roger w (@sf21roger) 's Twitter Profile
roger w

@sf21roger

social entrepreneur

ID: 2371453531

calendar_today04-03-2014 05:44:18

576 Tweet

221 Followers

3,3K Following

Devabhaktuni "Sri" Srikrishna (@sri_srikrishna) 's Twitter Profile Photo

Why cleaning air in your classroom/home/bar/work at least 6 to 12 times per hour (6-12 ACH) is not great, but rather the bare minimum to cut down COVID spreading. + 5 steps to get 6-12 ACH with gold-standard HEPA purifiers or cheaply with Do-It-Yourself (DIY) filtration (1/19)

Why cleaning air in your classroom/home/bar/work at least 6 to 12 times per hour (6-12 ACH) is not great, but rather the bare minimum to cut down COVID spreading.

+ 5 steps to get 6-12 ACH with gold-standard HEPA purifiers or cheaply with Do-It-Yourself (DIY) filtration

(1/19)
Wolf of X (@tradingmaxisl) 's Twitter Profile Photo

A Thread on Amazing and Surreal Sculptures and Statues Buckle up, because things are about to get unreal..! 1. "The Proud Youth" statue by artist Chen Wenling

A Thread on Amazing and Surreal Sculptures and Statues

Buckle up, because things are about to get unreal..!

1. "The Proud Youth" statue by artist Chen Wenling
Richard Corsi, PhD, PE (Texas) (@corsiaq) 's Twitter Profile Photo

Training modules for Indoor Air Quality! ucdavis.edu/news/video-ser… The videos and training modules are freely available at link in story. The project was funded under Gov Gavin Newsom’s SMARTER plan for California’s COVID-19 response. UC Davis College of Engineering California Department of Public Health

Mike Hoerger, PhD MSCR MBA (@michael_hoerger) 's Twitter Profile Photo

PMC COVlD Dashboard, Jun 23, 2025 (U.S.) Find the full dashboard at pmc19.com/data Use/improve and share any images. Let me know how it goes using the links to international or more localized U.S. data. It's very helpful, but there's a learning curve. 🧵6/6

PMC COVlD Dashboard, Jun 23, 2025 (U.S.)

Find the full dashboard at pmc19.com/data

Use/improve and share any images. Let me know how it goes using the links to international or more localized U.S. data. It's very helpful, but there's a learning curve.

🧵6/6
roger w (@sf21roger) 's Twitter Profile Photo

Clawing back public media funding would rip vital services out of our communities – early education, local journalism, emergency alerts, and local connection. Urge your Senators to vote NO Protect My Public Media: bit.ly/3YMxiXB #ProtectMyPublicMedia

Andrew McCarthy (@ajamesmccarthy) 's Twitter Profile Photo

Pleased to share my 2025 recap! I'm so proud of everything that went down this year, it was the most chaotic year of my life but by far the most rewarding. Thank you for all your support in 2025, none of this would have been possible without you. What was your favorite shot?