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I write, therefore I am

With this variation on a famous statement by the philosopher Descartes, I would like to express that the act of writing about what happens in my life is important to me.

Tuesday, November 29, 2016


Monday, November 28, 2016

Disc extract script: SVG

I extended the script from last Thursday with a procedure to produce a SVG file that gives a representation of the disc as found by the script.

Sunday, November 27, 2016


I visited Tetem Art spaces. Here I first watched the exhibition All is transformed, which I did not find very interesting. Next I experienced We Are Never Ever Ever Getting Back Together again. There was now a push button at the entrence to start the installation. Next I went to The Overkill Festival, but when I heard that the ticket costed 10 Euro, I immediately decided to leave, also because I did not plan to stay very long. At bookshop Broekhuis, I met with René Völker, who has an exposition of his painting at the top floor. We talked for a long time. He gets the inspiration for his painting by playing with Lego bricks. I find his works quite interesting. At last, I went to the pop-up gallery, which just opened yesterday and has works of about twenty different artists from the region. I found the following noteworthy:

Saturday, November 26, 2016

Bookshops in Utrecht

From the railway station, I walked through the streets Voor Clarenburg and Mariastraat to bookshop De Wijze Kater, which appeared to by a new age type of bookshop, which with a passage is connected to another shop selling singing bowls, incense and such. They had a whole shelf with books by Osho, which were all quite expensive. Next I went to small Stach food shop to collect a food bar that came with the city trip train ticket that I bought. I walked under the Dom Tower, and considered the option to climb it, as the sky looked quite clear and because it had been such a long time ago that I climbed it. (I remember having climbed it with Li-Xia when she was pregnant with Annabel, which was 22 years ago.) I did walk through quadrangle besides the Dom church, a place with special memories for me. Next I went to bookshop Steven Sterk, which has a lot of ramsj. I bought a small book as a present for one of my sisters. After I brought a short visit to bookshop Aleph, I visited Broese Boekverkopers. Not much has changed since the last time, I visited this bookshop more than four years ago. I did not buy any book.

Thursday, November 24, 2016


At 14:41:54, I bought the book Khomeini, Sade en ik written by Abnousse Shalmani, written in Dutch, published by De Geus - Oxfam Novib in 2015, translated by Jan Versteeg from Khomeiny, Sade et moi written in French, ISBN:9789044534504, from bookshop Broekhuis for € 9.95.

Disc extract script

On November 8, there was a laser cutter workshop at TkkrLab where someone brought an image of a cardboard disk for an old music playing box, with the question whether it could be cut on the laser cutter. It turned out that it was rather hard to transform the image into a clean SVG file that could be laser cut. This was due to the poor contrast and the shadows cast by the cardboard. The music playing box is from around 1900. I found some information in the "Instrumenten Kabinet" document under number 581. I have been working on a script for the MySample editor in the mean time. (I had to make some modifications to MySample to add functions for the sine and cosine.) One of the problems proved to be to find the center of the disc. I introduced a method that searches for the optimal value searching from an initial point. I still have to add the part that generates an SVG files, but that is relatively easy, now that it can output a list of notes on each of the sixteen tracks. The script uses a one tenth degree resolution to determine the start and end of each note. Below a scaled down version of one of the result images generated by the script:


Saturday, November 19, 2016

AKI open day

Together with Andy, I paid a short visit to the open day of the AKI. We were greated by a cheerful student asking us whether we wanted some information about the workshops being given and offered us a drink voucher. I declined both. It was interesting to look around all the studios. We saw some students working with pots turntables. I also discovered they have some wood and metal workshops. I discovered that the rooms that are used as exhibition rooms during the final examinations, are actually in use by the students as their workrooms, and were filled with half finished works of art. I would have loved to spend some hours looking around, but Andy was dragging me around, and indication that he rather wanted to go home. At the library they were selling examination catalogues, which I have been collecting, for three Euro each or four for ten Euro. Around 12:02, I bought the following four examination catalogues for € 2.50 each:
  • Eindexamenwerk 1984 edited by Johan Ghijsles, Julius Visser, and Hans Vollenboek, written in Dutch, published by AKI Enschede in June 1984.
  • Eindexamenwerk 1985 written in Dutch, published by AKI Enschede in 1985.
  • Eindexamen 2004: AKI Akademie Voor Beeldende Kunst Enschede written by Kees t' Hart edited by Peter C. Sonderen and Wouter Hooijmans, written in Dutch, published by AKI akademie voor beeldende kunst Enschede in 2004, ISBN:9789075522235.
  • AKI 06/07 edited by Philipp Gieseler, Wouter Hooijmans, Malt Rettberg, Peter Sonderen, and Anne Tol, written in Dutch and English, published by AKI, ArtEZ academie voor beeldende kunsten Enschede in June 2007, ISBN:9789075522297.


Wednesday, November 16, 2016


At 11:48, I bought the book The Mating Mind: How Sexual Choice Shaped the Evolution of Human Nature written by Geoffrey Miller, written in English, published by Vintage in 2001, ISBN:9780099288244, from charity shop Het Goed for € 1.95.

