Nice. I made something similar ~6 years ago, yours is a lot better though.

https://erikburt.github.io/TSequencer/

Your claim doesn’t seem as definitive as you present it, for China and US at least.

Comparing China and the US it seems like theres a 150 billion ton difference in the cumulative emissions.

Most recent data shows China emitting ~8 billion tons more than the US annually. At that rate that’s about ~20yrs until they flip.

China’s emissions appear to increasing exponentially YoY whereas the US has seen reductions in recent years. That makes it seem like they’d flip in less than 20 years.

Obviously, the emissions on a per capita basis are still nowhere close.

From: https://ourworldindata.org/co2-emissions

The pressure inside the bottle is the same as the outside. So it’s not the same as stomping on an empty bottle.

That probably means you are an outlier.

One thing I see, is that people in urban environments typically opt-in to exercise (like voluntarily going on a run). Whereas those in more rural areas have more physical demanding jobs and responsibilities.

I’m an urban-based desk jockey who exercises a lot but it doesn’t really compare to my more rurally-based friends who are on their feet working blue collar jobs 5 days a week.

no, I am talking about actual urban environments where people get around by walking, cycling, or maybe using public transit. Sure, I voluntarily lift and go for a run. But if I want to see friends, buy food, go to the doctor, go to the pharmacy or the record store or the gym or generally leave my apartment I have to walk.

Suburbanites who are only active while engaging in intentional exercise because they need to get in their car to go anywhere are in the worst situation.

I get 1 mile of walking in a day at a minimum just going to and from the train in Chicago. I hit the 6K steps minimum that my watch wants by default every day by around 1-2pm if I take the bus transfer from the train to my office. I usually end around 8-10K steps just doing my commute and walking around the office. Going to the grocery store is another 2K steps roundtrip. Going out to dinner is another 1+ mile of walking minimum unless I get fast food.

When I lived in suburbs, I had to go out of my way to get even 6K steps in a whole day.

> Suburbanites who are only active while engaging in intentional exercise because they need to get in their car to go anywhere are in the worst situation.

This is true. We have nowhere to go on foot. In every direction we have roads, private property and that's it.

If we walk we risk automobile/pedestrian injury, unless we'd prefer to risk trespassing charges. This is also the full selection of kids' choices, btw.

> This is also the full selection of kids' choices, btw.

I grew up in an environment where these where my choices and it was terrible, it's a big part of why I've made "being able to go anywhere on foot" a goal.

I know very little about MRIs, but it seems likely that they could recalibrate the machine and effectively adjust for something small.

Not removing it sounds dangerous though.

The problem is that normal MRI math tries its damnedest to avoid actually solving the right equations. Instead, with a flat enough field, you can assume linearity and just FFT the thing. They'll physically place bits of metal and magnets at various places on the big magnet to calibrate and better adjust the field to being approximately linear. A hunk of metal bigger than a shim sounds like it would mess with that.

Shim it with some more pens?

It would come off ok, this happens from time to time, but that facility needs to lift its game.

Peripheral staff (nurses, anaesthetic techs etc) visiting are the usual source of these accidents.

It is fairly short, but seems like enough time to get a baseline of habits across nearly 90,000 participants.

This makes sense. A lot of end-users have internet speeds that can outpace the decompression speeds of heavily compressed files. Seems like there would be an irrational psychological aspect to it as well.

Unfortunately for the hoster, they either have to eat the cost of the added bandwidth from a larger file or have people complain about slow decompression.

Well the difference is quite a bit more manageable in practice since you’re talking about single digit space difference vs a 2-100x performance in decompression.

The author guessed it was a result of database contention.

I’d also be interested in getting a concrete reason though.

But if the system partition could be smaller, other partitions could be larger.

The system partition is made some fixed size, the same way disk partitioning works on PCs, and never resized, because resizing file systems is still a non-trivial task. It often has some free space too to accommodate future system updates.

On my 128 GB Pixel 9 Pro, /data is 109 GB. The rest is /system (although `df -h` doesn't show it explicitly, no idea what's up with that) and various other system-related partitions.

Yes, but if the phone shipped with less bloatware on the system partition, then maybe that partition would be made smaller initially.

Meaning the user would have access to more of the phone’s advertised storage.

You have succeeded in splitting hairs down to the atomic level. Fissionable HN comments!!

Or perhaps there would be less incentive for the OEM optimize for disk space and it ends up taking the same amount of space.

They mentioned that it was 20% efficient at a closer distance.

So likely much lower than that.

20% efficiency in terms of light -> electricity. A 50% laser efficiency (electricity -> light) is really good, possible for some diode lasers, if you pump a fiber laser with diodes to get a high quality beam for cutting materials or weapons purposes maybe you get 25%.

That demo would require about 45 kW of laser power with good beam quality which would be totally possible with a fiber laser

https://www.rp-photonics.com/wall_plug_efficiency.html

Wow that's a long way from the proposals for sending GW of microwave power from satellites.

Those sat to ground power sources use gallium arsenide switched FETs = synchronous rectification, avoiding the voltage drop of diodes has been tested on a small scale, the 10GW orbital 35% efficient solar arrays, maybe next week... Solar boilers, end to end, are more efficient than solar cells, but mechanical complexity(leaks, corrosion, worker avarice) made one US plan in the South West non viable. As we sit silicon-perovskite tandem solar cells will top out around 42-45% - unless Schockley is end runned? Ternary -??. A good lecture = https://www.youtube.com/watch?v=Ft0VJX0_Td0&t=2s&ab_channel=...

Solar thermal as well as solar-chemical systems have the problem of start-up.

PVs do not have any problem starting up, they produce less than full power with less than full illumination but they produce something and once the illumination is full they produce full power immediately.

Many solar thermal power plants are fired with natural gas in the morning to get them spun up to the point where they can take advantage of the solar energy. Without that they'd probably lose a few hours of production.

Laser power beaming from space could be useful at lower power levels than that, for example for powering aircraft.

But pretty close to powering drones from ground stations