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Truss Calculations — A Puzzle Oct 2026

  • khoitsma
  • editor's pick, Engineering
  • 0 Comments

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Truss Calculations Sep 2026

  • khoitsma
  • editor's pick, Engineering, Excel, Plotly, Python
  • 0 Comments

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Back of the Envelope using Graph Paper Sep 2026

  • khoitsma
  • Concept, editor's pick, General
  • 0 Comments

Back of the Envelope using Graph Paper

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Short Takes

  • khoitsma
  • General, List, Personal
  • 0 Comments

How Fairphone built the ethical, repairable Fairphone Gen 6+

Short Takes was last updated on September 7, 2026

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Not Quite Uniform Loadings Aug 2026

  • khoitsma
  • Calculus, editor's pick, Engineering, Mathematics
  • 0 Comments

Maybe uniform loadings are too ideal

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p5 test Jul 2026

  • khoitsma
  • JS
  • 0 Comments

Toggle popover No JavaScript, just modern browser magic, thanks to the wonderful folks speccing for the web and building our browsers!

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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 (only good on a real desktop)
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

Recent Posts

  • Truss Calculations — A Puzzle Oct 2026
  • Truss Calculations Sep 2026
  • Back of the Envelope using Graph Paper Sep 2026
  • Short Takes
  • Not Quite Uniform Loadings Aug 2026
  • p5 test Jul 2026
  • Divisibility July 2026
  • Narlin Beaty’s Polyominos June 2026
  • Protected: Custom iPhone Shortcuts May 2026
  • Marion Walter’s Theorem May 2026
  • Derive the Stiffness Matrix for a Beam Apr 2026

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