iiinova — where your digital self keeps evolving

Niko @nikosarcevic.com · 10/06/2026

I’m doing science physics

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Niko @nikosarcevic.com · 09/06/2026

I’ve been obsessed with Langewiesche’s writing since I discovered his @theatlantic.com articles. If someone had told me I’d be into a book about shipping and maritime stuff, man… He was such a master of narrative nonfiction that he can make any subject fascinating.

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Reposted by Niko

AstroArxiv @astroarxiv.bsky.social · 29/05/2026

cloelib: A Flexible Python Library for Computing Cosmological Observables in the Euclid Era. Marco Bonici et. al. arxiv.org/abs/2605.23839

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Niko @nikosarcevic.com · 25/05/2026

Agree on both counts!

Niko @nikosarcevic.com · 25/05/2026

Over on Twitter a debate of medical doctor vs PhD and who is in the “right” is peeking its head again. I guess we have to have it at least once a year 😂 For me it’s always an excuse to pull this gem out Also: RIP Andre. What an actor he was. Pembleton forever! youtu.be/xYOK-2Q75wE?...

youtu.be

a PhD is a doctorate, it is literally describing a doctor -- Brooklyn 99

YouTube video by Estefanía Torres

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Niko @nikosarcevic.com · 20/05/2026

And yes it is arXiv trying to handle the ai slop hallucinated refs and their new ban policy

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Niko @nikosarcevic.com · 20/05/2026

Heyyyy!!!! Hope you are doing well Re arXiv: you should see meltdowns on twitter it’s ridiculous

Niko @nikosarcevic.com · 07/05/2026

If someone told me 10 years ago that I’d be giving a talk at @scipyconf.bsky.social, I would’ve called them crazy. I’m incredibly honored that the SciPy organizers think derivkit is worthy of a talk! Thank you, SciPy team 🥹🥹🥹🥹

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Reposted by Niko

Petnica Summer Institute @psi-petnica.bsky.social · 23/04/2026

🚨🚨🚨 Only a few weeks left to apply for summer schools in physics (MSc / junior PhD): • Dark Universe - May 10 • Quantum Gravity & Quantum Chaos - May 10 • Scientific ML - May 15

psi.petnica.rs

PSI – Petnica Summer Institute

Intensive summer schools in theoretical physics, phenomenology, quantum technologies, and machine learning at the Petnica Science Center, Serbia.

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Niko @nikosarcevic.com · 21/04/2026

Thanks! Every analysis in cosmology is blinded in some way (catalog level, cov matrix level, or data vector level). Bit it is very difficult because of the nature of the problem. I led a discussion on it with Angus Wright in one of Cosmology from Home conferences

Niko @nikosarcevic.com · 21/04/2026

Fresh on @arxiv 🥳🥳🥳🥳 Blinding in cosmology is especially challenging: unlike particle physics, our signal is statistical, subtle, and extracted through a long inference chain. Excited to share the official LSST DESC tool for blind analyses: arxiv.org/abs/2604.18111

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Niko @nikosarcevic.com · 17/04/2026

How awesome is this?!

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Niko @nikosarcevic.com · 01/04/2026

😂😂😂😂😂😂😂 Well we do know our instruments much better than we understand the physics on small scales

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Niko @nikosarcevic.com · 24/03/2026

Working on the problem from two completely different angles is the best part of this project we’ve been hammering for months Matthijs: pristine, elegant, mathematically flawless Niko: “okay but imagine the posterior is a traffic cone…” Somehow… we are both correct 🤣🤣

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Niko @nikosarcevic.com · 21/03/2026

Ah Right right — it’s his voice yes. I mean he does have a nice voice so idk (not that I would want those self hep things personally but I do get the appeal)

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Niko @nikosarcevic.com · 21/03/2026

Wut? I don’t follow him so I have no clue. Horrible if true I only became a fan because of True Detective and The Gentlemen

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Niko @nikosarcevic.com · 21/03/2026

Apparently Matthew McConaughey was at Duke today and I missed meeting him because I was stuck in telecons/working from home This is NOT alright alright alright I’m really upset

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Niko @nikosarcevic.com · 16/03/2026

Minor pet peeve: describing ΛCDM-based analyses as having the “potential to discover new physics.” They can reveal tensions or inconsistencies that may motivate extensions to the model — but that’s not the same as discovering new physics. Cmon my man, tone that down

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Niko @nikosarcevic.com · 14/03/2026

10/10 recommend. It’s really good quality — I have a few shirts and a hoodie. Really soft nice cotton, very pleasant to wear

Niko @nikosarcevic.com · 14/03/2026

Happy bday, arXiv! You are the best! Funny coincidence is that I chose to wear one of my arXiv shirts (which are top quality btw! Hoodies as well, highly recommend)

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Niko @nikosarcevic.com · 11/03/2026

I am a science machine 💪💪💪💪 4th paper fresh on the @arxiv.bsky.social this year 🥳🥳🥳 arxiv.org/pdf/2603.09973

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Niko @nikosarcevic.com · 05/03/2026

I was in a clusters telecon today (not my usual working group) and am so beyond impressed by the quality of plots people were showing. I find it so refreshing to see there are people out there who care about communicating their research

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Reposted by Niko

AstroArxiv @astroarxiv.bsky.social · 26/02/2026

Impact and interplay of $Λ$CDM analysis choices for LSST cosmic shear. N. C. Robertson et. al. arxiv.org/abs/2602.21863

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Will do! It’s still cold here but expecting temps in the 80s this week and in here for it

Starting the day shearing dead weeds in the forest and cutting through mountain mint — that sharp minty scent mixed with damp, rotting leaves — pure peace for the soul 🌿 And catching up with the wonderful folks over at @DukeLemurCenter is just 👌chefs kiss

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Also Derivkit assumes you have your model and covariance and if you have that (which you obviously do), you can go wild with forecasts (just choose your derivative method wisely — consult workflows page in the docs)

You are welcome! If you need any clarification please do not hesitate to contact me. I’d start with either example pages (forecasting) or workflows page (that one has a FAQ and some decision guidance)

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