Category: Schools, Universities, Learning and Working

Comment on The 49 dollar, 500 WattHour eBike Battery video

https://www.youtube.com/watch?v=0FwA_s9Ovxc You talk about motivations for watching and DIY at about minute 14. The reason I am watching is I have a lifetime of learning how things work, what they can do, and how to put them into different combinations. Often the off-the-shelf parts don’t fit, or are overkill or too expensive. Mostly they just
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Comment on Video about laser interferometer design and use – replace superconducting gravimeters

Counting Atoms with the Doppler Effect – Heterodyne Interferometer by Sam Zeloof at http://sam.zeloof.xyz https://www.youtube.com/watch?v=vPu6lN9yJOY Sam, I sent you an email about using this to replace the network of superconducting gravimeters with something more people can afford. You have several orders of magnitude available to you by very small adjustments. SGs cost several hundred thousand and
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Plans for measuring the speed of gravity again, using superconducting gravimeter and related sensor networks

One linear regression is all that is needed to useg JPL Ephemeris to separate the sun moon from earth-based signals I want to repeat the SG network speed of gravity measurement I did in 2003 using all the current stations. I will also use the best of the broadband seismometers from IRIS.edu. Any absolute measurements,
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Balloon Videos, Allsky and HalfSky Cameras on the Internet

UFOs Unexpected Flying Objects on a Peaceful Morning – https://www.youtube.com/watch?v=cCmkCsNVzEI I am reviewing live videos on the Internet, but seldom have time to just enjoy them. I made a second video of the balloons, but tried to add a magnifier to the video to show them larger. I want to add many tools to make
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Comment on Figma video – make your own interactive global forum, let everyone use it for free

How we Jam: FigJam for Designers at https://www.youtube.com/watch?v=KoCRiAWNEYI You took an interactive and collaborative environment and transferred it to a one way only, no feedback format when you put this on YouTube. You should have Figma be able to talk to the whole Internet (about 4.8 billion with some access) and then listen and let
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Estimate Direction of a live webcam from position of the moon at known time

I was looking at https://www.youtube.com/watch?v=9k_sg8rhsgk which is on the roof of the Lake Superior Maritime Visitor Center in Duluth, Minnesota at about 11:30 pm.  The moon was shining brightly on the water. From Google maps I found the satellite view, a rough idea of where the camera was pointing, and the latitude and longitude in
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Comment on Peters Seismological Observatory video

https://www.youtube.com/watch?v=ZayEvWsNu6I Seismology Research Centre My Comments: I searched for “Peters Seismological Observatory” and found it is listed as DU.TPSO (network.station) in IRIS.edu. The profile for DU.TPSO is at http://ds.iris.edu/mda/DU/TPSO/ where the instruments are explained. Unfortunately, only the STS-2 is listed and only the HHE, HHN and HHZ 100 samples per second three axis seismic data
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Calibrating and documenting all images and videos on the Internet – Half Sky and All Sky Cameras

Facebook AllSky group – https://www.facebook.com/groups/172438633343696 I have found thousands of live web cameras on the Internet. Here is one that has stars often – https://www.youtube.com/watch?v=mb2ZzwShJog I saved a screen print of the whole page when found good stars. Then I opened that in an image viewer and clipped the sky. I went to https://nova.astrometry.net/upload and
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Comment on Chain Fountain videos

Chain Fountain 2 – Drill powered spool https://www.youtube.com/watch?v=bcsb1xAv7XA When the beads are in a jar, they have a vertical component of velocity to go up and over the rim, so the beads trajectory follows gravity. Since stress travels through the beads much faster than the beads themselves, the force of the faster beads in the
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Comment on a Prayer for Afghanistan on Facebook

Peggy Browder Collins, Cristine Phillipps Arnold, Melanie Smith Krenek⁠ ⁠ When my Mom was still living, she prayed constantly. She taught us to care about every person. When I was growing up, there were whole communities of people praying constantly. ⁠ Now Cristine’s prayers are organized and focused on specific issues. I can see her
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