Sun Mon Tue Wed Thu Fri Sat
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
I got the following two books:
- De sprong der paarden en de zoete zee written by Harry Mulisch
in Dutch and published by J.M. Meulenhoff in 1964.
- Tao te ching: de kunst van harmonie written by 老子
in Dutch published by Librero in 2009, translated by Wilma Paalman from
the English The Art of Harmony, which was translated from the
Border and marke stones
Conny and I went on a biking and walking trip
again. We first visited the Groot Brunink estate again. We found a small path
throught the fields that Conny did not know yet. After we had walked around
for about an hour, not counting the short break we took (during which Conny
took a picture of me), we
continued on bike. We first biked to the border with Germany. There we found
the marke stone, named Werthepaal, which is at the cross point of four markes, three in the
Netherlands: Esmarke, Usselo, and Buurse, and one in Germany: Alstätte.
This stone also marks the border with Germany. It was placed there in 1743 but
in the seventies it was lost for some time and when found again, placed on a
new foundation at the original location. We continued along the border to the
South. We found another border stone, with the offical number 840-B, called:
"pfael an der Mesemate". We biked through 'Witte Veen', where it was quite
busy, and Conny led me to another marke stone named Veenpaal. This one looked quite new, and indeed, it was
not an original stone, but a replica, placed there in 2013 and officially
revealed on November 14, 2015. At home we took some time to do some research
about border stones.
"Digital" mirror date
Today is a "Digital" mirror date, the first for
the date formats MM/DD/YYYY and YYYY.MM.DD, and the second for the format
DD-MM-YYYY. This is the fifth
special date of this year.
Today, the news came that Sanquin, the Dutch organization for blood and
blood product, announced that they have ordered a milion tests for
the SARS-CoV-19 virus in the research about
immunity for the virus. They want to use this tests in their ongoing research
about herd immunity,
but also for the extraction of antibodies that could protect vunerable people
agains becoming infected. Some weeks ago, the already concluded that about 3%
of the population had been infected. With the current number of new infection,
I cannot believe this percentage has reached 10% by now. This while for herd
immunity you need somewhere between 29% and 74% infection rate based on the
estimated of the infection rate. It is difficult to estimated the actual
infection rate, because all the lock-down measures make it substantially
lower. Without these measures, you might need more than 50% infection rate
for herd immunity. To me, this research in herd immunity seems rather useless.
Would it not be much beter to use the test all the people who think that they
were infected and do some reseach into what are the major risc factors for
getting infected and what are the most effective counter measures to be
taken to avoid another outbreak? I heard some story about someone who got
infected on a skiing trip, but did not infect his family members while being
in quarantine when he was ill. It seems that Iceland has succeeded in
eradicating COVID-19 by extensive testing and tracking. It seems that
the Dutch public health services do not know if they are ready to test
teachers now that primary education is going to be reopened next week and
that they are not able to actively track cases that test positive. It sounds
like bureacrating problems are preventing them from doing this.
Test and track
Yesterday evening, our government presented the provisional road map for ending
the lock-down measures. During the press conference, the government said they
would focus on testing and tracking. The plan is that from June 1, tests will
be made available to everyone, not just restricted to certain professions, as
it has been up to now. The number of positive cases are slowly dropping, so it
would be no problem. There will also be an experiment with opening some care
homes. As far as I know, the one that Andy lives
at, is not included. No mention was made about mental health care, which some
people are dissapointed about, because hairdresser are allowed to open again.
In the past months, our government has been stating over and over again, that
face mask are not useful, but now they are stating that non-medical grade face
mask should be worn when making use of public transportation. The motivation
for this is that the 1.5 meter distancing is not possible in public
transportation. (There is still a shortage of medical grade face mask.) There
is no evidence that the 1.5 meter distancing rule has been the most effective
measurement with respect to stopping the spread of the SARS-Cov-19 virus, but it seems it has been declared to the holy rule
that everyone should stick to, while experts recently announced that people
still having trouble with proper hand washing procedures.
