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jubjubbird

HN member
Joined
Sun, Jul 26, 2015, 2:42 AM UTC
HN karma
192
Public activity
31 items

About jubjubbird

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Recent public activity

  1. comment
    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…

  6. comment
    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 …

  11. comment
    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 …

  12. comment
    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…

  15. comment
    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

  16. comment
    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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  20. comment
    Comment #22152218

    For context: https://statmodeling.stat.columbia.edu/?s=brian+wansink (he's a Cornell prof with dubious research/PR tactics)

  21. comment
    Comment #21938831

    > The report shows that Detroit had 130 total traffic fatalities in 2015 - 46 of those were pedestrian.

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  23. comment
    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…

  24. comment
    Comment #20685692

    USGS Elevation point query service with an API: https://nationalmap.gov/epqs/

  25. comment
    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…