hwillis

71 ms·

781.
by hwillis 7y ago
People who exercise have lower temperatures during sleep, similar or higher temperatures otherwise, and the same maximum temperature, which occurs during the evening. http://www.altmedrev.com/archive/publications/1
782.
by hwillis 7y ago
The time period being compared to the present is the very early 1900s, shortly after the invention of aspirin. Air pollution and toxic materials were also much more common.
783.
by hwillis 7y ago
People who exercise have lower temperatures during sleep, similar or higher temperatures otherwise, and the same maximum temperature, which occurs during the evening. http://www.altmedrev.com/archive/publications/1
784.
by hwillis 7y ago
> A sedentary lifestyle with minimal exercise has become the norm. The people being studied were in their 20s- obesity has increased 4-5x among children since 1980, but it's still only 20-25% for people in their 20s. Since then we&
785.
by hwillis 7y ago
This study is comparing now to the early 1900s, when Aspirin was just starting to take off. Selection bias probably plays a very large part; they may have been able to measure temperatures but I doubt they were rigorous about taking repres
786.
by hwillis 7y ago
It's false[1]; everywhere in the US is 2-4 F warmer than it was prior to 2000. He may have this impression from looking at 2002, which was a particularly warm year. Some parts of the midwest have been cooler than they were in 2002. T
787.
by hwillis 7y ago
EUV is 20x smaller wavelength, 10000x higher power, and far larger area
788.
by hwillis 7y ago
http://www.umtri.umich.edu/story/simultaneous-deployment-c-v...
789.
by hwillis 7y ago
IMO people, even experts, still hugely underestimate the importance of solar to long term storage. Utility solar is very uncommon in snowy parts of the US, but it's the only place you can reasonably generate winter power. The optimum
790.
by hwillis 7y ago
Why? There's very little information that would be better coming from the road. To drive you want to know where you are, what the road surface conditions are like, where the road goes, and what else is on the road. Road conditions ca
791.
by hwillis 7y ago
> I don't have a source for the detailed cost breakdown, but I can imagine the majority of the cost is labor and digging up/filling the road since the sensor itself should be less than a thousand. Those are installed with a mas
792.
by hwillis 7y ago
> This makes the economics of nuclear just horrible, as it needs to be selling its power at a good price most of the time to make ends meet. Nuclear is not uneconomical just because it only needs to run 50% of the time. That would just
793.
by hwillis 7y ago
truly it is an amazing congruence of mathematics and linguistics that one of my favorite words appears in the real series: 8008135.
794.
by hwillis 7y ago
EDLC's operate at several gigavolts per meter, across a gap only atoms thick. They actually do it the same way as a cell wall -ELD stands for electrostatic double layer- by lining up two sheets of polar molecules, with charges facing
795.
by hwillis 7y ago
In this case the probes were 40 meters apart. At that distance the voltage is normally ~40 mV, which is trivially measurable. Fluke makes a line of fancy multimeters for this kind of thing
796.
by hwillis 7y ago
My point is that the definition of execution hasn't changed, and derived words shouldn't either, to minimize confusion. This is also a plea from an actual electrical engineer, because we generally use it to refer to death. It w
797.
by hwillis 7y ago
The magnetometer stuff is declination, not intensity. Direction of the field. The electrical measurement is in 10s of microvolts per meter and was ~10 mV/m. It's hard to translate that to current since the ground impedance can v
798.
by hwillis 7y ago
It can even kill tons of animals/people at once[1]. Four legged animals are more vulnerable than humans, since the voltage across your heart depends on how far apart your feet are. Also, we wear shoes. Imagine how spooky it would be
799.
by hwillis 7y ago
> Electrocution can refer to both death and injury via electrical shock. I don't like being pedantic about language but given that the word is literally just a portmanteau of electricity and execution it's stupid to use it to r
800.
by hwillis 7y ago
The electrical grid is literally connected to ground at points that can be separated by hundreds of miles. Ground currents cause those points to be at different voltages. Since the wire is very low resistance, this can cause very bad dama
801.
by hwillis 7y ago
For example everything breaking and electrical arcs from outlets. In the early days of the telegraph we did not understand ground currents or the difference in ground potential over geographic distances, and it would occasionally cause lar
802.
by hwillis 7y ago
> If they had two lasers of similar frequencies they would get interference beats/aliases in the data. 1. They did use different frequencies- 1540 nm and 1550 nm. 2. The measuring was done with doppler interferometry, so beats wou
803.
by hwillis 7y ago
The source laser was 1540 nm, the sensing laser was 1550 nm.[1] > For the LUS system reported here, the 1550 nm LDV was specifically selected to maximize permissible optical backscatter from the skin while maintaining safety. > Thus,
804.
by hwillis 7y ago
Oil is used in the transmission and engine. The bearings and most sealed gearboxes use silicone grease. Lots of dampers use silicone oils. In consumer products and anything sealed, silicones are far more common and heavily preferred. PD
805.
by hwillis 7y ago
I was talking specifically about using nuclear to electrify transcontinental lines in the US. Those routes have sections hundreds of kilometers long that are basically desolate.
806.
by hwillis 7y ago
> Nuclear energy and trains are possible, even if they require electrifying the railroads. Note: this is not a great idea; trains release less than a third as much co2 as a truck and electrifying cross country rail would be very expens
807.
by hwillis 7y ago
> Just like imo we’re going to use every drop of oil for plastics, lubricants, composites, military and legacy applications. Still a pretty open question. Those uses are powerfully subsidized by the fuel applications- aside from milit
808.
by hwillis 7y ago
Not really. Chernobyl was explicitly known to have a vulnerability at a very unusual operating point. Fukushima was repeatedly flooded and officials refused to make protections against modest natural disasters. Three Mile Island was a me
809.
by hwillis 7y ago
Shielding is totally irrelevant. Even on land it's insignificant compared to the inverse cube law- spreading the dose reduces it much faster than the shielding, once you aren't right next to the reactor. Radiation exposure is no
810.
by hwillis 7y ago
The US used 3,911 TWh in 2015, or 10.72 TWh per day. Base load is about 40% of daily average. Assume the worst case of only solar- that baseload also continues during the day, so about 30% of it would be powered by solar. That leaves 28%

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