30.01.2026 22:14
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Purple line train tracks
Purple line looking good in College Park! Catenary lines up and everything #purplelinemd
Thank you @jackiebensen4.bsky.social @nbcwashington.com for this outstanding, and heartbreaking, story about deadly road design in Montgomery County MD.
www.nbcwashington.com/news/local/m...
40 or more is 65+ down a neighborhood street. That should be a felony, not half the price of an iPhone.
Orlando’s Marta is better 🤷
Oh hi marc
Happy #biketoworkday! Next stop, College Park!
Thanks for your interest!
I do see this as a new extension to nonlinear dynamics work. Of course synchronization and chaos have been around for decades but to construct a robust phase of matter is new and requires new techniques, specifically w.r.t. breaking discrete time translation symmetry. However the foundation is old.
I think I trust the guy with 10 Grammy nominations and 5 number 1 Billboard hits on questions of rhythm. Nice to know La Flame is an OEIS user
Traffic signal which says “Train Coming”
A subtle sign that #purplelinemd is coming soon!
Me in front of the APS sign
At #APSGlobalSummit2025!
Steel girders on March 10-13 apparently!
New roof structure on a flatbed truck
New beams crossing from metro platform to new mezzanine.
New roof pieces and beams in #SilverSpring! #purplelinemd #wmata
Metal frames placed on mezzanine, resembling elevator shafts
I think you’re right!
If you thought the Integer Quantum Hall Effect was fully understood, think again! We show how temperature and disorder destroy IQHE without affecting the topologically-protected plateau height
arxiv.org/abs/2501.08273
My #metrorewind! Red line summer shutdown skewed my results a tad
New catenary poles at UMD! It’s getting real! #purplelinemd
Published my first Physical Review Letter today on the first construction of a robust time crystal in a classical, dissipative system! ⏰💎 #timecrystals
Rails over Northwest branch
Rails over sligo creek
Exciting to see rails over Sligo Creek and Northwest Branch! #purplelindmd
And it will be even better with Purple Line, CCT, MBT, new Metro Entrance and Fenton St bike lanes! Waiting is hard
#sufjan is number one for another year!
North tower of the Silver Spring mezzanine is poured and ready! #purplelinemd
On a related note, I’ve begun to say “coolness” instead of inverse temperature 😎
This means if all the data in the world (≈175 ZB) instead stored the atomic information of a piece of ice, the internal energy would be less than the energy of a lettuce leaf.
Since temperature is a measure of energy per information, we can say that water freezes at approximately 5 dietary calories per yottabyte.
New #purplelinemd rails on Campus Dr at University
