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David Rach

@davidrach.bsky.social

Immunology PhD student @UMBaltimore. Views are my own. Favorite rabbit holes include #flowcytometry #rstats #bioconductor, with dashes of #coffee #kayaking #birding #ultrunning #languages. RPCV Ghana 16->18, TCK Mexico 96->11 https://github.com/DavidRach/

385 Followers  |  394 Following  |  51 Posts  |  Joined: 31.07.2023  |  2.0505

Latest posts by davidrach.bsky.social on Bluesky

Superior batch alignment and hyper-dimensional cytometry representations allow ultra-sensitive classification of disease phenotypes
Andrews, T. D., Davies, A. R. et al.
Paper
Details
#UltraSensitiveDiseaseClassification #HyperDimensionalCytometry #BatchAlignmentInResearch

01.08.2025 16:01 β€” πŸ‘ 0    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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GitHub - flatironinstitute/stan-playground: Run Stan models in the browser Run Stan models in the browser. Contribute to flatironinstitute/stan-playground development by creating an account on GitHub.

πŸ’» This was also my first time using Stan playground (github.com/flatironinst...) to teach a class! Thank you Brian Ward for creating this tool and helping me set it up for the class!

28.07.2025 15:31 β€” πŸ‘ 9    πŸ” 5    πŸ’¬ 0    πŸ“Œ 0
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How Quarto embed fixes data science storytelling | Emily Riederer Literate programming excels at capturing our stream of conscience. Our stream of conscience does not excel at explaining the impact of our work. Notebooks enable some of data scientists’ worst tendenc...

Technical writing is hard bcs "writing is thinking" but we often should tell our story not in the order we worked. Solution? I wrote a quick post on how @quarto.org 's embed shortcodes can reframe technical writing as reproducible evidence curation

www.emilyriederer.com/post/quarto-...

🧡 (1/n)

27.07.2025 13:14 β€” πŸ‘ 103    πŸ” 22    πŸ’¬ 4    πŸ“Œ 1
PNAS Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

This is a bit of weird analysis - and looking through it I don’t necessarily recall seeing the same stuff. Fetal effector T cells are prone to death in vitro and there are relatively few in vivo. Most are treg (foxp3+) www.pnas.org/doi/10.1073/...

26.07.2025 10:08 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
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Grizzlies Were Raiding Montana Farms. Then Came Some Formidable Dogs.

www.nytimes.com/2025/07/22/c...

24.07.2025 13:57 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Reminders for researchers doing flow cytometry during the summer:

Hot weather can mess with your flow cytometry results. Keep an eye on the following:

(1/6)

22.07.2025 06:29 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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Importing Data with Python Importing data is a key step in the data science workflow. Here we compare data import for two key Python data-frame libraries - Polars and Pandas.

Importing data is a key step in the data science workflow. In our latest Python blog post, we compare this process for two key libraries - Polars and Pandas - emphasising how to convert to the correct data-type and why you should validate the structure and content of the imported data.

#rstats

17.07.2025 10:24 β€” πŸ‘ 5    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
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Scientist’s cat, again, helps discover new virus - UF Health GAINESVILLE, Fla. β€” Pepper, the pet cat who made headlines last year for his role in the discovery of the first jeilongvirus found in the U.S., is at it again.…

Is Pepper co-author for providing the research material, or just mentioned in the acknowledgments? πŸ€” #virus #virology #cat #immunosky

ufhealth.org/news/2025/sc...

16.07.2025 13:59 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1
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Bioconductor: Planning a third decade of comprehensive support for genomic data science This opinion piece discusses the Bioconductor project for open-source bioinformatics and the engineering concepts underlying its effectiveness to date. Since the inception of Bioconductor in 2002 with...

www.cell.com/patterns/ful...

#bioconductor #rstats

16.07.2025 11:57 β€” πŸ‘ 14    πŸ” 9    πŸ’¬ 1    πŸ“Œ 0

Mark Walport begins conference by stating plainly that pre-pub peer review cannot reasonably be expected to assess quality of papers with 100 page supplements and terabytes of data

14.07.2025 08:52 β€” πŸ‘ 47    πŸ” 6    πŸ’¬ 6    πŸ“Œ 3
Access gated raw data - EasyFLowQ

Hi bluesky! Here are new improvements to the flowcytometry app I made during my time in @elowitzlab.bsky.social. Now it supports exporting gated events as npy and mat. So you can gate data in your favorite graphic interface, then analyze them with python or Matlab! ym3141.github.io/EasyFlowQ/Ra...

