Dutch / Nederlands
Site map

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.

Sunday, April 30, 2017


Saturday, April 29, 2017

De Figuranten

This morning, I finished reading the book De Figuraten (the Dutch translation of Imperial Bedrooms) by Bret Easton Ellis, which I started reading last Saturday. (I bought the book on Saturday, August 4, 2012.) I cannot deny that I got drawn into the story, but it lacks the realistic and literary style of Less Than Zero. The story does not come to me as real in any way, and thus did not have the impact that the former book had.

Thursday, April 27, 2017

Biking around Ensched

I biked to Enschede Airport Twente to see the arrival of HB-JMK, an Airbus A340-313X, on its last flight, Flight LX5180, in order to be taken apart here in Enschede. Arrived just in time. It was quite busy. I wanted to find a spot near the start of the runway, but when I realized that I was on the side of the runway, it was too late to change places. I started my notebook FJF2 and ran dump1090 to track the plane. The programs listed a lot of planes, more than I had ever seen, so I had to restart it several times to see the information about the flight I was interested in. Maybe I should have logged the datat to a file for further analyses. Above a picture of the moment the tires touched the airstrip for the first time. I also took some pictures of the approach (one of them). After the plane landed, I biked around the airstrip and took some pictures (one of them) while the plane was being taxied. Afterwards, I biked around, visiting Li-Xia at the nursing home. I made a KML file for Google Earth of the route that I biked (view in Google Maps). It also includes the last part (within the Netherlands) of the track of the plane.

Tuesday, April 25, 2017

Think Like an Artist

I finished reading the book Think Like an Artist: ... and Lead a More Creative, Productive Life by Will Gompertz. I started reading the book on April 5 after I bought it on April first. It was in interesting read, but not very revealing. Many of the things he described, I already recognized in my work as a software engineer, both professional as for leisure, because it is a highly creative job where you challenged to find solutions to often complex and/or new problems. I was a little disappointed about the fact that Gompertz mainly deals with figurative art and not much about modern art. He does mention some modern artists, but does not discus their works in detail. I am not sure if my life will be more creative and productive now.

Monday, April 23, 2017


Sunday, April 23, 2017


Our magnolia does not look very good. Many of the leaves have turned brown. Last week it was quite cold for the time of the year. The temperature drop below -4 degrees Celsius, at even below -9 degrees at ground level (10cm) on April 20. I am afraid that the leaves will not recover and that I will have to wait for new leaves to appear. I guess that the tree/plant will recover. It seems that the small magnolia plant has died after it leaves fell of during a similar cold period last year.


Saturday, April 22, 2017

Less Than Zero

This morning, I finished reading the novel Less Than Zero by Bret Easton Ellis, which I started reading on March 5, the day after I bought it. I read the book in tandem with the Dutch translation Minder dan niks, which I bought on Saturday, August 4, 2012 and finished reading this morning. It was an interesting experience to read the books in tandem. I had hoped it would increase my knowledge of English, but I am not sure if it did. However, I did notice that I sometimes did not remember having read something in the other version, probably caused by the fact that my thoughts were wandering away at that moment, and thus not consciously reading the text. With respect to the contents of the book, I would advice not to read it, because it contains some rather shocking things. The book has a very autobiographical sense, probably due all the causual remarks that the author makes about events that took place, and which are hard to imagine, if you would not have experienced them yourself. I wanted to finish reading the book, hoping that it would contain some positive twist, which, I could have guessed from the title, was not the case. In the back of Dutch edition the first sections of Figuranten (the Dutch translation of Imperial Bedrooms), which I did read. Now that I have started reading the book, I am afraid that I am going to finish it as well, because I boought it together with Minder dan niks.

Friday, April 21, 2017

The grass is not green

When I say: the grass is not green, I do not mean that it is yellow due to drought. It is also not meant as a contradition to the statement that grass is equal to green, acknowledging the fact that grass is more than just being green. It means that grass does not have the property of being green. There is nothing green in grass, as grass is just made up of atoms. Yes, grass does have the property that under certain light conditions (those similar to produced by the sun as filtered by the earth atmosphere) it reflects a certain spectrum, which (in most people) excites certain cones in the human eye, producing a certain excitation of nerves in the eye, resulting them to fire in a certain pattern. The colour green, as we experience it, is an illusion created by our brain. Some people, with a type of red-green colour blindness, see red and green as the same colour. One could say that they are only able to see yellow-orange and blue, as opposed to normal people who can see green, red and blue. Probably, these people are not able to imagine the colours red and green, like we are not able to imagine a fourth colour. It is possible, that the colours we preceive are completely individual and that nobody 'sees' the world like we see it. Bellow a processed image of a picture where I have averaged the red and green channels, which gives an impression of who people with red-green colour blindness could see the world.

