Mathematics

Understanding Trigonometric Functions using the Unit Circle (Advanced)

While I call this advanced, it does not mean harder or more complicated, it just means more abstract. Understanding the trigonometric functions (sine, cosine, tangent) using right angle triangles is simply a special case of trigonometric functions using the unit circle. I strongly recommend first reading and understanding the article Understanding Sine, Cosine, and Tangent […]

Blog

The UG802 a New Entry in the Ultra Low Cost, Ultraportable Computer War

It seems that hardly a week goes by these past few months without some announcement of a new ultra low cost (usually USB stick sized) computer. This flurry of activity was kicked off by the Raspberry Pi (a $35 bare bones, exposed circuit board, hobbyist computer featuring a 700MHz ARM CPU, 256MB of RAM). I […]

Blog

Raspberry Pi and the MK802 a Side-by-Side Comparison

All information and links presented were considered accurate as of 02-August-2012. All links to external sites were deemed safe and relevant at the time this article was written. If they cease being valid or safe, please let me know. The Raspberry Pi and MK802 are sub US$100 computers. Raspberry Pi This was the first sub […]

VirtualBox

How to Access USB Devices

These instructions are for VirtualBox 4.1.18 running on Windows 7 with Service Pack 1 with Ubuntu 12.04 (running the Unity Interface) as the guest OS. I believe the instructions are the same (or very similar) regardless of which host OS and guest OS combination you are running, but I make no guarantee. Sometimes you want […]

Ubuntu 12.04

How to Completely Uninstall / Remove GNOME Shell

These instructions are for Ubuntu 12.04 running the Unity desktop on which GNOME Shell was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When GNOME Shell is installed in Ubuntu 12.04, it installs […]

Ubuntu 12.04

How to Completely Uninstall / Remove GNOME

These instructions are for Ubuntu 12.04 running the Unity desktop on which GNOME was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When GNOME is installed in Ubuntu 12.04, it installs several packages […]

Ubuntu 12.04

How to Completely Uninstall / Remove gnome-session-fallback

These instructions are for Ubuntu 12.04 running the Unity desktop on which gnome-session-fallback was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When gnome-session-fallback is installed in Ubuntu 12.04, it installs several packages […]

Ubuntu 12.04

How to Completely Uninstall / Remove kde-plasma-desktop

These instructions are for Ubuntu 12.04 running the Unity desktop on which kde-plasma-desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When kde-plasma-desktop is installed in Ubuntu 12.04, it installs several packages […]

Ubuntu 12.04

How to Completely Uninstall / Remove the Kubuntu Desktop

These instructions are for Ubuntu 12.04 running the Unity desktop on which the Kubuntu Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Kubuntu Desktop is installed in Ubuntu 12.04, […]

Ubuntu 12.04

How to Completely Uninstall / Remove Xubuntu Desktop

These instructions are for Ubuntu 12.04 running the Unity desktop on which the Xubuntu Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Xubuntu Desktop is installed in Ubuntu 12.04, […]

Ubuntu 12.04

How to Completely Uninstall / Remove Lubuntu Desktop

These instructions are for Ubuntu 12.04 running the Unity desktop on which the Lubuntu Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Lubuntu Desktop is installed in Ubuntu 12.04, […]

Ubuntu 12.04

How to Completely Uninstall / Remove Xfce

These instructions are for Ubuntu 12.04 running the Unity desktop on which the xfce4 window manager was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Xfce window manager is installed in […]