Jacob S. Zelko
@thecedarprince.bsky.social
🤓: Applied Math & Biomed Engineer; Research Affl @usask.ca
🔎: Health informatics, public health, applied cat. theory & open source/science
📝: EN/ES/DE/AR
🌐: Blog @ https://jacobzelko.com
📹: Twitch @ https://www.twitch.tv/thecedarprince
🔎: Health informatics, public health, applied cat. theory & open source/science
📝: EN/ES/DE/AR
🌐: Blog @ https://jacobzelko.com
📹: Twitch @ https://www.twitch.tv/thecedarprince
Me: High five, me! 👋
Old Me: Way to go, me! 👋
Shout out to the #julialang Discourse for being a treasure trove of info -- check it out if you have not!
Link: discourse.julialang.org
Anyhow, back to automating everything with my #raspberrypi
#meme #programming #academicsky
Old Me: Way to go, me! 👋
Shout out to the #julialang Discourse for being a treasure trove of info -- check it out if you have not!
Link: discourse.julialang.org
Anyhow, back to automating everything with my #raspberrypi
#meme #programming #academicsky
November 12, 2025 at 6:22 PM
Me: High five, me! 👋
Old Me: Way to go, me! 👋
Shout out to the #julialang Discourse for being a treasure trove of info -- check it out if you have not!
Link: discourse.julialang.org
Anyhow, back to automating everything with my #raspberrypi
#meme #programming #academicsky
Old Me: Way to go, me! 👋
Shout out to the #julialang Discourse for being a treasure trove of info -- check it out if you have not!
Link: discourse.julialang.org
Anyhow, back to automating everything with my #raspberrypi
#meme #programming #academicsky
Be me:
*Gets text notification*
Friend: I did a photo shoot for a piece of chalk.
Me: What?
Friend: It's Hagoromo.
Me: Understandable.
Friend: Wanna see the photos?
Me: YES.
#mathsky #scisky 🧪 #academicsky
*Gets text notification*
Friend: I did a photo shoot for a piece of chalk.
Me: What?
Friend: It's Hagoromo.
Me: Understandable.
Friend: Wanna see the photos?
Me: YES.
#mathsky #scisky 🧪 #academicsky
October 23, 2025 at 12:37 PM
Be me:
*Gets text notification*
Friend: I did a photo shoot for a piece of chalk.
Me: What?
Friend: It's Hagoromo.
Me: Understandable.
Friend: Wanna see the photos?
Me: YES.
#mathsky #scisky 🧪 #academicsky
*Gets text notification*
Friend: I did a photo shoot for a piece of chalk.
Me: What?
Friend: It's Hagoromo.
Me: Understandable.
Friend: Wanna see the photos?
Me: YES.
#mathsky #scisky 🧪 #academicsky
Markian & I worked with Katy Sadowski to create small OMOP CDM patient databases.
We discussed a #workflow to generate 1 million patient DB that went from ~220GB to ~20GB -- ~90% data reduction!
Goal was to provide researchers more realistic & performant @duckdb.org DBs for health informatics. 📊🩺
We discussed a #workflow to generate 1 million patient DB that went from ~220GB to ~20GB -- ~90% data reduction!
Goal was to provide researchers more realistic & performant @duckdb.org DBs for health informatics. 📊🩺
October 18, 2025 at 6:36 PM
Markian & I worked with Katy Sadowski to create small OMOP CDM patient databases.
We discussed a #workflow to generate 1 million patient DB that went from ~220GB to ~20GB -- ~90% data reduction!
Goal was to provide researchers more realistic & performant @duckdb.org DBs for health informatics. 📊🩺
We discussed a #workflow to generate 1 million patient DB that went from ~220GB to ~20GB -- ~90% data reduction!
Goal was to provide researchers more realistic & performant @duckdb.org DBs for health informatics. 📊🩺
My first time presenting on compositional public health outside a maths venue! Working on general slogans but we describe it as:
"Compositional public health empowers researchers to reclaim agency through abstraction in public health."
Time to run studies using AlgebraicJulia!
#mathsky #julialang
"Compositional public health empowers researchers to reclaim agency through abstraction in public health."
Time to run studies using AlgebraicJulia!