(If this looks like a normal picture, try opening this page throught http://www.iwriteiam.nl/index.html.)

Wednesday, April 19, 2017


At 10:57, I bought the book Blink: The Power of Thinking Without Thinking written by Malcolm Gladwell in English and published by Back Bay Books on Saturday, March 3, 2007, ISBN:9780316010665, from charity shop Het Goed for € 2.95.

Saturday, April 15, 2017

In the city

I have been away most of the day. I got up early and at eigth I was at the supermarket to buy my weekly groceries. On my way to Li-Xia, I went to Laura (from All Laura, to pick up the meditation pillow that I had ordered. After having visited Li-Xia, I went to the hairdresser to have my haircut. It has been over nine month ago that I had a haircut. Recently, I have noticed that my hair stays at a certain lenght, probably due to the hair failing out before they grow any longer.

Next I went to Concordia to see the exhibition How on earth should this be art? with Tinkebell as curator. I bumped into the mobile named "Pig Heaven, installation, 2017" by Sjef Meijman, which made the mobile move. I went to the second floor to look at the exhibition of the B93 art collective. They were still building up the exhibition for the opening later in the afternoon. I went to see the rest of the How on earth should this be art? exhibition. I view the pedigree of the chickens by Koen Vanmechelen. The final rooster of the breeding program with chickens from all over the world, looked impressive. I noticed that after twenty minutes the mobile was still moving very slightly. I was impressed by the work "Little Delft Street" by Rob Scholte. Over the years he has bought home made embroidery from secondhand shops and flee markets. At the exhibition it shows sixteen pictures of the back of such embroidery representing The Little Street painting by Johannes Vermeer. It is interesting to see all the different colours of wool that were selected by the unknown women who made them.

At bookshop Broekhuis, I looked around the newly second hand books and went to opening of the exhibition with works by Hermine Sanders. In the past years, she worked with templates that she cuts out herself. I was impressed by the very realistic looking human figures that she can make by cutting paper. She also had a large number of posters on sale for just € 25.00. I immediately decided to pick on and buy it.

At TETEM art space, I talked a long time with Tom, who I had met twice before. Not so strange that I met him again, because he is doing his internship for his vocational training photography study at TETEM. He told me that he has been experimenting with Max lately. Before I left, I had a second look at the Sandim Mendes: panu terra | terra panu exhibition. I had seen it two weeks ago, but today, I was much more impressed with it. I must not have been in the right move to view it two weeks ago. I had a look at the book Making Africa - A Continent of Contemporary Design, which I found quite impressive.

I went back to city center, where I brought a short visited to the art galery Beeld & Aambeeld and also met woman I know, who was working on a painting on two garage doors of a show. To me it looked almost done, but she still pointed out some details that she was not happy with. Look, that is the right attitude for an artist.

In the evening, I visited the demonstration of a home made singing tesla coil.

Sunday, April 9, 2017

Chinese Wooden Puzzle

Last week, I dropped my Chinese Wooden Puzzle on the ground and I had stacked all pieces on the table to make sure I got them all. The other day, I decided to quickly put them in again, so I started to fill the top three rows with the yellow and orange pieces. Next I filled the bottom two rows with the green and purple pieces and quite quickly found a solution to fill the middle part with the remaining pieces. This evening, I went on to count how many solutions there are for the middle part. The program found 46,172 solutions in 1,561 patterns, all of which (not very surprisingly) are not symmetric in any direction. The program reported that there were three (suboptimal) minimal touching patterns with 29 extra. I was a little surprised that the program also reported that there were 20 patterns that are a combination of smaller patterns, meaning that there was a vertical split in the pattern. I reasoned that this could only be made with the five black pieces on one side and the red, blue, and white pieces on the other side. So, I ran the progam again. Below the three minimal touching patterns are given followed by ten of the combined patters (the other ten are made with the black pieces on the left) and fifteen randomly selected solutions:

This text is displayed if your browser does not support HTML5 Canvas.

Thursday, April 6, 2017


Tuesday, April 4, 2017

Spike-timing-dependent plasticity

Yesterday, I came along the article Learning through ferroelectric domain dynamics in solid-state synapses, which descibes the design of an intergrate circuit device that behaves similar to a synapse of a nerve cell with respect to spike-timing-dependent plasticity (STDP). STDP means that synapses that were active shortly before the nerve cell generated a spike are strengthed, while synapses that are activated shortly after the spike are weakened. Long ago, I already had thought about a way to simulate a nerve cell, but did not know that the mechanism for strengthening and weakening of synapses is so simple. Although neural networks and deep learning are hot topics, the use of STDP based neural networks are relatively rare. Today, I found the article Spike-Based Image Processing: Can We Reproduce Biological Vision in Hardware?. I also found that Simon Thorpe worked on the use of this for image recognition based on STDP, which are now being made available through Spikenet technology.


