Dier Day RallyI accompanied Andy on the Dier Day Rally (Animal Day Rally) with Volkswagen Beetle and Citroën 2CV (in the Netherlands nicknamed '(ugly) duck') cars. We were traveling in a 2CV which had been galvanized, the only durable solution to rust. The 2CV is a very minimalistic car, to keep them cheap, but now that they have become rare, the have become worth more.
Going into the cityBefore I went into TETEM where I saw the exhibition Finger Talk by Karl Schulze. In the city, I went to galery Beeld & Aambeeld where I looked at the works by Elsbeth Cochius. I bought a set of ten large postcards with reproductions of her works for € 20.00. At Concordia, I saw a short film I may always ask her anything by Silke Schönfeld. At 15:11:45, I bought Moleskin daily planner for 2023. On the top floor, I saw five prints by Annelies Dam, which are going to be part of the exhibition Hora Ruit, Tempus Fluit.
Chestnut treeThis afternoon, I cut chestnut tree in the back garden, just like we did in Sunday, March 30. It again was getting rather high with several thick branches that grew from the trunck. Conny helpt with removing the leaves from some of the branches.
Arnon GrunbergI finished reading the book Aan nederlagen geen gebrek: Brieven en documenten 1988-1994 consisting of letters (and some documents) written by Arnon Grunberg, which partly overlaps with the time he wrote his first novel: Blue Mondays (Blauwe maandagen). I started reading this book on September 4. I bought it on May 28. This afternoon, I reread some parts of Blaauwe maandagen and I came to the conclusion that I find it more interesting to read his letters than his stories. Many of his letters are written in the same style as his stories, but where a story is only judged by the readers, the letters are not without consequences with respect to the relationship he has with the people he writes to. That makes them far more real.
PaintingThis afternoon, I went to pick up a recent painting from Maaike Goinga. This is the painting, I saw at the exhibition in Robson on Saturday, September 3. Shortly thereafter, I decided to buy it. She showed me her studio and we talked a bit about her recent work.
Thursday, September 22, 2022
Tuesday, September 20, 2022
Monday, September 19, 2022
12.1° CelsiusToday, the temperature at Twenthe Airport did not go higher than 12.1° Celsius. In De Bilt the highest temperature was 13.3° which made it the coldest September 18 on record, breaking the previous record from 1962.
AmsterdayToday, I went to Amsterdam by train. I made a stop at Utrecht where I walked to the bookshop Steven Sterk. I saw the book Actie-Reactie: 100 jaar kinetische kunst about an exhibition with the same name (YouTube). I also wanted to visit bookshop Broese, but that have moved to a new location. I Amsterdam, I first went to Architectura & Natura bookshop. I saw the book Tibetan Houses: Vernacular Architecture of the Himalayas and Environs. From there, it was but a short walk to andriesse ~ eyck gallery to see the exhibition Echoes and Traces with works by Lidwien van de Ven. Next I visited Galerie Ron Mandos to see the Best of Graduates 2022 exhibition. I found the works by the following graduates noteworth:
- Anton Shebetko
- Romina Koopman
- Katarina Head
- Kamiel Scholten
- Kwadwo Amfo
- Nural Ain Binti Nor Halim
- Jiyan Düyü
- Ellis Hofman
- Jasper van de Ende
- Bobbi Essers
- Sveske Ourø
- Marcos Kueh
I walked around the area and went to bookshop Boekie Woekie, books by artiss. From there I walked to Athenaeum Boekhandel and, across the street, to The American Book Center. The last bookshop I visited was Scheltema. On the train ride home, I saw some rainbows. First at 18:57 there was a partial (left-side) single rainbow on the left side of the train when we entered the station of the Apeldoorn, which remained visible till about 19:00. Then after we left the station, there was a double rainbow visible on the right side of the train. Because the train was driving away from the sun, I could not see if it was a compelete rainbow, but I suspect it was. It seems that both rainbows were originating from the same cloud. It is typical rainbow weather, just like yesterday, when I too saw a rainbow, with rain clouds that developing when cold air is coming from the north west. I did enjoy this trip to Amsterdam.
