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Thank You May 2019

  • khoitsma
  • Personal
  • 0 Comments

nana bear

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Earth Day XLIX Apr 2019

  • khoitsma
  • General
  • 0 Comments

Celebrate!

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Steel Tee Support Design Mar 2019

  • khoitsma
  • Petrochemical Design
  • 0 Comments

Let’s just start with a basic design: the tee is 8′ tall bottom of base plate to top of steel beam the tee beam is 4′ wide the steel column and beam are W8x31 (A992) This size tee is one of the most sturdy that we will design. any shorter and we would have used […]

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Three Blue One Brown Feb 2019

  • khoitsma
  • Concept, Mathematics
  • 0 Comments

The craft and artistry are as impressive as the mathematical concepts.

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This Day in Computer History Jan 2019

  • khoitsma
  • General
  • 0 Comments

https://www.computerhistory.org/tdih/

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Raspberry Pi with Sunfounder Sensor Kit Dec 2018

  • khoitsma
  • Hardware, Kids (middle school and up), Python, Raspberry Pi 3 Plus, Sunfounder Sensor Kit, Video
  • 0 Comments

The video shows the LCD Display connected to the Raspberry Pi. Easy setup Easy programming

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  • Close Encounters in Batting Averages July 2025
  • 2D Engineering Interpolation Jun 2025
  • The Bookshelf May 2025
  • Lessons Learned (structural engineering) Apr 2025
  • Marimo Notebook Mar 2025

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Short Takes
My Dash apps

My GeoGebra app
What is the most general equation for the area of a triangle?
The Wait calculation
The incessant obsolescence postulate (IOP)
Barnard’s Star and the 'Wait Equation'
IOP counterargument
The amazing arbelos
Surprises found in the arbelos (1954)
Arbelos from Wolfram MathWorld
Circle Theorems
• Circle Theorems Marked
• Circle Theorems — Practice
Two Semicircles
Japanese temple geometry
★ Sister Celine — a beautiful life
★ John Lienhard IV on Ingenuity
★ Charles Stutzenbaker, Field Biologist
Neal Stephenson on the OS
A few quotations

Tyler TX weather • 🌡 Steve Fitzgerald
Tyler TX weather • 3-day history
Tyler TX weather • calendar month
Tyler TX weather • graph month
East Texas weather • TAMU
★ All of the water in the world

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Diaorifa
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Pentagonal number visual proof

Bayes theorem visual proof

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