Old public clocks sometimes use the mains frequency as a clock signal to maintain correct time. At the end of the day, the power authority is supposed to adjust the signal slightly to make sure these clocks maintain the correct time.
So I built a device that analyzes mains power supply phase variance with microsecond resolution. It's accurate enough that I can see the power authority turning on and off supplementary turbines to keeps the mains frequency correct.
That's how I determine my level of trust in public clocks.
Well, that and maintaining sub-relativistic velocities relative to them. Which is pretty easy honestly. If you're having problems with this, you've probably ceased to be biology or chemistry and started being physics. So you probably have more pressing concerns than keeping time!
I built it myself. I used an optoisolator to convert the sine wave of AC power to a series of pulses, and also for safety reasons (it communicates data over light pulses, so that the mains power circuit is completely electrically isolated from the stuff I might touch). Then I used a microcontroller to precisely time the deviation from 50Hz, and output a serial port via MAX232. A desktop computer logs the data and gives me a real-time graph of the deviation. I might have some sample files lying around somewhere.
The microcontroller (ATMEGA16) ran at 20MHz using a crystal oscillator, and with some slightly funky tradeoffs, I was able to get a time resolution of 50 nanoseconds with an error of about 20 parts per million. If it deviates too far from 50Hz, I get nonsense measurements due to the tradeoff though (I trade measurement range for precision).
The original idea was to analyze tiny variations in phase at extremely short time scales to use the mains power transmission lines as a sort of large antenna array. Then use that to study space weather (e.g. solar wind, flares, etc.) more cheaply than sending up satellites. As a hardened skeptic, I originally built it as an elaborate practical joke due to all those 'Mayan Calendar Doomsday 2012' folks. You see if the world did end, I would have been in a position of absolutely dreadful embarrassment. So I built it as a sort of 'doomsday detector'.
Sadly, that component of the project never worked. I ran it during some solar activity peaks, and was unable to correlate the measurements taken by satellites to anything I found. It does still allow some weird things though, like I can apparently create a phase variance 'fingerprint' and use that to conclude whether a video was recorded in my city, and at what time. I've heard of some people doing that to youtube videos.
I can also get an idea of the power draw of the city I'm in. As people draw more power, the phase drops, then the power authority turns more turbines on. When the load lightens, the phase goes up, and I can see those turbines being turned off. This is sort of fun to turn on and watch if you get home early, you can see everyone else getting home and turning stuff on.
…does Lemmy.world not have an upload max size? Cause this image is over 6 MB lol. I was suspicious when it was taking so long to load. Surely the limit needs to be set lower, cause the server seems to be having a hard time with the size of this.
This standardisation has already proven itself for multiple years now, with millions of people using it over on Mastodon. People will get used to it. The “this is unfamiliar and scary to me” reaction goes away as the familiarity develops over time.
Yeah that does make sense now that you’ve laid it out, but at the same time I couldn’t care less about seeing the instance info once I’m subbed to something. Even showing my profile as being @lemmy.world is just cumbersome, lame looking, and ultimately unnecssary for so many users. Could be a useful sorting tool for sure, but it would be cleaner to have the option to hide them altogether, y’know? I’m excited to see what all of the devs do with this new platform!
It's not a real Nobel Prize, it's a Bank of Sweden prize and it's a better reflection of Swedish economic politics than true innovation in the field (probably because economics is more applied philosophy than science).
Chicken has been heavily, heavily marketed as a health food, and while it’s not the worst thing you could eat, if you actually look at its nutritional profile it’s not particularly nutritious or “healthy”. That’s just Tyson Foods & co working their magic. It’s more like the ultimate neutral food - nothing terrifying, nothing great, a bit like its taste.
8oz of skinless breast has 250 calories, 0 carbs, and >50g of protein. That’s really nutritious and healthy in my book.
That’s very similar to something like lentils, and a lot better than something like rice which other people are saying but is essentially empty calories with barely any nutritional value.
Macronutrients are not what makes a food healthy. In particular, high-protein does not make a food healthy. By that reasoning a lot of fast food could be considered insanely healthy, but it’s not. That’s just our downright shitty levels of education surrounding nutrition.
What actually makes a food healthy depends on a lot of different factors, but a common one and relatively reliable standard bearer is whether it is “nutritious”. When a food is nutritious or nutrient dense, it is micronutrient dense. This includes things like spinach and beans and seeds and broccoli and all of the other foods that your parents made you eat. Micronutrient poor foods are ones that have relatively few micronutrients, but usually are relatively calorie rich. This includes things like mozzarella sticks, wonderbread, fruit gushers, heavy cream, twinkies, and so on. We do need macronutrients, but virtually anyone who gets enough energy (calories) from food also gets enough of them, except in specific cases like being a professional athlete. The athlete wouldn’t die of protein deprivation if they didn’t pay attention to their intake, but it would make it harder for them to perform well.
So no, chicken is not, by any standard, “really nutritious and healthy”. It’s not completely devoid of nutrients - it’s relatively rich in phosphorus and selenium if you eat it on its own, for example, but it’s far from what anyone would consider nutritious. It’s somewhere in between fried mars bars and spinach.
Lean protein =/= healthy. Like, at all. This is a myth from the freaking 1980s. Nutritional profile is a breakdown of the micronutrients that a food has, and it determines whether a food is “nutritious” and therefore, in general terms, “healthy”.
Please, oh please, don’t go around telling people that food is healthy if it is a lean protein. I’m sure it’s well intended, but it’s also misinformed. If you want to learn about how to assess whether a food is healthy, go make an appointment with a dietitian - your insurance will often cover the first appointment.
Sorry, unfortunately nutrition is more complex than what you can sum up in a few sentences. To answer that though:
Chicken isn’t categorically “unhealthy” in the same way double stuf oreos cooked in lard are - I said in another comment that it’s the ultimate neutral food, and if you look at its profile I think that’s a fair statement. It’s not completely devoid of nutrients, it has a couple of things in significant quantities - phosphorus, selenium, and B3 for example - but overall it’s not very nutrient dense. It doesn’t have a ton of huge negatives either - a bit of saturated fat, but nothing to write home about. If you’re looking at a “Hitler-Hanks” spectrum where the lard oreos are on one end and a spinach chia seed broccoli whatever salad on the other, then chicken is probably right in the middle somewhere. Its D&D alignment is True Neutral. The point I was making in my earlier comment was that “protein” doesn’t make a food healthy, and that there’s a lot more to it than that, and if people use that mental shortcut they might end up making misinformed decisions.
The nutritional profile of chicken would be a lot to type out, but you can look at the NCCDB or Cronometer Gold (which uses NCCDB among others) for an elaborate breakdown. Just keep in mind that it doesn’t capture everything - it’s an amazing tool, but it won’t cover the catechins in your tea, for example.
Ultimately though, if you’re reading this, let me take this opportunity to encourage you to GO SEE A REGISTERED DIETITIAN. Your insurance will often cover 80+% of your first appointment, but even if they don’t it’s an amazing investment. You’ll live longer, probably spend less on food, and spend a lot less on hospital bills after your first heart attack.
Yo for real, what’s up with all these social media sites literally shooting themselves in the foot as we speak?.
Youtube planning to antagonize adblock users and limiting video watching, Reddit killing itself with bureocracy style and now Twitter doing this shit. Hopefully shit sites like TikTok or Facebook jump on the wagon too.
As we have ultimately have set all of our private clocks with public ones as well, we always have to decide which public clock is more trustworthy in those moments. Except if you use a very precise sun dial.
lemmy.world
Active