29. July 2014

Bouldering the Vauxwall in Vauxhall

Finally gotten around to check out Vauxwall, a newly opened bouldering centre in London. We were pleasantly surprised by finding nice bouldering areas in a few railway arches near Vauxhall. Even better, we had the place basically for us – no one else there, what a luxury.

28. June 2014

It's a long road: Marathon through Hyde Park

How is it to run a marathon? Having asked me this question often enough, I decided to settle the matter and run laps in Hyde Park until I either give up or finish. No starter fees. Without time limit. Lessons learnt from a long journey.

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21. June 2014

Motion Segmentation of RGB-D Videos via Trajectory Clustering

Persistence paid off. The little, remaining work on my Master’s thesis at KTH is finally completed. I can hardly remember touching a subject at university that was as demanding and as satisfying as the research on how to segment moving objects in videos taken by a RGB-D camera. Thanks to everyone who helped me with this mission.

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19. June 2014

Bike to work? Run to work.

It’s 5.5 kilometers for me to my workplace in London. I took my running shoes instead of public transport. And I will do this again. The idea is not new, though – and people are already shouting on the web for making running to work tax-deductible. But it’s not tax that matters. It’s trading commuting time against exercise.

10. June 2014

No umbrella needed: Riverside impressions of London

Impressions from a riverside walk with a friend. This is “proof” for all my friends who had expressed doubt on the weather in London before I left to live there. Besides, I don’t even have an umbrella.

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12. May 2014

Mountain View: a cyclist's point of view

Mountain View in California is a place where cars are the primary means of transport. But I was told that biking is an option, too. So, I tested getting around with a bike. Here is a short review.

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10. May 2014

Preview: Motion Segmentation of RGB-D Videos via Trajectory Clustering

Humans are quite good at detecting motion. How about machines? Can computers automatically segment objects in videos? I dedicated my Master thesis to a particular variant of this question. Here are a few videos as a preview.

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25. April 2014

No cars for students in Cambridge

Cambridge is a bicycle-friendly city. And as I have learned recently, students at Cambridge University are usually not allowed to keep and use cars.

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21. April 2014

Fixing a Shimano EF50-8R bicycle shifter

For some reasons, the front shifter of my bicycle stopped working properly. Time to take a screwdriver and see how the shifter actually works.

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12. March 2014

Goodbye, Sweden. Goodbye.

Everything has an end. Such has my student life in Stockholm. The last days give me a chance to sum up my roughly twenty months in Sweden.

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22. January 2014

Åland – Ice-skating in Finland

From Sweden over the Baltic Sea to Åland in Finland for an afternoon of ice-skating. Waiting for us were beautiful frozen fjords. How come so few students are interested in this hobby?

20. January 2014

Skridskoglädje på Tämnaren

Äntligen var det dags att sätta på sig skridskorna. Tillsammans med klubben gick det på en solig lördag norrut från Stockholm för att åka skridsko på Tämnaren, Upplands största insjö. Den mörka årstiden lyser verkligen upp när isen lagt sig. På riktigt.

7. January 2014

Programmer-friendly German keyboard layout on GNU/Linux

German keyboards are usually pretty annoying for programming. Mapping the third-level of the buttons D, F, C, V to {, }, [, ] places the curly braces and brackets at more convenient locations without destroying much of the benefits of a German keyboard.

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7. December 2013

Dunedin's Finest View: Harbour Cone

The name says it: Harbour Cone is a cone-shaped hill on the Otago Peninsula in New Zealand. While most tourists pay for a tour to see penguins and albatroses, I opted for the cheap variant using a regular bus and regular hiking boots.

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7. December 2013

Among the Clouds – Roys Peak

Just when reaching the summit, a gap in the clouds allowed for a stunning view from Roys Peak in New Zealand: blue lakes, green vegetation, snowy mountains. A report from a moderate hike with an above-the-average return.

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20. November 2013

Case study: when average speed matters

This case study shows the effects of acceleration, top speed, deceleration on total travel time on short distances at the example of Transrapid in Shanghai. Bottom line: it is the average speed that matters, not the top speed. Groundbreaking result … no! But it is an illustrative example with concrete numbers that shows why reporting top speeds creates illusions.

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18. October 2013

Recursive circle packing with PostScript

Ten lines of PostScript are sufficient to draw a pretty self-similar pattern constructed by packing circles into circles.

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29. September 2013

A runner's self-experiment: Lidingöloppet 2013

The annual racing series on Lidingö is extremely popular and was booked out way in advance this year. Out of curiosity (and because I succumbed to the excellent marketing), I took part amongst thousands of others in the 30km race on Lidingö. Here is a review of the event.

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8. September 2013

Akka from Kebnekaise

A wonderful journey through Sweden. Great weather conditions. Kebnekaise, Sweden’s highest mountain called. A story both with pictures and with words.

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1. September 2013

Zwischenbericht von der KTH: Über Versuchskaninchen, Double-Degree, Kurswahl, Nerdvokabular und den Polarkreis

Den gibt es nur auf deutsch: meinen Bericht vom ERASMUS-Jahr im Rahmen des neuen Double-Degree-Studiums zwischen den Informatikfakultäten der Technischen Universität München und der Königlich Technischen Hochschule Stockholm.

22. August 2013

Across Sweden from Kungshamn to Stockholm by Bike: Day 5

Across Sweden with the bike from the west coast to the east coast? I have tried my luck. Here is a report about the last day – from Torshälla to Stockholm.

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22. August 2013

Across Sweden from Kungshamn to Stockholm by Bike: Day 4

Across Sweden with the bike from the west coast to the east coast? I have tried my luck. Here is a report about the fourth day – from Mullhyttan to Torshälla.

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22. August 2013

Across Sweden from Kungshamn to Stockholm by Bike: Day 3

Across Sweden with the bike from the west coast to the east coast? I have tried my luck. Here is a report about the third day – from Mariestad to Mullhyttan.

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11. August 2013

Across Sweden from Kungshamn to Stockholm by Bike: Day 2

Across Sweden with the bike from the west coast to the east coast? I have tried my luck. Here is a report about the second day – from Vänersborg to Mariestad.

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11. August 2013

Across Sweden from Kungshamn to Stockholm by Bike: Day 1

Across Sweden with the bike from the west coast to the east coast? I have tried my luck. Here is a report about the first day – from Kungshamn to Vänersborg.

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