Why Division By Zero is Forbidden

In general, mathematics disallows division by zero because the resulting answer is indeterminate. This is because division is not a fundamental operation in mathematics – it is defined as the inverse of multiplication. If we say: 12 ÷ 4 = 3 we mean precisely the same as if we had said: 12 = 3 × […]


Installing Joomla 1.5 Under XAMPP

For instructions on installing Joomla 1.6.x under XAMPP 1.7.3, please see here. This tutorial describes how to install Joomla! versions 1.5.15 through 1.5.23 (skip 1.5.19 because it is broken) under XAMPP version 1.7.3 on Windows XP. XAMPP 1.7.4: Installing Joomla 1.5.22 or 1.5.23 under XAMPP 1.7.4 will FAIL. I haven’t tested all Joomla! 1.5.x versions […]


Adding Adsense to Your Joomla! 1.5 Site

This tutorial shows you how to display Google Adsense ads on your Joomla! website without installing an extension. Requires you have a Google Adsense account. Should work for other ad providers that provide you with a code snippet for ads on your site. Intructions for installing Adsense under Joomla! 1.6 can be found here. Some […]

Web Tools

Installing XAMPP – Apache Server, MySql, and PHP

These instructions are for installing XAMPP 1.7.3 on Windows XP, Service Pack 3. It should work for other configurations as well. XAMPP 1.7.4 (released in January 2011). I had no problem with the install and most things work just fine, however, there are many little things that require “expert” tinkering to get it working right. […]


Proofreading Tricks and Tips

The best way to proofread your work is to get someone else to do it. Unfortunately, this is not always possible. The following proofreading techniques are easy and help minimize errors in your documents. Use a spell checker and grammar checker, but DON’T trust them. Spell checkers catch obviously misspelled words (like byt instead of […]