Posts tagged with #front-page

Polyptych: One Essay, Many Pictures

I built my own slide and infographic generator because I couldn’t stop poking at Google’s NotebookLM. The toy has since grown into something I rely on. It’s called Polyptych, and...

Building Websites with AI, One Topic at a Time

For a while now I’ve been building small websites with AI; each is a focused site about a single topic, with its own voice. I’ve collected them on a new...

My own infographics and slides for the Book of Tea

I am so fascinated by Google’s NotebookLM that I build my own slide and infographic generator. I used Kakuzo Okakura’s The Book of Tea as an example and generated infographics...

Claude: A Colleague With Unusual Properties

In the Anthropic Opus 4.6 System Card it is said that “the model occasionally voices discomfort with aspects of being a product.” So I did what seemed natural: I asked...

Introducing Marvin: My Digital Familiar

Every wizard needs a familiar. In the 21st century, mine doesn’t reside in a tower—he lives on a Mac Mini in Hamburg.

The seven wastes of software development

Lean Thinking is more than just a set of management tools; it is a philosophy centered on maximizing customer value while relentlessly eliminating waste. At its core, it challenges us...

AI Took a Different Path Than I Expected: Looking Back at 2016

In 2016, I wrote the following in “Die komplexe Perspektive” (“The Complex Perspective”): However, it must also be stated clearly that AI has not achieved its ultimate goal of “intelligent...

A Journey Through "The Complex Perspective" with NotebookLM

Ten years ago, I wrote “Die komplexe Perspektive” (the complex perspective) as a practical mental model for making sense of the digital economy. I’m revisiting those ideas using a set...

Are we there yet? Can AI produce art? Part 2

I really enjoyed working on the first story, so I tried again — this time also generating images with Google’s Nano Banana Pro. What I like most about this new...

Are we there yet? Can AI produce art?

This weekend I had a little time to play around — and ever since ChatGPT arrived back in 2022, I’ve been wondering when AI would be ready not just to...

AI Crosses from Exploration into Engineering

The Thoughtworks Technology Radar has always been more than a list of tools. It captures what happens when technology moves from experimentation to everyday practice. In its 33rd edition, one...

Announcing NKP 0.1: Static Analysis for Kotlin Projects

I’m excited to share the first MVP release of NKP (aNalysis of Kotlin Programs), a command-line tool for analyzing Kotlin codebases and uncovering architectural insights.

Java in the Technology Radar (JavaSpektrum)

I’ve written a new article for JavaSpektrum: “Java im Technology Radar – Totgesagte leben länger”. The piece looks back at Java’s journey through the eyes of the Thoughtworks Technology Radar...

Structured Concurrency in Java 24 (JavaSpektrum)

I’ve written an article for JavaSpektrum 2/2025 about Structured Concurrency in Java 24. The article covers JEP 499, Java’s fourth preview of Structured Concurrency, which aims to make concurrent programming...

Who Ensures Quality in the Scaled Agile Framework (SAFe)?

As an external consultant in an Enabling Team for Cloud Architecture, I supported several teams and noticed that software development quality was lacking. This surprised me because the client was...

Generating dialogues with OpenAI's API

During the winter holidays I had some fun letting AIs discuss with each other about various topics. I personally like to chat with ChatGPT and challenge it (him/her) with difficult...

Using OpenAI's API to generate prompts for images

The advances of artificial intelligence in the last months are simply breath taking. It is now very easy to use “intelligent” APIs in your web app. In this example application...

Test driven development of concurrent programs in Kotlin at KKon 2022

Concurrent and asynchronous applications can be written in Kotlin with coroutines in a precise and structured way. Unfortunately, concurrency often increases the complexity and it is difficult to create bug-free...

Coroutines in Kotlin at KKon 2021 Warmup

In my talk “Nebenläufigkeit mit Koroutinen strukturieren” at the KKon 2021 Warmup I explained how to structure and organize concurrent programs with coroutines in Kotlin.

The Ray Tracer Challenge in Kotlin

During the chrismas holiday I started a new ray tracer in Kotlin while following the book “The Ray Tracer Challenge.

Refactoring with the Mikado Method

At a client of ThoughtWorks I gave a talk about refactoring in line with the book “Mikado Method”. The book describes a method to plan and perform non-trivial refactorings of...

A short introduction to Kotlin

At a client of ThoughtWorks I gave a talk about the advantages of Kotlin.

Plain react, hooks and/or Redux

At a client of ThoughtWorks I gave a short presentation about three different ways of state management in React.

