anyone can explain why this is such a big breakthrough?
vibration powered electricity generator is not new, neither is CO2 monitoring. so what's the big deal?
dfex 7 hours ago [-]
More concerning - can anyone explain why there is such a variation in the results from the DC powered unit vs. the TENG-powered one? The graph at the bottom of the report shows a difference of 30-50ppm between both units when they are sitting side by side on the bench.
callmemclovin 11 minutes ago [-]
That's in the normal range of accuracy of modern CO2 sensors, for example SCD40 from Sensirion is described with an accuracy of ±50.0 ppm ±5.0 %m.v.
zipping1549 5 hours ago [-]
I skimmed the original article and it only mentions the graph and says that it's "comparable to DC powered unit". I'm guessing < 100ppm difference is somewhat acceptable?
dfex 2 hours ago [-]
You might be right - it's just odd that it's always showing "more" rather than similar amounts.
Also, according to Claude[1] a 50ppm difference is equivalent to around 25 years current atmospheric carbon increase.
[1] "What is the normal range for background CO2 concentrations in the air?"
strogonoff 1 hours ago [-]
It’s crazy to think that many people alive today experienced a 30% increase in ambient atmospheric carbon dioxide concentration within their lifetimes.
4 hours ago [-]
noisy_boy 8 hours ago [-]
Tangential/Spoiler: I came to know about Kaist (Korea Advanced Institute of Science & Technology) in the Netflix series Devil's Plan (season 2) which had two of its students as the top three contestants.
vibration powered electricity generator is not new, neither is CO2 monitoring. so what's the big deal?
Also, according to Claude[1] a 50ppm difference is equivalent to around 25 years current atmospheric carbon increase.
* Pre-industrial (1700s): ~280 ppm
* 1958 (when systematic measurements began): ~315 ppm
* 2000: ~370 ppm
* 2015: ~400 ppm (milestone crossed)
* Current: ~420-425 ppm
[1] "What is the normal range for background CO2 concentrations in the air?"