jdiez17

22 ms·

241.
by jdiez17 5y ago
Keep in mind that the EM field described in that study is quite strong and the transmitter is very close (actually in contact with the patient's skin). They talk about field intensities of 0.6V/cm. That means that if you put the t
242.
by jdiez17 5y ago
> With phased array beamforming, you're using using multiple small antennae and amplifying the signal beyond the sum of the individual outputs. No, that's impossible. The RF power imparted onto the EM field by any antenna array
243.
by jdiez17 5y ago
Sure, 60 GHz may be a resonant frequency of O₂ molecules and signals at that frequency may transfer energy to them and thus heat them up. However, remember that radio signals lose energy to free space proportional to the (distance and frequ
244.
by jdiez17 5y ago
> Then there's the millimeter wave stuff. [...] I think this is the part the FAA is objecting to for now. mmWave 5G signals are in the 24-54 GHz range (f = c / 0.001 m ≈ 30 GHz)
245.
by jdiez17 5y ago
I was also curious about this, so I looked at the Airworthiness Directive[1] referenced in the example NOTAM. Basically, the argument is that the radio altimeter receivers "must detect faint signals reflected off the ground to measure
246.
by jdiez17 5y ago
No idea. It did seem extremely out of place though.
247.
by jdiez17 5y ago
I don't think you are supposed to be impressed by the number of things that could go wrong. At least, that's not how I see it. They talk about the deployment phase with all these complex things that have to go exactly right as &qu
248.
by jdiez17 5y ago
I think the problem is exactly the opposite.
249.
by jdiez17 5y ago
True, verification is the correct term in this case :)
250.
by jdiez17 5y ago
There's no real silver bullet other than applying the systems engineering process diligently. You start by writing down your user requirements (what the system needs to deliver ), and you follow the thread of figuring out that "t
251.
by jdiez17 5y ago
> Not via some app that is subject to all android restrictions on persistent apps, including occasional unloading from memory Apps are subject to power and resource restrictions, but the user can easily lift those restrictions manually f
252.
by jdiez17 5y ago
While I agree with you that Google is abusing its power in the Android ecosystem to "encourage" (to put it nicely) developers to use their APIs, it is actually possible to manage this imbalance between what Google wants and what w
253.
by jdiez17 5y ago
> what's not to like? Well, the predatory business model, for one. The reason your credit card company can offer you "better consumer protection" and other benefits is because they count on a percentage of people not payin
254.
by jdiez17 5y ago
Totally agreed. I found myself mesmerized watching the short video [1]; wow cool tech, nice views... but there are serious ethical implications for the engineers working on these systems. Let's not forget that our work as technologists
255.
by jdiez17 5y ago
Jeez, that is the dirtiest dark pattern I have heard of so far. Sounds like GLaDOS begging you not to destroy her personality cores [1] [1] https://youtu.be/4CdoufQu1ko
256.
by jdiez17 5y ago
11 dB is pretty impressive, especially if you are just looking at the Doppler shift in the carrier. Which actually begs the question, can you decode anything (e.g. satellite ID) from the downlink/idle signal? If not, how do you figure
257.
by jdiez17 5y ago
I don't have any concrete knowledge to say Starlink satellites rely on GPS, but based on what I know about satellites with thrusters and autonomous formation flying capabilities, they almost certainly have one or more GPS receivers onb
258.
by jdiez17 5y ago
I know some people living in apartments owned by the Berlin. Their experience with state-owned rental agencies is much better than most private landlords. FWIW.
259.
by jdiez17 5y ago
There's Agora Nomic [1] which has been active for many years but I find it rather tedious to get into ongoing Nomic games. I have had a few fun Nomic games on Etherpad + IRC, but it's difficult to find people interested in playing
260.
by jdiez17 5y ago
What makes you think that Apple will use the same database for everyone?
261.
by jdiez17 5y ago
The point is that if the capability for "the iCloud Photos client" to scan your photos before uploading them to the cloud exists, it's only Apple's policy that stops it from scanning all of your photos.
262.
by jdiez17 5y ago
FWIW, I find that aspect of Stephen's videos to be quite wholesome and enjoyable.
263.
by jdiez17 5y ago
Yeah, but I think most people would think there would be a very very low chance of succeeding in this crazy endeavour.
264.
by jdiez17 5y ago
> Could you be more specific? At least for me, there's no noticeable lag when using Evil mode. Long-time Vim user here. I tried switching to Doom Emacs for a few months. I really, really wanted to like it. As a nerd, the infinite cu
265.
by jdiez17 5y ago
You usually only hit the E-stop when the robot is moving in a way that could be dangerous. Safety interlocks are intended to minimize the probability of such a dangerous situation. The robot won't move unless all of the interlocks are
266.
by jdiez17 5y ago
I had a similar experience with Zulip when I tried to set up a chat tool for our research group. I liked the ideas of topics and such, but other people weren't so enthusiastic to learn about a whole new chat paradigm. In the end we swi
267.
by jdiez17 5y ago
I don’t think that’s true. Hydraulics are just a way of transferring/multiplying force, like gears or belts (but much more powerful). The amount of weight to be moved will certainly modulate the energy consumption of the motor.
268.
by jdiez17 5y ago
Both parties could be connected to a bridge device that only allows read commands to pass through the actual drive. They would need to trust that the bridge is not malicious. And that is a whole other rabbit hole. But I think it is possible
269.
by jdiez17 6y ago
I have been looking for a native SQL client that is fast and works well on a HiDPI display. I've spent a few minutes playing around with it and this is exactly it. Thank you for making it!
270.
by jdiez17 6y ago
Except they hijack scrolling (I think their intention is to “snap” to various sections). On my device, that puts the viewport at some point between sections, and I cannot manually scroll to correct it. So I can’t read the content either. We

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