This study provides a new perspective on trust in artificial intelligence (AI), examining people's attitudes toward trust in the use of AI systems in particular. The aim of this study is to examine attitudes and to know what are the advantages and disadvantages of artificial intelligence (AI). Also, in addition to the empirical part, this paper also deals with theoretical knowledge about artificial intelligence, which is the basis of the existing literature. For the purposes of this research, the authors created a survey based on secondary sources. The survey was conducted on the entire territory of Serbia. The subject of this work is the examination of the attitudes and knowledge of the inhabitants of Serbia about artificial intelligence as well as its technologies, which focuses on a deeper understanding of the perceptions and attitudes of the public in Serbia about artificial intelligence.

Aluminium and silicon particles in fuel known as “cat fines” are catalytic residues from the refinery process. They can cause mechanical damage to fuel pumps, injectors, piston rings and cylinder liners. They are very hard and highly abrasive, thus causing abrasive wear to main engine components. These impurities in marine fuel must be minimised to recommended levels. One of the main tasks of the fuel treatment plant on a ship is to separate solids and water from the fuel. Modern vessels are equipped with fuel separators which rotate at a high speed (more than 6,000 rev/min) producing centrifugal force and providing good separating effect even for small solid particles (Al+Si). Proper settling and regular drainage from the tanks, even when adequate filtration is applied, are not sufficient for proper fuel preparation. The quality of purifier operation varies over years because it is affected by a large number of factors. For the purpose of this paper, over twelve thousand fuel samples were analysed to determine the current efficiency of the purifiers and whether they can meet the stringent requirements of marine engine manufacturers. The data will be taken from a tanker ship, considering different operational scenarios. These scenarios are linked to the maximum possible fuel consumption on the ship during exploitation. Using the Simulink program for the system simulation, optimisation can be achieved in the operation of fuel separator. This optimization refers to the required amount of fuel and quality of separation, particularly concerning the removal of abrasive impurities.

Ensuring the proper operation of a ship’s propulsion system necessitates the use of high-quality fuels. Several factors contribute to fuel quality, including the source of origin crude oil, refining methods, blending processes, and the quality of storage and distribution. Marine fuels must adhere to international standards such as ISO standards to be suitable for consumption on ships.

This article presents an analysis of over 6000 fuel samples obtained from two sample points within a purification system, conducted by independent laboratories. While all samples must meet the ISO 8217:2017 Standard for marine residual fuel before bunkering, this analysis focuses on elements with potentially harmful effects on marine engine systems. A comprehensive examination will be conducted, employing an inductive method to draw general conclusions about the current levels of abrasive impurities and other detrimental elements in fuels post-purification.

Specific attention will be given to elements like aluminium, silicon, vanadium, calcium, magnesium, lead, nickel, potassium, sodium, zinc, and phosphorus present in residual fuel oils. These elements, in certain forms or concentrations, pose challenges to marine engines. Testing conducted according to the IP 501 standard, utilizing inductively coupled plasma emission spectrometry, is essential to ensuring smooth engine operation and mitigating damages and associated costs caused by abrasive fines in the fuel oil.

The existence of an efficient system of public health care in the social community is a characteristic for a quality social entity and a measuring element of the life quality in a population. Like any other sub-system in the state, it is necessary to finance the sustainable development of the public health system. The paper contains an analysis of several payments models from the funds of the obligatory health insurance to the health system and health service providers, with a presentation of the existing systems and models of covering costs. For this purpose, research was conducted by comparing historical data on health care costs and analyzing their trends. The aim of the paper is to research and select adequate financing models for provided health services, which is the job of managers in health care, in order to choose between several models developed for this purpose. The manner in which health care costs are settled in the Republic of Srpska, as well as the amounts in the observed period, is also shown. Conclusions on trends confirmed, that the costs of medical treatments, for which the state allocates money for the health care system, are increasing. At the same time, it was observed that the number of insured persons is decreasing, and that despite the relatively high average allocation for treatment per capita, considerable amounts of direct personal payment for services and medicines are still high, which are either not available from obligatory health insurance, or are difficult to access through regular procedures. Keywords: health care, health insurance, medical costs, financing models.

Nasilje nad ženama identifikuje se kao stalna odlika bosanskohercegovačkog društva, sa sve izraženijom tendencijom da i femicid postane njegova konstanta. U prvom dijelu rada analizira se značaj feminizma kao segmenta ideološkog političkog diskursa koji utiče na zakonodavnu aktivnost političke vlasti, ali i na društvo na opštem nivou u odnosu i borbi protiv nasilja nad ženama. Ukazano je na specifičnosti feminizma, na istoriju i razvijenost ženskog pokreta u Bosni i Hercegovini, sa fokusom na nedovoljnu prihvaćenost, uvaženost i uključenost feminizma u politički život našeg društva.

Porodica kao osnovna ćelija društva, danas je ozbiljno ugrožena, s obzirom da je povećan broj nasilja u porodici gdje je žrtva najčešće žena. Stoga, u kontekstu nasilja u porodici, drugi dio rada se bavi problematikom nasilja nad ženama, prvenstveno femicida, sa zakonskog aspekta.

Cilj je ukazati na značaj inkriminacije femicida i adekvatne zakonske zaštite žena, a sve u cilju prevencije femicida, procesuiranja i kažnjavanja izvršioca.