#mathsky #julialang
October 18, 2025 at 6:36 PM
My first time presenting on compositional public health outside a maths venue! Working on general slogans but we describe it as:
"Compositional public health empowers researchers to reclaim agency through abstraction in public health."
Time to run studies using AlgebraicJulia!
#mathsky #julialang
"Compositional public health empowers researchers to reclaim agency through abstraction in public health."
Time to run studies using AlgebraicJulia!
#mathsky #julialang
Great time @ohdsi.bsky.social Symposium!
Shared applied category theory ideas for #publichealth, won an award on data engineering using @duckdb.org, discussed multimodal health informatics & volleyball spiked folks with inflatable globes ( ✨OHDSI✨ things).
Details in 🧵
#medsky #openscience 🧪
Shared applied category theory ideas for #publichealth, won an award on data engineering using @duckdb.org, discussed multimodal health informatics & volleyball spiked folks with inflatable globes ( ✨OHDSI✨ things).
Details in 🧵
#medsky #openscience 🧪
October 18, 2025 at 6:36 PM
Great time @ohdsi.bsky.social Symposium!
Shared applied category theory ideas for #publichealth, won an award on data engineering using @duckdb.org, discussed multimodal health informatics & volleyball spiked folks with inflatable globes ( ✨OHDSI✨ things).
Details in 🧵
#medsky #openscience 🧪
Shared applied category theory ideas for #publichealth, won an award on data engineering using @duckdb.org, discussed multimodal health informatics & volleyball spiked folks with inflatable globes ( ✨OHDSI✨ things).
Details in 🧵
#medsky #openscience 🧪
That's a wrap for @juliacon.bsky.social 2025 for me! 💥
Great meeting JuliaHealth folks in person, having our first-ever Mini-Symposium, & planning for the ecosystem! Thanks to all who attended!
Ready to recharge & build #opensource!
P.S. Snagged our annual #julialang @frame.work group photo too!
Great meeting JuliaHealth folks in person, having our first-ever Mini-Symposium, & planning for the ecosystem! Thanks to all who attended!
Ready to recharge & build #opensource!
P.S. Snagged our annual #julialang @frame.work group photo too!
July 26, 2025 at 8:13 PM
That's a wrap for @juliacon.bsky.social 2025 for me! 💥
Great meeting JuliaHealth folks in person, having our first-ever Mini-Symposium, & planning for the ecosystem! Thanks to all who attended!
Ready to recharge & build #opensource!
P.S. Snagged our annual #julialang @frame.work group photo too!
Great meeting JuliaHealth folks in person, having our first-ever Mini-Symposium, & planning for the ecosystem! Thanks to all who attended!
Ready to recharge & build #opensource!
P.S. Snagged our annual #julialang @frame.work group photo too!
I absolutely adore the viz work of W. E. B. Dubois.
Not only was it pioneering the art of scientific communication but also paved the way for discussion around racism, disparities, and other quantities that we take for granted in sociological contexts.
Book: www.amazon.com/W-Boiss-Data...
Not only was it pioneering the art of scientific communication but also paved the way for discussion around racism, disparities, and other quantities that we take for granted in sociological contexts.
Book: www.amazon.com/W-Boiss-Data...
July 22, 2025 at 5:22 AM
I absolutely adore the viz work of W. E. B. Dubois.
Not only was it pioneering the art of scientific communication but also paved the way for discussion around racism, disparities, and other quantities that we take for granted in sociological contexts.
Book: www.amazon.com/W-Boiss-Data...
Not only was it pioneering the art of scientific communication but also paved the way for discussion around racism, disparities, and other quantities that we take for granted in sociological contexts.
Book: www.amazon.com/W-Boiss-Data...
After half a year of hobby #hacking, got an eink interface working w #julialang! 🎉
Now: tidy code & docs @ github.com/TheCedarPrin...
Future: custom dashboard making via @makie.org for
- UV Index 🌞
- Boston Sailing Info ⛵
- todo.txt Todo List 📝
- Google Calendar 🗓️
- 🤯
#maker #raspberrypi
Now: tidy code & docs @ github.com/TheCedarPrin...
