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Kenny Pavan

@kennypavan.com

Science, nature photos, mental-health advocate, and star trek ๐Ÿ–– Bioinformatics | ML | PhD Candidate @ OHSU studying synaptic connectivity. myOwnOpinions=True

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17.11.2024
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Latest posts by Kenny Pavan @kennypavan.com

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Bluesky Map Interactive map of 3.4 million Bluesky users, visualised by their follower pattern.

I made a map of 3.4 million Bluesky users - see if you can find yourself!

bluesky-map.theo.io

I've seen some similar projects, but IMO this seems to better capture some of the fine-grained detail

08.02.2026 22:59 ๐Ÿ‘ 7212 ๐Ÿ” 2165 ๐Ÿ’ฌ 659 ๐Ÿ“Œ 4577

thereโ€™s nothing better than reaching into a bag of pistachios and pulling out one thatโ€™s already open...

...thereโ€™s also nothing worse than reaching into that same bag and pulling out just an empty shell.

08.02.2026 20:13 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Mars Express image of Olympus Mons volcano showing frost, 2024

Mars Express image of Olympus Mons volcano showing frost, 2024

In the difficult years ahead, we should remember that the snows of Olympus lie silent beneath the stars, waiting for our grandchildren.

- Arthur C. Clarke

08.01.2026 15:38 ๐Ÿ‘ 412 ๐Ÿ” 76 ๐Ÿ’ฌ 13 ๐Ÿ“Œ 5
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Happy new year nerds! Episode 2 is out! Go listen to my conversation with Dr. Swetha Murthy and learn how she found her confidence through her science ๐Ÿงฌ Available now everywhere you listen to podcasts!

01.01.2026 23:36 ๐Ÿ‘ 2 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Austin Schubert (Saunders Lab) won "Most Innovative Approach" at the Cure SYNGAP1 conference. His poster was titled "Brainโ€“wide discovery of when, where, and how SYNGAP1 haploinsufficiency alters neurodevelopment through single cell RNA profiling.โ€
cc: @trill-nye.bsky.social @your-arpy.bsky.social

30.12.2025 23:27 ๐Ÿ‘ 12 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Full house for our Bi[o]hub workshop on Day 3!
Communities arenโ€™t just built, they are co-created.
Together, weโ€™re shaping an open, connected world of all-things-single-cell research, where sharing tools and ideas drives discovery.

20.11.2025 00:34 ๐Ÿ‘ 5 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Screenshot of blog post at https://dirk.eddelbuettel.com/blog/2025/10/26#duckdb-mlpack_0.0.2 announcing that mlpack is now a duckdb community extension

Screenshot of blog post at https://dirk.eddelbuettel.com/blog/2025/10/26#duckdb-mlpack_0.0.2 announcing that mlpack is now a duckdb community extension

duckdb-mlpack 0.0.2: mlpack is now a duckdb community extension
Bringing mlpack machine learning to duckdb SQL
dirk.eddelbuettel.com/blog/2025/10...

26.10.2025 13:58 ๐Ÿ‘ 28 ๐Ÿ” 9 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Human brain cell types shape host-rabies virus transcriptional interactions revealing a preexisting pro-viral astrocyte subpopulation How virus-host cell interactions and innate immune antagonism shape neurotropic infection dynamics across diverse brain cell types is largely unknown.โ€ฆ

Huge congratulations to my awesome lab mates, @your-arpy.bsky.social, and their collaborators @pasteur.fr on publishing their new paper showing how rabies hijacks brain cells and revealing a rare astrocyte subtype that boosts viral transcription ๐Ÿงช #SingleCell

www.sciencedirect.com/science/arti...

26.08.2025 15:31 ๐Ÿ‘ 3 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Probably just the duck from DuckDb running a quick query. It'll be gone soon.

15.08.2025 00:16 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Happy to share my first publication! AnnSQL leverages DuckDB to create a relational database based on each AnnData layer, enabling fast queries on massive, atlas-sized single-cell datasets. ๐Ÿงฌ๐Ÿ–ฅ๏ธ

#Bioinformatics #SingleCell #DuckDb

06.05.2025 14:20 ๐Ÿ‘ 18 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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GitHub - ArpiarSaundersLab/annsql: The AnnSQL package enables SQL based queries on AnnData objects. The AnnSQL package enables SQL based queries on AnnData objects. - ArpiarSaundersLab/annsql

We're excited to offer the first #SQL based single-cell exploration and analysis tool. If you encounter anomalies or bugs, please report to the AnnSQL GitHub issue board: github.com/ArpiarSaunde...

24.03.2025 17:29 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

๐—ฆ๐—ฝ๐—ฒ๐—ฒ๐—ฑ: AnnSQL was built for querying large datasets.

tl;dr; If your dataset is > ~100k cells or out of memory, consider using AnnSQL. If your dataset is < ~100k cells or within memory, Scanpy or Seurat are the winners.

24.03.2025 17:29 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐—œ๐—ป๐˜๐—ฒ๐—ฟ๐—ผ๐—ฝ๐—ฒ๐—ฟ๐—ฎ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜†: AnnSQL databases (.asql) can be shared and also play nicely with a variety of languages; even R!

docs.annsql.com/interoperabi...