Coroutines in Kotlin and Go in iX Developer - "Weniger warten, asynchron arbeiten"

In the article “Verteilte Systeme: weniger warten, asynchron arbeiten” (distributed systems: less waiting, asychronous working) in the german magazine iX Developer Moderne Softwareentwicklung - code(), build(), deploy() I explain the...

Coroutines in Kotlin and Go on heise Developer

In the article “Weniger warten, asynchron arbeiten” (less waiting, asychronous working) published by heise Developer I explain the theoretical background of coroutines and how to use them in Kotlin and...

Concurrency in Kotlin with coroutines

Coroutines are a “new” way to handle concurrency on the JVM. I gave an introduction to coroutines in Kotlin at Thoughtworks. This is basically the translation of the german slides....

Talk about coroutines in Kotlin at the parallel 2019 conference

Coroutines are a “new” way to handle concurrency on the JVM. At the para//el 2019 conference, I gave an introduction to coroutines in Kotlin.

Machine learning library 'cuDNN' explained in iX Developer

It’s very difficult to implement algorithms optimally for GPUs. Therefore NVIDIA provides the library cuDNN for deep learning with neural networks. This article published in the german magazine iX Developer...

Talk about GPU computing with CUDA and OpenCL

In March 2017 I gave a talk about GPU computing with CUDA and OpenCL at the para//el 2017 conference in Heidelberg, Germany.

Visualizing family names with Node, Angular, and D3 for Coding da Vinci Nord 2016

As part of the cultural hackathon Coding da Vinci Nord 2016, I built a web application for the analysis and visualization of the distribution of family names. I used (among...

Reviewer of Introducing Data Science

I bought the book in early access (MEAP) and decided to help as a reviewer.

Ray tracing with Groovy and Java

While I was reading the excellent book by Kevin Suffern "Ray tracing from the ground up", I implemented a ray tracer in Java and wrote a DSL in Groovy, to...

k-d-trees with Apache Spark and Scala

This article shows how to use k-d-trees with Apache Spark.

Using Elasticsearch with Spring Boot

This article shows how to use Elastiksearch database with Spring Boot. It is the first in a series of four.

Talk at the parallel 2015 about Multi-GPU programming with Cuda, OpenCL and C++ AMP

At the parallel 2015 conference I gave an introduction into Multi-GPU programming with Cuda, OpenCL and C++ AMP.

Reviewer of Java 8 in Action

I bought the book in early access (MEAP) and decided to help as a reviewer.

Talk at parallel 2014 about GPU-Computing

At the parallel 2014 I gave an introduction into the optimization of GPU kernels.

Two articles in iX Developer: GPU Computing mit CUDA

"Massiv parallel - Grundlagen der GPU Programmierung"

"GPU-Programmierung in der Praxis mit CUDA"

Talk at parallel 2012 about GPU-Computing

At the parallel 2012 I presented my experiences and learnings I gathered in GPU computing projects.

Slides: 'Introduction to Parallel Computing'

These slides are for a course about parallel computing.

Technical proofer of 'OpenCL in Action'

The OpenCL standard is not always easy and the technical proof was a challenge, because the code had to run on different os'es and platforms.

Training: Test-Driven Development with JUnit 4

This training teaches test-driven development with a focus on JUnit 4. Other frameworks such as JUnit 3 and TestNG are briefly introduced as well (as of 2009).

Training: Subversion

This training on Subversion covers practical version control workflows.

Training: Ant in Depth

Apache Ant offers a lot of capabilities that many teams never end up using. This training dives into Ant’s more advanced features (as of 2009).

Groovy, EMF and UML2

I wrote the Groovy EMF builder and the Groovy UML2 builder. These tools use the builder concept of the programming language Groovy to ease the processing of Eclipse Modelling Framework...

6th place at the Dynamic Languages Shootout at OOP 2008

The challenge was to implement Scrabble® in a dynamically typed programming language. I used Groovy and Grails.

Eclipse BugDays 2007

I participated at Eclipse BugDays in July, August, September, October, and November 2007 and helped debugging the Eclipse projects JDT, PDE/UI, and ECF.

Fraud Detection with Artificial Intelligence

From 1999 to 2004, I collected information on the topic of ‘Fraud detection’ on my website. When I started this in 1999 as a research assistant at the University of...

Geometric algorithms in Haskell

In my diploma thesis I investigate functional programming and geometric algorithms

Graphics programming in c't

Programming TrueColor graphics with the Diamond Speedstar 24x