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.
Genius at PlayI finished reading Genius At Play: The Curious Mind of John Horton Conway by Siobhan Roberts, which I started reading on November 2, the day after I received it as a birthday gift. I very much enjoyed reading this book, first of all because of the subject of the book, John Conway, but also because of how the book is written.
Turner and photographsToday, Conny and I went to see the Danger & Beauty - Turner and the tradition of the sublime at Rijksmuseum Twenthe and the various places where the "Fotomanifestatie Enschede 2015" was held.
Secondly, we went to Rijksmuseum Twenthe. It was quite busy at the Turner exhibition, which also contained many related artworks from the same and later periods. We saw the following works by Joseph Mallord William Turner:
Next we walked to the city center. There we looked at photographs at Galerie Objektief with the exhibition Buried Dreams with photographs by Willem van Dijke, Galerie Beeld & Aambeeld with photographs by Alex Timmermans, and Concordia with photographs by Martijn van de Griendt.
Books and wet snowAt 17:10:09, I bought the following books from bookshop Broekhuis:
When I left the shop, there was wet snow falling from the sky. Also when I biked to my office in the morning, there was some very small wet snow, which stayed a little on my coat.
BookAt 13:08:57, I bought the bookDe Ontdekking van Moskou by Harry Mulisch, ISBN:9789023496960, from bookshop Broekhuis for € 19.90. This is a posthumous novel based on his third of six (or seven) versions of a novel that Mulisch never published. Parts of other versions have been published, which I compared in the past and about which I wrote a page in Dutch. I will have to update that page now with this newly published version.
Chinese Wooden Puzzle: White, orange, yellow, and redIn the past weeks, I worked on an alternative implementation for finding solutions to Chinese Wooden Puzzle resulting in a new program. The previous implementation would find a cell with a low number of piece placements and try all those placements. The new implementation each time selects a piece and tries all the placements for this piece. I tested this on the number of solutions inside a 8 by 10 frame using five of each of the white, orange, yellow, and red pieces. Today, the program found 23 solutions, which is three more than the 20 solutions found on Wednesday, May 21, 2013. In the coming weeks, I will continue verifying the earlier results with this new implementation, and I expect that it will find more solutions for the other problems as well. The 23 solutions are presented below:
#DATA Hackethon - endI arrived around 9:15 but only continued working on my program around 10. Around noon, I decided to stop and instead worked on some advice in which I suggested that deep machine learning techniques like TensorFlow might be usefull. I also spend some time talking with one case owners about these ideas. I also retracted from the contest. At 15:00, the 24 hours of the Hackethon was over and the teams started to give their 5 minute presentations. I left before the end of the event because of other appointments. The other three students working on analysing the data, won the first price. They focused on one highway and found some correlation plotting the data on a map and making some observations with respect to the direct vicinity of the highway.
#DATA Hackethon - startSome weeks ago, I decided to join the #DATA Hackathon organized by Innovalor and to work on the road maintenance case. Yesterday evening, I already spend some time downloading weather data from website of the Royal Netherlands Meteorological Institute. Also experimented with interpolation algorithm for MySample.
15:01Enlisted myself and signed secrecy statement with respect to the data that will be provided. Played around with interpolation algorithm.
16:50 AnalyseDownloaded MDB Viewer to convert data to CVS files. Installed Open Office to inspect some Excel files. All very confusing
20:00About 20:00, I decided to start writing a program to analyze the available data that I have exported in CVS format. The students on the team want to start to analyze the result of some excel sheets, which are in rather complex form. Around 21:25, I left for home.
Myst III: ExileYesterday evening, I started playing the computer game Myst III: Exile with a good friend. Today, we finished Amateria and got kind of stuck in Voltaic. It is a little more than ten years ago that I finished the game for the first time. It has been a long time ago that I had a look into it. Many things look familiar, but that does not mean that I remember all the puzzles. I did not look at any hints, until we had problems with the "lava room" in Voltaic, but the hints did not seem to fix the problem.
BookAt 12:58:46, I bought the book Het verhaal van De Stijl: van Mondriaan tot Van Doesburg by Hans Janssen and Michael White from bookshop Broekhuis for € 27.50. It is about the history of the De Stijl, Dutch for "The Style", also known as neoplasticism, was a Dutch artistic movement founded in 1917 in Amsterdam.
BirthdayToday, I celebrated my birthday with some family and friend. I opened the book Atlas of Finite Groups: Maximal Subgroups and Ordinary Characters for Simple Groups by John Horton Conway, Robert Turner Curtis, Simon Phillips Norton, Richard Alan Parker, and Robert Arnott Wilson. I received it on October 24, but I decided to open it today, because I had asked for people to contribute money for the book. I also got the book Genius At Play: The Curious Mind of John Horton Conway by Siobhan Roberts as a present. Annabel gave me some tea and her boyfriend gave me some home grown walnuts. Bert and Cornelise gave a jar with applesauce.
Wednesday, October 28, 2015
Tuesday, October 27, 2015
PencilsAt 17:17, I bought two drawing pencils from the department store V&D: a 3H pencil with barcode 871571770653 and a 3B pencil with barcode 871571770592. I start carrying them from that moment. Earlier this week, I started making small sketches in the Explore every day book. I have decided to focus on drawing 'solid' squares, which seems simple, but I think it is a good way to practice your drawing skills.
BookAt 11:41, I bought the book Kinds of Minds by Daniel C. Dennett, ISBN:9780465073511, from charity shop Het Goed for €€2.95.
Trip to China 2010
-- contact -- Frans
My life as a hacker
The Art of Programming
HTML to LaTeX
eXtreme Programming Hamilton cycles