Marcel Haas 🟥

@harcel.bsky.social

796 Followers 870 Following

Data scientist in population health @ Leiden University Medical Center. Former astrophysicist: extronomer! Beer sommelier. Pythonista. Aspiring Bayesian. Dad. Puzzle solver and Go/Baduk player.

Interior of the store and coffee shop.
The first inner page of The GCHQ Puzzle Book II.
The starting screen of the Grande Finale event.
Caecilia Institute for population health and data sciences - With a logo with a person in a circle with a bunch of zeros and ones.
All presents! Some self-made.
Many moths on the trunk
Spider web-like rag going all along a tree, very dense.
Translated: Only today, 2e-50%
Me fake teaching my colleagues at Health Campus The Hague, with clenched fists and a broad smile.
The lecture room from the back, and the other two teachers upfront.
Proms: The Four Seasons Recomposed.
Three home batteries
A page of a book saying "This is not for you."
A page of a book, saying (in handwriting): "Hey, put the book down. Come in here + stay." Followed by a "OK", which is lined through.
Initial styling and wiring of a spruce
The tree in its original plastic pot, before any work
A windmill in the mist
Een nieuwsbericht over militairen die naar Groenland gaan: "Noorwegen stuurt twee militairen" en "Duitsland stuurt meer dan tien militairen".
A statement from many Lamy: LAMY celebrates creativity, imagination, and inclusion. The views of the author of the Harry Potter series do not represent those of LAMY or its employees.
Headline: the Netherlands is a popular destination for Americans leaving the US. The picture shows a family of three. There's way too much food and a very obvious can of Coca Cola on the table.
Vier opties voor coalities in NL, van NOS.nl
The fully assembled Nautilus puzzle box.
Cluebox Nautilus by iDventure, fully disassembled.
Exit - the game. The Abandoned Cabin.
A pin machine, with a very odd order of the numbers: 978 431 506 2
A huge multiplication, executed correctly by Gemini.
A selfie in front of the Colosseum.
Redo of the before and after styling of the juniper, my very first pre- bonsai!
Before and after of the Hinoki Cypress.
I asked ChatGPT if 1980 was 45 years ago. It said no, then followed with "in 2024 it was 44 years ago, so in 2025 (this year) it would be exactly 45 years ago."
The trunk of a juniper pre- bonsai.
A potential front view of a pre-bonsai in a plastic pot.
The Little Book of Bonsai by Jonas Dupuich, an excellent introduction, or so I heard.
A contact grill with two grilled ciabatta's with mozzarella, tomato and pesto.
West North Ave and East North Ave in Baltimore.
Two news headlines about the parade on Bad Orange Man's birthday. The Guardian says "US army plans for a potential parade of 6600 soldiers on Trump's birthday", Fox says "Trump to host military parade to celebrate army's 250th birthday, honor active-duty service members veterans"
A petrol blue notebook with my initials and two ribbons: brown and orange.
Gödel, Escher, Bach by Douglas R. Hofstadter
A Facebook post, that I didn't ask for, telling me how generous and charitable Elon Musk is. What a fucking joke.
An abstract from the IMF website on the definition of capitalism. Reading literally: Capitalism is often thought of as an economic system in which private actors own and control property in accord with their interests, and demand and supply freely set prices in markets in a way that can serve the best interests of society. The essential feature of capitalism is the motive to make a profit.
Washington Times news article stating: Trump signs executive order allowing only the attorney general or president to interpret the meaning of laws.
Shin-ryoku ink by Pilot in the color iroshizuku: forest green.
ChatGPT fills out one of my questions with great detail!
A toddler's puzzle of a hedgehog. Solved, but with its head turned inward.
LinkedIn notification saying that Pamela Anderson mentioned me in a comment.
I asked why it thought it was from Utrecht University, and in the answer it says it is highly likely that it is, based on 4 clues in the text (mention of an Utrecht group, mention of an exam, structure looks like educational material and the language). Not a very bad assumption, but it is, in fact, wrong.
A full Malieveld
Full House at the Leiden University Wijnhaven campus in the Hague.
Nature and a windmill in fog with a rising sun.
One large, and about 20 tiny little spiders in a cupboard.
Three solar panels on our shed.
The book Moral Ambition by Bregman, next to the book by Weski.
Ravens game on TV
A Facebook reminder on academic papers that were published without main players from the onset of the project.
A network of courses at the Amsterdam of College of Law.
Essential Science Indicators
The number of participants over the years, starting at 27 in 2011, rising to a peak of 1600 in 2015, then gradually decreasing to a mere 283 last year. A weird drop in 2017 also ...
Furniture and boxes
Samenvatting partijprogramma PVV.