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Today, I celebrated my birthday with some family and friend. I opened the
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.
At 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.
Myst III: Exile
Yesterday 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.
#DATA Hackethon - start
Some 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
Enlisted myself and signed secrecy statement with respect to the data that
will be provided. Played around with interpolation algorithm.
- 15:40 Opening
- 15:58 I informed the organization about the project I want to work on.
- 16:05 Assignment of teams and individuals announced.
- 16:08 Explaination of the project
- 16:50 Begin Analyse.
Downloaded MDB Viewer to convert data to CVS files. Installed Open Office to
inspect some Excel files. All very confusing
About 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.
#DATA Hackethon - end
I 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.
Chinese Wooden Puzzle: White, orange, yellow, and red
In 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
At 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
Books and wet snow
At 17:10:09, I bought the following books from bookshop Broekhuis:
- Dutch translation of the Inheritance cycle by Christopher Paolini, for € 17.50, consisting of:
- Eragon, ISBN:9789022565292.
- Oudste (Eldest), ISBN:9789022565308
- Brisingr, ISBN:9789022565315
- Erfenis (Inheritance), ISBN:9789022565322
- De ontdekking van de literatuur: The Paris Review Interviews, with
Joost Zwagerman as editor, ISBN:9789023425618 for € 7.90.
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.
Turner and photographs
Today, Conny and I went to see the Danger & Beauty - Turner and the
tradition of the sublime exhibition at
Rijksmuseum Twenthe and the various places
where the "Fotomanifestatie Enschede 2015" was held.
We first went to TETEM art space, were we
looked at portret pictures of Koos
Breukel. We also watched a documentary about the photo exhibition.
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:
Furthermore, we saw:
- Modern Italy - The Pifferari
- Inside of Tintern Abbey
- Dolbadern Castle, North Wales. Around 1800.
- Kirkstall Abbey, on the River Aire
- Hornby Castle, from Tathan Church
- Rome from Monte Mario (1820)
- Mount Snowdon, Afterglow
- Mountainous landscape / Lake with Hills
- View of Oriete, Painted in Rome. (1828)
- Scene in Derbyshire
- A bridge over the Usk (1799)
- Thomson's Aoelian Harp (1809)
- Bridge of Sighs
- Mountainous Landscape (A Swiss Pass) (1848-50)
- Convent du Bonhamme
- Near the Pass of S. Bernadino: A bridge over a River in a Gorge
- Domleschg Valley
- Colour Beginnings
- Mountains S. Gothard
- Falls of Schaffhausen
- The high street, Oxford (1837-38)
- The fifth Mague of Egypt (about 1800)
- Ulysses Deriding Polyphemus
- A Stormy Landscape with a Obelisk and a Classical Portico
At 15:31:48, we bought the book Gevaar en Schoonheid: turner en de traditie
van het sublieme, ISBN:9789462620490, about the exhibition.
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
Genius at Play
I 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.
| October 2015
| December 2015