I didn’t know ANT+ was “failed”, I use it all the time with my Garmin products. It’s cheap and it works better than Bluetooth.
I have ANT+ cadence and heart rate sensors. Lights, camera, Varia radar and power meter.
Some of that can be done with Bluetooth but realistically not all at the same time.
Anyone that’s run a smart trainer in a group with others will know that ANT+ is generally more reliable than Bluetooth too.
Apple refuse to support ANT+ so I need a dongle for my Mac and it’s the reason I don’t have an Apple Watch. No biggie.
https://en.wikipedia.org/wiki/ANT_(network)
I believe that's what the author was referring to when describing it as failed, but yes, this could've been worded better.
Contrast with BLE where you would have to make a connection to each device. The overhead of connecting and disconnecting, in addition to being power-prohibitive, takes too long. Some manufacturers have workarounds to enable use of their BLE products in a group fitness environment, but they are pretty much lacking.
It'll be interesting to see how the problem is solved if indeed ANT+ does go away.
I like the low-fi solution personally:
https://www.ipack.com/warmmark-temperature-indicator-short-r...
https://www.ipack.com/coldmark-temperature-indicator-10c-50f...
Can this be recreated as an audio clip for jumpscaring former govt employees?
Edit: On second thought this could be an OPSEC problem. Sorry but I don’t know if anyone can help you :(
A lot of what’s wrong in surprisingly few words
Definitely gonna check out some more of their posts later.
The key to the resistance of very long wavelengths of EM radiation (or equivalently, very slowly varying electric/magnetic fields) to attenuation when traveling through a metal is the nature of the way metals expel electric fields (they don’t generally block magnetic fields). When you apply a static electric field to a thin conductor, electrons will be pulled away from one side and toward the other such that the field inside is zero. However this migration of charges will actually result in the electric field on the far side of the metal being nearly the same as the field on the side closer to the source!
If the wavelength of some EM radiation is much longer than a metal obstacle is thick, the fact that the electric field is excluded from the interior of the metal won’t matter much. Even if the metal wasn’t there, the electric field strength wouldn’t vary much over that distance, and on the other side of the metal the induced charges will restore the roughly “correct” field. Since the magnetic component won’t vary much over that distance either, the fact that there’s no varying electric field inside the conductor to reinforce the magnetic field won’t significantly attenuate it.
If you’re familiar with Faraday cages, this will sound all wrong. Isn’t it long wavelengths they can block, and short wavelengths they can’t? This true when dealing with EM radiation in the “normal” radio bands and higher, but it turns out their ability to attenuate radiation falls off in the other direction too (once wavelengths get extremely long). When dealing with EM properties of materials, there are a huge number of different effects that apply in different circumstances, and it’s easy to forget one and confuse yourself.
https://en.wikipedia.org/wiki/Near-field_magnetic_induction_...
Many tanks and planes do have smart guns. Electronic firing control with additional software features that impede firing are beneficial and totally fine at that scale.
The military would love a smart gun to cut down on accidental discharges. Cops would love it to stop weapons being used against cops.
The issue is that it has to have a very high reliability (you don’t want it to fail to fire while a suspect is shooting at you). And not much point if it only works “sometimes” with unauthorized users.
Most of the world doesn’t need that whole setup because:
- Our cultural baseline around firearms is completely different. Countries like Denmark, Sweden, Finland, Switzerland, Austria, and the Czech Republic have plenty of guns at home - and historically, a lot of them were actual assault rifles, not “looks-spicy” semiautos.
- We treat guns like weapons. They live in safes, not nightstands, and kids get taught safety early, the same way you’d teach them not to put a fork in a power supply.
None of those countries are anywhere near US levels of gun ownership. See the table here: https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g...
USA has 120 guns pr 100 citizens. Of the countries on your list, Finland is next with 32. Denmark has 10.
> and historically, a lot of them were actual assault rifles
Fully automatic weapons are not legal for civilians in Denmark at least.
Many semiautos are also banned. Semiauto shotguns must be restricted to hold only two shells and you need a special license even for that.
I don’t disagree with your general point, but you’re not making a good comparison IMO.
1. Temper resistance is not temper impossibility 2. If a tag allows tracking, bad actors might track good actors?
> RuBee is an acronym for "Radio U.S. Bureau of Engraving and Printing",
Weirdly not related at all to Zigbee's naming origins, in spite of their technological similarity.
> The Institute of Electrical & Electronics Engineers Inc., the international governing group for such technology, has designated P1901.1 as the technical designation given to the RuBee technology, which was named RuBee by Visible Assets. "There is no real reason we named it RuBee," said Mr. Stevens. "It actually was named after the song 'Ruby Tuesday.' It just sounded good."
https://theproducenews.com/print/pdf/node/1355 (PDF)
I'd assume "ZigBee" was also an inspiration.