Future: custom dashboard making via @makie.org for
- UV Index 🌞
- Boston Sailing Info ⛵
- todo.txt Todo List 📝
- Google Calendar 🗓️
- 🤯
#maker #raspberrypi
July 8, 2025 at 8:13 PM
After half a year of hobby #hacking, got an eink interface working w #julialang! 🎉
Now: tidy code & docs @ github.com/TheCedarPrin...
Future: custom dashboard making via @makie.org for
- UV Index 🌞
- Boston Sailing Info ⛵
- todo.txt Todo List 📝
- Google Calendar 🗓️
- 🤯
#maker #raspberrypi
Now: tidy code & docs @ github.com/TheCedarPrin...
Future: custom dashboard making via @makie.org for
- UV Index 🌞
- Boston Sailing Info ⛵
- todo.txt Todo List 📝
- Google Calendar 🗓️
- 🤯
#maker #raspberrypi
Finished a great week at the International Conference on Applied Category Theory! 🤓
Made great connections, reconnected w old friends, and came away w new ideas! Our talk on ACSets was a success - excited a/b the future of compositional data science & public health! 💥
#mathsky #academicsky 🧪
Made great connections, reconnected w old friends, and came away w new ideas! Our talk on ACSets was a success - excited a/b the future of compositional data science & public health! 💥
#mathsky #academicsky 🧪
June 9, 2025 at 4:40 PM
Finished a great week at the International Conference on Applied Category Theory! 🤓
Made great connections, reconnected w old friends, and came away w new ideas! Our talk on ACSets was a success - excited a/b the future of compositional data science & public health! 💥
#mathsky #academicsky 🧪
Made great connections, reconnected w old friends, and came away w new ideas! Our talk on ACSets was a success - excited a/b the future of compositional data science & public health! 💥
#mathsky #academicsky 🧪
Finishing my MS @ NEU soon!😱
Attended my last ML class & gave a 2 hour talk for CEPHIL @usask.bsky.social yesterday (on #publichealth #julialang & #opensource)
Today, accepted the Graduate Excellence in Research award from @northeasterncos.bsky.social!
Photo w bowtie to celebrate! 🥳
#academicsky
Attended my last ML class & gave a 2 hour talk for CEPHIL @usask.bsky.social yesterday (on #publichealth #julialang & #opensource)
Today, accepted the Graduate Excellence in Research award from @northeasterncos.bsky.social!
Photo w bowtie to celebrate! 🥳
#academicsky
April 17, 2025 at 9:28 PM
Finishing my MS @ NEU soon!😱
Attended my last ML class & gave a 2 hour talk for CEPHIL @usask.bsky.social yesterday (on #publichealth #julialang & #opensource)
Today, accepted the Graduate Excellence in Research award from @northeasterncos.bsky.social!
Photo w bowtie to celebrate! 🥳
#academicsky
Attended my last ML class & gave a 2 hour talk for CEPHIL @usask.bsky.social yesterday (on #publichealth #julialang & #opensource)
Today, accepted the Graduate Excellence in Research award from @northeasterncos.bsky.social!
Photo w bowtie to celebrate! 🥳
#academicsky
Oh I have heard of Newsboat! How do you use it in your flow?
My only problem is it breaks my flow since I tend to consume content in my browser; I use @vivaldibrowser.bsky.social RSS feed. Especially with image handling.
Although, when I want to go full minimalist, I will use w3m.
My only problem is it breaks my flow since I tend to consume content in my browser; I use @vivaldibrowser.bsky.social RSS feed. Especially with image handling.
Although, when I want to go full minimalist, I will use w3m.
March 28, 2025 at 6:07 PM
Oh I have heard of Newsboat! How do you use it in your flow?
My only problem is it breaks my flow since I tend to consume content in my browser; I use @vivaldibrowser.bsky.social RSS feed. Especially with image handling.
Although, when I want to go full minimalist, I will use w3m.
My only problem is it breaks my flow since I tend to consume content in my browser; I use @vivaldibrowser.bsky.social RSS feed. Especially with image handling.
Although, when I want to go full minimalist, I will use w3m.
