The Slide Rule – Part 2

photo: featured_image.jpg Introduction Note: This article  uses Mathjax script. Some script blocking web-browser plugins can prevent the mathematics from been rendered correctly.  DM In the first part we looked at how to make a simple [more…]

The Slide Rule – Part 1

Introduction “Time is a wayward traveller, who sometimes rides posthaste through thick and thin…” From On The Making Of Gardens by Sir George Sitwell For some strange reason that opening sentence, by Sir George, has [more…]

Chaos Theory – Butterflies

On Dec 29th 1972 a paper was submitted to the American Association for the advancement of Science. The author, Edward Lorenz was an MIT professor of meteorology and the subject of the paper was:- Predictability; [more…]

How to work out your interest yourself – and how the banks did it in the old days…

Have you ever wondered how the bank worked out how much interest to pay on your savings account, or charge you on your mortgage? I had a mortgage with a building society some years ago, [more…]

Playing With Light

Science, like a sport, is an art that’s well practised. To lose educates you more than to win instantly. Okay, that’s corny but I’ve found that my project failures have taught me more information and [more…]

Chaos Theory – Population Growth exhibiting odd behaviour

Think for a moment about a field, half filled with rabbits. How can we figure out how many fluffy bunnies we’ll have in a year’s time? Let’s start by agreeing to use a population of [more…]

Chaos Theory – A gentle introduction

Question: Do snails understand mathematics? Ok here’s an idea. Start with the value 0 and 1 and then apply the following rule. Take the last 2 numbers you have and then add them, to make [more…]

Tremors and logs

Fracking is once again in the news, once again you will hear of the dire consequences, the disasters and the earthquakes caused by drilling and fracturing the shale underground. It was suggested that the proposed [more…]

Calculators and Reverse Polish Notation

At the end of September, Doc Mike Finnley posted an interesting article about early pocket calculators that caught my eye (I avoided reading any comments). I enjoyed his construction notes, given many of these older [more…]