pfyy

The hackster article has a bit more technical infos: https://www.hackster.io/news/exploring-the-invisible-world-w...

nteresting reading. I think the article kind of misses the point. The problem was the queuing of requests where nobody was waiting for the response anymore. The same problem would manifest on a monolith with this queuing. If the time to generate the response plus the maximum queue time were shorter than the timeout on the client side, the request amplification would not have happened. The first thing I do on HTTP-based backends is to massively decrease the queue size. This fixes most of these problems. An even better solution would be to be able to purge old requests from the queue, but most frameworks do not allow that, probably due to the Unix socket interface.

We made a small co2 sensor based on the sensirion scd30 and m5 stack. If you want a portable sensor with battery and display, you might be interested. Source code is on https://github.com/smoca-ag/m5stack_co2_sensor

I have a question. Does anybody know why we keep our indoor light sources uva / uvb free ? I know that too much UVA/B light seems to be carciogenic, but a small amount of it, especially UVB seems to be beneficial to human and still kills germs, especially covid [1]

The positive effects are a) vitamin d production b) germicide

The negative effects are c) lower energy efficiency in the visible spectrum (watt per visible light produced) d) negative effect on the eye e) carciogenic

For indoor keeping of reptiles UVB light seems to be needed [2] As far as i've read, for indoor planting, UV light seems to beneficial as well, for example it increases the production of THC [3]

Why should we, as humans, be different ?

[1]Ratnesar-shumate, S.; Williams, G.; Green, B.; Krause, M.; Holland, B.; Wood, S.; Bohannon, J.; Boydston, J.; Freeburger, D.; Hooper, I.; Beck, K.; Yeager, J.; Altamura, L. A.; Biryukov, J.; Yolitz, J.; Schuit, M.; Wahl, V.; Hevey, M.; Dabisch, P. Simulated Sunlight Rapidly Inactivates SARS-CoV-2 on Surfaces. J. Infect. Dis. 2020, 222 (2), 214–222.Google Scholar https://sci-hub.st/https://doi.org/10.1093/infdis/jiaa274

[2] https://en.wikipedia.org/wiki/Ultraviolet#UVB

[3] https://vanessa-nielsen.com/cannabis-plants-uv-light/

Great, this would have helped us a lot in the implementation of a remote control app we did with webrtc. In my opinion, the best available resource at the moment is https://hpbn.co/webrtc/. (Also about a lot of other protocols)