14.07.2025 21:34 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Follow @econmaett.bsky.social, it's how I see most R things daily πŸ˜‚ Also add the #rstats feed

14.07.2025 15:39 β€” πŸ‘ 7    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

New #rstats blog up!

solomonkurz.netlify.app/blog/2025-07...

This is the second post in the series where we use {brms} to learn {Stan} code. This time we review matrix notation, model matrices, and a new class of distribution functions in Stan.

14.07.2025 14:12 β€” πŸ‘ 64    πŸ” 15    πŸ’¬ 2    πŸ“Œ 1



ImmuneFM: Pre-training Foundation Model from Cytometry Data for Immunology Research

https://www.biorxiv.org/content/10.1101/2025.07.09.664020v1

14.07.2025 10:42 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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GatingTree: Pathfinding Analysis of Group‐Specific Effects in Cytometry Data Advancements in cytometry technologies have led to a remarkable increase in the number of markers that can be analyzed simultaneously, presenting significant challenges in data analysis. Traditional ....

πŸš€ Our next-generation cytometry tool GatingTree now published in #CytometryPartA!
πŸ”— onlinelibrary.wiley.com/doi/10.1002/...

GatingTree enables systematic analysis of high-dimensional flow cytometry data, without relying on dimensionality reduction. πŸ’»

13.07.2025 12:24 β€” πŸ‘ 4    πŸ” 3    πŸ’¬ 1    πŸ“Œ 0
Hexagonal logo for BioCAsia 2025 in Adelaide, featuring a stylized landscape with vineyards, mountains, a convention center, a grape cluster, and Bioconductor logo

Hexagonal logo for BioCAsia 2025 in Adelaide, featuring a stylized landscape with vineyards, mountains, a convention center, a grape cluster, and Bioconductor logo

πŸ“£ BioCAsia 2025: Call for Workshops

Join the Bioconductor stream at ABACBS 2025 in Adelaide!

Submit your hands-on workshop EOI by August 1.

Flexible 90-min blocks.

➑️ www.abacbs.org/abacbs-2025-...

#Bioconductor #BioCAsia2025 #RStats

11.07.2025 09:04 β€” πŸ‘ 7    πŸ” 3    πŸ’¬ 0    πŸ“Œ 1

Join the Bioconductor Developer Forum - R & Rust in Bioinformatics

πŸ—“οΈ 28 July, 17:00–18:00 CEST

Discussing extendr, Rust packages, and real-world use cases.

πŸ”— blog.bioconductor.org/posts/2025-0...

#Bioconductor #RStats #RustLang #Bioinformatics

11.07.2025 12:46 β€” πŸ‘ 13    πŸ” 7    πŸ’¬ 0    πŸ“Œ 0
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Projects BioHackathon Europe projects

πŸ’»πŸ§¬ Join the Bioconductor project at BioHackathon Europe 2025 (Berlin, Nov 3–7)!
In-person registration closes Tuesday, July 15
Project: github.com/elixir-europ...
#BioHackathon #Bioinformatics #Bioconductor

11.07.2025 15:15 β€” πŸ‘ 6    πŸ” 4    πŸ’¬ 0    πŸ“Œ 1
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Parallel processing in purrr 1.1.0 The functional programming toolkit for R gains new capabilities for parallel processing and distributed computing using mirai.

#tidyverse purrr 1.1.0 is out - now with parallel processing!

Scale your #rstats map operations reliably and efficiently across multiple cores and even distributed systems.

Powered by the mirai framework, this unlocks new levels of performance.

Read more at:
www.tidyverse.org/blog/2025/07...

10.07.2025 22:35 β€” πŸ‘ 190    πŸ” 60    πŸ’¬ 5    πŸ“Œ 4
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Which Kind of Science Reform What hope is there for science reform, if we can't agree on what to reform? Right now, principles are more important than practices.

How can we reform science? I have some ideas. But I am not sure you’ll like them, because they don’t promise much. elevanth.org/blog/2025/07...