The term "lifestyle" is a central concept of Adler's theory of personality, which he defines as a characteristic pattern of behavior that is a manifestation of a unique way of perceiving, conceptualizing, behaving and personal striving towards a goal that is filled with subjective meaning and represents part of the striving for power (Croake, 1975). Personality traits represent dimensions of individual differences that relate to a person's tendency to exhibit consistent patterns of thought, feeling, and action (McCrae & Costa, 1985). The research sample consisted of a total of 211 respondents, mostly students of the University of East Sarajevo surveyed via online questionnaires, of which 135 were female and 76 were male. Measuring instruments with satisfactory measurement characteristics were used: Questionnaire for examining the Big Five personality model (Goldberg, 1992), a modified version of the Allport-Vernon-Lindzis value scale for measuring lifestyles, a Scale for examining the sociodemographic characteristics of the respondents, and a Scale for examining academic performance. The obtained data show that of all personality dimensions of the Big Five model, only conscientiousness has a statistically significantly positive correlation with achieved academic success expressed through the average grade in studies (r=.24), which is not surprising, because this is a trait that is consistently associated with academic and business success in a large number of studies. Four lifestyle styles statistically significantly correlate with achieved academic success: family-sentimental style (r=.15), cognitive style (r=0.16), popularity-oriented style (r=-.19) and Promethean activism (r=.15). Although none of the mentioned correlations are high, they indicate the undoubted existence of a connection between these constructs and the role that lifestyles as complex systems of values, goals, attitudes and beliefs play in determining the final forms of behavior and achieved results within the educational system.

Observed from the school education system, it can be said that the entire educational activity should respect the needs and possibilities of each student and develop his potential to the maximum. In parallel with the development of students' potential, the students' needs for everyday coping and solving problem situations also grow. Contemporary views on students' acquisition of knowledge and skills in mathematics teaching is learning through inquiry and problem solving. In this paper, we will answer the question whether the application of problem-based teaching makes the teaching of mathematics interesting for students. We will examine how students, parents and teachers think, to what extent the application of problem-based learning, teaching and problem solving in mathematics classes makes mathematics teaching interesting for students, from the perspective of students, parents and teachers. 

Optical detection of plant stress in real-time is crucial as it enables timely interventions to mitigate potential damage. This study presents a detailed evaluation of a system that detects changes in plant metabolism in real-time by distributing optical signals across the leaf. The methodology facilitates continuous monitoring of changes in the optical properties of plant leaves through measurements of optical transmission coefficients using a 665 nm LED light signal, thereby recording the circadian rhythm over time. Given that the photosynthetic processes within the leaves are closely linked to the plant’s overall health, this system can detect stress caused by various factors and identify metabolic changes by analysing the circadian rhythm patterns of the observed plants.
For inducing metabolic changes, the plant Vriesea carinata Wawra, a verified representative of dual metabolism, was subjected to high light intensity stress. To validate the method, the collected results were compared with data obtained through chemical methods to establish a correlation between the traditional, destructive method and the non-destructive, optical method.
The findings successfully identify circadian rhythms as parameters for recognizing changes in plant metabolism, demonstrating the significance of the proposed method in researching plant physiology through the optical identification of biological processes.

The adsorption process of metal oxide nanoparticles has been studied as an effective means of removing organic and inorganic contaminants from water and wastewater. In this study, iron (III) oxide (Fe3O4) nanoparticles were synthesized in the presence of moringa oleifera pods (MOP) as an adsorbent for ciprofloxacin (CIP) adsorption. Moringa oleifera pod biochar with Fe3O4 particles precipitated on the surface of biochar was synthesized by co-precipitation method. The effect of various parameters such as contact time, pH, metal concentration and adsorbent dosage on the removal efficiency was determined. The maximum adsorption capacity of CIP by magnetic moringa composite (MMC) was 96.12 mg/g. The Langmuir and Freundlich isotherm equations were used to analyze the equilibrium isotherm data. The adsorption process fit well with the second-order kinetics in all cases, and the Langmuir isotherm equation fitted well with the experimental data.

The environmental hazards of antibiotics have captivated increasing research focus, but their environmental behaviours remain unclear in water sources. Thus, this study focused on exploring the interaction mechanisms between Moringa Oleifera pod-modified feldspar clay (MFC) and ciprofloxacin (CIP) during sorption process. The efficiency of these adsorbents in aqueous solution adsorption of CIP were investigated as a function of pH, time and sorbate concentration. The impact of pH solution and CIP evolution showed that CIP sorption on MFC is strongly reliant on pH solution. Kinetic studies authenticated that the CIP sorption mechanism was a physisorption involving ion exchange and surface complexation mechanisms. The mechanism of CIP sorption on MFC was successfully studied using characterization techniques. The Langmuir and Freundlich isotherm equations were used to analyze the equilibrium isotherm data. The adsorption process fitted well with the second-order kinetics and the Langmuir isotherm equation fitted well with the experimental data. The Langmuir isotherm showed that maximum adsorption capacity was found to be 57.61 mg. g-1. Thermodynamic factors: ΔG° values of -29 kJ.mol-1, ΔH° = 17 kJ.mol-1, and ΔS° = 163 J.mol-1 k of CIP adsorbed onto MFC indicate that the adsorption was spontaneous and endothermic in nature.