Über endlich erzeugte Fittingklassen

Ohne Zusammenfassung     

Environmental data modeling

In the statistical analysis of environmental data, space and time are often disregarded by the use of classical methods such as hydrological analysis of frequencies or factor analysis. But these methods, based on the assumptions of independent identically distributed observations, cannot be efficient. This article discusses more appropriate approaches regarding the space and time influences, and surveys some important proposals of modeling environmental data. Three examples show the workability of the presented theory. Within the first example, a system to detect abnormal occurrences in water quality as early as possible depending in quasi-continuous data is developed. A second example decomposes a water quality time series into three unobservable components. Finally, it is shown how the factor model can be extended to time series data.     

Polynome zwischen Gitterpunkten

Ohne Zusammenfassung     

Über zwei Randwertaufgaben für nichtlineare Differentialgleichungssysteme

Ohne ZusammenfassungHerrnErich Kamke zum 70. Geburtstag am 18. August 1960 gewidmet     

Threshold voltage shift ofp-channel MOS-transistors by implantation of donors

If the number of electrically activated donors after implantation and annealing is (10 min at 500° C) determined by Hall-measurements and if these values are used to compute the threshold voltage shift of P⁺ and As⁺-implantedp-channel MOS-transistors, calculation and experiment do not agree. The difference can be explained by considering that deep levels are created by ion implantation.     

Projektive Moduln über polynomialen Erweiterungen von Potenzreihenalgebren

Ohne Zusammenfassung     

Surface microstructure/miniature mass spectrometer:.processing and applications

3 . Its fabrication is based on techniques used in microsystem processing and in particular anisotropic etching, thin film deposition, electroplating, and anodic bonding. The mass spectrometer consists of a plasma electron source for measurand ionisation as well as an ion optic and a mass separator specifically designed for the system’s small dimensions. Received: 27 February 1998/Accepted: 11 March 1998