mackwinston @ mackwinston @feddit.uk

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2 yr. ago

Oscillators for computers are quite easy to detect because they create an enormous series of harmonics, and relatively strong ones. This is because a typical oscillator for this application is square wave, and an ideal square wave is the sum of sine waves starting at the fundamental frequency, with each 3rd harmonic 1/3rd of the power as the previous (so if you have a 25MHz oscillator, you'll have the fundamental frequency of 25MHz at amplitude 1, 75MHz at amplitude 0.33, 125MHz at amplitude 0.11 and so on ad infinitum). Eventually you may end up with a PCB trace or wire that just accidentally happens to be the right length to be resonant, and that harmonic will radiate quite strongly.

When your intended signal is minuscule, it doesn't take much to have it swamped by some unintentional radiator - at the very least it's extra noise you need to deal with.

A good example of unintentional radiators swamping a signal, a problem with some aircraft VHF com radios when receiving is that something like the 11th harmonic of the local oscillator (used to tune the radio) on certain VHF channels will completely swamp the GPS L1 band as it leaks out the VHF radio. The signal strength of this harmonic is absolutely minuscule, but it's huge compared to the GPS L1 signal, and it's the LO in the receiver rather than a spurious emission from the transmitter (part of the procedure of fitting a new VHF radio to an aircraft is making sure it doesn't interfere with a GPS receiver, and if it does, a stub filter usually needs to be fitted to the antenna port of the radio).

I wonder what the T&Cs are like?

I'm fortunate as in I have an ISP that (a) gives me a static IP address (b) doesn't have restrictive T&Cs, so I can run my hobby-related servers at home. That's really the biggest benefit of fibre for me - enough upstream that I can self-host my servers.

Not the OP. I'm not a vegan, and not even a vegetarian - however, I have hugely cut down on meat consumption because our western diet expectation of having meat in every single meal is absurdly excessive, and in my case resulting in increased cholesterol and other health risks. So I've cut back massively on meat such that it's once a week, and something very lean.

Lab grown meat has all the problems that farmed meat has, by and large, in terms of health impacts and energy intensiveness.

The other thing is that since going to a mostly plant based diet, is I've found I simply do not miss meat, in particular I don't miss red meat at all. So even if lab grown red meat could be less unhealthy, I'll still give it a miss because plant based food is to be honest perfectly enjoyable. I would imagine many vegetarians and vegans won't eat lab grown meat because they just don't need it to enjoy food. I think it's such a shame that so many eat lots of meat "politically" that they won't even try reducing their meat consumption and finding other foods that are just as pleasurable, and a lot less damaging to their long term health.

I'm not a vegan, not even a vegetarian - but your message is so full of logical fallacies and whataboutisms, it's enough to drive someone to veganism. Is that really the best you can do?

The first sentence is like when a child has done something wrong, and their mother tells them off, so the child says "Well,

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I thought e-passport gates already did this? Not that they ever work for me, in the last year I've always ended up having to go through the (very scantly staffed) staffed passport gates because the e-passport gate doesn't seem to be able to recognise me.

Context is important. From the context, the OP was talking just about disposable vapes.

The thing is if it were you or I being investigated, we'd have the RIP Act thrown at us with the threat of a custodial sentence, no doubt, for not revealing the password.

This is why I've decided against running my own Lemmy instance. Too much work to have to keep up constantly with updating, too big of an attractive target for attackers.