Complete nonlinear differential-algebraic equation (DAE) sub-system models are considered in the paper when designing controllers of components in power systems. First-principle models are nonlinear DAE sub-system models, but they use non-local measurable variables to describe the mutual relation (interconnection) between component and the AC grid, and thus they are not suitable for designing d...

It is difficult to reach to an agreement on how to measure software quality. It has been argued that one of the reasons for this is that quality is a complex concept, for which a universal definition does not exist. Quality means different things to different people, thus it is highly subjective and context-dependant. In [12] Kitchenham stated that quality is “hard to define, impossible to meas...

The creation of models of nature is the main objective of natural sciences. Without abstraction, however, models would be as complicated as reality itself; they would mimic nature without helping us to understand it. Identifying the essential features of the phenomena being described is therefore a crucial element of model construction. Unfortunately, an emphasis on objective, measurable charac...

The study of diffusion in macromolecular solutions is important in many biomedical applications such as separations, drug delivery, and cell encapsulation, and key for many biological processes such as protein assembly and interstitial transport. Not surprisingly, multiple models for the a-priori prediction of diffusion in macromolecular environments have been proposed. However, most models inc...