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Comment Re:Why? (Score 2) 65

Sorry, but I just don't understand what the purpose is, and it isn't stated in the thread linked -- other than a few ... (maybe) benchmarks that don't cover many real-world use cases.

With CFQ, an high disk-IO task will block every other process on the system from getting any time. This can be a big file cp, but I see it most often when writing to slow USB thumb drives... Queue up a copy/rsync/etc. of a few GBytes of data to a slow thumb drive, and after your RAM/buffer cache is filled, your system will be almost completely unresponsive.

Change your scheduler from CFQ to deadline and your system will spring back to life. I don't specifically know that BFQ does any better, but it couldn't possibly be worse... CFQ is crap.

Comment Re:Just 5 billions for 200 MW?? (Score 2) 181

We are going to need portable fusion if we ever want to do serious interstellar travel.

Fission (which we've had for decades) is a perfectly workable and acceptable energy source for "serious interstellar travel".

From battleships to trains to large aircraft to small aircraft: they have a use at many scales where high energy density (production) is required or preferred.

Fission works nicely for aircraft carriers, already. Trains are better accommodated by electrification via overhead power lines.

It's completely crazy to claim "small aircraft" would be a suitable use-case for a fusion power plant... A bit like saying a massive turbine could "have a use" in your leaf-blower.

Comment Re:Prohibited (Score 1) 336

Brilliant, exchange a cheap hard to track device for an expensive device that transmits continuously,

Low-end smart phones are just as cheap as the least expensive unlicensed 2-way radios. You can quite easily and 100% reliably shut-off the cellular radio, while still using WiFi. They are certainly no easier to track than an unencrypted 2-way radio.

Comment Re:Remember the NASA Wind Turbines? (Score 1) 178

Current blades are trucked in one piece (per blade) which is impressive to see. Three of them were parked on I-5 outside of Patterson, California a few months ago. There are a lot of net videos and photos which convey the scale.

Even at the current size they can't get through many highway interchanges and local intersections. The larger ones won't be able to ship in one piece at all.

Comment Remember the NASA Wind Turbines? (Score 4, Interesting) 178

NASA Wind Turbines approached this scale in the '80's. Unfortunately, this was a previously-unexplored area of aerodynamics for NASA, and they had mechanical stress and noise problems (including subsonics) and were all demolished. I think there was one near Vallejo, CA being taken down when I got to Pixar in '87, and one in Boone, NC, which famously rattled windows and doors.

The art has since improved. I took a ride to the top of the turbine at Grouse Mountain, that was fun! That's the only one I have heard of where you can actually get to see it from the top.

Comment Starting out with the wrong assumptions (Score 2) 165

This is starting out with the wrong assumptions.

Design a brick system that can be produced with 3-D printers, and will hold together when fabricated within the tolerances of an SLA printer. Forget FDM, it's too low precision and SLA is already achieving an equal or lower cost of manufacture compared with FDM.

LEGO is manufactured to astonishingly high precision, but I am not convinced that this is the only way to make a brick system.

Comment Re:Cameras are so, so tiny these days (Score 1) 233

You cannot physically enforce security of code sources you are allowing people to see - unless you are going to have them work entirely naked, under constant physical observation, with full body cavity searches every time they enter or leave the workroom.

Memorize a few lines per-day, then write them down as soon as you leave the office... That's how exam/test prep software gets their questions. You need several people doing this, working together, but it will be possible to smuggle out your secrets, no matter how hard to try to avoid it.

Not to mention that a tiny wireless transmitter could even be hidden in a tooth, or implanted under the skin, somewhere, which would work even if you need to use Morse-code. More realistically, a micro SD card is TINY and unlikely even a cavity search would find it.

Comment Re:Is it really a big issue? (Score 1) 293

So, we have driverless cars. You still buy insurance to protect yourself and liability.

The disruption is that insurance companies will have to dramatically shrink, instead of growing. If there's only 1/10th as many accidents, they can only charge 1/10th as much in premiums. That means they have to reduce their employees, office-space, and more by a factor of 10, and only have 1/10th as much profit to play with.

It's actually worse than that, as they'll try to maintain a higher percentage of the premium as profits, much like oil companies do when oil prices fall, which means your 10X less valuable insurance might still only save you 50% the premium... The slide in their valuation will hit them and the stock market, and they're open to disruption by leaner start-ups who don't have the huge existing liabilities the big insurance companies can't shake-off so easily.

Comment Re:trying to figure out how to survive (Score 1) 293

On average it will always be cheaper to pay for things yourself, however people are NOT any good at saving $50K of oh-sh*t money

I have over $35,000 in insurance. I pay just over $350 each year for the policy. In other words, it would take 100 years of saving my premiums to match the coverage I've got.

I don't expect to live that long. I can't wait 100 years for that balance to accumulate, before I start driving. My insurance will cover multiple accidents in that 100 years, not just one (though my rates would go up after the first one, changing the math somewhat). My premiums also cover related expenses like insurance company lawyers that I'd have to pay for on top of that cash balance.

The your claim looks even more ridiculous if you look at homeowners insurance... Millions of dollars in coverage.

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