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.
Repairing my Panasonic Lumix DMC-TZ8This afternoon, when I wanted to take a picture with my Panasonic Lumix DMC-TZ8, I got a message that the DS card was locked. When I took it out, I discovered that lock mechanism was broken. I tried to fix it with some scotch tape, but it did not work and the SD card got stuck in the camera. I was slightly annoyed by this. This evening, I decided to open up the camera. I followed some instruction videos on YouTube and managed to open it up to the SD card reader (after I had removed the SD card with force). I also opened up the SD module itself, because I wanted to see if I could disable the mechanism that detects whether the card is locked or not. (I think it is really silly that there is a switch, because I want to use the SD card to take pictures, and not use to small screen of the camera to watch pictures on some SD card that is locked.) At some point, some part of the eject mechanism jump out of place and the string attached to it disappeared. The picture on the top right shows the camera in its disassembled state. The front and back pannels are outside of the picture. I spend almost an hour looking for it, but wonder, o wonder, I found it on the floor when I had already given up. (Actually, I already had seen it, but not concluded that it could not be it.) The spring is only about 1 cm long. I spend another hour trying to put everything together including a tiny piece of wood from a tooth picker to push down the lock detecting switch. After I had put everything together, I managed with some fiddling to get the camera working with the broken SD card. I only had one little screw left. I have some idea where it should have gone, but I decided not to bother taking the camera apart again.
Seven booksAt 11:42, I bought the following seven books published by Witteveen+Bos from charity shop Het Goed for € 1.50 each:
Black MirrorIn the afternoon, I went to the opening of the exhibition Black Mirror with photographs by Jenny Boot at Fotogalerie Objektief in Enschede.
Counting Digital SheepIn the afternoon, I visited TETEM art space. I saw the new exhibition Counting Digital Sheep. Quite interesting. Especially code / coat by Jochem van Schip Artificial Dumpness, and Linger by Japser van Loenen. (Through the latter, I also found eps8266-sniffer when at home.) I also watched In the Robot Skies short film by Liam Young.
CDAt 10:14:23, I bought the CD Interstellar: Original Motion Picture Soundtrack from bookshop Broekhuis for € 9.99.
The MacMahon SquaresYesterday, I read about Jigsaw Puzzles and The MacMahon Squares on I Programmer, and decided to give it a try. My first idea was to convert the problem to an Exact Cover problem. However, it did not find any solutions. This made me think about a program that could find the best almost solution. When I finished the program, it found 46 solutions. After some debugging, I found a bug in the algorithm to generate an Exact Cover and my Exact Cover solver found the 46 solutions with a second. I combined both algorithm is one program. The 46 solutions are given below:
Friday, February 9, 2018
before. This morning, I noticed that the water was coming from one spot and I stopped to take the picture shown on the right. You can just see the water flowing. A little further on the road, there are also some wet spots, which have turned into ice due to the low temperatures of the past days.
charity shop Het Goed:
Bring Your Own BeamerThis evening, I attended the last Bring Your Own Beamer event at Tetem art space. The event was similar to last years. I occupied the same spot with an updated version of the project based on Street Tiling Patterns and a projection of a negative of an old picture of Li-Xia by the parts of the beamer that I put together last Tuesday and finished Wednesday evening. A picture of this is shown on the top right. For the Street Tiling Patterns project, I increased the speed of the animation and I removed a bug in the algorithm to find a matching pattern. There were some people from last year. One of them was Willemijn Calis. I also met Tessa Langeveld, who was showing moving forms in still spaces. A lot of people from TkkrLab came to visit and two of them had brought their own projects.
Before the visitors came at eight, I started working on the idea to pick the colours for the Street Tiling Patterns project from a limited palette as inspired by the colour palettes by Peter Struycken. At home, I continued working on this, resulting in the following palette:
BYOB preperationsThis evening, at TkkrLab, I spend some time preparing for coming Fridays "Bring Your Own Beamer" event. First I tested my notebook with a beamer to see if it worked with the updated version that I showed on last years event. Basically, I have made it run faster, because it was changing to slow to be noticed by people just giving it a short look, and I fixed a bug, which prevented one of the effects not to work properly. Next I played with some parts of an old beamer, which I found on January 24, 2017. Some other member told me that he still had the lens to go with it and showed where it fit, which made me realize that I was totally wrong about how it worked. At some point, because I did not have the right lamp, I decided to leave it for home and work a little on my notebook. At home, I did some further experimentation and got some idea of how I am going to use it.