Book saleAt 17:28, I bought the following three books at the book sale at the book charity shop Het Goed for € 0.99 each:
- Verbeelding van verlangen written by Thomas Verbogt, Martha J. Haveman, Sylle Vis, and Joke Leeuwenburg, written in Dutch and English, and published by Broekhuis Uitgeverij in 2004, ISBN:9789070162931.
- Gianpietro Carlesso: Monografie und Werkubersicht, written by David Anfam, Giuliana Carbi, Markus Klammer, Adrian Locke, and Gianpietro Carlesso, edited by Markus Klammer, written in German, and published by Hatje Cantz Verlag in 2014, ISBN:9783775736480.
- Do Androids Dream of Electric Sheep written by Philip K. Dick in English and published by Orion Publishing Co in 2010, ISBN:9780575094185.
A: 0@ 0 .@ E: 0@ 0 0.@ B: 0@1 0 .@ B: 0@1 1 .@ B: 0@ 0 .@ C: 0@((11)+0+)* 0 .@ A: 0@((11)+0+)*(11)+0+ 0 1.@ A: 0@((11)+0+)*(11)+ 0 1.@ B: 0@((11)+0+)*(11)+0+1 1 .@ B: 0@((11)+0+)*(11)+1 1 .@ C: 0@((11)+0+)*(11)+ 0 .@ C: 0@((11)+0+)*(11)+ 1 .@ A: 0@((11)+0+)*(11)*1 1 .@ C: 0@((11)+0+)* 1 .@ D: 0@((11)+0+)*(11)+ 1 .@ E: 0@((11)+0+)*(11)*1 1 .@ D: 0@((11)+0+)* 1 .@ E: 0@((11)+0+)*(11)+0* 0 0.@ B: 0@((11)+0+)*(11)+0+ 0 .@Note how almost everything on the right tape is irrelevant. Although the behaviour of this Turing Machine looks very chaotic, the left side of the tape is rather regular.
SymbolicTMI finished the SymbolicBB.cpp program, which can be used to proof of a Busy Beaver Turing Machine terminate or not. The program (that I talked about last Tuesday) verifies that a collection of patterns, which make use of regular expressions to describe the states of the tape, describe all possible states that can be reached from a starting state. If this does not include a halt state, it proves that the Turing Machine will never terminate. The patterns (as processed by the program) for The Busy Beaver Challenge #43.374.927 that prove that it does not terminate, are:
A: 0@ 0 0@ B: 0@1 0 0@ C: 0@ 1 10@ B: 0@ 0 010@ C: .@ 0 1010@ A: .@ 1 010@ D: .@0 0 10@ E: .@00 1 0@ A: .@001 0 0@ B: .@0011 0 0@ C: .@001 1 10@ B: .@00 1 010@ B: .@0 0 1010@ C: .@ 0 11010@ B: .@ 0 1+(01+)*01+1010@ C: .@ 0 1+(01+)*01+1010@ C: .@ 1 1+(01+)*01+1010@ A: .@ 1 1*(01+)*01+1010@ B: .@ 0 (01+)*01+1010@ D: .@ 1 1*(01+)*01+1010@ D: .@ 0 1+(01+)*01+1010@ E: .@ 1 1*(01+)*01+1010@ A: .@ 0 1+(01+)*01+1010@ B: .@ 1 1*(01+)*01+1010@ D: .@1+ 1 1*010@ D: .@11+ 0 10@ E: .@1+0 1 0@ A: .@1+01 0 0@ B: .@1+011 0 0@ C: .@1+01 1 10@ B: .@1+0 1 010@ B: .@1+ 0 1010@ D: .@ 0 1+1010@ A: .@ 0 1+1010@ E: .@ 1 1+010@ B: .@1 1 1+010@ A: .@ 1 1+010@ D: .@0 1 010@ D: .@1 0 10@ C: .@ 1 11010@ B: .@ 1 1+1010@ B: .@ 0 1+11010@ C: .@ 0 1+11010@ C: .@ 1 1+11010@ D: .@ 1 1+010@This is a bit more than my earlier proposed solution. It is possible that this collection can still be reduced by making some patterns more generic. I am also thinking about adding some analyses algoritms. For a desciption also see SymbolicTM git repository.
