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A single star orbiting the black hole in the center of the Milky Way Jul 2018

  • khoitsma
  • General
  • 0 Comments

In a paper published July 26, 2018 in Astronomy & Astrophysics, a team of researchers reports the observation of a hallmark of general relativity known as gravitational redshift. The measurement is the first time general relativity has been confirmed in the region near a supermassive black hole.

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Photomath Jun 2018

  • khoitsma
  • Concept, General, Software
  • 0 Comments

Take a photo of a handwritten math problem and get the answer from your smartphone https://photomath.net/en/  

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Pythonista 3 has an excellent UI development platform! May 2018

  • khoitsma
  • AISC, iPad_iPhone, Python, Pythonista, Video
  • 0 Comments

All of the AISC structural shapes at your fingertips The user may filter shapes by nominal type and by nominal size This is a standalone app built using Pythonista 3. Less than 500 lines of user programming (my programming) Data is contained in a CSV file of a couple thousand lines Visual drag and drop GUI builder – very nice […]

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ASCE 7-16 Ice Loading Apr 2018

  • khoitsma
  • AISC, ASCE, Excel, Python, PyXLL
  • 0 Comments

Although ice loading is written as a simple formula, the formula varies with structural geometry (W, T, C, etc). I haven’t seen it automated in software.

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The Coming Software Apocalypse Apr 2018

  • khoitsma
  • Software
  • 0 Comments

Good article.

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The Scientific Paper — Is It Obsolete? Apr 2018

  • khoitsma
  • Software
  • 0 Comments

The scientific paper is obsolete. @jsomers predicts what will take its place

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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
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