overlay measurement
41CryoSat — is an ESA programme which will monitor variations in the extent and thickness of polar ice through use of a satellite in low Earth orbit. The information provided about the behaviour of coastal glaciers that drain thinning ice sheets will be key… …
42Augmentative and alternative communication — An AAC user indicates a series of numbers on an eye gaze communication board in order to convey a word. Augmentative an …
43X-ray lithography — is a next generation lithography that has been developed for the semiconductor industryref|vlad. Batches of microprocessors have already been produced. The short wavelengths of 0.8 nm X rays overcome diffraction limits in the resolution of… …
44Atmospheric dispersion modeling — Industrial air pollution source Atmospheric dispersion modeling is the mathematical simulation of how air pollutants disperse in the ambient atmosphere. It is performed with computer programs that solve the mathematical equations and algorithms… …
45Molecular graphics — (MG) is the discipline and philosophy of studying molecules and their properties through graphical representation.[1] IUPAC limits the definition to representations on a graphical display device .[2] Ever since Dalton s atoms and Kekulé s benzene …
46Charles E. Smith (engineer) — Dr. Charles E. Smith was professor and Chair in the Department of Electrical Engineering at the University of Mississippi. His focus research areas included: application of electromagnetic theory to microwave circuits, application of numerical… …
47GNSS Augmentation — Augmentation of a Global Navigation Satellite System (GNSS) is a method of improving the navigation system s attributes, such as accuracy, reliability, and availability, through the integration of external information into the calculation process …
48SelTrac — is a digital signalling technology used to control the movements of rail vehicles originally developed by Alcatel. SelTrac is now sold by Thales. SelTrac Communications Based Train Control (CBTC) technology SelTrac is a family of three different… …
49Hemispherical photography — Hemispherical photography, also known as fisheye or canopy photography, is a technique to estimate solar radiation and characterize plant canopy geometry using photographs taken looking upward through an extreme wide angle lens (Rich 1990).… …
50PIMEX — is one of the so called video exposure monitoring methods, which are used in occupational hygiene practise since its inception in the mid 1980s (1). The name PIMEX is an acronym from the words PIcture Mix EXposure, and implies that the method is… …
