XerxesZorgon

## redflag.jl
#=
Solves a geometry problem using linear algebra and Heron's formula
See: Red Flag Day Geometry

using Revise
Load with: includet("redflag.jl")

=#

using LinearAlgebra

## pi_license.gp
/*
The PI License

Finds a four digit prime number n such that n is
	- Balanced: A prime equidistant from the previous and subsequent prime numbers.
	- Odious: A number is odious if the binary representation of the number as an odd number of 1's, and is evil if the number of 1's is even.
	- Happy: Add the squares of the digits to get a new number. Continue the process and if you ever get to $1$, the original number is happy.
	- Apocalyptic: If 2^n contains the sequence 666, then n is apocalyptic.

Author: John Peach

## shock_tube.geo
// Gmsh project created on Mon Jun 17, 2024
SetFactory("OpenCASCADE");

// Define points
L = 0.5;    // Tube length
H = 0.05;   // Tube width
N = 10;     // Number of rectangles along length of the tube
Point(1) = {0, 0, 0, 1.0};
Point(2) = {L, 0, 0, 1.0};
Point(3) = {L, H, 0, 1.0};

## CSG_example.scad
// Shape parameters
sphereRadius = 0.65;
cylinderRadius = 0.3;
cylinderHeight = 1.1;

// Top level difference operation
difference(){

    // Intersection of cube and sphere
    intersection(){

## goldfish-conjecture.ipynb

      
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                / goldfish-conjecture.ipynb
            
            
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              June 5, 2024 01:31
            
              
                Calculations for the Student's t-test using Python in a JupyterLab notebook
              
          
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## stefan-boltzmann-revisited.ipynb

      
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                / stefan-boltzmann-revisited.ipynb
            
            
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              May 28, 2024 19:17
            
              
                Earth temperature from the Stefan-Boltzmann Law
              
          
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## Fibonacci.html
<!DOCTYPE html>
<html>
<head>
<meta name=viewport content="width=device-width,initial-scale=1">
<meta charset="utf-8"/>
<script src="https://cdn.geogebra.org/apps/deployggb.js"></script>

</head>
<body>
<div id="ggbApplet"></div>

## Bretscher_sequence.ipynb

      
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                / Bretscher_sequence.ipynb
            
            
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              February 2, 2024 19:24
            
              
                Spectral decomposition of 2x2 matrix defining recursive sequence, in Mathematica
              
          
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## Problem2024.ipynb

      
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              February 2, 2024 19:23
            
              
                Spectral decomposition of 2x2 matrix defining recursive sequence, in Julia
              
          
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## Attack rate.csv

          
            x
            logx
            Hr
            Fit

            
              0.000222026
              -3.653596397
              0.356389604
              -0.125

            
              0.000279034
              -3.55434296
              0.356389604
              -0.125

            
              0.00035068
              -3.455089522
              0.37470064
              0

            
              0.000440721
              -3.355836085
              0.37470064
              0

            
              0.000553882
              -3.256582648
              0.502877892
              0.125

            
              0.000696099
              -3.157329211
              0.557811
              0.125

            
              0.000874831
              -3.058075774
              0.637158823
              0.25

            
              0.001099456
              -2.958822336
              0.692091931
              0.375

            
              0.001381755
              -2.859568899
              0.917928042
              0.5
	#=
	Solves a geometry problem using linear algebra and Heron's formula
	See: Red Flag Day Geometry

	using Revise
	Load with: includet("redflag.jl")

	=#

	using LinearAlgebra
	/*
	The PI License

	Finds a four digit prime number n such that n is
	- Balanced: A prime equidistant from the previous and subsequent prime numbers.
	- Odious: A number is odious if the binary representation of the number as an odd number of 1's, and is evil if the number of 1's is even.
	- Happy: Add the squares of the digits to get a new number. Continue the process and if you ever get to $1$, the original number is happy.
	- Apocalyptic: If 2^n contains the sequence 666, then n is apocalyptic.

	Author: John Peach
	// Gmsh project created on Mon Jun 17, 2024
	SetFactory("OpenCASCADE");

	// Define points
	L = 0.5; // Tube length
	H = 0.05; // Tube width
	N = 10; // Number of rectangles along length of the tube
	Point(1) = {0, 0, 0, 1.0};
	Point(2) = {L, 0, 0, 1.0};
	Point(3) = {L, H, 0, 1.0};
	// Shape parameters
	sphereRadius = 0.65;
	cylinderRadius = 0.3;
	cylinderHeight = 1.1;

	// Top level difference operation
	difference(){

	// Intersection of cube and sphere
	intersection(){
	<!DOCTYPE html>
	<html>
	<head>
	<meta name=viewport content="width=device-width,initial-scale=1">
	<meta charset="utf-8"/>
	<script src="https://cdn.geogebra.org/apps/deployggb.js"></script>

	</head>
	<body>
	<div id="ggbApplet"></div>
x	logx	Hr	Fit
0.000222026	-3.653596397	0.356389604	-0.125
0.000279034	-3.55434296	0.356389604	-0.125
0.00035068	-3.455089522	0.37470064	0
0.000440721	-3.355836085	0.37470064	0
0.000553882	-3.256582648	0.502877892	0.125
0.000696099	-3.157329211	0.557811	0.125
0.000874831	-3.058075774	0.637158823	0.25
0.001099456	-2.958822336	0.692091931	0.375
0.001381755	-2.859568899	0.917928042	0.5