Guide: Launching EmulationStation/RetroPie from within Kodi on Raspbian (The XBone, part 2)

So you've got your Raspberry Pi to display a glorious ‘XBone’ splash screen, but what kind of bone would it be if it couldn't play games? Kodi looks kind of like a console UI, and with RetroPie, we can launch games, but how… »

Guide: A custom splash screen on the Raspberry Pi, for Raspbian Jessie (The XBone, part 1)

There are many guides on the internet for creating a custom splash screen on Linux, but most for Raspbian are based on SysV init, and don't interface well with systemd, which is now used by Raspbian. Those that do support systemd make use of Plymouth… »

GUIDE: Convert SWFs to PDFs, preserving text as text, with gfx2gfx-pdftext

Introducing gfx2gfx-pdftext, a fork of gfx2gfx designed to convert SWF files to PDF files, while preserving text! I am not aware of any other freely-available tools that can do this.

The original gfx2gfx from SWFTools unfortunately converts text to paths. An improvement on… »

US Election 2016: What if the Electoral College was proportional?

The title says it all really. What would have happened in the 2016 American federal election if votes in the Electoral College were allocated proportionally, either within each state or nationwide? I was curious, so here's some number-crunching.

IB Physics Imaging option: Magnification of optical instruments

Take note of sign conventions!

Magnifying glasses

A single convex lens can be used as a magnifying glass.

If an object \(O\) is placed within the focal point \(F\) of a convex lens, a virtual image \(I\) will be formed.

The linear magnification \(m\) of… »