Wrapping up Applied Math MS studies @northeasternu.bsky.social April. 🎓
Just got this top research honor from NEU -- apparently, I am the first MS Math student to win this! 😱
Thanks for your support!!! 🤗
Much excitement in the Zelko household this week! 🥳
#academicsky #mathsky #medsky 🧪 🛟🩺
Just got this top research honor from NEU -- apparently, I am the first MS Math student to win this! 😱
Thanks for your support!!! 🤗
Much excitement in the Zelko household this week! 🥳
#academicsky #mathsky #medsky 🧪 🛟🩺
March 27, 2025 at 2:46 PM
Wrapping up Applied Math MS studies @northeasternu.bsky.social April. 🎓
Just got this top research honor from NEU -- apparently, I am the first MS Math student to win this! 😱
Thanks for your support!!! 🤗
Much excitement in the Zelko household this week! 🥳
#academicsky #mathsky #medsky 🧪 🛟🩺
Just got this top research honor from NEU -- apparently, I am the first MS Math student to win this! 😱
Thanks for your support!!! 🤗
Much excitement in the Zelko household this week! 🥳
#academicsky #mathsky #medsky 🧪 🛟🩺
Introducing... BlueSky-Driven Development? ⚒️
Thanks to Julius Krumbiegel from @makie.org, we have early support for visualizations like these in #julialang! 🎨
Check out the issue to learn more: github.com/MakieOrg/Mak...
#dataviz #stats #openscience
Thanks to Julius Krumbiegel from @makie.org, we have early support for visualizations like these in #julialang! 🎨
Check out the issue to learn more: github.com/MakieOrg/Mak...
#dataviz #stats #openscience
March 18, 2025 at 5:24 PM
Introducing... BlueSky-Driven Development? ⚒️
Thanks to Julius Krumbiegel from @makie.org, we have early support for visualizations like these in #julialang! 🎨
Check out the issue to learn more: github.com/MakieOrg/Mak...
#dataviz #stats #openscience
Thanks to Julius Krumbiegel from @makie.org, we have early support for visualizations like these in #julialang! 🎨
Check out the issue to learn more: github.com/MakieOrg/Mak...
#dataviz #stats #openscience
@duckdb.org + httpserver + #julialang = quacking cool 🦆
Served 1 million synthetic patient DuckDB database on my Raspberry Pi, POSTed the Pi, did transformations of with DataFrames.jl, and presto! 🎇
Lightweight & high performance on a 4GB edge computing device! 🖥️
#opensource #datascience #maker
Served 1 million synthetic patient DuckDB database on my Raspberry Pi, POSTed the Pi, did transformations of with DataFrames.jl, and presto! 🎇
Lightweight & high performance on a 4GB edge computing device! 🖥️
#opensource #datascience #maker
March 17, 2025 at 5:34 PM
@duckdb.org + httpserver + #julialang = quacking cool 🦆
Served 1 million synthetic patient DuckDB database on my Raspberry Pi, POSTed the Pi, did transformations of with DataFrames.jl, and presto! 🎇
Lightweight & high performance on a 4GB edge computing device! 🖥️
#opensource #datascience #maker
Served 1 million synthetic patient DuckDB database on my Raspberry Pi, POSTed the Pi, did transformations of with DataFrames.jl, and presto! 🎇
Lightweight & high performance on a 4GB edge computing device! 🖥️
#opensource #datascience #maker
And that's all for today!
Enjoying Pittsburgh and the beautiful weather -- as well as my cozy hotel! Here's to day 2!
#medsky #IS25 #amia #academicsky 🧪 🛟🩺
Enjoying Pittsburgh and the beautiful weather -- as well as my cozy hotel! Here's to day 2!
#medsky #IS25 #amia #academicsky 🧪 🛟🩺
March 11, 2025 at 3:08 AM
And that's all for today!
Enjoying Pittsburgh and the beautiful weather -- as well as my cozy hotel! Here's to day 2!
#medsky #IS25 #amia #academicsky 🧪 🛟🩺
Enjoying Pittsburgh and the beautiful weather -- as well as my cozy hotel! Here's to day 2!
#medsky #IS25 #amia #academicsky 🧪 🛟🩺
First day of @amiainformatics.bsky.social Informatics Summit -- thoughts (T) & questions(Q) below! 💭
T: Great talk from Dr. Roni Rosenfeld about #epidemiology & #research w Delphi Group @carnegiemellon.bsky.social!
