Paul Callahan (he/him)
@paulcallahanmv.bsky.social
Computer scientist with a bunch of weird hobbies. I have mostly been linking news and making political comments. I plan to post more 3D print models and other math crafts when I can.
"When the world falls apart, some things stay in place."
"When the world falls apart, some things stay in place."
Pinned
Paul Callahan | Printables.com
I've had an interest in puzzles and tilings for many years and use 3D printing to try out ideas. – 3D models
www.printables.com
Sadly, I mostly post news and politics these days. I post a little AI art now and then as well.
But see my printables link for what really gets me going: tesselations and puzzles.
But see my printables link for what really gets me going: tesselations and puzzles.
The thing is, nothing really surprises me about Trump's connection to Epstein. The latest revelations fit accusations that were floating around before the 2016 election. There is also the Access Hollywood tape and the E. Jean Carroll verdict.
I assumed this was all "priced in."
I assumed this was all "priced in."
November 14, 2025 at 12:01 AM
The thing is, nothing really surprises me about Trump's connection to Epstein. The latest revelations fit accusations that were floating around before the 2016 election. There is also the Access Hollywood tape and the E. Jean Carroll verdict.
I assumed this was all "priced in."
I assumed this was all "priced in."
Good to see this. (Gift article)
Catholic Bishops Rebuke U.S. ‘Mass Deportation’ of Immigrants
www.nytimes.com
November 13, 2025 at 12:45 AM
Good to see this. (Gift article)
November 11, 2025 at 8:23 PM
Some unusually good reporting from NYT.
November 11, 2025 at 5:42 PM
Some unusually good reporting from NYT.
November 11, 2025 at 1:02 AM
November 10, 2025 at 7:31 PM
I thought it was when the cleaning lady shows up to erase it. Or is that just a Far Side comic?
Scientists See ‘Eureka’ Moments in Mathematicians’ Chalkboard Writings
Researchers spot the “tipping point” before mathematicians’ moments of discovery
share.google
November 10, 2025 at 7:28 PM
I thought it was when the cleaning lady shows up to erase it. Or is that just a Far Side comic?
A periodic reminder of a basic principle that applies to a lot more than the Cold War.
A quote by John Fitzgerald Kennedy
We cannot negotiate with people who say what's mine is mine and what's yours is negotiable.[ The Berlin Crisis: Radio and Television Address to the ...
www.goodreads.com
November 9, 2025 at 10:05 PM
A periodic reminder of a basic principle that applies to a lot more than the Cold War.
I noticed the colors were really washed out. Here is the simulated stone tiling with a lot of modification in GIMP.
November 9, 2025 at 4:50 AM
I noticed the colors were really washed out. Here is the simulated stone tiling with a lot of modification in GIMP.
I took my polymer clay photo, desaturated it completely and then imposed a perfect tiling as well as I could in Inkscape, using partially opaque polygons with natural tones from a photo to color the clay. Since my clay is imperfect, it doesn't quite match. #inkscape #penrosetiles
November 9, 2025 at 1:56 AM
I took my polymer clay photo, desaturated it completely and then imposed a perfect tiling as well as I could in Inkscape, using partially opaque polygons with natural tones from a photo to color the clay. Since my clay is imperfect, it doesn't quite match. #inkscape #penrosetiles
Reposted by Paul Callahan (he/him)
Newsom: They want to bring us back to a pre-1960s, maybe 1860s world. And you’re seeing it not just on voting rights—you’re seeing it on civil rights, on women’s rights, on LGBTQ rights. They’re censoring historic facts. They’re on a banning binge—Bud Light and Big Bird
November 8, 2025 at 8:51 PM
Newsom: They want to bring us back to a pre-1960s, maybe 1860s world. And you’re seeing it not just on voting rights—you’re seeing it on civil rights, on women’s rights, on LGBTQ rights. They’re censoring historic facts. They’re on a banning binge—Bud Light and Big Bird
Blue polymer clay desaturated in GIMP to look more like natural stone. I may use this approach to simulate the entire mosaic with varying mineral colorations.
November 8, 2025 at 8:00 PM
Blue polymer clay desaturated in GIMP to look more like natural stone. I may use this approach to simulate the entire mosaic with varying mineral colorations.
Printables link for this polymer clay project. You need both a printer and clay to do it. It might work with something cheaper like salt clay. I haven't tried.
#3d-printing #polymerclay #penrosetiles #crafts
#3d-printing #polymerclay #penrosetiles #crafts
Polymer clay cutters for Penrose Voronoi diagram tiles. by Paul Callahan | Download free STL model | Printables.com
www.printables.com
November 8, 2025 at 5:33 PM
Printables link for this polymer clay project. You need both a printer and clay to do it. It might work with something cheaper like salt clay. I haven't tried.
