Category: Symbolic Mathematics

Comment on Downwind Faster Than the Wind by Veritasium, How Does it Work?

Downwind Faster Than the Wind by Veritasium: How Does it Work? https://www.youtube.com/watch?v=CkhBskovitQ A good quantitative simulation does not need words, and the process of design is more efficient, not maintaining an inaccurate word model alongside the simulation. The words will always be ambiguous, but the model can be calibrated and fit to measurements from the
Read More »

Emoji languages – symbols and communication

Emily, Humans and animals with eyes are pretty good at quickly identifying things seen in the past.  It is a basic survival skill.  “Identify the person”, “Identify the weapon”, “Identify the ripe fruit”. So when training populations for basic survival, you probably have to go back to “Identify and classify quickly” – if you value
Read More »

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
Read More »

Broken Links on PCMDI.LLNL.gov – Global Climate Change Models

Karl, Here are some notes on broken links and bad practices.  I put notes on my search for climate models.  I do these rough searches to get started on a complete review of a topic group on the Internet.  Picking a hard enough problem at global scale is the only way to stay organized and
Read More »

Comments on a video tour of Cern’s Atlas facility

360° tour: ATLAS Experiment – Inside CERN’s largest detector! https://www.youtube.com/watch?v=On1WbLKP8DA Dear Atlas at Cern: There are two purposes for a video like this. One is to simulate what physical visitors do and see if they ever have a chance to visit. You show the parking lot, door, elevator, tunnels, and things. You show things from
Read More »

New Video – Some NOAA Visualizations Data Projections More Gravity Sun Moon Global Cooperation

Some NOAA Visualizations Data Projections More Gravity Sun Moon Global Cooperation https://youtu.be/4waIa-2tMlY My comments and a few suggestions. Then another pitch for global cooperation, and for help with gravimeter arrays to scan the atmosphere, the oceans, the earth interior, the moon, sun and planets and moons. Richard Collins, Director, The Internet Foundation The video refers
Read More »

Notes from Weather.gov survey questions.

Internet Research – global sensor networks and sharing Looking for data to correlate with other sensor networks Your left bars are rich in links. But you are using almost a different style of navigation on every page, certainly every section. With about 3 Million entry points for site:weather.gov that is a lot of hand building
Read More »

Comment on video to measure wavelength of sound and apply reasoning

Waterloo Double Slit 1 at https://www.youtube.com/watch?v=acgb5uP4CBM David, I think it would help viewers if you draw a wave on a transparency and overlay it onto another wave to show what is happening. Put two arbitrary time series and look where they match or do not as the time difference changes. Put a time series made
Read More »

Comment on “Aerodynamic Center and Center of Pressure location. Computation and Misconceptions”

​At https://www.youtube.com/watch?v=67eTLeNwLgE Alexander, You are using what looks like to be a good computer tool for these calculations and visualizations. But you don’t explain your tools and give links to let others know what to use, or what you recommend. I watched your hysteresis video. It is really shaky and hard to watch. You could use
Read More »

Equation Accessibility on ScienceDirect.com, Encouraging Global Collaboration

I like the MathML and equation accessibility of your pages. I am at https://www.sciencedirect.com/topics/engineering/observability right now. But suggest you integrate some tools to immediately use the equations.  You have LOTS of them on your site, and they are disconnected fragments. Collectively they can change the world. And, there is no sense of community on this
Read More »