it all started with a guy taking notes in his engineering class and since he got bored he drew images of different girls on his notes (i think shipon was one of them). then showed them to guys on 2ch. they started calling the guy (who was a regular) that did the drawings as "kiruhi-chan" (from the kirchoff notes). then a guy on 2chan started drawing pics of "kiruhi" in different poses and clothes. it took off from there. the "install" thing are the voltage and current sources from the kirchoff diagrams.