This morning, Conny and I went biking and
walking around the Zonnebeek estate. We walker around the forest for almost an
hour. There were quite a lot of mosquitos. Half way we had a look at the
american style country house, which was build around 1907 by
(Jan) Bernard van
Heek and Edwina Burr Ewing, who came from Nashville, Tennessee. They
donated a large part of their art collection to Rijksmuseum Twenthe. They also
donated the Buursezand, a large nature area, to Vereniging Natuurmonumenten. We continued biking a came along another
marke stone, the Leppepaal or Leppinkpaal, which is in the middle of a field. It is standing at the
border of the marke Usselo and Buurse. We continued biking and crossed the
I found a website of the radio program Superclean Dreammachine. This program was made and presented by
Ad Visser and ran from
May 15, 1968 to September 29, 1980. (He also presented the TV show
TopPop.) I often listened to
the radio program because it had a mix of alternative music styles often with
synthesizers. I even remember having listened to some dummy head recordings supposively made in Egypt, but I am not totally
sure it was part of this program. Several times, I recorded the program on a
cassete tape. I did this on May 29, 1978. The recording referred to on the
website is this recording. The show started (some songs from) with the album
Shpritsz. The next part
was announced with: "The legends of King Arthur and the Knights of the Round
Table. Luister naar de muziek van ex-jazz musicant Rick Wakeman. Sinds kort
weer terug samen met The Royal Philharmonic Orchestra." I liked it very much
and listened to it many times. I still have the tape somewhere in the attic.
I tried to find the recording and I even ordered The Myths and Legends of King Arthur and the Knights of the Round Table
only to discover that this was not the recording I was seeking after. Tonight,
I discovered that it was actual the LP The Royal Philharmonic Orchestra plays Rick Wakema that was play. I am
happy that I have found this recording after so many years.
Last night, between 5 and 6, the temperature at
Airport Twenthe at 1.5 meter height dropped to -1.8° Celsius, while at
10 cm the temperature dropped to -6.9° Celsius. This broke the record of
-1.2° of 1973. This type of low temperatures, do happen more often during
this period of the year, and a lot of records have been broken in the past
twenty years, which seems a little counter intuitive. One reason that the
temperature dropped so low, is that the air is relatively dry. This causes
clouds to disappear during the night and air to cool faster. We get this dry
air because of winds from the North and the East. It has been this type of
weather sinds the start of April with only a little rain, less than the driest
year, 1976, on record. It is caused by high pressure systems North passing over
At 17:01:45, I bought the book Geek Wisdom: The Sacred Teachings of Nerd
Culture written by N. K. Jemisin, Zaki Hasan, Genevieve Valentine, and
Eric San Juan in English, and published by Quirk Books in 2011,
ISBN:9781594745270, from charity shop Het Goed
for € 2.00.
Conny and I followed the old tradition of
'dew walking' ('dauwtrappen' in Dutch), which involves going on a bike trip
early in the morning of Ascension Day. We left at about a quarter past five.
When we came outside of the city, we noticed mist over a lot of fields and also
over the lake at Ruthbeek. We planned to scout for border poles along the
border with Germany. Yesterday evening, I had compiled a route. This are the
border poles that we found:
From there we biked home.
- At 6:12, pole 840.
- At 6:17. pole 839-B.
- At 6:23, pole 840-B, also known as "pfeal an der Mesemate".
- At 6:28, pole 840-D. (This pole is not mentioned on the map of the markegrenzen.nl website.)
- At 6:32, the Wertherpaal.
- At 6:48, the poles 840-H and 840-G. Along the road to these poles, there are some building
belonging to the railway station Broekheurne, which was in operation
between April 25, 1903 and April 29, 1967. It appeared that the road called
Zuidergrensweg was private property, meaning that we could not go there
and had to skip some part of the planned route.)
- At 7:13, the poles 843, 842-L, and 842-K from a distance while standing on the road called
- At 7:16, pole 843-C. (Not in my planning.)
- At 7:20, pole 843-D. (Not in my planning.)
- At 7:25, pole 844-A. (We missed pole 844, while we walked past it.)
- At 7:33, the two border poles from unknown origin that recovered as being
used for a fundation of a building and placed in a field along the road
called Aamsveenweg. Not in my planning.)
- At 8:17, pole 845-C.
- At 8:32, pole 845-E from a distance because it being in a raised bog. (We did not see pole 845-D, which must be behind it from
the point we saw it.)
- At 8:34, pole 845-G.
