hwillis

71 ms·

721.
by hwillis 6y ago
Nuclear reactions don't just make EMPs; it's not like nuclear plants are emitting continuous electromagnetic interference. Nuclear EMPs are created when radiation ionizes susceptible atoms, creating charged particles via Compton
722.
by hwillis 6y ago
The initial fireball of a nuke is caused by xrays absorbed by air and develops in microseconds. Basically all at once, since the xrays move at the speed of light. A spherical region of air just ionizes. The expanding fireball moves quite
723.
by hwillis 6y ago
> Wouldn't the display application here be something like a scanning AR/VR headset which constructs an image directly on your retina with a small number of beams moving very quickly (kinda like an old CRT display)? That would o
724.
by hwillis 6y ago
> Curious how they phase synchronize so many light emitters but the full paper looks like $$ I sent a request on their researchgate: https://www.researchgate.net/publication/339277200_Chip-scal... There's only
725.
by hwillis 6y ago
This is quite a cool paper. I haven't read the full thing yet, but any talk of displays is EXTREMELY premature. This isn't even one pixel - it's steerable in only one direction. In order to steer in two directions, you&#x
726.
by hwillis 6y ago
They did run an experiment on actual batteries. It's still only one kind of cell, but they have actual experimental evidence: https://ars.els-cdn.com/content/image/1-s2.0-S03605442173068...
727.
by hwillis 6y ago
or like... turn the TV off during a power outage.
728.
by hwillis 6y ago
Hah, I graduated from UofR- I was even a TA for Physics 142. Math does not have anything to say about sums of sine waves being the true form of functions. The wavelet transform is just as physically representative. In fact you can gene
729.
by hwillis 6y ago
Waves in water are surface gravity waves, which air does not have. Because water is pretty incompressible, high pressure causes a water column to rise against gravity. The rate at which the column falls back down is obviously dictated by
730.
by hwillis 6y ago
> Everything is a combination of sine waves. No, we hear things as if they were a combination of sinusoidal waves (mostly). That's only one way to represent them; you can just as easily represent them as a series of impulses. Ma
731.
by hwillis 6y ago
My second word seems... quite questionable: nonhumanoid 1. not having life "a nonhumanoid woman" https://www.thisworddoesnotexist.com/w/nonhumanoid/eyJ3IjogI...
732.
by hwillis 6y ago
> According to Snopes some parts of it can also be deemed as misinformation (like the picture framed as Biden groping Stephanie Carter). It has the full, unedited video segment, and you can't even send that site in a direct message
733.
by hwillis 6y ago
It's common for specialty contracts (aerospace, nuclear, defense etc) to be awarded based on need. The government is conscious of how competitive the industry is, and tries to keep several firms alive in any one sector regardless of w
734.
by hwillis 7y ago
yeah sure I'd loooove to have preexisting conditions back
735.
by hwillis 7y ago
somebody has no idea what Marx was actually like, said or wrote... > But, once adopted into the production process of capital, the means of labour passes through different metamorphoses, whose culmination is the machine, or rather, an au
736.
by hwillis 7y ago
For complex reasons, ducted fans are generally quieter, but less efficient if you arent going quite fast.
737.
by hwillis 7y ago
USPS delivers packages much faster, more efficiently (fewer stops), significantly more cheaply, and with better employee pay and benefits. Medicare negotiates far more effectively than private insurance (although obviously that isn't
738.
by hwillis 7y ago
Complete opposite. Arguably better would be to look at local population density, but even that is just a proxy for how easily the virus should spread. Total number is much better than per-capita, because the point is to see how quickly t
739.
by hwillis 7y ago
> The video shows a plot of "new cases", which might be measuring the rollout of testing Maybe, but probably not given how consistent the trend is over time, response, and as the disease progresses. > It is also not showing
740.
by hwillis 7y ago
That accounts for the left-right gap between countries as they follow the same trajectory upwards. That is to say, it is almost totally irrelevant when the data is displayed this way.
741.
by hwillis 7y ago
If you read the GAO report[1], most of the costs are due to commercial outsourcing- either outright failures on the part of private contractors, like the unreliable automated systems, plane arrestors, and other misc. equipment and services,
742.
by hwillis 7y ago
> It's a shame they also haven't wasted redundancy resources on the electromagnetic catapult system used to launch aircraft, and which as of 2018 had a failure rate consistent with a 70% chance of completing a full day of fligh
743.
by hwillis 7y ago
> Engineering in the traditional sense plays very little role in modern defense systems. The overriding concern is profit: How can we extract the most money from the DoD? Good engineering that avoids recurring costs is discouraged in fav
744.
by hwillis 7y ago
The DoD will not hesitate for a second to call in contractors if they aren't confident in their crew. I'm sure they did so in this case. Even though you're just flying a few guys (say a few acid guys, maybe an engineer who k
745.
by hwillis 7y ago
4,656 to 4,758 crewmen, at $391 million average annual.
746.
by hwillis 7y ago
It's also not just about the ocean- hepatitis A spreads quite regularly when shellfish feed on contaminated sewage. https://www.youtube.com/watch?v=VGJLKhsLx18&ab_channel=Steve...
747.
by hwillis 7y ago
Engineering has a much stronger and more specific focus on avoiding "unexpected" problems like this. At its most general you use things like dimensional analysis to identify and avoid issues that you can't specifically fores
748.
by hwillis 7y ago
get a loupe!
749.
by hwillis 7y ago
I mean that's pretty clearly much more reasonable. It's even likely that unstable countries which don't foster services to fight disease are also more susceptible to authoritarian coups. More to the point, I think framing it
750.
by hwillis 7y ago
And even up until 1972 the command economy in the north and the (more) liberalized economy in the south hadn't really diverged. NK's growth slowed as they lost the support of the USSR and went negative during the collapse. Not r

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