We knew the forebrain and hindbrain were different. This research shows that the difference is OLD, and likely from when the brain was more distributed. They also found that, while they function in almost the same way, they are built from different genetic tool kits.
Basically, we knew there was a difference. This explains what the difference is and how to work around the problems it has created.
Randomly this appeared in my feed.
https://youtube.com/shorts/Qpyd7TsH14Y
Doesn’t say anything about the receiver side, but shows the mechanism quite well.
Speculating, but I would guess they applied a band pass filter to it. You can then either take a simple threshold value, or look for a rapid change and trigger off that. 4 buttons means 4 sets of filters, each tuned to a different frequency.
That said, the analogue electronics engineers of yesteryear were insanely competent and making analogue circuits do interesting things to save money or space.
I believe it was old school analogue electronics, but I’m speculating there.
I just looked it up, it was ultrasonic signals. The main one was the Zenith Space Command.
Not fully related, but early TV remotes used sound rather than IR. The buttons made a distinctive “click” noise, from a mechanical mechanism. The different clicks were detected in the TV and used as input.
Plus side, no batteries to deal with.
Down side, about as (un)reliable as you would expect.
I’ve seen it happen in the UK. Large protests and UK news barely touches it. Even Facebook etc seems to push it down the rankings.
Because of this, the next protest is less effective, and so gets even less coverage on the international stage.
The revolution will not be televised.
The right wing, the world over, has realised that they don’t need to suppress protests. They just need to suppress the news coverage that lets them grow.
I’m not American, but I suspect there have been far more attempts at counter action that just didn’t get traction. You just never heard about them due to media capture.
You also need a trifacta to really gain ground. A ‘body’ of popular support (marches etc). A political ‘brain’ to focus and guide it. Finally, you need the option of teeth, to make the other side pay proper attention to you. The Irish troubles are an excellent example of this at play. 95% of it was peaceful marches etc. The last 5% was the IRA and political parties.
Right now, your political party has been captured by the rich, and a media blackout is stopping the body growing to the size that can actually support the teeth.
The element can cool the air below zero. They have to play games if it gets to the due point of the outside air to keep from frosting up however.
Also, there is an efficiency hit, as the temperature differential gets larger. This is why ground sourced, or even water sourced are more efficient in colder climates.