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Comment Re:What Does This Mean? (Score 2) 414

If you're off by nearly the width of a human hair, it's not a perfect circle now, is it? Sheesh.

You can navigate in a perfect circle, but when you reach the end of the perfect circle there will be a little left over because the number you were using for pi to calculate the circumference was off.

However, don't let me interrupt what must be a satisfying eye roll for you. I'm glad to see cowards on Slashdot have remained as polite as ever.

Comment and you use Slashdot (Score 1) 214

Anyone know if it's possible to do this for Slashdot? Every single post read, every login, every IP address, perhaps supposedly anonymous posts, every moderation, etc. And with Slashdot, there isn't the ability to even delete anything. The only saving grace is that most people don't attach their real names to their accounts.

Comment Re:any signal can be found and killed (Score 1) 417

Sure. I install a faraday cage around my home. You come over and your cell phone doesn't work. I did this knowing that your cell phone wouldn't work, but I haven't actively done anything to your phone. I've passively interfered with its operation by actively targeting something else -- its dependency on being able to transmit and receive EM signals beyond the confines of my home which are currently blocked by my faraday cage.

Now not knowing the specifics of what North Korea did, I'm only speculating. If they sent a high-intensity EM beam aimed directly at the drone that disrupted the drone's systems then that would be an active measure. On the other hand, if they flooded their airspace such that GPS signals coming from a North-bound direction did not arrive at the drone's location then that would be a passive measure. It's the difference between overloading the drone's GPS receiver (active) and producing a signal inverse to the GPS signal, thereby canceling it out and little to no signal arrives to the drone (passive).

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