The main purpose of the SASSYS code is to analyze the consequences of failures in the shutdown heat removal system of a liquid metal cooled fast breeder reactor. The code is also capable of analyzing a wide range of transients, from mild operational transients through severe hypothetical core...

A pH-process difficult to control was constructed for testing different kinds of pH- control algorithms. The process was modelled applying basic physico-chemical laws. The overall pH-model comprised a linear mixing model of concentrations and an implicit state-linear output model describing the...

The objective pursued in water quality management is to secure water qualities such that marginal cost of the cleaning water equals the accuring marginal benefits. It is the purpose of this paper to show how the methods of system analysis may be used to plan more economical new pollution control...

It is well known that obstructions in two fluid flow have the effect of homogenizing the two fluid mixture, resulting not only in a more uniform phase distribution, but also in a significant reduction of the ratio of fluid velocities. This paper shows that these effects can be modelled using a...

Diagnosis of many neural disorders requires a good understanding of the skeletal muscle activity (SMA). A new mathematical formulation is developed in this context, which leads to a general computer-aided identification procedure, based on input-output observations. The methodology uses Wiener's...

Good results have been obtained using the Random Choice Method (RCM) in the computation of reacting gas flow problems. The RCM is an unfamiliar method and difficult to program. The question arises as to whether a simpler difference approximation can obtain as effective results with less...

A method is given for sampling the outcome population size of a birth and death process running over a specific duration of time for an arbitrary starting population size. This is done by treating two cases depending on the size of the starting population. If the starting population size is...