09.07.2025 13:40 β€” πŸ‘ 270    πŸ” 129    πŸ’¬ 17    πŸ“Œ 44
Probabilistic migration events drive transient tissue residency of lymphocytes during homeostasis Tissue-resident lymphocytes form a phenotypically and functionally distinct analog to the corresponding circulatory lymphocyte populations. Residential CD8 T cells, in particular, are identified as having prolonged residence in the tissues and key functions in recall responses at tissue-environmental interfaces, although the dwell time in individual tissues has yet to be resolved. Residential CD4 T cells, regulatory T cells, B cells, and NK cells have been demonstrated to share phenotypic properties with residential CD8 T cells, but the migratory kinetics are even more poorly defined. Here we used probabilistic modelling on a large parabiosis dataset, covering multiple time-points and tissues, to calculate migration kinetics and dwell times of multiple lymphocyte subsets across a diverse set of tissues. Markov chain modelling identified distinct cell type-specific and tissue-specific residency patterns. The liver and gut were prone to prolonged residency compared to other tissue types, and a hierarchy of residency was observed with CD8 T cells and NK cells demonstrating longer residency than CD4 conventional T cells and regulatory T cells, which in turn resided in tissues longer than B cells. With few exceptions, however, average residency was at least an order of magnitude shorter than the life-span of the mouse, indicating a more dynamic form of steady-state tissue residency than usually assumed. Together these data provide a comprehensive model of a pan-tissue shared program in lymphocyte tissue residence, as well as identifying cell type- and organ-specific modification of the migratory kinetics. ### Competing Interest Statement The authors have declared no competing interest. Wellcome Trust, https://ror.org/029chgv08, 222442/Z/21/Z European Research Council, TissueTreg

A #flowcytometry, #rstats and #Stan pre-print! 😍

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

09.07.2025 11:11 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I know the numbers are still rather small, but now do Positron!

07.07.2025 19:12 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Bioconductor and ggplot2 4.0.0: What’s Changing and How to Prepare – Bioconductor community blog Preparing for the upcoming update - key changes, potential breakages, and what developers and users can do

πŸ“ New blog post: Bioconductor and ggplot2 4.0.0 - What’s Changing and How to Prepare

A major ggplot2 update is coming and may impact Bioconductor packages. What’s changing, how to test, and where to get help πŸ‘‰ blog.bioconductor.org/posts/2025-0...

#Bioconductor #RStats

07.07.2025 12:36 β€” πŸ‘ 15    πŸ” 9    πŸ’¬ 1    πŸ“Œ 0
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Bioconductor and ggplot2 4.0.0: What’s Changing and How to Prepare – Bioconductor community blog Preparing for the upcoming update - key changes, potential breakages, and what developers and users can do

ggplot2 4.0.0 is coming soon, and is moving some of the internals from S3 to the new S7 OOP system. This is worth a read if you're developing packages with ggplot2 (bioconductor or otherwise) blog.bioconductor.org/posts/2025-0... #Rstats

07.07.2025 15:31 β€” πŸ‘ 21    πŸ” 10    πŸ’¬ 0    πŸ“Œ 0
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The Hunt for a 316-Year-Old Stradivarius Stolen in the Fog of War

www.nytimes.com/2025/07/06/a...

07.07.2025 01:32 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

Bookmarking β˜• The BUV615 negative spill could probably still use some additional tinkering with brighter controls, doesn't look to be entirely UDS πŸ§πŸ˜‚

02.07.2025 11:27 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Single Benzene Fluorophores: Elucidating the molecular structural origin of efficient emission across solid and solution phases
...joint paper with Jinsang Kim www.mse.engin.umich.edu/people/jinsang & Minsang Kwon kwonlab.snu.ac.kr

doi.org/10.1038/s414...

#compchemsky #chemsky #PiSky

01.07.2025 15:06 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

It just happened again, as it happens multiple times each year: Someone's student asked me to look at their model output, I asked why they chose those variables, they say "these variables might influence outcome". This is a failure of training in biology, not student's fault. Committee is no better!

27.06.2025 07:42 β€” πŸ‘ 60    πŸ” 11    πŸ’¬ 5    πŸ“Œ 0
Tandem Dyes
YouTube video by International Clinical Cytometry Society Tandem Dyes

πŸš€New Video Alert! Don't Miss It! πŸš€
The ICCS Outreach Committee has released a new video on tandem dyes in flow cytometry. More videos coming soon, so please *subscribe* to our YouTube channel so you don't miss any!
Watch it now at www.youtube.com/watch?v=5cV7...
#PathSky #Flowcytometry #Hemepath

27.06.2025 17:12 β€” πŸ‘ 3    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

.... LibreOffice it is then ....

27.06.2025 14:05 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

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