Tuesday, November 15, 2016


Monday, November 14, 2016


This evening, I went to see the movie Arrival. Quite an interesting experience. I did not find it very scarry. It would indeed be very interessing if the events as depicted in the movie would occur. It would definitely help humanity to rise above its current state. It is advicable, as usual, not to watch the trailer. I saw the trailer, but it was many months ago, so I had forgotten most of it.

Sunday, November 13, 2016


This afternoon, I went to ETEM art space and there I experienced and enjoyed We Are Never Ever Ever Getting Back Together, a light and sound installation by Doron Sadja, about which I cannot see much if you have not experienced it yourself. I also watched the video about the work, which, as is often the case, did not reveal much. I looked around the graphics exhibition, and as happened before when I revisit an exhibition with works from many different artists, I noticed some works that I did not remember having seen before, while I definitely must have seen them. In a corner of the reception hall, I noticed audio-DH with many wierd, but also interesting sound fragments. I found the fragment by Mariska de Groot interesting enough to listen till the end. I think about buying the physical edition.

Tuesday, November 8, 2016


Tuesday, November 1, 2016


Today is my birthday, but I am not going to celebrate it with family and friends, because on August 4, I celebrated that I was 20,000 days old.

At the end of the afternoon, I went to the Imaginary exhibition in the top of the building Horst at University of Twente, which is about (the visualization of) mathematics. Quit interesting, although I did not learn much news, but it was fun to play with the tiles and make periodical and aperiodical tilings. I talked with the two math students that acted as hosts. At the end they gave me a free catalog.

Fractal Jigsaw: SVG

In the evening, I wrote a program to figure out how to the basic fractal form of the Fractal Jigsaw puzzle using SVG can be generated. Below the result showing three shapes with increasing size, using the same algorithm with more recursion:

Sunday, October 30, 2016

Fractal Jigsaw

Some time ago, I came across this video by Oscar van Deventer about Fractal Jigsaw puzzle. I spend some time investigating the design with the idea of creating one myself. In the past weeks, I spend some time writing a program to generate all possible puzzles. I have not fully completed this attempt. Today, I spend some time figuring out how to generate the fractal that is being used. I discovered that the design of the puzzle is based on the design on the left presented on Bridged Polyamonds. On this mathpuzzle page there is a link to the design of the Fractal Jigsaw puzzle with a matching colouring of the pieces. During the afternoon, I made the following drawing:

Saturday, October 29, 2016

Peter Vink

This afternoon, I saw the lastest work (installation) of Peter Vink in the main exhibition room of Concordia art exhibition center. In the past four weeks he worked on constructing the installation, which consist of strippes hanging on thin wires from the ceiling. The stripes have the size of the tiles used for the parquet of the floor and also follow the pattern of the parquet. There are in hanging in ten horizontal layers, filling the space that is restricted by the windows, windowsill, and back of the room. His art works, which are very different in style, are always made around the space in which he creates them. This work (installation) will be another four weeks on display in Enschede. It was interesting to talk to him. He also visited the exhibition of Levi van Veluw, which I saw two weeks ago.

Wednesday, October 25, 2016


Tuesday, October 25, 2016


Monday, October 24, 2016

Tetem: Month of graphics

In TETEM art space, I went to see the exhibition as part of "Month of Graphics". Works I found worth mentioning are:
  • Beukenbos (1/25) and Buiten de oevers (8/25) linocuts by Elsbeth Cochius.
  • Without title (11/65) screen print from 1982 by Jo Niemeyer
  • Aleutian Islands linocut in four parts 3/6 by Frans Baake.
  • Without title (6/6) linocut from 1978 by Cees Andriessen.
  • Without title (25/60) screen print from 1976 by Ewerdt Hilgemann.

Saturday, October 22, 2016


Tuesday, October 18, 2016


Saturday, October 15, 2016


I went to Amsterday. I first went to bookshop Scheltema. There, at 11:39, I bought a Moleskin daily planner for 2017 for € 18.90. I spend some time looking around and when I noticed that Jonathan Safran Foer was going to give a book signing session started at 13:00 for his new book Here I Am, I decided to wait. I contemplated whether I should tell him about my research with respect to the number sequences in Extremely Loud & Incredibly Close, but concluded that if he were truely interested in this, he might already have contacted me. There was a long line of people waiting for their book(s) to be signed.

I went over andriesse - eyck gallery where I met with Peter Struycken. At that moment, it was rather quiet. I only stayed a short time, and went to La Place to collect some lunch items that were include in the train ticket that I bought. After this I walked around. I paid short visits to Mendo and Boekie Woekie on my way to Ron Mandos to visit the exhibition The Monolith by Levi van Veluw. Impressive, especial the dark room, which give you the feeling to be in another world.

I walked around the area and brought short visits to two other galleries, before returning to andriesse - eyck. There I spend a long time looking at the new series of painting by Peter Struycken. I think that Articulatie van kleur 04-feb-2016 is my favourite. Also meet with Carel Blotkamp and later with Walter Lewin and his wife.

Friday, October 14, 2016


Wednesday, October 12, 2016


Wednesday, October 5, 2016


November 2016
October 2016
September 2016
August 2016
July 2016
Alzheimer's Disease
Trip to China 2010
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