The study of aerosol dispersion in indoor environments is essential to understanding and mitigating airborne virus transmission, such as SARS-CoV-2. Computational Fluid Dynamics (CFD) has emerged as a valuable tool for investigating aerosol dispersion, providing an alternative to costly experimental methods. In this study, we investigated the performance of four (4) Reynolds-averaged Navier-Stokes (RANS) turbulence models in predicting aerosol dispersion from a human body coughing in a small, ventilated indoor environment. We compared the Standard, RNG, Realizable k-ϵ models and the SST k- ω model using the same boundary conditions. We initially observed that the horizontal distance of the coughed aerosols after 10.2s dispersion time was substantially shorter with the standard k-ϵ turbulence compared to the other three turbulence models compared to the SST k-ω model, the RNG, and realizable k-ϵ models exhibit a high degree of similarity in their dispersion patterns. Specifically, we observed that the aerosols dispersed horizontally faster with the RNG and Realizable k-ϵ models. In conclusion, when compared to qualitative data from the literature, our observations exclude the standard k-ϵ turbulence. However, to select the most appropriate turbulence model for capturing the cough flow and aerosol dispersion dynamics, further detailed validation against both quantitative and qualitative data is needed.

In dieser Arbeit wird eine Strategie zur Bewertung des Zuverlässigkeitsniveaus von gemauerten Gründerzeithäusern im Erdbebenlastfall vorgestellt. Die Nachbemessungsstrategie ermöglicht eine normgerechte Bewertung der Schubtragfähigkeit, des Erdbebenerfüllungsfaktors sowie des personenbezogenen Risikos einzelner Schubwände (aussteifende Zwischenwände) in Form von Nachbemessungstafeln. Die Nachbemessungstafeln ergeben sich im Wesentlichen durch die einschlägigen Normen, der aktuell angewandten Pushover-Berechnungsmethode im gemauerten Altbestand, der gründerzeitlichen Bauwerkscharakteristika und der Standortgegebenheiten im Raum Wien. Die methodische Herangehensweise umfasste eine ausführliche Bestandsanalyse von mehr als 200 Gründerzeithäuser, die Nachweisführung der betrachteten Bestandsobjekte im Erdbebenlastfall, eine Sensitivitätsanalyse der Einflussparameter auf das sich einstellende Sicherheitsniveau und die Ableitung sowie Vorstellung der Nachbemessungstafeln. Die Mauerwerksqualität konnte anhand von umfangreichen Mauerwerksuntersuchungen von 125 gründerzeitlichen Objekten in der vorgestellten Strategie berücksichtigt werden.

This paper, based on the documentation from the database of the International Criminal Tribunal for the former Yugoslavia (ICTY), is dedicated to the suffering of the "Banja Luka babies", one of the many cases of tragic childhood during the aggression against Bosnia and Herzegovina in 1992. The case of the agony of new-borns in the Banja Luka Clinical-Medical Centre (CMC) caused controversy in the public. It is the subject of propaganda speculations and various political calculations that do not stop even with the act of presenting the medical documentation of the deceased newborns as exhibits for the defence during the trial of Radoslav Brđanin before the ICTY. Brđanin was found guilty and at the end of the trial sentenced to 30 years in prison for crimes against humanity, violations of laws and customs of war, and serious violations of the 1949 Geneva Conventions.

Everyone is born with the right to life and the right to live that life with the dignity of a human being and a citizen, to have the right to choose education, place of residence, the right but not the obligation to start a family, the right to earn money and the freedom to dispose of it. Every man and citizen is a woman. However, it hasn't always been like that: The work deals with the position of women in society, and what is reflected on her position and status in the family throughout history and modern times. The main goal of the work is, through a cross-section of the past with a comparative analysis of the contemporary era, to realize productivity and full equality of the sexes in the near future. The work is based on the analysis of a heterogeneous family (the family of a man and a woman).

