Marcel Haas 🟥
@harcel.bsky.social
Data scientist: asst prof in population health @ Leiden University Medical Center. Former astrophysicist: extronomer! Beer sommelier. Pythonista. Aspiring Bayesian. Dad. Go/Baduk player.
Reassembled! A.k.a. the "before" picture I forgot to take.
November 17, 2025 at 10:09 PM
Reassembled! A.k.a. the "before" picture I forgot to take.
I've had this puzzle box in possession for a few years now, but finally gave it a try! Nice challenge, with some fun little twists and turns. Good thing: I have two more!
This was the Cluebox Nautilus by iDventure, bought in a kickstarter (along with two others). Now to reassemble!
This was the Cluebox Nautilus by iDventure, bought in a kickstarter (along with two others). Now to reassemble!
November 17, 2025 at 9:42 PM
I've had this puzzle box in possession for a few years now, but finally gave it a try! Nice challenge, with some fun little twists and turns. Good thing: I have two more!
This was the Cluebox Nautilus by iDventure, bought in a kickstarter (along with two others). Now to reassemble!
This was the Cluebox Nautilus by iDventure, bought in a kickstarter (along with two others). Now to reassemble!
This is quite a fun tabletop escape room experience. They come in English, too!
November 16, 2025 at 9:47 PM
This is quite a fun tabletop escape room experience. They come in English, too!
Is this a check to see if I can order one more beer?
October 3, 2025 at 6:16 PM
Is this a check to see if I can order one more beer?
I'm pretty sure Gemini didn't see this equation millions of times in training.
October 3, 2025 at 5:52 PM
I'm pretty sure Gemini didn't see this equation millions of times in training.
Ok, that juniper "after"-pic deserved an upgrade.
August 24, 2025 at 7:10 PM
Ok, that juniper "after"-pic deserved an upgrade.
A #bonsai weekend. I did some styling on nursery stock Hinoki Cypress and a pre-bonsai Chinese Juniper, and obtained a Japanese Black Pine (Kotobuki) styled by professionals.
August 24, 2025 at 3:42 PM
A #bonsai weekend. I did some styling on nursery stock Hinoki Cypress and a pre-bonsai Chinese Juniper, and obtained a Japanese Black Pine (Kotobuki) styled by professionals.
Not so smart after all, yet.
August 21, 2025 at 8:00 AM
Not so smart after all, yet.
There it is! Pre- #Bonsai number 1. A juniper with nice trunk movement. Work will be done soon. First I need to think about what I want for this tree and not let it die in the meantime.
I bought fertilizer, scissors and wire. The shop closed an hour after I arrived, which probably was a good thing.
I bought fertilizer, scissors and wire. The shop closed an hour after I arrived, which probably was a good thing.
August 16, 2025 at 6:21 PM
There it is! Pre- #Bonsai number 1. A juniper with nice trunk movement. Work will be done soon. First I need to think about what I want for this tree and not let it die in the meantime.
I bought fertilizer, scissors and wire. The shop closed an hour after I arrived, which probably was a good thing.
I bought fertilizer, scissors and wire. The shop closed an hour after I arrived, which probably was a good thing.
Father's Day present!
June 29, 2025 at 11:42 AM
Father's Day present!
And not too far from it...
May 17, 2025 at 5:10 PM
And not too far from it...
I guess you do have a choice in how you frame the cry baby's birthday party.
May 3, 2025 at 5:44 AM
I guess you do have a choice in how you frame the cry baby's birthday party.
Oh look at that new daily companion!
A Paper Republic Portfolio, AT.
A Paper Republic Portfolio, AT.
April 23, 2025 at 5:31 PM
Oh look at that new daily companion!
A Paper Republic Portfolio, AT.
A Paper Republic Portfolio, AT.
Time for a re-read!
March 29, 2025 at 12:06 PM
Time for a re-read!
You must by fucking shitting me, Facebook. When I get back home, I'll make work of permanently leaving.
February 26, 2025 at 4:42 PM
You must by fucking shitting me, Facebook. When I get back home, I'll make work of permanently leaving.
Apparently we need to explain even to the IMF (a body that is supposed to understand economics, presumably) that if your essential motive is to make a profit, that it is rather impossible that we can "serve the best interests of society". The two sentences directly contradict each other.
February 20, 2025 at 7:45 AM
Apparently we need to explain even to the IMF (a body that is supposed to understand economics, presumably) that if your essential motive is to make a profit, that it is rather impossible that we can "serve the best interests of society". The two sentences directly contradict each other.
Frankly, I have no idea why this isn't headlining in the Netherlands. This seems like a huge deal to me.
February 19, 2025 at 6:29 AM
Frankly, I have no idea why this isn't headlining in the Netherlands. This seems like a huge deal to me.
I bought this one just past week. I'm on the same path, I'm afraid...
January 26, 2025 at 6:27 PM
I bought this one just past week. I'm on the same path, I'm afraid...
I swear, a teaching portfolio (in Dutch) can just be written by ChatGPT. When they ask wide-open questions, I can give vague answers!
January 14, 2025 at 9:16 AM
I swear, a teaching portfolio (in Dutch) can just be written by ChatGPT. When they ask wide-open questions, I can give vague answers!
Didn't necessarily expect this to happen.
And indeed, it didn't.
And indeed, it didn't.
December 27, 2024 at 8:37 AM
Didn't necessarily expect this to happen.
And indeed, it didn't.
And indeed, it didn't.
It's said to be hallucination free. Maybe it is, but is does make assumptions. Example: I pasted in all the notes (actually a summary of the material) of my beer sommelier course. The summary started by "A Utrecht University course on beer and brewing", so I was curious (see alt text, also):
November 29, 2024 at 8:22 AM
It's said to be hallucination free. Maybe it is, but is does make assumptions. Example: I pasted in all the notes (actually a summary of the material) of my beer sommelier course. The summary started by "A Utrecht University course on beer and brewing", so I was curious (see alt text, also):