Sunday, April 2, 2017


Sunday, April 2, 2017


Saturday, April 1, 2017


At 14:05, I bought the book Think Like an Artist: ... and Lead a More Creative, Productive Life written by Will Gompertz in English and published by Penguin UK in 2015, ISBN:9780241970812, from bookshop Broekhuis for € 13.99. For the week of the book, I got the free book: Makkelijk Leven written by Herman Koch in Dutch and published by Uitgeverij Stichting CPNB in 2017, ISBN:9789059654112.

Friday, March 31, 2017

Rodin: Genius at work

I went to Groningen where I met with woman who I know through Go. We went to visit the exhibition Rodin: Genius at work at the Groninger Museum. Personally, I am more attracted to abstract art, but I have to admit that I was impressed by this exhibition. I had never realized how much of a thinker Auguste Rodin was. I also did not realize that he had people for him work on some of his most famouse works. I a sense, he was a rather modern sculputer and exploring new directions. I was also impressed by the mascularity of his male figures and the femininity of his female figures. We also saw the rather erotic statue on top of a book, mysteriously called "Ecclesiastes", probably in refering to it famous second verse of that book in the Bible.

We also went to see the exhibition of the collection of Groninger Museum. There we found Cluster 6 by Peter Struycken. I also liked Winterlandschap 1839 by Barend Cornelis Koekkoek, the works by Wobbe Alkema, and Elzenboompjes, huizen en Martinitoren by Job Hansen.

Afterwards, we walked around the city, visiting some shops: Second hand bookshop and art dealer Albert Hogeveen, Kunstkadootje, and Wirwar, a games and puzzle shop. We also sat on a bench on a small square near the entrance of the faculties of Dutch literature and law of the Universiy of Groningen. At the market we got some vegatables and prepared us some meal. In the evening, we visited the bar where the members of the Go club from Groningen come together to have some drinks and play a game of go, if they are in the mood. I had to leave rather soon, in order to catch the forelast train home. That was a good decision, because the transfer at Zwolle was very tight, and I might have missed it if I had not ran. I made a KML file for Google Earth of the route that I walked in Groningen (view in Google Maps).

Thursday, Maart 30, 2017


When I came home, about half of the flowers of our magnolia had opened. I took time to take some pictures. Also this macro picture shown on the right.


Monday, March 27, 2017


April 2017
March 2017
February 2017
January 2017
December 2016
Alzheimer's Disease
Trip to China 2010
-- contact --



Kabuki Syndroom


Useless lists


My life as a hacker
Signature programs
Software enginering
The Art of Programming
eXtreme Programming Programs


Hamilton cycles
cutting sticks
Califlower fractal


Volcano Blog


The email address below, may only be used for private communications. This email address may not be put on any mailing list. I do not want to receive emails with advertisements of any kind. My email address is:

Site statistics

If I did not count wrong, this site consists of 925 HTML-files with a total size of 21,558,580 characters, having 44511 internal links and 9547 external links. (About 729 of the external links are broken.) Furthermore, it contains 183 C/C++ program files with a total size of 4,231,072 characters, and 3 PASCAL program files with a total size of 35,259 characters. There are 71 text files with a total size of 770,426 characters. With respect to images, this site containts 1206 JPEG images (total size 52,645,137 bytes), 146 GIF images (total size 3,765,046 bytes), 89 PNG images (total size 2,114,941 bytes), and 2 BMP images (total size 3,727 bytes). With respect to sounds, it contains 14 WAV files with a total size of 389,002 bytes and 1 MP3 files with a total size of 70,182 bytes. It also contains 43 PostScript files (total size 308,387 bytes), 2 LaTeX files (total size 132,020 characters), 8 PDF files (total size 640,573 characters), 22 zip files (total size 2,487,335 bytes), 3 gzipped tar files (total size 52,345 bytes), 45 SGF files with a total size of 85,019 bytes, 101 KML files with a total size of 4,325,445 bytes, and 2 EXE files with a total size of 38,340 bytes. It also uses 15 JavaScript files with a total size of 619,144 bytes, This leads to a total size of 97,611,288 bytes.


Creative Commons License

I, Frans hold the copyrights of this and all other pages on this website. For this website a Creative Commons License is applicable. You may not use this work for commercial purposes. I consider all computer programs to be copyrighted by me under the GNU General Public License, unless stated explicitly otherwise. All quotes (text and program fragments) from other sources are excluded from this, and should be considered as copyrighted by their authors.

(This space is intentionially left empty)