1,961 karma · joined March 27, 2015
Am open for good chat on topics that matter in life and elsewhere.
Heat exchanger there is usually an extruded ceramic grid (ERV) or rolled corrugated aluminum (functions closer to HRV than ERV)
Found a video where the boot-up speed/usage are shown: https://www.youtube.com/watch?v=d40KwKvCGZo
Also quite similar is actively driving the shield used in many high impedance sensor circuits (most notably capacitive touch sensing) to reduce the parasitic capacitance you would get when ground is used for the E-field shield:
Not sure what they mean by “high value” here.
Identification of officer from Sir John franklin's Northwest Passage expedition https://news.ycombinator.com/item?id=41723315
Franklin expedition captain who died in 1848 was cannibalized by survivors https://news.ycombinator.com/item?id=41706216
Disclaimer: am professionally a PCB designer/EE for last 22 years.
As far as the etymology goes, back in the days a drone was a male bee, so by default airborne. You can trace that meaning back two thousand years or so. It was first used to mean remote controlled aircraft in 1946.
Of course, languages evolve and now it can mean any untethered robot; air, land or sea.