As application systems live longer and grow in size and complexity, there is an ever increasing need for methodologies, models and tools that can aid software builders in developing maintainable, correct and consistent ...

© 1992 Acta Chemica Scandinavica

© Cambridge Philosophical Society 1993

The recession curve provides important information about the low flow behaviour of rivers, and tells in a general way about the natural water storages feeding the stream. This work has, however, found a high time variability ...

We make some observations concerning the set C*n of real nonnegative, symmetric and diagonally dominant matrices of order n. This set is a convex cone and we determine its extreme rays. From this we derive different results, ...