Also note that due to isotope decay in the ore, a natural reactor is no longer possible. From the wikipedia article:
"A key factor that made the reaction possible was that, at the time the reactor went critical 1.7 billion years ago, the fissile isotope 235U made up about 3.1% of the natural uranium, which is comparable to the amount used in some of today's reactors. [...] the current abundance of 235U in natural uranium is only 0.72%. A natural nuclear reactor is therefore no longer possible on Earth without heavy water or graphite."
Another fascinating detail from the article, due to our understanding of fission, we can get some incredible results:
"The concentrations of xenon isotopes, found trapped in mineral formations 2 billion years later, make it possible to calculate the specific time intervals of reactor operation: approximately 30 minutes of criticality followed by 2 hours and 30 minutes of cooling down"
Another example is the Honeywell corporation: from thermostats to computers, then parts of defense/aerospace. Looking at its wikipedia, it also seems like one factor of diversification was the WWII war economy where the government paid lots of different corporations to build new stuff: https://en.wikipedia.org/wiki/Honeywell
hacker news really needs a best-of page the way craigslist did (sorry, does), just so I can nominate this. Made me discover a great song (and a great cover), with such a wry commentary (the song's and your own comment being spot on for the original drivel). Or like we used to say, you win the internet for today.
The island of Kaua'i in Hawaii has both tours of a chocolate farm (Lydgate Farms) and a coffee plantation (Kaua'i Coffee) with a visitor center. Just gotta find a conference out there, then hop on a Southwest flight.
I disagree, I appreciate the just-the-facts approach which leads to brevity and clarity. It may not lead to a complete understanding (such as the info provided by your parent comment), but chances are that following links in Wikipedia will find a lot of the same info.
I feel a lot of science writing appeals to emotion and has to overplay their subject matter to get readers, burying many interesting or relevant details deep in a long article. Wikipedia may be dry, but it avoids that.
Of course, different people like different styles, so some people learn better or enjoy narrative and story, others want dry facts. But it’s not a problem with Wikipedia.
I'm with you on the size, which is why I still have the SE myself.
It also bugs me that no one is showing a comparison of the new SE to the old SE, so here is an old article I found, 2nd photo is the 7 (5.5 in), 6 (4.7 in == new SE), and old SE (4 in).
So the new SE is bigger, but still acceptably small for most people. It seems like Apple couldn't bring themselves to make it any smaller. And at this price with these features, it will be my next upgrade (in 2-3 years), and I predict it will sell like hot-cakes.
With renewable energy and local batteries, it would make sense to have DC wiring. It used to only be that off-grid systems had batteries (usually lead-acid), and they always just use an inverter. But now with battery packs such as the Tesla Powerwall, even grid-connected houses have DC storage.
Unfortunately, Powerwalls and other similar products are made with built-in inverters and connect only to AC, there is no DC tap. And there aren't any standards around DC wiring and small appliances, so it isn't likely to get traction.
I'm mentioned before (https://news.ycombinator.com/item?id=21109247) that I've seen a DC installation at a friend's house, he used 12V cable lights and DC bulbs, so it seems to work.
But where is the DC coming from? If it is a cheap power source (a rectifier plugged or wired into AC), the DC into the lights could be intermittent, and so cause flicker. For true continuous DC, you need a good rectifier or get the current directly from batteries.
Please don't be that EV owner that mooches off of "free" sockets. Or at least ask first. RV parks aren't expecting people to use $5-10 of electricity overnight, and they'll get upset at EV owners.
Just get the 200kwH model (my est for the 500 mi range), plug the RV into the truck, and go boondocking for a week with A/C, fridge, induction cooker, and no propane. Extra bonus if the truck supports charging from the 2kW array on the roof of the RV.
Indeed, the idea of information (bits) as entropy is fascinating to me too. And not just Shannon entropy, they're all related somehow. See https://en.wikipedia.org/wiki/Bekenstein_bound
And then there is the fact that life encodes and persists information. There was a recent HN thread that got me interested: