Comment on plasma cutting video by Jason Michael Saunders, referring to 3D printed rockets

Comment on YouTube Jason, I watched this Genius of 3D Printed Rockets video the other day. They are using plasma discharge heating, but it is not very well controlled at all. They say “it works really precisely”, but it throws off heat and light and bits of wire, and fluctuates a lot. It only needs

Looking for low cost linear arrays of photosensors, maybe contact image sensor arrays

Jean, I want to find a contact image sensor CIS that has high dots per inch, large color depth (bits per pixel color) and fast speed (lines per second). I need three of them, and don’t know where to buy the parts. I just started looking and found that the mobile document scanners (Brother) seem

The Internet is a mess. It encourages duplication, falsification, and excludes more than it includes.

Hi, Ann O’Keeffe. I am titling this “The Internet is a mess. It encourages duplication, falsification, and excludes more than it includes.” In the last 30 years I must have said to myself, a few million times, “Why are there so many topics where people all over the globe work on them, but never ALL

Cream Cheese, Jalapenos and the future of the human species

Cream Cheese, Jalapenos and the future of the human species I am trying to reduce my use of butter, so rather than making toast with butter I used cream cheese today. Since I am curious about the health value of foods as a topic on the Internet, I decided to add diced jalapenos. Then, because

Create arbitrary fields through simulation, measurement, and calibration.

A wave traveling between two parabolic antennas https://www.youtube.com/watch?v=v0cZjOIfwos You might try receiver-transmitter pairs, where each inverts the signal to build a standing wave. Use the final state inside the volume (arbitrary and time dependent if you want) as the constraint, then solve for the signal modifications needed at each site. I first saw this more

Inertial drives need precise and addressable impulse response functions

Two Scientists Are Building a Real Star Trek Impulse Engine https://www.youtube.com/watch?v=0bp8fk5rosI The software defined radios SDRs can transmit as well as receive. Most importantly the software for efficient FFT tracking and display is fairly well developed, so measuring and tracking the impulse response function from microHertz to GigaHertz is not so expensive. A solid, or

Astronomical Societies – Everyone has a right to see and study the sky, without begging or paying

Luis, I think the default should be – if I am looking at my settings – I want to change them.  I had to figure out that I first had to click on “Make Changes to Primary Member Record” (not a confirmation of changes, but getting permission to change it at all), which was after

Thermodynamic Clocks – Time reversible systems, quality, gravitational detectors, solar system coordination

Shawn, Thank you for thinking of me, and sharing. The gravitational energy density (and the usually much smaller magnetic, electric and thermodynamic energy densities) control the rate of chemical, atomic and nuclear events at any location.  The most often used phenomena are “gravitational time dilation”, “relativistic or general relativistic corrections (from velocity and gravity)”.  An

Comment on Viki playback speeds, image controls, and search screens

I have reviewed the use of video playback speeds in various services.  YouTube uses 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0 but it is not sufficient.  I have experimented with speeds from 1/100 to 100x or faster.  Rather than a fixed set of speeds, an intelligent assistant can help. For action movies, they have