Air pollution represents one of the most complex problems of humanity. Traffic contributes significantly to this by emitting large amounts of harmful gases. This problem is particularly pronounced at urban intersections due to frequent changes in vehicle movement dynamics. This paper primarily presents the influence of intersection geometry on pollutant emissions levels. In addition, the influence of various traffic policies promoting greater use of public transport and zero-emission vehicles is also examined. The research combines the field part of recording existing intersections in Sarajevo, Bosnia and Herzegovina with traffic microsimulation. Detailed data on vehicles’ movements were obtained by advanced video processing using the DataFromSky tool, while the PTV Vissim 2022 and Bosch ESTM (2022) software were used to simulate traffic and estimate emissions at geometrically different intersections. The results showed that, in saturated traffic conditions, signalized intersections cause up to 50% lower emissions compared with two-lane and turbo roundabouts and that the impact of the geometric change is more significant than the impact of zero-emission vehicles. In unsaturated conditions, the differences in emissions at different intersections are negligible, with the highest reductions in pollution achieved by using zero-emission vehicles.

Partially crystalline metallic glass Fe38Ni36B18Si8 was produced by rapidly solidifying in the form of ribbon. Chemical composition and homogeneity of the sample were determined using Scanning Electron Microscopy, equipped with energy-dispersive X-ray spectroscopy. The diffractogram exhibits a characteristic diffuse halo pattern superimposed with crystalline peaks, indicating existence of crystalline phases. The crystallization kinetics in non-isothermal conditions was studied by Differential Scanning Calorimetry. The electrical resistivity and the dimensions of samples Fe38Ni36B18Si8 were measured at room temperature. The temperature dependence of electrical resistivity was studied from 80 to 273 K. The measurements have shown a positive coefficient of electrical resistivity.

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This paper describes the specific electric conductivity of thin films of the polymer polyaniline, depending on the type of material that is used for doping the specified polymer. In our own laboratory, there were made four series of doped samples of polyaniline thin films of which two series were doped with sulfuric acid (PANI-H2SO4), and the other two were doped with hydrochloric acid (PANI-HCl). It is also significant that two series of the mentioned samples of thin films were obtained at room temperature (20°C), and the other two at 0°C. Next, the analysis of the specific electrical conductivity of all series was performed in order to demonstrate that the material that reaches the thin film affects its electrical conductivity

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