[rffzzbpi] CA with mostly local neighborhood

Consider cellular automata in which a cell's next state depends on both its local neighborhood and a few possible dista

[ezmpildy] Intragalactic versus intergalactic

The distance between galaxies seems not that much greater than the size of galaxies.  Milky Way diameter 100,000 l

[fafakxpb] A4 city blocks

We consider a city street layout of concentric circles and radial spokes.  Far from the center, city blocks are ro

North Korea's Air Force & Airports

NOTE: Scroll to the bottom to download a Google Earth KMZ file of all airfields and heliports.IntroductionThe Korean Pe