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Alan Richmond

Scientific systems programmer (ex NASA, ESA/ESO, Hubble), web developer, online retailer (retired)

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      • 1988 – 1990 Testimonial from STScI
      • 1985 – 1988 Testimonial from ST-ECF
      • 1991 – 1993 Testimonial from ESRF
      • 1981 – 1987 Testimonial from JET/Max Planck Institute for Plasma Physics
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  • Alan Turing: computable numbers and Turing machines, the Turing test, his Zeta machine and the Riemann Hypothesis, a history timeline
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Recent Posts: Pretty Math Pictures

Multi-pendulum Harmonograph simulator using numpy and matplotlib

Multi-pendulum Harmonograph simulator using numpy and matplotlib

Spectral Harmonographs

Spectral Harmonographs

Harmonograph in Pygame

Harmonograph in Pygame

Stars and Stripes

Stars and Stripes

Rainbow Flag in Pygame

Rainbow Flag in Pygame

Top Posts & Pages

  • A Neural Network in Python, Part 1: sigmoid function, gradient descent & backpropagation
  • Create Your Own Ubuntu-respin Linux Distro
  • Solar System Scope
  • Have we already seen this number? (deja vu again)
  • Popular Sorting Algorithms
  • A Graphical Dice Simulator
  • Merlyn: Computer Control by Speech Recognition
  • Animated Tower of Hanoi
  • A Basic Introduction to HTML
  • Alan Turing on Computable Numbers and Computer Programs
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Tag: sin

A Neural Network in Python, Part 2: activation functions, bias, SGD, etc.

A Neural Network in Python, Part 2: activation functions, bias, SGD, etc.

This is Part 2 of A Neural Network

9 Feb - by Alan - 0 - In Advanced Artificial Intelligence