Viewing profile — jubjubbird
jubjubbird
HN member- Joined
- Sun, Jul 26, 2015, 2:42 AM UTC
- HN karma
- 192
- Public activity
- 31 items
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About jubjubbird
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Recent public activity
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Comment #46376724
Department of Interior tried that, but "Interior faces challenges with maintaining a sufficient drone fleet because drones compliant with its policies are more expensive and do not…
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Comment #42204812
Here's a cool demo I saw recently that allows a cyclist to specify risk tolerance for busy roads, based on traffic data. Take the direct, busy route, or the roundabout way, using b…
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Comment #38789907
I'm looking at a legal agreement on my desk to lease 120 acres of productive eastern Nebraska farmland to build a commercial scale solar project. The land would be taken out of pro…
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Comment #37003109
Here's the LK-99 tie in: the most precise gravity meters in the world are superconducting meters, which require a lot of power (2 kW contonuous) to maintain a helium dewar at 4K. I…
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Comment #36226895
The MEMS accelerometers in our phones are in theory sensitive to gravity changes, but they're not nearly sensitive enough. This group is trying to improve the MEMS sensing technolo…
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Comment #36034005
Navajo Generating Station, which was the largest coal-fired ppwer plant in the western U.S. and powered CAP pumping stations, closed in 2019 along with the accompanying coal mine.
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Comment #35964655
Speaking of Albuquerque, this just-published paper shows how measuring the change in acceleration due to gravity can be used to map aquifer storage change. Importation of San Juan …
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Comment #33384503
Too bad Google gets the credit for the amazing https://www.shakealert.org system developed by the USGS and other public entities. Altering the user is the easy part, detecting the …
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Comment #32344795
Seems like more often than not I see them folded up, not in use. Even with the price of diesel. I wonder how much they save?
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Comment #30456369
Apologies for the paywall, but this paper describes imaging cargo containers with gravity gradient sensors (to look for, e.g., plutonium): https://ieeexplore.ieee.org/document/4215…
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Comment #28333234
If you just want some nice (public domain) art to hang on your wall: https://www.usgs.gov/centers/eros/science/earth-art
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Comment #27305221
And here's a USGS site that delineates a watershed from any point on a stream: https://www.usgs.gov/mission-areas/water-resources/science/s...
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Comment #22152218
For context: https://statmodeling.stat.columbia.edu/?s=brian+wansink (he's a Cornell prof with dubious research/PR tactics)
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Comment #21938831
> The report shows that Detroit had 130 total traffic fatalities in 2015 - 46 of those were pedestrian.
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Comment #21798630
This, and the recent megathread about children, made me think of Tom Robbins' B Is For Beer book, it's the natural history of beer, kids version. Rereading it now with the third ki…
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Comment #20685692
USGS Elevation point query service with an API: https://nationalmap.gov/epqs/
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Comment #20562340
In the U.S. it varies widely by state. The USGS has a map of "recent" groundwater levels: https://groundwaterwatch.usgs.gov/default.asp With some obvious large gaps. There are more…