Viewing profile — xavieralexandre

> They require a shielded room to increase the SNR. Not anymore. That is exactly the purpose of Darpa Ambient program: https://www.darpa.mil/research/programs/atomic-magnetometer-.…

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…

You are linking to the magnetic anomaly grid, which is primarily intended for geophysical research and modeling local variations. For a basic compass app, you can rely on the World…

Some types of glue absorb a lot of the laser energy. There are dedicated plywood optimized for laser cutting https://n-e-r-v-o-u-s.com/blog/?p=6042

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…

Most plywood is glued with phenolic glues whereas melamine glues will behave better with a laser: https://n-e-r-v-o-u-s.com/blog/?p=6042

He also did a nice post about a machine he built to test Blackberry pagers' radio reception: https://woodgears.ca/misc/rotating_machine.html

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 produci…

It looks like someone took the "Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway" sneakernet idea literally.

I love reading those articles about new materials. Since reading James Edward Gordon's The New Science of Strong Materials: Or Why You Don't Fall through the Floor ( https://press.…

Also the planet could well become greener with global warming but the issue is the rate of change. Even if the new growing conditions were great for some crops, evolving our entire…

Steam bending was and is still used for mass-produced furniture: https://en.wikipedia.org/wiki/No._14_chair And there are also very interesting modern takes on bending wood such as…

I do it in practice! With light hills I climb at 25kph (Steeper hills, I can’t hit the limit), and go down at 30-35. Faster than the same length flat road along the lake.

I’m currently renovating a house and we live with a single wood (pellet) stove for the whole building. Living in a 16C home is surprisingly fine but the worst part is indeed the co…

This reminds me of one of my favorite physics lessons in undergrad: classical mechanics are a limiting case of general relativity where v << c so that all terms with v/c can be neg…

Dig a few meters and your soil will be 13C, a great starting point for your heat pump.

Wouldn’t you be able to have a heat floor heated by your wood? If wood is cheap where you live heating water with it is a nice upgrade from a basic wood stove.

The fact that each link is accompanied by a quick summary is a nice touch. I wish more newsletters and link lists would do this. http://www.pointer.io/archives/

Technically there is a mass of cold air that comes out of the fridge when you open the door. Keeping the door shot keeps this mass of air inside.

I expect bike and component prices to go down with wider adoption. Especially e-bikes. I was for example surprised to see that on my kids-towing e-bike in a hilly city I have to ch…

I'm wondering if a workable idea would be instead of having pedestrian paths and bike lanes and wondering where new kind of vehicles should go to have different tiers of lane with …