The paper presents design of a wavemaker system and it’ s use in tests on the Split harbor physical model. The main purpose of testing is to define the appropriate size, type and position of docs, piers, and other coastal facilities which are scheduled to be built in a few years. The system was built for the purpose of testing the sea waves impact on coastal facilities. It is suitable for long-crested two-dimensional irregular sea waves generation. The structure of the wavemaker is described, as well as user control interface and principles of operation. The model of Split harbor with main structures is presented. Finally, testing process is described, with current results displayed.

The aim of this paper is the determination of air pollution influence on the percentage of stomata in tested woody species, horse chestnut and birch, under examined Banja Luka air pollution conditions. Two locations in Banja Luka town were examined, with different air pollution degrees: the first location is a hostel for students, with the minimal or absent air pollution; the second location is the west transit, with high air pollution due to a high number of motor cars which pass by the west transit. The air pollution difference between these two locations is very marked, and the objective of the examination was to assess how the indicated locations, which have different life conditions for the tested woody species, impact the physiological processes such as transpiration and photosynthesis. The study species react differently when the percentage of stomata and air pollution are compared.