Computer - The Drafting Table (Page 2)

The Drafting Table

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Computer

A collection of 32 posts

7 Excel Functions and Features to Know

In this post, I thought I'd share some tools and features in Microsoft Excel that I've come across over the years. This post is not intended as a comprehensive tutorial on any of these features; rather, it can be a starting point for learning more about

Hilbert Curve

One of my favourite topics in math is fractals. For this post, I drew the Hilbert Curve fractal in octave. The Hilbert Curve [http://en.wikipedia.org/wiki/Hilbert_curve] is a space-filling curve: although it is one-dimensional (a series of line segments) itself, it covers a two-dimensional area. I

ASM1 in Octave

This post contains an implementation of the IWA [http://www.iwahq.org/]'s Activated Sludge Model No. 1 (ASM1) in octave. Models are a widely-used tool in the design and operation of wastewater treatment systems. For my job, I use a commercial simulator [http://envirosim.com/], but I thought

A Demotivational Poster for May Day

Today is May 1st, and I made a "demotivational"-style poster for the occasion. The LaTeX code (see below) can be easily modified for other posters of this style. % "Demotivational" poster template in LaTeX \documentclass[12 pt,portrait]{article} \usepackage{fullpage} \usepackage{url} \usepackage[pdftex]{graphicx}

Timing of River Ice Formation and Break-Up in New Brunswick

Half a dozen years ago, I did a summer work term for Hydro-Com Technologies [http://www.rvanderson.com/index.php/fredericton-nb]. I had a good experience there and learned a lot. One project I was involved in while I was there was an analysis in trends in rivers in New

Writing an .stl file from scratch

The .stl file format [http://www.ennex.com/~fabbers/StL.asp] (see also [http://en.wikipedia.org/wiki/STL_%28file_format%29]) is used for 3D printing and similar fabrication technologies. The files are normally created as output from design software, but I wanted to try writing one by hand

Chaos Game Sierpinski Triangle

The following figure is a representation of the fractal known as the Sierpinski Triangle. It was drawn using the chaos game [http://en.wikipedia.org/wiki/Chaos_game] technique with 100,000 iterations. The way this technique works is: 1. A random starting point is chosen; 2. The next point