Arjun Raj
@arjunraj.bsky.social
Just another LLM. Tweets do not necessarily reflect the views of people in my lab or even my own views last week. http://rajlab.seas.upenn.edu https://rajlaboratory.blogspot.com
Super proud of Dr. @giannatbusch.bsky.social for successfully defending her thesis! Such a talented and wonderful human!
October 26, 2025 at 6:33 PM
Super proud of Dr. @giannatbusch.bsky.social for successfully defending her thesis! Such a talented and wonderful human!
My great pleasure to introduce DR. Aoife O’Farrell!! An incredible scientist and human being. @aofarrell.bsky.social not only produced an amazing thesis by her own sheer brilliance and will, but also provided tireless service to Penn Bioengineering. Will be sorely missed!
September 4, 2025 at 11:49 PM
My great pleasure to introduce DR. Aoife O’Farrell!! An incredible scientist and human being. @aofarrell.bsky.social not only produced an amazing thesis by her own sheer brilliance and will, but also provided tireless service to Penn Bioengineering. Will be sorely missed!
The cool thing? This method discovered distinct cell populations in specific locations WITHOUT us telling it where to look. It reconstructs spatial organization without spatial information!
July 15, 2025 at 3:43 PM
The cool thing? This method discovered distinct cell populations in specific locations WITHOUT us telling it where to look. It reconstructs spatial organization without spatial information!
We developed a new computational tool called the "L-metric" that finds cells with mutually exclusive gene expression. Think of it as spotting cells that are in an "either/or" state - they're committing to one fate while shutting down another.
July 15, 2025 at 3:43 PM
We developed a new computational tool called the "L-metric" that finds cells with mutually exclusive gene expression. Think of it as spotting cells that are in an "either/or" state - they're committing to one fate while shutting down another.
We tracked cells called NMPs as they differentiate and move through the gastruloid. Just like in real embryos, this happens as a smooth, continuous wave - cells don't just suddenly "decide" to become something new, they gradually transition while talking to their neighbors.
July 15, 2025 at 3:43 PM
We tracked cells called NMPs as they differentiate and move through the gastruloid. Just like in real embryos, this happens as a smooth, continuous wave - cells don't just suddenly "decide" to become something new, they gradually transition while talking to their neighbors.
We profiled dozens of gastruloids and found something remarkable: despite looking different on the outside, they're actually incredibly consistent on the inside. Cell types organize in predictable patterns, gastruloid after gastruloid. It's like they have a hidden blueprint!
July 15, 2025 at 3:43 PM
We profiled dozens of gastruloids and found something remarkable: despite looking different on the outside, they're actually incredibly consistent on the inside. Cell types organize in predictable patterns, gastruloid after gastruloid. It's like they have a hidden blueprint!
Wow, just implemented the new Cellpose-SAM from @computingnature.bsky.social in NimbusImage and it's *awesome*! Give it a try!
nimbusimage.com
nimbusimage.com
May 7, 2025 at 6:19 PM
Wow, just implemented the new Cellpose-SAM from @computingnature.bsky.social in NimbusImage and it's *awesome*! Give it a try!
nimbusimage.com
nimbusimage.com
Fun little convenience feature: Snapshots, which are like bookmarks for your data. Never struggle again to find where that image came from in your dataset. Also: easy export of movies to GIF!
March 24, 2025 at 2:57 PM
Fun little convenience feature: Snapshots, which are like bookmarks for your data. Never struggle again to find where that image came from in your dataset. Also: easy export of movies to GIF!
Blog post: Documenting computational analyses by provenance vs. function
rajlaboratory.blogspot.com/2025/01/docu...
rajlaboratory.blogspot.com/2025/01/docu...
January 7, 2025 at 2:27 PM
Blog post: Documenting computational analyses by provenance vs. function
rajlaboratory.blogspot.com/2025/01/docu...
rajlaboratory.blogspot.com/2025/01/docu...
Behold, my ornate UORBIT plot!
Seriously, though, while I agree that UMAPs are not well-founded, they are successful in conveying a certain scientific aesthetic (in this case, the glory of big data). They are perhaps the epicycles of our time?
Seriously, though, while I agree that UMAPs are not well-founded, they are successful in conveying a certain scientific aesthetic (in this case, the glory of big data). They are perhaps the epicycles of our time?
December 24, 2024 at 9:52 PM
Behold, my ornate UORBIT plot!
Seriously, though, while I agree that UMAPs are not well-founded, they are successful in conveying a certain scientific aesthetic (in this case, the glory of big data). They are perhaps the epicycles of our time?
Seriously, though, while I agree that UMAPs are not well-founded, they are successful in conveying a certain scientific aesthetic (in this case, the glory of big data). They are perhaps the epicycles of our time?
Reposting our Penn Postdoctoral Fellowship in Genetics!
www.med.upenn.edu/apps/my/bpp_...
www.med.upenn.edu/apps/my/bpp_...
December 12, 2023 at 4:20 PM
Reposting our Penn Postdoctoral Fellowship in Genetics!
www.med.upenn.edu/apps/my/bpp_...
www.med.upenn.edu/apps/my/bpp_...