GOGBOTThis afternoon, I went to GOGBOT with the title So Future: From Solarpunk to Metaf*ck. I found the following works of the exhibition noteworth:
- Espills by Playmodes. (Video)
- Game of me by Xuanning Chen. (Video)
- Is Repetition Real? by Martijn de Geele.
- Forced switch by Zhao Zhou
- Chasers of Promise: Toward Desirable Future(s) by Paulina Trzeciak.
- Pale Blue Dot by Weronika Uyar.
- The Reader by Stanza.
- Museum of Recycled Cassette Machines by Ka Ying Charlotte Chung. (Website)
- Embassy of the Aliens by Hung Lu Chan.
- Gamer Keyboard Piece by Sjef van Beers.
- Slow Wave Dream Station 01 by Bambi van Balen.
- Vulva Monologues by Emma Grima.
- Swing by Kai Uwe Onken. (Not part of GOGBOT exhibition it seems.)
- Why You Should Be Worried About Facebook's Metaverse
Thursday, September 8, 2022
- Esther Krop (Dutch)
First chestnutsThis morning, at 9:13, Conny and I found two rather small chestnuts on the Helmerstraat while taking a walk. We think that they are small due to the dry weather of the past months. We had some rain this morning for the first time in many weeks. The tall chestnut tree in the garden is getting too tall and too thick. We are thinking about cutting it down before it getting too tall to cut it down by ourselves. Conny has been taking care of the little chestnut tree after it lost it leaves again early in the summer. It has grown some leaves again and now about 16 cm tall. Kind of bonsai chestnut tree. last Friday, but it looks like the rules need to be a bit more complicated. However, I cannot exclude the possibility that they need to be far more complicated or that this approach is even not possible. It looks like I also need some more time to develop the program further.
Going into the cityThis afternoon, I went into the city. I first went to the open day exhibition at Robson, Stichting Vierkant. There I saw works by the following artists:
- Chris Roring
- Barbara Sendkner
- Barsoum Barsouma
- Ray Andreas
- Annette Krijnen
- Cas Banierink
- Cas Klaver
- Maaike Goinga
- M. de Wit
Next, I went to TETEM art space where I saw the exhibition Morphogenic Angels and Pink Moonrock Cries by Kieken artist collective. I spend some time looking at their presentation in the entrance hall made with Miro brainwriting tool.
At Concordia there was only an exhibition on the second floor called Groei Festival where Jasper Schütz works together with some people from Enschede to create art. There was an installation activated with a proximity sensor with activated shows you a room full of people applauding.
OrthocenterFloor van Lamoen informed me that the center of the triangle that I talked about on August 4 is the orthocenter, which is the point where the three altitudes of the triangle cross. This was already described by Euler as the orthocentric system. Floor van Lamoen is one of the people who have contributed to the Encyclopedia of Triangle Centers. Some information about his contributes are found on his mathematics page (in Dutch). The Busy Beaver Challenge #43.374.927, which if correct prove that it is infinite:
A: .* 0 0* => B: .*1 0 0* A: .* 1 010* => D: .*0 0 10* A: .* 1 1010* => D: .*0 1 010* A: .* 1 1+010* => D: .*0 1 1*010* A: .* 1 (01+)+010* => D: .*0 0 1+(01+)*010* A: .* 1 1(01+)+010* => D: .*0 1 (01+)*010* A: .* 1 1+(01+)+010* => D: .*0 1 1*(01+)*010* B: .*1 0 0* => C: .* 1 10* B: .* 0 (01+)*010* => C: .* . 1(01)*010* B: .* 0 1+(01+)*010* => C: .* . 11+(01)*010* B: .* 1 (01+)*010* => B: .* . 1(01)*010* B: .* 1 1+(01+)*010* => B: .* . 11+(01)*010* C: .* 0 1+(01+)*010* => A: .* 1 1*(01+)*010* C: .* 1 10* => B .* . 010* C: .* 1 1+(01+)*010* => B: .* . 01+(01)*010* D: .* 0 10* => E: .*0 1 0* D. .* 0 1+(01+)+010* => E. .*0 1 01+(01+)*010* D: .* 1 010* => D: .*1 1 0* D: .* 1 1+(01+)+010* => D: .*1 1 01+(01+)*010* E: .* 1 0* => A: .*1 0 0* E. .* 1 01+(01+)*010* => A: .*1 0 1+(01+)*010*
Now, I plan on writing a program that can process these rules and proof that the rules are correct and cover all possible cases.
