The thesis is about expanding graphs and is written as an introduction to expanding graphs for Bachelor students. The thesis is available in PDF and in DVI format.
In the thesis is reference to a program to make an estimate on the so-called Cheeger constant. To run this program you need the Java Runtime Environment (>= 1.4.2_04). You can download the program along with the source here (GPG). In the zip file also is included some documentation about the program.