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Diary, February 2016

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Tuesday, February 2, 2016


At 14:42, I bought the following three books from chariy shop Het Goed:

Sunday, February 7, 2016

Alone with My World

I finished reading the book Alleen met mij Wereld (English: Alone with My World) by Wessel Broekhuis, which I started reading on February 1. I bought this book on Saturday, August 4, 2012. At the time of writing the author was sixteen years old. At the age of four he was diagnosed with Asperger syndrome. The books has made me doubt my own ideas about being in the autism spectrum.

Minimal touching

In the past week, I worked on a program for finding minimal touching solutions for the Chinese Wooden Puzzle, which is based on an earlier version of the program. First I worked on a version that would extend partial solutions such that pieces of the same colour are always connected, because I thought it would be easier to do the counting of extra touchings introduced. However, this algorithm did not find all solutions that it should find, a bug that would require some serious work. Then, I went back to the previous program, when I realized that there was a way of doing the counting of extra touching in the complicated case. I verified the program in a number of steps and made some additional improvements, but in the end it turned out that it was not much faster than the previous program and thus would not make it easier to find minimal solutions. I ran the program for about ten hours to find a solution for the 15 by 10 puzzle with only fourteen extra touchings. It did not return a single solution. An attempt to find a solution with zero extra touching, did not make much progress, while it is very likely that such a solution should exists and that the algorithm should skip many branches of the search tree.

Structure 1 by Teodora Ionescu

At 21:35, I arrived at TETEM art space to collect Structure 1 by Teodora Ionesca, which I had bought on January 9. Structure 1 resembles the first part of Thoughts, which is made on linden wood. Seems like it is a study for this work.

Monday, February 8, 2016

Chinese New Year

Today is the first day of the year of the goat according to the Chinese calendar. The spring festival has begun.

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Tuesday, February 16, 2016

Predicting number of solutions

I am trying to find a 'simple' rule for predicting the number of solutions for various combinations of two non-overlapping polygon triangulations, where the number 1 and 2 assigned to triangles give, when added modulo 3 give the same numbers at all vertices on the polygon. This is related to the Four colour theorem. The patterns were generated with of a program and some JavaScript. It seems that more symmetric patterns have a higher number of solutions.

Remark: On April 23, I added colouring of certain regions, with the idea that these could be a clue to the riddle

Thursday, February 18, 2016


At 10:22, I bought the following books from charity shop Het Goed:

Saturday, February 20, 2016


At 11:35, I bought the publication Geënt op Bosch by Els Hoek and Sjarel Ex for € 10.00 from Antiquariaat Frans Melk. It contains a reproduction of a work by Peter Struycken

Sunday, February 21, 2016


I biked around the city this afternoon, but it was only on my way home that I realized that I one of the few people having a car who chose to take the bike instead. The combination of rain and wind is not ideal weather for biking. I biked about 19.6 Km (12.2 miles). (The route I biked in Google Earth: KML file or in Google Maps.) I first visited TETEM art space and looked at the exhibitions. First, I looked at AKI Electrique in Medialap. Next, I looked at some short film about a girl who visits her father, who smokes weed, and complains about school: she want to be an individual, but not be all on her own. Last, I looked at Apprentice/Master: Glitch with master artists Patrick Mangnus and Henny Overbeek. I was not very impressed.

I was rather tired when I arrived home and did not start cooking immediately. I made kail hotchpotch. I used 600 gram of ready sliced potatoes. I did not have a smoked sausage. I did used bacon pieces, a red union, a clove of garlic, slice of ginger and a little sambal. I also added some turmeric and cumin. I used a little milk and added gherkins on the dish.

Thursday, February 25, 2016


At 17:50, I bought Eindexamencatalogus 2008: AKI/ArtEz Academie Voor Beeldende Kunsten Enschede : AKI Jaarboek 0708 edited by Peter C. Sonderen, ISBN:9789075522334, from charity shop Het Goed for € 2.50.

Friday, February 26, 2016


At 11:32, I bought the following three books from charity shop Het Goed:

This months interesting links

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