#3d-printing #polymerclay #penrosetiles #crafts
#3d-printing #polymerclay #penrosetiles #crafts
Polymer-clay tiling made using 3D-printed cutters. I will post a link to the model after I put it up, but the main idea here is to include a plunger in each cutter for removing the shape without leaving an imprint. The pattern tiles are optional but can be used for layout.
#3d-printing #polymerclay
#3d-printing #polymerclay
November 8, 2025 at 5:02 PM
Polymer-clay tiling made using 3D-printed cutters. I will post a link to the model after I put it up, but the main idea here is to include a plunger in each cutter for removing the shape without leaving an imprint. The pattern tiles are optional but can be used for layout.
#3d-printing #polymerclay
#3d-printing #polymerclay
Some crafts and 3D print (bottom) based on the Voronoi diagram of a Penrose tiling.
November 8, 2025 at 4:11 PM
Some crafts and 3D print (bottom) based on the Voronoi diagram of a Penrose tiling.
Reposted by Paul Callahan (he/him)
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BREAKING: A federal jury in Brooklyn awarded our clients — 674 immigrants unlawfully jailed by the Suffolk County Sheriff’s Office — $112 million. Could not be more proud to work at @latinojustice.bsky.social and to partner with the talent of Winston & Strawn.
Jury Awards $112 Million to 674 Immigrants Unlawfully Held by Suffolk County for ICE Handover | LatinoJusticePRLDEF
FOR IMMEDIATE
www.latinojustice.org
November 8, 2025 at 6:22 AM
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Cool! I found this page by accident. The US was working on concentrating solar power a while back, but I'm not sure what happened. I thought solar panels just got too cheap for it to make sense.
China is leading the way on alternative energy why rightwing American assholes are "drill baby drill."
China is leading the way on alternative energy why rightwing American assholes are "drill baby drill."
China's dual-tower solar-thermal plant launched in Gobi Desert
China has switched on its first dual-tower solar-thermal power station, using concentrated heat to generate power even after sunset.
interestingengineering.com
November 8, 2025 at 1:25 AM
Cool! I found this page by accident. The US was working on concentrating solar power a while back, but I'm not sure what happened. I thought solar panels just got too cheap for it to make sense.
China is leading the way on alternative energy why rightwing American assholes are "drill baby drill."
China is leading the way on alternative energy why rightwing American assholes are "drill baby drill."
"Trump doesn’t look so indomitable in Dec. 2024 if you account for all the variables that set him up for victory (and it was a small victory at that).
It is clear now that claims of a fundamental realignment of American politics have been highly exaggerated."
It is clear now that claims of a fundamental realignment of American politics have been highly exaggerated."
The 2024 Trump "realignment" is over already
Claims of a conservative realignment of non-whites, the working class, and young voters have been highly exaggerated
www.gelliottmorris.com
November 7, 2025 at 2:50 PM
"Trump doesn’t look so indomitable in Dec. 2024 if you account for all the variables that set him up for victory (and it was a small victory at that).
It is clear now that claims of a fundamental realignment of American politics have been highly exaggerated."
It is clear now that claims of a fundamental realignment of American politics have been highly exaggerated."
Darn. "Co-Redemptrix" was going to be the name of my Catholic Metal band.
Jesus, not Virgin Mary, saved the world, Vatican says
Jesus may have heard words of wisdom from his mother Mary, but she did not help him save the world from damnation, the Vatican said on Tuesday.
www.reuters.com
November 5, 2025 at 5:52 PM
Darn. "Co-Redemptrix" was going to be the name of my Catholic Metal band.
Reposted by Paul Callahan (he/him)
President Trump and several others now high up in his second administration have been talking about using the National Guard to help with mass deportations — and possibly invoking the Insurrection Act — for years. Now, those plans might be playing out.
Trump's National Guard deployments aren't random. They were planned years ago
President Trump and several others now high up in his second administration have been talking about using the National Guard to help with mass deportations — and possibly invoking the Insurrection Act — for years. Now, those plans might be playing out.
n.pr
November 4, 2025 at 2:35 AM
President Trump and several others now high up in his second administration have been talking about using the National Guard to help with mass deportations — and possibly invoking the Insurrection Act — for years. Now, those plans might be playing out.
November 3, 2025 at 7:21 PM
November 3, 2025 at 5:52 PM
"We are or were an important export market for China, but China has a near-monopoly on rare earths, which are crucial for much advanced technology. And China’s limits on rare-earth exports to the United States were a much bigger problem for us than Trump’s tariffs were for them."
We’re Number Two!
How Trump ceded the future to China
paulkrugman.substack.com
November 3, 2025 at 2:51 PM
"We are or were an important export market for China, but China has a near-monopoly on rare earths, which are crucial for much advanced technology. And China’s limits on rare-earth exports to the United States were a much bigger problem for us than Trump’s tariffs were for them."