene Formate wie Markdown, dezentrale Plattformen wie Mastodon und PeerTube (Lohner & Siegel, 2026) und Tools wie Obsidian, das meine Notizen lokal auf der Festplatte speichert – statt in proprietären Lösungen von Quasi-Monopolisten.

Doch zwischen Ideal und Praxis klaffte eine Lücke: Mein Laptop lief mit Windows und Microsoft 365, mein Smartphone war ein iPhone 13 mit iOS. Beide Systeme sind Closed-Source, sammeln Daten und binden Nutzer:innen in Ökosysteme ein, die Konto-Zwänge, Tracking und Abhängigkeiten schaffen. Das widersprach zunehmend meinen Werten – und meinen Anforderungen an sicheres, fokussiertes Wissensmanagement.

Also habe ich auf den 4. Digital Independence Days den Schritt gewagt:

• Ubuntu und LibreOffice (alternative OnlyOffice) ersetzen Windows und Microsoft Office auf meinem Laptop.
• GrapheneOS auf einem Google Pixel 9 löst mein iPhone ab.

Für Augen, Nacken und das Wohlbefinden sind Pausen davon sinnvoll und wichtig.

There's a variety of places - on Earth and beyond - that pose challenging conditions to the ever-shrinking digital circuits of today. Making those tiny transistors work reliably when bombarded with charged particles in the vacuum of space, in the underground tunnels of CERN or in your local hospital's X-ray machine is not an easy feat. This talk is going to shed some light on what can be done to keep particles from messing up your ones and zeroes, how errors in digital circuits can be detected and corrected, and how you may even re-purpose those flipped bits in your RAM as a particle detector.

This talk will introduce the audience to the class of problems that digital circuits are faced with in challenging radiation environments. Such environments include satellites in space, the electronics inside particle accelerators and also a variety of medical applications. After giving an overview of the various effects that may cause malfunctions, different techniques for detection and mitigation of such effects are presented. Some of these techniques concern the transistor-level design of digital circuits, others include triple modular redundancy (TMR) and correction codes. Some open source software solutions that aid in the design and verification of circuits hardened against such problems are presented, and of course a 'lessons learned' from our experiences in the field of particle detector electronics will be shared.

Krita is a sketching and painting program designed for digital artists. Our vision for Development of Krita is —

Krita is a free and open source cross-platform application that offers an end-to-end solution for creating digital art files from scratch. Krita is optimized for frequent, prolonged and focused use. Explicitly supported fields of painting are illustrations, concept art, matte painting, textures, comics and animations. Developed together with users, Krita is an application that supports their actual needs and workflow. Krita supports open standards and interoperates with other applications.

Krita’s tools are developed keeping the above vision in mind. Although it has features that overlap with other raster editors its intended purpose is to provide robust tool for digital painting and creating artworks from scratch. As you learn about Krita, keep in mind that it is not intended as a replacement for Photoshop. This means that the other programs may have more features than Krita for image manipulation tasks, such as stitching together photos, while Krita’s tools are most relevant to digital painting, concept art, illustration, and texturing. This fact accounts for a great deal of Krita’s design.

You can download this manual as an .

Kürzlich konnte man den Eindruck gewinnen, der seit Jahren heftig kriselnde Journalismus habe endlich das Tunnelende erreicht.

Von Franco Zotta

Die britische Tageszeitung Guardian verdient wieder Geld. Und der als Newsletterschreiber bekannt gewordene Ex-Spiegel– und Ex-Handelsblatt-Journalist Gabor Steingart hat die Gründung des Verlags Media Pioneer Publishing verkündet, wo mit neuem privatwirtschaftlichem Geschäftsmodell Qualitätsjournalismus (mit dem Motto: „100 Prozent Journalismus. Keine Märchen“) finanziert werden soll. Ist das das lang ersehnte Licht am Ende eines langen, langen Medienkrisentunnels, wie die Süddeutsche Zeitung titelt?

Schön wär’s. Doch wenig spricht dafür. Betrachten wir zunächst genauer den Guardian.

WaveDrom draws your Timing Diagram or Waveform from simple textual description.
It comes with description language, rendering engine and the editor.
WaveDrom editor works in the browser or can be installed on your system.
Rendering engine can be embeded into any webpage.

Building digital photo frames for family and friends using open-source hardware1 and free software in X=? minutes.

Building a Modern Computer from First Principles

The official companion web site of Nand2Tetris courses

And of the book The Elements of Computing Systems, MIT Press, By Noam Nisan and Shimon Schocken

The site contains all the software tools and project materials necessary to build a general-purpose computer system from the ground up. We also provide a set of lectures designed to support a typical course on the subject.

The materials are aimed at students, instructors, and self-learners. Everything is free and open-source; as long as you operate in a non-profit educational setting, you are welcome to modify and use our materials as you see fit.

• Cyclone V GX 5CGXFC5C6F27C7N  Device
  • LPDDR2, SRAM, FLASH EPCQ256
  • Arduino Header, 2x20 GPIO Header, HSMC, UART to USB, HSMC, HDMI TX