Semi-rotsklimmen Bad Gastein

Zes weken voordat het wereldkampioenschap paraklimmen in Innsbruck losbarst, kan ik natuurlijk niet op vakantie in Oostenrijk zonder te trainen 😉

2018 - bad gastein

Ik noem dit semi-rotsklimmen, omdat er extra grepen aan de rots zijn vastgemaakt. Maar omdat de rots niet helemaal vlak is, zitten deze extra grepen niet helemaal vast (ze gaan draaien als je erop gaat staan). Je moet dus goed blijven opletten terwijl je klimt!

Posted in Paraclimbing | Leave a comment

paracup Imst 2018 eindresultaat

IMG-20180707-WA0006

 

De eerste dag was ik behoorlijk moe, waardoor ik van de drie routes slechts een helemaal heb uitgeklommen. Gewoonlijk zijn de te klimmen routes op de tweede dag een stuk moeilijker, dus van gisteren had ik niet veel verwacht. Dat viel eigenlijk best mee: in alledrie de routes ben ik tot ongeveer de helft gekomen 🙂 Ik ben als vijfde geĂ«indigd.

 

Nog even de route die het allerbeste ging:

 

Posted in Paraclimbing | Leave a comment

Paraklimwedstrijd Imst (Oostenrijk)

Update: de tweede route ging goed

de komende twee dagen moet/mag ik hier zes routes klimmen (steeds zo hoog mogelijk). In mijn categorie zijn er zes mensen: tegen 4 van hen heb ik eerder geklommen, Ă©Ă©n (uit SloveniĂ«) ken ik nog niet, en de laatste hoop k echt te verslaan. Dat ben ik namelijk zelf 😁

Posted in Paraclimbing | Leave a comment

What Does ‘=’ Mean?

It is often said that in mathematical equations, such as ‘2+2=4’, the symbol ‘=’ represents the fact that on both sides of the equation there is the same thing. That’s wrong: on the one side there are three symbols, while on the other there is just one.

humanrightscampaign-redequalitysingoesviral13

Even in the equation ‘1=1’ the same-thing-on-both-sides-reading is wrong, because there there are two separate things (the ‘1’ on the left and the ‘1’ on the right).

So how should we understand the ‘=’-symbol? It might seem reasonable to say that in the equation ‘2+2=4’ we should read ‘=’ as meaning that the things that the numbers refer to are the same (in number). If the numbers in the equation refer to apples, for example, then the equation merely states that if you add two apples to two apples you end up with four apples. The ‘=’-symbol tells you that two apples added to two apples is the same as four apples.

But this view is problematic. Mathematics is usually understood as a language or formalism that is independent of reality. Mathematics is, to put it disrespectfully, merely a bunch of tautologies, whose truth depends on the definitions that we ourselves choose. We can of course apply mathematical language/formalism to things we see, but then we are no longer doing mathematics – we’ve turned into physicists.

We can’t just say that the number of apples referred to by the symbols are the same, because mathematical terms have no meaning outside of mathematics.

so what is “=”?

 

Posted in Philosophy of Mathematics | 2 Comments

De training van vandaag…

 

…was een groot succes!

Posted in Paraclimbing | 1 Comment

Strange Encounters

The man from Dutch Railways (NS) had actually grabbed and stopped my tricycle and walked around to stand in front of me. My front wheel was between his feet, so I couldn’t turn away. He looked at me and said: “I could take you from your tricycle easily if I wanted to.” I was perplexed. Was this guy actually threatening me?! “yes, that’d be easy,” I said, “because my left arm and leg are paralysed.” My response did not have the effect I had hoped for. He smiled at me and said: “can you prove that?”

Because of my disability I use a tricycle to get around. Inside buildings, and even inside shops, when I have to walk a long distance, I cycle my way. That of course raises many eyebrows – you don’t see a bearded man on a tricycle in the supermarket every day. I understand that, and I don’t mind telling people that I’m on a tricycle because of a brain tumour, not even if I have to do that every day. But what happened to me on the particular morning I’m telling you about, was simply astonishing.

