ridgeguy

22 ms·

1. 241.▲
   by ridgeguy 5y ago

   Thanks for posting this. I'm grateful for the images of predecessors, captured when they were going about their daily lives. t looked like they were in the main happy to be alive.
2. 242.▲
   by ridgeguy 5y ago

   I so agree with you. Comcast could have built out service in so many of our current residential areas, but chose not to. For no apparent reason but that it cost capex. There was so much funding to extend internet access to rural areas. None
3. 243.▲
   by ridgeguy 5y ago

   Our experience differs from your view. We recently moved from the Bay Area to the Sierra Foothills, near Sonora. There is plenty of land with homes already in place, as well as land suitable for new construction. Land is available in sizes
4. 244.▲
   by ridgeguy 5y ago

   Not a substantive comment here, just saying thanks for this extremely cool thing.
5. 245.▲
   by ridgeguy 5y ago

   A properties comparison between Be and the paper's SiC ceramic is here [1]. Be is lower density, which would matter for payload mass. The SiC material has a much lower thermal expansion coefficient and change of CTE with temperature, b
6. 246.▲
   by ridgeguy 5y ago

   Depends on how old your installation is. Our prior home had pilot lights for the gas furnace, stove/ovens, and water heater. No electric igniters. All the items were pretty dated. But when the grid went down, they kept working.
7. 247.▲
   by ridgeguy 5y ago

   Important goals can take long efforts to achieve. For something as novel and complex as JWST, I don't find its quarter-century development time surprising or odious. Cathedral Notre Dame was begun in 1163, took 182 years to complete. W
8. 248.▲
   by ridgeguy 5y ago

   I'll try - Top level: reliable access to a home, food and clean water, education, medical care, employment. Doesn't cover everyone's want list, but to many of us, a future without those feels a lot different from one with the
9. 249.▲
   by ridgeguy 5y ago

   Nuclear reactors produce neutrinos and they can be detected [1]. For modulation, maybe vary the reactor power output (low bit rate, to be sure). People have explored neutrinos for communication with submerged submarines [2]. [1] https:&#x2
10. 250.▲
    by ridgeguy 5y ago

    There are RF power devices that consist of GaN structures built on a CVD diamond substrate. Diamond's thermal conductivity is uniquely high. The diamond substrate conducts heat away from the GaN FETs. RFHIC uses this technology in some
11. 251.▲
    by ridgeguy 5y ago

    I think SiC devices will be a way station on the road to diamond devices for extreme environments. GaN devices will be the next after SiC, then on to diamond. I've seen a diamond FET operating at 700°C. Devices like that could use the
12. 252.▲
    by ridgeguy 5y ago

    Seems like a Pyrrhic dynamic. I can't see how to make the lives of 1 billion Chinese worse without having similar effects on the rest of the first world.
13. 253.▲
    by ridgeguy 5y ago

    Xenon is a very minor trace component of air. It's collected as a byproduct during fractional cryo-distillation of air to make LOX and liquid nitrogen. [1] [1] https://en.wikipedia.org/wiki/Xenon#Occurrence_and_p
14. 254.▲
    by ridgeguy 5y ago

    Hey, no shame! A friend gave me a natural halite (salt) crystal that has beautiful purple coloration from natural radiation. Not radioactive, but purple mainly due to displaced electrons that formed color centers. It had great sharply defin
15. 255.▲
    by ridgeguy 5y ago

    I'm with you. In the Israel Museum, there are ceramic pots from ~ 5K - 7K years ago with the makers' fingerprints easily visible. I couldn't help wondering who they were, how they lived their lives, etc.
16. 256.▲
    by ridgeguy 5y ago

    Downvoted because you assert a simplistic and erroneous equivalence between damage caused by sugar consumption and that caused by a communicable disease. If you eat sugar, you don't endanger others' health. If you don't get v
17. 257.▲
    by ridgeguy 5y ago

    CO poisoning leaves a telltale bright red skin coloration in human victims. CO prevents oxygen release from hemoglobin, making venous blood near the skin as red as arterial (oxygenated) blood. I think responders would have seen this if CO w
18. 258.▲
    by ridgeguy 5y ago

    Any chance they died because they walked into a carbon dioxide accumulation? CO2 is heavier than air and can accumulate in natural hollows. I've read about game animals suffocating rapidly when they walk through CO2-filled hollows, bu
19. 259.▲
    by ridgeguy 5y ago

    I attended high school in Phoenix in the late 1960s. There was a widespread irrigation infrastructure that consisted of gated ditches running throughout residential areas. This was way before drip irrigation or other water conservation meas
20. 260.▲
    by ridgeguy 5y ago

    Yeah, I'm old enough to remember that era, too. My first encounter with a microwave was at far Bob's in Pasadena. Finals had just ended at Cal Tech and I walked to far Bob's to decompress. I had no knowledge of microwave oven
21. 261.▲
    by ridgeguy 5y ago

    I think OP wrote .25¢/gallon, not 25¢/gallon.
22. 262.▲
    by ridgeguy 5y ago

    > Every organ, vessel, and part of your body, especially your brain, is dedicated to keeping you alive for as long as possible. On the contrary, I think every part of my body is dedicated to making sure my DNA propagates. But, being cons
23. 263.▲
    by ridgeguy 5y ago

    Platinum-cobalt magnets were used in performance-critical TWTs before the advent of rare earth magnets. Might be interesting to drill out a tiny sample of the TWT magnets for analysis.
24. 264.▲
    by ridgeguy 5y ago

    A good read on the genesis of the American War on Drugs is the book "Chasing the Scream", by Johann Hari.
25. 265.▲
    by ridgeguy 5y ago

    Can you say more about using LN2 to clean dusty floors? Asking for a friend.
26. 266.▲
    by ridgeguy 5y ago

    This would prevent me, an individual inventor of (I'll claim) non-ridiculous inventions, from monetizing my efforts. The monetary barriers to patent protection and enforcement are already significant to me. I can't be the only one
27. 267.▲
    by ridgeguy 5y ago

    Apple AirPods Max headphones. It's been a long time since I was so pleased with a hardware purchase.
28. 268.▲
    by ridgeguy 5y ago

    After the planned flight program concludes, would it be possible to have Ingenuity follow Perseverance on the rover's travels? Perseverance moves pretty slowly - it would seem straightforward to have Ingenuity do a daily catch-up fligh
29. 269.▲
    by ridgeguy 5y ago

    It does [1]. But I believe this can be overruled by mutual assent, i.e., by contract. [1] https://www.californialaborandemploymentlaw.net/2017/intelle...
30. 270.▲
    by ridgeguy 6y ago

    Just saw your reply. Thank you, this will help.