leoedin

52 ms·

661.
by leoedin 5y ago
Apparently the same thing has happened with Elvis memorabilia. It's the natural cycle of collectibles. People start dying and flooding the market at the same time that demand dries up
662.
by leoedin 5y ago
Not commenting on the rest of your comment, but > Chinese women have more children than American women The fertility rate of the USA and China is the same - 1.7 children per couple. China's facing a huge demographic crisis in the co
663.
by leoedin 5y ago
Efficiency is hard to measure because there's such a mix of fuels. Hydro is very efficient, but also a very small part of the generation mix in most places. Nuclear is pretty hard to measure - the actual thermodynamic efficiency of ext
664.
by leoedin 5y ago
Resistive heaters are only highly efficient if you draw the boundaries of your system very tightly. If you take into account the losses during generation, it's a terrible picture. It's far, far more efficient to burn the fuel dire
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by leoedin 5y ago
Some of them best tomatoes I've ever had came (in winter!) from Thanet Earth, a massive indoor grow op in Kent, England. They grow all year under massive grow lights. I think a lot of the really good flavours in tomatoes are a function
666.
by leoedin 5y ago
Unfortunately this article (like most news articles seem to) mixes up kW and kWh, so we don't actually know how big his off grid solar system is. I'm guessing 8 kW (or 8 kWh per hour, without capacity factor taken into account). I
667.
by leoedin 5y ago
Wingsuit flying is pretty well known as a hobby that eventually kills almost everyone who does it. It seems once you start flying as close to rocks as you can for fun there's some sort of skill-risk feedback loop that eventually kills
668.
by leoedin 5y ago
I wonder if quite a big part of the problem is that the one child policy normalised single child families for an entire generation. I know for certain that my wife and I both want to have another child because we both grew up with siblings
669.
by leoedin 5y ago
Has anyone worked with bamboo plywood? How does it compare to other plywoods? It doesn't appear (at least on the website linked) to be particularly cheap - a full sheet of 20mm bamboo plywood is almost €300! You could probably buy 3-5
670.
by leoedin 5y ago
Just look at Spain. For historical reasons they're in the European time zone even though they're really aligned with the UK. Culturally they do everything "late" - start work, finish work, eat dinner. That's just th
671.
by leoedin 5y ago
The Uber experience is (or at least used to be before covid) way, way better than London minicabs used to be. Minicabs had no accountability and small fleet sizes - so at peak times they'd either turn up really late or not turn up at a
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by leoedin 5y ago
That just seems like wishful thinking. The Pinephone is barely usable as a phone - it's market penetration in Cameroon must be essentially 0. And what percentage of people have a "favourite desktop environment"? I suspect if
673.
by leoedin 5y ago
Electricity made from fossil fuels is about 40% efficient (depending on method) - so that 100mpg in the car turns into 40mpg overall. The big benefit electric cars have is obviously that they can use renewable energy to charge, which reduce
674.
by leoedin 5y ago
How would you gain energy in that situation? Surely the EV is still expending some energy? The only way that would work is if you were going down hill. The effect of drafting though is incredible. If you're ever able to get behind a bi
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by leoedin 5y ago
It's good to see Balena getting some attention - it's a really nice way of deploying containerised software to embedded devices, and managing them in the field. I've been using the free tier for managing a couple of rpis I ha
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by leoedin 5y ago
Has anyone used this? How does using nodes compare to using text syntax? One of the big problems I've found with openSCAD is that beyond a certain level of complexity it gets very hard to keep a good mental model of the constituent par
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by leoedin 5y ago
Using 10% for a quick calc is fine, if you only use it once. But you then multiplied that error by 3. The resulting assumption - that the transmission losses with 3 transformers would be ~73% (0.9^3) is completely wrong, given that we know
678.
by leoedin 5y ago
The only vaguely practical large scale carbon capture I've seen proposed is to convert plants into biochar which can then be buried [1]. Any "machine" based method just needs huge amounts of capital, manufacturing and energy
679.
by leoedin 5y ago
You're making some low assumptions for efficiency there - 90% is an absolute low end efficiency for transformers under full and non-linear load. Transmission losses for the UK grid average 8% total - regardless of how many transformers
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by leoedin 5y ago
I think I should have added the caveat "with the typical information we give it". I suspect that if we made enough effort at the schematic stage to properly annotate all the nets and define the types of signals flowing around the
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by leoedin 5y ago
An autorouter is perfectly fine for whole classes of electronics. As a basic rule, if you'd happily assemble the circuit on a breadboard or with jumper cables and not worry about signal continuity, the autorouter will be fine. It'
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by leoedin 5y ago
It's really the air tightness that causes CO2 buildup, rather than insulation. "Insulation" tends to mean materials which reduce thermal conduction - e.g. rockwool, PU foam etc. You can have a very well insulated but also wel
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by leoedin 5y ago
Have you ever graphed the accuracy over time for the years you've been doing it? It would be interesting to see if there's a trend in forecasting improvement.
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by leoedin 5y ago
> The national grid is barely keeping up with current demand for electricity, I will be astounded if we manage to pull off anything nearing a reasonable solution to electrifying private vehicles. That's simply untrue - National Grid
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by leoedin 5y ago
We're talking about only selling EVs from 2030, but the state of EV chargers, especially in urban areas, is absolutely dire. And there doesn't seem to be enough recognition of that. Take for example the London borough of Haringey.
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by leoedin 5y ago
It seems kind of crazy that the incredibly distorting effect of consistently low interest rates, quantitive easing and other central bank policies - mostly to the benefit of existing capital owners - is seen as almost a-political in the Wes
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by leoedin 5y ago
Wheels are also great at telling you where a car is going. You can see subtle changes in the direction of the wheels much better than you can intuit the car's direction by looking at its body.
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by leoedin 5y ago
Did the author consider bottom firing LEDs? ( https://www.kingbrightusa.com/category.asp?catalog_name=LED&... ) - they are like SMD LEDs, but the light comes out the bottom - the footprint needs to include a hole between
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by leoedin 5y ago
I've used SweetHome3D to plan various rooms for renovation - it's very intuitive and surprisingly powerful. Definitely better than trying to do building design with a "real" CAD package. The built in library is pretty co
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by leoedin 5y ago
Yeah, this part is crazy. There's vast parts of North America which are frozen solid for 5 months of the year. The fact they'd ship it all the way to Antarctica without testing on snow is just crazy! I guess it's the waterfal

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