The paper presents a method which allows to eliminate the y' (Cu, Ni),AI phase of discontinuous transition occurring during ageing of CuNilOAI3 alloy. Introduction of additions such as Si or Ti in the amount of some tenths of percent into CuNi I 0Al3 alloy causes that y' phase of the discontinuous transition is not precipitated. CuNilOAI3 alloy, free from the Iamellar y' precipitates, formed in the discontinuous transition, attains very high strength properties and good deformability.

The article shows the results of simulation studies conducted on metal matrix composites applying the method of the dynamics of molecular particles. The described method has been illustrated with numerical examples of the simulation and verified by experiments. The numerical computations have been made on supercomputers available at the Academic Computer Centre in Kraków, while experimental studies were conducted by the Foundry Research Institute in Kraków.

The article presents the practical use of biological and hydrological processes (eco-hydrology) for improving the quality of water in the ponds of the Julianowski Park. It also presents an effective method of zoning the park area for new investments.