In the paper two procedures for Directional adjustment of average rankings of two posets: an application to herb layer and moss layer pollution in Baden-Württemberg are disscussed.

Forty refrigerants used in the past, used presently, and some proposed substitutes, were studied in respect to their ozone depletion potential, global warming potential, and atmospheric life times. They were ranked using the Hasse diagram technique, a mathematical method which permits to draw diagrams representing order ...

The topic of pharmaceuticals in the environment is of increasing interest both to the scientific community as well as to the public. Although extensive research is currently under way the availability of data on ecological parameters is largely missing. In our research approach we evaluate the data-availability of 16 ...

With the discussion around REACH the interest in ranking of chemicals is increased. In this paper we take a statistical point of view in evaluation and ranking of chemicals. The data matrix with relevant properties of the chemicals plays the central role. Its evaluation is performed by simple concepts of partial order ...

In the paper an algorithm for calculating the ranking distribution and the averaged ranking probability (averaged rank) of each element of a poset that avoids the enumeration of all linear extensions and relies on the lattice of ideals representation of the poset is presented.