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Diary, November 2009

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Wednesday, November 4, 2009

Chinese Wooden Puzzle

I brought the Chinese Wooden Puzzle with me to my office. One colleague suggested that we should search for the most compact solution. There are various possible metrics for compactness. He suggested to use the largest distance in the pieces with the same colour. Some other that I thought about was the area of the smallest enclosing rectangle or the area of the smallest convex enclosing. Later, I thought about the simple metric that I have used before: the number of neighbouring squares with the same colour. The two solutions I found today for searching for compact solution are found on the list of solutions. The second of these is the most compact on the list (sofar). It is:

One of the least compact solutions is the second solution on the list, which is:

Thursday, November 5, 2009

Chinese Wooden Puzzle

Today, I let a program calculate all the solutions for the Chinese Wooden Puzzle using two pieces for all possible type of pieces, inside a 15 by 4 frame. I got this idea a colleague showed me a solution. A total of 78600 solutions where found, with 51852 different color patterns. A total of 12963 unique solutions where found.

Wednesday, November 11, 2009

Playing Go

It has been four weeks ago that I went to the university in order to play Go. Short after I arrived, Rudi and Taco also arrived. Rudi suggested that he would play against us simultaneously. He accepted a eight stone handicap against me. Somewhere in the middle game, I lost one of my groups. I first realized that the group in the center of the board did only have one eye. Next I discovered that I could make a second eye in the corner. But instead of playing on the 1,2-point, I played on the 1,3-point, which was followed by Rudi playing on the 1,2-point and thus destroying the second eye. I formally resign, but we finished the game. I lost with about 30 points, but Rudi estimated that the group that was killed was worth about fifty points. Next I watched the game between Rudi and Taco till the end. I could not remember much about my own game, but when I sat home and tried to replay the game, many moved came to my mind, and I created this game 'sketch' in SGF.

Thursday, November 12, 2009

Dyslexic brain

In the article Neural mechanism reveals why dyslexic brain has trouble distinguishing speech from noise (about the paper Context-Dependent Encoding in the Human Auditory Brainstem Relates to Hearing Speech in Noise: Implications for Developmental Dyslexia) it says:

Monday, November 23, 2009

The Inescapable Self

This morning, I finished reading the book The Inescapable Self: An Introduction to Western Philosophy by Timothy Chappell. I started reading this book on May 22, after I bought it on Saturday, May 16 from De Slegte for € 9.95. The book deals about the sceptic question whether we can be sure that there is an external world. Can we be sure that we are dreaming all the time, or that our mind is deceived as in The Matrix? The book also deals with a number of (moral) dilemmas that are related to this issue. The author explains how various philosophers through the ages have dealt with these questions, hence the subtitle. I have to confess that I probably less than one third of the text of the book. I felt the sixth chapter, about the nature of consciousness a little weak. For example, it introduced the concept of zombie minds in a rather ad hoc manner, without questioning it much, lest trying to explain the problem of consciousness verses zombie minds. Also the last chapter, in which the author gives a sketch of how all, but the first dilemma (can we be sure about the existance of a real world), can be done away with, either by showing that there is no dillema or by showing that there is a way out, leaves much to be answered. Nevertheless, I found it an interesting book to read. But I am happy that I finished it.

Thursday, November 26, 2009


This afternoon at 13:12:34, I bought two books from bookshop De Slegte, namely:

Saturday, November 28, 2009

Just a Saturday

This morning, I weighted 76.8 kilogram on our scales. That is the lowest value in months. The last two weeks I dropped about one kilo. This might be related to the fact that Annabel is staying home during the week again. Maybe it has to do with the fact that I go to bed earlier or that I am more active because I have to cook dinner? I don't know.

I have been reading in the Dutch translation of Letters to Anais Nin (which I bought last Thursday) and been paging through the Dutch translations of Dairies 1931-1934 and Henry and June by Anaïs Nin.

This afternoon, I went into the city for some shoppings. I went to Fotogalerie Objecktief where I watched the exposition "New Saints" by 'de realisten' (Jan Wierda and Carel Lanters). It was quite interesting, because it involded 3D-photography. On both sides of the hall large portret pictures where put on the wall. In the center there were stand with two small mirrows on top of them. If you stood before one of the stands, each eye would see (through on of the mirrows) one of the portrets, and produce a 3D-effect.

Next I went to bookshop De Slegte where at 16:02:09, I bought the following two books:

In the evening, Annabel and I watched the final of "The best idea of Netherlands". Annabel also baked some bread for the first time. It turned out quite nice. I also read about half of the book by Loesje.

This months interesting links


KMZ file of movements.

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