Category: Visualizations Simulations

Laser self mixing and laser feedback interferometry and Fabry-Perot cavity precise position measurements

Thank you for sharing your research. – Richard I try to follow all low cost interferometry methods. I started it because of my interest in gravitational imaging arrays and gravitational wave communication. Joe Weber at Univ Maryland College Park encouraged me to work on that back in the late 1970’s. Beside photon interferometry, there is
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Comment on Can You Modify A Car To Save Fuel?

Can You Modify A Car To Save Fuel? – Fifth Gear https://www.youtube.com/watch?v=39g5D7h7jf8 The weight reduction impact shows up if you start and stop as part of a test. Aerodynamic drag goes as the density of air times the velocity squared. You should have waited for a day identical to the first. You guys are in
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Comment on Quantifying the potential causes of Neanderthal extinction

Axel, Thank you for sharing your paper.  Academia.edu notified me that you had uploaded it.  I read it this morning, then read it again.  I wish your model was in a form that could be shared more easily. I follow groups using the internet.  I am interested in how people approach complex problems, and the
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Answering a question – Is it possible to accelerate neutrons?

Can ever neutrons be directly accelerated by any means of energy ? https://www.researchgate.net/post/Can-Ever-neutrons-be-directly-accelerated-by-any-means-of-energy Riccardo Bernardini This is an interesting article. But search “neutron accelerator” on Google and you get many tens of thousands of entry points. The neutron has a magnetic moment, so is affected by any magnetic gradient. Actually by any energy density gradient
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Comment on exploding wire and electron beam vaporization studies of electric polarizabiltiies

Dynamic dipole polarizability of gold and copper atoms for 532- and 1064-nm wavelengths https://www.researchgate.net/publication/330219250_Dynamic_dipole_polarizability_of_gold_and_copper_atoms_for_532-_and_1064-nm_wavelengths/comments I wrote to Gennady Sarkisov on ResearchGate about your work just now.  I was reading his Jan 2019 paper “Dynamic dipole polarizability of gold and copper atoms for 532- and 1064-nm wavelengths” at https://www.researchgate.net/publication/330219250_Dynamic_dipole_polarizability_of_gold_and_copper_atoms_for_532-_and_1064-nm_wavelengths/comments and left him this comment. ——————–  My
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Comment in Microwave Handy Scanner

https://www.youtube.com/watch?v=vDyo_OQFdAc I doubt that you read comments that come years after you make a video. But I will leave this in case anyone wants to try to improve on this. I think it is a really good idea and there are lots of tools and methods to improve on it. Particularly for humans, but for
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Comment on Electret Mic: How it Works and How to Connect it to a Computer

https://www.youtube.com/watch?v=oqLhvg0I2BU Your microphone link says that particular model is “discontinued”. I use Amazon for convenience and there are several electret microphone items worth seeing at https://www.amazon.com/electret-microphone/s?k=electret+microphone They have the electret microphone elements, but there are also some “electret microphone amplifier” breakout boards that are inexpensive and might work. I ordered some, but have not tried
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Comment on Building a Digital Magnetic Levitation Platform! video

https://www.youtube.com/watch?v=IhG_qHAvJd0 Fairly certain there is not enough information from one magnetic sensor to uniquely determine the position and orientation of the floating magnet. Once you actually measure the position and orientation of the levitated mass, its magnetic field, and the shapes of the supporting field. Then it is much easier. Do you think those rockets
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Comment on Industrial applications of pulsed power technology

https://www.researchgate.net/publication/3340967_Industrial_applications_of_pulsed_power_technology_IEEE_Trans_Dielecrt_Electr_Insul/comments Thanks for gathering this together. But the last decades or so, the cost of high power, high dI/dt controls has dropped considerably – drones, 3D printers, PWM servos, robotics, vehicles. I have only looked at a few areas so far. What you sort of missed was the sensor and control and modeling side. Atmospheric
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Piezoelectric film and fiber, Three Axis, High Sampling Rate Gravimeters for Imaging Arrays

https://hackaday.io/project/164550-low-cost-time-of-flight-gravimeter-arrays/log/203460-piezoelectric-film-and-fiber-three-axis-high-sampling-rate-gravimeters-for-imaging-arrays I have not posted updates here for a while, but I work on this continually.  The latest possible technology that I will be trying to adapt is related to piezoelectric films and piezoelectric fibers.  I have seen several efforts to use piezo disks, but not these films.  As I am reading the history of these materials
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