BookAt 10:08, I bought the book Examencatalogus Yeahboek 12|13 written in Dutch and published by AKI ArtEZ on Thursday, June 27, 2013 from charity shop Het Goed for € 2.50. Later, I discovered I already bought a copy of this book on Saturday, November 18, 2017. On the front page there is a dedication by Sumchog Kersbergen, also with a line in the Devanagari script.
BookAt 10:41:44, I bought the book Atlas of Remote Islands: Fifty Islands I Have Not Visited and Never Will written by Judith Schalansky in English and published by Particular in 2010, ISBN:9781846143489, from bookshop Broekhuis for € 19.95. At 11:12:05, I bought Issue 2 of year 2007 of the Dutch art magazine Metropolis M from charity shop Het Goed for € 0.50.
13.7° CelciusBetween 14:30 and 15:00, the temperature at the closest official weather station was 13.7° Celcius, which is a record high for this day as long as records have been kept. Carina Schüring. The exhibition was held in the Old Town Hall in Neuenhaus where Carina grew-up and no lives again. The room was full of people, mostly with people from Neuenhaus. I guess, I was the only Dutch person around. But I met some Germans, especially those who studied in Enschede, who could speak Dutch. I could understand most of the introduction by Anke Baumeister. Only after about half of the people had left, I could find some time to study her new works. From a distance they often do not look that interesting, but when you come closer and closer, the more interesting it becomes. I really feel that the quality of her work has matured a lot in the past year. I feels as if she has found the quietness to search deeper.
Cordwoord puzzle tooAt TkkrLab I found a Cordwoord puzzle too in a box we received from the Electronics Research Group · University of Aberdeen. I decided to give it a try and spend the rest of the evening studying it and performing some soldering. I am about halfway and left it in my box in the space for another day.
Thursday, January 18, 2018
Some snowAround seven in the morning, I saw some snow on the cars, but not on the ground. Around eight, I saw that it was snowing. When went outside around half past eight, it was snowing. I measured 1.5 cm of snow on the table outside. Around ten, the snow already started to melt. It snowed on and off during the day. In the evening there were still some patches of snow, mostly on (high) grass.
New bikeThis morning, I went to get my new bike, a Vilo de ville B 200 in the colour apple green. Instead of a chain drive it has a belt drive, which is more durable, maintenance free, very silent, and has less friction.
You are what you doThis morning, I finished reading the Dutch book Je bent wat je doet (You are what you do) by Roos Vonk, which I started reading on December 20, 2017, the day I bought the book. Roos Vonk is a Dutch professor of social psychology. What I like about the book, compared to other self-help books, is that it contains many references to scientific experiments to support the advice that it gives. It is also a very practical book. Although I have finished reading the book, I am going to study again, trying to make a summary of the main points in order to apply them to my own life. Four colour theorem states that faces of a planar graph can be coloured with four colours. Given four colours, there are 24 ways to permute them. Because of this, there must be another method to represent a colouring with less freedom. For each planar graph with degree three it is possible to define an equivalence relationship between a face colouring and an edge colouring with three colours. Given three colours, there are six ways to permute them. Which gives reason to believe there is a more compact way to represent a colouring. And there is indeed, because with each edge colouring it is the case that at each vertex the three edges are assigned a different colour. By assigning a number to the edge colours, the colours will appear either clockwise or anti-clockwise around each vertex. This can be represented by assigning one of two 'colours' to each vertex. One could exchange these, meaning that there must still be a more compact method for representing a face colouring of a planar graph with degree three. This can done by marking the edges for which the edge colours around the vertices of the edge run in a different direction. It appears that for a marked edge, the colours of the faces on the 'opposite side' of the two vertices are always the same, while for an unmarked edge they are always different. The edge marking also has the property that each face has an even number of edges with a marking. But that is about everything that can be stated in general. Depending on the number of edges of a face, there are certain patterns of edge markings that are allowed, but there are no simple rules to describe which patterns can occur. reading the book The Philosophy of Andy Warhol by Andy Warhol, which I started reading on December 9. 2017 after I bought it on November 26. I found this a rather boring book. It is rather similar to A, A novel in the sense that it present every day talk as something special. It has long transcripts of telephone calls with B, who according to Pat Hackett is Brigid Berlin. It is definitely not about philosophy, at most about Warhol's attitude to life.
Trip to China 2010
-- contact -- Frans
My life as a hacker
The Art of Programming
HTML to LaTeX
eXtreme Programming Programs Hamilton cycles