The use of computers in simulating real-world situations has received widespread interest and attention. Computer simulations have widely been used in industrial applications, fundamental research and in computer-aided education and visualization. In this book, the authors present current research in the study of the technology, applications and effects on learning of computer simulations. Topics include computer modeling of rearrangement in liquid phase sintering; generating near-field fresnel diffraction patterns by Iterative Fresnel Integrals Method; computer simulation of the ion beam modification and analysis of single crystal surfaces under grazing incidence conditions; computer simulation of carbon and carbon-metal nanostructures; computation of residue curves using Mathematica and MATLAB; educational computer simulations of lightning and associated thunders; and designing energy efficient buildings using computer simulation.