Hobby and pet projects

This page contains an overview of my hobby and pet projects.

Project Update of my web site
Term 12/2020 - 12/2020
Role Designer, developer, tester
Description Improve design, refactor CSS, use Bootstrap 5
Tech stack Jekyll, JavaScript, HTML5, CSS3, Bootstrap, GitHub pages
URL http://blog.dinkla.net
Project Migrating Ray Tracer to Kotlin
Term 02/2018 - 11/2020
Role Designer, developer, tester
Description Refactor the Java and Groovy code to Kotlin
Tech stack Kotlin, Java, Groovy, Gradle
URL https://github.com/jdinkla/from-the-ground-up-ray-tracer
Project Migration of my blog from Wordpress to Jekyll
Term 11/2016 - 11/2016
Role Designer, developer, tester
Description Export of all post from Wordpress, import into Jekyll
Tech stack Jekyll, Ruby, SQL, Node.js, JavaScript, HTML5, CSS3, Bootstrap, GitHub pages, Disqus
URL http://blog.dinkla.net
Project Web app for visualization of the history of family names
Term 09/2016 - 11/2016
Role Designer, developer, tester
Description
  • Web app created for the culture hackathon "Coding da Vinci Nord"
  • Visualization of historical data for research of family names (genealogy)
Tech stack Java 8, JavaScript, Node.js, Express, Mocha, MariaDB, Neo4J, Angular, D3.js, Underscore.js, Chai, HTML5, CSS3, Bootstrap, Docker, Amazon Web Services (AWS)
URL http://www.dinkla.com/en/programming/javascript-familiennamen.html
Project Import and analysis of emails with Elasticsearch in a Spring Boot application
Term 05/2016 - 05/2016
Role Designer, developer, tester
Description
  • Spring Boot application with Spring MVC web Frontend
  • Import of Emails into Elastiksearch with Spring Data Elasticsearch
  • Analysis of emails with Java API, optional with Kibana
Tech stack Spring Boot, Spring MVC, Spring Data Elasticsearch, Elasticsearch, JavaMail API, Jackson JSON, Bootstrap, Plotly, Gradle, Spock, Docker, Groovy, HTML5, CSS3, Kibana
URL http://www.dinkla.com/en/programming/spring-boot-elasticsearch.html
Project Web page and email campaign
Term 03/2016 - 04/2016
Role Designer, developer, tester
Description
  • Update of web page, generation of content with Groovy Server Pages (GSP)
  • Software for email campaign from Excel address data
Tech stack Groovy, JVM, GSP, HTML5, CSS3, JavaScript, Ant, Apache POI, XML, XML Schema, Bootstrap
URL http://www.dinkla.com/
Project Book "Die komplexe Perspektive - Einführung in die digitale Wirtschaft"
Term 08/2015 - 02/2016
Role Author
Description
  • Wrote and published a book
  • Big Data, Data Science, Artificial Intelligence
  • Economy as a complex system, Agent Based Modelling (ABM)
Tech stack Dart, NetLogo, Neo4J, Voldemort, CouchDB
URL http://komplexe-perspektive.dinkla.net
Project Detection of neighbors with k-d trees, Apache Spark and Scala
Term 06/2015 - 06/2015
Role Designer, developer, tester
Description
  • Installation and configuration of a small virtual cluster with 3 nodes with Ubuntu Server 15.04
  • Configuration of Hadoop HDFS and Spark in cluster mode.
