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Comment Re: Big bada boom (Score 1) 71

Well, a baseball bat *is* a deadly weapon, if used as a weapon.

OTOH, when arguing about whether it's a bomb the definitions of the terms are less clear. And when arguing about whether it's an explosion, high energy chemists/engineers will have a different definition than folks who don't deal with the details.

To me, it's an explosion. If some professional wants to say "No, it's a deflagration." I'm not going to say he's wrong, but I'm not wrong either. We're just speaking different dialects of English.

Submission + - Researchers identify people through ordinary Wi-Fi with 99 percent-accuracy (tomshardware.com)

Baron_Yam writes: Security researchers at the Karlsruhe Institute of Technology (KIT) in Germany have published a paper demonstrating that unencrypted beamforming data broadcast by Wi-Fi devices during normal operation can be used to identify individuals walking through a room with 99.5% accuracy, regardless of whether the individuals are carrying Wi-Fi devices. The tactic leverages the router's beamforming tech to identify individuals with up to 99.5% accuracy, and it works with existing routers, too.

The system, called BFId, requires no specialized hardware, no access to the target Wi-Fi network, and works even if the person being tracked isn't carrying a wireless device. The team tested the attack on 197 participants, the largest dataset ever used in Wi-Fi-based identification works, and plans to present its findings at the ACM Conference on Computer and Communications Security (CCS) in Taipei.

See GitHub — https://github.com/ruvnet/RuVi... — for your own personal implementation requiring a couple of APs and a couple of ESP32 nodes. You can get full-home per-zone motion and occupancy detection fairly reliably, with the potential for pose detection and in optimal areas even respiration rate. With the right hardware and configuration, you can theoretically get heart rate too.

Comment Re:Lithium isn't rare, and it is important (Score 1) 51

That's not clear. The problems are real, but some of them already have solutions, and perhaps the others will eventually have solutions also. Also all of the alternatives have their own problems.

The folks working on sodium based batteries have made tremendous progress recently, but there's no proof that analogous advances aren't possible for lithium. At any particular time, you weigh your options, and decide based on the choices available, but that doesn't tell you what the choices will be next week. For that matter, lab results often don't scale commercially. So take this article with a few grains of salt.

Comment Re:Lithium isn't rare, and it is important (Score 1) 51

Actually lithium should make more powerful and lighter batteries. That's been known for nearly a century. The details come when it turns to practical design.

I forget the details, but I seem to recall that lithium should be half again as powerful per unit weight as sodium. (That might be an underestimate.) But this doesn't include things like flammability, growth of metallic extrusions, etc. Dealing with the details can easily be enough to change that balance.

Comment I have been testing FreeBSD 15.1 on my extra PC (Score 1) 66

I used to run the BSD's all the time in the old days and use them for servers, firewalls, but for the last decade or more its been Linux only for me.

I have been running a KDE desktop lately using FreeBSD 15.1 Beta for a few weeks on my extra PC and using it for some stuff, and its been surprisingly nice, even with Wayland.

And the "boot environments" stuff with ZFS snapshots, makes it very nice and easy to have automatic bootable snapshots, and provides pretty much the same functionality as btrfs+snapper+grub.

My main daily driver desktop PC is Linux, but so far it seems to me that if you don't need gaming, FreeBSD is not a bad desktop OS at all.

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