Drents MuseumConny and I went to the Drenthe province. We first went to Drents Museum in Assen, the capital of Drenthe. There we saw several exhibitions. The first exhibition we saw was Nebra Sky Disk, which is about the Nebra sky disk. We both had some doubts about some of the texts at the exhibition as they expressed certain interpretations as fact. The object is from a time where there is no written accounts, meaning that there is a lot of room for interpretation.
- Self-Portrait, Roseming Hendriks, 2003. (I must have overlooked this one on June 16.)
- Self-shortened, Arout van Abada, 2008
- Self, Laura Eckert, date unknown.
- Self-Portrait with Snorkel, Pieter Pander, 2004
- Self-Portrait, Herman Tulp, 1978
- Self-Portrait in Red Bathrobe, Barend Blankert, 2007
- In-Between Self, Deborah Poynton, 2021. (Conny had not seen this and took a keen interest in the painting.)
- Monochrome Self-Portrait with Cap, Philips Akkerman, 2003
- Self-Portrait, Philips Akkerman, 2007
We also revesited the Under the Spell of Mount Ararat exhibition. Again we were impressed by the Armenian alphabet. In the exhibition there was also an Armenian bible printed around 1666 in the Netherlands and being published by Voskan Yerevantsi. Conny bought two books at the museum shop: One about the Nebra sky disk and one about Deborah Poynton.the Dwingelderveld National Park. We walked the 'white' route that contains some decking paths on poles that are in the wet areas. But because of the lack of rain we did not see any water while walking these paths. In the past three summer months there was an average of 135mm of rainfall where 224mm is normal. It was also one of the most sunny summers with 835 hours of sunshine while 640 is the average. It was the third hottest summer after the summer of 2018 and 2003 with an average temperature of 18.6°C against 17.5°C normal.
Wednesday, August 31, 2022
Hummingbird hawk-mothJust before four in the afternoon, there was a Hummingbird hawk-moth in our back garden visiting our butterfly-bush (Buddleja davidii). We had never seen one before. I took three pictures, where the image below is taken from one of them.
I am SpockI finished reading the book I am Spock by Leonard Nimoy, which I started reading on July 19 after I bought it on July 9. An interesting book to read, but as some point I felt it was a bit too much an enumeration of trivia facts. I understand that Nimoy choose this title because he received a lot of criticism about the title of his previous book that was called I am not Spock. Everywhere in the book there are fragments of internal dialog between 'Spock' and 'Nimoy'. But having internal dialog with a fictive character does not make yourself that character. I presume that Nimoy, although he strongly identifies with the fictive character Spock, does mean with the title of the book, that he is very much like Spock. Maybe there are people who are more like Spock than Nimoy because I wonder if he has a very Spock like personality seeing what he has achieved as an actor and a director.
Local heat waveThe temperature at Twenthe Airport has gone up to 32.7° Celsius touches the record of on this date from 2016. It is also the third day the temperatures went above 30°C and because since last Friday the temperature went above 25°C every day, it means we have a local heatwave according to the Dutch rules.
- The New Normal: The Coming Tsunami of Fakery
- Old Problem About Mathematical Curves Falls to Young Couple
32.3° CelsiusThe temperature at Twenthe Airport has gone up to 32.3° Celsius, which breaks the previous record of 31.0° on this date in 2016.
30.6° CelsiusThe temperature at Twenthe Airport has gone up to 30.6° Celsius, which breaks the previous record of 29.3° on this date in 1955. irregular grids of squares and equilateral triangles which can be seen below. This is not yet a proof that it it possible to create infinite irregular grids using this method. On April 6, I already showed that there is a method to create infinite irregular grids for each infinte square grid filled with two values.