- At 9:29, pole 845-M. (This and the following two poles where not along
a route in my planning but found when taking a detour.)
- At 9:33, pole 845-K.
- At 9:37, pole 845-H. Conny walked to 845-G again. (At home, I discovered,
we missed poles 845-J and 845-L.)
- At 10:12, pole 847.
- At 10:22, two poles 848, a Dutch one and a German one, which are both sides of the brook called
Glanerbeek where the border is in the middle of the brook.
Resistance against measures
The resistance against the COVID-19
measures is increasing in particular agains the 1.5 meter distance rule.
Yesterday, the weather during Ascension day was quite nice, so many parks,
beaches and recreation areas were crowded and many people ignored the
distancing rules. Some people from the catering industry have started a
facebook group agains the measures, which are difficult to apply when they are
allowed to open on the first of June. There is also criticism from scientists,
like a Ira Helsloot, professor of Safety Management at Radboud University,
who states (Google translate translation from Dutch): "If you look back in the
statistics, we know that the 'intelligent lockdown' would not have been
necessary."and continues to explain that all other measures, like staying home
when having a cold, had the greatest effect. There are also people pointing at
the evidence for aerosol transmission of COVID-19, especially in crowded,
noisy indoor locations, where people are talking loud and/or singing. If
transmation does not happen through aerosols, as the RIVM is claiming, there is
no need to keep the 1.5 meter distance when people are not coughing and/or
sneezing. There are also people who have a problem with the fact that the
government (and the RIVM) are still aiming for herd immunity and not aiming at
containment. In the worst infected region, around 10% of the population has
been infected. In other areas, like ours, it is around 3%, but in most areas
it is even lower. And even in our area the percentage is probably so high due
to a number of localized outbreaks. The RIVM is stating that a vacin may not
be effective and that herd immunity is the only possibility. But at the current
rate it is going to take years before the required infection rate is achieved,
and it is still an open question whether someone who has been infected, will
remain immune for many years or that the virus will mutate, because corona
viruses are known to cause repeated infections in people throughout their
lives. See also this interesting timeline with respect to COVID-19 in The Netherlands.
This afternoon, I discovered that the little cestnut tree has withered. I must admit that I have not watered the flower
pot is planted in and that it must not have had enough water due to the
extreme dry and sunny weather of the past weeks. I will try to remember to
water it in the coming weeks.
Noise Engine 1
In the evening, I went to TkkrLab, where
there were but a few people. I bought a breadboard from the vending machine and went to experiment with the
40106 IC from the 4000-series integrated circuits, which has six inverting
I used three of these to make a circuit. For a short demo, see the
Noise Engine 1
Conny and I went on another hunt for border
poles. This time our goal was the Drilandstein, a border pole on the border
of The Netherlands and the German states North Rhine-Westphalia and Lower Saxony.
The poles we encountered are:
- At 7:18, pole 857.
- At 7:22, pole 857-A.
- At 7:27, pole 857-C.
- At 7:32, pole 857-D.
- At 7:36, pole 858.
- At 7:40, pole 858-A.
- At 7:44, pole 859.
- At 7:51, poles 860-A and 860.
- At 7:59, pole 861-A.
- At 8:02, pole 861-B.
- At 8:09, pole 860-B.
- At 8:17, pole 862.1, the Drilandstein
- At 8:58 we looked at the replica of the Drilandstein
- At 9:32, pole 854.
- At 9:43, pole 853. (We could not locate pole 852)
- At 9:59, we saw pole 851 from the Glanergrensweg.
- At 10:05, pole 849-N.
- At 10:07, pole 849-M.
- At 10:46, but one of the two 846-J poles.
- At 11:07, pole 845-X.
- At 11:14, pole 846. (We walked past pole 845-Y, if it is still there, without
- At 11:31, pole 845-W.
- At 11:35, pole 845-U.
- At 11:38, pole 845-V.
- At 11:52, pole 845-S. (We searched for pole 846-T.)
- At 12:23, pole 845-L. (We did not find pole 845-J.)
- At 12:31, pole 845-O.
- At 13:05, pole 844-N.
- At 13:34, pole 844.
Some links (in Dutch) with information about poles along the route that we
This months interesting links
| April 2020
| June 2020
| Random memories