Q: At what level can modelers combine ("compose") their studies together? 📈 + 📊 = ❔
T: Great talk from Dr. Roni Rosenfeld about #epidemiology & #research w Delphi Group @carnegiemellon.bsky.social!
Q: At what level can modelers combine ("compose") their studies together? 📈 + 📊 = ❔
March 11, 2025 at 3:08 AM
First day of @amiainformatics.bsky.social Informatics Summit -- thoughts (T) & questions(Q) below! 💭
T: Great talk from Dr. Roni Rosenfeld about #epidemiology & #research w Delphi Group @carnegiemellon.bsky.social!
Q: At what level can modelers combine ("compose") their studies together? 📈 + 📊 = ❔
T: Great talk from Dr. Roni Rosenfeld about #epidemiology & #research w Delphi Group @carnegiemellon.bsky.social!
Q: At what level can modelers combine ("compose") their studies together? 📈 + 📊 = ❔
Is this the holy trinity of mathematical abstraction???
Got these for myself as I am leading a reading group on Topos and Sheaf Theory at Northeastern this semester.
Super excited to struggle and learn from the maths here!
Thanks for the recs @eminichiello.bsky.social & Matt Cuffaro!
#mathsky
Got these for myself as I am leading a reading group on Topos and Sheaf Theory at Northeastern this semester.
Super excited to struggle and learn from the maths here!
Thanks for the recs @eminichiello.bsky.social & Matt Cuffaro!
#mathsky
January 5, 2025 at 11:41 PM
Is this the holy trinity of mathematical abstraction???
Got these for myself as I am leading a reading group on Topos and Sheaf Theory at Northeastern this semester.
Super excited to struggle and learn from the maths here!
Thanks for the recs @eminichiello.bsky.social & Matt Cuffaro!
#mathsky
Got these for myself as I am leading a reading group on Topos and Sheaf Theory at Northeastern this semester.
Super excited to struggle and learn from the maths here!
Thanks for the recs @eminichiello.bsky.social & Matt Cuffaro!
#mathsky
Got shared this #visualization and #julialang blog post by
@johnbedwards.io:
johnbedwards.io/blog/big-dat...
Fantastic + exciting to see it being made using Julia +
@makie.org!
Ultimate question: can we get a #BillsMafia graphic? 👀 🦬
Keep up the awesome graphics! 🎨🖌️
@johnbedwards.io:
johnbedwards.io/blog/big-dat...
Fantastic + exciting to see it being made using Julia +
@makie.org!
Ultimate question: can we get a #BillsMafia graphic? 👀 🦬
Keep up the awesome graphics! 🎨🖌️
December 29, 2024 at 5:41 PM
Got shared this #visualization and #julialang blog post by
@johnbedwards.io:
johnbedwards.io/blog/big-dat...
Fantastic + exciting to see it being made using Julia +
@makie.org!
Ultimate question: can we get a #BillsMafia graphic? 👀 🦬
Keep up the awesome graphics! 🎨🖌️
@johnbedwards.io:
johnbedwards.io/blog/big-dat...
Fantastic + exciting to see it being made using Julia +
@makie.org!
Ultimate question: can we get a #BillsMafia graphic? 👀 🦬
Keep up the awesome graphics! 🎨🖌️
I like pictures quite a lot!
Since I know you were using #julialang, I'd be curious how you to use a packages (like juliagraphics.github.io/Luxor.jl/sta... or @makie.org) for sports visualizations -- especially hit spray or shot charts!
Happy to help you turn visualizations into packages too! 😁
Since I know you were using #julialang, I'd be curious how you to use a packages (like juliagraphics.github.io/Luxor.jl/sta... or @makie.org) for sports visualizations -- especially hit spray or shot charts!
Happy to help you turn visualizations into packages too! 😁
December 29, 2024 at 5:17 PM
I like pictures quite a lot!
Since I know you were using #julialang, I'd be curious how you to use a packages (like juliagraphics.github.io/Luxor.jl/sta... or @makie.org) for sports visualizations -- especially hit spray or shot charts!
Happy to help you turn visualizations into packages too! 😁
Since I know you were using #julialang, I'd be curious how you to use a packages (like juliagraphics.github.io/Luxor.jl/sta... or @makie.org) for sports visualizations -- especially hit spray or shot charts!
