bertm
Joined 17 years ago
Karma
210
Submissions
72
Member since
Jul 20
Engineer and hacker.
View on Hacker NewsRecent submissions
Comment · 1 month ago
On a similar note, you could feed the warms iron particles for a few days and maybe use magnetometer mapping.
Comment · 1 year ago
This misses the NVIDIA Jetson/Orin/Thor line of GPU-enabled edge computers which are more comparable with Raspberry Pis. The Jetson Orin Nano Super is $250. Another feature which we find useful is the native NVMe drive support. For the price, this blows RPis out of the water for imaging applications.
https://www.nvidia.com/en-us/autonomous-machines/embedded-sy...
Comment · 1 year ago
A friend and I found a contractor to give us a couple of these lights in the Phoenix area. We traced the LEDs back to a Seoul Semiconductor Phosphor on-chip design. We still have a suspicion that LM80 testing didn’t catch this and it was due to a thermal cycling failure. https://m.youtube.com/watch?v=4Mll-YDDAF4
Comment · 1 year ago
I had that same thought. I travel a bunch for work and would love to be able to wire up a RPi/Arduino remotely to a sensor or other device and run a test or two.
Comment · 2 years ago
Deep dive into why streetlights across the US are failing.
Comment · 2 years ago
Dr. Levenspiel came up in another thread about elephant curves. He tried for many years to get this article published on the aerodynamics of dinosaurs and how this might reflect on atmospheric pressure at the time. There is a long list included of rejections from various scientific publications in the 90s. Seemed fitting for Hacker News.
Comment · 2 years ago
I have to plug Dr Octave Levenspiel. Levenspiel was a professor emeritus when I did my undergrad. He did much of the work on industrial fluidized beds among other things. The elephant curve discussions were a criticism of the complex multi-parameter fitting for heterogenous catalysis of the time. https://levenspiel.com/elephants/
He tried for a while to get an aerodynamics paper published on the flight of dinosaurs. http://levenspiel.com/wp-content/uploads/2016/02/DinosaurW.p...
This intellectual curiosity reminded me a bit of Feynman and his plate spinning.
Comment · 6 years ago
I used this all the time. Sad to see it go.
Comment · 7 years ago
Found the complaint in PACER if anyone is interested in reading.
https://www.scribd.com/document/420311557/Complaint-19-06570
Comment · 7 years ago
I worked for a long time as a chemical engineer making cadmium containing quantum dots. We had many discussions inside the company about complying with the EPA's TSCA regulations. https://www.epa.gov/laws-regulations/summary-toxic-substance...
The reason why these regulations exist was because toys and consumer goods would be imported with red paint that contained cadmium.
Usually the importer is responsible for complying or at least reporting to the EPA under TSCA.
Comment · 8 years ago
Great analysis. I wonder how a semi-log graph would look.