Thanks. I was mostly basing my answer on my experience with nautical charts, where declination corrections are typically uniform over relatively large areas and local anomalies are less of a concern. I hadn’t considered how much more variable the field can be in terrestrial use.
From that, you can pre-compute a low-resolution declination grid. NOAA even provides one here:
https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml#i.... That’s only a few KB of data and requires just a simple declination subtraction based on lat/lon, similar to how it’s handled on nautical charts. This works fine as long as you stay away from the poles (and Alaska).
The article rightly points out the industrial impact of more powerful and compact lasers but I cannot wait for those PCSELs to reach the small workshop market. Having a cheap laser able to cut metal at home / small shops would be so useful (And sneakily dangerous as lasers are).
You are not forbidden at the Federal level to have fixed units.
But many states do indeed requires a permit to install fixed units. And have strict regulations such as self producing half of the electricity required by the installation.
One of the side effect of such regulation is that many business and houses will use cheap non-fixed units with open door and windows instead of installing proper reversible heat pumps.
It looks like someone took the "Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway" sneakernet idea literally.
Quality of air in established modern cities has been vastly improving in the last decades [1] and is subjected to much scrutiny nowadays. I doubt many cities ever had a comparable effect to smoking 10 cigarettes a day.
For a clean chain you can switch from a conventional lube to wax based lube. It’s a relatively involved process (You need to degrease your chain before application) but it keeps the chain relatively dry and clean. (Plus it’s slightly better performing than other lubes).
There's one advantage to this way of scrolling most comments seem to miss:
When you go to the next page by hitting Space or Page Down there's an interruption in the flow and you have to refocus at the top of the page once you're finished with the current page.
Here I like the fact than I can already start focusing at the top of the page while finishing to read the page at the bottom.
Weird, yes, but it has at least this advantage over classic pagination display.
Not anymore. That is exactly the purpose of Darpa Ambient program: https://www.darpa.mil/research/programs/atomic-magnetometer-...
Demo from 2022: https://www.youtube.com/watch?v=VTnIXWCBYTw