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ahns

37 karma · joined August 15, 2022

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ahns··on Show HN: XY – A Fast, composable, GPU-accelerated interactive plotting library
Interesting; how do the examples compare to datashader?

Edit: for my use cases, I use napari (~1e7-8 points) if I need true interactivity; otherwise, datashader/holoviz, or even just fast-histogram's 2D histograms work.

For extremely large point clouds, these caveats[0] still apply. It irks me when people make dense scatterplots without any indication of just how dense some portions are.

Still, if it can indeed handle 1e10 points, that's pretty impressive.

[0]: https://datashader.org/user_guide/Plotting_Pitfalls.html

ahns··on How and why to take a logarithm of an image [video]
Hm, since I can't edit my comment: link to paper [0]

[0] https://pub.math.leidenuniv.nl/~smitbde/papers/2003-de_smit-...

ahns··on How and why to take a logarithm of an image [video]
One of Dutch artist M.C. Escher's works is a man is admiring a piece of art that itself depicts the building the (very same) man is in [0]. Escher left out the middle bit of the painting, probably since it's fairly complicated, putting his signature there instead. The video itself is about the complex analysis used to fill in that missing middle, based on a paper ~20 years ago.

[0] https://en.wikipedia.org/wiki/Print_Gallery_(M._C._Escher)

ahns··on U.S. Coast Guard will no longer classify swastikas, nooses as hate symbols
I'll just leave this here: https://en.wikipedia.org/wiki/Association_of_German_National...
ahns··on I did 98,000 Anki reviews. Anki is already dead
In my limited experience with static cards you really do just end up learning the "appearance" of a card, which is why I've been more successful with dynamic cards, like say a card showing a concordance randomly selected from a large corpus every review, showing the word I want to learn in various contexts.
ahns··on Brennan Center for Justice Report: The Campaign to Undermine the Next Election
Ha, looks like it's finally been flagged.
ahns··on New sphere-packing record stems from an unexpected source
The aforementioned trapezoidal rule (Tai's method): https://diabetesjournals.org/care/article/17/2/152/17985/A-M...
ahns··on AlphaGenome: AI for better understanding the genome
You may enjoy this, from a top-down experimental perspective (https://www.nikonsmallworld.com/galleries/small-world-in-mot...). Only a few entries so far show intracellular dynamics (like this one: https://www.nikonsmallworld.com/galleries/2024-small-world-i...), but I always enjoy the wide variety of dynamics some groups have been able to capture, like nervous system development (https://www.nikonsmallworld.com/galleries/2018-small-world-i...); absolutely incredible.
ahns··on Hurricane forecasters scrambling after sudden shutdown of key satellites
I suppose so, but this message from NOAA (https://www.ospo.noaa.gov/data/messages/2025/06/MSG_20250625...) shows a period of five days til shutdown, which seems extremely abrupt.
ahns··on RFK Jr.: HHS moves to restore public trust in vaccines
It's honestly impressive how efficiently and smoothly things are regressing.
ahns··on Cinematography of “Andor”
To add to this, non-exhaustively, from various other places including reddit:

Krennic's meeting on kalkite:

* structured like the https://en.wikipedia.org/wiki/Wannsee_Conference

* takes place at the https://en.wikipedia.org/wiki/Kehlsteinhaus

the Aldhani heist: https://en.wikipedia.org/wiki/1907_Tiflis_bank_robbery

Ferrix: https://en.wikipedia.org/wiki/The_Troubles

Vel Sartha:

* https://en.wikipedia.org/wiki/Rose_Dugdale

* https://en.wikipedia.org/wiki/Dolours_Price

* https://en.wikipedia.org/wiki/Red_Army_Faction

Kleya Marki: https://en.wikipedia.org/wiki/Noor_Inayat_Khan

the Dhanis: https://en.wikipedia.org/wiki/S%C3%A1mi_people#Discriminatio...

escape from Narkina 5:

* https://en.wikipedia.org/wiki/Maze_Prison_escape

* https://en.wikipedia.org/wiki/Mauthausen_concentration_camp

* https://en.wikipedia.org/wiki/Sobibor_uprising

* https://en.wikipedia.org/wiki/Vrba%E2%80%93Wetzler_report

Rix Road:

* https://en.wikipedia.org/wiki/Haymarket_affair

* https://en.wikipedia.org/wiki/Corporals_killings

* https://en.wikipedia.org/wiki/Shireen_Abu_Akleh#Funeral

Mon Mothma's speech: https://en.wikipedia.org/wiki/Otto_Wels#Speech_in_opposition

Ghormans: https://en.wikipedia.org/wiki/French_Resistance

Ghorman massacre:

* https://en.wikipedia.org/wiki/Bloody_Sunday_(1972)

* https://en.wikipedia.org/wiki/Tlatelolco_massacre

* https://en.wikipedia.org/wiki/Jallianwala_Bagh_massacre

* https://en.wikipedia.org/wiki/Rabaa_massacre

* and perhaps https://en.wikipedia.org/wiki/Silesian_weavers%27_uprising

Obviously the comparisons aren't exact, but it's clear the show had a great many sources of inspiration (or maybe history rhymes as it always has).

ahns··on The young, inexperienced engineers aiding DOGE
Well... there is also https://en.wikipedia.org/wiki/Nobel_disease
ahns··on Princeton astrophysicists re-imagine world map (2021)
Huh. I wonder what the difference is between this projection and the recentered [Nicolosi projection](https://en.wikipedia.org/wiki/Nicolosi_globular_projection), which has been around for way longer.
ahns··on Open-source could finally get the world’s microscopes speaking the same language
:/ [tell me about it...](https://paulbourke.net/dataformats/svs/)
ahns··on Open-source could finally get the world’s microscopes speaking the same language
As far as I know, not technically (although I haven't kept up in the area), but you can definitely sweep through a volumetric sample; there are microscopes that can for example illuminate a thin z-plane of a transparent sample and collect the image or those that can reject out-of-focus (off-z) light for a particular z-plane, then move to another z-plane, etc. and then generate a volume on the software side.
ahns··on Open-source could finally get the world’s microscopes speaking the same language
I work with microscopy data and we have to convert all the proprietary-but-still-readable-by-some-random-package image data generated by microscopy companies to ome-tiff/ome-zarr for it to be in a manageable format. I think it's great!
ahns··on FreeBSD spends 7% of its boot time running a bubblesort on its SYSINITs
Every few months or so I come back to that article always in awe
ahns··on Every Author as First Author
Ha, that reminds me of authorship being determined by a few rounds of SSB:

https://www.frontiersin.org/articles/10.3389/fimmu.2021.6526...

ahns··on Stitching – A Python package for fast and robust Image Stitching (Panoramas)
For microscopy images, have you tried ashlar?

https://github.com/labsyspharm/ashlar

It may help to have the microscope stage positions available in the OME metadata.