Happy to help you turn visualizations into packages too! 😁
📢 Makers, #raspberrypi enthusiasts, and programmers!
🧗♂️ I am on a quest to drive an e-ink display using a Raspberry Pi 4B and #julialang
One problem:
I don't know how to use SPI in Julia! 😰
Would anyone be willing to help me out with this? Details below 👇
#buildinpublic #tech #hacking
🧗♂️ I am on a quest to drive an e-ink display using a Raspberry Pi 4B and #julialang
One problem:
I don't know how to use SPI in Julia! 😰
Would anyone be willing to help me out with this? Details below 👇
#buildinpublic #tech #hacking
December 19, 2024 at 1:43 AM
📢 Makers, #raspberrypi enthusiasts, and programmers!
🧗♂️ I am on a quest to drive an e-ink display using a Raspberry Pi 4B and #julialang
One problem:
I don't know how to use SPI in Julia! 😰
Would anyone be willing to help me out with this? Details below 👇
#buildinpublic #tech #hacking
🧗♂️ I am on a quest to drive an e-ink display using a Raspberry Pi 4B and #julialang
One problem:
I don't know how to use SPI in Julia! 😰
Would anyone be willing to help me out with this? Details below 👇
#buildinpublic #tech #hacking
1/6
📝 4 papers accepted/published
🤓 3 graduate courses
🛠️ 2 MS thesis projects
📚 1 semester left
😴 0 gas in the tank
What a semester! I am so thankful to everyone who supported me through this semester! 🙏
Now to rest... And wait! 👀
Some reflections below 👇
#academicsky #phdsky #mathsky #medsky 🧪
📝 4 papers accepted/published
🤓 3 graduate courses
🛠️ 2 MS thesis projects
📚 1 semester left
😴 0 gas in the tank
What a semester! I am so thankful to everyone who supported me through this semester! 🙏
Now to rest... And wait! 👀
Some reflections below 👇
#academicsky #phdsky #mathsky #medsky 🧪
December 16, 2024 at 4:42 AM
1/6
📝 4 papers accepted/published
🤓 3 graduate courses
🛠️ 2 MS thesis projects
📚 1 semester left
😴 0 gas in the tank
What a semester! I am so thankful to everyone who supported me through this semester! 🙏
Now to rest... And wait! 👀
Some reflections below 👇
#academicsky #phdsky #mathsky #medsky 🧪
📝 4 papers accepted/published
🤓 3 graduate courses
🛠️ 2 MS thesis projects
📚 1 semester left
😴 0 gas in the tank
What a semester! I am so thankful to everyone who supported me through this semester! 🙏
Now to rest... And wait! 👀
Some reflections below 👇
#academicsky #phdsky #mathsky #medsky 🧪
That's quite exciting!
Have you been building Julia tools for census work?
In JuliaHealth, we've been exploring geospatial health informatics, determinants of health, and creating data-driven narratives.
In Poland last summer, I gave a presentation on some of the current Julia workflows for this.
Have you been building Julia tools for census work?
In JuliaHealth, we've been exploring geospatial health informatics, determinants of health, and creating data-driven narratives.
In Poland last summer, I gave a presentation on some of the current Julia workflows for this.
December 14, 2024 at 5:44 PM
That's quite exciting!
Have you been building Julia tools for census work?
In JuliaHealth, we've been exploring geospatial health informatics, determinants of health, and creating data-driven narratives.
In Poland last summer, I gave a presentation on some of the current Julia workflows for this.
Have you been building Julia tools for census work?
In JuliaHealth, we've been exploring geospatial health informatics, determinants of health, and creating data-driven narratives.
In Poland last summer, I gave a presentation on some of the current Julia workflows for this.
Well, how mathematicians might say it is if you gift one of them a box of Hagoromo chalk. Although, some may see this as a marriage proposal.
(I can neither confirm nor deny this happening)
(I can neither confirm nor deny this happening)
December 6, 2024 at 4:54 AM
Well, how mathematicians might say it is if you gift one of them a box of Hagoromo chalk. Although, some may see this as a marriage proposal.
(I can neither confirm nor deny this happening)
(I can neither confirm nor deny this happening)