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Author: khoitsma

Structural engineer, Python programmer

Antibiotic Resistance Jun 2022

  • khoitsma
  • General, Science
  • 0 Comments

No antibiotics worked, so this woman turned to a natural enemy of bacteria to save her husband’s life

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Tabular List — Blog Entry Search

  • khoitsma
  • Blog Navigation, General
  • 0 Comments

Navigate the blog

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AISC bolt holes Aug 2022

  • khoitsma
  • AISC, Python, Steel Detail
  • 0 Comments

This code illustrates the readability of Python.

Compare reading the text of AISC 15th Edition Manual, Section J3 to the program statements.

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Learn Julia / Learn Calculus Aug 2022

  • khoitsma
  • Calculus, Julia, Mathematics
  • 0 Comments

Calculus with Julia by John Verzani

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Two Point Lift with Rotation Aug 2022

  • khoitsma
  • Engineering, Excel
  • 0 Comments

Two point lifts with rotation sometimes defy simple intuition.
I present several features in my Excel spreadsheet.


Lift Sequence from horizontal to vertical

 

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Silver Bridge Disaster

  • khoitsma
  • Engineering
  • 0 Comments

Design lessons from a 1967 bridge failure

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Posts navigation

Older posts
Newer posts

Recent Posts

  • The Triangle of Minimum Perimeter Nov 2025
  • NotebookLM Cather Oct 2025
  • Minimal Footprint Dropdowns in Excel Oct 2025
  • Bow Out Aug 2025
  • Automated Foundation Rebar Drawing Aug 2025
  • Close Encounters in Batting Averages July 2025
  • 2D Engineering Interpolation Jun 2025
  • Lessons Learned (structural engineering) Apr 2025
  • Marimo Notebook Mar 2025
  • Fixed Fixed Beam with a Moment at any Point — Superposition Mar 2025
  • NotebookLM Feb 2025

Archives

QuickLinks


Instant Access to all Posts
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

Hacker News (from YCombinator)
Diaorifa
  • Home
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Pentagonal number visual proof

Dice Distribution (bar)

Bayes theorem visual proof

Bayes icon