Jannis Pohlmann Personal website

Jannis

I am an open source enthusiast, student and musician from Lübeck, Germany. In my free time I enjoy hacking on Xfce and Lunar Linux. I've been a member of both teams since about 2005. Besides developing software, I love to listen to and play music (Guitar, Bass and Drums) and hang out with friends.

Contact me via jannis@xfce.org. My public PGP key is 0x354AFBA6. You can download it from here.

My CV is also available for download.

Tag - graduation

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Friday, December 2 2011

Joining Codethink

I already hinted at the end of my studies in earlier posts related to my thesis. After submitting that thesis I moved 400km south of Lübeck to enjoy a few quiet weeks, record music and work on Xfce. However, I only stayed there for two weeks before I was set to fly over to Manchester, UK. The reason: I will be joining Codethink in January!

Having spent the last three weeks in and around their office, the city of Manchester and one of its suburbs, I can confidently say that this was a great decision. Codethink is a social and diverse company with a strong background in open source, with bright people, and a nice overall atmosphere and attitude. We had plenty of enjoyable evenings, chats, not to forget the brilliant food. I managed to feel at home already, but sadly, I had to leave again yesterday.

Like many people in Codethink, Manchester appears to be a city that likes music, a place where almost everyone is either a die-hard music fan or even a musician. I found a room right in the hart of the northern quarter at 10 minutes walking distance to the office, surrounded by record shops, live music venues and pubs. Rehearsal spaces are expensive but nearby. I could list various additional reasons for why I’m really happy. This simply is a good move.

About three years ago I was about to cancel my studies and look for a job. In the end I decided to carry on. Last week my Diplom (the German equivalent of an MSc) certificate arrived. Despite many doubts throughout these years, I managed to graduate with honors. It’s funny that this grade will have no impact on anything and is only really useful for proving to myself that I can pull through if I really want to. But then again, I had a great and chilled time being a student. So in retrospective, I guess I only ever had doubts because I was impatient and eager to make a difference in what was assumed to be the “real world”. 

Now, with Codethink, I can.

Monday, October 17 2011

An introduction to drawing graphs with TikZ/PGF, Part 3

This post is the last in a series of articles about PGF/TikZ and its new graph drawing features on which I am working as part of my graduate thesis.

In the previous two posts I gave an introduction to graph drawing, the graph syntax of TikZ and its Lua-based graph drawing engine that can be used to implement automatic graph drawing algorithms and use them to compute layouts for graphs that are to be rendered with TikZ.

For this post, my intention was to demonstrate the algorithms that I implemented as part of my thesis. These algorithms work well with many graphs, including grids, symmetric graphs, flow charts, flow networks and state machines or automata.

However, I decided to just point to the final version of my thesis here. It documents the algorithms extensively and gives many examples of how to use and tweak them. I think the thesis holds information much more useful to users and graph drawing researchers than what I’d be able to put in a regular blog post.

So, here is the official link: 

http://www.tcs.uni-luebeck.de/downloads/papers/2011/2011-configurable-graph-drawing-algorithms-jannis-pohlmann.pdf

If you find mistakes, please keep them to yourself. It still has to be marked by the two reviewers, so I don’t want to know what I did wrong yet. ;)