Advances in Electronics and Electron Physics, Vol. 86

This series covers a wide range of topics, stretching from the particle optics of accelerators, mass spectrometers, electron and ion microscopes, and of individual components of these instruments to theoretical and practical aspects of modern electroinics. Another broad intterest is digital image processing and pattern recognition, including the devices employed and the methods developed. Electron physics is interpreted very liberally and articles are often included on materials of current interest as well as on the devices that employ them. The object of the series is to provide articles that may review a new or rapidly developing field, or may cover many years of research, thus providing a small monograph on a specific subject. "Advances in Electronics and Electron Physics" Volume 86 features articles on the following topics: GaAs semiconductor memories; image processing; N-beam calculators; and electron optics.