  • Implementation of k-d tree, transformations with Spark RDDs
  • Evaluation wit R
Tech stack Apache Hadoop, Apache Spark, Scala, SBT, ScalaTest, Kryo, VirtualBox, Ubuntu Server 15.04, Ganglia, R, rhdfs, ggplot2, ggmap
URL http://www.dinkla.com/en/datascience/lbnn.html
Project Evaluation of multi GPU computing
Term 03/2015 - 04/2015
Role Designer, developer, tester
Description Evaluation, example code and teaching material
Tech stack C++ 11, NVIDIA CUDA, OpenCL, C++ AMP, XCode, Eclipse NSight, Intel INDE
URL http://www.dinkla.com/en/programming/gpu-heat-diffusion.html
Project Parallel ray tracer with DSL for describing scenes
Term 01/2010 - 06/2015
Role Designer, developer, tester
Description
  • Continuation of the optimization of a ray tracer with parallel processing
  • Porting the C++ code to Java
  • Made the code more object oriented
  • Made the code thread-safe for parallel execution
  • Created a Groovy DSL for easy scene creation and manipulation
Tech stack Java, Groovy, Ant, Gradle
URL http://www.dinkla.com/en/programming/groovy-rendering.html
Project Performance optimization with parallel processing
Term 02/2009 - 12/2011
Role Designer, developer, tester
Description
  • Optimization of a ray tracer with parallel processing (SIMD, MIMD)
  • Architecture 1: Cell Broadband Engine (Playstation 3)
  • Architecture 2: NVIDIA CUDA (graphics board, GPU computing)
  • Architecture 3: ForkJoinPool of Java 7
  • Architecture 4: OpenMP
  • Design and implementation of parallel algorithms and data structures
  • Performance optimization
Tech stack C++, NVIDIA CUDA, GCC, OpenGL, Java, OpenMP
URL http://www.dinkla.com/de/programming/parallel-raytracer.html
Project Game similiar to Scrabble, contribution to Dynamic Languages Shootout 2008
Term 12/2007 - 12/2007
Role Architect, designer, software developer, tester
Description
  • Contribution to the "Dynamic Languages Shootout" for the OOP 2008 organized by JavaSpektrum
  • Result: 6th
  • Searching with Artificial Intelligence
  • Design and implementation of complex algorithms
  • Performance optimization of Java and Groovy programs
Tech stack Groovy, Grails, Java, OOA, OOD, JUnit, Spring MVC, Hibernate
URL http://www.dinkla.com/en/programming/groovy-shootout.html
Project Groovy UML2 builder
Term 11/2007 - 11/2007
Role Designer, software developer, tester
Description Simplification of the usage of UML2 with Groovy
Tech stack Eclipse, Groovy, Java, Eclipse Modeling Framework (EMF), domain specific languages (DSL), UML, UML2, MDT-UML2
URL http://www.dinkla.com/en/programming/groovy-uml2.html
Project Groovy application for showing disc usage
Term 06/2007 - 06/2007
Role Designer, software developer, tester
Description Written during learning Groovy
Tech stack Groovy, Java, Swing, AWT, JFreeChart
URL http://www.dinkla.com/en/programming/groovy-diskusage.html
Project Groovy EMF Builder
Term 04/2007 - 06/2007
Role Designer, software developer, tester
Description Simplification of the usage of EMF with Groovy
Tech stack Eclipse, Groovy, Java, Eclipse Modeling Framework (EMF), domain specific languages (DSL)
URL http://www.dinkla.com/en/programming/groovy-emf.html
Project Eclipse-Editor of Common Warehouse Metadata Model (CWM)
Term 01/2007 - 01/2007
Role Designer, software developer, tester
Description Eclipse plugin for experimenting with CWM
Tech stack Eclipse, Eclipse Modelling Framework (EMF), XSLT, Common Warehouse Metamodel (CWM), Meta Object Facility (MOF), UML, EMOF, Ecore, OMG Standards, Java, Eclipse plugin development (PDE), Metadata
URL http://www.dinkla.com/en/programming/eclipse-cwm.html
Project Editor and viewer for family trees
Term 04/2005 - 04/2005
Role Designer, software developer, tester
Description
  • Private project, prototype
  • Written during learning Eclipse, EMF and GEF
Tech stack Eclipse, Eclipse Modeling Framework (EMF), Graphical Editor Framework (GEF), Java, Eclipse-Plugin-Entwicklung (PDE)
URL http://www.dinkla.com/en/programming/eclipse-gef.html
Project SQL Editor Prototype for Eclipse
Term 02/2005 - 04/2005
Role Designer, software developer, tester
Description Written during learning Eclipse
Tech stack Eclipse, SWT, Java, Eclipse plugin development (PDE)
URL http://www.dinkla.com/en/programming/eclipse-editor.html
Project Metadata driven ETL development with Eclipse
Term 12/2004 - 04/2005
Role Designer, software developer, tester
Description Generating DLL scripts and import/export-scripts from metadata
Tech stack Written during learning Eclipse and EMF
URL http://www.dinkla.com/en/programming/eclipse-emf.html