The story starts several months ago. I had been teaching the whole day, and I was trying to find the train to Utrecht, to get back home. So I tricycled my way through the station, when an employee of the Dutch Railways (NS) told me to step off from my tricycle and proceed on foot. Normally I would have told him about my brain tumour, but since I was tired, I told him that I don’t ride a tricycle for fun. “Then why do you ride a tricycle?” he asked. “Because I can’t walk” I told him. He wasn’t convinced. He put his hands in his sides and took on what they call the ‘power-pose’. “I’d like to see that” he said with a smile. I couldn’t believe my ears. I became very angry, but I couldn’t think of the proper way to answer him. I just shook my head in disbelief and decided to ignore him. I cycled past him, and found my way to the train to Utrecht – and never looked back. I did my best to forget about what had happened, and I didn’t think about the events very much afterwards.

Until today.

Again I was on my way to the train travelling to Utrecht. I was tricycling across the central hall of the train station when my eyes met those of the NS employee that I had met before. I was about to cycle past him, but apparently he didn’t remember our previous encounter, because again he told me to get off my tricycle. Without turning my head I cycled on, towards where the platforms are. I had hoped that this would be the end of our second encounter, but I was sorely mistaken. The man ran after me and grabbed the frame of my tricycle.

“How can I prove that I have a brain tumour!? I can’t just cut myself open, can I?!” I felt that I was losing my temper, because I really didn’t know what to do or say. A colleague of the man was standing several meters away from us, but didn’t interfere. It felt as if they were waiting for me to become aggressive. I knew that, so I knew that that’s what they’d expect. At a certain point the man looked aside, towards the entrance of the railway station. when he turned his head, he also moved his foot a little bit. And that’s when I escaped. I got on the train, and went home.

As I write this, I feel both proud and ashamed. Proud, because I hadn’t started shouting or become aggressive, but also ashamed, for escaping…

Posted in Travels | 6 Comments

Paraclimbing photosession May 23 2018

[the charming lady in the first picture is my coach]

Team paraclimbing 2018 Zout Fotografie (4 van 34)Team paraclimbing 2018 Zout Fotografie (16 van 34)Team paraclimbing 2018 Zout Fotografie (3 van 34)Team paraclimbing 2018 Zout Fotografie (32 van 34).JPG

 

(credits go to Rein Rijke of Zout fotografie)

Posted in Paraclimbing | 1 Comment

Reizen met een handicap 

Om te reizen met een handicap moet je soms (letterlijk) out-of-the-box denken

Posted in Travels | 1 Comment

Biografie (Nederlands)

Op mijn 16e heb ik een hersenbloeding gehad, waardoor mijn hele linker lichaamshelft (arm, been, oog, alles!) spastisch werd. De oorzaak van de bloeding was een niet-te-verwijderen hersentumor, die ze tot drie keer toe toch hebben proberen te verwijderen. Keer op keer heb ik dat maar net overleefd. Desondanks heb ik mijn middelbare school afgemaakt (2000), en ben ik in Utrecht sterrenkunde gaan studeren. Al gauw kwam ik erachter dat sterrenkundigen zich vaak verschuilen achter moeilijke vergelijkingen, zonder in te gaan op de (filosofische) vragen die aan de vergelijkingen ten grondslag liggen. Ik besloot daarom een PhD onderzoek in de filosofie van de natuurkunde te doen. In 2017 ben ik in Utrecht gepromoveerd.
228345_200584023314340_1921610_n

Al sinds 2008 doe ik aan klimmen (meestal in een klimhal maar soms ook in de bergen), maar pas sinds 2016 doe ik mee aan de internationale paraklim-competitie. In september 2016 ben ik 4e geworden op het WK in Parijs, en nu train ik voor het WK 2018, dat in september in Innsbruck gehouden zal worden.

 

Als ik niet hard aan het trainen ben voor het paraklimmen, dan ben ik docent natuurkunde/wetenschapsfilosofie aan de universiteit, en schrijf ik veel. Ik heb een boek geschreven over het paraklimmen dat binnenkort uitkomt, en ik schrijf meerdere blogs over filosofie en natuurkunde.

21617959_1478261922253882_4623168448915128754_n

Wil je meer weten? laat dan een berichtje achter!

Posted in Paraclimbing | Leave a comment

Binnenkort in Amsterdam:

Untitled.png

Image | Posted on by | Tagged , , , | Leave a comment