Plant extracts contain a large number of organic compounds, and one of the large groups of compounds present are phenolic compounds. Researchers have shown that a certain number of these compounds can be used as effective metal corrosion inhibitors. Plant extracts of raspberries (leaves, flowers, and fruit) were obtained by ultrasonic extraction using 96% ethanol as a solvent. The UV/Vis spectrophotometric method was used to determine the content of total phenols in plant extracts. Phenolic acids and flavonoids in plant extracts were separated and quantified using the HPLC method. Tafel extrapolation was used for electrochemical characteristics. The corrosion characteristics and behavior of bronze in 3% NaCl solution, with and without the presence of plant extracts were investigated. The content of total phenols in leaves was found to be 107.14±3.63 mg/g in flowers 148.99±9.02 mg/g and in fruits was 8.75±0.61 mg/g. Leaf extract in a concentration of 0.04828 g/L according to the Tafel extrapolation method provides the best protection for bronze in a 3% NaCl solution. The same concentration in the case of flower and fruit extracts proved to be the most favorable.

The paper deals with taxes and the tax system in Bosnia and Her­zegovina. Modern tax systems are based on taxation of income and con­sumption. For developing countries like Bosnia and Herzegovina, the tax­ation of consumption is more dominant than the taxation of income. This means that in such countries the participation of indirect taxes concerning direct taxes is higher. The basic taxation categories in Bosnia and Herzego­vina are corporate income tax, personal income tax, value-added tax, so­cial security contributions, and excises. The taxation system in Bosnia and Herzegovina is characterized by low tax rates. Personal income tax is paid at the rate of 10% which means that we have proportional tax rates. But so­cial security rates are high as follows (employee’s share): 17% for pension in­surance, 12,5% for health insurance and 1,5% for health insurance. We need some fiscal reforms within fiscal policy if we want to have higher salaries and standard of living.

The paper deals with foreign direct investments (FDI) with a spe­cial focus on Bosnia and Herzegovina. Most of the world’s economies are in­terested in FDI, especially today in a globalized society. They can generate new jobs, and contribute to the development of new technology, and their special contribution is reflected in the stimulation of economic growth, development and employment. In recent years, Bosnia and Herzegovina made a lot of effort to attract foreign direct investments as one of the important ways to stimulate economic development and solve the problem of unemployment Considerable progress in this field has been achieved by adjusting the legislation and institutional framework. The costs, procedures and time of registration of craft-entrepreneurial activ­ities have been reduced, and various benefits in the field of customs and tax­es have been provided, which will be presented in the paper

In this paper the influence of different process parameters on surface roughness responses in plasma jet cutting process was investigated. Experimentations were conducted on shipbuilding aluminium 5083 sheet thickness 8 mm. Experimental work was performed according to Taguchi L27 orthogonal array by varying four parameters such as gas pressure, cutting speed, arc current and cutting height. Due to complexity of manufacturing process and aim to cover wide experimental space few constraints regarding cutting area were defined. Surface roughness parameters Ra and Rz were analysed as cut quality responses. In order to define mathematical model that will be able to describe effects of process parameters on surface roughness artificial intelligence (AI) fuzzy logic (FL) technique was applied. After functional relations between input parameters and surface roughness responses were defined prediction accuracy of developed fuzzy logic model was checked by comparison between experimental and predicted data. Mean absolute percentage error (MAPE) as well as coefficient of determination (R2) were used as validation measures. Finally, optimal process conditions that lead to minimal surface roughness were defined by creating response surface plots.

The removal of copper ions from aqueous solutions using bean shells as an adsorbent is presented in this paper. The influence of the solution solution pH on the biosorption capacity was investigated. The biosorption capacity increased with the increase in the solution pH. The pseudo-second order kinetic model showed the best agreement with the analyzed experimental data, indicating that chemisorption could be a possible way of binding the copper ions to the surface of the bean shells. The Langmuir isotherm model best fitted the analyzed isotherm data. The SEM-EDS analysis was performed before and after the biosorption process. The change in the morphology of the sample after the biosorption process was evident, whereby K, Mg, Si, and Ca were possibly exchanged with copper ions. Response Surface Methodology (RSM) based on the Box-Behnken design (BBD) was used to optimize the biosorption process, with the selected factors: the solution pH, initial copper ions concentration, and contact time. The optimum biosorption conditions were determined to be: pH = 3-4, initial copper ions concentration 100 mg dm-3, and contact time 10-30 minutes.