24.03.2025 17:29 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐— ๐—ฒ๐—บ๐—ผ๐—ฟ๐˜†: Using the #DuckDb in-process database engine behind the scenes, AnnSQL is memory respectful. AnnSQL also enabled a chunking parameter for all preprocessing methodsโ€” making it a powerful ally capable of processing massive datasets on a laptop.

24.03.2025 17:29 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐——๐—ผ๐—ฐ๐˜‚๐—บ๐—ฒ๐—ป๐˜๐—ฎ๐˜๐—ถ๐—ผ๐—ป: Tutorials and API usage can be viewed at: docs.annsql.com

24.03.2025 17:29 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐—ก๐—ฒ๐˜„ ๐—™๐—ฒ๐—ฎ๐˜๐˜‚๐—ฟ๐—ฒ๐˜€:
- Save raw layer
- Filter by cell & gene counts
- Highly variable gene selection
- PCA (experimental)
- Leiden clustering, UMAP, Diff Expression
- Various plotting utilities

24.03.2025 17:29 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐—ฃ๐—ฟ๐—ฒ๐—ฝ๐—ฟ๐—ถ๐—ป๐˜: In our updated preprint, we runtime profile filters vs queries using AnnSQL, AnnData, and Seurat.

www.biorxiv.org/content/10.1...

24.03.2025 17:29 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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GitHub - ArpiarSaundersLab/annsql: The AnnSQL package enables SQL based queries on AnnData objects. The AnnSQL package enables SQL based queries on AnnData objects. - ArpiarSaundersLab/annsql

๐—”๐—ป๐—ป๐—ฆ๐—ค๐—Ÿ v1 has landed! Explore atlas sized single-cell datasets, with minimal resources using SQL that's powered by the #DuckDb database engine. #SingleCell ๐Ÿงฌ ๐Ÿ–ฅ๏ธ ๐Ÿ––

github.com/ArpiarSaunde...

24.03.2025 17:29 ๐Ÿ‘ 7 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1

Happy to see lots of DuckDuckGoers. It's also worth considering Brave search. ๐Ÿฆ

search.brave.com

14.02.2025 21:29 ๐Ÿ‘ 18 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Whoa, that's dedication ๐Ÿ’ช Hope you find what you're looking for soon!

08.02.2025 04:15 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Currently using ScEasy or SeuratDisk. Both are great tools and I've had some success using both, however, they sometimes can fail depending on the dataset and the layers present. The interoperability page you linked has some options I've yet to explore. Thank you for sharing!

05.02.2025 04:26 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I spend way too much time converting AnnData objects into Seurat objects and haven't found a tool or pipeline that just works, while retaining all data layers. What are some tools or pipelines to ease this process? ๐Ÿงฌ ๐Ÿ–ฅ๏ธ #SingleCell

04.02.2025 20:45 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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By extension, Wikipedia says DeepSeek trained on its data and asks for $5 donation.

29.01.2025 16:58 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Learning about some of the magic behind the #DeepSeek R1 paper: "Optimisations actually began at chip level, below even CUDA, with DeepSeek engineers writing assembly language to overcome H800 bandwidth throttling. This in itself is an extraordinary technical feat"

28.01.2025 11:39 ๐Ÿ‘ 46 ๐Ÿ” 3 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 1
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AnnSQL: A Python SQL-based package for large-scale single-cell genomics analysis on a laptop As single-cell genomics technologies continue to accelerate biological discovery, software tools that use elegant syntax and minimal computational resources to analyze atlas-scale datasets are increas...

SQL is way underappreciated in #bioinfo. Our lab just dropped a preprint for a tool (AnnSQL) that uses DuckDb for single-cell analysis.

www.biorxiv.org/content/10.1...

28.01.2025 03:53 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Usually I try to reduce it to an easily digestible analogy. Something like... Biology is like a giant puzzle and we use computers to try and put all the pieces together.

28.01.2025 03:49 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

โ€œItโ€™s easier to fool a man than to convince him that heโ€™s been fooled.โ€ - Mark Twain

Well, someone tried to tell me that Mark Twain never actually said that, but I donโ€™t believe them

23.01.2025 14:28 ๐Ÿ‘ 13 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Commander Data from Star Trek The Next Generation as a change my mind meme stating "AI is just matrix multiplication. Change my mind."

Commander Data from Star Trek The Next Generation as a change my mind meme stating "AI is just matrix multiplication. Change my mind."

The numbers speak for themselves.

#startrek #startrekmemes #data #ML #AI ๐Ÿ––

22.01.2025 04:45 ๐Ÿ‘ 8 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Named after a sci-fi series whose most notable AI component, the Replicators, sought to consume humans and all other resources in the galaxy ๐Ÿ‘

22.01.2025 02:36 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A vending machine at OHSU Knight Cancer Research Building that is a pick up and dropoff for cancer risk screening.

A vending machine at OHSU Knight Cancer Research Building that is a pick up and dropoff for cancer risk screening.

Remember when vending machines were just for snacks? Happy to see OHSU researchers spearheading this screening program to help improve cancer early detection.

www.healthyoregonproject.com

๐Ÿงช #healthtech #genomics

17.01.2025 20:53 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0